CN201170079Y - Shutter shaft seal flow leakage valve - Google Patents
Shutter shaft seal flow leakage valve Download PDFInfo
- Publication number
- CN201170079Y CN201170079Y CNU2008200742105U CN200820074210U CN201170079Y CN 201170079 Y CN201170079 Y CN 201170079Y CN U2008200742105 U CNU2008200742105 U CN U2008200742105U CN 200820074210 U CN200820074210 U CN 200820074210U CN 201170079 Y CN201170079 Y CN 201170079Y
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- side door
- flashboard
- valve body
- 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
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Abstract
The utility model discloses a sealing venting valve for a flashboard shaft, comprising a side door (1), a sealing ring (2), a valve core (3), a valve rod (4), a valve body (5), and a valve seat (6), wherein the valve core (3), the valve rod (4) and the valve seat (6) are arranged inside the valve body (4), and the valve body (4) is fixedly connected with the lower part of the side door (1). The venting valve is generally in a normally open state so that an alternate sealing ring of a flashboard shaft sealing group is in an unpressed state. When a leakage occurs at the primary sealing position of the flashboard shaft, the leakage can be observed through the venting valve. The fact that the venting valve is closed at this point can start the alternate sealing ring to participate in sealing. The safety of the venting valve is enhanced, which equals to that a suite of alternate sealing is arranged at the sealing point of the flashboard shaft.
Description
Affiliated technical field
The utility model belongs to oil drilling facility parts, is meant a kind of flashboard axis sealing eduction valve that is used on the oil drilling especially.
Background technology
Preventer is the visual plant in the modern oil drilling, and it mainly acts on is the generation that prevents gas blowout accident in drilling process.Ram preventer is a kind of of preventer, and the oil cylinder that it is mainly closed by pressure-bearing shell, side door, flashboard, driving flashboard etc. is formed.Its operating principle is: by the oil cylinder of preventer both sides, promotes flashboard and moves to wellbore centre, and after the both sides flashboard closes up, annular space (drilling tool is arranged in the well) or sealing well head (empty well) in the sealed well.The flashboard axis sealing is one of most important sealing of ram preventer, owing to be movable sealing, also is the position that relatively easily goes wrong.Leaking appears in the flashboard axis sealing, if untimely processing is leaked and can further be enlarged, the influence safety in production.In the prior art, as the emergency processing measure, when the flashboard axis seal failure, the way of employing is to annotate secondary seal fat, and secondary seal fat viscosity is big, and frictional resistance adheres to sand grains greatly and easily, pulls flashboard axis easily.
Summary of the invention
The purpose of the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of flashboard axis sealing eduction valve is provided, and it is simple in structure, and result of use is good, and safety is greatly enhanced.
For reaching above-mentioned purpose, the utility model is taked following technical scheme: the utility model includes: side door, sealing ring, spool, valve rod, valve body, valve seat.Wherein spool, valve rod, valve seat are installed on the inside of valve body, and valve body is fixedly connected on the bottom of side door, and its position is between two groups of sealings of side door.
The utility model is taked technique scheme, has following beneficial effect: the utility model is in normally open at ordinary times, can make a backup seal of flashboard axis seal group be in the not state of pressurized.When flashboard axis primary seal place takes place to leak, can observe by eduction valve, close eduction valve this moment, can enable backup seal and participate in sealing.Be equivalent to increase a cover safety device.Can avoid using secondary seal fat, secondary seal is as alternative scheme.The utility model safety is strengthened, and being equivalent to has increased by a cover backup seal in flashboard axis sealing place.Can avoid using secondary seal fat, secondary seal fat only uses under the situation that the sealing of second road was also lost efficacy as far as possible, and the probability of this situation is very little.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in detail.
Fig. 1 is the utility model structure diagram.
Mark among the figure: 1-side door, 2-sealing ring, 3-spool, 4-valve rod, 5-valve body, 6-valve seat
The specific embodiment
By shown in Figure 1, the utility model comprises: side door 1, sealing ring 2, spool 3, valve rod 4, valve body 5, valve seat 6, wherein spool 3, valve rod 4, valve seat 6 are installed on the inside of valve body 4, and valve body 4 is fixedly connected on the bottom of side door 1, and its position is between two groups of sealings of side door 1.
Under the preventer normal operating conditions, eduction valve is the stand-by state that is in unlatching, and when the seal failure of the preceding road of the flashboard axis of preventer, medium can at first be leaked by the eduction valve place, can be from visual observation to this leakage situation.When taking place to leak, can close eduction valve.After closing eduction valve, make to be positioned at the sealing ring that is in stand-by state behind the eduction valve at ordinary times and to participate in sealing and play a role.
Claims (1)
1, a kind of flashboard axis sealing eduction valve, it is characterized in that it includes: side door (1), sealing ring (2), spool (3), valve rod (4), valve body (5), valve seat (6), wherein spool (3), valve rod (4), valve seat (6) are installed on the inside of valve body (4), and valve body (4) is fixedly connected on the bottom of side door (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200742105U CN201170079Y (en) | 2008-03-26 | 2008-03-26 | Shutter shaft seal flow leakage valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200742105U CN201170079Y (en) | 2008-03-26 | 2008-03-26 | Shutter shaft seal flow leakage valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170079Y true CN201170079Y (en) | 2008-12-24 |
Family
ID=40209132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200742105U Expired - Fee Related CN201170079Y (en) | 2008-03-26 | 2008-03-26 | Shutter shaft seal flow leakage valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170079Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879083B (en) * | 2015-04-30 | 2017-10-31 | 顾军锋 | The leakage observation of preventer and sealing device |
-
2008
- 2008-03-26 CN CNU2008200742105U patent/CN201170079Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879083B (en) * | 2015-04-30 | 2017-10-31 | 顾军锋 | The leakage observation of preventer and sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 |