CN101000113A - Middle and high pressure guiding type water pressure reducing valve - Google Patents
Middle and high pressure guiding type water pressure reducing valve Download PDFInfo
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- CN101000113A CN101000113A CN 200610125219 CN200610125219A CN101000113A CN 101000113 A CN101000113 A CN 101000113A CN 200610125219 CN200610125219 CN 200610125219 CN 200610125219 A CN200610125219 A CN 200610125219A CN 101000113 A CN101000113 A CN 101000113A
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Abstract
The invention is a medium- and high- pressure pilot water pressure reducing valve, mainly comprising main valve and pilot valve, where in the pilot valve is pilot valve seat, pilot valve core, pilot valve spring and regulating rod arranged in turn; the main valve body is made with water inlet and outlet, and internally equipped with valve sleeve, the valve sleeve is internally equipped with main valve core; and it is characterized in that: (1) when the pilot valve core cooperates with the pilot valve seat, two acute angle side-shaped orifices simultaneously play a throttling role; (2) the valve seat hole of the pilot valve seat is internally equipped with pilot valve damping plug screw; (3) the axis of the main valve core is made with connecting hole in which the main valve damping plug screw is arranged. On the premise of not increasing machining accuracy, it reduces valve leakage, improves gas corrosion resistance and pollution resistance, as well as stability, and can use sea and fresh water and other low viscosity fluids as working media.
Description
Technical field
The invention belongs to hydraulic transmission element, be specifically related to a kind of mesohigh pressure guiding type water pressure reducing valve, be applied in low viscosity fluids such as sea, fresh water and do in the Hydraulic Power Transmission System of medium.
Background technique
Directly have environmental protection, difficult combustion, outstanding advantage such as with low cost as the water hydraulic drive technology of working medium with sea, fresh water.Yet, because the corrosivity of water is strong, density is big, viscosity is little, pressure for vaporization is high, therefore, with traditional oil-pressure reducing valve directly with water as working medium have that leakage rate is big, problems such as serious, poor stability is corroded in cavitation erosion and wire drawing.If be used in befouling environment such as rivers ocean, the silt in the water also will produce serious erosion and scraping action to spool and valve seat, and silt enters the jam that also can cause spool between spool and the valve pocket simultaneously.
Have now and mainly constitute by pilot valve and main valve etc. with the DR type reduction valve of mineral oil as working medium.The main valve of this valve adopts slide-valve structure, the anticorrosive and cavitation erosion ability of material.As being working medium with water directly with this reduction valve, then exist leakage rate big, corrode and the problem such as serious that cavitates, thereby make the very fast inefficacy of this valve or at all can not use.Simultaneously, the sealing between spool and the valve pocket mainly guarantees by dwindling its gap, therefore the filter precision of medium required very highly, and for the situation that contains silt in marine pollution environment or the water, spool is stuck easily and causes the inefficacy of valve.In addition, because the water hammer when making the work medium with water is serious,, also there is the problem of poor stability as being working medium with water directly with this valve.
Summary of the invention
The present invention proposes a kind of mesohigh pressure guiding type water pressure reducing valve, at situations such as the low viscosity of aqueous medium, cavitation erosion wire drawing and compression shock are serious, from structural type and material selection aspect relative counter measures is proposed, overcome the leakage rate that existing piloted reducer exists big, corrode and the problem such as serious that cavitates.
The present invention proposes a kind of mesohigh pressure guiding type water pressure reducing valve, is connected to form by main valve and pilot valve, and pilot valve is a cone valve, and guide's valve seat, guide's spool, pilot valve spring and adjustable lever are housed in guide's valve body successively; Guide's valve seat axially has valve seat orifice, constitutes the pilot valve restriction with guide's spool; Main valve is a guiding valve, has water intake and water outlet on the valve body, and valve pocket is housed in the valve body, has the duct on the valve pocket and is communicated with valve body water intake and water outlet respectively, and valve pocket has aperture near the end of valve body water outlet; Main valve plug is housed in the valve pocket, and main valve plug and valve pocket pairing form friction pair, and constitute the main valve restriction; It is characterized in that: the end of (1) guide's valve seat has undercut groove, and its diameter when guide valve core cooperates with guide's valve seat in the ban, has two sharp edge shape restrictions simultaneously to play throttling action at the restriction position greater than the valve seat orifice diameter; (2) pilot valve damping plug screw is set in the valve seat orifice of guide's valve seat; (3) the main valve plug axis has intercommunicating pore, and the main damping valve plug screw is set in the intercommunicating pore.
Described mesohigh pressure guiding type water pressure reducing valve is characterized in that: the main valve plug two ends install combined seal ring respectively additional.
The present invention has taked the form of two-step throttle at pilot valve restriction place, prevent or weakened the generation of the cavitation erosion, wire drawing etc. at valve port place; The characteristics little at aqueous medium viscosity, that damping is little are provided with damping hole before the pilot valve import, reduced compression shock and the oscillation action of intake-outlet variation in pressure to main valve plug, have improved the stability of valve; Main valve has been taked the combining form of spool, valve seat and valve pocket, thereby is convenient to select different materials according to the gasproof erosion of different parts with the wire drawing erosiveness.Spool all improves hardness by heat treatment, thereby improves its anti-cavitation erosion ability.On main valve plug, install combination seal additional and enclose the auxiliary seal effect, substantially the wire drawing that has prevented the leakage in the micro gap between spool and the valve body and caused is thus corroded, requirement and processing cost have been reduced simultaneously to the valve machining accuracy, and because this gap increases, the stuck possibility of solid particle that spool is entered in the valve reduces, thereby has strengthened the contamination resistance of valve.
This valve reduces the leakage of valve under the condition of comparing the machining accuracy that does not significantly improve valve with oil pressure valve; Improve the gasproof erosion and the contamination resistance of valve; Improve the stability of valve simultaneously, can be with low viscosity fluids such as sea (light) water as working medium.Within its effective range of working pressure, at inlet pressure p
1Under the situation about changing, keep outlet pressure p
2Relatively stable.Under inlet pressure keeps constant situation, if change by the flow of valve, outlet pressure p
2Also will keep basicly stable.
Description of drawings
Fig. 1 is the embodiments of the invention structural representation;
Fig. 2 is a pilot valve restriction partial enlarged drawing.
Embodiment
Figure 1 shows that one embodiment of the present of invention, among the figure, valve body 1, exit seal circle 2, main damping valve plug screw 3, main valve plug 4, valve pocket seal ring 5, combined seal ring 6, valve pocket 7, spring seat 8, valve core seal ring 9, main spool spring 10, guide's valve body 11, screw plug 12, screw plug seal ring 13, bolt 14, compression spring 15, guide's valve seat 16, pilot valve damping plug screw 17, pilot valve body sealing ring 18, guide's spool 19, leakage hole seal ring 20, pilot valve spring 21, adjustable lever 22, adjustable lever seal ring 23, locking nut 24, regulating handle 25, drain tap 26, the right chamber 27 of main valve plug, main valve restriction 28, chamber 29, a main valve plug left side.
As shown in Figure 1, as an embodiment, the rated working pressure of this valve is 21MPa, and export pressure is 10～16MPa, and rated flow is 40L/min.Regulating handle 25, by compression pilot valve spring 21, the different cracking pressures that can regulate pilot valve, thus regulate the steady pressure that exports.Main valve plug 4 and valve pocket 7 pairings form friction pair, and constitute main valve restriction 28.Install combined seal ring 6 on the main valve plug 4 respectively additional.Main valve plug 4 centers have intercommunicating pore, and main damping valve plug screw 3 is set in intercommunicating pore.The main valve outlet pressure enters the right chamber 27 of main valve plug by this intercommunicating pore and main damping valve plug screw damping hole, makes the main valve two ends all act on pressure.The pressure medium that enters the right chamber 27 of main valve plug also acts on the pilot valve core by pilot valve damping plug screw 17 damping holes.
Inlet pressure p
1Pressure becomes outlet pressure p after 28 decompressions of main valve restriction
2Outlet pressure enters the left chamber of main valve plug 4 through the aperture of left end on the valve pocket 7, the intercommunicating pore at center and main damping valve plug screw 3 enter the right chamber 27 of main valve plug on main valve plug again, behind the pilot valve damping plug screw 17 in guide's valve seat 16, act on guide's spool 19.When outlet pressure was lower than set pressure, poppet port was closed, and did not have fluid to flow in the damping hole of main damping valve plug screw 3, the pressure at two ends, main valve plug 4 left and right sides equates that main valve is in the high order end position under the effect of the spring force of main spool spring 10, main valve restriction 28 standard-sized sheets, do not play decompression, p
2≈ p
1When outlet pressure surpassed set pressure, exit portion liquid flowed out through damping hole, poppet port, the drain tap 26 of pilot valve damping plug screw 17.The damping hole of main damping valve plug screw 3 has liquid to pass through, make the right chamber 27 of main valve plug chamber 29, a left side and main valve plug produce pressure reduction, when active force that this pressure reduction produced during greater than the compressive force of main spool spring 10, the power of surging and frictional force sum, main valve moves to right, restriction (pressure-reduction outlet) 28 is turned down, restriction loss increases, and is stabilized in a certain equilibrium position up to main valve plug, at this moment outlet pressure p
2Depend on the force value that the pilot valve spring is set up.
If inlet pressure p
1Raise, then outlet pressure p
2Also raise, main valve plug 4 moves to right, and restriction reduces, p
2Reduce again, main valve plug 4 is in balance on new position, and outlet pressure p
2Substantially remain unchanged; Vice versa.
Fig. 2 is a pilot valve restriction partial enlarged drawing, and therefore poppet port exists serious cavitation erosion and wire drawing phenomenon because the pressure reduction that bears is big, and the flow velocity of current is very high.In order to address this problem, take the two-step throttle structure at poppet port, promptly formerly the end of guide valve seat 16 except valve seat orifice, increase a undercut groove that diameter is bigger than valve seat orifice, thereby form two sharp edges at a throttling position, when guide valve core 19 is with 16 pairings of guide's valve seat in the ban, there are two sharp edge shape restrictions to play throttling action simultaneously at a throttling position.This structure passes through to reduce the flow velocity of poppet port, thereby reaches the effect that alleviates cavitation erosion and wire drawing erosion.Pilot valve damping plug screw 17 is set before the pilot valve import, has reached the purpose that has reduced the main valve plug shock oscillation.If there is not the damping hole of this pilot valve damping plug screw, then pilot valve throws open when outlet pressure reaches its set pressure, and the pressure reduction at main valve two ends increases suddenly, make it move right fast, the restriction flow area that reduces to reduce pressure, the pressure loss increases, and outlet pressure reduces, pilot valve is closed suddenly again, main valve plug again toward left movement, increases the decompression restriction under the effect of spring, make outlet pressure rise again.So repeatedly, main valve will be in the state of reciprocating vibration, cause the outlet pressure of valve extremely unstable.After before the pilot valve import, increasing damping hole, will make when outlet pressure reaches its pilot valve set pressure that the main valve motion is unlikely to too fast, thereby avoids its vibration in valve pocket.
Claims (2)
1. a mesohigh pressure guiding type water pressure reducing valve is connected to form by main valve and pilot valve, and pilot valve is a cone valve, and guide's valve seat, guide's spool, pilot valve spring and adjustable lever are housed in guide's valve body successively; Guide's valve seat axially has valve seat orifice, constitutes the pilot valve restriction with guide's spool; Main valve is a guiding valve, has water intake and water outlet on the valve body, and valve pocket is housed in the valve body, has the duct on the valve pocket and is communicated with valve body water intake and water outlet respectively, and valve pocket has aperture near the end of valve body water outlet; Main valve plug is housed in the valve pocket, and main valve plug and valve pocket pairing form friction pair, and constitute the main valve restriction; It is characterized in that: the end of (1) guide's valve seat has undercut groove, and its diameter when guide valve core cooperates with guide's valve seat in the ban, has two sharp edge shape restrictions simultaneously to play throttling action at the restriction position greater than the valve seat orifice diameter; (2) pilot valve damping plug screw is set in the valve seat orifice of guide's valve seat; (3) the main valve plug axis has intercommunicating pore, and the main damping valve plug screw is set in the intercommunicating pore.
2. mesohigh pressure guiding type water pressure reducing valve as claimed in claim 1 is characterized in that: the main valve plug two ends install combined seal ring respectively additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610125219XA CN101000113B (en) | 2006-12-01 | 2006-12-01 | Middle and high pressure guiding type water pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610125219XA CN101000113B (en) | 2006-12-01 | 2006-12-01 | Middle and high pressure guiding type water pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000113A true CN101000113A (en) | 2007-07-18 |
| CN101000113B CN101000113B (en) | 2010-11-03 |
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ID=38692197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610125219XA Expired - Fee Related CN101000113B (en) | 2006-12-01 | 2006-12-01 | Middle and high pressure guiding type water pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101000113B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121487A (en) * | 2011-03-04 | 2011-07-13 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN102269275A (en) * | 2011-02-24 | 2011-12-07 | 淄博市博山防爆电器厂有限公司 | High-pressure check valve |
| CN102537445A (en) * | 2011-10-10 | 2012-07-04 | 张周卫 | Control safety valve for LNG (liquefied natural gas) low-temperature process |
| CN103122880A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Adjustable pilot reducing valve |
| CN103697184A (en) * | 2013-12-20 | 2014-04-02 | 中国北方车辆研究所 | Through-flow structure for sliding valve port |
| CN104061351A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Adjustable-pressure pilot-operated type pressure reducing valve |
| CN104196794A (en) * | 2014-07-31 | 2014-12-10 | 红安安达新材料有限责任公司 | Pressure reducing valve |
| CN104500822A (en) * | 2014-12-26 | 2015-04-08 | 四川欧迅能源工程科技有限公司 | High-voltage electric stop valve with valve element stress balance |
| CN107308581A (en) * | 2017-08-23 | 2017-11-03 | 中国五洲工程设计集团有限公司 | Topical application type drives the valve that drenches with rain soon |
| CN109709359A (en) * | 2019-02-25 | 2019-05-03 | 深圳供电局有限公司 | Adaptor, GIS equipment test connector and GIS equipment |
| CN110748528A (en) * | 2019-10-28 | 2020-02-04 | 黄洪刚 | Control valve for oil cylinder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200110U (en) * | 1988-01-15 | 1988-10-19 | 航天工业部第十一研究所 | Pilot bellows type relief valve |
| DE10345712A1 (en) * | 2003-10-01 | 2005-04-21 | Bosch Rexroth Ag | Pressure feed |
| CN2786391Y (en) * | 2004-12-17 | 2006-06-07 | 上海华岛液压设备制造有限公司 | Pilot-operated overflow valve |
| CN200982450Y (en) * | 2006-12-01 | 2007-11-28 | 华中科技大学 | Middle and high pressure pilot type water pressure relief valve |
-
2006
- 2006-12-01 CN CN200610125219XA patent/CN101000113B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269275A (en) * | 2011-02-24 | 2011-12-07 | 淄博市博山防爆电器厂有限公司 | High-pressure check valve |
| CN102121487B (en) * | 2011-03-04 | 2013-07-24 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN102121487A (en) * | 2011-03-04 | 2011-07-13 | 华中科技大学 | Pilot-operated type water hydraulic pressure digital proportional direction valve |
| CN102537445A (en) * | 2011-10-10 | 2012-07-04 | 张周卫 | Control safety valve for LNG (liquefied natural gas) low-temperature process |
| CN102537445B (en) * | 2011-10-10 | 2013-10-30 | 张周卫 | Control safety valve for LNG (liquefied natural gas) low-temperature process |
| CN103122880B (en) * | 2011-11-18 | 2016-05-04 | 广西柳工机械股份有限公司 | Adjustable pilot-operated pressure-reducing valve |
| CN103122880A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Adjustable pilot reducing valve |
| CN103697184A (en) * | 2013-12-20 | 2014-04-02 | 中国北方车辆研究所 | Through-flow structure for sliding valve port |
| CN104061351A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Adjustable-pressure pilot-operated type pressure reducing valve |
| CN104196794A (en) * | 2014-07-31 | 2014-12-10 | 红安安达新材料有限责任公司 | Pressure reducing valve |
| CN104500822A (en) * | 2014-12-26 | 2015-04-08 | 四川欧迅能源工程科技有限公司 | High-voltage electric stop valve with valve element stress balance |
| CN107308581A (en) * | 2017-08-23 | 2017-11-03 | 中国五洲工程设计集团有限公司 | Topical application type drives the valve that drenches with rain soon |
| CN109709359A (en) * | 2019-02-25 | 2019-05-03 | 深圳供电局有限公司 | Adaptor, GIS equipment test connector and GIS equipment |
| CN110748528A (en) * | 2019-10-28 | 2020-02-04 | 黄洪刚 | Control valve for oil cylinder |
| CN110748528B (en) * | 2019-10-28 | 2021-05-14 | 杭州青流液压设备制造有限公司 | Control valve for oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101000113B (en) | 2010-11-03 |
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Granted publication date: 20101103 Termination date: 20191201 |