RU1770808C - Automatic-sampler - Google Patents

Description

1

{21) 4870235/05 (22) 03/15/90 (46) 10/23/92. Vul. No. 39 (71) 01p Prk-Ch 1st branch of the Armed Forces of Ukraine on ozno1 0 research-and-research of the Gepy and gouging stations of the construction industry of complex automation of the oil and gas industry

(72) A.F. K .ac3KOj and B, A. Burhapo (5G) USSR Copyright Certificate No. 275250, G 01 N 1/10, 1985.

AB & opCi or - certificate of the USSR 6341UO. class G 01 N 1/10, 1975. (54) AUTOMATIC SAMPLE

(57) Usage: technique for automatic sampling from pipelines. CyiuHoosb Mzobre: vgsh: co2 sampler

holds a housing in which an electromagnetic coil with a spring-loaded core that serves as a spool for the upper and lower valves is placed. A piston is attached to the core by means of a rod. The outside diameter of the piston is wounded by the inside diameters of the valve seats. The dispenser was able to communicate with the storage cylinder, and sampling tubes were connected to the housing via connecting tubes. The podsorshy cavity communicates with the intake pipes, for example, through a radial channel and a connecting pipe made in the housing, and the nedporshne cavity communicates with a storage cylinder, for example, through a longitudinal channel made in the housing wall, 1 il.

The invention relates to a technique for automatically withdrawing fluid from a pipeline.

A well-known fighter is known, in the barrel of which a piston is placed, during the reciprocating movement of which with the help of an electric drive the pumping of PRS liquid from the intake probe into the container is carried out.

The drawback of the sampler is the complexity of manufacture and the low uptime resource due to the presence of an electric motor with a gearbox and a stepless mechanism with a large number of moving parts.

A known sampler comprising a housing with an electromagnetic valve communicating a dispenser with a cylinder.

The drawback of the sampler is the imbalance of the spool of the solenoid valve from the forces of the differential pressure between the pipeline and the cylinder. This requires an increase in the pressure force of the seals with increasing pressure in the pipeline or the diameter of the valve cross sections and, as a result, an increase in the power of the electromagnet, and hence an increase in material consumption, energy consumption and overall dimensions.

The aim of the invention is to increase the reliability of operation when the pressure in the pipeline changes.

The drawing shows a General view of the automatic prebsotborp-ke.

The automatic sampler consists of a VIT of housing 1, in which the electromagnetic coil 2 is p-placed. The core 4, preloaded by spring 3, with mechanical seals m1 / 5 and 6, connected to the piston 7, is inserted into the coil 2

fc3C3 &

X |

eafazclt

The external damef of the piston 7 is tapered with an inner diameter of the seats 8 and 9. Through the channels 10, 11 and 12, the cavity of the chamber 13 communicates respectively with the standard cylinder 14, the metering unit Go and the sampling tubes 16.

The rod 17 connecting the piston 7 to the core 4 has a diameter smaller than that of the piston 7, Podporshne’s buoy 18 and supra-piston 19 of the cavity through channels 10 and 20 are in constant communication respectively with cylinder 14 and sampling holes 16 which are installed by nonociM rpv6on- the wire 21. The piston 7 is installed p additional chamber 22 of the housing 1

The device operates as follows,

In the initial (according to the drawing) position to the mash 15 through channels 11 and 10, a i3ivc the gap between the stem 17 and the seat 8 is in communication with the cylinder 14 (having atmospheric pressure). The same pressure from the pipe 21 is suitable for the barrel of the seat 9 and the under-cavity 18.

Since the cross-sectional areas are sealed, sealed by the piston 7 and the core 4 at the end (act with the saddle 9, as well as the pressure values acting on these areas are equal but opposite, the forces arising from the pressure drop across the core from the piston 7 side and saddles 9 are mutually balanced.

When the power supply of coil 2 is turned on, the core 4, moving downward, closes the seat 0 and opens the seat 9. The medium through the SRD / O 9 enters the chamber 13 and fills the dispenser 15 through the channel 11. Since the cross-sectional areas are covered by the piston 7 and when in contact with the saddle 8 as well as the core 4, the pressure values equal to 3iH of the area arising from the pressure drop across the core 4 from the sides of the end face 7 and the seat 9 are equal, but oppositely directed.

When turning off the power supply to the carcass 2, the core 4 COBMGCI but with the piston 7, the spring 3 returns to its original position.

In this case, the working medium from the dispenser 15 through the channel 11, the annular gap between the rod 17 and the seat 8, as well as the channel 10 is expelled into the container 14.

When turning on and off the power supply of coil 2, the cycle of transferring samples from the pipeline 21 to the dispenser 15, and then from the dispenser 15 to the cylinder 14 is repeated.

In order to seal the seats 8 and 9 tightly, the contact stress in the face of eyes 5 and 6 must exceed the pressure drop. The size of the contact area of the seats 8 (or 9) with the seals 5 (or 6) is proportional to the diameter of the effective section of the seats 8, and the size of the area on which the force exerted by the pressure is quadratic depends on the diameter of the passage section of the seat 8.

That is, the force of the electromagnet necessary to move and press the core with a certain force to the seat is proportional to the diameter of the seats for the pressure-balanced core, and for the unbalanced prototype core

5, the force of the electromagnet is cubic depending on the diameter.

Thus, the balancing of the core provides the minimum impact force of the core on the saddle when it is switched 0 Czech, regardless of the pressure, and therefore increases the durability of the seals and hence the reliability of the sampler

In addition, in the claimed sampling5, balancing the core against pressure forces allows

h, 1 increase the pressure at the same time as the boiling point of the seat diameter and the force of the special magnet - which will increase

0 pressure range in the pipeline on which the sampler can be installed,

-or increase the diameter of the saddles at the same pressure and force as the electromagnet — then it is possible to increase the viscosity range of the fluid being drawn;

Claims (1)

-or reduce the force of the electromagnet at the same pressure and diameter of the seats as the prototype, which will lead to a reduction in metal and energy consumption. SUMMARY OF THE INVENTION An automatic sampler comprising a housing with a flange in its lower part, an electromagnetic valve, 5, the spring-loaded core of which is made in the form of a spool with mechanical seals that intersect the valve seats of the sampler, and an accumulation cylinder, characterized in that 0 in order to increase the reliability in operation when the pressure in the pipeline changes, the sampler is made with a vertical channel in its upper part, equipped with sampling tubes, and the cylinder is placed 5 in the lower part of the sampler, the flange is made in the form of an additional body with a radial channel, equipped with a spring-loaded piston and a rod fixed inside it, rigidly connected to the spring-loaded core, while the supra-part of the additional body is connected to the cylinder through a vertical channel, the sub-part of the additional body is connected to sampling tubes through the radial channel, and the spring-loaded piston is made with a diameter equal to the diameters of 5 valve seats of the sampler.