CN103644326A - Two-stage buffer type anti-water-hammer coaxial valve - Google Patents
Two-stage buffer type anti-water-hammer coaxial valve Download PDFInfo
- Publication number
- CN103644326A CN103644326A CN201310604145.8A CN201310604145A CN103644326A CN 103644326 A CN103644326 A CN 103644326A CN 201310604145 A CN201310604145 A CN 201310604145A CN 103644326 A CN103644326 A CN 103644326A
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- China
- Prior art keywords
- cylinder
- right cylinder
- valve
- spool
- piston
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
- F16K31/1245—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one valve
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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
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a two-stage buffer type anti-water-hammer coaxial valve. A left bushing is arranged between a left end cover and a left cylinder, an intermediate cylinder cover is arranged between the left cylinder and a right cylinder, a right bushing is arranged between a right cylinder cover and the right cylinder, and seal rings are embedded in the insides of the left bushing and the right bushing. A left piston capable of sliding freely is arranged in the left cylinder, the cavity of the left cylinder is divided into a first left cavity and a first right cavity by the left piston, and a valve spool penetrates the left cylinder and the right cylinder and is integrated with a right cylinder piston. The cavity of the right cylinder is divided into a second left cavity and a second right cavity by the right cylinder piston, two air inlets are formed in one side of the left cylinder and the right cylinder respectively, a pilot valve is fixed on the outside of the left cylinder through screws, a pilot valve is fixed on the outside of the right cylinder through screws, and air control ports are formed in the pilot valves. The valve has the advantages that actions of the pistons are controlled by the different air inlet sequence, and accordingly, two-stage actions of the valve spool are achieved, closed impacting caused by fluid columns during instantaneous opening and closing of the valve spool is prevented, and the closed water hammer is eliminated fundamentally.
Description
Technical field
The present invention relates to valve body technical field, be specifically related to a kind of two stage buffering type water hammer-resistant coaxial valve instrument.
Background technique
Coaxial valve is a kind of stop valve of fluid Control Engineering, applies very extensive.It adopts the fluid course mode coaxial with pipeline, at utmost reduces the pressure loss, reduces resistance.Tradition stop valve spool closing velocity is very fast, and generally, stop valve is arranged on the pipeline that pump discharge end connects, and from pump discharge end close to, when stop valve is closed rapidly, the unexpected variation of pressure may directly damage pump.Pipe-line system is used maximum stop valves to be generally ball valve, angle pedestal valve at present.When valve is closed at short notice, in pipeline, will there is water hammer, water hammer ripple acts directly on stop valve, can cause the damage of valve when serious.Water hammer accident and stop valve lost efficacy and were conventionally coupled.The too fast keying of stop valve can cause water hammer to destroy stop valve, thereby in pipeline, causes chain reaction, and more fluidic component (comprising other control valves) is impaired, makes accident upgrading; No matter this vicious circle starts in which link, and its result is all serious.
Existing stop valve, no matter be ball formula, angle seat formula, or oblique dish formula stop valve, they have a common feature when opening and closing, in unlatching or closing process, spool, all the time in accelerating process, makes spool stop front excessive velocities, the immediate cause that Here it is causes stop valve water hammer and flap to clash into.In order to solve stop valve water hammer and flap Impact Problems, several solutions have been there are, a kind of is transformation of facility scheme such as air pressure container, unidirectional extra feed tank, surge tower, air valve etc., these transformation advantages are to utilize additional structure to occur that at any time pressure surge is all inhaled in time, shortcoming is to take up an area greatly, complex structure, maintenance cost is high.A kind of is Plant reconstruction plant modernization scheme such as quiet stop valve, the stop valve that liquidates, water hammer-resistant ball check valve etc.It is that the move distance of valve plate is short that quiet stop valve is closed reason that sound is little, but can not eliminate water hammer; In fact opposite-flushing type stop valve belongs to waterpower damped type stop valve; Ball check valve water hammer-resistant effect is better, but structure is too complicated, and sealing surface is too much, and manufacturing expense is high.
Summary of the invention
The object of the invention is to defect and deficiency for prior art, a kind of two stage buffering type water hammer-resistant coaxial valve instrument are provided.
For achieving the above object, the technical solution used in the present invention is:
A kind of two stage buffering type water hammer-resistant coaxial valves of the present invention, in between left cylinder cap and left cylinder, establish left lining, between left cylinder and right cylinder body, establish middle cylinder cap, between right cylinder cap and right cylinder body, establish right lining, left lining, embedding sealing circle inside right lining, the in-built left piston that can be free to slide of left cylinder, left piston is divided into two-part left cylinder inner chamber, Yi Jiyou chamber, left chamber one, spool connects left cylinder and right cylinder body, spool and right cylinder piston are integrated design, right cylinder piston is divided into two-part by right inner chamber of cylinder block, Er Jiyou chamber, left chamber two, left cylinder and right cylinder body one side set up 2 inlet holes separately, left cylinder outside is adopted and is screwed pilot valve, right cylinder body outside is adopted and is screwed pilot valve, pilot valve is provided with gas control mouth, connect external control gas.
As preferably, the air outlet hole of described pilot valve is corresponding inlet hole respectively.
As preferably, described spool spool is built in cylinder body, and pipeline and fluid course are at coaxial line.
As preferably, in described right cylinder cap, be provided with sealing seat, sealing seat is provided with sealing gasket, and spool right side contacts completely with sealing gasket.
As preferably, described whole main valve body adopts double-screw bolt, bullet pad, cover type nut to connect.
As preferably, described pilot valve exhaust place is provided with throttling muffler.
Adopt after said structure, beneficial effect of the present invention is: two stage buffering type water hammer-resistant coaxial valves, according to different air inlet orders, the action of control piston, thereby realize the two stage action of spool, when avoiding opening in spool wink, closing in wink, fluid column causes makes shock up, fundamentally eliminates and makes water hammer up.
Accompanying drawing explanation
In order to be illustrated more clearly in technological scheme of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention.
In figure: 1, spool, 2, left cylinder cap, 3, left lining, 4, left block, 5, left cylinder, 6, left piston, 7-1, pilot valve one, 7-2, pilot valve two, 8, right block, 9, middle cylinder cap, 10, right cylinder body, 11, right lining, 12, right cylinder cap, 13, sealing gasket, 14, sealing seat, 15, inlet hole.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, a kind of two stage buffering type water hammer-resistant coaxial valves, in between left cylinder cap 2 and left cylinder 5, establish left lining 3, between left cylinder 5 and right cylinder body 10, establish middle cylinder cap 9, between right cylinder cap 12 and right cylinder body 10, establish right lining 11, left lining 3, right lining 11 inner side embedding sealing circles, the in-built left piston that can be free to slide 6 of left cylinder 5, left piston 6 is divided into two-part left cylinder 5 inner chambers, Ji You chamber, left chamber, spool 1 connects left cylinder 5 and right cylinder body 10, spool 1 is integrated design with right cylinder piston, right cylinder piston is divided into two-part by right cylinder body 10 inner chambers, Ji You chamber, left chamber, left cylinder 5 and right cylinder body 10 1 sides set up 2 inlet holes separately, left cylinder outside is adopted and is screwed pilot valve one 7-1, right cylinder body outside is adopted and is screwed pilot valve two 7-2, pilot valve 7-1, 7-2 is provided with gas control mouth, connect external control gas.
Closing process: initial spool is in enable possition, fluid enters valve body by left cylinder cap 2 imports, through the inner sealing seat 14 that flows into of spool 1, through sealing seat 14 through flow holes, flow out right cylinder cap 12, pilot valve 7-1, 7-2 connects respectively external control gas, pilot valve one 7-1 gas control pressure must be greater than pilot valve two 7-2 gas control pressure, meanwhile, left cylinder 5 right chamber air inlet, left piston 6 slides left, right cylinder body 10 left chamber air inlet, spool 1 drives the action to the right together of left block 4, when left block 4 contact left piston 6 left sides, right side, spool 1 action stops, right block 8 plays position-limiting action, main valve is realized the first stage and is closed, distance between spool right-hand member end face and sealing gasket reduces, rate of flow of fluid reduces, by the fluid flow in runner, reduce, pilot valve one 7-1 obtains electric commutation, left cylinder 5 left chamber air inlet, and left piston 6 slides to the right, extremely in contact, cylinder cap 9 left sides stop, and spool 1 continues action to the right, to spool 1 right side press seal pad 13, fluid is enclosed in spool 1, realizes main valve second stage and closes.
Opening process: connect above-mentioned condition, pilot valve one 7-1 obtains electric commutation, left piston 6 moves left, left piston 6 drives left block 3 to move left, spool 1 and its action left simultaneously, to left piston 6 contact left lining 3 right sides, stop, spool is realized the first stage and is opened, the fluid being enclosed in spool 1 flows out right cylinder cap 12 by sealing seat through flow hole, pilot valve two 7-2 obtain electric commutation, right cylinder body 10 right chamber air inlet, promote spool 1 and continue action left, in contacting to right piston left side, cylinder cap 9 right sides stop, spool 1 is opened completely, spool 1 inner fluid full flow flows out valve body by seal face.Continuation has been moved and has been opened and closed circulation, and the present invention, by controlling the stage action of spool, controls rate of flow of fluid, and when inhibition is opened in spool wink or wink closes, current are overrun, and prevent that water column from making shock up, fundamentally eliminate and make water hammer up.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. a stage buffering type water hammer-resistant coaxial valve, it is characterized in that: between left cylinder cap (2) and left cylinder (5), establish left lining (3), between left cylinder (5) and right cylinder body (10), establish middle cylinder cap (9), between right cylinder cap (12) and right cylinder body (10), establish right lining (11), left lining (3), right lining (11) inner side embedding sealing circle, the in-built left piston that can be free to slide of left cylinder (5) (6), left piston (6) is divided into two-part left cylinder (5) inner chamber, Yi Jiyou chamber, left chamber one, spool (1) connects left cylinder (5) and right cylinder body (10), spool (1) is integrated design with right cylinder piston, right cylinder piston is divided into two-part by right cylinder body (10) inner chamber, Er Jiyou chamber, left chamber two, left cylinder (5) and right cylinder body (10) one sides set up 2 inlet holes (15) separately, left cylinder (5) outside is adopted and is screwed pilot valve one (7-1), right cylinder body (10) outside is adopted and is screwed pilot valve two (7-2), pilot valve (7-1), (7-2) be provided with gas control mouth, connect external control gas.
2. a kind of two stage buffering type water hammer-resistant coaxial valves according to claim 1, is characterized in that: the air outlet hole of described pilot valve (7-1), (7-2) is corresponding inlet hole (15) respectively.
3. a kind of two stage buffering type water hammer-resistant coaxial valves according to claim 1, is characterized in that: described spool spool (1) is built in cylinder body, and pipeline and fluid course are at coaxial line.
4. a kind of two stage buffering type water hammer-resistant coaxial valves according to claim 1, it is characterized in that: in described right cylinder cap (12), be provided with sealing seat (14), sealing seat (14) is provided with sealing gasket (13), and spool (1) right side contacts completely with sealing gasket (13).
5. a kind of two stage buffering type water hammer-resistant coaxial valves according to claim 1, is characterized in that: described whole main valve body adopts double-screw bolt, bullet pad, cover type nut to connect.
6. a kind of two stage buffering type water hammer-resistant coaxial valves according to claim 2, is characterized in that: described (7-1), exhaust place of (7-2) pilot valve are provided with throttling muffler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310604145.8A CN103644326B (en) | 2013-11-25 | 2013-11-25 | A kind of two benches buffering type water hammer-resistant coaxial valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310604145.8A CN103644326B (en) | 2013-11-25 | 2013-11-25 | A kind of two benches buffering type water hammer-resistant coaxial valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103644326A true CN103644326A (en) | 2014-03-19 |
| CN103644326B CN103644326B (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310604145.8A Active CN103644326B (en) | 2013-11-25 | 2013-11-25 | A kind of two benches buffering type water hammer-resistant coaxial valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103644326B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163104A (en) * | 2018-10-30 | 2019-01-08 | 大连元利流体技术有限公司 | Saturated vapor valve |
| CN114072604A (en) * | 2019-02-18 | 2022-02-18 | 自动开关公司 | Coaxial valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19901253A1 (en) * | 1999-01-15 | 2000-07-20 | Aws Apparatebau Arnold Gmbh | Coaxial valve with housing body and extruded section, has few parts and simple construction |
| US20010011715A1 (en) * | 1999-12-15 | 2001-08-09 | Martin Roth | Coaxial valve with electric actuating drive |
| EP1408262A1 (en) * | 2002-10-09 | 2004-04-14 | müller co-ax ag | Coaxial valve with damper |
| DE10247098A1 (en) * | 2002-10-09 | 2004-04-22 | müller co-ax ag | Control tube for coaxial valve is made in one piece with valve body, which is conical and is narrower at its base than tube |
| US20070007476A1 (en) * | 2005-06-21 | 2007-01-11 | Eads Space Transportation Gmbh | Coaxial valve |
| US20120012766A1 (en) * | 2007-08-10 | 2012-01-19 | Astrium Gmbh | Coaxial valve with an electric drive |
| CN202501078U (en) * | 2012-03-08 | 2012-10-24 | 大连元利流体技术有限公司 | Pneumatic coaxial valve |
| CN202561124U (en) * | 2012-05-23 | 2012-11-28 | 广东省肇庆方大气动有限公司 | Dual pilot-type electric control reversing valve |
-
2013
- 2013-11-25 CN CN201310604145.8A patent/CN103644326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19901253A1 (en) * | 1999-01-15 | 2000-07-20 | Aws Apparatebau Arnold Gmbh | Coaxial valve with housing body and extruded section, has few parts and simple construction |
| US20010011715A1 (en) * | 1999-12-15 | 2001-08-09 | Martin Roth | Coaxial valve with electric actuating drive |
| EP1408262A1 (en) * | 2002-10-09 | 2004-04-14 | müller co-ax ag | Coaxial valve with damper |
| DE10247098A1 (en) * | 2002-10-09 | 2004-04-22 | müller co-ax ag | Control tube for coaxial valve is made in one piece with valve body, which is conical and is narrower at its base than tube |
| US20070007476A1 (en) * | 2005-06-21 | 2007-01-11 | Eads Space Transportation Gmbh | Coaxial valve |
| US20120012766A1 (en) * | 2007-08-10 | 2012-01-19 | Astrium Gmbh | Coaxial valve with an electric drive |
| CN202501078U (en) * | 2012-03-08 | 2012-10-24 | 大连元利流体技术有限公司 | Pneumatic coaxial valve |
| CN202561124U (en) * | 2012-05-23 | 2012-11-28 | 广东省肇庆方大气动有限公司 | Dual pilot-type electric control reversing valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163104A (en) * | 2018-10-30 | 2019-01-08 | 大连元利流体技术有限公司 | Saturated vapor valve |
| CN114072604A (en) * | 2019-02-18 | 2022-02-18 | 自动开关公司 | Coaxial valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103644326B (en) | 2015-12-02 |
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