SU541978A1 - Sampling device - Google Patents

Description

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The invention relates to oceanology and may find application in studies of the aquatic environment of the seas and oceans, conducted in particular for the purpose of exploring oil fields.

Sampling devices are known that contain a working chamber, a housing with lids, a mechanism for locking the lids mounted on the housing, pressure equalization and a drain valve.

A disadvantage of the known devices is the low degree of reliability of sampling due to the fact that the delivery of a sample for analysis, including raising the sample from the depth to the surface, storing it and submitting it for analysis, is accompanied by a significant change in the qualitative and quantitative composition of the sample, in particular, when raising the sampling device the pressure equalization unit releases part of the sample from the working cavity. When this happens, the composition of the sample changes.

With long-term storage of the sample taken in the working cavity of the device, changes in ambient temperature also

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pr1sodlt to expulsion to discharge from the working cavity of gases dissolved in water. The sample is fed to the analysis in a known device through a drain valve. A vacuum is created or by draining water at atmospheric pressure, which also leads to a change in the composition of the sample.

The purpose of the invention is to increase the reliability of sampling.

This chain is achieved: the sampling device is equipped with a pressure recovery station, which is installed in the upper membrane and resiliently located in the lower lid of the housing.

In this design of the sampling device, sampling, delivery to the surface, and feeding of the sample for analysis does not change its composition, because the elastic element, which is the pressure equalization unit, produces equilibrium pressure in the working cavity of the device with ambient pressure without dropping the sample from the working cavity, and the unit for restoring pressure allows to carry out the flow of the sample for analysis at that pressure, at which its production is carried out at a depth of

Ma figs, 1 shows cxeivia sampling device with open lids (when submerged under water); in fig. 2 the same, with closed caps, and (when submitting a sample for analysis).

The device includes a cylindrical housing 1 with 3s1 flapping EEs on the ends of covers 2 and 3, which are connected to each other through the mechanism 4 to lock the covers smongroved on the housing 1. Through the same .Mexai-4 a sampling device 1 -... created with the device - to the water supply and lifting to the surface (not shown on the drawings ;. nojiocTE; 5, surrounded by housing 1 and covers 2 and 3, is the working cavity of the sampling device.

On the inner wall: the bottom cover 2 an elastic element is placed, wyzhulenzash in the form of a gerletically secured molded membrane 6, which has a convex spherical shape in the free state and forming with the cover 2 €; ru 7. Chamber 7 -iepes choke 8 is connected with environment JicajomsE. The cover 2 also has a clearance 9,

On the inner side of the top cover 3, there is a restoration point for the pressure point in the working cavity of the device, which includes a thickened membrane: 10, sealed by its base on the cover 3 by means of a flange 11. The membrane is designed as a cap and forms a chamber with the inside wall of the cover 3 12j having a choke 13 for a gas supply; and in the flange 11 there is a ring groove 1 4, where the free part is placed in the lo. of the membrane 10 in an idle state

The device works as follows

In the initial nozhozhenka, before immersion, the mechanism of the under-runner 4 is cocked lids 2 and 3 otkrygty in la membrane 1O is laid in the annular groove 14, the fitting 13 is plugged and the drain valve 9 is closed.

When immersed, the working cavity 5, due to its good visibility at each time instant, is filled with water corresponding to the immersion depth of the device. The position of the molded membrane is not from jviBHHETCH, since the pressures acting on it are from the environment and from the chamber 7 connected to the environment through the throttle 8. The lids 2 and 3 are closed at the sampling point, the water sample compartment is closed. When closing, a dynamic impact of the lids on the fuse occurs. However, it does not cause the deformation of the molded membrane 6 due to the volume; that camera 7 with throttle 8 is a damping. -l link, compensating for a short time IMF.

In case of sub-1; there is a sampling of devices on the surface, the surrounding Dsjulesh: E, and, consequently, the suppression of the working cavity 5, separated from

environmental molded membrane. 6. When reducing the sample sample, p is released: acvoren1l.1X in the water of gases and an increase in the volume of the prog-ib of the molded membrane 6. At the same time, the tightness of the working capacity of the membrane is not disturbed and the emissions from water; Db; The gases are deposited in the working cavity, a portion of its volume, 51, the membrane 6 also detects all the changes in the volume of the sample, calling it & EraI / in terms of the ambient temperature. when long-term storage is not on the ship-building, filled with the sample.

Before serving the sample, the sampling device is placed in a thermal pressure chamber (not shown) with a temperature, different temperature at the sampling point, the valve 9 is connected to the analyzer input device. Through nozzle 13, a compressed gas with a flow rate of P ..., equal to the pressure of the water at the sampling point, is supplied to the chamber 12 of the pressure relief point assembly. “This pressure is maintained in the thermal pressure chamber.” Under the influence of the pressure of P, the free part of the Y membrane is partially expanded, e-1-c, and the membrane (3 bends and presses against the BHJ T-stenchy e carcass 1; and 2 Us1-ro For some time, the temperature is maintained at temperatures of the temperature and pressure that are the same with the values of these parameters at the sampling point, which contributes to the dissolution of the gases and water produced during the ascent and storage of the nervous system of the sample, i.e. states: at the moment of its selection. Further, c; intermittently supplying through the drain valve 9 portions of water from the working cavity 5 for analysis. The portions of the portions are produced at a pressure P, while in a battery and amp; Yu straightens and piles around the chamber 12 knots. When fully emptied, the working post-1 5 in the membrane 10 concerns the inner walls of the working:: n: O: guests 5,