CN102628523B - Pilot type control valve - Google Patents
Pilot type control valve Download PDFInfo
- Publication number
- CN102628523B CN102628523B CN201210122962.5A CN201210122962A CN102628523B CN 102628523 B CN102628523 B CN 102628523B CN 201210122962 A CN201210122962 A CN 201210122962A CN 102628523 B CN102628523 B CN 102628523B
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- valve
- spool
- small
- valve rod
- valve core
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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 pilot-operated type adjusting valve.
Background technique
After valve closing, during pressure reduction reaches capacity before and after valve high pressure, the unlatching torsion of valve can be very large.That is to say, during Open valve, hand wheel rotating is subject to larger resistance, and operator can not be smooth and easy fast by valve opening.
For the problems referred to above, its publication number of Chinese patent CN2037419U provide a kind of " Pilot operated safety valve ", and it take main valve and pilot valve is that major component forms Pilot operated safety valve.On main valve flap, effect has main spool spring and main valve pressure chamber, pilot valve to have the double spool valve that imports spool and derive spool.Ta Neng main valve pressure chamber does not lose automatic unlatching and automatic closing function while there is leakage failure.Its Blowdown of a safety valve is little, and switching motion is sensitive reliable, and good seal performance easily obtains larger Lift.But it is mainly used in pressure system superpressure preventing safety relief, for modulating valve, it can not be suitable for.
Existing other modulating valve also all exists similar problem.
Summary of the invention
The object of the invention is the problems referred to above that exist for prior art, a kind of pilot-operated type adjusting valve smooth and easy, simple in structure of opening is provided.
Object of the present invention can realize by following technical proposal: a kind of pilot-operated type adjusting valve, comprise valve body, spool, valve rod and handle, described spool is positioned at valve body and valve rod is inner and spool is connected, described valve rod outer end stretches out valve body and handle is connected, it is characterized in that, described spool is tubular and is enclosed within on valve rod, on described valve rod, there is the nut that can be resisted against spool bottom port place and the small valve core that can be resisted against spool top port place, described spool between nut and small valve core and it can move between the two above-mentioned, between described spool and valve rod, there is the passage passing through for flowing medium, between described small valve core and spool top port, have when both contact the sealing configuration that can realize sealing.
During this modulating valve closed condition, between spool and valve body, form sealing, meanwhile, small valve core be resisted against spool top port place by sealing configuration by spool port sealing.
During Open valve, first valve rod drives on small valve core and moves, and small valve core is moved by spool port, and now, the passage of sub-fraction flowing medium between spool and valve rod enters outlet end by the entrance point of valve body.
After moving to a certain degree on small valve core, nut is resisted against spool bottom port place, by nut band movable valve plug, moves on together, makes spool depart from the sealing surface place of valve body.A large amount of flowing mediums directly enters outlet end by valve body entrance point.
Because power is directly proportional to active area, the larger pressure of area is larger.Therefore, first open the small valve core that area is less, make a part of pressure import low voltage terminal, the pressure reduction before and after lowering, thus it is also lighter to open spool.
In above-mentioned pilot-operated type adjusting valve, described small valve core be circular and its be enclosed within on valve rod, described sealing configuration comprises the packing holder that small valve core end is recessed, a small sealing ring is embedded in packing holder and small sealing ring is connected with valve stem seal.
Small valve core makes to realize sealing between the two by small sealing ring after being resisted against spool top port.Certainly, packing holder is located use to small sealing ring here.
In above-mentioned pilot-operated type adjusting valve, described sealing configuration also comprises a spring, and described spool inner side has the shoulder block of protrusion, and the two ends of above-mentioned spring are pushed up respectively and are pressed on shoulder block and small sealing ring.
Under the elastic force effect of spring, small valve core has the trend that departs from spool top port place.
In above-mentioned pilot-operated type adjusting valve, between described shoulder block and valve rod, there is the passage passing through for flowing medium.When small valve core is opened, sub-fraction flowing medium was through entering outlet end by the entrance point by valve body.
In above-mentioned pilot-operated type adjusting valve, on described valve rod, there is the convex edge of protrusion, above-mentioned small valve core is resisted against on 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 pilot-operated type adjusting valve, described sealing configuration also comprises a spring, and the two ends of spring are pushed up respectively and are pressed on nut and seal ring.
Such structure makes small valve core have the trend that departs from spool upper end-hole place too.
In above-mentioned pilot-operated type adjusting valve, described nut is threaded connection in valve rod end.
Be threaded connection and make nut and valve rod end firmly fixing.
In above-mentioned pilot-operated type adjusting valve, described spool outside cover has big sealing ring.
Modulating valve is when closed condition, and spool contacts with the sealing surface in valve body.Now, big sealing ring is between spool and valve body sealing surface, and while making modulating valve closed condition, sealing is higher.
In above-mentioned pilot-operated type adjusting valve, the both sides of described valve body all have pressure-measuring head, and two pressure-measuring heads are connected with water-inlet cavity and the water chamber of valve body respectively.After pressure measuring tool insertion pressure-measuring head, can understand timely the real medium pressure at modulating valve feed-water end and place, waterexit end.
Compared with prior art, this pilot-operated type adjusting valve is opened successively process, that is: small valve core is first opened, and sub-fraction flowing medium enters outlet end through valve body entrance point; Then, then by spool open.During pressure reduction reaches capacity before and after the valve high pressure, due to by the pressure release of small valve core place, the unlatching torsion of valve is reduced, valve opening is smooth and easy.
Meanwhile, in opening process, do not need additionally to carry out other operation, just rotate handwheel, easy and simple to handle, easy to implement.
Accompanying drawing explanation
Fig. 1 is the perspective view of this pilot-operated type adjusting valve.
Fig. 2 is the main TV structure schematic diagram of this pilot-operated type adjusting valve.
Fig. 3 is the sectional structure schematic diagram of this pilot-operated type adjusting valve opening state.
Fig. 4 is the sectional structure schematic diagram of this pilot-operated type adjusting valve closed condition.
Fig. 5 is the sectional structure schematic diagram of spool in this pilot-operated type adjusting valve.
Fig. 6 is the A-A sectional structure schematic diagram along Fig. 5.
In 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 pilot-operated type adjusting 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 is inner to be connected with spool 2, and valve rod 3 outer ends are stretched out valve body 1 and are connected with handle 4.
As shown in Figure 3 and Figure 4, spool 2 is tubular and is enclosed within on valve rod 3, has the 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 valve rod 3.In the present embodiment, spool 2 outside covers have big sealing ring 7.
Spool 2 between nut 5 and small valve core 6 and it can move between the two above-mentioned, between spool 2 and valve rod 3, there is the passage passing through for flowing medium, between small valve core 6 and spool 2 top port, have when both contact and can realize the sealing configuration sealing.In the present embodiment, nut 5 is threaded connection in valve rod 3 ends.
As shown in Figure 5, small valve core 6 be circular and its be enclosed within on valve rod 3, sealing configuration comprises the packing holder 6a that small valve core 6 ends are recessed, a small sealing ring 8 is embedded in packing holder 6a and small sealing ring 8 is tightly connected with valve rod 3.Sealing configuration also comprises a spring 9, spool 2 inner sides have the shoulder block 2a of protrusion, the above-mentioned passage passing through for flowing medium is between shoulder block 2a and valve rod 3, the two ends of spring 9 are pushed up respectively and are pressed on shoulder block 2a and small sealing ring 8, in the present embodiment, between spring 9 and small sealing ring 8, be provided with pad 11 and pad 11 and be pressed between spring 9 and small sealing ring 8.As shown in Figure 6, have some recessed grooves on shoulder block 2a, when small valve core 6 is opened, flowing medium passes through through these some grooves.
The convex edge 3a on valve rod 3 with protrusion, above-mentioned small valve core 6 is resisted against on the 3a of convex edge under the elastic force effect of spring 9.Certainly, to be pressed on nut 5 and pad 11 be also feasible to the two ends immediate roof of spring 9.
During this modulating valve closed condition, between spool 2 and valve body 1, by big sealing ring 7, form sealing, meanwhile, small valve core 6 is resisted against spool 2 top port places and by small sealing ring 8, spool 2 top port places is sealed.
During Open valve, handle with sleeve 4, first valve rod 3 drives on small valve core 6 and moves, small valve core 6 is moved by spool 2 ports, and small sealing ring 8 departs from spool 2 top port, and the passage of sub-fraction flowing medium between spool 2 and valve rod 3 enters outlet end by the entrance point of valve body 1.This process is equivalent to pressure release.
After moving to a certain degree on small valve core 6, nut 5 is resisted against spool 2 bottom port places, and by nut 5 band, movable valve plug 2 one is the same moves, and makes spool 2 depart from the sealing surface place of valve bodies 1.A large amount of flowing mediums directly enters outlet end by valve body 1 entrance point.
In addition, in the both sides of valve body 1, also there is pressure-measuring head 10, and two pressure-measuring heads 10 are connected with water-inlet cavity and the water chamber of valve body 1 respectively.After pressure measuring tool insertion pressure-measuring head, can understand timely the real medium pressure at modulating valve feed-water end and place, waterexit end.
Claims (11)
1. a pilot-operated type adjusting valve, comprise valve body (1), spool (2), valve rod (3) and handle (4), described spool (2) is positioned at valve body (1) and valve rod (3) is inner and spool (2) is connected, described valve rod (3) outer end is stretched out valve body (1) and is connected with handle (4), it is characterized in that, described spool (2) is tubular and is enclosed within on valve rod (3), on described valve rod (3), there is the small valve core (6) that can be resisted against the nut (5) at spool (2) bottom port place and can be resisted against spool (2) top port place, described spool (2) is positioned between nut (5) and small valve core (6) and it can move between the two above-mentioned, between described spool (2) and valve rod (3), there is the passage passing through for flowing medium, between described small valve core (6) and spool (2) top port, have when both contact the sealing configuration that can realize sealing, during this modulating valve closed condition, between spool (2) and valve body (1), form sealing, meanwhile, small valve core (6) be resisted against spool (2) top port place by sealing configuration by spool (2) port sealing, described small valve core (6) be circular and its be enclosed within on valve rod (3), described sealing configuration comprises the packing holder (6a) that small valve core (6) end is recessed, one small sealing ring (8) is embedded in packing holder (6a) and small sealing ring (8) is tightly connected with valve rod (3), described sealing configuration also comprises a spring (9), described spool (2) inner side has the shoulder block (2a) of protrusion, the two ends of above-mentioned spring (9) are pushed up respectively and are pressed on shoulder block (2a) and small sealing ring (8).
2. pilot-operated type adjusting valve according to claim 1, is characterized in that, has the passage passing through for flowing medium between described shoulder block (2a) and valve rod (3).
3. pilot-operated type adjusting valve according to claim 1 and 2, is characterized in that, has the convex edge (3a) of protrusion on described valve rod (3), and above-mentioned small valve core (6) is resisted against on convex edge (3a) under the elastic force effect of spring (9).
4. pilot-operated type adjusting valve according to claim 1 and 2, is characterized in that, described nut (5) is threaded connection in valve rod (3) end.
5. pilot-operated type adjusting valve according to claim 1 and 2, is characterized in that, described spool (2) outside cover has big sealing ring (7).
6. pilot-operated type adjusting valve according to claim 1 and 2, is characterized in that, the both sides of described valve body (1) all have pressure-measuring head (10), and two pressure-measuring heads (10) are connected with water-inlet cavity and the water chamber of valve body (1) respectively.
7. a pilot-operated type adjusting valve, comprise valve body (1), spool (2), valve rod (3) and handle (4), described spool (2) is positioned at valve body (1) and valve rod (3) is inner and spool (2) is connected, described valve rod (3) outer end is stretched out valve body (1) and is connected with handle (4), it is characterized in that, described spool (2) is tubular and is enclosed within on valve rod (3), on described valve rod (3), there is the small valve core (6) that can be resisted against the nut (5) at spool (2) bottom port place and can be resisted against spool (2) top port place, described spool (2) is positioned between nut (5) and small valve core (6) and it can move between the two above-mentioned, between described spool (2) and valve rod (3), there is the passage passing through for flowing medium, between described small valve core (6) and spool (2) top port, have when both contact the sealing configuration that can realize sealing, during this modulating valve closed condition, between spool (2) and valve body (1), form sealing, meanwhile, small valve core (6) be resisted against spool (2) top port place by sealing configuration by spool (2) port sealing, described small valve core (6) be circular and its be enclosed within on valve rod (3), described sealing configuration comprises the packing holder (6a) that small valve core (6) end is recessed, one small sealing ring (8) is embedded in packing holder (6a) and small sealing ring (8) is tightly connected with valve rod (3), described sealing configuration also comprises a spring (9), between spring (9) and small sealing ring (8), being provided with pad (11) and pad (11) is pressed between spring (9) and small sealing ring (8), the two ends immediate roof of spring (9) is pressed on nut (5) and pad (11).
8. pilot-operated type adjusting valve according to claim 7, is characterized in that, has the convex edge (3a) of protrusion on described valve rod (3), and above-mentioned small valve core (6) is resisted against on convex edge (3a) under the elastic force effect of spring (9).
9. according to the pilot-operated type adjusting valve described in claim 7 or 8, it is characterized in that, described nut (5) is threaded connection in valve rod (3) end.
10. according to the pilot-operated type adjusting valve described in claim 7 or 8, it is characterized in that, described spool (2) outside cover has big sealing ring (7).
11. according to the pilot-operated type adjusting valve described in claim 7 or 8, it is characterized in that, the both sides of described valve body (1) all have pressure-measuring head (10), and two pressure-measuring heads (10) are connected with 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 CN102628523A (en) | 2012-08-08 |
| CN102628523B true CN102628523B (en) | 2014-12-03 |
Family
ID=46586847
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 |
|---|---|
| CN (1) | CN102628523B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943910A (en) * | 2012-12-03 | 2013-02-27 | 卓旦春 | Static balance valve |
Citations (6)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL2071217T3 (en) * | 2007-12-11 | 2010-12-31 | Elster Gmbh | Device for blocking and allowing a fluid stream and accompanying method |
-
2012
- 2012-04-24 CN CN201210122962.5A patent/CN102628523B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102628523A (en) | 2012-08-08 |
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| C10 | Entry into substantive examination | ||
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Granted publication date: 20141203 Termination date: 20180424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |