SU1765749A1 - Sampler - Google Patents

Abstract

The invention can be used for sampling liquids with a destructive structure. The purpose of the invention is to provide the possibility of sampling a liquid with an easily destructive structure by eliminating the effect of pressure drop. The goal is achieved by the fact that the piston is provided with a hole and a bracket with a threaded connection with the rod, and the latter is designed as a shut-off valve. 1 hp f-ly, 1 ill.

Description

This invention relates to a device for sampling a pressurized liquid from an apparatus or a pipeline, in particular for sampling a liquid with an easily destructive structure.

A known sampler for the collection of pressurized liquids, comprising a housing with a stem and a gland.

The disadvantage is the low quality of the sample taken from the easily degraded liquid.

The closest in technical essence and the achieved result is a depth sampler, comprising a housing divided by a partition with an opening into a sampling chamber with a separating sealed piston, an inlet opening with a controllable valve and a ballast chamber with an exhaust opening, the opening of the partition with the possibility of axial movement, a rod with a return spring and a spring-loaded rod in the end part placed in the ballast to least an outlet which is sealed by a stopper to communicate with the external environment by reacting the spring-loaded rod with a stopper, the return spring force of the compression rod is equal or greater than the frictional force of the separating piston seals against the walls of the receiving chamber.

The disadvantage is the low quality of the fluid sample with an easily destructible structure, for example, a polyacrylomide solution, since the sampler is not flowable and the first portions of the fluid will be destructed when flowing into the sampling chamber under the action of the pressure difference inside and outside the sampler.

The purpose of the invention is to provide the possibility of sampling a liquid with an easily destructive structure, by eliminating the effect of pressure drop.

The goal is achieved by the fact that the piston is provided with a bracket with a threaded connection for interacting with

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rod, made in the form of a check valve, and the piston is equipped with protrusions aligned with the depressions made in the end part of the housing, with the extreme position of the piston.

Such a technical solution substantially surpasses the quality of a sample of an easily destructible fluid, which is currently used in hollow samplers. The latter have an imperfect fluid displacement regime and require long flushing, which, taking into account the presence of low sampling rates, significantly increases the sampling time and, moreover, it does not guarantee against errors, since accumulation and filtration of the underexposed polymer often occurs. in the sampler, which also reduces the quality of the sample.

The drawing shows the proposed sampler, a General view.

The sampler consists of a housing 1, inside of which is a sealed piston 2 with a hole 3, a bracket 4 and lugs 5. The rod b is designed as a shut-off valve 7 and is equipped with a gland 8. The end cover of the receiving chamber 9 is equipped with a valve 10 and troughs 11. End the ballast chamber cover 12 is equipped with a valve 13. The bracket 4 has a threaded connection with the rod 6, in addition, the latter is equipped with a steering wheel 14.

The sampler works as follows.

By rotating the handwheel 14, the piston 2 is pushed to the extreme position with the help of the rod 6 with the minimum volume of the receiving chamber, while the rods 6 rotate the protrusions 5 to fall into the depressions 11. The sampler is screwed onto the high pressure fitting. By turning the stem 6, the orifice 3 in the piston 2 opens. The full valve on the high pressure choke and the valve 10 open. The working fluid, including its first degraded portions, flows through the orifice 3, into the ballast chamber. After it is filled with the help of the valve 13, a stationary regime of liquid withdrawal is established at a given speed. After that, turn

the rod 6 closes the opening 3 in the piston 2 and begins to fill the receiving chamber with the working fluid, which is fixed by moving the piston 2 and the rod 6. After filling the working chamber, the valve 10 and the valve on the high pressure fitting are closed, the sampler turns off, turns over and is discharged into the atmosphere through the valve 10 is discharged the overpressure, then the valve 10 opens completely and the contents of the receiving chamber is poured into the dishes by moving the rod b and the piston 2. The contents of the ballast chamber can be used for after following sampling.

In comparison with the prototype, as No. 1167313, the proposed technical solution allows to prevent the first portions of the liquid destroyed by the pressure differential from entering the receiving chamber, as it flows into the ballast chamber. Improving the quality of the sampled fluid is provided by taking fluid into the receiving chamber at a steady-state filling mode with a minimum pressure difference in the sampler and in the high-pressure choke.

The use of the proposed invention completely eliminates the aforementioned drawbacks of the known samplers.

Claims (2)

1. A sampler comprising a housing with a sealed piston with a rod located therein, a receiving chamber with an inlet valve and a ballast chamber with an exhaust valve, characterized in that, in order to enable the sampling of a fluid with a destructive structure by eliminating the effect of pressure drop, the piston provided with a bracket with a threaded connection for engagement with the stem, made in the form of a check valve. 2. The sampler of claim 1, wherein the piston is provided with projections aligned with depressions made in the end part of the housing, with the piston at the extreme position. //