CN109442054B - Double-seal stop valve - Google Patents
Double-seal stop valve Download PDFInfo
- Publication number
- CN109442054B CN109442054B CN201811424419.4A CN201811424419A CN109442054B CN 109442054 B CN109442054 B CN 109442054B CN 201811424419 A CN201811424419 A CN 201811424419A CN 109442054 B CN109442054 B CN 109442054B
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- conical surface
- clack
- valve clack
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 238000009991 scouring Methods 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 2
- 239000012535 impurity Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000007787 solid Substances 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
Abstract
The invention discloses a double-seal stop valve, wherein a valve seat comprises a valve seat conical surface and a valve seat annular surface arranged along the moving direction of a valve clack, the valve clack comprises a valve clack conical surface and a valve clack annular surface arranged along the moving direction of the valve clack, the valve seat conical surface and the valve clack conical surface are mutually matched to form a conical surface sealing pair, the valve seat annular surface and the valve clack annular surface are mutually matched to form an annular surface sealing pair, and the conical surface sealing pair is arranged on one side closer to an outlet cavity than the annular surface sealing pair. The sealing device has the advantages that the sealing device is provided with the double sealing pair structure, the sealing pair of the annular surface is firstly formed to be sealed in the valve closing process, the effect of reducing pressure and throttling in advance is achieved, impurities are blocked from entering the area of the sealing pair of the conical surface, a small amount of medium after throttling is recycled to sweep the sealing surface, the sealing surface is automatically cleaned, impurities are effectively prevented from being remained on the sealing surface, meanwhile, the problem that the sealing surface is not tightly closed or crushed by the valve is effectively solved, the scouring of the sealing surface by high-speed medium is avoided, and the working reliability of the stop valve is greatly improved.
Description
Technical Field
The invention relates to a stop valve, in particular to a double-seal stop valve.
Background
The opening and closing part of the stop valve is a plug-shaped valve clack, the sealing upper surface is a plane or a sea conical surface, and the valve clack moves linearly along the central line of the valve seat. The valve seat of the stop valve used at present only has one sealing surface with sealing function, when the valve is closed, the pressure difference of the medium is concentrated on the sealing surface, so that the scouring force of the medium on the sealing surface of the valve seat is larger, thereby accelerating the abrasion of the sealing surface of the valve seat and reducing the service life of the valve seat. In addition, most structures ignore damage to the sealing surface from solid particles in the medium. The impurity contains many solid particles, and when the valve was closed, the granule was very easy to clamp between the sealed face, and the pressure was hindered sealed face or was caused the valve to close inadequately, caused high-speed medium to wash the sealed face for a long time, caused the valve internal leakage.
Disclosure of Invention
The purpose of the invention is that: in order to overcome the defects of the prior art, the invention provides the double-seal stop valve with a double-seal structure and scouring resistance.
The technical scheme of the invention is as follows: including valve body, valve rod and disk seat, be equipped with the valve clack on the valve rod, the valve rod penetrates in the valve body, be equipped with inlet chamber, outlet chamber and intercommunication inlet chamber and outlet chamber's connecting chamber in the valve body, the disk seat is installed on the connecting chamber, the disk seat is including disk seat conical surface and the disk seat anchor ring that sets up along the valve clack direction of movement, the valve clack is including the valve clack conical surface and the valve clack anchor ring that sets up along the valve clack direction of movement, the disk seat conical surface forms the conical surface seal pair with the valve clack conical surface mutually supporting, the disk seat anchor ring forms the anchor ring seal pair with the valve clack anchor ring mutually supporting, the conical surface seal pair is to the anchor ring seal pair, sets up in being close to outlet chamber one side.
By adopting the technical scheme, the dual-seal auxiliary structure is adopted, the annular sealing auxiliary forms sealing firstly in the valve closing process, the effect of reducing pressure and throttling is achieved firstly, impurities are blocked from entering the area of the conical sealing auxiliary, a small amount of medium after throttling is utilized to sweep the area of the conical sealing auxiliary, impurities in the area are taken away, the sealing surface is self-cleaned, impurities are effectively prevented from being remained on the sealing surface, meanwhile, the annular sealing auxiliary reduces the pressure difference of the conical sealing auxiliary, the service life of the sealing auxiliary is prolonged, the problem that the sealing surface is not tightly closed or crushed by the valve is effectively solved, the scouring of the sealing surface by high-speed medium is avoided, and the working reliability of the stop valve is greatly improved.
The invention is further provided with: the valve seat conical surface and the valve seat ring surface as well as the valve clack conical surface and the valve clack ring surface are integrally formed.
With the adoption of the further arrangement, the manufacturing and the processing are convenient.
Still further, the present invention provides: an anti-scouring piece is arranged at the inlet cavity.
By adopting the further arrangement, the flow velocity of the high-speed medium is reduced, and the flushing of the sealing surface is avoided.
Still further, the present invention is provided with: the anti-scouring piece comprises an inlet part, a middle part and an outlet part, and a central hole penetrating through the inlet part, the middle part and the outlet part is formed in the anti-scouring piece; a plurality of axial flow channels circumferentially arranged around the central hole are formed in the inlet part and the outlet part, and the axial direction of the axial flow channels is consistent with the axial direction of the central hole; the outer wall of the middle part is provided with a ring groove for the flowing medium of the axial flow channel to pass through, the middle part is internally provided with a plurality of radial flow channels, the axial direction of the radial flow channels is perpendicular to the axial direction of the central hole, the radial flow channels are communicated with the ring groove and the central hole, and the radial flow channels are circumferentially and axially arranged around the central hole.
By adopting the further arrangement, the flow of the inlet cavity can be reduced, the flow velocity of the medium is reduced, and the flushing of the sealing surface by the high-speed medium is avoided.
Still further, the present invention is provided with: the valve cage is fixedly arranged in the connecting cavity, and the valve clack penetrates into the valve cage and forms a seal with the valve seat in the valve closing state.
By adopting the further arrangement, the valve cage can play a role in positioning and guiding the valve clack, so that the valve clack is prevented from being eccentric due to the impact of a medium, and the coaxiality of the valve rod is ensured.
Still further, the present invention is provided with: the valve cage is of a cylindrical structure, a plane passing through the axis of the valve cage is used as a distinguishing surface, the valve cage comprises a through hole part positioned on the left side of the distinguishing surface and a real wall part positioned on the right side of the distinguishing surface, a plurality of through holes communicated with the inside and the outside of the valve cage are formed in the through hole part, and the real wall part is installed on one side facing an inlet cavity.
By adopting the further arrangement, the medium flows through the solid wall part, so that the flow speed of the medium is greatly reduced, the medium is prevented from directly facing the sealing surface, and the anti-scouring effect of the sealing surface is further consolidated.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;
FIG. 3 is an enlarged schematic view of the sealing surface in the open position of the present invention;
FIG. 4 is a schematic view of the structure of the anti-scouring member of the present invention;
the valve body 1, the valve rod 2, the valve seat 3, the valve clack 4, the inlet chamber 11, the outlet chamber 12, the connecting chamber 13, the valve seat conical surface 31, the valve seat annular surface 32, the valve clack conical surface 41, the valve clack annular surface 42, the anti-scouring member 5, the inlet portion 51, the middle portion 52, the outlet portion 53, the central hole 54, the axial flow passage 511, the annular groove 521, the radial flow passage 522, the valve cage 6, the through hole portion 61, the solid wall portion 62 and the through hole 611.
Detailed Description
The double-seal stop valve as shown in fig. 1-3 comprises a valve body 1, a valve rod 2 and a valve seat 3, wherein a valve clack 4 is arranged on the valve rod 1, the valve rod 2 penetrates into the valve body 1, an inlet cavity 11, an outlet cavity 12 and a connecting cavity 13 communicated with the inlet cavity 11 and the outlet cavity 12 are arranged in the valve body 1, the valve seat 3 is arranged on the connecting cavity 13, the valve seat 3 comprises a valve seat conical surface 31 and a valve seat annular surface 32 arranged along the moving direction of the valve clack 4, the valve clack 4 comprises a valve clack conical surface 41 and a valve clack annular surface 42 arranged along the moving direction of the valve clack 4, the valve seat conical surface 31 and the valve clack conical surface 41 are mutually matched to form a conical surface sealing pair, the valve seat annular surface 32 and the valve clack annular surface 42 are mutually matched to form an annular surface sealing pair, the conical surface sealing pair is arranged on one side closer to the outlet cavity 12 compared with the annular surface sealing pair, the whole valve is vertically arranged, and the conical surface sealing pair is positioned below the annular surface sealing pair. The annular surface sealing pair and the conical surface sealing pair are both surface sealing, so that the sealing performance is improved. The flap annulus 42 and the valve seat annulus 32 are coaxially disposed with the axis of the valve stem 2. The valve seat conical surface 31, the valve seat annular surface 32, the valve clack conical surface 41 and the valve clack annular surface 42 are integrally formed, so that the manufacturing is more convenient. The valve clack conical surface 31, the valve clack annular surface 32, the valve seat conical surface 41 and the valve seat annular surface 42 are all made of surfacing alloy.
In the valve closing process, the valve clack 4 moves downwards under the action of the valve rod 2, the valve clack 4 stretches into the valve seat 3, the valve seat annular surface 42 and the valve clack annular surface 32 are made to be close to each other in advance and form an annular surface sealing pair, medium circulation is basically blocked, impurities are difficult to reenter an area below the annular surface sealing pair, a small amount of medium after throttling is reused to carry away the medium in the area, and then the valve rod moves downwards continuously, so that the valve seat conical surface 41 and the valve clack conical surface 31 form a conical surface sealing pair, damage of impurities to a sealing surface is avoided, and double sealing and anti-scouring effects are realized.
As shown in fig. 4, the anti-scouring element 5 is fixedly arranged at the inlet cavity 11; the anti-scouring member 5 has an I-shaped section through the axis thereof, and comprises an inlet part 51, a middle part 52 and an outlet part 53, and a central hole 54 penetrating through the inlet part 51, the middle part 52 and the outlet part 53 is arranged in the anti-scouring member 5; the inlet part 51 and the outlet part 52 are respectively provided with a plurality of axial flow channels 511 which are circumferentially arranged around the central hole 54, and the axial direction of the axial flow channels 511 is consistent with the axial direction of the central hole 54; the outer wall of the middle part 52 is provided with an annular groove 521 for the medium flowing into the axial flow passage 511 to pass through, the middle part 52 is internally provided with a plurality of radial flow passages 522, the axial direction of the radial flow passages 522 is perpendicular to the axial direction of the central hole 54, the radial flow passages 522 are communicated with the annular groove 521 and the central hole 54, the plurality of radial flow passages 522 are circumferentially and axially arranged around the central hole 54, namely, the middle part surrounding the circumferential position of the central hole 54 is provided with a plurality of radial flow passages 522, and the axial position surrounding the central hole 54 is provided with a plurality of radial flow passages 522. The flow velocity of the high-speed medium is reduced, and the flushing of the sealing surface is avoided. The medium flows into the inlet cavity 11, flows into the central hole 54 and the axial flow passage 511 of the inlet part 51, the medium flowing through the axial flow passage 511 of the inlet part 51 enters the annular groove 521, the radial flow passage 522 provides a medium flow passage between the central hole 54 and the annular groove 521, the medium flow rhythm in the central hole 54 and the annular groove 521 is disturbed, the medium flow speed is reduced, the medium flow rate is reduced, the medium flow is reduced, and the flushing of a sealing surface by high-speed medium is avoided.
The valve cage 6 is fixedly arranged in the connecting cavity 13, and in the valve closing state, the valve clack 4 penetrates into the valve cage 6 and forms a seal with the valve seat 3. The cage 6 has a cylindrical structure, taking a plane passing through the axis of the cage 6 as a division surface, the cage 6 comprises a through hole part 61 positioned at the left side of the division surface and a solid wall part 62 positioned at the right side of the division surface, and the through hole part 61 is provided with a plurality of through holes 611 for communicating the inside and the outside of the cage 6 and is in the radial direction of the cage 6. When the cage 6 is installed, the solid wall 62 is installed to face the inlet chamber 11 side, so that the solid wall 62 directly faces the inlet chamber 11 to be impacted by the medium. In the process that the inlet cavity 11 enters the medium, the medium directly impacts the solid wall part 62, the medium is shunted by the arc surface of the solid wall part 62 and enters the valve cage 6 in a roundabout way through the through hole 611, so that the straight surface impact of the medium on the sealing surface is blocked, and the anti-scouring effect is more obvious.
Claims (4)
1. The utility model provides a double-seal stop valve, including valve body, valve rod and disk seat, be equipped with the valve clack on the valve rod, the valve rod penetrates in the valve body, be equipped with inlet chamber, outlet chamber and the connecting chamber in intercommunication inlet chamber and outlet chamber in the valve body, the disk seat is installed on the connecting chamber, its characterized in that: the valve seat comprises a valve seat conical surface and a valve seat annular surface arranged along the moving direction of the valve clack, the valve clack comprises a valve clack conical surface and a valve clack annular surface arranged along the moving direction of the valve clack, the valve seat conical surface and the valve clack conical surface are mutually matched to form a conical surface sealing pair, the valve seat annular surface and the valve clack annular surface are mutually matched to form an annular surface sealing pair, and the conical surface sealing pair is arranged on one side closer to the outlet cavity relative to the annular surface sealing pair;
the anti-scouring component is arranged at the inlet cavity and comprises an inlet part, a middle part and an outlet part, and a central hole penetrating through the inlet part, the middle part and the outlet part is formed in the anti-scouring component; a plurality of axial flow channels circumferentially arranged around the central hole are formed in the inlet part and the outlet part, and the axial direction of the axial flow channels is consistent with the axial direction of the central hole; the outer wall of the middle part is provided with a ring groove for the flowing medium of the axial flow channel to pass through, the middle part is internally provided with a plurality of radial flow channels, the axial direction of the radial flow channels is perpendicular to the axial direction of the central hole, the radial flow channels are communicated with the ring groove and the central hole, and the radial flow channels are circumferentially and axially arranged around the central hole.
2. A dual seal shut-off valve according to claim 1 wherein: the valve seat conical surface and the valve seat ring surface as well as the valve clack conical surface and the valve clack ring surface are integrally formed.
3. A double seal shut-off valve according to claim 1 or 2, wherein: the valve clack penetrates into the valve cage and forms a seal with the valve seat in the closed state of the valve.
4. A dual seal shut-off valve according to claim 3 wherein: the valve cage is of a cylindrical structure, a plane passing through the axis of the valve cage is used as a distinguishing surface, the valve cage comprises a through hole part positioned on the left side of the distinguishing surface and a real wall part positioned on the right side of the distinguishing surface, a plurality of through holes communicated with the inside and the outside of the valve cage are formed in the through hole part, and the real wall part is arranged on one side facing an inlet cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424419.4A CN109442054B (en) | 2018-11-27 | 2018-11-27 | Double-seal stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424419.4A CN109442054B (en) | 2018-11-27 | 2018-11-27 | Double-seal stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442054A CN109442054A (en) | 2019-03-08 |
| CN109442054B true CN109442054B (en) | 2024-03-29 |
Family
ID=65554894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811424419.4A Active CN109442054B (en) | 2018-11-27 | 2018-11-27 | Double-seal stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442054B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310669Y (en) * | 2008-04-23 | 2009-09-16 | 哈电集团哈尔滨电站阀门有限公司 | Anti scour disconnecting valve |
| CN202171006U (en) * | 2011-06-16 | 2012-03-21 | 伯特利阀门集团有限公司 | Abrasion-proof and scouring-proof stop valve |
| CN105587872A (en) * | 2016-02-29 | 2016-05-18 | 王照业 | Floating spherical cap type angle valve |
| CN207364293U (en) * | 2017-10-30 | 2018-05-15 | 浙江创享阀门科技有限公司 | The shut-off valve of dual-seal |
| CN209430783U (en) * | 2018-11-27 | 2019-09-24 | 浙江双华阀门科技有限公司 | A kind of double-sealed stop valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007014282A1 (en) * | 2007-03-19 | 2008-10-02 | Südmo Holding GmbH | Valve for separating product media in pipelines of a product-carrying system |
-
2018
- 2018-11-27 CN CN201811424419.4A patent/CN109442054B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310669Y (en) * | 2008-04-23 | 2009-09-16 | 哈电集团哈尔滨电站阀门有限公司 | Anti scour disconnecting valve |
| CN202171006U (en) * | 2011-06-16 | 2012-03-21 | 伯特利阀门集团有限公司 | Abrasion-proof and scouring-proof stop valve |
| CN105587872A (en) * | 2016-02-29 | 2016-05-18 | 王照业 | Floating spherical cap type angle valve |
| CN207364293U (en) * | 2017-10-30 | 2018-05-15 | 浙江创享阀门科技有限公司 | The shut-off valve of dual-seal |
| CN209430783U (en) * | 2018-11-27 | 2019-09-24 | 浙江双华阀门科技有限公司 | A kind of double-sealed stop valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109442054A (en) | 2019-03-08 |
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