CN110259981A - A kind of multi-stage sealed valve seat of pipeline ball-valve - Google Patents
A kind of multi-stage sealed valve seat of pipeline ball-valve Download PDFInfo
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- CN110259981A CN110259981A CN201910555178.5A CN201910555178A CN110259981A CN 110259981 A CN110259981 A CN 110259981A CN 201910555178 A CN201910555178 A CN 201910555178A CN 110259981 A CN110259981 A CN 110259981A
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- valve seat
- sealing ring
- seal receptacle
- sphere
- floating
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- 238000007789 sealing Methods 0.000 claims abstract description 116
- 238000007667 floating Methods 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 18
- 210000004907 gland Anatomy 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 17
- 239000002245 particle Substances 0.000 abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003345 natural gas Substances 0.000 abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 description 12
- 229920001778 nylon Polymers 0.000 description 12
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- 239000007789 gas Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000007769 metal material Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004696 Poly ether ether ketone Substances 0.000 description 5
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 5
- 229920002530 polyetherether ketone Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0668—Single packings
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The multi-stage sealed valve seat of pipeline ball-valve of the invention, including valve body, sphere, floating valve seat, first order seal receptacle and second level sealing ring；First order seal receptacle is located at the internal edge of floating valve seat, and one end of the first thrust spring is located in the circle groove inside floating valve seat, and the other end of the first thrust spring is resisted against on first order seal receptacle, and the other end of first order seal receptacle is resisted against on sphere；Second level sealing ring is embedded in floating valve seat and is pressed on the outside of first order seal receptacle, and the edge of second level sealing ring is resisted against on sphere；One end of second thrust spring is located in a circle groove of valve inner, and the other end of the second thrust spring is resisted against on floating valve seat.Third level sealing ring and fourth stage seal receptacle can also be added.High pressure sealing rouge can also be injected in closed cavity and carry out forced seal, it is ensured that pipeline safety operation.The present invention is suitable for the natural gas line of solid particle, carries out soft or hard sealing, is able to satisfy the requirement of bubble grade sealing.
Description
Technical field
The invention belongs to the seal valve seat technical fields of ball valve, and in particular to a kind of multi-stage sealed valve seat of pipeline ball-valve.
Background technique
Pipeline ball-valve in natural gas transportation is the floating valve seat using combined sealing structure.This floating valve seat still in
Among development, improvement.This is because being inevitably present the solid particles such as welding slag, salad, iron rust, sawdust in pipeline.Sealing
The design of valve seat can neither solely use soft sealing structure, not can avoid abrasion and wiping of the solid particle to soft sealing valve seat
Wound；Metal hard sealing structure cannot be used again, seal request is not achieved, and be in dilemma, be the developing core of pipeline ball-valve
Heart technology and global problem.
The last century the fifties, the pioneering pipeline ball-valve of Cameron company, the U.S. are using a kind of combined sealing structure:
Stop-leak compound is injected into sealed nylon week when minor leakage occurs by the primary seal of nylon or PTFE material as sealing material
It encloses, stop-leak compound follows the flowing of leakage medium to block the abrasive surface of sealed nylon circle, prevents passing through for medium, is that one kind is faced
When property, and be not very reliable emergency measure.
Thereafter, Italian Grove company releases another combined sealing structure: using metal to metal primary seal and
The soft seal of secondary rubber elastic material, to reach seal request.The primary seal of this so-called metal to metal, actually
Still retain the gap of 0.2-0.4mm between sealing surface, to prevent from abrading spherome surface, therefore, can only actually prevent big
Grain solid particle enters next stage soft seal.It, equally can only be by stop-leak compound when minute solid particles are worn or abrade rubber
Be infused in the gap of an open type, to block the rubber surface being scratched, prevent passing through for medium, and it is a kind of not very
Reliable provisional emergency measure.
On the basis of this basic structure, Canadian Velan, German Schuck, Italian Nuovo Pignone, meaning
Big benefit Valvitalia and Italy Gasket uses similar structures, does not there is substantive variation.
It is as shown in Figure 1 a kind of cut-away section signal of the above-mentioned Italian company Gasket combined sealing structure released
Figure.The combined sealing structure includes valve body 11, the sphere 17 inside the valve body 11, floating valve seat 15, several float traps
Seat thrust spring 14, the first sealing ring of floating valve seat 16 and the second sealing ring of floating valve seat 13；The floating valve seat thrust spring
14 one end against the valve body 11, the other end against the floating valve seat 15, for the floating valve seat 15 to be resisted against institute
It states on sphere 17；First sealing ring of floating valve seat 16 is located at the inside of the floating valve seat 15, is located at and the sphere 17
Sphere-contact position；Second sealing ring of floating valve seat 13 is between the valve body 11 and the floating valve seat 15.
The combined sealing structure further includes stop-leak compound injection channel 12；The stop-leak compound injection channel 12 includes across the valve body 11
The other end of several radial passages and several axial passages being connected to several described radial passages, several axial passages is logical
To the sphere 17.After assembly under the effect of spring 14, the initial sealing between floating valve seat 15 and sphere 17 is obtained, in operating condition
Under, medium enters diameter of phi E annulus area, and floating valve seat 15 is pushed under the action of medium power, makes sealing ring 16 and sphere 17
Spherical surface be in close contact and keep sealing.There is the gap of 0.2-0.4mm between floating valve seat 15 and the spherical surface of sphere 17, can hinder
Only bulky grain solid passes through, and to protect sealing ring 16, when leaking, stop-leak compound is injected into sphere 17 by channel 12
Surface, to obtain provisional sealing, this is a kind of existing traditional sealing structure, there is the sealing ring 16 by solid
Grain scratch causes the possibility of leakage.
Summary of the invention
The present invention is in view of the deficienciess of the prior art, provide a kind of multi-stage sealed valve seat of pipeline ball-valve, using multistage dense
Envelope has stronger sealing function, to solve the problems, such as that existing seal valve seat is easy leakage.
The technical scheme to solve the above technical problems is that a kind of multi-stage sealed valve seat of pipeline ball-valve, including valve
Body, the sphere positioned at the valve inner, cylindric floating valve seat, first order seal receptacle, second level sealing ring, the first thrust
Spring and the second thrust spring；The first order seal receptacle is located at the internal edge of the floating valve seat, the first thrust bullet
One end of spring is located in the circle groove inside the floating valve seat, and the other end of first thrust spring is resisted against described the
On primary seal seat, the other end of the first order seal receptacle is resisted against on the sphere；The second level sealing ring is embedded in
It in the floating valve seat and is pressed on the outside of the first order seal receptacle, the edge of the second level sealing ring is resisted against the ball
On body；One end of second thrust spring be located at the valve inner one circle groove in, second thrust spring it is another
One end is resisted against on the floating valve seat.
The present invention is further arranged to, and further includes third level sealing ring, and the third level sealing ring is embedded in described second
In a circle groove inside the floating valve seat on the outside of grade sealing ring, the edge of the third level sealing ring is resisted against the ball
On body.
The present invention is further arranged to, and further includes fourth stage seal receptacle, and the fourth stage seal receptacle is at the end of floating valve seat
Portion is pressed on third level sealing ring, and the inner ring surface of the fourth stage seal receptacle is resisted against on the sphere.
The present invention is further arranged to, and further includes greasing channel；The greasing channel include across the valve body several
Radial passage and several axial passages being connected to the radial passage, the other end of the axial passage lead to the sphere
Surface.
The present invention is further arranged to, the floating valve seat, the second level sealing ring, the third level sealing ring, institute
Stating between sphere, the greasing channel is a totally enclosed stop-leak compound injection cavity.
The present invention is further arranged to, and is set in a circle groove of the floating valve seat of the first order seal receptacle outer cylinder
There are the first O-ring seals.
The present invention is further arranged to, and it is close to be respectively equipped with the 2nd O shape on the intracorporal floating valve seat outer cylinder of valve
Seal and third O-ring seals.
The present invention is further arranged to, the floating between second O-ring seals and the third O-ring seals
Valve seat outer cylinder is equipped with fire-protection ring.
The present invention is further arranged to, and further includes discoid gland, and the gland is placed in the end of the floating valve seat
And by bolt presses on the floating valve seat.
The present invention is further arranged to, and further includes cylindrical support base, and the support base is embedded in the floating valve seat
In inclined-plane, it is in contact between second O-ring seals and the third O-ring seals, and with the sphere.
Preferably, the material of the support base is high molecular material, such as nylon, polyimides, PEEK.
Preferably, the material of the first order seal receptacle is high molecular materials or the gold such as nylon, polyimides, PEEK
Belong to.
Preferably, the cross sectional shape of the second level sealing ring is triangle, circle, rectangular or other shapes, and material is excellent
Select high molecular material, such as rubber, PEEK plastics.
Preferably, the cross sectional shape of the third level sealing ring is triangle, circle, rectangular or other shapes, and material is excellent
Select high molecular material, such as rubber, PEEK plastics.
Preferably, fourth stage seal receptacle is a ringlike round plate, and material is high molecular material or metal, preferably macromolecule material
Material, such as PTFE, PEEK nylon.
Preferably, fourth stage seal receptacle is the combination of multi-layer annular plectane, and one layer of metal, one layer of PTFE plastics are alternately arranged,
Five to nine layers in total.
Preferably, first thrust spring is that helical spring, leaf spring, butterfly spring, ring waveform spring or steel wire are different
Shape spring.
A kind of multi-stage sealed valve seat for pipeline ball-valve of the invention is conveyed at one in the gas with solid particle
In pipeline, the effective means of pipeline ball-valve leakage is solved.Compared with prior art, existing sealing structure is a soft seal,
A kind of multi-stage sealed valve seat for pipeline ball-valve of the invention is the above sealing structure of two-stage, in emergency circumstances injects stop-leak compound
To ensure the safe operation of natural gas line.Wherein, first order seal receptacle is using high molecular material or metal material to metal
Harder sealing.The second level, the relatively sealing material that third level sealing ring is elastomeric polymeric material, it is possible to provide the sealing of bubble grade, ten
Divide reliable.Just in case in the case where micro leakage, stop-leak compound injection is a kind of pressure forced seal, provides and a kind of meets pipeline ball-valve
The functional requirement of bubble grade sealing.
Detailed description of the invention
Fig. 1 is the partial cutaway schematic view of the sealing structure for the existing pipeline ball-valve mentioned in background technique；
Fig. 2 is the partial cutaway schematic view of embodiment 4.
Fig. 3 is the partial cutaway schematic view of embodiment 2.
Fig. 4 is the partial cutaway schematic view of embodiment 3.
In Fig. 2,21, valve body；22, the second O-ring seals；23, greasing channel；24, third O-ring seals；25, it prevents fires
Circle；26, the second thrust spring；27, floating valve seat；28, third level sealing ring；29, gland；210, bolt；211, the first thrust
Spring；212, the first O-ring seals；213, first order seal receptacle；214, second level sealing ring；215, sphere；216, support base；
217, fourth stage seal receptacle.
In Fig. 3,31, valve body；32, the second O-ring seals；36, the second thrust spring；37, floating valve seat；39, gland；
310, bolt；311, the first thrust spring；312, the first O-ring seals；313, first order seal receptacle；314, the second level seals
Circle；315, sphere；317, fourth stage seal receptacle.
In Fig. 4,41, valve body；42, the second O-ring seals；46, the second thrust spring；47, floating valve seat；48, the third level
Sealing ring；49, gland；410, bolt；411, the first thrust spring；412, the first O-ring seals；413, first order seal receptacle；
415, sphere；417, fourth stage seal receptacle.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
A kind of multi-stage sealed valve seat of pipeline ball-valve, including valve body, the sphere positioned at valve inner, cylindric float trap
Seat, first order seal receptacle, second level sealing ring, the first thrust spring and the second thrust spring；First order seal receptacle, which is located at, to float
The internal edge of valve seat, one end of the first thrust spring are located in the circle groove inside floating valve seat, the first thrust spring
The other end is resisted against on first order seal receptacle, and the other end of first order seal receptacle is resisted against on sphere；Second level sealing ring is inlayed
It in floating valve seat and is pressed on the outside of first order seal receptacle, the edge of second level sealing ring is resisted against on sphere；Second thrust
One end of spring is located in a circle groove of valve inner, and the other end of the second thrust spring is resisted against on floating valve seat.At this
In invention, high molecular material such as nylon or metal material can be used to seal as the first order for first order seal receptacle, and the second level is close
High molecular material such as rubber seal etc. can be used in seal, and cross sectional shape is triangle, circle, rectangular or other shapes.The
One thrust spring is helical spring, leaf spring, butterfly spring, ring waveform spring or steel wire deformed spring.
By the multi-stage sealed valve seat of the present embodiment and valve assembly after, after medium enters runner, the second thrust spring and
Medium pushes dynamic floating valve seat, fits closely the spherical surface of second level sealing ring and sphere, provides the initial of a floating valve seat
Sealed pressure, and compressive deformation is generated, prevent gas medium from passing through.First thrust spring pushes first order seal receptacle and sphere tight
Closely connected conjunction prevents medium and solid particle from entering the cavity of second level sealing ring.It has both sealing function and purging system solid
The double action of particle is that one kind has both sealing and cleans dual function sealing structure to guarantee that secondary seal is not damaged.
The present invention does not provide diagram, and it does not include the fourth stage that specific structure, which can refer to the apokoinou construction part in Fig. 2-Fig. 4,
Seal receptacle.
Embodiment 2
A kind of multi-stage sealed valve seat of pipeline ball-valve, referring to Fig. 3, including the sphere 315 inside valve body 31, valve body 31, floating
Valve seat 37, first order seal receptacle 313, second level sealing ring 314, fourth stage seal receptacle 317, the first thrust spring 311 and second
Thrust spring 36, first order seal receptacle 313 are located at the internal edge of floating valve seat 37, and one end of the first thrust spring 311 is located at
In a circle groove inside floating valve seat 37, the other end of the first thrust spring 311 is resisted against on first order seal receptacle 313, the
The other end of primary seal seat 313 is resisted against on sphere 315.Second level sealing ring 314 is embedded in floating valve seat 37 and presses
In 313 outside of first order seal receptacle, the edge of second level sealing ring 314 is resisted against on sphere 315.The one of second thrust spring 36
End is located in the circle groove inside valve body 31, and the other end of the second thrust spring 36 is resisted against on floating valve seat 37.The present invention
First order seal receptacle 313 can be used high molecular material such as nylon or metal material as the first order seal, the fourth stage sealing
The sealing structures that seat 317 forms for metal or multilayer material, such as one layer of metal, one layer of PTFE plastics are alternately arranged, have five to
Nine layers.First thrust spring 311 is helical spring, leaf spring, butterfly spring, ring waveform spring or steel wire deformed spring.First
If grade seal receptacle 313 and fourth stage seal receptacle 317 all using metal material, form a second level metal sealing valve seat,
It can be in the applications for needing metal sealing.
It further, further include discoid gland 39, gland 39 is placed in 37 end of floating valve seat and is compressed by bolt 310
On floating valve seat 37.
Embodiment 3
A kind of multi-stage sealed valve seat of pipeline ball-valve, referring to fig. 4, including the sphere 415 inside valve body 41, valve body 41, floating
Valve seat 47, first order seal receptacle 413, third level seal receptacle 48, fourth stage seal receptacle 417, the first thrust spring 411 and second push away
Power spring 46, first order seal receptacle 413 are located at the internal edge of floating valve seat 47, and one end of the first thrust spring 411 is located at floating
In a circle groove inside dynamic valve seat 47, the other end of the first thrust spring 411 is resisted against on first order seal receptacle 413, and first
The other end of grade seal receptacle 413 is resisted against on sphere 415.One end of second thrust spring 46 is located at the circle inside valve body 415
In groove, the other end of the second thrust spring 46 is resisted against on floating valve seat 47.First order seal receptacle 413 of the invention can be used
High molecular material such as nylon or metal material are sealed as the first order, and high molecular material such as rubber can be used in third level sealing ring 48
Glue sealing ring etc., cross sectional shape are triangle, circle, rectangular or other shapes.Fourth stage seal receptacle 417 is metal or multilayer
The sealing structure of material composition, such as one layer of metal, one layer of PTFE plastics are alternately arranged, and have five to nine layers.First thrust spring
411 be helical spring, leaf spring, butterfly spring, ring waveform spring or steel wire deformed spring.A soft and hard seal group can be formed
Valve seat is closed, it can be in application of special occasions.
Sealing grade is further increased as to the present embodiment, second level sealing ring, same other embodiments can also be increased
In position, second level sealing ring is embedded in floating valve seat and is pressed on the outside of first order seal receptacle, second level sealing ring
Edge is resisted against on sphere.
Embodiment 4
A kind of multi-stage sealed valve seat of pipeline ball-valve further includes referring to fig. 2 the third level sealing ring on the basis of embodiment 2
28, third level sealing ring 28 is embedded in the circle groove inside the floating valve seat 27 of 214 top of second level sealing ring, the third level
The edge of sealing ring 28 is resisted against on sphere 215.High molecular material such as rubber seal etc. can be used in third level sealing ring 28,
Cross sectional shape is triangle, circle, rectangular or other shapes.It further include greasing channel 23, greasing channel 23 includes across valve body
21 several radial passages and several axial passages being connected to radial passage, the other end of axial passage lead to sphere 215
Surface.Floating valve seat 27, third level sealing ring 28, sphere 215, is one complete between greasing channel 23 at second level sealing ring 214
Closed stop-leak compound injects cavity.
After the multi-stage sealed valve seat of the present embodiment and valve assembly, after medium enters fluid channel, the second thrust bullet
Spring 26 and medium push dynamic floating valve seat 27, keep third level sealing ring 28 and second level sealing ring 214 and the spherical surface of sphere 215 tight
Closely connected conjunction prevents gas medium from passing through, and then provides a reliable sealing.Meanwhile medium enters floating valve seat 27 and
Annular space between primary seal seat 212 push first order seal receptacle 213 with sphere 215 is closer is bonded, provide and seal simultaneously
Solid particle is prevented to pass through.
Further, close equipped with the first O shape in a circle groove of the floating valve seat 27 of 213 outer cylinder of first order seal receptacle
Seal 212 is for sealing first order seal receptacle 213 and floating valve seat 27.It is set respectively on 27 outer cylinder of floating valve seat in valve body 21
There are the second O-ring seals 22 and third O-ring seals 24.Second O-ring seals 22 prevent medium from entering greasing channel 23, and
Prevent stop-leak compound from entering fluid channel.Under the effect of medium power, third O-ring seals 24 provide floating valve seat 27 and valve body 21
Between sealing.
Further, 27 outer cylinder of floating valve seat between the second O-ring seals 22 and third O-ring seals 24 is equipped with
Fire-protection ring 25, provides fire proof seal between floating valve seat 27 and valve body 21, and carbon seal ring can be used in fire-protection ring 25.
It further, further include cylindrical support base 216, support base 216 is embedded in the inclined-plane of floating valve seat 27, is located at
Between second O-ring seals 22 and third O-ring seals 24, and it is in contact with sphere 215.After medium enters runner, first
Thrust spring 211 and medium push dynamic floating valve seat 27 and are in contact with sphere 215, and support base 216 prevents its excessive contact, avoid
The abrasion of floating valve seat 27 and sphere 215.
In long-term switching process, if entrained solid particle flies into second level sealing ring once in a while in conveying gas,
Second level sealing ring prevents solid particle from passing through, and has both sealing function and cleans the dual function of solid particle, ensures lower third
The sealing function of grade sealing ring.This is a multi-stage protection system, ensures the safe operation of pipeline.Just in case micro leakage, tight
In a hurry in disconnected situation, stop-leak compound is injected in closed cavity to the ball for arriving sphere 215 by the greasing channel 23 in floating valve seat
Face, forms a high pressure liquid body cavity, and stop-leak compound pressure is higher than pressure medium, belongs to isolation, pressure seal principle, can completely every
The leakage of exhausted air provides a reliable feeding seal approach.It therefore, include that the first order seals the present invention is to provide one
Seat 212, second level sealing ring 214, third level sealing ring 28 and the in emergency circumstances closed quadruple sealing device of greasing.
The multi-stage sealed valve seat of the present embodiment, in the gas transmission pipeline with solid particle, being to solve pipeline ball
The effective means of valve leakage.Compared with prior art, existing sealing structure is a soft seal, and one kind of the present embodiment is used for
The multi-stage sealed valve seat of pipeline ball-valve is level Four sealing structure, injects stop-leak compound in case of emergency to ensure natural gas line
Safe operation.First order seal receptacle 212 seals the semihard of metal using high molecular material or metal material, for example, by using one
Sealed nylon circle seals as semihard of the level-one nylon to metal with sphere-contact, solid particle is prevented to enter next stage sealing
Cavity.Second level sealing ring 214, third level sealing ring 28 high molecular material such as rubber etc. relatively soft seal, fourth stage sealing
Circle 217 seals the semihard of sphere metal for nylon or multiple-layer metal and PTFE plastic composition, very reliable.For example, by using
One triangle rubber seal and sphere-contact prevent gas medium from revealing as second level soft seal.Using another triangle
Shape rubber seal and sphere-contact prevent gas medium from revealing as three-level soft seal.In long-term use, solid particle has
First order seal receptacle 212, second level sealing ring 214 and third level sealing ring 28 may be abraded simultaneously, even if such case occurs
A possibility that it is very low, but in emergency circumstances just in case micro leakage occurs, the stop-leak compound injection canal provided is one totally enclosed
Cavity, it is an isolation, pressure seal principle that in the cavity, the pressure of stop-leak compound is higher than pipeline pressure medium to stop-leak compound.It is close
Sealing rouge injection is a kind of pressure forced seal, provides and a kind of meets the closed functional requirement of pipeline ball-valve bubble grade.
The foregoing is merely the preferred embodiments of invention, are not intended to limit the invention, all in spirit and original of the invention
Within then, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of multi-stage sealed valve seat of pipeline ball-valve, including valve body, positioned at the sphere of the valve inner and the floating of cylindrical shape
Valve seat, which is characterized in that further include first order seal receptacle, second level sealing ring, the first thrust spring and the second thrust spring；Institute
The internal edge that first order seal receptacle is located at the floating valve seat is stated, one end of first thrust spring is located at the float trap
In a circle groove inside seat, the other end of first thrust spring is resisted against on the first order seal receptacle, and described first
The other end of grade seal receptacle is resisted against on the sphere；The second level sealing ring is embedded in the floating valve seat and is pressed in
On the outside of the first order seal receptacle, the edge of the second level sealing ring is resisted against on the sphere；Second thrust spring
One end be located at the valve inner one circle groove in, the other end of second thrust spring is resisted against the floating valve seat
On.
2. the multi-stage sealed valve seat of pipeline ball-valve according to claim 1, which is characterized in that further include third level sealing
Circle, the third level sealing ring are embedded in the circle groove inside the floating valve seat on the outside of the second level sealing ring,
The edge of the third level sealing ring is resisted against on the sphere.
3. the multi-stage sealed valve seat of pipeline ball-valve according to claim 1, which is characterized in that further include fourth stage sealing
Seat, the fourth stage seal receptacle are pressed on third level sealing ring in the end of floating valve seat, the inner ring of the fourth stage seal receptacle
Face is resisted against on the sphere.
4. according to the multi-stage sealed valve seat of the described in any item pipeline ball-valves of claims 1-3, which is characterized in that further include greasing
Channel；The greasing channel includes several radial passages and several axial directions for being connected to the radial passage across the valve body
Channel, the other end of the axial passage lead to the surface of the sphere.
5. the multi-stage sealed valve seat of pipeline ball-valve according to claim 1, which is characterized in that outside the first order seal receptacle
The first O-ring seals are equipped in one circle groove of the floating valve seat of cylinder.
6. the multi-stage sealed valve seat of pipeline ball-valve according to claim 1, which is characterized in that further include discoid pressure
Lid, the gland are placed in the end of the floating valve seat and by bolt presses on the floating valve seat；The intracorporal institute of valve
It states and is respectively equipped with the second O-ring seals and third O-ring seals on floating valve seat outer cylinder.
7. the multi-stage sealed valve seat of pipeline ball-valve according to claim 4, which is characterized in that the floating valve seat, described
Second level sealing ring, the sphere, is a totally enclosed stop-leak compound note between the greasing channel at the third level sealing ring
Enter cavity.
8. the multi-stage sealed valve seat of pipeline ball-valve according to claim 6, which is characterized in that second O-ring seals
The floating valve seat outer cylinder between the third O-ring seals is equipped with fire-protection ring.
9. the multi-stage sealed valve seat of pipeline ball-valve according to claim 6, which is characterized in that further include cylindrical support
Seat, the support base are embedded in the inclined-plane of the floating valve seat, are located at second O-ring seals and the 3rd O shape is close
Between seal, and it is in contact with the sphere.
10. the multi-stage sealed valve seat of pipeline ball-valve according to claim 2, which is characterized in that the first order seal receptacle
Material be high molecular material or metal；The cross sectional shape of the second level sealing ring be triangle, circle, it is rectangular or other
Shape；The cross sectional shape of the third level sealing ring is triangle, circle, rectangular or other shapes；First thrust spring
For helical spring, leaf spring, butterfly spring, ring waveform spring or steel wire deformed spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555178.5A CN110259981A (en) | 2019-06-25 | 2019-06-25 | A kind of multi-stage sealed valve seat of pipeline ball-valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555178.5A CN110259981A (en) | 2019-06-25 | 2019-06-25 | A kind of multi-stage sealed valve seat of pipeline ball-valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110259981A true CN110259981A (en) | 2019-09-20 |
Family
ID=67921416
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910555178.5A Pending CN110259981A (en) | 2019-06-25 | 2019-06-25 | A kind of multi-stage sealed valve seat of pipeline ball-valve |
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| CN (1) | CN110259981A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649035A (en) * | 1968-06-24 | 1972-03-14 | Texaco Inc | A selaing means for a ball valve |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN204647410U (en) * | 2015-04-13 | 2015-09-16 | 成都成高阀门有限公司 | A kind of can the MULTIPLE COMPOSITE seal valve seat structure of greasing |
| CN204692639U (en) * | 2015-06-18 | 2015-10-07 | 嘉兴五洲阀门有限公司 | A kind of oil and gas pipes all-welded ball valve |
| CN108547963A (en) * | 2018-04-28 | 2018-09-18 | 上海华托阀门自动化有限公司 | A kind of primary and secondary sealing device for pipeline ball-valve |
| CN109139965A (en) * | 2018-10-24 | 2019-01-04 | 浙江卡麦隆阀门有限公司 | A kind of superpower sealing all-welded ball valve |
| CN210716059U (en) * | 2019-06-25 | 2020-06-09 | 上海华托阀门自动化有限公司 | Multistage sealing valve seat of pipeline ball valve |
-
2019
- 2019-06-25 CN CN201910555178.5A patent/CN110259981A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649035A (en) * | 1968-06-24 | 1972-03-14 | Texaco Inc | A selaing means for a ball valve |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN204647410U (en) * | 2015-04-13 | 2015-09-16 | 成都成高阀门有限公司 | A kind of can the MULTIPLE COMPOSITE seal valve seat structure of greasing |
| CN204692639U (en) * | 2015-06-18 | 2015-10-07 | 嘉兴五洲阀门有限公司 | A kind of oil and gas pipes all-welded ball valve |
| CN108547963A (en) * | 2018-04-28 | 2018-09-18 | 上海华托阀门自动化有限公司 | A kind of primary and secondary sealing device for pipeline ball-valve |
| CN109139965A (en) * | 2018-10-24 | 2019-01-04 | 浙江卡麦隆阀门有限公司 | A kind of superpower sealing all-welded ball valve |
| CN210716059U (en) * | 2019-06-25 | 2020-06-09 | 上海华托阀门自动化有限公司 | Multistage sealing valve seat of pipeline ball valve |
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