CN203442156U - Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) - Google Patents
Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) Download PDFInfo
- Publication number
- CN203442156U CN203442156U CN201320573527.4U CN201320573527U CN203442156U CN 203442156 U CN203442156 U CN 203442156U CN 201320573527 U CN201320573527 U CN 201320573527U CN 203442156 U CN203442156 U CN 203442156U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- keying portion
- valve rod
- high pressure
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) and belongs to the technical field of valves. The large-caliber high pressure balanced type cut-off valve for the LNG comprises a valve rod and a tubular valve body, wherein the two ends of the valve body are sealed to form a valve cavity, the valve cavity is divided into an upper liquid flowing-past cavity and a lower liquid flowing-past cavity, two liquid flowing-past holes are formed in the side wall of the valve body and are respectively communicated with the two liquid flowing-past cavities; the lower part of the valve rod is arranged in the valve body, the inner walls of the two ends of the valve rod in the valve body are sealed, an upper opening and closing part, a middle opening and closing part and a lower opening and closing part which are spaced from each other are arranged at the lower part of the valve rod, a main sealing gasket is arranged on the middle opening and closing part and can separate the two liquid flowing-past cavities, the lower surface of the upper opening and closing part and the upper surface of the middle opening and closing part are arranged in the upper liquid flowing-past cavity, and the upper surfaces of the middle opening and closing part and the lower opening and closing part are arranged in the lower liquid flowing-past cavity. The large-caliber high pressure balanced type cut-off valve for the LNG has the advantages that the valve body and the valve rod adopt a balanced combined structure, an acting force of medium pressure to the valve rod can be reduced, and the large-caliber high pressure balanced type cut-off valve can be opened and closed only by virtue of a small driving force even under high pressure.
Description
Technical field
The utility model relates to a kind of cut-off valve, especially a kind of LNG heavy caliber high pressure balance type cutting valve.
Background technique
Under the operating mode of low temperature, high pressure, in LNG and CNG conveying, the conventional common inside nominal diameter of cut-off valve is very little, because do larger latus rectum, need very large driving force, can only could realize by increasing the specification of final controlling element, its manufacture cost and volume can will increase greatly.
Cause the main cause of shortcoming to be determined by valve body structure.Under high pressure, existing valve body structure can make valve rod be subject to very large active force, along with the increase of inside nominal diameter, need to open or close the increase that the required driving force of valve also can be thereupon.
Model utility content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, a kind of LNG heavy caliber high pressure balance type cutting valve is provided, valve body and valve rod have adopted a kind of balanced type composite structure, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve; Low temperature resistant, operating temperature can reach-196 ℃; High pressure resistant, working pressure can reach 25MPa; Seal ring there will not be the situation that hardening was lost efficacy at low temperatures, has guaranteed the validity of sealing and the Security of valve.
The technical solution adopted in the utility model is as follows:
LNG heavy caliber high pressure balance type cutting valve of the present utility model, comprise valve rod and tubular valve body, the sealed formation valve pocket in two ends of described valve body, described valve pocket is divided into upper and lower sap cavity excessively, is provided with two mistake liquid mouths and is communicated with two mistake sap cavities respectively on the sidewall of described valve body; The bottom of described valve rod is arranged in valve body and at the two ends of valve body inner wall sealing, the bottom of described valve rod is provided with the upper, middle and lower keying portion of space, wherein in middle keying portion, being provided with primary seal pad can cross sap cavities by two and separate, the upper surface of the lower surface of described upper keying portion and middle keying portion was arranged in sap cavity, and the upper surface of the upper surface of described middle keying portion and lower keying portion was arranged in sap cavity.
Owing to having adopted said structure, the sealed formation valve pocket in two ends of valve body, it is the active chamber that liquid passes through, the top and the bottom of described valve pocket are two and cross sap cavity, be respectively sap cavity and descended sap cavity, upper sap cavity is excessively admission chamber, therefore on the sidewall of valve body, be connected with liquid entering hole, and descended sap cavity for going out sap cavity, therefore on the sidewall of valve body, be connected with liquid outlet, above cross sap cavity and descended between sap cavity to be interconnected, valve rod extend in valve body and cooperatively interacts, wherein on the inwall at valve body two ends, form motive sealing with valve rod, valve rod can be moved with respect to valve body, can also there is good sealing effect, on the bottom of valve rod (being positioned at the part of valve body), be provided with the upper of space, in, lower keying portion, these three keying portions lay respectively at the top of valve body, middle part and bottom, and be provided with primary seal pad in middle keying portion, this primary seal pad can seal two communicating passage of crossing between sap cavity, thereby can cross sap cavity by two separates, the switch that can be used for whole cut-off valve is controlled, and upper keying portion and lower keying portion form motive sealing at the upper and lower of valve body inwall respectively, particularly, the upper surface of the lower surface of upper keying portion and middle keying portion was arranged in sap cavity, highly pressurised liquid is acted on open and close the power (F1) on subordinate surface and acts on the power (F2) of middle keying portion upper surface quite, opposite direction due to F1 and F2, valve rod is cancelled substantially at the upper power F1 being subject to and the F2 crossing in sap cavity, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve, in like manner, the upper surface of the upper surface of described middle keying portion and lower keying portion was arranged in sap cavity, due to the LNG passing through in whole cut-off valve or CNG, generally from crossing sap cavity to descending in sap cavity, lower mistake in sap cavity often exists hydraulic pressure equally, therefore in descending sap cavity, liquid effects in the power (F3) on middle keying subordinate surface and the power (F4) that acts on lower keying portion upper surface quite, opposite direction due to F3 and F4, the power F3 that be subject to and the F4 of valve rod in descending sap cavity is cancelled substantially, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve.LNG heavy caliber high pressure balance type cutting valve of the present utility model, the balanced type composite structure of reaching respectively in above crossing sap cavity, descending sap cavity by wherein valve body and valve rod, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve; In addition, this cut-off valve is mainly used in the control of LNG and CNG conveying, and therefore low temperature resistant, operating temperature can reach-196 ℃; High pressure resistant, working pressure can reach 25MPa; Seal ring there will not be the situation that hardening was lost efficacy at low temperatures, has guaranteed the validity of sealing and the Security of valve.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, described upper keying portion, middle keying portion and lower keying portion are circular outer male structure in the bottom of described valve rod, make the bottom of valve rod form " king " character form structure, between described upper keying portion's outer wall and valve interior wall, form respectively motive sealing between lower keying portion's outer wall and valve interior wall.
Owing to having adopted said structure, upper, middle and lower keying portion is the rounded convex structure on valve rod, make valve rod in upper keying portion, part between middle keying portion is the structure of indent, and the structure of this part indent was just arranged in sap cavity, thereby increased, went up liquid storage volume in sap cavity, thereby increased liquid (particularly LNG and CNG) in the upper power acting in sap cavity in keying portion and middle keying portion of crossing, thereby cross in sap cavity upper, highly pressurised liquid acts on the power (F2) that opens and closes the power (F1) on subordinate surface and act on middle keying portion upper surface quite, opposite direction due to F1 and F2, valve rod is cancelled substantially at the upper power F1 being subject to and the F2 crossing in sap cavity, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve, in like manner, the part of valve rod between middle keying portion and lower keying portion is the structure of indent, this part indent decoupling zero thigh was just arranged in sap cavity, thereby increased, descended liquid storage volume in sap cavity, thereby increased liquid (particularly LNG and CNG) and in descending sap cavity, acted on the power in middle keying portion and lower keying portion, liquid effects in descending sap cavity in the power (F3) on middle keying subordinate surface and the power (F4) that acts on lower keying portion upper surface quite, opposite direction due to F3 and F4, the power F3 that be subject to and the F4 of valve rod in descending sap cavity is cancelled substantially, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, described primary seal pad is located on the lower surface of middle keying portion, and described middle keying portion is affixed on the upper and lower passage of crossing between sap cavity and is formed sealing by primary seal pad.
Owing to having adopted said structure, can be by controlling valve rod, primary seal pad on the bottom surface of keying portion in valve rod is affixed on the inwall of valve body, and this primary seal pad is affixed on the upper and lower passage of crossing between sap cavity especially, thereby makes this valve rod can control the switching of whole cut-off valve.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, the two ends of described valve body are connected with respectively upper end cap and lower end cap, the joint of described upper end cap and valve body is provided with seal ring and middle seal ring, the joint of described lower end cap and valve body is provided with lower seal, wherein go up seal ring and form radial seal at the inwall place of valve body with upper keying portion, described lower seal forms radial seal between the inwall place of valve body and valve body, and described middle seal ring forms end face seal between upper end cap and valve body.
Owing to having adopted said structure, the end of valve body seals by upper end cap and lower end cap, wherein upper end cap is ring structure, valve rod can be passed therethrough enter into valve body to coordinate, wherein at the valve interior wall place of the joint of upper end cap and valve body, be provided with seal ring, and be provided with kind of seal ring in the joint of upper end cap and valve body, form an end face seal, make the upper keying portion of valve rod and the upper end of valve body by upper seal ring formation motive sealing, also go up and between keying portion and valve body, form radial seal; In like manner, the valve interior wall of the joint of lower end cap and valve body is provided with lower seal, make the lower keying portion of valve rod and the lower end of valve body form motive sealing by upper seal ring, also descend between keying portion and valve body and form radial seal, according to upper seal ring and lower seal, can guarantee to form motive sealing between valve body two ends inwall and valve rod, guarantee sealing effect.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, described upper seal ring, middle seal ring and lower seal all adopt spring energy-storage seal ring.
Because seal ring adopts spring energy-storage seal ring, this kind of seal ring has elastic force, can save a part of hydraulic pressure, thereby makes its situation that seal ring there will not be hardening to lose efficacy at low temperatures, guaranteed the validity of sealing and the Security of valve.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, the part that described valve rod is arranged in valve body is logical structure, wherein valve rod bottom is provided with cavity, makes the bottom of valve rod and valve body form cavity of resorption; Described valve rod is positioned at place, valve body top and is provided with through hole, makes the outer wall of valve rod and valve body form epicoele, on described upper end cap, is connected with valve stem casing, and described valve stem casing is placed on outside valve rod, and described valve stem casing is communicated with epicoele.
Owing to having adopted said structure, between epicoele and cavity of resorption, be interconnected, this epicoele is in communication with the outside by valve stem casing simultaneously, thereby while carrying out switch when cooperatively interacting between valve rod and valve seat, between epicoele and cavity of resorption due to mutual perforation, cut-off valve in use, can avoid forming negative pressure between the lower end of valve rod and valve body, and affect the switching of this cut-off valve, can reduce cut-off valve active force in use, even if under high pressure also only need less driving force just can complete the action that opens and closes valve.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, LNG heavy caliber high pressure balance type cutting valve of the present utility model, valve body and valve rod have adopted a kind of balanced type composite structure, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve;
2, LNG heavy caliber high pressure balance type cutting valve of the present utility model, low temperature resistant, and operating temperature can reach-196 ℃; High pressure resistant, working pressure can reach 25MPa; The validity of sealing and the Security of valve have been guaranteed.
Accompanying drawing explanation
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of LNG heavy caliber high pressure balance type cutting valve of the present utility model.
Mark in figure: keying portion under keying portion, 704-in seal ring, the 701-valve rod body of rod, the upper keying of 702-portion, 703-in 1-lower end cap, 2-lower seal, 3-valve body, 4-primary seal pad, the upper seal ring of 5-, 6-upper end cap, 7-valve rod, 8-valve stem casing, 9-liquid entering hole, 10-liquid outlet, 11-.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.That is,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
As shown in Figure 1, LNG heavy caliber high pressure balance type cutting valve of the present utility model, comprise valve rod 7 and tubular valve body 3, the sealed formation valve pocket in two ends of described valve body 3, the two ends of described valve body 3 are connected with respectively upper end cap 6 and lower end cap 1, described upper end cap 6 is provided with seal ring 5 and middle seal ring 11 with the joint of valve body 3, described lower end cap 1 is provided with lower seal 2 with the joint of valve body 3, wherein going up seal ring 5 and lower seal 2 lays respectively on the inwall of valve body 3, make seal ring 5 form radial seals at the inwall place of valve body 3 with upper keying portion 702, described lower seal 2 forms radial seal between the inwall place of valve body 3 and valve body 3, simultaneously, seal ring 11 forms end face seal between upper end cap 6 and valve body 3, upper end cap 6 and valve body 3 are tightly connected, wherein said upper seal ring 5, middle seal ring 11 and lower seal 2 all adopt spring energy-storage seal ring, this kind of seal ring has elastic force, can save a part of hydraulic pressure, thereby make its situation that seal ring there will not be hardening to lose efficacy at low temperatures, the validity of sealing and the Security of valve have been guaranteed.Described valve pocket is divided into upper and lower sap cavity excessively, is provided with two mistake liquid mouths and is communicated with two mistake sap cavities respectively on the sidewall of described valve body 3, the bottom of described valve rod 7 is arranged in valve body 3 and at the two ends of valve body 3 inner wall sealing, the bottom of described valve rod 7 is provided with the upper of space, in, lower keying portion, described upper keying portion 702, middle keying portion 703 and lower keying portion 704 bottoms at described valve rod 7 are circular outer male structure, make the bottom of valve rod 7 form " king " character form structure, wherein in middle keying portion 703, being provided with primary seal pad 4 can cross sap cavities by two and separate, described primary seal pad 4 is located on the lower surface of middle keying portion 703, described middle keying portion 703 is affixed on by primary seal pad 4, on the lower passage of crossing between sap cavity, form sealing, the upper surface of the lower surface of described upper keying portion 703 and middle keying portion 703 was arranged in sap cavity, the upper surface of the upper surface of described middle keying portion 703 and lower keying portion 704 was arranged in sap cavity, the part that wherein said valve rod 7 is arranged in valve body 3 is logical structure, and wherein valve rod 7 bottoms are provided with cavity, makes the bottom of valve rod 7 and valve body 3 form cavity of resorption, described valve rod 7 is positioned at valve body 3 places, top and is provided with through hole, make outer wall and the valve body 3 of valve rod 7 form epicoele, on described upper end cap 6, be connected with valve stem casing 8, described valve stem casing 8 is placed on outside valve rod 7, described valve stem casing 8 is communicated with epicoele, while carrying out switch when cooperatively interacting between valve rod and valve seat, between epicoele and cavity of resorption due to mutual perforation, cut-off valve in use, can avoid forming negative pressure between the lower end of valve rod and valve body, and affect the switching of this cut-off valve, can reduce cut-off valve active force in use.
LNG heavy caliber high pressure balance type cutting valve of the present utility model, the sealed formation valve pocket in two ends of valve body, the active chamber that liquid passes through, the top and the bottom of described valve pocket are two and cross sap cavity, be respectively sap cavity and descended sap cavity, upper sap cavity is excessively admission chamber, therefore on the sidewall of valve body, be connected with liquid entering hole, and descended sap cavity for going out sap cavity, therefore on the sidewall of valve body, be connected with liquid outlet, above cross sap cavity and descended between sap cavity to be interconnected, valve rod extend in valve body and cooperatively interacts, wherein on the inwall at valve body two ends, form motive sealing with valve rod, valve rod can be moved with respect to valve body, can also there is good sealing effect, on the bottom of valve rod (being positioned at the part of valve body), be provided with the upper of space, in, lower keying portion, these three keying portions lay respectively at the top of valve body, middle part and bottom, and be provided with primary seal pad in middle keying portion, this primary seal pad can seal two communicating passage of crossing between sap cavity, thereby can cross sap cavity by two separates, the switch that can be used for whole cut-off valve is controlled, and upper keying portion and lower keying portion form motive sealing at the upper and lower of valve body inwall respectively, particularly, the upper surface of the lower surface of upper keying portion and middle keying portion was arranged in sap cavity, the power F2 that highly pressurised liquid is acted on open and close the power F1 on subordinate surface and act on middle keying portion upper surface is suitable, opposite direction due to F1 and F2, valve rod is cancelled substantially at the upper power F1 being subject to and the F2 crossing in sap cavity, can reduce the active force of high-pressure medium pressure to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve, in like manner, the upper surface of the upper surface of described middle keying portion and lower keying portion was arranged in sap cavity, due to the LNG passing through in whole cut-off valve or CNG, generally from crossing sap cavity to descending in sap cavity, lower mistake in sap cavity often exists hydraulic pressure equally, therefore in descending sap cavity, liquid effects in the power (F3) on middle keying subordinate surface and the power (F4) that acts on lower keying portion upper surface quite, opposite direction due to F3 and F4, the power F3 that be subject to and the F4 of valve rod in descending sap cavity is cancelled substantially, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve.LNG heavy caliber high pressure balance type cutting valve of the present utility model, the balanced type composite structure of reaching respectively in above crossing sap cavity, descending sap cavity by wherein valve body and valve rod, can reduce the active force of pressure medium to valve rod, even if under high pressure also only need less driving force just can complete the action that opens and closes valve; In addition, this cut-off valve is mainly used in the control of LNG and CNG conveying, and therefore low temperature resistant, operating temperature can reach-196 ℃; High pressure resistant, working pressure can reach 25MPa; Seal ring adopts spring energy-storage seal ring, and this kind of seal ring has elastic force, can save a part of hydraulic pressure, thereby makes its situation that seal ring there will not be hardening to lose efficacy at low temperatures, has guaranteed the validity of sealing and the Security of valve.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (6)
1.LNG heavy caliber high pressure balance type cutting valve, it is characterized in that: it comprises valve rod (7) and tubular valve body (3), the sealed formation valve pocket in two ends of described valve body (3), described valve pocket is divided into upper and lower sap cavity excessively, is provided with two mistake liquid mouths and is communicated with two mistake sap cavities respectively on the sidewall of described valve body (3); The bottom of described valve rod (7) is arranged in valve body (3) and at the two ends inner wall sealing of valve body (3), the bottom of described valve rod (7) is provided with the upper, middle and lower keying portion of space, wherein in middle keying portion (703), being provided with primary seal pad (4) can separate two mistake sap cavities, the upper surface of the lower surface of described upper keying portion (702) and middle keying portion (703) was arranged in sap cavity, and the upper surface of the upper surface of described middle keying portion (703) and lower keying portion (704) was arranged in sap cavity.
2. LNG heavy caliber high pressure balance type cutting valve as claimed in claim 1, it is characterized in that: described upper keying portion (702), middle keying portion (703) and lower keying portion (704) are circular outer male structure in the bottom of described valve rod (7), make the bottom of valve rod (7) form " king " character form structure, between described upper keying portion's (702) outer wall and valve body (3) inwall, form respectively motive sealing between lower keying portion's (704) outer wall and valve body (3) inwall.
3. LNG heavy caliber high pressure balance type cutting valve as claimed in claim 1 or 2, it is characterized in that: described primary seal pad (4) is located on the lower surface of middle keying portion (703), described middle keying portion (703) is affixed on the upper and lower passage of crossing between sap cavity and is formed sealing by primary seal pad (4).
4. LNG heavy caliber high pressure balance type cutting valve as claimed in claim 3, it is characterized in that: the two ends of described valve body (3) are connected with respectively upper end cap (6) and lower end cap (1), described upper end cap (6) is provided with seal ring (5) and middle seal ring (11) with the joint of valve body (3), described lower end cap (1) is provided with lower seal (2) with the joint of valve body (3), wherein go up seal ring (5) and form radial seal in inwall place and the upper keying portion (702) of valve body (3), described lower seal (2) forms radial seal between the inwall place of valve body (3) and valve body (3), described middle seal ring (11) is positioned between upper end cap (6) and valve body (3) and forms end face seal.
5. LNG heavy caliber high pressure balance type cutting valve as claimed in claim 4, is characterized in that: described upper seal ring (5), middle seal ring (11) and lower seal (2) all adopt spring energy-storage seal ring.
6. the LNG heavy caliber high pressure balance type cutting valve as described in claim 1 or 2 or 4 or 5, it is characterized in that: the part that described valve rod (7) is arranged in valve body (3) is logical structure, wherein valve rod (7) bottom is provided with cavity, makes the bottom of valve rod (7) and valve body (3) form cavity of resorption; Described valve rod (7) is positioned at place, valve body (3) top and is provided with through hole, make outer wall and the valve body (3) of valve rod (7) form epicoele, on described upper end cap (6), be connected with valve stem casing (8), described valve stem casing (8) is placed on outside valve rod (7), and described valve stem casing (8) is communicated with epicoele.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573527.4U CN203442156U (en) | 2013-09-17 | 2013-09-17 | Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573527.4U CN203442156U (en) | 2013-09-17 | 2013-09-17 | Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203442156U true CN203442156U (en) | 2014-02-19 |
Family
ID=50093213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320573527.4U Withdrawn - After Issue CN203442156U (en) | 2013-09-17 | 2013-09-17 | Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203442156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470779A (en) * | 2013-09-17 | 2013-12-25 | 成都华气厚普机电设备股份有限公司 | LNG (liquefied natural gas) large-caliber high-pressure balanced shut-off valve |
-
2013
- 2013-09-17 CN CN201320573527.4U patent/CN203442156U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470779A (en) * | 2013-09-17 | 2013-12-25 | 成都华气厚普机电设备股份有限公司 | LNG (liquefied natural gas) large-caliber high-pressure balanced shut-off valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2009056840A3 (en) | Subsea assembly | |
| NZ602388A (en) | Valve system | |
| SG135177A1 (en) | Pressure balanced fluid control device | |
| SA521430773B1 (en) | High Pressure Sealing Tool for Use in Downhole Environment | |
| CN203442156U (en) | Large-caliber high pressure balanced type cut-off valve for LNG (liquefied natural gas) | |
| GB201319946D0 (en) | Valve stem seal arrangement | |
| CN201330864Y (en) | Metal hard seal ball valve provided with flexible sealing system | |
| CN103470779A (en) | LNG (liquefied natural gas) large-caliber high-pressure balanced shut-off valve | |
| CN201443604U (en) | Piston balanced valve | |
| CN203176506U (en) | Manual operation and hydraulic pressure combined normally-open valve | |
| CN104100232B (en) | A kind of double-piston hydraulic switch and its application | |
| CN105987195A (en) | Casing pipe type straight valve | |
| CN210240600U (en) | Helium-level elastic double-sealing stop valve clack structure | |
| CN204493840U (en) | Cryogenic pipe solenoid valve | |
| CN207145634U (en) | A kind of pilot-operated type adjusting valve valve core structure | |
| CN201884704U (en) | Novel spherical valve with double block and drain structure | |
| CN204300411U (en) | A kind of Novel main moving sealed ball valve | |
| CN204025797U (en) | Reduction valve | |
| CN205078886U (en) | Automatically controlled on -off valve of direct action type | |
| CN205479398U (en) | Pottery stop valve | |
| CN206017919U (en) | A kind of gas pressure reducer | |
| CN205978791U (en) | A pressure release structure for soft seal ball valve valve pocket | |
| CN203230385U (en) | Double-valve device of casing external packer | |
| CN204082090U (en) | A kind of external casing packer control valve system | |
| CN203147018U (en) | Ultralow-temperature valve and valve rod triple sealing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140219 Effective date of abandoning: 20161026 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |