CN201225965Y

CN201225965Y - Gas control type groundwater constant depth sampler

Info

Publication number: CN201225965Y
Application number: CNU2008201090575U
Authority: CN
Inventors: 郑继天; 王建增; 叶成明
Original assignee: Center for Hydrogeology and Environmental Geology CGS
Current assignee: Center for Hydrogeology and Environmental Geology CGS
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-04-22
Anticipated expiration: 2018-07-04

Abstract

The utility model relates to an air-control underground-water fixed-depth sampling instrument, which consists of a sampler and an air charging device, wherein, the sampler consists of an air-control opening-closing valve unit and a specimen accommodating pipe; the specimen accommodating pipe is communicated with the inlet of the specimen and is provided with a specimen discharging valve; the air charging device comprises an air source, an air inlet valve, an air discharging valve, an air inlet pipe and an air discharging pipe. The opening-closing valve unit comprises an opening-closing valve body; an air inlet is arranged at the head side of the opening-closing valve body; at least one side of the opening-closing valve body is provided with a specimen inlet; an opening-closing valve core that can be controlled to move from up to down is arranged inside the cavity of the valve body; the cavity of the valve body is communicated with the specimen accommodating pipe; a sealing plate with a middle opening is arranged between the cavity and the specimen accommodating pipe; the opening-closing valve core consists of a valve core sliding body and a piston combination body at the head end, and can respectively close the air inlet and the opening of the sealing plate. The sampling instrument can collect the representative underground water specimen below the floated oil and other substance layer, and can collect the underground water specimen containing the volatile organic matter, and can collect the underground water specimen at any depth within the determined range.

Description

The Pneumatic-control type ground water fixed depth sampler

Technical field

The utility model relates to a kind of Pneumatic-control type ground water fixed depth sampler.

Background technology

In the groundwater contamination investigation work, the general at present common sampler such as sampling bottle, sampling cylinder of using is gathered the underground water sample.Because common sampler such as sampling bottle, sampling cylinder belong to the open type sampler, can not gather the underground water sample that contains volatile organic matter, can not in wellhole, exist and gather representational sample under the situation of floating thing (especially petroleum-type), therefore, be unwell to collection groundwater contamination sample and special study of groundwater sample.

Summary of the invention

The purpose of this utility model provides a kind of Pneumatic-control type ground water fixed depth sampler, the underground water sample of gathering set depth in wellhole that it can be easily and effectively.

For achieving the above object, the utility model is taked following design proposal:

A kind of Pneumatic-control type ground water fixed depth sampler, it is constituted by sampler, aerating device; Described sampler is made of the Pneumatic-control type keying valve cell and the connection of sample containing pipe of control sample inlet, and sample containing pipe and sample inlet UNICOM also have the sample bleed valve on its pipe; Described aerating device includes inflation source, intake and exhaust valve and intake and exhaust pipeline, and a port of intake and exhaust pipeline is connected to the control mouth end of intake and exhaust valve, and the another port is connected to the air intake opening that Pneumatic-control type opens and closes valve cell.

Described keying valve cell comprises that one opens and closes valve body, on a side that opens and closes valve body, drive gas port into, at least on an avris that opens and closes valve body, open sample inlet, be equipped with the control keying valve core moving up and down of being bullied in the body cavity, body cavity and sample containing pipe UNICOM, the upright between the two seal pad that perforate in is arranged, open and close valve core and constitute by the piston of spool gliding mass and upper and lower end is conjuncted, this upper and lower piston can when rising to the top and coming downwards to terminal, seal respectively air intake opening and seal pad perforate.

The utility model Pneumatic-control type ground water fixed depth sampler can solve existing common sampler and gather the problem that the underground water sample exists.

The utility model has the advantages that: serviceability is superior, can gather representational underground water sample under floating oil and other material layers; Can gather the underground water sample that contains volatile organic matter; And can in the scope that the utility model is set, gather the underground water sample of any degree of depth.

Description of drawings

Fig. 1 is the utility model Pneumatic-control type ground water fixed depth sampler structure synoptic diagram

Fig. 2 is the utility model sampler structure synoptic diagram

Below in conjunction with drawings and the specific embodiments the utility model is described in further details:

Embodiment

Consult Fig. 1 to shown in Figure 2, the utility model Pneumatic-control type ground water fixed depth sampler is constituted by sampler 100, aerating device 200.

Referring to Fig. 2, described sampler 100 opens and closes valve cell by Pneumatic-control type and 18 connections of sample containing pipe constitute.Open and close valve cell and comprise that one opens and closes valve body 12, on a side that opens and closes valve body 12, drive gas port 11 into, open on an avris that opens and closes valve body at least that to open sample inlet simultaneously on sample inlet 15, two avris better; Be equipped with in the body cavity and open and close valve core 14, it can be moved up and down by gas control, body cavity and sample containing pipe UNICOM, the upright between the two seal pad 17 that perforate in is arranged, open and close valve core and constitute by the piston of middle part spool gliding mass and upper and lower end is conjuncted that (define by user mode: connecing the aerating device end is the upper end, another head end is the lower end), this upper and lower piston can when rising to the top and coming downwards to terminal, seal respectively air intake opening 11 and seal pad perforate 171.Also have sample bleed valve 19 on the sample containing pipe.Respectively be with O-ring seal 13 and 16 (can be " O " RunddichtringO) at keying valve core gliding mass and each piston junction.On keying valve core gliding mass, also can be with O-ring seal.

Referring to Fig. 1, described aerating device 200 includes inflation source 22, intake and exhaust valve 23 and inflation line 21, and a port of intake and exhaust pipeline 25 is connected to the control mouth end of intake and exhaust valve 23, and the another port is connected to the air intake opening 11 that Pneumatic-control type opens and closes valve cell.Inflation line 21, intake and exhaust pipeline 25 can adopt the nylon inflation line, and is promptly soft wear-resisting again, corrosion-resistant, easy to use.As inflation source with survey on-the-spot far or consider that well is darker, can add pipeline spool 24, be used for volume and put exhaust line 25 into.

The principle of work of the utility model Pneumatic-control type ground water fixed depth sampler: open and close valve core and be subjected to sliding up and down after the external force, compress upper and lower O-ring seal, realize that sampler opens and closes closing and opening of valve.Before sampler 100 is lowered to wellhole, from 25 pairs of sampler inflations of intake and exhaust pipeline, keying valve in the sampler cuts out, sampler is before being lowered to wellhole and not reaching set depth, keep certain charge pressure in the intake and exhaust pipeline 25 always, keying valve in the sampler (piston that promptly opens and closes valve core seal seal pad perforate 171) also is in closed condition always, and the water in the wellhole can not enter in the sampler.After reaching the sampling depth that needs, discharge the gas in the exhaust line 25, keying valve under the effect of wellhole water column pressure in the sampler is opened (being sample inlet 15 and seal pad perforate 171 and sample containing pipe mutual conduction), and the water of resample area enters in the sampler.After treating that sampler is full of water, will open and close valve from inflation line to sampler inflation again and close, and make sample retention in an airtight container, then mention the face of land, and be transported to testing laboratory and chemically examine.

The course of work of the utility model Pneumatic-control type ground water fixed depth sampler: before the sampling, keep the normal pressure air-tight state in the sample containing pipe.Sampler was inflated by nylon inflation line 21 before entering wellhole, and gas enters the keying valve, and keying valve core 14 is descending under the gaseous tension effect, and the lower seal 16 on spool is compressed.Close sample bleed valve 19, make sample containing pipe 18 become airtight cavity.Then, the depthkeeping sampler is put into wellhole.Because sample containing pipe 18 is airtight cavity, so when the depthkeeping sampler was put into wellhole, floating oil and other materials of existing in the wellhole can not enter sampler.After waiting to reach the degree of depth of setting, discharge gas by inflation line 21, at this moment open and close valve core 14 and no longer bear gaseous tension, water around the depthkeeping sampler enters the keying valve by water inlet 15, under the hydrostatic force effect, make to open and close on the spool 14 and move, open the circular hole on the seal pad 17, water slowly flows into sample containing pipe 18.Open and close simultaneously on the valve core 14 and move, the air intake opening circular hole 11 that opens and closes on the valve body 12 is blocked, enter pipeline, just needn't clean when descending sub-sampling like this pipeline to prevent water.By the time after water is full of sample containing pipe 18 (about 1 minute), inflate by inflation line 21, depress and open and close valve core 14, block the circular hole on the seal pad 17, make sample containing pipe 18 become airtight cavity once more, descend the volatile organic matter in the water sample just can completely to preserve in this wise.After being transported to testing laboratory, opening sample bleed valve 19 and take out sample.

The foregoing description can not break away under the scope of the present utility model in addition some variations, thus above explanation comprises and accompanying drawing shown in structure should be considered as exemplary, but not in order to limit claim of the present utility model.

Claims

1, a kind of Pneumatic-control type ground water fixed depth sampler, it is characterized in that: it is constituted by sampler, aerating device;

Described sampler is made of the Pneumatic-control type keying valve cell and the connection of sample containing pipe of control sample inlet, and sample containing pipe and sample inlet UNICOM also have the sample bleed valve on its pipe;

Described aerating device includes inflation source, intake and exhaust valve and intake and exhaust pipeline, and a port of intake and exhaust pipeline is connected to the control mouth end of intake and exhaust valve, and the another port is connected to the air intake opening that Pneumatic-control type opens and closes valve cell.

2, Pneumatic-control type ground water fixed depth sampler according to claim 1, it is characterized in that: described keying valve cell comprises that one opens and closes valve body, on a side that opens and closes valve body, drive gas port into, at least on an avris that opens and closes valve body, open sample inlet, be equipped with the control keying valve core moving up and down of being bullied in the body cavity, body cavity and sample containing pipe UNICOM, the upright between the two seal pad that perforate in is arranged, open and close valve core by spool gliding mass and last, the conjuncted formation of the piston of lower end is on this, lower piston can when rising to the top and coming downwards to terminal, seal respectively air intake opening and seal pad perforate.

3, Pneumatic-control type ground water fixed depth sampler according to claim 1 is characterized in that: be with O-ring seal at keying valve core gliding mass and each piston junction.