SU1275259A1 - Automatic sampler - Google Patents

Abstract

1. AUTOMATIC SAMPLE, comprising a housing in which a piston with a rod is installed, a probe probe with a collector chamber, installed in a pipeline, a sealed container, an electric drive and a software device, which, in order to increase the reliability and preservation of the quality of the sample, The sampler is equipped with a circulation chamber made with a fluid return channel to the pipeline and a communication channel with a collector chamber, a pressure and temperature compensator, and a collector chamber sample probe is positioned within the probe channel and symmetrically with respect to the sampling points. 2. Sampler pb p. 1, characterized in that the pressure and temperature compensator is made in the form of a sealed con (L С C of a trainer consisting of a stationary cup and a movable cylinder preloaded with an elastic element and provided with a separation piston, a check valve and a return channel fluid in the pipeline.

Description

The invention relates to devices for automatically withdrawing from pressure pipelines an average over the cross section of a sample fluid flow and can be used in quantity accounting and quality control systems for transporting commercial oil and oil products through pipelines.

The purpose of the invention is to increase credibility and preserve the quality of

biraemy samples.

The invention makes it possible to avoid the collection of stagnant fluid, as it is provided for its circulation, to take a sample not under atmospheric pressure, but under the pressure existing in the pipeline, and to compensate for pressure and temperature fluctuations. In addition, in the sampling probe of this sampler, a point sample from all layers through separate channels does not interfere with reciprocal movement — it goes for mixing into the collector chamber, while the sample from the upper and lower layers of the pipeline passes an equal path,

FIG. 1 shows an automatic sampler, a general view, in FIG. 2 is a view A of FIG. one; FIG. Automatic sampler, schematic diagram, FIG. 4 shows a section BB in FIG. one.

The autosampler includes a housing 1 with a flange 2 and a shut-off valve 3, a piston 4 with a rod 5 and a spring-loaded non-return valve 6, a crank mechanism 7, a gearbox 8, an electric motor 9, a sampling probe 10, a sealed container 1I, a microswitch 12 and a software device.

The housing 1 also has a safety valve 13.

The sampling ond 10 is a flat shaped rod with a flange 14, in which the stop valves 15 and 16 and the fitting 17 are installed.

Separate channels 18-22 are made inside the rod, connecting the intake holes to the collector chamber 23, which is located inside the sampling probe symmetrically with respect to the channels and sampling points. The collector chamber 23 is connected by channel 24 to the sampling zone 25 (circulating chamber) in turn, the channel 26 is connected to the outlet openings 27,

The probe is installed by the intake openings facing the flow and with its flange 14 is attached between the flange 2 of the sampling body and the flange of the pipeline.

The container 11 is mounted on the flange 2 of the housing 1 and consists of a movable cylinder 28 and a fixed glass 29. The movable cylinder 28

is a package of lamellar springs. The container has shut-off eerily 31 and 32J spring-loaded non-return valve 33 and a separation piston 34, which separates the container cavity into a sample chamber and a balancing chamber connected by channel 35 to the pipeline through fitting 17. The container 11 also has legs 36, in slot 37 of which is spring 30. Consequently, to compensate for the fluctuating pressure and temperature, a pressure and temperature compensator is provided in which the telescopic container 11 is fitted, equipped with a piston 34, a non-return valve ZZ and a return channel 35 flow into the pipeline.

The tightness of the connection between the movable cylinder 28 and the stationary glass 29 is carried out by sealing rings 38. The glass 29 is rigidly fixed on the flange 2 with a clamp 39. The sampler works as follows.

At the entrance to the intake ports of the probe 10, an area of increased pressure arises due to the flow velocity head, and when flowing around the side surfaces where the outlet holes 27 are located, a region of reduced pressure appears in the holes themselves due to hydrodynamic injection. Due to this pressure difference, sampling takes place in front of the intakes1 and the openings (outer openings of channels 18-22) and outlet openings 27, but this also causes the continuous flow of the sampled fluid around the circuit: sampling into the collector chamber 23, pressure through channel 24 to the extraction zone 25 (circulation chamber), then through channel 26 and through the openings 27 returning the liquid to the pipeline.

Before starting work, valves 3, 15, 16, 31 ,, 32 must be open. The separating piston 34 of the container 1I is located in the extreme lower half of the spring, 3G, which is

S Compiled by V. Rusin Editor N. Margolin Tehred L. Oleinik

6552/32

Circulation 778 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production-printing-enterprise Zone of a business. injectile pressure head / / 10 26 Maximum speed zone offme / faf / uff probe fO 5-6 27 f4 Pipeline (Rig L Corrector M.Sharoshi, Uzhgorod, Proektna str., 4

Claims (2)

1. AUTOMATIC SAMPLER, comprising a housing in which a piston with a rod is installed, a sampling probe with a collector chamber installed in the pipeline, a sealed container, an electric drive and a software device, which, in order to increase the reliability and maintain the quality of the sampled samples, the sampler is equipped with a circulation chamber made with a channel for returning liquid to the pipeline and a communication channel with a collector chamber, a pressure and temperature compensator, and the collector chamber is located ozhena sample probe inside the probe symmetrically relative to the channels and the sampling points. 2. Sampler nbn, 1, characterized in that the pressure and temperature compensator is made in the form of a sealed container consisting of a fixed cup and a movable cylinder, preloaded by an elastic element, and equipped with a separation piston, non-return valve and a channel for returning liquid to the pipeline. SU ,, 1275259