CN102628523A - Pilot type control valve - Google Patents
Pilot type control valve Download PDFInfo
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- CN102628523A CN102628523A CN2012101229625A CN201210122962A CN102628523A CN 102628523 A CN102628523 A CN 102628523A CN 2012101229625 A CN2012101229625 A CN 2012101229625A CN 201210122962 A CN201210122962 A CN 201210122962A CN 102628523 A CN102628523 A CN 102628523A
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- valve
- spool
- small
- valve core
- valve rod
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Abstract
The invention provides a pilot type control valve which belongs to the field of mechanical technology and solves the problem that the existing pilot type safety valve is not applicable to a control valve. The pilot type control valve comprises a valve body, a valve core, a valve rod and a handle. The valve core is located inside the valve body and an inner end of the valve rod is connected with the valve core. An outer end of the valve rod extends out of the valve body to be connected with the handle. The valve core with a cylindrical shape is sheathed on the valve rod. The valve rod is provided with a nut and a small valve core, wherein the nut can abut against a bottom port of the valve core and the small valve core can abut against a top port of the valve core. The valve core is located between the nut and the small valve core and can move between them. There is a channel for fluid medium to pass through between the valve core and the valve rod. There is a sealing structure which can realize a seal between the small valve core and the top port of the valve core when the small valve core and the top port of the valve core contact each other. The pilot type control valve has the advantages of smooth opening, simple operationand the like.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of valve, particularly a kind of leading type modulating valve.
Background technique
Behind the valve closing, during pressure reduction reaches capacity before and after the valve high pressure, the unlatching torsion of valve can be very big.That is to say that handwheel rotates and receives bigger resistance during Open valve, the operator can not be smooth and easy fast with valve opening.
To the problems referred to above, its publication number of Chinese patent CN2037419U provide a kind of " Pilot operated safety valve ", and it is that major component is formed Pilot operated safety valve with main valve and pilot valve.Effect has main spool spring and main valve pressure chamber, pilot valve to have to import spool and the double spool valve of deriving spool on the main valve flap.When leakage failure taking place in the main valve pressure chamber, it does not lose automatic unlatching and automatic closing function.Its Blowdown of a safety valve is little, and switching motion is sensitive reliable, and good seal performance obtains bigger Lift easily.But it is mainly used in pressure system superpressure preventing safety relief, and it can not be suitable for for modulating valve.
Existing other modulating valve also all exists similar problem.
Summary of the invention
The objective of the invention is the problems referred to above, a kind of leading type modulating valve smooth and easy, simple in structure of opening is provided to the existing technology existence.
The object of the invention can be realized through following technical proposal: a kind of leading type modulating valve; Comprise valve body, spool, valve rod and handle; Said spool is positioned at valve body and valve rod is inner and spool links; Said valve rod outer end stretches out valve body and handle links, and it is characterized in that, said spool is tubular and is enclosed within on the valve rod; Have nut that can be resisted against spool bottom port place and the small valve core that can be resisted against spool top port place on the said valve rod; Said spool between nut and small valve core and it can move between the two above-mentioned, have the passage that supplies flowing medium to pass through between said spool and the valve rod, have between said small valve core and the spool top port when both contact and can realize the sealing configuration that seals.
During this modulating valve closed condition, form sealing between spool and the valve body, meanwhile, small valve core is resisted against spool top port place and passes through sealing configuration with the spool port sealing.
Valve rod at first drives on the small valve core and moves during Open valve, and small valve core is moved by the spool port, and at this moment, the passage of sub-fraction flowing medium between spool and valve rod gets into outlet end by the entrance point of valve body.
After moving to a certain degree on the small valve core, nut is resisted against spool bottom port place, drives spool one the same moving through nut, makes spool break away from the sealing surface place of valve body.A large amount of flowing mediums directly gets into outlet end by the valve body entrance point.
Because power is directly proportional with active area, the big more pressure of area is big more.Therefore, open the less small valve core of area earlier, make a part of pressure import low voltage terminal, the pressure reduction before and after lowering, thus open spool also relatively easily.
In above-mentioned leading type modulating valve, said small valve core is circular and it is enclosed within on the valve rod, and said sealing configuration comprises the packing holder that the small valve core end is recessed, and a small sealing ring is embedded in the packing holder and small sealing ring is connected with valve stem seal.
Small valve core makes realization sealing between the two through small sealing ring after being resisted against the spool top port.Certainly, packing holder is located usefulness to small sealing ring here.
In above-mentioned leading type modulating valve, said sealing configuration also comprises a spring, and said spool inboard has the shoulder block of protrusion, and the two ends difference roof pressure of above-mentioned spring is on shoulder block and small sealing ring.
Small valve core has the trend that breaks away from spool top port place under the elastic force effect of spring.
In above-mentioned leading type modulating valve, has the passage that supplies flowing medium to pass through between said shoulder block and the valve rod.When small valve core was opened, the sub-fraction flowing medium was through getting into outlet end through the entrance point by valve body.
In above-mentioned leading type modulating valve, have the convex edge of protrusion on the said valve rod, above-mentioned small valve core is resisted against on the convex edge under the elastic force effect of spring.
Under the effect of convex edge and spring, small valve core is located.
In above-mentioned leading type modulating valve, described sealing configuration also comprises a spring, and the two ends difference roof pressure of spring is on nut and seal ring.
Such structure makes small valve core have the trend that breaks away from spool upper end-hole place too.
In above-mentioned leading type modulating valve, described nut is through being threadedly connected to the valve rod end.
Make nut and valve rod end firmly fixing through being threaded.
In above-mentioned leading type modulating valve, the said spool outside is with big sealing ring.
When modulating valve was in closed condition, spool contacted with the interior sealing surface of valve body.At this moment, big sealing ring is between spool and valve body sealing surface, and sealing is higher when making the modulating valve closed condition.
In above-mentioned leading type modulating valve, the both sides of said valve body all have pressure-measuring head, and two pressure-measuring heads link with the water-inlet cavity and the water chamber of valve body respectively.Can understand the real medium pressure at modulating valve feed-water end and place, waterexit end behind the pressure measurement instrument insertion pressure-measuring head timely.
Compared with prior art, this leading type modulating valve is opened has process successively, that is: small valve core is opened earlier, and the sub-fraction flowing medium gets into outlet end through the valve body entrance point; Then, again spool is opened.During pressure reduction reaches capacity before and after the valve high pressure, owing to through the pressure release of small valve core place, make the unlatching torsion of valve reduce, valve opening is smooth and easy.
Simultaneously, in opening process, do not need extra other operation of carrying out, just rotate handwheel and get final product, easy and simple to handle, easy to implement.
Description of drawings
Fig. 1 is the perspective view of this leading type modulating valve.
Fig. 2 is the main TV structure schematic representation of this leading type modulating valve.
Fig. 3 is the sectional structure schematic representation of this leading type modulating valve opening state.
Fig. 4 is the sectional structure schematic representation of this leading type modulating valve closed condition.
Fig. 5 is the sectional structure schematic representation of spool in this leading type modulating valve.
Fig. 6 is the A-A sectional structure schematic representation along Fig. 5.
Among the figure, 1, valve body; 2, spool; 2a, shoulder block; 3, valve rod; 3a, convex edge; 4, handle; 5, nut; 6, small valve core; 6a, packing holder; 7, big sealing ring; 8, small sealing ring; 9, spring; 10, pressure-measuring head; 11, pad.
Embodiment
As depicted in figs. 1 and 2, this leading type modulating valve comprises valve body 1, spool 2, valve rod 3 and handle 4.Spool 2 is positioned at valve body 1, and valve rod 3 the inners link with spool 2, and valve rod 3 outer ends are stretched out valve body 1 and linked with handle 4.
Like Fig. 3 and shown in Figure 4, spool 2 is tubular and is enclosed within on the valve rod 3, has nut 5 that can be resisted against spool 2 bottom port places and the small valve core 6 that can be resisted against spool 2 top port places on the valve rod 3.In the present embodiment, spool 2 outsides are with big sealing ring 7.
Spool 2 between nut 5 and small valve core 6 and it can move between the two above-mentioned, have the passage that supplies flowing medium to pass through between spool 2 and the valve rod 3, have between small valve core 6 and spool 2 top port when both contact and can realize the sealing configuration that seals.In the present embodiment, nut 5 is through being threadedly connected to valve rod 3 ends.
As shown in Figure 5, small valve core 6 is circular and it is enclosed within on the valve rod 3, and sealing configuration comprises the packing holder 6a that small valve core 6 ends are recessed, and a small sealing ring 8 is embedded in the packing holder 6a and small sealing ring 8 is tightly connected with valve rod 3.Sealing configuration also comprises a spring 9; Spool 2 inboards have the shoulder block 2a of protrusion; The passage that above-mentioned confession flowing medium passes through is between shoulder block 2a and valve rod 3; The two ends of spring 9 roof pressure respectively in the present embodiment, are provided with pad 11 and pad 11 and are pressed between spring 9 and the small sealing ring 8 on shoulder block 2a and small sealing ring 8 between spring 9 and the small sealing ring 8.As shown in Figure 6, have some recessed grooves on the shoulder block 2a, flowing medium passed through through these some grooves when small valve core 6 was opened.
The convex edge 3a that has protrusion on the valve rod 3, above-mentioned small valve core 6 is resisted against on the 3a of convex edge under the elastic force effect of spring 9.Certainly, the direct roof pressure in the two ends of spring 9 also is feasible on nut 5 and pad 11.
During this modulating valve closed condition, form sealing through big sealing ring 7 between spool 2 and the valve body 1, meanwhile, small valve core 6 is resisted against spool 2 top port places and through small sealing ring 8 spool 2 top port places is sealed.
Handle with sleeve 4 during Open valve; Valve rod 3 at first drives on the small valve core 6 and moves; Small valve core 6 is moved by spool 2 ports, and small sealing ring 8 breaks away from spool 2 top port, and the passage of sub-fraction flowing medium between spool 2 and valve rod 3 gets into outlet end by the entrance point of valve body 1.This process is equivalent to pressure release.
After moving to a certain degree on the small valve core 6, nut 5 is resisted against spool 2 bottom port places, drives spool 2 one the same moving through nut 5, makes spool 2 break away from the sealing surface place of valve body 1.A large amount of flowing mediums directly gets into outlet end by valve body 1 entrance point.
In addition, also have pressure-measuring head 10, and two pressure-measuring heads 10 link with the water-inlet cavity and the water chamber of valve body 1 respectively in the both sides of valve body 1.Can understand the real medium pressure at modulating valve feed-water end and place, waterexit end behind the pressure measurement instrument insertion pressure-measuring head timely.
Claims (9)
1. leading type modulating valve; Comprise valve body (1), spool (2), valve rod (3) and handle (4); Said spool (2) is positioned at valve body (1) and valve rod (3) is inner and spool (2) links; Said valve rod (3) outer end is stretched out valve body (1) and is linked with handle (4), it is characterized in that said spool (2) is tubular and is enclosed within on the valve rod (3); Have the nut (5) that can be resisted against spool (2) bottom port place on the said valve rod (3) and can be resisted against the small valve core (6) at spool (2) top port place; Said spool (2) is positioned between nut (5) and the small valve core (6) and it can move above-mentioned between the two, have the passage that supplies flowing medium to pass through between said spool (2) and the valve rod (3), has between said small valve core (6) and spool (2) top port when both contact to realize the sealing configuration that seals.
2. leading type modulating valve according to claim 1; It is characterized in that; Said small valve core (6) is circular and it is enclosed within on the valve rod (3); Said sealing configuration comprises the packing holder (6a) that small valve core (6) end is recessed, and a small sealing ring (8) is embedded in the packing holder (6a) and small sealing ring (8) is tightly connected with valve rod (3).
3. leading type modulating valve according to claim 2 is characterized in that, said sealing configuration also comprises a spring (9), and said spool (2) inboard has the shoulder block (2a) of protrusion, and the two ends difference roof pressure of above-mentioned spring (9) is on shoulder block (2a) and small sealing ring (8).
4. leading type modulating valve according to claim 3 is characterized in that, has the passage that supplies flowing medium to pass through between said shoulder block (2a) and the valve rod (3).
5. according to claim 1 or 2 or 3 or 4 described leading type modulating valve, it is characterized in that have the convex edge (3a) of protrusion on the said valve rod (3), above-mentioned small valve core (6) is being resisted against on the convex edge (3a) under the elastic force effect of spring (9).
6. leading type modulating valve according to claim 1 is characterized in that, described sealing configuration also comprises a spring (9), and the two ends difference roof pressure of spring (9) is on nut (5) and seal ring.
7. according to claim 1 or 2 or 3 or 4 described leading type modulating valve, it is characterized in that described nut (5) is through being threadedly connected to valve rod (3) end.
8. according to claim 1 or 2 or 3 or 4 described leading type modulating valve, it is characterized in that said spool (2) outside is with big sealing ring (7).
9. according to claim 1 or 2 or 3 or 4 described leading type modulating valve, it is characterized in that the both sides of said valve body (1) all have pressure-measuring head (10), and two pressure-measuring heads (10) link with the water-inlet cavity and the water chamber of valve body (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210122962.5A CN102628523B (en) | 2012-04-24 | 2012-04-24 | Pilot type control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210122962.5A CN102628523B (en) | 2012-04-24 | 2012-04-24 | Pilot type control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102628523A true CN102628523A (en) | 2012-08-08 |
| CN102628523B CN102628523B (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210122962.5A Expired - Fee Related CN102628523B (en) | 2012-04-24 | 2012-04-24 | Pilot type control valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN102628523B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174840A (en) * | 2012-12-03 | 2013-06-26 | 卓旦春 | Static equilibrium valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2727734A1 (en) * | 1994-12-06 | 1996-06-07 | Control Valves Sarl | Control valve with two flow characteristic, used in industrial and heating purposes |
| CN101126459A (en) * | 2007-09-29 | 2008-02-20 | 董映红 | Assistant valve concealed type butterfly valve |
| CN201487236U (en) * | 2009-08-24 | 2010-05-26 | 凯泰阀门(集团)有限公司 | Oxygen stop valve |
| CN201593649U (en) * | 2009-12-11 | 2010-09-29 | 天津精通控制仪表技术有限公司 | Pilot-operated type adjusting valve |
| CN101932861A (en) * | 2007-12-11 | 2010-12-29 | 埃尔斯特有限公司 | Device for blocking and allowing a fluid stream and accompanying method |
| CN202195072U (en) * | 2011-09-07 | 2012-04-18 | 浙江超达阀门股份有限公司 | Stop valve easy to open and close |
| CN202561057U (en) * | 2012-04-24 | 2012-11-28 | 卓旦春 | Pilot type adjustment valve |
-
2012
- 2012-04-24 CN CN201210122962.5A patent/CN102628523B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2727734A1 (en) * | 1994-12-06 | 1996-06-07 | Control Valves Sarl | Control valve with two flow characteristic, used in industrial and heating purposes |
| CN101126459A (en) * | 2007-09-29 | 2008-02-20 | 董映红 | Assistant valve concealed type butterfly valve |
| CN101932861A (en) * | 2007-12-11 | 2010-12-29 | 埃尔斯特有限公司 | Device for blocking and allowing a fluid stream and accompanying method |
| CN201487236U (en) * | 2009-08-24 | 2010-05-26 | 凯泰阀门(集团)有限公司 | Oxygen stop valve |
| CN201593649U (en) * | 2009-12-11 | 2010-09-29 | 天津精通控制仪表技术有限公司 | Pilot-operated type adjusting valve |
| CN202195072U (en) * | 2011-09-07 | 2012-04-18 | 浙江超达阀门股份有限公司 | Stop valve easy to open and close |
| CN202561057U (en) * | 2012-04-24 | 2012-11-28 | 卓旦春 | Pilot type adjustment valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174840A (en) * | 2012-12-03 | 2013-06-26 | 卓旦春 | Static equilibrium valve |
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| Publication number | Publication date |
|---|---|
| CN102628523B (en) | 2014-12-03 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20180424 |