CN102967487A

CN102967487A - Large drift diameter built-in high-pressure sampling valve

Info

Publication number: CN102967487A
Application number: CN2012105026691A
Authority: CN
Inventors: 赵宏宇; 廖波
Original assignee: Yibin Sanjiang Machinery Co Ltd
Current assignee: Yibin Sanjiang Machinery Co Ltd
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2013-03-13
Anticipated expiration: 2032-11-30
Also published as: CN102967487B

Abstract

The invention discloses a large drift diameter built-in high-pressure sampling valve, which comprises a valve body, and is characterized in that a sampling core pipe is arranged in the valve body; an opening and a chute are formed on an upper wall of the valve body; the opening is communicated with the chute; the large drift diameter built-in high-pressure sampling valve is provided with a sealing sliding plate; an outline of the sealing sliding plate is matched with the shape of the opening; a sealing edge of the sealing sliding plate is a curved surface; small shafts at two ends of the sealing sliding plate are arranged in the chute and can rotate in the chute; and a sealing valve seat is arranged in the valve body. A special hard sealing structure is utilized, the sea bottom in-situ airtight sample core sampling equipment has excellent sealing characteristics under the seawater of 3,000 meters, sealing operation can be performed in the process of sampling, pollution-free and leakage-free acquisition of the sample core is realized, and the required original state and information of the sample taken from the sea bottom is guaranteed during a lab test, so that a real testing result is acquired; and in addition, extra complicated design is avoided, and the large drift diameter built-in high-pressure sampling valve has the advantages that the power supply is not required, the action is stable and reliable, and the sealing effect is good.

Description

Large latus rectum internal high-voltage sample valve

Technical field

The present invention relates to a kind of sea boring and get the large latus rectum internal high-voltage sample valve that core uses, be particularly useful in the original position boring with sampling equipment of seabed, implement the pollution-free collection of seabed original position core, belong to the design and manufacturing technology field of the probing harvester of sea bed gas hydrate and marine oil and gas investigation sample.

Background technology:

The in-situ acquisition of marine bottom sediment, rock core and analysis in situ, but CH in the quick detection sample ₄, H ₂Gas and the Cl such as S ^-, SO ₄ ^2-Isoionic unusual and distribution characteristics, detecting for gas hydrate and hydrocarbon resources provides fast and efficiently GEOCHEMICAL EVIDENCE.But existing oceanic sediment acquisition technique mainly is with after the gravity piston collection sediment, carry out the extraction of pore water in the laboratory by some means such as squeezing, centrifugal and vacuum filtration extractings again, these methods are all carried out under conventional environment, in the process of carrying out centrifugal treating or vacuum filtration, can cause the dissolved gas in the pore water to be escaped or disappearance, therefore primitive component and the information of pore water can not be accurately reflected, and the in-situ acquisition of rock core can not be realized.We are devoted to develop in-situ acquisition sediment, the core sample of marine bottom sediment, rock core by continuous effort, and can protect the sample devices of gas.This will be described in following length.

Summary of the invention:

The present invention be directed to that large latus rectum internal high-voltage sample valve sealing in the in-situ acquisition sealing sample devices of present marine bottom sediment, rock core keeps and from the problem of seabed opening high pressure sample core valve, adopt the mode of autoshutdown in hard sealing, the drill bushing, disclose a kind of large latus rectum internal high-voltage sample valve of original position probing sealing sample devices that can be used for to remedy the deficiency of prior art.

The present invention is achieved in that large latus rectum internal high-voltage sample valve, comprises valve body, it is characterized in that: sampling core pipe is arranged in the valve body; Opening and chute are arranged on the valve body upper wall, and opening and chute communicate; Be provided with drop bar, drop bar outline and the shape of opening adapt to, the sealing of drop bar is along be curved surface, the little axle at drop bar two ends is installed in the chute and also can rotates in chute; Be provided with seal valve seat in the valve body, the sealing of seal valve seat along for curved surface and and the sealing of drop bar adapt along curved surface.

Optimize, the section between the pass close point of chute and the breakthrough point is vertical section.

Optimize, between valve body and seal valve seat, be provided with O-ring seal.

Beneficial effect of the present invention is: the present invention utilizes the design of the large latus rectum internal high-voltage of special hard sealing structure sample valve, under 3000 meters seawater, can make the airtight sample core of seabed original position sample devices have good sealing characteristics, when sample drawn, can carry out seal operation, pollution-free, the nothing that have realized the airtight sample core of original position are leaked collection, guarantee virgin state and information that the sample fetched from the seabed needs when laboratory examination, thereby obtained true satisfied test findings; The present invention can be applicable to investigation and exploitation and the underwater environment monitoring etc. of sea bed gas hydrate and marine oil and gas resource etc., can be used for investigation and exploitation and the underground environment monitoring etc. of land hydrocarbon resources and gas hydrate etc., had broad application prospects.In addition, the present invention does not have extra loaded down with trivial details design, has the power supply of need not, and having stable behavior is reliable, the advantage of good sealing effect.

Description of drawings

Fig. 1 is structural representation of the present invention.

Fig. 2 is the schematic perspective view of valve body.

Fig. 3 is the schematic perspective view of drop bar.

Fig. 4 is the schematic perspective view of seal valve seat.

Fig. 5 is the schematic perspective view of sampling core pipe.

Fig. 6 is three-dimensional assembly structure synoptic diagram.

Embodiment

Embodiment:

The present invention packs into and is connected in the original position drilling equipment drill bushing of seabed, and it is concrete 1 that namely valve body 2 is positioned at the drill bushing sampleman, and O-ring seal 8 is arranged between the two.When the original position: seal valve seat 3 is sleeved in the valve body 2, and O-ring seal 7 is arranged between the two.Drop bar 6 is installed in the valve body 2 from opening 10, and the little axle 5 at its two ends is in the position that the breakthrough point C in the chute 11 is ordered.Then in valve body 2, seal valve seat 3 and the drop bar 6 common spaces that form sampling core pipe 4 is housed.

In the present invention, drop bar 6 is parts of a most critical, and what it played is the effect of closing and connecting, and is a switch block.In above-mentioned initial state, drop bar 6 is in an edge-on state, and purpose is vacating space, in order to sampling core pipe 4, i.e. breakthrough status are installed.Simultaneously, sampling core pipe 4 also forces drop bar 6 to keep this state.

During use, a whole set of parts and peripheral unit are inserted in the subdrilling well, get into the floor of taking a sample under 3000 meters seawater and make original position airtight sample core in seabed enter sampling sample storage chamber by the passages in the sampling core pipe 4.

After collection sample core is finished, upwards extract sample core pipe 4, after sampling core pipe extracts, drop bar 6 does not have the effect of external force, under action of gravitation, little axle slides into the position that the pass close point D in the chute 11 is ordered for 5 times, simultaneously, drop bar 6 meeting 90-degree rotations are in horizontal state, in sliding process, curved surface 12 meetings on the drop bar 6 and the curved surface 13 on the seal valve seat 3 cooperate fully, until fit like a glove, have realized closing of valve, make the sample core in the upper space be in state of isolation, reached the purpose of pressurize.

What particularly point out is: among the present invention, hard sealing structure by between seal valve seat 3 and the drop bar 6 by Precision Machining curved surface and the grinding moulding that cooperatively interacts; Curved surface between seal valve seat 3 and the drop bar 6 can be realized large latus rectum function, is better than ball valve, the plate valve latus rectum of existing all like products.

Claims

1. large latus rectum internal high-voltage sample valve comprises valve body, it is characterized in that: sampling core pipe is arranged in the valve body; Opening and chute are arranged on the valve body upper wall, and opening and chute communicate; Be provided with drop bar, drop bar outline and the shape of opening adapt to, the sealing of drop bar is along be curved surface, the little axle at drop bar two ends is installed in the chute and also can rotates in chute; Be provided with seal valve seat in the valve body, the sealing of seal valve seat along for curved surface and and the sealing of drop bar adapt along curved surface.

2. large latus rectum internal high-voltage sample valve as claimed in claim 1 is characterized in that: the section between the pass close point of chute and the breakthrough point is vertical section.

3. large latus rectum internal high-voltage sample valve as claimed in claim 1 is characterized in that: be provided with O-ring seal between valve body and seal valve seat.