CN104405889A - Improved throttling cut-off emptying valve - Google Patents
Improved throttling cut-off emptying valve Download PDFInfo
- Publication number
- CN104405889A CN104405889A CN201410656700.6A CN201410656700A CN104405889A CN 104405889 A CN104405889 A CN 104405889A CN 201410656700 A CN201410656700 A CN 201410656700A CN 104405889 A CN104405889 A CN 104405889A
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- Prior art keywords
- valve
- flap
- modified model
- valve seat
- conical surface
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 239000002893 slag Substances 0.000 claims description 11
- 230000003044 adaptive effect Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K1/02—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 with screw-spindle
- F16K1/04—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 with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K1/46—Attachment of sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses an improved throttling cut-off emptying valve and belongs to the field of valves. The improved throttling cut-off emptying valve comprises a valve body, a valve rod, a bracket, a valve cover, a valve flap, a cylindrical valve sleeve, a valve seat, a pressing ring and a soft sealing ring, wherein the valve flap is connected to the valve rod and is arranged in the cylindrical valve sleeve; the pressing ring is connected to the valve flap; the soft sealing ring is arranged between the pressing ring and the valve flap; the valve seat is arranged in a valve body seat hole matched with the valve seat; the sealing surfaces of the valve seat, the seat flap and the soft sealing ring are tapered respectively and are matched with one another. According to the improved throttling cut-off emptying valve, the reasonability of a product structure is effectively improved, and the sealing stability of a product is perfected.
Description
Technical field
The present invention relates to valve field, specifically a kind of modified model choke stop evacuation valve.
Background technique
Choke stop evacuation valve is a kind of double seal valve, plays in the conveyance conduit being mainly used in oil, rock gas, coal gas, blau gas etc., uses usually used as regulable control or cut-out.Such valve is a kind of novel throttling, cut-off, emptying product, has multistage throttle effect, the features such as restriction effect is obvious, sealing is reliable, convenient operating maintenance.
At existing choke stop evacuation valve in the throttling of valve, cut-out, equalizing orifice arranges to alleviate in operation torsion, combination seal etc. all very much progress.But in actual conditions application, still there are distinct issues: be mainly reflected in the valve good operation period not long, bad working environments occurs that quality problems are many.Particularly when High Pressure Difference, operating mode medium unholiness (such as, dust, body refuse etc.), general valve seal easily damages and occurs that the situation of interior leakage is more, and even serious jam appears in some valve.Tracing it to its cause, it is not exclusively reasonable to be mainly structural design: although valve design function all has configuration, and in fact its Functional Design structure can not extensively be suitable for, and its structure exists wretched insufficiency in self function and protecting.
As Chinese patent CN03201641.7(notification number CN2597768Y) disclose a kind of guiding washing-resisting throttle stop emptying valve, mention dress on Sealing and have the flow guide sleeve of bar string holes or aperture, but find in practice process, this device noise is large and easily because pressure reduction causes vibration, and refluence effect is bad.And for example Chinese patent CN200820169018.4 (notification number CN201314386Y) discloses a kind of choke stop evacuation valve, valve seat carries out chamfered, it is made to form the conical surface, and accelerate velocity of medium by the conical surface of valve seat, MEDIA FLOW is changed to direction with oblique angle, thus generation eddy current, increase valve seat end face medium radial force.But in practice, only form the process of the conical surface in valve seat place chamfering, soft seal can be made instantaneously to be torn by high pressure at valve switch, working life shortens, and can only be applicable to low pressure seal, and middle pressure, high pressure sealing reliability are low.
The rationality of further improvement product structure, improving product sealing stability is the key improved.
Summary of the invention
The present invention aims to provide a kind of modified model choke stop evacuation valve, to solve the problem.
For achieving the above object, technological scheme of the present invention is as follows:
Modified model choke stop evacuation valve, comprises valve body, valve rod, support, valve gap, it is characterized in that: also comprise flap, tubular valve pocket, valve seat, pressure ring and soft seal circle, flap is connected to valve rod, is arranged in tubular valve pocket; Described pressure ring is connected on flap, is provided with soft seal circle between pressure ring and flap; Described valve seat is arranged in valve body bore adaptive with it, and the sealing surface of valve seat, flap and soft seal circle is taper, and mutually adaptive.
Further, described valve seat and valve clack sealing surface built-up welding or be coated with wear-resisting, anticorrosive hard alloy layer or Tungsten carbite hardstanding, soft seal circle is explosion-proof triangle fluorine rubber ring.
Further, described valve seat conical seal (contact) face is the step conical surface, is also provided with O-ring seals between valve seat and valve body.
Further, described pressure ring is also provided with the conical surface, the conical surface of pressure ring is divided into two sections, is also provided with boss between two sections of conical surfaces, and the pressure ring conical surface and the flap conical surface form step conic, adaptive with the step conical surface on valve seat.
Further, described flap flap gland is relative with valve rod fixing, is provided with thrust bearing between flap and valve rod, also has the equalizing orifice connecting valve body upper cavity and lower chamber in flap.
Further, described flap is flexibly connected with tubular valve pocket, and flap contacts circumferential surface and has at least two and place the annular groove sealing O shape and enclose with tubular valve pocket, be provided with storage slag chute between two annular grooves.
Further, under described flap, excircle is provided with and scrapes slag cutting edge, scrapes slag cutting edge laminating tubular valve pocket.
Further, described tubular valve pocket is arranged in valve body, and lower circumference is provided with at least one group of throttling groove different in size.
Further, the bottom of described throttling groove on the same axis, each throttling groove be periodic symmetry distribution.
Further, described tubular valve pocket and valve body contact face are provided with the annular groove placed and seal O shape and enclose.
Beneficial effect of the present invention is:
One, conical seal (contact) face is beneficial to purging, easily removes the foul on sealing surface.Soft, the hard sealing surface of flap and valve seat is conical seal (contact) face, is unfavorable for that foreign material are piled up or deposition, and is very easy to purge totally, prevent sealing surface extruded by hard object or scratch.
Two, the softer, elastic seal ring on flap and valve base sealing taper-face contact, soft seal first realizes sealing, and continuation is closed, until the hard sealing surface of taper on flap is against on the hard sealing surface of valve seat taper completely, now realize hard sealing, and closedown puts in place.Form real soft, hard double sealing structure, this not only can ensure valve base sealing zero leakage, and can effectively lifting valve base sealing reliability.
three,adopt pressure ring to coordinate with valve seat thus form slow nip structural design.Valve opening moment, hard, soft sealing face that flap, soft seal circle and valve seat are formed successively are thrown off, and in this process, the boss of pressure ring forms slow nip with the segment length that coordinates of the interior step of valve seat.Slow nip structural design, prevent valve open/close moment soft seal from being torn by high pressure, prevent high pressure valve from opening and closing moment simultaneously, easily the problem in damage soft seal face, ensure that this structure is applicable to the reliability of high, medium and low voltage simultaneously.
Four, valve seat conical seal (contact) face is designed to the step conical surface, and pressure ring is also provided with the conical surface, and the flap conical surface and the pressure ring conical surface form step conic, adaptive with the step conical surface on valve seat respectively.Stair-stepping sealing surface, when flap is opened, changes the flow direction flowing out medium, weakens the impact force of medium to soft seal circle, meanwhile, along with the increasing of opening degree, MEDIA FLOW constantly reduces to angle, valve pressure reduction also reduces thereupon, progressively weakens the impact force of MEDIA FLOW.Soft, the hard sealing surface of available protecting in whole process, improves sealing surface working life.
Five, tubular valve pocket lower circumference is laid with throttling groove different in size, each throttling groove periodic symmetry distribution.While the effective throttling of length throttling groove, ensure that in valve opening process, the flow shape that is in line increases progressively, and seamlessly transits to decrease differential pressure vibration when structural design medium flows out simultaneously, play the effect of noise-reducing, and reduce manufacture cost without the need to deliberately setting up noise-reducing part.
Six, the design of thrust bearing reduces the frictional force of valve rod and flap, and when can prevent from closing, flap rotation, namely alleviates moment, decreases the damage that revolution stiction that sealing surface bears causes.
Be provided with storage slag chute between two O-ring seals seven, on flap cylindrical, sliding seal ring can be put by Protective valve, under setting up flap, scrape slag cutting edge simultaneously, remove medium foul and be attached to bottom, valve pocket chamber, when can prevent flap from closing, produce the situation of jam downwards.
Accompanying drawing explanation
Fig. 1 is modified model choke stop evacuation valve structural representation provided by the invention.
Fig. 2 is the cooperating structure enlarged diagram of tubular valve pocket provided by the invention, flap, valve seat and pressure ring.
Fig. 3 is the partial enlarged drawing of A place using state one in Fig. 2.
Fig. 4 is the partial enlarged drawing of A place using state two in Fig. 2.
Fig. 5 is the partial enlarged drawing of A place using state three in Fig. 2.
Fig. 6 is tubular valve pocket effect schematic diagram provided by the invention.
Fig. 7 is that the throttling groove of tubular valve pocket lower circumference provided by the invention launches schematic diagram.
Mark in figure: 1 being valve body, 2 being O-ring seals, 3 be valve seat, 7 be screw, 8 be pressure ring, 9 be soft seal circle, 10 be flap, 11 be thrust bearing, 12 be tubular valve pocket, 13 be flap gland, 14 be valve rod, 17 be valve gap, 21 be support, 29 be valve pocket annular groove, 30 be flap annular groove, 32 be the pressure ring conical surface, 33 be the flap conical surface, 34 be boss, 35 be the valve seat step conical surface, 37 being throttling groove for scraping slag cutting edge, 38,40 for equalizing orifice.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described.
As shown in Figures 1 to 7, modified model choke stop evacuation valve, comprises valve body 1, valve rod 14, support 21, valve gap 17, it is characterized in that: also comprise flap 10, tubular valve pocket 12, valve seat 3, pressure ring 8 and soft seal circle 9, flap 10 is connected to valve rod 14, is arranged in tubular valve pocket 12; Described pressure ring 8 screw 7 is connected on flap 10, is provided with soft seal circle 9 between pressure ring 8 and flap 10; Described valve seat 3 is arranged in valve body 1 bore adaptive with it, and the sealing surface of valve seat 3, flap 10 and soft seal circle 9 is taper, and mutually adaptive.Described valve seat 3 and flap 10 sealing surface weld deposit or be coated with wear-resisting, anticorrosive hard alloy layer or Tungsten carbite hardstanding, soft seal circle 9 is explosion-proof triangle fluorine rubber ring.Described valve seat 3 conical seal (contact) face is the step conical surface, is also provided with O-ring seals 2 between valve seat 3 and valve body 1.Described flap 10 is relative with valve rod 14 fixing with flap gland 13, is provided with thrust bearing 11 between flap 10 and valve rod 14, also has the equalizing orifice 40 connecting valve body 1 upper cavity and lower chamber in flap 10.Described flap 10 is flexibly connected with tubular valve pocket 12, and flap 10 contacts circumferential surface and has at least two and place to seal between annular groove 30, two annular grooves 30 that O shape encloses and be provided with storage slag chute with tubular valve pocket 12.Described flap 10 times excircles are provided with scrapes slag cutting edge 37.Described pressure ring 8 is also provided with the conical surface, and the conical surface of pressure ring 8 is divided into two sections, is also provided with boss between two sections of conical surfaces, and pressure ring 8 conical surface forms step conic with, flap 10 conical surface, adaptive with the step conical surface on valve seat 3.Described tubular valve pocket 12 is arranged in valve body 1, and lower circumference is provided with at least one group of throttling groove 38 different in size.On the same axis, each throttling groove 38 periodic symmetry distributes in the bottom of described throttling groove 38.Described tubular valve pocket 12 is provided with valve body 1 surface of contact the annular groove 29 placed and seal O shape and enclose.
In use, when valve closes, as shown in Figure 3, soft seal circle 9 first realizes sealing, and continuation is closed, until the hard sealing surface of taper on flap 10 is against on the hard sealing surface of valve seat 3 taper completely, now realize hard sealing, and closedown puts in place.Now closed between the flap conical surface 33, the valve seat step conical surface 35, the pressure ring conical surface 32 and triangle soft seal circle 9, form real soft, hard double sealing structure, this not only can ensure valve base sealing zero leakage, and can the effective reliability that seals of lifting valve base.
When opening few, as shown in Figure 4, pull handwheel band ovable valve stem 14 to move up, valve rod 14 drives flap 10 to move up in tubular valve pocket 12, hard, soft sealing face that flap 10, soft seal circle 9 and valve seat 3 are formed successively are thrown off, and in this process, the boss 34 of pressure ring 8 forms slow nip with the segment length that coordinates of the interior step of valve seat 3.Slow nip structural design, prevent valve open/close moment soft seal from being torn by high pressure, prevent high pressure valve from opening and closing moment simultaneously, easily the problem in damage soft seal face, ensure that this structure is applicable to the reliability of high, medium and low voltage simultaneously.Depart from valve seat 3 after step surface at the boss 34 of pressure ring 8, medium goes into circulation, and changes to flow to enter the sealing channel opened along the pressure ring conical surface 32, then enters in valve channel along the valve seat step conical surface 35.Along with unlatching increases, as shown in Figure 5, the step conic that the pressure ring conical surface 32 and the flap conical surface 33 are formed increases with the valve seat step conical surface 35 angle gradually.Change while the effect flowed to reduces gradually, reduce the pressure reduction in valve gradually, also play a role with the throttling groove 38 on now tubular valve pocket 12, progressively slow down the scouring force of MEDIA FLOW.Effectively prevent directly washing away sealing surface, protect sealing surface, the working life of sealing surface is greatly increased.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a modified model choke stop evacuation valve, comprise valve body (1), valve rod (14), support (21), valve gap (17), it is characterized in that: also comprise flap (10), tubular valve pocket (12), valve seat (3), pressure ring (8) and soft seal circle (9), flap (10) is connected to valve rod (14), is arranged in tubular valve pocket (12); Described pressure ring (8) is connected on flap (10), is provided with soft seal circle (9) between pressure ring (8) and flap (10); Described valve seat (3) is arranged in valve body (1) bore adaptive with it, and the sealing surface of valve seat (3), flap (10) and soft seal circle (9) is taper, and mutually adaptive.
2. modified model choke stop evacuation valve according to claim 1, it is characterized in that: described valve seat (3) and flap (10) sealing surface weld deposit or be coated with wear-resisting, anticorrosive hard alloy layer or Tungsten carbite hardstanding, soft seal circle (9) is explosion-proof triangle fluorine rubber ring.
3. modified model choke stop evacuation valve according to claim 1, is characterized in that: described valve seat (3) conical seal (contact) face is the step conical surface, is also provided with O-ring seals (2) between valve seat (3) and valve body (1).
4. modified model choke stop evacuation valve according to claim 1, it is characterized in that: (8) are also provided with the conical surface to described pressure ring, the conical surface of pressure ring (8) is divided into two sections, also boss is provided with between two sections of conical surfaces, pressure ring (8) conical surface and flap (10) conical surface form step conic, adaptive with the step conical surface on valve seat (3).
5. modified model choke stop evacuation valve according to claim 1, it is characterized in that: described flap (10) flap gland (13) is relative fixing with valve rod (14), be provided with thrust bearing (11) between flap (10) and valve rod (14), in flap (10), also have the equalizing orifice (40) connecting valve body (1) upper cavity and lower chamber.
6. modified model choke stop evacuation valve according to claim 1, it is characterized in that: described flap (10) is flexibly connected with tubular valve pocket (12), flap (10) contacts circumferential surface and has at least two and place the annular groove (30) sealing O shape and enclose with tubular valve pocket (12), be provided with storage slag chute between two annular grooves (30).
7. modified model choke stop evacuation valve according to claim 1, is characterized in that: under described flap (10), excircle is provided with and scrapes slag cutting edge (37), scrapes slag cutting edge (37) laminating tubular valve pocket (12).
8. modified model choke stop evacuation valve according to claim 1, is characterized in that: described tubular valve pocket (12) is arranged in valve body (1), and lower circumference is provided with at least one group of throttling groove different in size (38).
9. modified model choke stop evacuation valve according to claim 8, is characterized in that: on the same axis, each throttling groove (38) distributes in periodic symmetry in the bottom of described throttling groove (38).
10. modified model choke stop evacuation valve according to claim 1, is characterized in that: described tubular valve pocket (12) and valve body (1) surface of contact are provided with the annular groove (29) placed and seal O shape and enclose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410656700.6A CN104405889A (en) | 2014-11-18 | 2014-11-18 | Improved throttling cut-off emptying valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410656700.6A CN104405889A (en) | 2014-11-18 | 2014-11-18 | Improved throttling cut-off emptying valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405889A true CN104405889A (en) | 2015-03-11 |
Family
ID=52643540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410656700.6A Pending CN104405889A (en) | 2014-11-18 | 2014-11-18 | Improved throttling cut-off emptying valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405889A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179717A (en) * | 2015-10-26 | 2015-12-23 | 四川长仪油气集输设备股份有限公司 | Anti-scouring and anti-corrosion high-pressure throttling valve and producing method of combined valve element |
| CN105909808A (en) * | 2016-06-02 | 2016-08-31 | 苏州丹顿机电有限公司 | Valve |
| CN107218405A (en) * | 2017-06-02 | 2017-09-29 | 北京航天石化技术装备工程有限公司 | A kind of surge reliever sealing structure |
| CN108825795A (en) * | 2018-09-10 | 2018-11-16 | 陕西博菲特流体控制装备制造有限公司 | Triangular form double containment cage valve |
| CN108916431A (en) * | 2018-09-19 | 2018-11-30 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Lift check valve for oil field fuel transfer system |
| CN109958480A (en) * | 2017-12-22 | 2019-07-02 | 中核核电运行管理有限公司 | Improved method is leaked in domestic 650MW nuclear steam turbine homophony valve |
| CN113757399A (en) * | 2021-09-10 | 2021-12-07 | 特瑞斯能源装备股份有限公司 | A valve sealing structure |
| CN119373881A (en) * | 2024-12-31 | 2025-01-28 | 永隆阀门有限公司 | A soft and hard double sealing plug type stop valve |
| EP4450855A4 (en) * | 2021-12-18 | 2025-04-02 | Zhejiang Dunan Artificial Env Co Ltd | SHUT-OFF VALVE AND COOLING SYSTEM |
-
2014
- 2014-11-18 CN CN201410656700.6A patent/CN104405889A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179717A (en) * | 2015-10-26 | 2015-12-23 | 四川长仪油气集输设备股份有限公司 | Anti-scouring and anti-corrosion high-pressure throttling valve and producing method of combined valve element |
| CN105909808A (en) * | 2016-06-02 | 2016-08-31 | 苏州丹顿机电有限公司 | Valve |
| CN107218405A (en) * | 2017-06-02 | 2017-09-29 | 北京航天石化技术装备工程有限公司 | A kind of surge reliever sealing structure |
| CN109958480A (en) * | 2017-12-22 | 2019-07-02 | 中核核电运行管理有限公司 | Improved method is leaked in domestic 650MW nuclear steam turbine homophony valve |
| CN109958480B (en) * | 2017-12-22 | 2021-09-17 | 中核核电运行管理有限公司 | Domestic 650MW nuclear power turbine main regulating valve internal leakage improvement method |
| CN108825795A (en) * | 2018-09-10 | 2018-11-16 | 陕西博菲特流体控制装备制造有限公司 | Triangular form double containment cage valve |
| CN108825795B (en) * | 2018-09-10 | 2024-02-23 | 陕西博菲特流体控制装备制造有限公司 | Triangle double-seal cage valve |
| CN108916431A (en) * | 2018-09-19 | 2018-11-30 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Lift check valve for oil field fuel transfer system |
| CN113757399A (en) * | 2021-09-10 | 2021-12-07 | 特瑞斯能源装备股份有限公司 | A valve sealing structure |
| EP4450855A4 (en) * | 2021-12-18 | 2025-04-02 | Zhejiang Dunan Artificial Env Co Ltd | SHUT-OFF VALVE AND COOLING SYSTEM |
| CN119373881A (en) * | 2024-12-31 | 2025-01-28 | 永隆阀门有限公司 | A soft and hard double sealing plug type stop valve |
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