CN104455469A - Throttling serial type multistage pressure reduction and adjustment valve - Google Patents
Throttling serial type multistage pressure reduction and adjustment valve Download PDFInfo
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- CN104455469A CN104455469A CN201410514049.9A CN201410514049A CN104455469A CN 104455469 A CN104455469 A CN 104455469A CN 201410514049 A CN201410514049 A CN 201410514049A CN 104455469 A CN104455469 A CN 104455469A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention provides a throttling serial type multistage pressure reduction and adjustment valve. A valve rod and a valve element assembly are arranged inside a valve body; a valve seat assembly is provided with multistage pressure reduction units, and each stage of pressure reduction unit of the valve seat assembly is composed of a cylindrical fluid expansion unit and a throttling unit, wherein the throttling unit is shaped like a circular truncated cone, and the area of the throttling unit decreases gradually; correspondingly, the pressure reduction units are arranged on corresponding positions of the valve element assembly, wherein the stage number of the pressure reduction units in the valve element assembly is equal to that of the pressure reduction units in the valve seat assembly; each stage of the pressure reduction unit of the valve element assembly is composed of a bowl-shaped molded surface for controlling flow and a cylindrical shrinkage unit; the upper portion of the valve element assembly is provided with valve elements, and the lower portion of the valve element assembly is provided with guide rods; valve bottom drainage holes are formed in the positions, located on the outer sides of valve seat guide holes, of the bottom of the valve seat assembly; a flow diversion sleeve is arranged on the top of the valve seat assembly, and a flow diversion hole is formed in one side of the flow diversion sleeve. According to the throttling serial type multistage pressure reduction and adjustment valve, the service life of the valve can be prolonged, vibration and noise of pipelines behind the valve can be eliminated, and it is guaranteed that the adjustment accuracy of the valve is high and operation is stable under the working condition that the pressure difference is large and solid particles exist in media in the Texaco process of coal chemical industries.
Description
Technical field
The present invention is mainly used in the pressure/Flow-rate adjustment in Coal Chemical Industry Texaco technique, be specially adapted to high pressure ash exit of pump control to the backflow of oxygen-eliminating device, containing a certain amount of solid particle in this station medium, valve pressure reduction is comparatively large, controls accurately pressure/traffic requirement.
Background technique
Texaco's technique is one of prevailing technology of coal chemical industry.At specific station, valve pressure reduction is comparatively large, and has certain solid content in medium.Generally use single seat Angle Throttle Valves under this working condition at present, but working life is short, easily cavitates mainly due to pressure reduction ambassador liquid medium, the larger energy of cavitation erosion release damages trim; Under High Pressure Difference, velocity of medium is large, and high-speed Medium carries solid particle and causes larger washing away to internals; Due to the existence of cavitation erosion, after valve, in pipeline, noise is very big, and pipeline vibration is violent.For this operating mode, domestic manufacturer mainly starts with from enhancing internals hardness aspect, and change intensity, material that hardness is higher, resistance to erosion aspect receives certain effect, but noise, vibration still exist; Ye You producer attempts using conventional sleeve valve (see Fig. 1), this valve has certain effect to control media flow velocity, but because it needs spool and sleeve laminating, realized the control of pressure/flow by the area of passage of moving valve core change sleeve, degree of regulation is accurate not; Solid particle is easily clipped between spool and sleeve, causes motion bite, scratch trim; Worry solid particle blocking runner, can only use single-stage sleeve, reduced pressure capabilities is limited, can not eliminate cavitation erosion during pressure reduction height.Above-mentioned two schemes all not can solve the use problem of this station.Chinese patent 201320464491.6 discloses a kind of Texaco technique modulating valve, although it has spool and sleeve two-stage decompression, but there are two subject matters in this valve: sleeve when being small guide vane is not obvious as second level decompression, two is under large pressure reduction operating mode, two-stage effectively can not eliminate cavitation erosion, and internals are still serious by cavitation erosion.
Summary of the invention
The object of the present invention is to provide a kind of throttling serial type multistage pressure-reducing regulation valve, its pressure reduction in Coal Chemical Industry Texaco technique is comparatively large, in medium containing the working life can improving valve under the operating mode of solid particle, eliminate the vibration of pipeline after valve, noise, and ensure that valve has higher degree of regulation, operate steadily, in course of action, bite does not occur.
Realize the technological scheme of the object of the invention: a kind of throttling serial type multistage pressure-reducing regulation valve, it comprises valve body, valve body lower portion connecting valve seat assembly, and valve rod and mangetic core assembly are arranged on valve inner; Described valve rod passes the built-in stuffing box of valve body, and end is connected with the spool of mangetic core assembly; Between valve rod and the inwall of stuffing box, filler assembly is set; Valve body top is connected by middle flange bolt nut with middle flange;
Valve component arranges multi-step pressure reduction unit, every grade of decompressing unit of valve component by columniform fluid expansion unit and frustoconic shape, the throttling unit of area convergent forms; Corresponding, mangetic core assembly corresponding position arranges the decompressing unit equal with valve component progression, and every grade of decompressing unit of mangetic core assembly is made up of the alms bowl shape profile and columniform contraction unit controlling flow; Above-mentioned mangetic core assembly and valve component coordinate formation multi-stage path, the fluid expansion unit of valve component and the alms bowl shape profile of upper level mangetic core assembly form fluid expansion passage and make media deceleration, and then the throttling unit of valve component and the contraction unit of mangetic core assembly form commutation runner and medium are accelerated gradually, and the minimum area of passage that the throttling unit root of valve component and the alms bowl shape positive of mangetic core assembly at the same level are formed afterwards determines the negotiability of this runner;
The top of mangetic core assembly is spool, and bottom is guide rod, leads in the valve seat pilot hole inside that guide rod is offered all the time bottom valve component;
Conduction hole bottom valve is offered bottom valve component, outside valve seat pilot hole; Fair water sleeves is set at valve component top, offers pod apertures in fair water sleeves side; Medium is flowed into by conduction hole bottom valve, enters the multi-stage path of mangetic core assembly and valve component formation, is flowed out by the pod apertures of fair water sleeves side.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, filler assembly top described in it arranges hold-down grid and hold-down grid bolt and nut, hold-down grid is pressed down by tightening hold-down grid bolt and nut, power is passed on filler assembly, valve rod and filler assembly, filler assembly and stuffing box are fitted tightly.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, it arranges valve seat wound gasket at valve body and valve component joint, compresses valve seat wound gasket, medium can not be leaked from the gap location of valve body and valve component by valve seat Cock screw.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, it arranges stuffing box wound gasket at stuffing box and valve body joint, and power is passed to stuffing box wound gasket by stuffing box by described middle flange while fastening, and stuffing box wound gasket is compressed.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, the valve body lower portion described in it is connected by valve seat Cock screw with valve component.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, the valve rod described in it is connected with exterior operator, and power that this actuator provides drives mangetic core assembly to move up and down, mangetic core assembly coordinate with valve component realize valve unlatching, closedown and adjustment.
A kind of throttling serial type multistage pressure-reducing regulation valve as above, the sealing surface of its spool and the sealing surface of valve seat fit, and when reaching certain seal pressure, valve closing.
Any one throttling serial type multistage pressure-reducing regulation valve as above, the mangetic core assembly described in it, valve component arrange 3 ~ 5 grades of decompressing unit.
Throttling serial type multistage pressure-reducing regulation valve of the present invention, combine single seat throttling to pressure/flow control accurately and conventional sleeve modulating valve eliminate the advantage of cavitation erosion, overcome again respective deficiency, concrete effect is as follows simultaneously:
The present invention is by introducing multi-stage path, higher pressure reduction is split in multistage on, be equivalent to the series connection of multiple single-seat valve, progression is more, the pressure reduction that every one-level is born is less, and static pressure is less to the amplitude of kinetic transformation, can be more stable maintain more than saturation vapour pressure, thus effectively prevent the generation of flash distillation and cavitation erosion, eliminate thing followed noise and vibration.Simultaneously, multi-stage path consumes medium energy by flow direction, the constantly mode such as area of passage, friction media of change medium changing medium, reduce velocity of medium, because eroding velocity is directly proportional to the cube of flow velocity, have benefited from the reduction of flow velocity, the degradation degree of medium to trim alleviates, and the working life of trim extends.
The present invention is coordinated with multistage valve seat by spool, accurately controls orifice size and continuously changes; The controlled Flow characteristics of valve is realized by specific spool figure.
The present invention can set runner progression according to actual conditions, while guaranteeing that medium flash distillation does not occur, remains larger area of passage, guarantees valve event not bite.
The present invention arranges fair water sleeves, and control media is to valve body far-end and not easily wash away, be not afraid of the direction flowing of washing away, and avoid medium directly washing away valve body, protection valve body, extends the working life of valve.
Valve rod of the present invention is in total travel adjustment process, valve rod head guide rod is all positioned within valve seat pilot hole and leads, guarantee that valve rod is standing not stray under the operating mode that medium washes away, effectively can reduce the amplitude that valve rod washes away by medium, reduce noise, and prevent the bite that valve rod plastic deformation causes.
The present invention flows to go out for side is entered at the end, and opposite side enters the end and goes out, and valve rod is stressed more stable, even, and valve can bear higher pressure reduction.
Accompanying drawing explanation
Fig. 1 is conventional sleeve valve arrangement schematic diagram;
Fig. 2 is a kind of throttling serial type multistage pressure-reducing regulation valve structure of the present invention and MEDIA FLOW cardon;
Fig. 3 is mangetic core assembly structural representation;
Fig. 4 is valve component structural representation.
In figure: 1. valve body; 2. valve component; 4. fair water sleeves; 5. stuffing box; 6. flange in; 7. mangetic core assembly; 8. spool; 9. valve rod; 10. filler assembly; 11. hold-down grids; Flange bolt nut in 12.; 13. hold-down grid bolt and nuts; 14. valve seat Cock screws; 15. stuffing box wound gaskets; 16. valve seat wound gaskets; 17. inwalls; The sealing surface of 18. spools; The sealing surface of 19. valve seats; 20. alms bowl shape profiles; 21. throttling unit; 22. multi-stage paths; 23. pod apertures; 24. guide rods; 25. valve seat pilot holes; Conduction hole bottom 26. valves; 27. fluid expansion unit; 28. shrink unit.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of throttling serial type multistage pressure-reducing regulation valve of the present invention is further described.
As shown in Figure 2, a kind of throttling serial type multistage pressure-reducing regulation valve of the present invention, it comprises valve body 1, valve component 2, stuffing box 5, middle flange 6, mangetic core assembly 7, filler assembly 10, hold-down grid 11, middle flange bolt nut 12, hold-down grid bolt and nut 13, valve seat Cock screw 14, stuffing box wound gasket 15, valve seat wound gasket 16 etc.
Wherein, valve body 1 bottom is connected by valve seat Cock screw 14 with valve component 2.Valve seat wound gasket 16 is set at valve body 1 and valve component 2 joint, compresses valve seat wound gasket 16 by valve seat Cock screw 14, medium can not be leaked from the gap location of valve body 1 and valve component 2.
It is inner that valve rod 9 and mangetic core assembly 7 are arranged on valve body 1.Valve rod 9 passes the built-in stuffing box 5 of valve body 1, and end is connected with the spool 8 of mangetic core assembly 7.Filler assembly 10 is set between valve rod 9 and the inwall 17 of stuffing box.Valve body 1 top is connected by middle flange bolt nut 12 with middle flange 6.At stuffing box 5 and valve body 1 joint, stuffing box wound gasket 15 is set, power is passed to stuffing box wound gasket 15 by stuffing box 5 by middle flange 6 while fastening, stuffing box wound gasket 15 is compressed, ensures that medium can not leak from the gap of valve body 1 and stuffing box 5.
Filler assembly 10 top arranges hold-down grid 11 and hold-down grid bolt and nut 13, hold-down grid 11 is pressed down by tightening hold-down grid bolt and nut 13, power is passed on filler assembly 10, valve rod 9 is fitted tightly with stuffing box 5 with filler assembly 10, filler assembly 10, thus ensures that medium can not leak from from the gap location between three.
As shown in Figure 3 and Figure 4, valve component 2 arranges three grades of decompressing unit, every grade of decompressing unit of valve component 2 by columniform fluid expansion unit 27 and frustoconic shape, the throttling unit 21 of area convergent forms; Corresponding, mangetic core assembly 7 corresponding position arranges the decompressing unit of equal with valve component 2 progression (three grades), and every grade of decompressing unit of mangetic core assembly 7 is made up of the alms bowl shape profile 20 and columniform contraction unit 28 controlling flow.Above-mentioned mangetic core assembly 7 and valve component 2 coordinate formation multi-stage path 22, the fluid expansion unit 27 of valve component and the alms bowl shape profile 20 of upper level mangetic core assembly form fluid expansion passage makes media deceleration, and then the throttling unit 21 of valve component and the contraction unit 28 of mangetic core assembly form commutation runner and medium are accelerated gradually, and throttling unit 21 root of valve component and the alms bowl shape profile 20 of mangetic core assembly at the same level coordinate the minimum area of passage formed to determine the negotiability of this runner afterwards.
The top of mangetic core assembly 7 is spool 8, and bottom is guide rod 24, leads in valve seat pilot hole 25 inside that guide rod 24 is offered all the time bottom valve component 2;
Conduction hole 26 bottom valve is offered bottom valve component 2, outside valve seat pilot hole 25; Fair water sleeves 4 is set at valve component 2 top, offers pod apertures 23 in fair water sleeves 4 side; Medium is flowed into by conduction hole bottom valve 26, enters the multi-stage path 22 of mangetic core assembly 7 and valve component 2 formation, is flowed out by the pod apertures 23 of fair water sleeves 4 side.
Valve rod 9 is connected with exterior operator, and power that this actuator provides drives mangetic core assembly 7 to move up and down, mangetic core assembly 8 coordinate with valve component 2 realize valve unlatching, closedown and adjustment.
During a kind of throttling serial type multistage pressure-reducing regulation valve work of the present invention:
When the sealing surface 18 of spool and the sealing surface 19 of valve seat fit, and when reaching certain seal pressure, valve closing; Mangetic core assembly 7 is moved down into a certain aperture, the different parts of throttling unit 21 root of valve component and the alms bowl shape profile 20 of mangetic core assembly at the same level forms area of passage restrictor ring not etc., determining the conveyance capacity of this aperture lower valve, changing the pressure/flow of flow resistance coefficient so as to regulating valve of valve by changing aperture.
As shown in Figure 1, medium flows into from conduction hole 26 bottom valve, and enter the multi-stage path 22 that mangetic core assembly 7 and valve component 2 are formed, the conveyance capacity of multi-stage path 22 is dynamic variable quantity, and spool moves up, and conveyance capacity increases; Spool moves down, and conveyance capacity reduces.Spool is in arbitrary aperture, the fluid expansion unit 27 of the valve seat group in multi-stage path 22 and the alms bowl shape profile 20 (first order is guide rod 24) of mangetic core assembly all can form fluid expansion passage makes media deceleration, the contraction unit 28 of the throttling unit 21 of valve component and mangetic core assembly forms commutation runner and medium is accelerated gradually, pressure reduction shared in the process of constantly deceleration, break-in, acceleration multistage on.
Relative single seat throttle valve, every grade to bear pressure reduction less, and what static pressure can be more stable maintains more than saturation vapour pressure, thus effectively prevents the generation of cavitation and cavitation erosion, eliminates the noise and vibration of pipeline after valve whereby; The flow velocity of medium is lower simultaneously, little to washing away of trim, and the working life of trim extends.In addition, multi-stage path 22 has continued the larger area of passage of single-seat valve, ensures that mangetic core assembly 7 is in the process of action, bite does not occur, it also avoid the danger of graininess medium scratch internals.Valve is in the total travel regulated, and mangetic core assembly head guide rod 24 leads in valve seat pilot hole 25 inside all the time, can ensure the stability of valve rod under medium washes away operating mode.Medium flows into from pod apertures 26 bottom valve, spool all directions uniform force, and mangetic core assembly 7 moves more stable; Flow out from pod apertures 23, control media is to valve body far-end and not easily wash away, be not afraid of the direction flowing of washing away, and protection valve body, extends the working life of valve.
The present invention passes through mangetic core assembly and the valve component cooperation of given shape, forms the runner that area of passage repeatedly reduces with certain rule, increases, is also multi-step pressure reduction runner, reduces pressure step by step, avoid medium flash distillation and cavitation erosion, eliminate duct noise and vibration; The number of times that Flow area reduces (or increase) is called the progression of this valve; Valve seat maintains static, and valve rod drives the spool with certain profile to move up and down, the flow channels area that change spool figure and valve seat throttleng surface are formed, thus reaches the object of pilot pressure/flow.
Conventional sleeve regulation valve core and sleeve are Spielpassung, the control of pressure/flow is realized by the quantity of flowing hole on moving valve core change sleeve, but can not continuously change with the modified flow area of stroke, in adjustment process, dead band is comparatively large, inapplicable in the occasion accurately controlled pressure/traffic requirement.The present invention is coordinated with multistage valve seat by spool, accurately controls orifice size and continuously changes; The controlled Flow characteristics of valve is realized by certain spool figure.
Conventional sleeve regulation valve core and sleeve are Spielpassung, and solid particle is easily clipped between spool and sleeve, cause motion bite, and graininess medium easily abrades internals; Single-stage sleeve can only be used owing to worrying solid particle blocking runner, when pressure reduction is large, flash distillation and cavitation erosion can not be eliminated completely.The present invention can set runner progression according to actual conditions, while guaranteeing that medium flash distillation does not occur, remains larger area of passage, guarantees valve event not bite.
Claims (8)
1. a throttling serial type multistage pressure-reducing regulation valve, it comprises valve body (1), valve body (1) bottom connecting valve seat assembly (2), it is inner that valve rod (9) and mangetic core assembly (7) are arranged on valve body (1), it is characterized in that: described valve rod (9) is through the built-in stuffing box (5) of valve body (1), and end is connected with the spool (8) of mangetic core assembly (7); Filler assembly (10) is set between valve rod (9) and the inwall (17) of stuffing box; Valve body (1) top is connected by middle flange bolt nut (12) with middle flange (6);
Valve component (2) arranges multi-step pressure reduction unit, every grade of decompressing unit of valve component (2) by columniform fluid expansion unit (27) and frustoconic shape, the throttling unit (21) of area convergent forms, corresponding, mangetic core assembly (7) corresponding position arranges the decompressing unit equal with valve component (2) progression, and every grade of decompressing unit of mangetic core assembly (7) is made up of the alms bowl shape profile (20) and columniform contraction unit (28) controlling flow, above-mentioned mangetic core assembly (7) and valve component (2) coordinate formation multi-stage path (22), the fluid expansion unit (27) of valve component and the alms bowl shape profile (20) of upper level mangetic core assembly form fluid expansion passage and make media deceleration, and then the throttling unit (21) of valve component and the contraction unit (28) of mangetic core assembly form commutation runner and medium are accelerated gradually, throttling unit (21) root of valve component and the alms bowl shape profile (20) of mangetic core assembly at the same level coordinate the minimum area of passage formed to determine the negotiability of this runner afterwards,
The top of mangetic core assembly (7) is spool (8), bottom is guide rod (24), leads in valve seat pilot hole (25) inside that guide rod (24) is offered in valve component (2) bottom all the time;
Conduction hole bottom valve (26) is offered outside valve component (2) bottom, valve seat pilot hole (25); Fair water sleeves (4) is set at valve component (2) top, offers pod apertures (23) in fair water sleeves (4) side; Medium is flowed into by conduction hole bottom valve (26), enter the multi-stage path (22) that mangetic core assembly (7) and valve component (2) are formed, flowed out by the pod apertures (23) of fair water sleeves (4) side.
2. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 1, it is characterized in that: described filler assembly (10) top arranges hold-down grid (11) and hold-down grid bolt and nut (13), hold-down grid (11) is pressed down by tightening hold-down grid bolt and nut (13), power is passed on filler assembly (10), valve rod (9) and filler assembly (10), filler assembly (10) and stuffing box (5) are fitted tightly.
3. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 1, it is characterized in that: valve seat wound gasket (16) is set at valve body (1) and valve component (2) joint, compress valve seat wound gasket (16) by valve seat Cock screw (14).
4. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 1, it is characterized in that: at stuffing box (5) and valve body (1) joint, stuffing box wound gasket (15) is set, power is passed to stuffing box wound gasket (15) by stuffing box (5) by described middle flange (6) while fastening, and stuffing box wound gasket (15) is compressed.
5. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 1, is characterized in that: described valve body (1) bottom is connected by valve seat Cock screw (14) with valve component (2).
6. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 1, it is characterized in that: described valve rod (9) is connected with exterior operator, power that this actuator provides drives mangetic core assembly (7) to move up and down, mangetic core assembly (8) coordinate with valve component (2) realize valve unlatching, closedown and adjustment.
7. a kind of throttling serial type multistage pressure-reducing regulation valve according to claim 6, is characterized in that: the sealing surface (18) of spool and the sealing surface (19) of valve seat fit, and when reaching certain seal pressure, valve closing.
8. according to any one throttling serial type multistage pressure-reducing regulation valve described in claim 1 to 7, it is characterized in that: described mangetic core assembly (7), valve component (2) arrange 3 ~ 5 grades of decompressing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410514049.9A CN104455469A (en) | 2014-09-29 | 2014-09-29 | Throttling serial type multistage pressure reduction and adjustment valve |
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| CN201410514049.9A CN104455469A (en) | 2014-09-29 | 2014-09-29 | Throttling serial type multistage pressure reduction and adjustment valve |
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| CN104455469A true CN104455469A (en) | 2015-03-25 |
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| CN201410514049.9A Pending CN104455469A (en) | 2014-09-29 | 2014-09-29 | Throttling serial type multistage pressure reduction and adjustment valve |
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| CN109404606A (en) * | 2018-12-29 | 2019-03-01 | 吴忠仪表有限责任公司 | Pressure balance type high-precision high voltage difference control valve |
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| CN112879637A (en) * | 2021-03-16 | 2021-06-01 | 杭州鼎安动力设备有限公司 | Multi-stage adjustable pressure reducing valve |
| CN113108070A (en) * | 2021-05-08 | 2021-07-13 | 浙江理工大学 | Multistage pressure reduction string type liquid level regulating valve structure |
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| CN113639094A (en) * | 2021-08-28 | 2021-11-12 | 杭州富阳良工仪表有限公司 | Cascade type multi-stage pressure reduction regulating valve |
| WO2022019813A1 (en) | 2020-07-22 | 2022-01-27 | Bvt Sweden Ab | A water flow control valve |
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| CN114635983A (en) * | 2020-03-18 | 2022-06-17 | 合肥通用机械研究院有限公司 | Fluid driven valve core rotary type multiphase flow control valve |
| CN114688260A (en) * | 2022-02-25 | 2022-07-01 | 中石化四机石油机械有限公司 | Ultrahigh pressure long-life throttle valve for petroleum drilling high-pressure pump test |
| CN116221468A (en) * | 2023-03-09 | 2023-06-06 | 浙江三方控制阀股份有限公司 | Self-operated multistage rotary pressure reducing valve |
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| CN106523725A (en) * | 2016-12-15 | 2017-03-22 | 吴忠中创自控阀有限公司 | Cascaded type zero-leakage valve interior assembly |
| CN106523725B (en) * | 2016-12-15 | 2018-12-28 | 吴忠中创自控阀有限公司 | Cascade zero-leakage valve inner assembly |
| CN109404606A (en) * | 2018-12-29 | 2019-03-01 | 吴忠仪表有限责任公司 | Pressure balance type high-precision high voltage difference control valve |
| SE1930246A1 (en) * | 2019-07-16 | 2021-01-17 | Bvt Sweden Ab | A water flow control valve |
| CN110645405A (en) * | 2019-09-20 | 2020-01-03 | 苏州赛米流体控制技术有限公司 | Quiet type flow control valve |
| CN114635983A (en) * | 2020-03-18 | 2022-06-17 | 合肥通用机械研究院有限公司 | Fluid driven valve core rotary type multiphase flow control valve |
| CN114635983B (en) * | 2020-03-18 | 2023-12-12 | 合肥通用机械研究院有限公司 | Fluid-driven valve core rotary multiphase flow control valve |
| CN113494642A (en) * | 2020-04-08 | 2021-10-12 | 中国石油天然气股份有限公司 | Injection allocation assembly and injection allocation device |
| WO2022019813A1 (en) | 2020-07-22 | 2022-01-27 | Bvt Sweden Ab | A water flow control valve |
| CN112879637A (en) * | 2021-03-16 | 2021-06-01 | 杭州鼎安动力设备有限公司 | Multi-stage adjustable pressure reducing valve |
| CN113108070A (en) * | 2021-05-08 | 2021-07-13 | 浙江理工大学 | Multistage pressure reduction string type liquid level regulating valve structure |
| CN113639094A (en) * | 2021-08-28 | 2021-11-12 | 杭州富阳良工仪表有限公司 | Cascade type multi-stage pressure reduction regulating valve |
| CN113639094B (en) * | 2021-08-28 | 2023-11-03 | 杭州富阳良工仪表有限公司 | Cascade type multi-stage pressure reducing regulating valve |
| CN113503364A (en) * | 2021-09-09 | 2021-10-15 | 中国空气动力研究与发展中心高速空气动力研究所 | Throttling cone flow adjusting device |
| CN114215925A (en) * | 2021-12-23 | 2022-03-22 | 国能(福州)热电有限公司 | Regulating valve |
| CN114688260A (en) * | 2022-02-25 | 2022-07-01 | 中石化四机石油机械有限公司 | Ultrahigh pressure long-life throttle valve for petroleum drilling high-pressure pump test |
| CN116221468A (en) * | 2023-03-09 | 2023-06-06 | 浙江三方控制阀股份有限公司 | Self-operated multistage rotary pressure reducing valve |
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Address after: 100076 Beijing, Fengtai District, South Road, No. 1, Applicant after: Beijing Inst. of Aerospace Dynamics Applicant after: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corporation Applicant after: SINOPEC Ningbo Engineering Company Limited Applicant after: SINOPEC Engineering (Group) Co., Ltd. Address before: 100076 Beijing, Fengtai District, South Road, No. 1, Applicant before: Beijing Inst. of Aerospace Dynamics Applicant before: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corp. Applicant before: SINOPEC Ningbo Engineering Company Limited Applicant before: SINOPEC Engineering (Group) Co., Ltd. |
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Application publication date: 20150325 |