CN105387228A - Zero-leakage plunger valve sealed through magnetic fluid - Google Patents
Zero-leakage plunger valve sealed through magnetic fluid Download PDFInfo
- Publication number
- CN105387228A CN105387228A CN201510750323.7A CN201510750323A CN105387228A CN 105387228 A CN105387228 A CN 105387228A CN 201510750323 A CN201510750323 A CN 201510750323A CN 105387228 A CN105387228 A CN 105387228A
- Authority
- CN
- China
- Prior art keywords
- valve
- plunger
- sealing
- magnetic fluid
- magnetic liquid
- Prior art date
- 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.)
- Pending
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Classifications
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
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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
- F16K41/00—Spindle sealings
- F16K41/003—Spindle sealings by fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a zero-leakage plunger valve sealed through magnetic fluid and belongs to the field of mechanical engineering valves. The zero-leakage plunger type valve is suitable for pipeline valves conveying dangerous chemical gas and liquid with low conveying pressure and also suitable for pipeline vacuum valves with the very high requirement for sealing. A magnetic fluid passage is machined on a pole shoe, a magnetic fluid storage hole is machined in the valve, and an injector is manufactured to be matched with the fluid storage hole. Failed sealing caused by reducing of the amount of the magnetic fluid in a sealing part system is avoided, and the sealing reliability of the plunger valve is greatly improved. A very good effect is obtained in practical application, and the zero-leakage plunger valve sealed through the magnetic fluid plays a significant role in solving the problem of application of the plunger valve in a special environment and expanding the application range of magnetic fluid sealing.
Description
Technical field
The invention belongs to plunger valve technical field, be particularly useful for the pipeline valve of the not high hazardous chemical gas of discharge pressure and liquid, also can be used for the pipeline vacuum valve very high to seal request.
Background technique
Plunger valve uses very general a kind of valve, is the amelioration product of stop valve, inherits stop valve structure simple, the advantage that manufacturing process is good.Its working principle is by rotation hand wheel, and actuate valve stem is rotated, and then drives plunger ascending, descending to play the effect opening and closing valve.In prior art, plunger valve sealing means is that the radial interference fit produced in the pretightening force that valve gap clamping bolt is applied on valve gap by plunger and upper and lower seal ring is realized, its seal ring adopts Expanded graphite usually, and the nonmetallic material such as teflon are made.When plunger valve uses in steam pipework; because of start, shut down produce effect of expanding with heat and contract with cold and will inevitably have influence on sealing effect between plunger and seal ring; make to produce micro-weeping between the two; especially go up between seal ring and plunger and leak outside, producing leakage when sealing poisonous medium can cause serious consequence.And the valve of other types is except the sealing of employing said method, some employing metal sealings, the then employing rubber seal had.These materials in use all can be gradually worn down, and also can by corrosion to a certain extent when carrying and having Korrosionsmedium, and this also will aggravate its seal failure.Sealability and the working life of therefore improving valve are the Hot Contents that valve is studied always.
Magnetic fluid sealing have tight sealing, immeasurablel leak-down rate, long lifetime, reliability high, the feature such as not pollute; Even if magnetic fluid sealing is when interrupt run, also unlike being resiliently sealed in by advantages such as the impacts of speedup and relaxation between down period, just because of this, magnetic fluid sealing has important irreplaceable effect in a lot of industry.
The opening and closing of plunger valve does straight reciprocating motion realization by the plunger that rotarily drives of handwheel, but the to-and-fro motion of plunger can take away some magnetic liquids, long to-and-fro motion finally can cause seal failure because of the minimizing of the magnetic liquid scale of construction in seal clearance.In order to solve the problem, the present invention on pole shoe, process magnetic liquid path and with on valve body, process magnetic liquid store fluid apertures, and make injector with storage fluid apertures coordinate, magnetic liquid in seal clearance is connected with magnetic liquid in storage fluid apertures, when plunger moves reciprocatingly, in gap, magnetic liquid part in compression flows into storage fluid apertures, by driven forward syringe piston, magnetic liquid is refilled seal clearance when magnetic liquid in gap reduces more, avoid because the magnetic liquid scale of construction in Sealing system reduces the seal failure caused.Substantially increase the sealing reliability of plunger valve.
Summary of the invention
Technical problem to be solved by this invention:
Solve the problem that conventional post plug valve sealability is not enough, application area is limited, improve sealability and the working life of valve.Solve the magnetic liquid scale of construction in magnetic fluid sealing to-and-fro motion simultaneously and reduce the problem causing seal failure.
The present invention solves the technological scheme of its technical problem:
Adopt a zero leakage plunger type valve for magnetic fluid sealing, this valve comprises hand wheel nut, handwheel, screw, Stem Mut, valve gap, valve rod, stud, nut, pole shoe, permanent magnet, injector, plunger, aperture frame, flexible graphite sealing ring, valve body.
Handwheel and valve rod by hand wheel nut adopt be threaded fixing;
Valve rod is connected by Stem Mut with valve gap;
Valve gap and valve body are bolted;
Plunger and valve rod are threaded connection;
Pole shoe and permanent magnet and flexible graphite sealing ring are installed between valve gap and valve body by aperture frame, and the load be applied on valve gap by bolt is fastened seal ring;
Injector and magnetic liquid are store fluid apertures and are coordinated;
When valve body closes, magnetic liquid forms sealing at plunger and pole shoe gap location, also has plunger and flexible graphite sealing ring place to form sealing.When valve journey opening state, during unlatching, although plunger departs from flexible graphite sealing ring, magnetic liquid still seals, and keeps being isolated from the outside, and unlikelyly leaks.
The beneficial effect that the present invention has:
Due to the intrinsic advantage of magnetic fluid sealing, adopt the plunger valve of magnetic fluid sealing in valve closes and medium transport process, sealing medium can reach zero leakage relative to valve body space outerpace.The present invention on pole shoe, process magnetic liquid path and with on valve body, process magnetic liquid store fluid apertures, and make injector with storage fluid apertures coordinate, magnetic liquid in seal clearance is connected with magnetic liquid in storage fluid apertures, when plunger moves reciprocatingly, in gap, magnetic liquid part in compression flows into storage fluid apertures, by driven forward syringe piston, magnetic liquid is refilled seal clearance when magnetic liquid in gap reduces more, avoid because the magnetic liquid scale of construction in Sealing system reduces the seal failure caused.Substantially increase the sealing reliability of plunger valve.Obtain good effect in actual applications, to solving the application problem of plunger valve in particular surroundings and widening the application range of magnetic fluid sealing, have great importance.
Accompanying drawing explanation
Fig. 1 magnetic liquid plunger type valve general assembly drawing.
The partial enlarged drawing at I place in Fig. 2 Fig. 1.
In figure: hand wheel nut (1), handwheel (2), screw (3), Stem Mut (4), valve gap (5), valve rod (6), stud (7), nut (8), pole shoe (9), permanent magnet (10), injector (11), plunger (12), aperture frame (13), flexible graphite sealing ring (14), valve body (15).
Embodiment
The invention will be further described by reference to the accompanying drawings.
Adopt a zero leakage plunger type valve for magnetic fluid sealing, it is characterized in that: this valve comprises hand wheel nut 1, handwheel 2, screw 3, Stem Mut 4, valve gap 5, valve rod 6, stud 7, nut 8, pole shoe 9, permanent magnet 10, injector 11, plunger 12, aperture frame 13, flexible graphite sealing ring 14, valve body 15.
Handwheel 2 and valve rod 6 by hand wheel nut 1 adopt be threaded fixing;
Valve rod 6 is connected by Stem Mut 4 with valve gap 5;
Valve gap 5 is connected by bolt 7,8 with valve body 15;
Plunger 12 is connected with valve rod 4;
Pole shoe 9 and permanent magnet 10 and flexible graphite sealing ring 14 are installed between valve gap and valve body by aperture frame, and the load be applied on valve gap by bolt 7,8 is fastened seal ring 14;
Injector 11 and magnetic liquid are store fluid apertures and are coordinated;
When valve body closes, magnetic liquid forms sealing at plunger 12 and pole shoe 9 gap location, also has plunger 12 and flexible graphite sealing ring 14 place to form sealing.When valve journey opening state, during unlatching, although plunger 12 departs from flexible graphite sealing ring 14, magnetic liquid still seals, and keeps being isolated from the outside, and unlikelyly leaks.
Claims (3)
1. adopt a zero leakage plunger type valve for magnetic fluid sealing, it is characterized in that: this valve comprises hand wheel nut (1), handwheel (2), screw (3), Stem Mut (4), valve gap (5), valve rod (6), stud (7), nut (8), pole shoe (9), permanent magnet (10), injector (11), plunger (12), aperture frame (13), flexible graphite sealing ring (14), valve body (15).
Handwheel (2) and valve rod (6) by hand wheel nut (1) adopt be threaded fixing;
Valve rod (6) is connected by Stem Mut (4) with valve gap (5);
Valve gap (5) is connected by bolt (7), (8) with valve body (15);
Plunger (12) is connected with valve rod (4);
Pole shoe (9) and permanent magnet (10) and flexible graphite sealing ring (14) are installed between valve gap and valve body by aperture frame, and the load be applied on valve gap by bolt (7), (8) is fastened seal ring (14);
Injector (11) and magnetic liquid are store fluid apertures and are coordinated;
When valve body closes, magnetic liquid forms sealing at plunger (12) and pole shoe (9) gap location, also has plunger (12) and flexible graphite sealing ring (14) place to form sealing.When valve journey opening state, during unlatching, plunger (12) is although depart from flexible graphite sealing ring (14), and magnetic liquid still seals, and keeps being isolated from the outside, and unlikelyly leaks.
2. a kind of zero leakage plunger type valve adopting magnetic fluid sealing according to claim 1, it is characterized in that in bipolar shoe (9), perforate is connected with storage fluid apertures respectively, in seal clearance, magnetic liquid is connected with magnetic liquid in storage fluid apertures by passage in pole shoe.
3. a kind of zero leakage plunger type valve adopting magnetic fluid sealing according to claim 1, it is characterized in that making injector (11), injector (11) is made up of rubber stopper and piston rod, rubber stopper and storage fluid apertures inwall interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750323.7A CN105387228A (en) | 2015-11-06 | 2015-11-06 | Zero-leakage plunger valve sealed through magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750323.7A CN105387228A (en) | 2015-11-06 | 2015-11-06 | Zero-leakage plunger valve sealed through magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105387228A true CN105387228A (en) | 2016-03-09 |
Family
ID=55419816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510750323.7A Pending CN105387228A (en) | 2015-11-06 | 2015-11-06 | Zero-leakage plunger valve sealed through magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387228A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485270A (en) * | 1966-05-20 | 1969-12-23 | Lucas Industries Ltd | Electro-magnetic fluid flow control devices |
| CN2132881Y (en) * | 1992-07-25 | 1993-05-12 | 东北工学院 | Rotating shaft magnetic fluid sealing device |
| CN2455975Y (en) * | 2000-12-13 | 2001-10-24 | 龚福秋 | Angular plunger valve |
| CN101776150A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Combined reciprocating sealing device of magnetic liquid, C-shaped slip ring and Y x type seal ring |
| CN103759009A (en) * | 2014-01-17 | 2014-04-30 | 北京交通大学 | Fluid dynamic pressure type magnetic liquid seal device |
| CN104534099A (en) * | 2014-12-15 | 2015-04-22 | 邓海波 | Intelligent sealing device for ship tail shaft numerical control magnetic fluid |
-
2015
- 2015-11-06 CN CN201510750323.7A patent/CN105387228A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485270A (en) * | 1966-05-20 | 1969-12-23 | Lucas Industries Ltd | Electro-magnetic fluid flow control devices |
| CN2132881Y (en) * | 1992-07-25 | 1993-05-12 | 东北工学院 | Rotating shaft magnetic fluid sealing device |
| CN2455975Y (en) * | 2000-12-13 | 2001-10-24 | 龚福秋 | Angular plunger valve |
| CN101776150A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Combined reciprocating sealing device of magnetic liquid, C-shaped slip ring and Y x type seal ring |
| CN103759009A (en) * | 2014-01-17 | 2014-04-30 | 北京交通大学 | Fluid dynamic pressure type magnetic liquid seal device |
| CN104534099A (en) * | 2014-12-15 | 2015-04-22 | 邓海波 | Intelligent sealing device for ship tail shaft numerical control magnetic fluid |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |
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| WD01 | Invention patent application deemed withdrawn after publication |