CN103603964A - Online-maintainable butt-welding high-temperature high-pressure rapid cut-off steam ball valve - Google Patents
Online-maintainable butt-welding high-temperature high-pressure rapid cut-off steam ball valve Download PDFInfo
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- CN103603964A CN103603964A CN201310589257.0A CN201310589257A CN103603964A CN 103603964 A CN103603964 A CN 103603964A CN 201310589257 A CN201310589257 A CN 201310589257A CN 103603964 A CN103603964 A CN 103603964A
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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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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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
- F16K5/08—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
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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
- F16K5/08—Details
- F16K5/22—Features relating to lubrication
- F16K5/227—Features relating to lubrication for plugs with spherical surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to an online-maintainable butt-welding high-temperature high-pressure rapid cut-off steam ball valve, in particular to a special valve which can be widely applied to high-temperature-difference working conditions of a high-pressure steam turbine steam supply and steam extraction system and the like, and belongs to the field of instrument control. The online-maintainable butt-welding high-temperature high-pressure rapid cut-off steam ball valve comprises an intermediate valve body, the left side of the intermediate valve body is connected with a left valve body through a bolt, the right side of the intermediate valve body is connected with a right valve body through a bolt, the lower end of the intermediate valve body is connected with an integral bottom flange through a bolt, the upper end of the intermediate valve body is connected with an extendable upper cover through a bolt, and the upper end of the extendable upper cover is connected with a gland flange through a bolt. A valve ball is arranged at the inner center of the intermediate valve body, the upper end of the valve ball is connected with a transmission shaft, and the lower end of the valve ball is connected with the integral bottom flange. A left auxiliary supporting component is arranged between the valve ball and the left valve body, and a right seal assembly is arranged between the valve ball and the right valve body. Online maintenance of the valve can be realized easily, the valve can be rapidly turned on and off within one second, zero leakage can be achieved, and service life of the valve is prolonged.
Description
Technical field
The present invention relates to a kind of can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, can be widely used in specifically the Special valve under the high temperature difference operating modes such as the supply of high-pressure turbine steam and steam bleeding system, belong to instrument control field.
Background technique
In electricity generating device, the supply of high-pressure turbine steam and steam bleeding system are key modules.Repid cut-off valve and pressure regulator valve are two important control valves of emptying and stable regulation steam turbine pressure in system; This two deck valve, conventionally in closed condition, just need to open and use when needs voltage stabilizing and pressure release.Such as main steam temperature in: steam turbine is 540 ° of C, pressure is 9.2MPa, when pressure 9.3 or 9.4,9.5MPa etc. is when float between among a small circle, can carry out micro-adjusting discharge pressure by pressure regulator valve, guarantees the normal operation of system; But because each branch roads system exists pressure surge, when steam turbine internal pressure is increased to 9.6,9.7, even 10,11,12MPa is when above, just need to utilize repid cut-off valve to carry out emptying pressure, otherwise can cause that steam turbine operation irregularity even explodes, and causes systemic breakdown; So the use of repid cut-off valve under this operating mode just seems particularly important.
Straight-through valve is because its flow resistance is little, switching motion is rapid, negotiability is large, so above-mentioned repid cut-off valve adopts whole-through diameter ball valve to realize its function more, but this operating mode with valve except can be high temperature resistant, high pressure, also need keying in 1 second and zero level to leak and just can guarantee steam turbine normal operation, and the maintenance of taking out stitches of high pressure valve is also very difficult, how to make valve can open and close rapidly in 1 second, and reaching zero level leaks, installation and maintenance simply and easily are again problems that user and control valve industry are all paid special attention to.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thus provide a kind of ability high temperature difference, good seal performance, can open and close rapidly can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve.
According to technological scheme provided by the invention, can comprise middle valve body by on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: middle valve body passes on left bolt and connects left side valve body, middle valve body right side is bolted right side valve body, middle valve body lower end is bolted integral bottom flange, middle valve body upper end is bolted extension upper cover, extends upper cover upper end and is bolted hold-down grid; In middle valve body, central position is provided with valve ball, valve ball upper end connection for transmission axle; Described transmission shaft step is provided with thrust plane bearing, and thrust plane bearing upper end is provided with lining; Between transmission shaft and extension upper cover, be provided with stuffing box packing, stuffing box packing upper and lower end is provided with compound anti-extrusion pressure ring; Between stuffing box packing and hold-down grid, be provided with Gland, hold-down grid is by Gland press seal filler; Flange at the bottom of the connecting overall of valve ball lower end; Between valve ball and left side valve body, be provided with between left redundant supporting component valve ball and right side valve body and be provided with right black box.
Further, between middle valve body and extension upper cover, be provided with upper cover profile of tooth sealing gasket.
Further, extend upper cover side and be provided with pouring orifice.
Further, between integral bottom flange and middle valve body, be provided with end flange profile of tooth sealing gasket.
Further, between integral bottom flange and valve ball, be provided with lower lining.
Further, left redundant supporting component comprises left valve seat, and left valve seat outer ring is provided with pressure support ring, and pressure support ring rear end connects preload ring by thrust screw; Between left valve seat and pressure support ring, be provided with pretightening butterfly spring; Between pressure support ring, preload ring joint and middle valve body, be provided with location jump ring.
Further, right black box comprises right valve seat, between right valve seat side and middle valve body, is provided with axial seal filler, is provided with sealing butterfly spring between right valve seat rear end and middle valve body.
Further, between middle valve body and left side valve body, be provided with left side valve body profile of tooth sealing gasket, between middle valve body and right side valve body, be provided with right side valve body profile of tooth sealing gasket.
Further, left side valve body is provided with left redundant hanger.
Further, right side valve body is provided with right redundant hanger.
Further, described stuffing box packing upper and lower end is provided with compound anti-extrusion pressure ring.
Compared with the prior art the present invention has the following advantages:
1. valve end adopts butt welding to be connected with pipeline, and owing to being high pressure valve, butt welding Connecting format can effectively avoid valve flanges end to leak outside;
2. both sides valve body is welded with auxiliary stretching journal stirrup, and end connects when online, can pass through pipeline tension force stretching both sides valve body journal stirrup, reserves dismounting gap, realizes valve on-line maintenance;
3. adopt inner valve stem pressure self-sealing structure, spraying and the metal thrust plane bearing grinding can prevent that medium from entering stuffing box, the surface of grinding can tight seal, can make pipeline pressure become vertical force, and this structure also can prevent from wearing and tearing between valve body, valve rod and inner valve stem;
4. in, valve body left side adopts and anti-ly eases out supporting structure, both can guarantee that valve body dismantled online without interfering, and can change easily trim again;
5. both sides valve seat adopts respectively butterfly spring pretension to load and the stressed sealing configuration of butterfly spring, and the dynamic stability when high leak tightness of assurance valve ball and valve seat and high temperature can make valve at high temperature open and close rapidly;
6. stuffing box is installed compound anti-extrusion pressure ring, can effectively avoid filler under high pressure operating mode to be extruded;
7. valve body adopts high temperature Cr-Mo steel (F22) forging form, and forging valve body is noted road without dead band, can effectively avoid intergranular corrosion, has guaranteed again reliable voltage endurance capability;
8. valve ball and valve seat adopt supersonic spray coating equipment at the high Tungsten carbite of sealing surface spraying abrasion-proof or chromium carbide, to form the cementation zone of high densification, high hardness; Surface hardness reaches as high as HRC80 more than generally can reaching HRC55.Seal face materials heatproof generally can reach 500 ° of C, reaches as high as 950 ° of C; Guaranteed the functional reliability of valve under various pressure and temperature range, even if threshold switch also still can guarantee its sealing millions of times;
9. distinctive grinding equipment and technology be by spheroid and the lapping apparatus rotation of different azimuth aloft, and valve seat coupling grinds, and 100% contact is closely sealed, and spherome surface can reach high circularity and degree of finish, valve is sealed completely and reach zero level to leak;
10. transmission shaft adopts the high temperature resistant Nickel-Based Steel of GH2132, and this material has high yield strength and lasting, creep strength at 650 ° below C; Corresponding heat treatment can increase its twisting strength, prevents that axle head attachment portion from producing distortion because moment of torsion increases;
11. linings adopt 316 stainless steel solution treatment, and internal surface is through grinding, extrusion process, and degree of finish reaches 0.4, reduce friction;
12. valve shaft filler regions adopt grinding+high frequency extrusion process, HRC38, and surface roughness can reach 0.4, at utmost reduces the probability of valve leakage out of steam system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is left redundant supporting component structural representation of the present invention.
Description of reference numerals: 1-transmission shaft, 2-hold-down grid, 3-Gland, the compound anti-extrusion pressure ring of 4-, 5-stuffing box packing, 6-extends upper cover, the upper lining of 7-, 8-upper cover profile of tooth sealing gasket, 9-thrust plane bearing, 10-left side valve body profile of tooth sealing gasket, 11-left side valve body, 12-thrust screw, 13-preload ring, 14-pressure support ring, the left valve seat of 15-, 16-pretightening butterfly spring, 17-locates jump ring, lining under 18-, 19-integral bottom flange, flange profile of tooth sealing gasket at the bottom of 20-, valve body in 21-, 22-valve ball, the right valve seat of 23-, 24-sealing butterfly spring, 25-axial seal filler, 26-right redundant hanger, 27-pouring orifice, 28-right side valve body, 29-right side valve body profile of tooth sealing gasket, 30-left redundant hanger.
Embodiment
The present invention is below further described in connection with the embodiment in accompanying drawing:
As shown in Figure 1 and 2, the present invention mainly comprises middle valve body 21, middle valve body 21 passes on left bolt and connects left side valve body 11, middle valve body 21 right sides are bolted right side valve body 28, middle valve body 21 lower ends are bolted integral bottom flange 19, middle valve body 21 upper ends are bolted extends upper cover 6, extends upper cover 6 upper ends and is bolted hold-down grid 2.Between described middle valve body 21 and extension upper cover 6, be provided with upper cover profile of tooth sealing gasket 8.
The interior central position of middle valve body 21 is provided with valve ball 22, valve ball 22 upper end connection for transmission axles 1.Described transmission shaft 1 step is provided with thrust plane bearing 9, and thrust plane bearing 9 upper ends are provided with lining 7.Between transmission shaft 1 and extension upper cover 6, be provided with stuffing box packing 5, stuffing box packing 5 upper and lower end are provided with compound anti-extrusion pressure ring 4.Between stuffing box packing 5 and hold-down grid 2, be provided with Gland 3, hold-down grid 2 is by Gland 3 press seal fillers 5.
Described extension upper cover 6 sides are provided with pouring orifice 27.
Between valve ball 22 and left side valve body 11, be provided with left redundant supporting component, between valve ball 22 and right side valve body 28, be provided with right black box.
Described left redundant supporting component comprises left valve seat 15, and left valve seat 15 outer rings are provided with pressure support ring 14, and pressure support ring 14 rear ends connect preload ring 13 by thrust screw 12.Between left valve seat 15 and pressure support ring 14, be provided with pretightening butterfly spring 16.Between described pressure support ring 14, preload ring 13 joints and middle valve body 21, be provided with location jump ring 17, location jump ring 17 makes pressure support ring 14 not produce axial displacement.
Described right black box comprises right valve seat 23, between right valve seat 23 sides and middle valve body 21, is provided with axial seal filler 25, is provided with sealing butterfly spring 24 between right valve seat 23 rear ends and middle valve body 21.
Between described middle valve body 21 and left side valve body 11, be provided with left side valve body profile of tooth sealing gasket 10.
Between described middle valve body 21 and right side valve body 28, be provided with right side valve body profile of tooth sealing gasket 29.
Described left side valve body 11 is provided with left redundant hanger 30, and right side valve body 28 is provided with right redundant hanger 26, can pass through the light dismounting valve body of pipeline tension force.
Working principle of the present invention is as follows: when valve open is worked, aid in line pressure, and given between left valve seat and valve ball lasting sealing thrust is provided by pretightening butterfly spring, the sealing butterfly spring compensation reaction force of opposite side, fits tightly right valve seat and valve ball.Valve ball and valve seat adopt supersonic spray coating equipment at the high Tungsten carbite of sealing surface spraying abrasion-proof or chromium carbide, to form the cementation zone of high densification, high hardness, coordinate grinding equipment that left valve seat, right valve seat are mated to grinding with valve ball, 100% contact is closely sealed, realizes zero level and leaks one-way sealing; Guarantee that valve closes completely, when the switching position, can separate with steam flow.When valve needs on-line maintenance, first the connecting screw rod of both sides valve body is taken apart, utilize auxiliary hanger that side valve body is stretched by duct orientation, until reserve the withdrawal space, the whole taking-up of intermediate portion part can be keeped in repair.Location jump ring energy fixation pressure support ring, can make pressure support ring not be subject to the reverse elastic force of pretightening butterfly spring to produce displacement, and by the fastening preload ring of thrust screw and pressure support ring, the part elastic compensating while having avoided valve to dismantle is online interfered.Extend the double-deck filler group design of employing in upper cover, in the middle of filler, increase filler spacer, and cover design pouring orifice on extending, by pouring orifice charging-up lubricant oil fat, transmission shaft and filler group are lubricated, can extend filler working life, reduce the output torque requirement of Liao Dui actuator, increase the degree of regulation of valve.Transmission shaft adopts the high temperature resistant Nickel-Based Steel of GH2132, and this material has high yield strength and lasting, creep strength at 650 ° below C; Corresponding heat treatment can increase its twisting strength, prevents that axle head attachment portion from producing distortion because moment of torsion increases.Lining adopts 316 stainless steel solution treatment, and internal surface is through grinding, extrusion process, and degree of finish reaches 0.4, reduces friction.Filler region adopts grinding+high frequency extrusion process, HRC38, and surface roughness can reach 0.4, at utmost reduces the probability of valve leakage out of steam system.
Claims (8)
- One kind can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, comprise middle valve body (21), it is characterized in that: middle valve body (21) passes on left bolt and connects left side valve body (11), middle valve body (21) right side is bolted right side valve body (28), middle valve body (21) lower end is bolted integral bottom flange (19), middle valve body (21) upper end is bolted extends upper cover (6), extends upper cover (6) upper end and is bolted hold-down grid (2); The interior central position of middle valve body (21) is provided with valve ball (22), valve ball (22) upper end connection for transmission axle (1); Described transmission shaft (1) step is provided with thrust plane bearing (9), and thrust plane bearing (9) upper end is provided with lining (7); Between transmission shaft (1) and extension upper cover (6), be provided with stuffing box packing (5), stuffing box packing (5) upper and lower end is provided with compound anti-extrusion pressure ring (4); Between stuffing box packing (5) and hold-down grid (2), be provided with Gland (3), hold-down grid (2) is by Gland (3) press seal filler (5); Flange (19) at the bottom of the connecting overall of valve ball (22) lower end; Between valve ball (22) and left side valve body (11), be provided with left redundant supporting component, between valve ball (22) and right side valve body (28), be provided with right black box.
- 2. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described extension upper cover (6) side is provided with pouring orifice (27).
- 3. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: between described integral bottom flange (19) and valve ball (22), be provided with lower lining (18).
- 4. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described left redundant supporting component comprises left valve seat (15), left valve seat (15) outer ring is provided with pressure support ring (14), and pressure support ring (14) rear end connects preload ring (13) by thrust screw (12); Between left valve seat (15) and pressure support ring (14), be provided with pretightening butterfly spring (16); Between pressure support ring (14), preload ring (13) joint and middle valve body (21), be provided with location jump ring (17).
- 5. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described right black box comprises right valve seat (23), between right valve seat (23) side and middle valve body (21), be provided with axial seal filler (25), between right valve seat (23) rear end and middle valve body (21), be provided with sealing butterfly spring (24).
- 6. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described left side valve body (11) is provided with left redundant hanger (30).
- 7. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described right side valve body (28) is provided with right redundant hanger (26).
- 8. as claimed in claim 1 can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve, it is characterized in that: described stuffing box packing (5) upper and lower end is provided with compound anti-extrusion pressure ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589257.0A CN103603964B (en) | 2013-11-20 | 2013-11-20 | Can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589257.0A CN103603964B (en) | 2013-11-20 | 2013-11-20 | Can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN103603964A true CN103603964A (en) | 2014-02-26 |
| CN103603964B CN103603964B (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310589257.0A Active CN103603964B (en) | 2013-11-20 | 2013-11-20 | Can on-line maintenance butt joint type High Temperature High Pressure fast shut-off steam ball valve |
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| CN (1) | CN103603964B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653807A (en) * | 2015-02-10 | 2015-05-27 | 无锡智能自控工程股份有限公司 | Residual oil separating ball valve for delaying coking |
| CN106523040A (en) * | 2017-01-10 | 2017-03-22 | 上海电气电站设备有限公司 | Connecting structure for steam cylinder and steam inlet valve of steam turbine |
| WO2017069925A1 (en) * | 2015-10-22 | 2017-04-27 | Dresser-Rand Company | Ball trip valve for a steam turbine |
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| CN2577062Y (en) * | 2002-07-22 | 2003-10-01 | 孟永康 | Frictionless high-temperature high-pressure ball valve |
| CN201250918Y (en) * | 2007-09-17 | 2009-06-03 | 温州球豹阀门有限公司 | Dual-elastic sliding seal stiff-seal high-temperature high-pressure ball valve |
| CN101737520A (en) * | 2009-12-25 | 2010-06-16 | 昆山维萨阀门有限公司 | Ultra-low temperature ball valve |
| CN201934702U (en) * | 2010-12-23 | 2011-08-17 | 天津精通控制仪表技术有限公司 | Fixed-ball metal sealing ball valve |
| CN202402681U (en) * | 2011-08-13 | 2012-08-29 | 余金贤 | High temperature and high pressure ball valve |
| CN203686213U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Butt welding type high-temperature and high-pressure rapid cut-off steam ball valve supporting online maintenance |
-
2013
- 2013-11-20 CN CN201310589257.0A patent/CN103603964B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2577062Y (en) * | 2002-07-22 | 2003-10-01 | 孟永康 | Frictionless high-temperature high-pressure ball valve |
| CN201250918Y (en) * | 2007-09-17 | 2009-06-03 | 温州球豹阀门有限公司 | Dual-elastic sliding seal stiff-seal high-temperature high-pressure ball valve |
| CN101737520A (en) * | 2009-12-25 | 2010-06-16 | 昆山维萨阀门有限公司 | Ultra-low temperature ball valve |
| CN201934702U (en) * | 2010-12-23 | 2011-08-17 | 天津精通控制仪表技术有限公司 | Fixed-ball metal sealing ball valve |
| CN202402681U (en) * | 2011-08-13 | 2012-08-29 | 余金贤 | High temperature and high pressure ball valve |
| CN203686213U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Butt welding type high-temperature and high-pressure rapid cut-off steam ball valve supporting online maintenance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653807A (en) * | 2015-02-10 | 2015-05-27 | 无锡智能自控工程股份有限公司 | Residual oil separating ball valve for delaying coking |
| WO2017069925A1 (en) * | 2015-10-22 | 2017-04-27 | Dresser-Rand Company | Ball trip valve for a steam turbine |
| CN106523040A (en) * | 2017-01-10 | 2017-03-22 | 上海电气电站设备有限公司 | Connecting structure for steam cylinder and steam inlet valve of steam turbine |
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| Publication number | Publication date |
|---|---|
| CN103603964B (en) | 2015-12-30 |
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