CN200949447Y - Petroleum wellhead gate valve - Google Patents
Petroleum wellhead gate valve Download PDFInfo
- Publication number
- CN200949447Y CN200949447Y CN 200620120258 CN200620120258U CN200949447Y CN 200949447 Y CN200949447 Y CN 200949447Y CN 200620120258 CN200620120258 CN 200620120258 CN 200620120258 U CN200620120258 U CN 200620120258U CN 200949447 Y CN200949447 Y CN 200949447Y
- Authority
- CN
- China
- Prior art keywords
- valve stem
- valve
- oblate
- head
- arc surface
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Sliding Valves (AREA)
Abstract
The utility model relates to an oil wellhead gate valve, belonging to oil drilling and mining engineering wellhead equipment technology field. The utility model comprises a valve body (1), a valve seat (2), a gate disc (3), a valve cover (4) and a valve stem (8), and is characterized in that the lower end of the valve stem is provided with an oblate valve stem head (11), the round peripheral of the oblate valve stem head is set up into outer convex arc surface, correspondingly the upper end of the gate disc is provided with a round hole opened upwards, the round hole inner groove surface (12) is set up into concave arc surface, the oblate valve stem head is mounted in the round hole inner groove surface (12) of the gate disc, the oblate valve stem head is connected with the gate disc through arc surface; the valve stem is connected with the oblate valve stem head through a thread; due to the valve stem is connected with the gate disc through arc surface contact, the contact area between the top end of the valve stem and the gate disc is increased, and the stress distribution of the interface is improved, under the condition of the valve stem forced, a slight incline in arbitrary direction is allowed, and the stress concentration cannot be generated on the interface of the gate disc; meanwhile due to the radial force produced by the arc surface, the incline of valve stem can be righted effectively, and the friction between the valve stem and seal ring be reduced, so as to reduce the switch moment; then the stability of the valve stem can be improved and the service life is prolonged.
Description
Technical field:
The utility model relates to a kind of oil well head gate valve, belongs to petroleum engineering wellhead equipment technical field.
Background technology:
In oil development drilling well, petroleum production engineering, the wellhead equipment device is to be used for control and the guiding oil (device of annular space and creation downhole testing operating condition between stream, sealing production casing and the oil pipe, being the bearing device of control flowing tubing head pressure and crude gas stream amount, is the important ground installation that control oil (gas) well is produced.In whole wellhead equipment device, the well head gate valve plays significant feature, is the critical piece in the wellhead equipment device.The gate valve kind that adopts in the wellhead equipment device at present is many, such as, elevating lever Wedge Gate Valves (single disc, double disc), swingle wedge-type single disc, elevating lever run-in index single disc, elevating lever run-in index double disc and swingle run-in index single disc etc.The structure of their valve rod and flashboard all adopts I-shape construction to be connected with connected mode basically.When the gate valve opening and closing, be the lifting that relies on valve rod, by the pull-up of valve rod head with push flashboard and fulfil assignment.There are following some deficiency in this structure and connected mode.
(1) when opening and closing, because valve rod is subjected to bigger axial force or valve rod head discontinuity, can a little offsetting dip appear on a certain direction, make valve rod and sealing ring produce friction, increased the switch moment of gate valve.
(2) when valve rod tilts, set upright timely if can not get, can produce stress at valve rod and flashboard contact surface concentrates, increased the stress of valve rod head and flashboard contact surface, make the contact position of valve rod head and flashboard and valve rod head be easy to generate fracture damage, influenced the application life of oil well head gate valve.
Summary of the invention:
In order to overcome the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of novel oil well head gate valve.
The utility model is to realize above-mentioned purpose by following technical solution.
In the oil well head gate valve, be provided with valve body (1), valve seat (2), flashboard (3), valve gap (4), valve rod (8), handwheel (10) etc., be provided with an oblate stem head (11) in the lower end of valve rod, the circumferential edge of oblate stem head also is arranged to outer convex arc surface, corresponding with it, have the circular port of a upper shed in the upper end of flashboard, circular hole inner groove surface (12) is arranged to interior concaved circular cambered surface.Oblate stem head is placed in the circular hole inner groove surface (12) on the flashboard, make to form the arc surface circular groove type between oblate stem head and the flashboard and be connected; Between valve rod and the oblate stem head by being threaded.
The utility model compared with prior art has following beneficial effect:
Owing to adopt the contact of arc surface circular groove type to connect between valve rod and the flashboard, increased the contact area between valve rod head and the flashboard, improved the stress distribution of contact surface, make valve rod under stressed situation, on allowing in any direction a little inclination is arranged, on the flashboard contact surface, also can not produce stress and concentrate; Because the radial load that arc surface produces can be set upright valve rod effectively, reduced the friction of valve rod and sealing ring, thereby reduced the switch moment of gate valve simultaneously; Improve the stability of valve rod, prolonged the application life of gate valve.
Description of drawings:
Fig. 1 is the general structure schematic diagram of the utility model oil well head gate valve.
Fig. 2 is the utility model oil well head gate valve rod part-structure schematic diagram.
Fig. 3 is the utility model oil well head gate valve flashboard part-structure schematic diagram.
In the drawings, 1. valve body, 2. valve seat, 3. flashboard, 4. valve gap, 5. Supporting ring, 6. sealing ring, 7. sealing shroud, 8. valve rod, 9. bearing, 10. handwheel, 11. oblate stem heads, 12. circular hole inner groove surfaces.
The specific embodiment:
This oil well head gate valve is made up of valve body (1), valve seat (2), flashboard (3), valve gap (4), Supporting ring (5), sealing ring (6), sealing shroud (7), valve rod (8), bearing (9), handwheel (10) etc.Be provided with an oblate stem head (11) in the lower end of valve rod, between valve rod and the oblate stem head by being threaded, the circumferential edge of oblate stem head also is arranged to outer convex arc surface, corresponding with it, have the circular port of a upper shed in the upper end of flashboard, circular hole inner groove surface (12) is arranged to interior concaved circular cambered surface.Oblate stem head is placed in the circular hole inner groove surface (12) on the flashboard, make to form the arc surface circular groove type between oblate stem head and the flashboard and be connected.With valve rod with together place in the valve body after flashboard is connected.Supporting ring is positioned at the below of sealing ring, and sealing shroud is positioned at the top of sealing ring, and Supporting ring, sealing ring and sealing shroud all are enclosed within on the valve rod, are installed in the valve gap.Tighten up by the nut connection between valve gap and the valve body.
Claims (2)
1, a kind of oil well head gate valve of forming by valve body (1), valve seat (2), flashboard (3), valve gap (4), valve rod (8) etc., it is characterized in that being provided with an oblate stem head (11) in the lower end of valve rod, the circumferential edge of oblate stem head also is arranged to outer convex arc surface, corresponding with it, have the circular port of a upper shed in the upper end of flashboard, circular hole inner groove surface (12) is arranged to interior concaved circular cambered surface, oblate stem head is placed in the circular hole inner groove surface (12) on the flashboard, make to form the arc surface circular groove type between oblate stem head and the flashboard and be connected.
2, oil well head gate valve according to claim 1 is characterized in that between valve rod and the oblate stem head by being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620120258 CN200949447Y (en) | 2006-06-19 | 2006-06-19 | Petroleum wellhead gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620120258 CN200949447Y (en) | 2006-06-19 | 2006-06-19 | Petroleum wellhead gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200949447Y true CN200949447Y (en) | 2007-09-19 |
Family
ID=38891990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620120258 Expired - Fee Related CN200949447Y (en) | 2006-06-19 | 2006-06-19 | Petroleum wellhead gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200949447Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384277A (en) * | 2010-08-31 | 2012-03-21 | 盐城神华机械制造有限公司 | High-pressure resistant hard-seal flat valve |
| CN106838354A (en) * | 2015-12-05 | 2017-06-13 | 洪奕祥 | A kind of Novel high-end oil gate valve |
| CN113216891A (en) * | 2021-04-21 | 2021-08-06 | 江苏腾龙石化机械有限公司 | Unfreezing petroleum wellhead |
-
2006
- 2006-06-19 CN CN 200620120258 patent/CN200949447Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384277A (en) * | 2010-08-31 | 2012-03-21 | 盐城神华机械制造有限公司 | High-pressure resistant hard-seal flat valve |
| CN106838354A (en) * | 2015-12-05 | 2017-06-13 | 洪奕祥 | A kind of Novel high-end oil gate valve |
| CN113216891A (en) * | 2021-04-21 | 2021-08-06 | 江苏腾龙石化机械有限公司 | Unfreezing petroleum wellhead |
| CN113216891B (en) * | 2021-04-21 | 2022-05-31 | 江苏腾龙石化机械有限公司 | Unfreezing petroleum wellhead |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201747324U (en) | Hydraulic actuator for valve | |
| CN108105420B (en) | High-pressure water pump outlet control valve | |
| CN207018556U (en) | Can on-line maintenance upper dress flat gate valve | |
| CN200949447Y (en) | Petroleum wellhead gate valve | |
| CN209262295U (en) | A kind of high voltagehigh frequency time switch taper adjustable sealing structure plug valve | |
| CN201925504U (en) | Square integrated-cover-type hand-operated rising-stem wedge-shaped gate valve | |
| CN2806910Y (en) | Gate vale with parallel double gate plates capable of generating initial seal force by inclined plane | |
| CN209909221U (en) | Critical ball valve | |
| CN103307302B (en) | Dress formula low temperature floating ball valve in one | |
| CN2898364Y (en) | Valve of borehole with uniform-strength structure | |
| CN205225141U (en) | Wellhead assembly of dribbling valve backpressure function | |
| CN205401805U (en) | Double track way groove ball valve sealed firmly | |
| CN2709772Y (en) | Protection device for preventing overfilling of liquified petroleum gas cylinder | |
| CN208934643U (en) | A kind of PR2 grade tubing head of special construction | |
| CN203335918U (en) | Up-mounted type low-temperature floating ball valve | |
| CN201250916Y (en) | Wedge-type dual encapsulation differential-swing double disc valve | |
| CN201202438Y (en) | Screw pump rod tube safety valve driven by rod | |
| CN219242677U (en) | Novel self-balancing gate valve | |
| CN202790593U (en) | High temperature balanced type stop valve | |
| CN212429821U (en) | Top-mounted type hemisphere valve special for sludge | |
| CN2828307Y (en) | Arrow drilling tool check valve | |
| CN213512117U (en) | Balance structure of flat stop valve | |
| CN2818957Y (en) | High-pressure float valve | |
| CN218971158U (en) | Large-drift-diameter ultrahigh-pressure sulfur-resistant wellhead device | |
| CN217762144U (en) | Bushing type cock valve with floating cock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |