CN102401149B - Pressure regulating compensation single valve seat two-way sealing device - Google Patents
Pressure regulating compensation single valve seat two-way sealing device Download PDFInfo
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- CN102401149B CN102401149B CN201110359591.8A CN201110359591A CN102401149B CN 102401149 B CN102401149 B CN 102401149B CN 201110359591 A CN201110359591 A CN 201110359591A CN 102401149 B CN102401149 B CN 102401149B
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- pressure regulating
- valve seat
- seal ring
- hole
- stuffing box
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Abstract
The invention discloses a pressure regulating compensation single valve seat two-way sealing device. The device comprises a pressure regulating compensation device, a single body two-way sealing valve seat and a structural wall fixing wall; the single body two-way sealing valve seat can realize equivalent value two-way sealing and difference two-way sealing; the pressure regulating compensation device can regulate the sealing pressure of a ball valve on line; facing a lip side of the ball valve, a loop is designed to be a small-scale inclined cut surface or cambered surface; under the condition that a sealing ring is burnt, the lip side of the loop is contacted with the ball valve so as to establish the emergent sealing between metal and metal; meanwhile, the pressure regulating compensation single valve seat two-way sealing device has the advantages of compact structure and is convenient to run and maintain.
Description
Technical field
The present invention relates to rotary type mechanical device sealing technique, relate in particular to a kind of pressure regulating compensation single valve seat two-way sealing device.
Background technique
State, inside and outside ball valve two way sealed function adopt two separate valve seats one in front and one in back arranging along the working medium flow direction to realize conventionally at present.This typical valve seat is mainly made up of sealing seat, seal ring, seal ring, spring assembly etc., and all parts are all assemblied in valve inner, and spring passes to seal ring in compressive state and by this elastic force F1 by sealing seat always at work; This outer fluid acts on sealing seat and on cross section, is producing " annular " fluid force " F perpendicular to MEDIA FLOW with seal ring
2", F
1and F
2acting in conjunction is set up essential seal pressure (being the pressure in unit area of contact) to realize sealing in seal ring and at itself and spheroid contacting point.Although this valve seat can be realized sealing function under normal circumstances preferably, defect is:
1) this valve seat can only be realized unidirectional sealing;
2) realize two way sealed if want and must arrange again a set of valve seat to the opposite side at spheroid along MEDIA FLOW, cause the increasings such as valve general structure size, weight, assembling maintenance difficulties;
3), once after this valve seat assembling, because of being positioned at valve inner, seal pressure cannot on-line control, and compensation ability is poor, use or short-term non-normal use cause elastic force F after ring wear for a long time
1diminish, the general easy medium that causes is revealed or sealability reduction, cannot meet the applications that seal request is higher, and later maintenance also must can be carried out operation after valve dismounting, and workload is large and inconvenient.
Summary of the invention
In view of this, the invention provides one can be realized two way sealed, can be adjusted online sealing load and compact structure by a valve seat, is convenient to the pressure regulating compensation single valve seat two-way sealing device of operation and maintenance.
Pressure regulating compensation single valve seat two-way sealing device of the present invention, comprise the solid wall body of plural pressure regulating type compensation device, monomer-type two way sealed valve seat and structure, wherein, the two ends of the solid wall body of structure connecting tube respectively, its outer surface is circumferentially uniformly distributed two or more pressure regulating type compensation devices, the inner monomer-type two way sealed valve seat of installing; On the solid wall body of structure, have through hole in the position corresponding with each pressure regulating type compensation device, make the lower part of pressure regulating type compensation device through the solid wall body of structure, act on monomer-type two way sealed valve seat, its sealing load is regulated;
Pressure regulating type compensation device comprises regulator housing, swing arm, slide-bar, mandrel, adjusting nut, positioning rod and spring element: regulator housing is hollow cylindrical structure, is processed with screw thread, middle part has a circular hole on the inwall of its one end; Adjusting nut external process has screw thread, and install with the screw-thread fit of regulator inner walls, a blind hole of the inner processing of adjusting nut, the positioning rod of blind hole bottom centre position fixed cylinder shape, spring element is placed in the annulus between blind hole and positioning rod; Slide-bar is round column structure, at one end have diameter than the blind hole of positioning rod slightly larger in diameter, positioning rod can be put in this blind hole, radially be processed with through hole at slide-bar middle part, slide-bar coordinates vertically and is arranged on regulator enclosure interior, the end that slide-bar has blind hole one end contacts with spring element, and the through hole of slide-bar communicates with the circular hole of regulator housing; The circle hole sleeve that swing arm middle part has is contained on the mandrel being connected with the solid wall body of structure, and can rotate around mandrel; Swing arm one end is stretched in the through hole of slide-bar and is contacted near the wall of a side with through hole adjusting nut, and the other end contacts with the stuffing box gland of monomer-type two way sealed valve seat through the solid wall body of structure;
Monomer-type two way sealed valve seat comprises gimbal, stuffing box gland, kink, seal ring, auxiliary seal ring E and two auxiliary seal ring D; Stuffing box gland is cascade tubular structure, and its outer wall all becomes stepped with inwall: the right half part of outer wall has two continuous ladder surfaces, is respectively the first ladder surface 12a and second-order tread 12b; Inwall left-half has two continuous ladder surfaces, is respectively the 3rd ladder surface 12c and quadravalence tread 12d; Between the inwall in the solid wall body through hole of stuffing box gland outer wall left-half and structure left side, leave gap, this gap can make working medium flow into space, swing arm place; Mandrel acts on the end face forming stuffing box gland outer wall left-half and recessed right half part through one end of the solid wall body through hole of structure; Kink is cascade tubular structure, is nested in the inside of stuffing box gland, and two ladder surfaces of its stepped outer wall coordinate installation with the 3rd ladder surface 12c and quadravalence tread 12d respectively; Between the 3rd ladder surface 12c of kink and stuffing box gland, auxiliary seal ring E is installed; The inwall of kink and the curved surface that the region processing Cheng Keyu valve ball outer surface of its left end joint coordinates, have axial annular recess in the close end of this curved surface, and seal ring is installed in it, and seal ring contacts with valve ball extruding; Gimbal 9 is that one end is with the tubular structure of holding along 9a, its end is along 9a towards cylinder inner bulge, gimbal is sleeved between the first ladder surface 12a of stuffing box gland outer wall and the inwall on the solid wall body through hole of structure right side, end, along the right-hand end that is stuck in stuffing box gland, is installed auxiliary seal ring C between the solid wall body inwall of gimbal outer wall and structure; Two auxiliary seal ring D are installed between the surface of contact of gimbal inwall and stuffing box gland outer wall; The external diameter of described gimbal is identical with the radius of the 3rd ladder surface 12c of stuffing box gland.
Between the solid wall body surface of contact of described pressure regulating type compensation device and structure, auxiliary seal ring B is installed.
Between the solid wall body surface of contact of described monomer-type two way sealed valve seat and structure, auxiliary seal ring C is installed.
Described slide-bar is near between the outer wall at two ends and the surface of contact of regulator inner walls, an auxiliary seal ring A being respectively installed.
Described pressure regulating type compensation device also comprise be sleeved on positioning rod and be placed in spring element and slide-bar between all carry pad.
The invention has the beneficial effects as follows:
(1) pressure regulating compensation single valve seat two-way sealing device of the present invention can be realized equivalent two way sealed and difference two way sealed: forward when sealing by changing the combo relation of seal ring between radius and the kink external diameter of the seal point of the top of valve ball, while oppositely sealing by change seal ring the combo relation between radius and the kink internal diameter of the seal point bottom of valve ball, and produce " piston effect power " with hydrodynamic pressure coupling, the pretightening force F simultaneously producing with voltage regulating compensating device
xacting in conjunction produces sealing load.Combo is related to difference, and positive and negative both direction sealing load is also different, and then realizes equivalence or difference sealing;
(2) pressure regulating type compensation device has elastic compensating ability, and can be designed to outside pressure regulating type structure according to user demand, utilize the principle of " elasticity loading, lever transmission ", when adjusting nut rotation, change inner elastomeric deformed element amount, drive swing arm to rotate around mandrel, and by the appropriate design swing arm arm of force, realizing the ratio of elasticity pretightening force amplifies, and then complete seal pressure on-line control and have sealing compensation function simultaneously concurrently, operation, easy to maintenance, reliability is high;
(3) kink is designed to small scale scarf or cambered surface towards " the lip limit " of " valve ball ", under seal ring burns situation, this device can drive swing arm to advance stuffing box gland and kink by the adjusting nut of pressure regulating type compensation device, and make " the lip limit " of kink contact the emergent sealing of setting up metal to metal with valve ball, effectively reduce working medium and reveal the harmfulness causing.
Brief description of the drawings
Fig. 1 is partial structurtes schematic diagram of the present invention;
Wherein, 1-auxiliary seal ring A, 2-regulator housing, 3-swing arm, the solid wall body of 4-structure, 5-slide-bar, 6-auxiliary seal ring B, 7-mandrel, 8-auxiliary seal ring C, 9-gimbal, 10-auxiliary seal ring D, 11-valve ball, 12-stuffing box gland, 13-kink, 14-seal ring, 15-auxiliary seal ring E, 16-adjusting nut, 17-positioning rod, 18-spring element, 19-all carries pad.
Embodiment
For understanding better the present invention, below in conjunction with drawings and Examples, the invention will be further described:
Pressure regulating compensation single valve seat two-way sealing device of the present invention, comprise the solid wall body 4 of two or more pressure regulating type compensation devices, monomer-type two way sealed valve seat and structure, wherein, the solid wall body 4 of structure is solid of rotation, for being connected with two joints of pipeline, its outer surface is circumferentially uniformly distributed two or more pressure regulating type compensation devices, the inner monomer-type two way sealed valve seat of installing, between the solid wall body 4 of monomer-type two way sealed valve seat left-half and structure, leave gap, right half part coordinates installation with the solid wall body 4 of structure; On the solid wall body of structure, on the position corresponding with each pressure regulating type compensation device, be designed to boss shape, for being fixedly connected with pressure regulating type compensation device, boss middle part has through hole, make the lower part of pressure regulating type compensation device through the solid wall body 4 of structure, act on monomer-type two way sealed valve seat, its sealing load is regulated; Between the solid wall body surface of contact of pressure regulating type compensation device and structure, auxiliary seal ring B6 is installed;
Pressure regulating type compensation device comprises regulator housing 2, swing arm 3, slide-bar 5, mandrel 7, adjusting nut 16, positioning rod 17, spring element 18, all carries pad 19 and two auxiliary seal ring A4: regulator housing 2 is hollow cylindrical structure, is processed with screw thread, middle part has a circular hole on the inwall of its one end; Adjusting nut 16 external process have screw thread, and install with the screw-thread fit of regulator housing 2 inwalls, the blind hole of certain depth is processed in adjusting nut 16 inside, the positioning rod 17 of blind hole bottom centre position fixed cylinder shape, spring element 18 is placed in the annulus between blind hole and positioning rod 17; After compression spring element, will all carry pad 19 and be sleeved on positioning rod 17, be placed between spring element 18 and slide-bar end face so that all carry pad 19, for the elastic force of spring element 18 being evenly applied to slide-bar 5 end faces; Slide-bar 5 is round column structure, at one end have diameter than the blind hole of positioning rod 17 slightly larger in diameter, positioning rod 17 can be put in this blind hole, radially be processed with through hole at slide-bar middle part, slide-bar coordinates vertically and is arranged on regulator housing 2 inside, the end that slide-bar 5 has blind hole one end contacts with spring element 18, and the through hole of slide-bar 5 communicates with the circular hole of regulator housing 2; Slide-bar 5 is near being separately installed with an auxiliary seal ring A4 between the outer wall at two ends and the surface of contact of regulator housing 2 inwalls; The circle hole sleeve that swing arm 3 middle parts have is contained on the mandrel 7 being connected with the solid wall body of structure, and can rotate around mandrel 7; Swing arm 3 one end are stretched in the through hole of slide-bar 5 and are contacted near the wall of adjusting nut 16 1 sides with through hole, and the other end contacts with the stuffing box gland 12 of monomer-type two way sealed valve seat through the solid wall body 4 of structure;
Monomer-type two way sealed valve seat comprises gimbal 9, stuffing box gland 12, kink 13, seal ring 14, two auxiliary seal ring D10 and auxiliary seal ring E15; Stuffing box gland 12 is cascade tubular structure, and the right half part of outer wall has two continuous ladder surfaces, is respectively the first ladder surface 12a and second-order tread 12b; Inwall left-half has two continuous ladder surfaces, is respectively the 3rd ladder surface 12c and quadravalence tread 12d; Between the inwall in the solid wall body of stuffing box gland 12 outer wall left-half and structure 4 through hole left sides, leave gap, this gap can make working medium flow into swing arm 3 spaces, place; Mandrel 7 acts on the end face stuffing box gland 12 outer wall left-half and second-order tread 12b through one end of the solid wall body 4 of structure; Kink 13 is cascade tubular structure, is nested in the inside of stuffing box gland 12, and two ladder surfaces of its stepped outer wall coordinate installation with the 3rd ladder surface 12c and quadravalence tread 12d respectively; Between kink 13 and the 3rd ladder surface 12c, auxiliary seal ring E15 is installed, radius corresponding to the 3rd ladder surface 12c is designated as d
1; The inwall of kink 13 and the curved surface that region processing Cheng Keyu valve ball 11 outer surfaces of its left end joint coordinate, have axial annular recess in the close end of this curved surface, and seal ring 14 is installed in it, contacts with valve ball 11 extruding; Seal ring 14 is designated as D with valve ball 11 point of contact topmost
2, corresponding radius is designated as d
2; Seal ring 14 is designated as D with valve ball 11 point of contact bottom
3, corresponding radius is designated as d
3; Gimbal 9 tubular structure along 9a that is one end with end, its end is along 9a towards cylinder inner bulge; Gimbal 9 is sleeved on the first ladder surface 12a of stuffing box gland outer wall, and end is stuck in the end of stuffing box gland 12 along 9a, between the solid wall body of gimbal 9 outer walls and structure, auxiliary seal ring C8 is installed; Between gimbal 9 inwalls and stuffing box gland 12 outer walls, two auxiliary seal ring D10 are installed, gimbal 9 internal diameters are d
4; The external diameter of gimbal 9 is designated as d
5, identical with the radius of the 3rd ladder surface 12c of stuffing box gland, i.e. d
1=d
5;
Working principle is as follows:
While tightening adjusting nut 16, adjusting nut 16 feedings, compression spring element 18, thus initial tension of spring is passed to slide-bar 5 by all carrying pad 19, slide-bar 5 is moved right vertically, promote one end rotation of the swing arm 3 contacting with slide-bar 5 through-hole walls simultaneously, according to lever principle, drive swing arm 3 the other end reversing motions, by stuffing box gland 12 and kink 13, initial tension of spring passes to seal ring 14 the most at last successively; By the pretightening force of continuous Regulation spring element 18, can finally regulate the pressure of seal ring 14 to valve ball 11, thereby regulate seal pressure; If seal ring 14 burns, when seal action lost efficacy, by tightening adjusting nut 16, make the inclined-plane of kink 13 inwalls contact and push with valve ball 11, can realize the effect of emergent sealing;
In the time that pressure regulating compensation single valve seat two-way sealing device is in running order, " the piston effect power " that working medium produces automatically by monomer-type two way sealed valve seat, can realize with valve ball 11 and set up two way sealed effect, and concrete sealing principle is as follows:
(1) when forward seals, as valve ball 11 right atrial pressure P
1be more than or equal to left side pressure P
2time, now get the D on seal ring 14
2point is for seal point, selects gimbal 9 and stuffing box gland 12 2 to carry out respectively force analysis as a whole for entirety 1, kink 13 and seal ring 14;
For the entirety 1 of gimbal 9 and stuffing box gland 12, due to the seal action of auxiliary seal ring C8 and auxiliary seal ring D10, pressure is P
1working medium cannot enter in the space at swing arm 3 places, due to the gap between the solid wall body 4 of structure and stuffing box gland 12, be P and can enter pressure in this space again
2working medium, known according to force analysis, pressure is P
2working medium entirety 1 pressure is made a concerted effort is 0; Consider that again pressure is P
1working medium to entirety 1 active force: pressure P
1act on respectively on the end face that the 3rd ladder surface 12c of stuffing box gland 12 is corresponding and in its right end face of gimbal 9, because the diameter of two faces is identical, and pressure equal and opposite in direction, opposite direction, be 0 suffered making a concerted effort; Consider that entirety 2 suffered external force are: the pretightening force of spring, pressure are P
2and P
1working medium institute applied pressure be respectively:
with
entirety is 2 suffered making a concerted effort:
from the representation of making a concerted effort, due to d
1> d
2, therefore, resultant direction is for being applied to from right to left in entirety 2, and this makes a concerted effort to be applied on seal ring 14, makes to set up essential seal pressure between seal ring 14 and valve ball 11; By adjusting spring element 18 pretightening forces, and adjust d
1with d
2magnitude relationship, the i.e. size of capable of regulating seal pressure;
(2) while oppositely sealing, as valve ball 11 right atrial pressure P
1be less than or equal to left side pressure P
2time, now get the D on seal ring 14
3point for seal point, selects gimbal 9 for entirety 3, selects stuffing box gland 12, kink 13 and seal ring 14 as a whole 4, and carries out respectively force analysis:
Entirety 3 pressure that are subject to are P
2and P
1working medium institute applied pressure be respectively:
with
suffered both make a concerted effort be:
due to P
1≤ P
2, therefore, entirety 3 is suffered makes a concerted effort to the right, and it does not apply external force to entirety 4; Consider the external force that entirety 4 is suffered: pressure is P
2medium applied pressure make a concerted effort be:
pressure is P
1medium applied pressure make a concerted effort be:
bonding force is:
due to d
3> d
4, therefore, resultant direction is for being applied to from right to left in entirety 4, and this makes a concerted effort to be applied on seal ring 14, makes to set up between seal ring 14 and valve ball essential seal pressure; By adjusting spring element 18 pretightening forces, and d
3with d
4magnitude relationship, the i.e. size of capable of regulating seal pressure;
In sum, monomer-type two way sealed valve seat can be realized two way sealed.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalence of therefore doing according to the present patent application the scope of the claims changes, and still belongs to the protection domain of patent of the present invention.
Claims (4)
1. pressure regulating compensation single valve seat two-way sealing device, it is characterized in that, comprise plural pressure regulating type compensation device, monomer-type two way sealed valve seat, the solid wall body (4) of structure and valve ball (11), wherein, the two ends of the solid wall body (4) of structure connecting tube respectively, its outer surface is circumferentially uniformly distributed plural pressure regulating type compensation device, the inner monomer-type two way sealed valve seat of installing; The solid wall body (4) of structure is upper has through hole in the position corresponding with each pressure regulating type compensation device, make the lower part of pressure regulating type compensation device through the solid wall body (4) of structure, act on monomer-type two way sealed valve seat, its sealing load is regulated;
Pressure regulating type compensation device comprises regulator housing (2), swing arm (3), slide-bar (5), mandrel (7), adjusting nut (16), positioning rod (17) and spring element (18): regulator housing (2) is hollow cylindrical structure, is processed with screw thread, middle part has a circular hole on the inwall of its one end; Adjusting nut (16) external process has screw thread, and install with the screw-thread fit of regulator housing (2) inwall, a blind hole of the inner processing of adjusting nut (16), the positioning rod (17) of blind hole bottom centre position fixed cylinder shape, spring element (18) is placed in the annulus between blind hole and positioning rod (17); Slide-bar (5) is round column structure, at one end have diameter than the blind hole of positioning rod (17) slightly larger in diameter, positioning rod (17) can be put in this blind hole, radially be processed with through hole at slide-bar (5) middle part, slide-bar (5) coordinates vertically and is arranged on regulator housing (2) inside, the end that slide-bar (5) has blind hole one end contacts with spring element (18), and the through hole of slide-bar (5) communicates with the circular hole of regulator housing (2); It is upper that the circle hole sleeve that swing arm (3) middle part has is contained in the mandrel (7) being connected with the solid wall body (4) of structure, and can rotate around mandrel (7); Swing arm (3) one end is stretched in the through hole of slide-bar (5) and is contacted near the wall of adjusting nut (16) one sides with through hole, and the other end contacts with the stuffing box gland (12) of monomer-type two way sealed valve seat through the solid wall body (4) of structure;
Monomer-type two way sealed valve seat comprises gimbal (9), stuffing box gland (12), kink (13), seal ring (14), auxiliary seal ring E (15) and two auxiliary seal ring D (10); Stuffing box gland (12) is cascade tubular structure, and its outer wall all becomes stepped with inwall: the right half part of outer wall has two continuous ladder surfaces, is respectively the first ladder surface (12a) and second-order tread (12b); Inwall left-half has two continuous ladder surfaces, is respectively the 3rd ladder surface (12c) and quadravalence tread (12d); Between the inwall in solid wall body (4) through hole of stuffing box gland (12) outer wall left-half and structure left side, leave gap, this gap can make working medium flow into swing arm (3) space, place; Mandrel (7) acts on the end face forming stuffing box gland (12) outer wall left-half and recessed right half part through one end of solid wall body (4) through hole of structure; Kink (13) is cascade tubular structure, is nested in the inside of stuffing box gland (12), and two ladder surfaces of its stepped outer wall coordinate installation with the 3rd ladder surface (12c) and quadravalence tread (12d) respectively; Between the 3rd ladder surface (12c) of kink (13) and stuffing box gland (12), auxiliary seal ring E (15) is installed; The curved surface that the inwall of kink (13) coordinates with region processing Cheng Keyu valve ball (11) outer surface of its left end joint, close end at this curved surface has axial annular recess, seal ring (14) is installed in it, and seal ring (14) contacts with valve ball (11) extruding; Gimbal (9) is the tubular structure of one end with end edge (9a), its end is along (9a) towards cylinder inner bulge, gimbal (9) is sleeved between first ladder surface (12a) of stuffing box gland (12) outer wall and the inwall on the solid wall body (4) of structure through hole right side, end, along the right-hand end that is stuck in stuffing box gland (12), is installed auxiliary seal ring C (8) between solid wall body (4) inwall of gimbal (9) outer wall and structure; Between the surface of contact of gimbal (9) inwall and stuffing box gland (12) outer wall, two auxiliary seal ring D (10) are installed; The external diameter of described gimbal (9) is identical with the radius of the 3rd ladder surface (12c) of stuffing box gland (12).
2. pressure regulating compensation single valve seat two-way sealing device as claimed in claim 1, is characterized in that, between solid wall body (4) surface of contact of described pressure regulating type compensation device and structure, auxiliary seal ring B (6) is housed.
3. pressure regulating compensation single valve seat two-way sealing device as claimed in claim 1, is characterized in that, described slide-bar (5) is near between the outer wall at two ends and the surface of contact of regulator housing (2) inwall, an auxiliary seal ring A being respectively installed.
4. pressure regulating compensation single valve seat two-way sealing device as claimed in claim 1, it is characterized in that, described pressure regulating type compensation device also comprises that being sleeved on positioning rod (17) goes up and be placed in and all carry pad (19) between spring element (18) and slide-bar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110359591.8A CN102401149B (en) | 2011-11-14 | 2011-11-14 | Pressure regulating compensation single valve seat two-way sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110359591.8A CN102401149B (en) | 2011-11-14 | 2011-11-14 | Pressure regulating compensation single valve seat two-way sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102401149A CN102401149A (en) | 2012-04-04 |
| CN102401149B true CN102401149B (en) | 2014-12-10 |
Family
ID=45883642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110359591.8A Expired - Fee Related CN102401149B (en) | 2011-11-14 | 2011-11-14 | Pressure regulating compensation single valve seat two-way sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401149B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173575A (en) * | 2019-04-23 | 2019-08-27 | 亚登阀门管件有限公司 | A kind of valve seat can float the ball valve of adjustment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0763680A1 (en) * | 1995-09-14 | 1997-03-19 | NUOVO PIGNONE S.p.A. | Device for shifting the seats of a ball valve |
| CN2525320Y (en) * | 2002-02-04 | 2002-12-11 | 杜颐桂 | Small torque leak tess adjustable ball valve |
| CN2731201Y (en) * | 2004-06-08 | 2005-10-05 | 铁岭阀门(集团)特种阀门有限责任公司 | Zero friction sealed valve |
| CN2787951Y (en) * | 2005-02-07 | 2006-06-14 | 徐立维 | Sealing pressure regulator for fixed ball valve |
| CN102094992A (en) * | 2011-03-18 | 2011-06-15 | 温州科赛阀门有限公司 | Fixed ball valve for top assembling |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865377A (en) * | 1981-10-15 | 1983-04-19 | Konan Denki Kk | Ball valve |
| JP2857860B2 (en) * | 1996-06-13 | 1999-02-17 | 大明金属工業株式会社 | valve |
-
2011
- 2011-11-14 CN CN201110359591.8A patent/CN102401149B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0763680A1 (en) * | 1995-09-14 | 1997-03-19 | NUOVO PIGNONE S.p.A. | Device for shifting the seats of a ball valve |
| CN2525320Y (en) * | 2002-02-04 | 2002-12-11 | 杜颐桂 | Small torque leak tess adjustable ball valve |
| CN2731201Y (en) * | 2004-06-08 | 2005-10-05 | 铁岭阀门(集团)特种阀门有限责任公司 | Zero friction sealed valve |
| CN2787951Y (en) * | 2005-02-07 | 2006-06-14 | 徐立维 | Sealing pressure regulator for fixed ball valve |
| CN102094992A (en) * | 2011-03-18 | 2011-06-15 | 温州科赛阀门有限公司 | Fixed ball valve for top assembling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102401149A (en) | 2012-04-04 |
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Granted publication date: 20141210 Termination date: 20191114 |