RU171725U1 - LIQUID SAMPLING DEVICE - Google Patents

Abstract

The utility model relates to devices for sampling liquid media from pipeline systems and can be used, for example, in industries operating engineering products with fuel, oil, hydraulic power and other liquid systems to determine the contamination of their working cavities, to monitor the technical condition of their units and etc. A device for sampling a liquid contains a sampling device with a sampling fitting with a tap for draining the sample and a bypass section built into a controlled bone system. The device is equipped with a system for alternately cutting off the fluid flow in them, made in the form of two three-way ball valves with a common control system. The sampling section of the device is equipped with an inlet fitting with a tap. Using the utility model allows to increase the representativeness of the fluid sample taken and to prevent an erroneous assessment of the level of contamination of the working fluid and the technical condition of the controlled fluid system and its units. 2 ill.

Description

The utility model relates to devices for sampling liquid media from pipeline systems and can be used, for example, in industries operating engineering products with fuel, oil, hydraulic power and other liquid systems to determine the contamination of their working cavities, to monitor the technical condition of their units and etc.

Known full-flow sampling devices that implement the method of isokinetic sampling of liquids with full coverage of the cross section of the fluid flow, increasing the representativeness of the sample.

The closest to the proposed utility model for its intended purpose and common essential features is the Potok-1 sampling device (RF patent No. 40391; IPC Е21В 49/08, F17D 3/10; 2004).

The prototype has the form of a looping, each section of which can pass through itself the entire flow of liquid. Sections are alternately cut off from the main pipeline by a system made of two three-way ball valves (gate valves), which are controlled simultaneously by fastening their rods to one shaft having a control lever. By changing the control lever, one section (bypass) is alternately opened and another is cut off from the main pipeline (sampling). The sampling section is equipped with a fitting with a valve for draining the cut-off liquid sample.

The most important component of the analytical control of any object is the selection of a representative sample of the control object, which in terms of composition, properties or structure is taken to be identical to the analytical control object from which it is selected. In this case, the sampling error to ensure the quality of the analysis should be minimized (items 1, 2, 7-10, 46-48 GOST R 52361-2005).

The disadvantage of the prototype is that it does not provide sufficient representativeness of the sample fluid in terms of its contamination by mechanical pollution for the following reasons:

- in the sampling mode (the bypass section is open, the sampling is closed), mechanical fractions of liquid contaminants are deposited on the walls of the sampling section, which do not fall into the sample fused for analysis, which distorts its representativeness;

- in the operating mode (the sampling section is open, the bypass is closed) there is an accumulation on the walls of the sampling section of additional contaminants coming from the working system, which, when taking the sample, also leads to a violation of its representativeness.

These shortcomings lead to an erroneous assessment of the state of industrial cleanliness of the working fluids and the systems themselves and to an unreliable assessment of the technical condition of the units included in the design of these systems.

The technical result of the utility model is to increase the representativeness of the sampled fluid.

The technical result is achieved by the fact that in the known sampling device comprising a sampling device with a sampling fitting and a valve for draining the sample, and bypass sections built into a controlled fluid system equipped with a system for alternately cutting off the fluid flow in them, made in the form of two three-way ball valves with a common control system, the sampling section is equipped with an inlet fitting with a tap.

The essence of the claimed utility model is as follows:

After sampling the liquid through an additional inlet fitting into the internal cavity of the sampling section, a deliberately clean working fluid of the controlled fluid system is pumped with draining it through a sampling fitting into a container with a sample taken. This provides a flush from the inner walls of the sampling section of mechanical impurities falling out of the cut off fluid flow into the selected sample. The walls are washed off and the contaminants are removed to the sample container using any of the known effective washing methods, for example, with the organization of an unsteady fluid flow in the cavity of the sampling section, or with pulse injection under excessive pressure of the gaseous medium (Belyanin P.N., Danilov V.M. Industrial Purity of Machines. - M.: Mechanical Engineering, 1982. - 224 pp. Pp. 104-142). In addition, an additional inlet fitting with a sampling section valve is used to periodically flush the sampling section to remove contaminants, the accumulation of which is possible during the operation of the controlled system. In this way, the technical result declared in the utility model is achieved - increasing the representativeness of the sampled liquid

The utility model is illustrated by illustrations, where

in FIG. 1 is a drawing of the proposed device for sampling fluid samples in the mode of operation of a controlled fluid system;

in FIG. 2 is a drawing of the proposed device in sampling mode.

In the drawings indicated:

1 - sampling section;

2 - selective fitting of the sampling section;

3 - inlet fitting of the sampling section;

4 - taps of select and inlet fittings;

5 - bypass section;

6 - controlled fluid system;

7 - three-way ball valves.

Arrows indicate the direction of fluid flow.

A device for sampling liquid contains a sampling section 1 equipped with a selective 2 and input 3 fittings with taps 4; bypass section 5 and a system for alternately cutting off the fluid flow in sampling 1 and bypass 5 sections from the controlled fluid system 6, consisting of two three-way ball valves 7 with a common control system (not shown in the drawings). The inlet fitting 3 with a tap 4 is designed to fill the obviously clean working fluid of the controlled system 6 of the cavity of the sampling section 1 in the "sampling" mode.

The device operates as follows:

In operating mode (Fig. 1), the device operates similarly to the prototype.

Sampling is performed similarly to the prototype with differences, which are as follows.

In the sampling mode (Fig. 2) through the sampling nozzle 2 with a valve 4, to prevent the creation of rarefaction in the internal cavity of the sampling section 1, which impedes the flow of liquid, open the valve 4 of the additional inlet nozzle 3, which intensifies the removal process of the mechanical sample located in the cavity of the sampling section 1 pollutant.

After sampling through the inlet 3, the cavity of the sampling section 1 is filled with a knownly clean working fluid of the controlled system 6 (from an external source, not shown in the drawings) and poured into the selected sample through a sampling nozzle 2, using well-known methods to intensify the washing process of internal cavities. Also, fittings 3 and 2 with taps 4 are used to periodically flush the internal cavity of the sampling section 1 from the contaminant accumulated during operation of the device in operating mode.

Thus, the use of a utility model makes it possible to increase the representativeness of the fluid sample taken and to prevent an erroneous assessment of the level of contamination of the working fluid and the technical condition of the controlled fluid system and its units.

Claims (1)

A liquid sampling device comprising a sampling device with a sampling nozzle with a sample drain cock and a bypass section integrated in a controlled liquid system equipped with a system for alternately cutting off the liquid flow in them, made in the form of two three-way ball valves with a common control system, characterized in that the sampling section is equipped with an inlet fitting with a tap.

Images