CN108869866B - Disk seat flashboard shearing combined mechanism and shearing type safety valve - Google Patents
Disk seat flashboard shearing combined mechanism and shearing type safety valve Download PDFInfo
- Publication number
- CN108869866B CN108869866B CN201810770688.XA CN201810770688A CN108869866B CN 108869866 B CN108869866 B CN 108869866B CN 201810770688 A CN201810770688 A CN 201810770688A CN 108869866 B CN108869866 B CN 108869866B
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- Prior art keywords
- valve seat
- shearing
- valve
- steel cable
- flashboard
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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
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a valve seat and gate plate shearing combined mechanism which comprises a gate plate and a valve seat which are matched with each other, wherein a gate plate embedded type knife sleeve is arranged on one side of the gate plate close to the valve seat, and a valve seat embedded type knife sleeve matched with the gate plate embedded type knife sleeve is arranged on one side of the valve seat close to the gate plate; the gate plate embedded type knife sleeve comprises a first shearing cutting edge matched with the valve seat embedded type knife sleeve, a first shearing sliding surface close to the valve seat, a first steel cable pre-tightening area and a steel cable recovery area, wherein the first steel cable pre-tightening area is positioned on one side of the first shearing cutting edge, which is far away from the first shearing sliding surface; the embedded knife pouch of disk seat include with first shearing blade matched with second shearing blade, with first shearing slip plane mutually supported second shearing slip plane, be located second shearing blade is kept away from the second wire rope pretension district of flashboard one side. The valve seat flashboard shearing combination mechanism can rapidly shear a steel cable under an emergency condition.
Description
Technical Field
The invention relates to the technical field of safety valves, in particular to a valve seat flashboard shearing combined mechanism and a shearing type safety valve comprising the same.
Background
The device is applied to the Christmas tree with extremely bad working conditions, and can cut off the steel cable in time and close the well hole quickly in a blowout state so as to avoid safety accidents. The valve seat structure used by the shear type safety valve in the prior art is poor in shearing effect and basically is a disposable product, after once shearing operation, the valve seat and the gate plate are out of work and must be replaced, so that the working strength of personnel is increased, the cost is increased, and safety accidents can possibly occur.
Disclosure of Invention
In view of the above, in order to overcome the defects of the prior art, an object of the present invention is to provide a valve seat and gate shearing combination mechanism capable of rapidly shearing a steel cable, and the valve seat and gate shearing combination mechanism can realize multiple shearing operations and has a long service life.
In order to achieve the purpose, the invention adopts the following technical scheme:
a valve seat and gate plate shearing combined mechanism comprises a gate plate and a valve seat which are matched with each other, wherein a gate plate embedded type knife sleeve is arranged on one side of the gate plate close to the valve seat, and a valve seat embedded type knife sleeve matched with the gate plate embedded type knife sleeve is arranged on one side of the valve seat close to the gate plate; the gate plate embedded type knife sleeve comprises a first shearing cutting edge matched with the valve seat embedded type knife sleeve, a first shearing sliding surface close to the valve seat, a first steel cable pre-tightening area and a steel cable recovery area, wherein the first steel cable pre-tightening area is positioned on one side of the first shearing cutting edge, which is far away from the first shearing sliding surface; the embedded knife pouch of disk seat include with first shearing blade matched with second shearing blade, with first shearing slip plane mutually supported second shearing slip plane, be located second shearing blade is kept away from the second wire rope pretension district of flashboard one side. Through setting up the embedded knife pouch of flashboard and the embedded knife pouch of disk seat mutually supporting, can cut off the steel cable fast.
Preferably, the valve seat comprises a front end valve seat and a rear end valve seat, the valve seat embedded type cutter sleeve is arranged on the front end valve seat, and the rear end valve seat is provided with an embedded sleeve close to one side of the flashboard. When the rope cutting device is used, the front valve seat is positioned below the rear valve seat, and the rope cutting opening is close to the position of the front valve seat. The embedding sleeve is matched with one side, away from the front end valve seat, of the flashboard embedded cutter sleeve, does not have a shearing function, and is only matched and sealed with the flashboard.
More preferably, the inner bore diameter of the rear valve seat is 0.25-0.5 cable diameter wider than the inner bore diameter of the front valve seat. The inner hole diameter of the rear end valve seat is wider than that of the front end valve seat, so that the steel cable at the upper end can be timely separated from the gate plate under the condition that the steel cable is cut by the gate plate embedded type knife sleeve and the valve seat embedded type knife sleeve in a matched mode, and the valve is closed timely.
Preferably, the first shear slide face and the second shear slide face have a surface roughness of 0.1 to 0.2. The lower surface roughness enables a better fit of the first and second shear slide faces, shearing more rapidly.
Preferably, the first cutting edge and the second cutting edge are mutually matched right-angle cuts. The provision of a right angle cut enables the cable to be cut more quickly.
Preferably, the included angle between the first cable pre-tightening area and the valve seat central line and the included angle between the second cable pre-tightening area and the valve seat central line are 30-60 degrees, that is, the top of the first shearing cutting edge is higher than the bottom of the first cable pre-tightening area, and similarly, the top of the second shearing cutting edge is higher than the bottom of the second cable pre-tightening area. Set up like this and can cut off the steel cable more rapidly on the one hand, on the other hand can make the steel cable of incision top can in time break away from the flashboard. When the valve is horizontally placed, the central line of the valve seat is in the horizontal direction, and the included angle between the first steel cable pre-tightening area and the horizontal plane and the included angle between the second steel cable pre-tightening area and the horizontal plane are 30-60 degrees; after the valve is installed, the central line of the valve seat is in the vertical direction, and the included angle between the first steel cable pre-tightening area and the vertical plane is 30-60 degrees. In some embodiments, the included angle is preferably 45 °.
Preferably, the wire rope recovery area is a slope, and the vertical distance between the highest point and the lowest point of the slope is 0.5-1 wire rope diameter. Through the steel cable recovery area that sets up certain slope for the steel cable can in time break away from the flashboard.
More preferably, the angle between the wire rope recovery area and the center line of the valve seat is 5-15 degrees. When the valve is horizontally placed, the central line of the valve seat is in the horizontal direction, and the included angle between the steel cable recovery area and the horizontal plane is 5-15 degrees; after the valve is installed, the central line of the valve seat is in the vertical direction, and the included angle between the steel cable recovery area and the vertical surface is 5-15 degrees. In some embodiments, the included angle is preferably 10 °.
The invention also provides a shear type safety valve which comprises a valve body, a valve seat, a gate plate, a valve cover, a valve rod and the valve seat and gate plate shearing combination mechanism, wherein the valve seat and gate plate shearing combination mechanism is arranged on the valve cover, the valve rod is arranged in the valve cover in a manner of rotating around the axial direction of the valve rod, the lower end of the valve rod is in threaded connection with the gate plate, a middle cavity sealing ring is arranged between the valve cover and the valve body, and a sealing element is arranged between the valve seat and the valve body. The sealing element comprises an outer ring sealing ring and an inner ring sealing ring which are arranged on one side of the valve seat close to the valve body. The valve seat flashboard shearing combination mechanism is arranged in the shearing type safety valve, so that the valve can rapidly cut off the steel cable in an emergency, the valve can be closed in time, multiple cutting operations can be carried out, and the service life is long.
Compared with the prior art, the invention adopting the technical scheme has the advantages that: the valve seat flashboard shearing combined mechanism has the following advantages:
1. the valve seat flashboard shearing combined mechanism can rapidly shear a steel cable under an emergency condition, and is particularly suitable for the condition that the diameter of the steel cable is less than 13 mm;
2. the valve seat and gate plate shearing combined mechanism can perform shearing operation for multiple times, and service lives of the valve seat and the gate plate are prolonged to the greatest extent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a cross-sectional view of a shear relief valve in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic illustration of a valve seat and gate shear combining mechanism according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the valve seat and gate shearing combination mechanism with the gate-embedded cutter sleeve and the valve seat-embedded cutter sleeve matched with each other;
in the drawings: the valve comprises a valve body-1, a gate-2, a gate embedded cutter sleeve-21, a first shearing sliding surface-22, a first shearing cutting edge-23, a first steel cable pre-tightening area-24, a steel cable recovery area-25, an outer ring sealing element-3, an inner ring sealing element-4, a front end valve seat-5, a valve seat embedded cutter sleeve-51, a second steel cable pre-tightening area-52, a second shearing sliding surface-53, a second shearing cutting edge-54, a reverse sealing bulge-6, a middle cavity sealing ring-7, a valve cover-8, a valve rod-9, a rod sealing component-10, a packing gland-11, a rear end valve seat-12, an embedded sleeve-121, a nut-13 and a stud-14.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Referring to fig. 1-3, the shear type safety valve of this embodiment includes a valve body 1, a valve seat, a gate plate 2, a valve cap 8, a valve rod 9, and a valve seat and gate plate shearing combination mechanism disposed between the valve seat and the gate plate 2, the valve cap 8 is provided with a rod sealing assembly 10 and a gland 11, the valve rod 9 is disposed in the valve cap 8 in a manner of rotating around its own axial direction, the lower end of the valve rod 9 is connected with the gate plate 2 by a thread, one end of the valve rod 9 close to the gate plate 2 is further provided with a reverse sealing protrusion 6, a middle cavity sealing ring 7 is disposed between the valve cap 8 and the valve body 1, a sealing member is disposed between the valve seat and the valve body 1, the sealing member in this embodiment includes an outer ring 3 and an inner ring 4 disposed on one side of the valve seat. The shear type safety valve is provided with the valve seat flashboard shear combination mechanism, so that the valve can rapidly cut off the steel cable under emergency, the valve can be closed in time, the multiple cutting operations can be carried out, and the service life is long.
The valve seat and gate plate shearing combined mechanism of the embodiment comprises a gate plate embedded type cutter sleeve 21 arranged on one side of a gate plate 2 close to a valve seat and a valve seat embedded type cutter sleeve 51 which is arranged on one side of the valve seat close to the gate plate 2 and is matched with the gate plate embedded type cutter sleeve 21. Through setting up the embedded knife pouch of flashboard 21 and the embedded knife pouch of valve seat 51 that mutually support, can cut off the steel cable fast, in time close the valve, avoid taking place the incident.
As shown in fig. 2 to 3, the shutter-embedded knife sheath 21 includes a first shearing edge 23 which is engaged with the valve seat-embedded knife sheath 51, a first shearing sliding surface 22 on the side close to the valve seat, a first wire pre-tightening region 24 and a wire recovery region 25 on the side of the first shearing edge 23 away from the first shearing sliding surface 22.
As shown in fig. 2 to 3, the valve seat-embedded knife sleeve 51 includes a second shearing cutting edge 54 cooperating with the first shearing cutting edge 23, a second shearing sliding surface 53 cooperating with the first shearing sliding surface 22, and a second wire pre-tensioning region 52 located on a side of the second shearing cutting edge 54 away from the shutter 2.
As shown in fig. 1-2, the valve seat of the present embodiment comprises a front valve seat 5 and a rear valve seat 12, wherein, in use, the front valve seat 5 is located below the rear valve seat 12, and the cable scission is located close to the front valve seat 5. The valve seat embedded type cutter sleeve 51 is arranged on the front end valve seat 5, the embedded sleeve 121 is arranged on one side, close to the flashboard 2, of the rear end valve seat 12, the embedded sleeve 121 is matched with one side, away from the front end valve seat 5, of the flashboard embedded type cutter sleeve 21, the embedded sleeve 121 does not have a shearing function and is only matched and sealed with the flashboard 2. The shutter-embedded cutter set 21, the valve seat-embedded cutter set 51, and the embedded set 121 in this embodiment are fixed to the shutter 2, the front end valve seat 5, and the rear end valve seat 12, respectively, by a shrink-fit process or an extrusion process.
In order to ensure that the upper steel cable can be separated from the shutter 2 in time and the valve can be closed in time under the condition that the steel cable is sheared by the cooperation of the shutter embedded knife sleeve 21 and the valve seat embedded knife sleeve 51, the inner bore diameter of the rear valve seat 12 is larger than that of the front valve seat 5, and the inner bore diameter of the rear valve seat 12 in the embodiment is wider than that of the front valve seat 5 by the diameter of 0.25-0.5 steel cable.
In order to be able to cut the wire rope more quickly, the surface roughness of the first shearing sliding surface 22 and the second shearing sliding surface 53 is 0.1-0.2 and the first shearing edge 23 and the second shearing edge 54 are right-angle cuts that fit each other in this embodiment. The lower surface roughness enables a better fit of the first 22 and second 53 shear slide faces, shearing more rapidly; the provision of a right angle cut also enables the cable to be cut more quickly.
As shown in fig. 2-3, the first and second cable pre-tensioning regions 24, 52 are preferably angled at 30-60 ° to the valve seat centerline, which in this embodiment is preferably 45 °. First cable pre-tensioning zone 24 and second cable pre-tensioning zone 52 are sloped, i.e. the top of first cutting edge 23 is higher than the bottom of first cable pre-tensioning zone 24, and similarly, the top of second cutting edge 54 is higher than the bottom of second cable pre-tensioning zone 52. Set up like this and can cut off the cable more rapidly on the one hand, on the other hand can make the cable above the shear gap can in time break away from flashboard 2. When the valve is horizontally placed, the central line of the valve seat is in the horizontal direction, and the included angle between the first steel cable pre-tightening area 24 and the horizontal plane and the included angle between the second steel cable pre-tightening area 52 and the horizontal plane are 45 degrees; after the valve is installed, the central line of the valve seat is in the vertical direction, and the included angle between the first steel cable pre-tightening area 24 and the vertical plane and the second steel cable pre-tightening area 52 is 45 degrees.
As shown in fig. 3, the wire rope recovery area 25 is a slope, one end of the slope close to the first wire rope pre-tightening area 24 is a highest point, one end of the slope close to the rear end valve seat 12 is a lowest point, the vertical distance between the highest point and the lowest point of the slope is different by 0.5-1 wire rope diameter, and the included angle between the wire rope recovery area 25 and the valve seat central line is about 5-15 degrees. When the valve is horizontally placed, the central line of the valve seat is in the horizontal direction, and the included angle between the steel cable recovery area 25 and the horizontal plane is 5-15 degrees; after the valve is installed, the central line of the valve seat is in the vertical direction, and the included angle between the steel cable recovery area 25 and the vertical surface is 5-15 degrees. The angle is preferably 10 in this embodiment. Through setting up the wire rope recovery area 25 that has certain slope for the wire rope can break away from the flashboard in time.
If the diameter of the steel cable used is 6.75mm, the inner bore diameter of the rear valve seat 12 is 1.6875mm-3.375mm wider than the inner bore diameter of the front valve seat 5; the included angle between the first steel cable pre-tightening area 24 and the second steel cable pre-tightening area 52 and the central line of the valve seat is about 45 degrees; the vertical distance between the highest point and the lowest point of the wire rope recovery area 25 is different from 3.375mm to 6.75 mm; the angle between the wire rope recovery area 25 and the central line of the valve seat is about 10 degrees.
The working process of the shear safety valve of the embodiment when shearing a steel cable is briefly described as follows:
as shown in fig. 1, the shear type safety valve of the present embodiment is a hydraulically or pneumatically driven, single seat, one-way operated safety valve. Wherein valve rod 9 passes valve gap 8, and the upper end of valve rod 9 is connected with the driver, and the lower extreme of valve rod 9 passes through threaded connection with flashboard 2. The valves are switched by hydraulic or pneumatic operation to achieve rapid relative shear movement between the shutter 2 and the front valve seat 5.
In case of an emergency where the wire rope is to be cut, the valve rod 9 moves the shutter 2 upward. The second shear sliding face 53 and the first shear sliding face 22 are in close contact and the first shear sliding face 22 makes sliding movement with respect to the second shear sliding face 53. When the shutter 2 reaches a certain position fast, the second shearing edge 54 and the first shearing edge 23 contact with the wire rope to be sheared respectively, and according to the momentum theorem, the short-time momentum of the shutter 2 is converted into shearing energy. The point of contact of the second cutting edge 54 and the first cutting edge 23 with the wire rope at which the cutting of the wire rope is started can be regarded as an instantaneous fixing point. At this time, under the combined action of the second cable pre-tightening section 52 and the first cable pre-tightening section 24, the cable between the two sections is instantaneously tensioned, so as to fix the cable shearing angle, reduce the required energy, and rapidly cut the cable. Under the action of the wire rope recovery area 25, the wire rope has only one shearing opening. And because the first steel cable pretension area 24 and the steel cable recovery area 25 have certain gradients, and the inner aperture of the rear end valve seat 12 is larger than that of the front end valve seat 5, the downstream steel cable can be separated from the gate plate channel in time before the gate plate 2 reaches the position of the closing valve, so that the valve is ensured to be safely and timely closed.
The valve seat flashboard shearing combined mechanism can rapidly shear a steel cable under an emergency condition, and is particularly suitable for the condition that the diameter of the steel cable is less than 13 mm; and can carry out shearing operation many times, the life of at utmost extension disk seat and flashboard.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a disk seat flashboard shears combined mechanism, includes mutually supporting flashboard and disk seat, its characterized in that: a flashboard embedded knife sleeve is arranged on one side of the flashboard close to the valve seat, and a valve seat embedded knife sleeve matched with the flashboard embedded knife sleeve is arranged on one side of the valve seat close to the flashboard; the gate plate embedded type knife sleeve comprises a first shearing cutting edge matched with the valve seat embedded type knife sleeve, a first shearing sliding surface close to the valve seat, a first steel cable pre-tightening area and a steel cable recovery area, wherein the first steel cable pre-tightening area is positioned on one side of the first shearing cutting edge, which is far away from the first shearing sliding surface; the valve seat embedded type knife sleeve comprises a second shearing cutting edge matched with the first shearing cutting edge, a second shearing sliding surface matched with the first shearing sliding surface, and a second steel cable pre-tightening area located on one side, far away from the flashboard, of the second shearing cutting edge; the included angle between the first steel cable pre-tightening area and the valve seat central line and the included angle between the second steel cable pre-tightening area and the valve seat central line are 30-60 degrees.
2. The valve seat and gate shear combination of claim 1, wherein: the valve seat comprises a front end valve seat and a rear end valve seat, the embedded cutter sleeve of the valve seat is arranged on the front end valve seat, and the embedded sleeve is arranged on one side, close to the flashboard, of the rear end valve seat.
3. A valve seat and gate shear combination as defined in claim 2, wherein: the inner bore diameter of the rear valve seat is wider than the inner bore diameter of the front valve seat by 0.25-0.5 cable diameter.
4. The valve seat and gate shear combination of claim 1, wherein: the first shear sliding surface and the second shear sliding surface have a surface roughness of 0.1 to 0.2.
5. The valve seat and gate shear combination of claim 1, wherein: the first shearing cutting edge and the second shearing cutting edge are right-angle notches matched with each other.
6. The valve seat and gate shear combination of claim 1, wherein: the steel cable recovery area is a slope, and the vertical distance between the highest point and the lowest point of the slope is 0.5-1 steel cable diameter.
7. The valve seat and gate shear combination of claim 6, wherein: the included angle between the steel cable recovery area and the central line of the valve seat is 5-15 degrees.
8. A shear type safety valve comprises a valve body, a valve seat, a gate plate, a valve cover and a valve rod, wherein a rod sealing assembly and a packing gland are arranged on the valve cover, the valve rod can be arranged in the valve cover in a rotating mode around the axial direction of the valve rod, the lower end of the valve rod is in threaded connection with the gate plate, a middle cavity sealing ring is arranged between the valve cover and the valve body, and a sealing piece is arranged between the valve seat and the valve body, and the shear type safety valve is characterized in that: the shear relief valve further comprises a seat and ram shear combination as claimed in any one of claims 1 to 7.
9. A shear-type safety valve according to claim 8, wherein: the sealing element comprises an outer ring sealing ring and an inner ring sealing ring which are arranged on one side of the valve seat close to the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770688.XA CN108869866B (en) | 2018-07-13 | 2018-07-13 | Disk seat flashboard shearing combined mechanism and shearing type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770688.XA CN108869866B (en) | 2018-07-13 | 2018-07-13 | Disk seat flashboard shearing combined mechanism and shearing type safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108869866A CN108869866A (en) | 2018-11-23 |
| CN108869866B true CN108869866B (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810770688.XA Active CN108869866B (en) | 2018-07-13 | 2018-07-13 | Disk seat flashboard shearing combined mechanism and shearing type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108869866B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4997162A (en) * | 1989-07-21 | 1991-03-05 | Cooper Industries, Inc. | Shearing gate valve |
| GB2286652A (en) * | 1994-02-09 | 1995-08-23 | Fmc Corp | Wire cutting insert for gate valve |
| US5713581A (en) * | 1994-10-03 | 1998-02-03 | Hydril Company | Fibrous seal for blowout preventer |
| CN201129166Y (en) * | 2007-12-17 | 2008-10-08 | 王政权 | Shearing flashboard valve |
| CN201884690U (en) * | 2010-12-21 | 2011-06-29 | 上海神开石油化工装备股份有限公司 | Super-high pressure flat plate gate valve |
| CN103115156A (en) * | 2011-11-16 | 2013-05-22 | 韦特柯格雷公司 | Gate shear valve |
-
2018
- 2018-07-13 CN CN201810770688.XA patent/CN108869866B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4997162A (en) * | 1989-07-21 | 1991-03-05 | Cooper Industries, Inc. | Shearing gate valve |
| GB2286652A (en) * | 1994-02-09 | 1995-08-23 | Fmc Corp | Wire cutting insert for gate valve |
| US5713581A (en) * | 1994-10-03 | 1998-02-03 | Hydril Company | Fibrous seal for blowout preventer |
| CN201129166Y (en) * | 2007-12-17 | 2008-10-08 | 王政权 | Shearing flashboard valve |
| CN201884690U (en) * | 2010-12-21 | 2011-06-29 | 上海神开石油化工装备股份有限公司 | Super-high pressure flat plate gate valve |
| CN103115156A (en) * | 2011-11-16 | 2013-05-22 | 韦特柯格雷公司 | Gate shear valve |
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| Publication number | Publication date |
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| CN108869866A (en) | 2018-11-23 |
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