CN105840857A - Rotary four-eccentricity ball valve - Google Patents
Rotary four-eccentricity ball valve Download PDFInfo
- Publication number
- CN105840857A CN105840857A CN201610412786.7A CN201610412786A CN105840857A CN 105840857 A CN105840857 A CN 105840857A CN 201610412786 A CN201610412786 A CN 201610412786A CN 105840857 A CN105840857 A CN 105840857A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- spheroid
- sealing
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a rotary four-eccentricity ball valve which comprises a valve body, an upper valve rod, a lower valve rod, a ball body, valve seats, bearings, springs, sealing rings and packing seal structures and is a rotary ball valve. The ball body is located in the valve body. The springs are arranged between the ball body and the valve seats. The valve body is provided with an end cover and a bottom cover. The valve body and the two valve seats are connected through threads. The valve rods and the ball body are also connected through threads. The sealing rings are arranged between the ball body and the valve body. The packing seal structures are arranged between the valve rods and the valve body. According to the ball valve, four eccentricity distances exist and include contact eccentricity between the centers of the valve rods and the sealing surfaces, eccentricity between the centers of the valve rods and the center of the valve body, angle eccentricity for perpendicularity of the sealing contact surfaces to the center of a valve body channel, and eccentricity which is formed between the rotation centers of the valve seats and the plain lines of the cross sections of the sealing surfaces of the valve seats and enables the engagement angle of the ball body to be adjustable. The ball valve can reduce abrasion between sealing pairs and reduce opening and closing torque, and the life of the ball valve is prolonged.
Description
Technical field
The invention belongs to agricultural machinery technological field, relate to a kind of four eccentric ball valves, particularly to a kind of eccentric ball valve that there is the abrasion reduced between sealing pair, reduce the features such as keying moment, raising ball valve life-span.
Background technology
Due to good sealing and discharge characteristic, ball valve is extensive in some sector applications, such as papermaking, natural gas, high pressure field etc..Ball valve is developed by plug valve, and its opening and closing element is a spheroid, utilizes spheroid to realize the opening and closing of valve around the axis half-twist of valve rod, can cut off, distributes and change media flow direction.Compared to butterfly valve, ball valve has minimum flow resistance, good seal performance, can be applicable in Korrosionsmedium and low-boiling point liquid, realize fast opening and closing, spherical closure member can be automatically positioned on boundary position, standard-sized sheet and fully closed time, the sealing surface of spheroid and valve seat and medium are isolated, compact conformation, lightweight, valve body is symmetrical, can bear the stress from pipeline and High Pressure Difference when closing, and the life-span is long.
All the time being in squeezed state for not eccentric ball valve, spheroid and valve seat, the stress born is big, quick abrasion, and due to the use of encapsulant so that ball valve is restricted on temperature and pressure.For single eccentric ball valve, still there is the existence of the phenomenon such as extruding, scraping, use the widest.For double-eccentric ball valve, reduce abrasion and open and close moment, eliminating certain extruding, phenomenon of swiping.For three eccentricity ball valve, on the basis of double bias, further improve air-proof condition, have good anti-leak function.In sum, although current existing eccentric ball valve has done further improvement, but there is also certain problem in pressure, temperature.
The valve base sealing loop material of ball valve is mainly polytetrafluoroethylene (PTFE), owing to polytetrafluoroethylene (PTFE) has the higher coefficient of expansion, to features such as the sensitiveness of cold flow and bad heat conductivities, design for valve base sealing, it is necessary to consider these factors, this makes the design of ball valve there is also certain problem.
In sum, in prior art there is serious wear, bear the problems such as big, the poor sealing performance of pressure in ball valve.Four eccentric designs were not mentioned at present in ball valve, in butterfly valve, only just there is the research of similar aspect, by the four eccentric designs to butterfly valve, can effectively reduce abrasion, reduce keying moment and prevent the leakage of working media, therefore four bias are designed in ball valve by the present invention.
Summary of the invention
It is an object of the invention to provide a kind of rotary four eccentric ball valves, to effectively reduce abrasion, to reduce keying moment, raising ball valve life-span, raising regulation traffic ability.
For solving above-mentioned technical problem, the concrete technical scheme that the present invention uses is as follows:
A kind of rotary four eccentric ball valves, including valve body (3), upper valve rod (10), lower valve rod (7), spheroid (8), valve seat (4), spring (1), sealing ring (2), stuffing seal (9), bolt (5), nut (6)；Spheroid (8) is positioned among valve body (3), spring (1) it is provided with between spheroid (8) and valve seat (4), valve body is provided with end cap and bottom on (3), it is connected by bolt (5) and nut (6) between valve body (3) with two valve seats (4), it is threaded connection between upper valve rod (10) and lower valve rod (7) and spheroid (8), sealing ring (2) it is provided with between spheroid (8) and valve body (3), stuffing seal (9) it is provided with between upper valve rod (10) and lower valve rod (7) and valve body (3)；Described ball valve is provided with eccentric distance, and the first bias is the bias at valve rod center and sealing contact surface, and the second bias is the bias at valve rod center and valve body center；
It is characterized in that: also include three eccentricity and the 4th bias；
Described three eccentricity is that the angle that sealing contact surface is vertical with valve channel center is eccentric；
Described 4th bias is that the centre of gyration of valve seat can make the adjustable bias of spheroid tooth matching angle with sealing ring cross section element line is formed.
Described first is eccentrically set between valve rod center contacts with sealing surface, makes sealing pair upper and lower end deviate the centre of gyration, is possible to prevent between spheroid and valve body to produce excessive compression during valve opening and closing.
Described second is eccentrically set between valve rod center and valve body center；After Open valve, spheroid can be rapidly separated valve body, reduces the abrasion between spheroid and valve body and scraping, reduces unlatching moment, thus alleviates wear phenomenon, improves life of valve.
Described three eccentricity is arranged between sealing contact surface and valve channel center；Three eccentricity changes the sealing principle of sealing pair, position seals become torsion and seal, played the sealing effectiveness of anti-leak by the contact surface pressure relying on valve seat.
What the described 4th eccentric centre of gyration for described valve seat and sealing ring cross section element line were formed makes the adjustable bias of spheroid tooth matching angle, and this angle of engagement is variable arbitrary value, the different angles of engagement can be designed according to working condition requirement, reduce the unlatching opening moment, beneficially valve.
The sealing surface weld deposit of described valve seat has hard alloy；Spheroid is welded with hard alloy with the contact surface also heap of valve body.
Described sealing ring is ramp type, and material is flexible barrier material polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) has good process based prediction model, and slip is the lowest, uses environment temperature less than 250 DEG C.
Being provided with packing seal structure between described upper valve rod and lower valve rod and valve body, this packing seal structure is made up of hold-down grid, filler pressing sleeve, filler, spacer ring and Packing seat, leaks in order to preventing the gap of the medium valve rod from movement and valve body.
Spring it is provided with, the material selection 65Mn spring steel of spring between described valve body and valve seat；Described 65Mn spring steel has the features such as intensity is high, hardness is high, wearability is good, in order to prevent from reducing between valve body and valve seat the life-span of ball valve because of severe friction.
The course of work of the present invention is as follows: ball valve of the present invention rotates 90 DEG C by upper valve rod drive spheroid and realizes valve opening or closedown, and reaches to reduce abrasion, the effect of reduction keying moment by four eccentric distances.Eccentric by first, make the symmetrical centre of valve rod center deviation sealing surface contact, can prevent ball valve core from contacting with valve seat and producing excessive compression during valve opening and closing.Eccentric by second, make valve rod center deviate valve body center, thus reduce the abrasion of valve rod and valve body, and reduce keying moment, eliminate certain extruding, phenomenon of swiping.By three eccentricity, make sealing contact surface produce a vertical angle with valve channel center eccentric, on the basis of first and second bias, further improve air-proof condition, have good anti-leak function.Eccentric by the 4th, make the center of the centre of gyration deviation sealing surface of seat of valve seat, create an angle of engagement so that valve is easier to open, reduce further and open and close moment, thus more economical, energy-conservation.
The present invention has beneficial effect.The present invention is provided with four bias, first bias is the bias that valve rod center contacts with sealing surface, second bias is the bias at valve rod center and valve body center, three eccentricity is that the sealing contact surface angle vertical with valve channel center is eccentric, and the 4th bias is that the centre of gyration of valve seat can make the adjustable bias of spheroid tooth matching angle with sealing surface of seat cross section element line is formed；The present invention, by ball valve arranges four bias, reaches the abrasion between reduction sealing pair, reduces the purpose opening and closing moment, improving the ball valve life-span.
Accompanying drawing explanation
Fig. 1 is ball valve installation diagram front view of the present invention；
Fig. 2 is ball valve installation diagram left view of the present invention；
Fig. 3 is ball valve installation diagram top view of the present invention；
Fig. 4 is ball valve installation diagram partial sectional view of the present invention；
Fig. 5 is valve seat front view of the present invention and top view；
Fig. 6 is valve seat left view of the present invention；
Fig. 7 is spheroid three-view diagram of the present invention；
Fig. 8 is valve body front view of the present invention；
Fig. 9 is valve body left view of the present invention；
Figure 10 is valve body top view of the present invention；
Figure 11 is upper valve rod part drawing of the present invention；
Figure 12 is lower valve rod part drawing of the present invention；
Figure 13 is sealing ring part drawing of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, technical scheme is described in further details.
Rotary four eccentric ball valves of one as shown in Figure 1, are mainly made up of valve body 3, upper valve rod 10, lower valve rod 7, spheroid 8, valve seat 4, spring 1, sealing ring 2, stuffing seal 9, bolt 5, nut 6；Spheroid 8 is positioned among valve body 3, spring 1 it is provided with between spheroid 8 and valve seat 4, end cap and bottom it is provided with on valve body 3, it is connected by bolt 5 and nut 6 between valve body 3 with two valve seats 4, it is threaded connection between upper valve rod 10 and lower valve rod 7 and spheroid 8, it is provided with sealing ring 2 between spheroid 8 and valve body 3, between upper valve rod 10 and lower valve rod 7 and valve body 3, is provided with stuffing seal 9；Described ball valve is provided with eccentric distance, and the first bias is the bias that valve rod center contacts with sealing surface, and the second bias is the bias at valve rod center and valve body center；Three eccentricity is that the angle that sealing contact surface is vertical with valve channel center is eccentric；4th bias is that the centre of gyration of valve seat can make the adjustable bias of spheroid tooth matching angle with sealing ring cross section element line is formed.
As shown in Figure 2, spheroid 8 is positioned among valve body 3, valve body 3 is provided with end cap and bottom, is threaded connection between upper valve rod 10 and lower valve rod 7 and spheroid 8, it is provided with sealing ring 2 between spheroid 8 and valve body 3, between upper valve rod 10 and lower valve rod 7 and valve body 3, is provided with stuffing seal 9；And three eccentricity is set between sealing contact surface and valve channel center；Three eccentricity changes the sealing principle of sealing pair, position seals become torsion and seal, played the sealing effectiveness of anti-leak by the contact surface pressure relying on valve seat；Eccentric by arranging the 4th, the centre of gyration of valve seat makes the adjustable bias of spheroid tooth matching angle with the formation of sealing surface cross section element line, and this angle of engagement is variable arbitrary value, can design the different angles of engagement according to working condition requirement, reduce the unlatching opening moment, beneficially valve.
As it is shown on figure 3, be provided with the hole of 6 a diameter of 12mm on the end cap of valve body 3, can be bolted with other parts.
As shown in Figure 4, the bottom of valve body 3 is provided with 4 through holes, can be bolted and be fixed in frame.
As shown in Figure 5, the external diameter of valve seat 4 is equal with the external diameter of valve body 3, the axis of the axis of valve seat 4 and valve body 3 is in theory on same straight line, it is ensured that in the range of certain coaxiality error, and the eccentric distance that the axis of valve seat 4 is certain with the holding of the axis of spheroid 8.
As shown in Figure 6, between valve seat 4 and valve body 3 contact surface, it is provided with through hole, is connected by bolt (5) and nut 6, be also equipped with through hole outside valve seat 4, be connected with fuselage by screw bolt and nut.
As it is shown in fig. 7, be provided with two bias, first is eccentrically set between valve rod center contacts with sealing surface, makes sealing pair upper and lower end deviate the centre of gyration, is possible to prevent between spheroid 8 and valve body 3 to produce excessive compression during valve opening and closing；Second is eccentrically set between valve rod center and valve body 8 center；After Open valve, spheroid 8 can be rapidly separated valve body 3, reduces the abrasion between spheroid 8 and valve body 3 and scraping, reduces unlatching moment, thus alleviates wear phenomenon, improves life of valve.
As shown in Figure 8, spheroid 8 is positioned among valve body 3, and deviation valve body 3 center, spheroid 8 center.
As it is shown in figure 9, be provided with through hole on valve body 3 end cap, it is connected with other elements by screw bolt and nut.
As shown in Figure 10, valve body 3 bottom is provided with through hole, is connected with other elements by screw bolt and nut.
As shown in figure 11, upper valve rod 10 top and bottom are both provided with the screw thread of M40X1.5, and the upper end of upper valve rod 10 is threaded connection with motor, provides power to upper valve rod 10；The lower end of upper valve rod 10 is threaded connection with spheroid 8, it is achieved the power transmission between upper valve rod 10 and spheroid 8.
As shown in figure 12, lower valve rod 7 top and bottom are both provided with the screw thread of M40X1.5, and the upper end of lower valve rod 7 is threaded connection with spheroid 8, it is achieved the power transmission between spheroid 8 and lower valve rod 7；The lower end of lower valve rod 7 is threaded connection with other elements, it is achieved the power transmission between lower valve rod 7 and other elements.
As shown in figure 13, the sealing ring 2 of design is ramp type, and material is flexible barrier material polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) has good process based prediction model, and slip is the lowest.Designed by the ramp type of sealing ring 2, the centre of gyration of valve seat and sealing ring cross section element line can be formed and make the adjustable bias of spheroid tooth matching angle, and this angle of engagement is variable arbitrary value, can design the different angles of engagement according to working condition requirement, reduce the unlatching opening moment, beneficially valve.
Claims (9)
1. rotary four eccentric ball valves, including valve body (3), upper valve rod (10), lower valve rod (7), spheroid (8), valve seat (4), spring (1), sealing ring (2), stuffing seal (9), bolt (5), nut (6)；Spheroid (8) is positioned among valve body (3), spring (1) it is provided with between spheroid (8) and valve seat (4), valve body is provided with end cap and bottom on (3), it is connected by bolt (5) and nut (6) between valve body (3) with two valve seats (4), it is threaded connection between upper valve rod (10) and lower valve rod (7) and spheroid (8), sealing ring (2) it is provided with between spheroid (8) and valve body (3), stuffing seal (9) it is provided with between upper valve rod (10) and lower valve rod (7) and valve body (3)；Described ball valve is provided with eccentric distance, and the first bias is the bias at valve rod center and sealing contact surface, and the second bias is the bias at valve rod center and valve body center；
It is characterized in that: also include three eccentricity and the 4th bias；
Described three eccentricity is that the angle that sealing contact surface is vertical with valve channel center is eccentric；
Described 4th bias is that the centre of gyration of valve seat can make the adjustable bias of spheroid tooth matching angle with sealing ring cross section element line is formed.
Rotary four eccentric ball valves of one the most according to claim 1, it is characterized in that: described first is eccentrically set between valve rod center contacts with sealing surface, make sealing pair upper and lower end deviate the centre of gyration, be possible to prevent between spheroid and valve body to produce excessive compression during valve opening and closing.
Rotary four eccentric ball valves of one the most according to claim 1, it is characterised in that: described second is eccentrically set between valve rod center and valve body center；After Open valve, spheroid can be rapidly separated valve body, reduces the abrasion between spheroid and valve body and scraping, reduces unlatching moment, thus alleviates wear phenomenon, improves life of valve.
Rotary four eccentric ball valves of one the most according to claim 1, it is characterised in that: described three eccentricity is arranged between sealing contact surface and valve channel center；Three eccentricity changes the sealing principle of sealing pair, position seals become torsion and seal, played the sealing effectiveness of anti-leak by the contact surface pressure relying on valve seat.
Rotary four eccentric ball valves of one the most according to claim 1, it is characterized in that: what the described 4th eccentric centre of gyration for described valve seat and sealing ring cross section element line were formed makes the adjustable bias of spheroid tooth matching angle, and this angle of engagement is variable arbitrary value, the different angles of engagement can be designed according to working condition requirement, reduce the unlatching opening moment, beneficially valve.
A kind of rotary four eccentric ball valves, it is characterised in that: the sealing surface weld deposit of described valve seat has hard alloy；Spheroid is welded with hard alloy with the contact surface also heap of valve body.
A kind of rotary four eccentric ball valves, it is characterized in that: described sealing ring is ramp type, material is flexible barrier material polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) has good process based prediction model, and slip is the lowest, use environment temperature less than 250 DEG C.
A kind of rotary four eccentric ball valves, it is characterized in that: between described upper valve rod and lower valve rod and valve body, be provided with packing seal structure, this packing seal structure is made up of hold-down grid, filler pressing sleeve, filler, spacer ring and Packing seat, leaks in order to preventing the gap of the medium valve rod from movement and valve body.
A kind of rotary four eccentric ball valves, it is characterised in that: it is provided with spring between described valve body and valve seat, the material selection 65Mn spring steel of spring；Described 65Mn spring steel has the features such as intensity is high, hardness is high, wearability is good, in order to prevent from reducing between valve body and valve seat the life-span of ball valve because of severe friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412786.7A CN105840857A (en) | 2016-06-13 | 2016-06-13 | Rotary four-eccentricity ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412786.7A CN105840857A (en) | 2016-06-13 | 2016-06-13 | Rotary four-eccentricity ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105840857A true CN105840857A (en) | 2016-08-10 |
Family
ID=56575837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610412786.7A Pending CN105840857A (en) | 2016-06-13 | 2016-06-13 | Rotary four-eccentricity ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373009A (en) * | 2018-12-20 | 2019-02-22 | 武汉海王科技有限公司 | A kind of naval vessel ball valve limit switch instruction device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346428A (en) * | 1999-02-11 | 2002-04-24 | 因戈尔夫·克莱德 | Device for ball valve |
| JP2003287148A (en) * | 2002-03-28 | 2003-10-10 | Kurimoto Ltd | Spherical valve |
| CN102207204A (en) * | 2010-03-29 | 2011-10-05 | 上海美科阀门有限公司 | High-performance eccentric ball valve |
| JP2014156912A (en) * | 2013-02-18 | 2014-08-28 | Kurimoto Ltd | Spherical valve |
| CN204459249U (en) * | 2015-01-14 | 2015-07-08 | 意阀（苏州）阀门有限公司 | A kind of three eccentricity ball valve |
| CN204459248U (en) * | 2015-01-05 | 2015-07-08 | 浙东高中压阀门有限公司 | The eccentric slurry pump control valve of C shape four |
| CN105003667A (en) * | 2015-07-07 | 2015-10-28 | 武汉策尔曼自动化设备有限公司 | Four-eccentricity butterfly valve |
| CN204961894U (en) * | 2015-09-14 | 2016-01-13 | 浙江精嘉阀门有限公司 | Eccentric ball valve of full latus rectum double containment hemisphere |
-
2016
- 2016-06-13 CN CN201610412786.7A patent/CN105840857A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346428A (en) * | 1999-02-11 | 2002-04-24 | 因戈尔夫·克莱德 | Device for ball valve |
| JP2003287148A (en) * | 2002-03-28 | 2003-10-10 | Kurimoto Ltd | Spherical valve |
| CN102207204A (en) * | 2010-03-29 | 2011-10-05 | 上海美科阀门有限公司 | High-performance eccentric ball valve |
| JP2014156912A (en) * | 2013-02-18 | 2014-08-28 | Kurimoto Ltd | Spherical valve |
| CN204459248U (en) * | 2015-01-05 | 2015-07-08 | 浙东高中压阀门有限公司 | The eccentric slurry pump control valve of C shape four |
| CN204459249U (en) * | 2015-01-14 | 2015-07-08 | 意阀（苏州）阀门有限公司 | A kind of three eccentricity ball valve |
| CN105003667A (en) * | 2015-07-07 | 2015-10-28 | 武汉策尔曼自动化设备有限公司 | Four-eccentricity butterfly valve |
| CN204961894U (en) * | 2015-09-14 | 2016-01-13 | 浙江精嘉阀门有限公司 | Eccentric ball valve of full latus rectum double containment hemisphere |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373009A (en) * | 2018-12-20 | 2019-02-22 | 武汉海王科技有限公司 | A kind of naval vessel ball valve limit switch instruction device |
| CN109373009B (en) * | 2018-12-20 | 2023-09-29 | 武汉海王科技有限公司 | Limit switch indicating device for ship ball valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103574070B (en) | A kind of stop valve | |
| CN104653791A (en) | Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve | |
| CN102734486A (en) | Valve assembly sealing device of low temperature ball valve | |
| CN201028043Y (en) | Wear-resistant metal hard sealing ball valve | |
| CN202733009U (en) | Flange two-way pressure hard sealing butterfly valve | |
| CN202674339U (en) | Butt-weld bidirectional pressing hard seal butterfly valve | |
| CN204533566U (en) | Four eccentric two-way seal butterfly valves | |
| CN208041171U (en) | Double leval jib elevated-temperature seal butterfly valve | |
| CN105840857A (en) | Rotary four-eccentricity ball valve | |
| CN206668991U (en) | A kind of soft seat butterfly valve of novel sealing structure | |
| CN202992205U (en) | Low load type cutting-off butterfly valve | |
| CN108150659A (en) | Double leval jib elevated-temperature seal butterfly valve | |
| CN203146851U (en) | Super supercritical forged-steel stop valve | |
| CN103711950A (en) | Double block and bleed pressure balance type inverted plug valve | |
| CN102943885A (en) | Bi-directional sealing elastic tri-eccentric butterfly valve | |
| CN204647338U (en) | Nuclear island Y shape adds pipe arrangement High Temperature High Pressure pressure-relief type Double-clack stop valve | |
| CN203202254U (en) | Double-eccentric and bidirectional metallic seal butterfly valve | |
| CN207131902U (en) | Upper dress formula full-bore LNG soft seal zero leakage two-way valves | |
| CN202927084U (en) | Bidirectional, elastic and tri-eccentric sealing butterfly valve | |
| CN104633142A (en) | Four-eccentricity double-way sealing butterfly valve | |
| CN204533568U (en) | Split type valve seat self-adjusting seal three eccentric butterfly valve | |
| CN206958279U (en) | High-sealing butterfly valve structure | |
| CN206093035U (en) | Unsteady ball valve of facial make -up elastic valve seat | |
| CN214222038U (en) | Butterfly valve | |
| CN210397739U (en) | Open-flow Y-shaped stop valve for photothermal power generation fused salt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160810 |
|
| WD01 | Invention patent application deemed withdrawn after publication |