CN101140032A - Flash evaporation prevention valve - Google Patents
Flash evaporation prevention valve Download PDFInfo
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- CN101140032A CN101140032A CNA2006101268130A CN200610126813A CN101140032A CN 101140032 A CN101140032 A CN 101140032A CN A2006101268130 A CNA2006101268130 A CN A2006101268130A CN 200610126813 A CN200610126813 A CN 200610126813A CN 101140032 A CN101140032 A CN 101140032A
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- valve
- flash evaporation
- sleeve
- flash distillation
- flash
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Abstract
The invention belongs to a valve, in particular relates to an anti-flash evaporation valve, which is characterized in that: the anti-flash evaporation structure of the valve is composed of at least two layers of sleeves arranged between a valve clack and a valve body. The circumferential walls of the inner and outer sleeves are respectively opened with a throttle window, and the arrangement between the inner and outer sleeves is mutually staggered at a certain angle. The invention has the advantages that: the processing assembly technology of the sleeve is much simpler than the existing labyrinth anti-flash evaporation structure, and the pressure reducing effect and the anti-flash evaporation capacity are much stronger than the foreign multi-layer sleeve anti-flash evaporation structure and are basically equal to the labyrinth anti-flash evaporation structure. Therefore the invention can be widely used in the places which have high differential pressure and easily generate the flash evaporation and cavitation erosion in order to protect valves, pipelines and other equipments.
Description
Technical field
The invention belongs to valve, be specifically related to a kind of improvement of anti-flash distillation structure of flash evaporation prevention valve.
Background technique
When liquid medium by valve, when its outlet pressure was equal to or less than the vapour tension of liquid, the operative liquid medium can become steam, and the medium velocity by valve is continued to increase, until producing choked flow.This choked flow can reduce the negotiability of valve on the one hand because steams a large amount of in the medium exists, on the other hand, it is high-speed that the speed of the drop in the high-speed choked flow can trend towards steam, the surface of droplet impact valve internal material, thereby make material damage and come off, simultaneously, this flash distillation also can cause too high noise and produce vibration, thereby destroy pipeline and other equipment.
At present, existing abroad multiple anti-flash distillation structure has mazy type (as Fig. 6), and the telescopic structures such as (as Fig. 7) of multilayer is arranged.Mazy type is that the runner that medium passes through is designed to complicated winding raod line, make medium that pressure loss pressure drop all be arranged when turning round by each,, satisfied technological requirement though total pressure drop is bigger, but each grade pressure drop is all less than the critical pressure differential that produces flash distillation, thereby avoided the generation flash distillation.The foreign patent multilayer is telescopic to be that a lot of layers of sleeve are superimposed, all have a large amount of throttling pore on each layer sleeve, and the adjacent layer sleeve rotates a certain angle when installing, make medium when one deck sleeve flows to next layer sleeve, produce a pressure drop, the same with mazy type, each grade pressure drop is all less than the critical pressure differential that produces flash distillation, thereby avoided the generation flash distillation.
But two kinds of patented technologies of external this all have shortcoming:
1. though effectively step-down of mazy type, but the processing technology complexity, complicated tortuous passage curve must could obtain by special process, and in order to reach traffic requirement, usually need the combination of a plurality of discs, the fixing of this disc combination also needs special process.So its shortcoming is that manufacturing process is too complicated.
2. the telescopic advantage of multilayer is that structure is simpler, the processing of part is all more or less freely, but how to guarantee when installing that rotating suitable angle between layer and the layer is a difficult problem, rely on manual operation that final effect is had a greatly reduced quality, and, its antihypertensive effect is not fine, is not suitable for the occasion of High Pressure Difference.
Summary of the invention
The purpose of this invention is to provide a kind of novel existing good anufacturability, flash evaporation prevention valve that again can effective multistage step-down.
The present invention is achieved in that a kind of flash evaporation prevention valve, it comprises valve body and valve gap, valve seat, flap, valve rod and anti-flash distillation structure are installed in valve body, wherein, said anti-flash distillation structure is made up of the two-layer at least sleeve that is arranged between flap and the valve body, and on the peripheral wall of every layer of sleeve, all having the throttling window, the several angle that staggers each other between the adjacent layer sleeve is installed.
Remarkable advantage of the present invention is that processing, the assembly technology of sleeve wants much simple for the anti-flash distillation structure of mazy type; and its antihypertensive effect and anti-flash distillation ability are eager to excel in whatever one does more many than external multilayer sleeve; basic suitable with mazy type; has multistage antihypertensive effect; produce flash distillation and cavitation erosion when avoiding liquid medium to pass through valve; thereby guarantee the negotiability of valve, avoid the damage of material, and protection pipeline and other equipment.
Description of drawings
Fig. 1 is a flash evaporation prevention valve structural representation provided by the present invention;
Fig. 2 is the tube-in-tube structure schematic representation with uniform sleeve configuration throttling window;
Fig. 3 is the tube-in-tube structure schematic representation with throttling pore of regular distribution;
Fig. 4 uses to install for inner and outer sleeves and forms anti-flash distillation structural representation;
Fig. 5 moves towards schematic diagram for fluid;
Fig. 6 is the anti-flash distillation structural representation of foreign patent mazy type;
Fig. 7 is the telescopic anti-flash distillation structural representation of foreign patent multilayer.
Among the figure, 1 valve body, 2 valve seat pads, 3 valve seats, 4 flaps, 5 valve rods, 6 inner sleeves, 7 outer sleeves, 8 bonnet gaskets, 9 valve gaps, 10/11 valve gap bolt/nut, 12 fillers, 13 glands, 14 pressing plates, 15/16 filler bolt/nut.
Embodiment
As shown in Figure 1, a kind of flash evaporation prevention valve, it comprises valve body 1 and valve gap 9, valve seat 3, flap 4, valve rod 5 and anti-flash distillation structure are installed in valve body 1, said anti-flash distillation structure is made up of the two-layer at least sleeve that is arranged between flap 4 and the valve body 1, and on the peripheral wall of every layer of sleeve, all having the throttling window, the several angle that staggers each other between the adjacent layer sleeve is installed.
Sleeve in the present embodiment has only 2 layers to be inner sleeve 6 and outer sleeve 7, in actual applications, need as operating mode, can be designed to 3 layers or more multi-layered sleeve, between sleeve and the sleeve certain clearance be arranged, make fluid in the gap, collide, collaborate, shunt, after reducing, pressure flows to one deck sleeve down again, reduce to until outlet till the pressure of technological requirement, and each grade pressure drop is all less than the critical pressure that produces flash distillation, thereby avoided the generation of flash distillation.
The throttling window of inner and outer sleeves has two kinds to open method, respectively as shown in Figures 2 and 3.Sleeve shown in Figure 2 is to be processed with a lot of uniform sleeve configuration throttling windows on the peripheral wall of sleeve, and sleeve shown in Figure 3 is the throttling pore that is processed with a large amount of regular distributions on the peripheral wall of sleeve.
In, outer sleeve is installed by shown in Figure 4, in making, outer two-layer sleeve certain angle that staggers, like this, when fluid enters one deck sleeve at the throttle orifice by one deck sleeve, at first collide down on the wall of one deck sleeve, fluid turns round and shunts to both direction then, this fluid collides on the wall, and the branch that the turns round loss part energy that fails to be convened for lack of a quorum, speed reduces, produce a pressure drop, near the restriction of following one deck sleeve, liquidate with another fluid streams, converge, turning round then spills out from the throttle orifice of the following sleeve of one deck, the this of fluid liquidates, converge, and turn round and also can make the fluid loss part energy, speed reduces, and produces a pressure drop, thereby upstream pressure is dropped to the downstream pressure of technological requirement, but each grade pressure drop all is less than the critical pressure differential that produces flash distillation, thereby has avoided flash distillation.Fluid move towards principle as shown in Figure 5.
The present invention runs foul of each other in the gap, collaborates, shunts after making fluid flow through sleeve, after the pressure loss, and next sleeve of flowing through, each grade pressure drop is less than the critical pressure that produces flash distillation, thereby avoided the generation of flash distillation.By it is carried out hot aqueous medium's Work condition analogue, it has good anti-flash distillation function.And, in the examination at user scene, prove the generation that it can effectively avoid flash distillation by being applied in the product.Can be applicable to the High Pressure Difference occasion, be easy to generate the occasion of flash distillation, in case the fluid stopping body produces flash distillation by valve.
In addition, the generation of cavitation erosion is a fluid by valve the time, and pressure is reduced to below the vapour tension of liquid, produces steam in the liquid, and then, pressure returns to again more than the vapour tension, and these have cavity (bubble) extruding of steam to break and revert to liquid condition.When outlet pressure is lower than the vapour tension of liquid, then be flash distillation.So according to identical principle, the present invention also can effectively avoid medium to produce cavitation erosion by valve, the protection valve material is not damaged, reduces noise and vibration, protection pipeline and other equipment.
Claims (4)
1. flash evaporation prevention valve, it comprises valve body (1) and valve gap (9), valve seat (3), flap (4), valve rod (5) and anti-flash distillation structure are installed in valve body (1), it is characterized in that: said anti-flash distillation structure is made up of the two-layer at least sleeve that is arranged between flap (4) and the valve body (1), and on the peripheral wall of every layer of sleeve, all having the throttling window, the several angle that staggers each other between the adjacent layer sleeve is installed.
2. according to the said a kind of flash evaporation prevention valve of claim 1, it is characterized in that: said anti-flash distillation structure is made up of the inner sleeve (6) and the outer sleeve (7) that are arranged between flap (4) and the valve body (1).
3. according to claim 1 or 2 said a kind of flash evaporation prevention valves, it is characterized in that: said throttling window is uniform sleeve configuration throttling window.
4. according to claim 1 or 2 said a kind of flash evaporation prevention valves, it is characterized in that: said throttling window is the throttling pore of regular distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101268130A CN101140032A (en) | 2006-09-05 | 2006-09-05 | Flash evaporation prevention valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101268130A CN101140032A (en) | 2006-09-05 | 2006-09-05 | Flash evaporation prevention valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101140032A true CN101140032A (en) | 2008-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101268130A Pending CN101140032A (en) | 2006-09-05 | 2006-09-05 | Flash evaporation prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101140032A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956869A (en) * | 2010-10-11 | 2011-01-26 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN103821979A (en) * | 2014-02-25 | 2014-05-28 | 杭州杭氧工装泵阀有限公司 | Multistage depressurization valve |
| CN107218437A (en) * | 2016-03-21 | 2017-09-29 | 费希尔控制产品国际有限公司 | With fluid passage with the cage device for the flow behavior for influenceing valve |
| CN107747631A (en) * | 2017-11-22 | 2018-03-02 | 上海核阀门股份有限公司 | Jet tube high pressure flash valve |
| CN111828704A (en) * | 2020-08-05 | 2020-10-27 | 江苏科技大学 | Cavitation-proof valve body structure |
| CN115393316A (en) * | 2022-08-24 | 2022-11-25 | 维都利阀门有限公司 | Flash valve with erosion state monitoring system and monitoring method thereof |
-
2006
- 2006-09-05 CN CNA2006101268130A patent/CN101140032A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956869A (en) * | 2010-10-11 | 2011-01-26 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN103821979A (en) * | 2014-02-25 | 2014-05-28 | 杭州杭氧工装泵阀有限公司 | Multistage depressurization valve |
| CN107218437A (en) * | 2016-03-21 | 2017-09-29 | 费希尔控制产品国际有限公司 | With fluid passage with the cage device for the flow behavior for influenceing valve |
| CN107747631A (en) * | 2017-11-22 | 2018-03-02 | 上海核阀门股份有限公司 | Jet tube high pressure flash valve |
| CN111828704A (en) * | 2020-08-05 | 2020-10-27 | 江苏科技大学 | Cavitation-proof valve body structure |
| CN111828704B (en) * | 2020-08-05 | 2022-04-15 | 江苏科技大学 | Cavitation-proof valve body structure |
| CN115393316A (en) * | 2022-08-24 | 2022-11-25 | 维都利阀门有限公司 | Flash valve with erosion state monitoring system and monitoring method thereof |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |