System for automatic feed and circulation of suspensions and solutions in flow measuring cell of analysers


G01N1/10 - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D, B01J, B03, B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M, C12Q; investigation of foundation soil in situE02D0001000000; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N0011000000; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, seeG01D; or the relevant subclass for the variable measuredtesting or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C0005020000; testing component parts of nuclear reactors G21C0017000000)

FIELD: instrumentation.

SUBSTANCE: proposed system comprises intake-and-discharge sealed station equipped with two-way controlled orifice valve arranged at vessel bottom. It includes device for vacuum feed of samples to measuring device. Said device consists of interconnected intake commutator, flow measuring cell connected to vacuum-pressure control system of said intake-and-discharge vessel. Note here that measuring cell comprises bottom inlet-outlet of fluids and is located at top point of sample feed line to rule out the ingress of said products into the meter at breakage of the film and covered by protection film from above. Besides, this system comprises control, indication and data transfer unit including pneumoelectric and electric devices equipped with programmable logical controller and digital processing program. Note here that it incorporates extra intake-and-discharge station coupled with the first one to make the pump. Said intake-and-discharge stations are identical and consist of two-way orifice valves while top covers accommodate sample level pickups and vacuum and pressure feed valves. Union to feed material at rarefaction of two-way orifice valves of both stations are interconnected via T-bend and flexible hose and connected with top union of flow measuring cell while union to feed material under pressure are interconnected by T-bend with flexible hose to drain measured sample portion in accumulation tank. Accumulation tank comprises union at its top part to receive sample from primary sampling system, measured sample return line, air separator and flushing water feed valve. Its bottom comprises T-bend connected with controlled drain valve and flexible hose for connection with measuring cell bottom union. Note here that air separator is composed of diffuser provided with conical splitter.

EFFECT: higher accuracy of measurements, continuous sample mixing, sample feed at rarefaction.

1 dwg

 

The claimed technical solution relates to the mining, mineral processing and metallurgical and chemical industries and is used in the automatic analytical control systems in the measurement of liquid samples in the form of suspensions, leachate and solutions.

The system includes a set of series-connected technical means for a representative sampling of technological product, formation and transport of the accumulated sample receiving station samples, separation and accumulation of parts for carrying control, filing and continuous circulation of liquid samples between cumulative capacity and the measuring cell unit, washing paths and removal of the measured samples and swabs. At this submission and circulation of the liquid sample in the measuring cell analyzers is an integral part of the overall objective of probability automatic analytical control systems of technological products such as suspensions.

There are various designs of circuits designed to solve these problems and technical solutions for individual devices:

in x-ray analyzers, "Courier-30",Finland, 1990, from each measured process stream is selected and pumping system is continuously fed to the measuring device through pipelines 200 litres is inutu primary samples. From this stream is automatically selected one-tenth - 20 liters per minute, which siphon under pressure is fed into the cell analyzer for measuring and discharged into the drainage. Then the entire volume of 200 liters per minute for each measured product, you must return a separate pumps in the process;

in x-ray analyzers, "Courier-30", Finland, 1990, in some constructions from each controlled process flow for circulation through the cell analyzer is fed continuously by gravity 20 liters per minute. In this regard, the analyzer is set at zero under the flow and processing equipment, and the return of samples shall be performed by separate pumps;

in other designs Courier-30", Finland, 1990, and AR-31, 1980-1992, Russia, discretely delivered from the place of the selection by the pneumatic measuring unit volume of sample (from 6 to 24 liters) and then fed to the circulation and measurement special pumping devices.

The volume of the selected sample is regulated by the required rate of flow through the cell and the time of exposure when measuring. It should also provide devices stirring suspension after delivery to the place of measurement before and during the time of the filing of the dimension.

There are different technical solutions of the samples in ramochnie measuring cell:

- special Electromechanical or pneumatic jet pumps in combination with the switching device.with. No. 2173452;

- capacity to collect portions, delivered by pneumatic post samples of suspensions equipped with devices to keep it ravnovzveshennuju state prior to the measurement with Strait through the measuring cell either by gravity or by the start of the ejector and then siphon pouring through the measuring cell AR-31.

All of these options circulation and submission of samples to the measuring cell have different drawbacks:

- large amounts of pumped samples,

- the need to use complex pumping equipment with the electric 380 volt,

- unnecessary maintenance labor and material costs for replacement of wear parts in the abrasive wear of the working areas,

the necessity of mixing different methods of suspension from the date of delivery in cumulative capacity before the end of the measurement.

Known technical solution according to the patent No. 2173452 from 25.12.2000, MKI G01N 1/10, G01N 35/08, EN. System analytical control of liquid samples contains connected in series means of sampling, transport line, vozduhorazdelitelnuju capacity, pump, relief valve and flow cell of the spectrometer, priceman provided with upper and lower switching devices, the upper switching device provided with a measuring capacity, capacity averaging samples and installed on the inlet of the device managed by the distribution tube located above the measuring capacity and capacity averaging the samples, and vozduhorazdelitelnaja capacity connected to the first input of the pump and its output is connected to a managed distribution tube and the measuring capacitance is connected through a flow cell of the spectrometer entrance lower switching devices, the output of which is connected to the third input of the pump, with flow-cell of the spectrometer is located at a height between the upper and lower switching devices. The lower the switching device contains a set of containers mounted on them of the distribution tube and the multi-position actuator, the stem of which is assigned a two-position actuator for moving the distribution tube. A relief valve installed in the pump casing.

The advantage of this solution is the ability to sequentially feed in one measuring cell for up to six different technological samples, as well as intensive mechanical mixing of the suspension in the circuit during preparation and measurement.

The disadvantage is constructive complexity, the need for the use of the Finance of a special pump with electric drive, the presence of wear of the working parts in contact with highly abrasive environment measured suspensions.

Closest analogue is the technical solution according to the patent No. 2419776 from 18.05.2009, MKI G01N 1/10, EN. Automatic analytical control of liquid samples. The system includes a controlled source of vacuum pressure, a sealed sample vessel, the analyzer privatbrauerei station in the form of sealed containers located in its cylindrical part fitting supply the water used for washing line sample delivery. The system includes a control unit, display and transmit information, including device electro-pneumatic and electric control, equipped with a programmable logic controller and software for digital signal processing. The vacuum device samples input to the measuring device consists of series-connected switching devices receiving alternately supplied technological samples or wash water, flow-through measuring cell and connected to the system ensure that the vacuum pressure privatbrauerei station. This priemootpravochnye station analytical complex is located below the level of the flow-through measuring cell and is made greater than the total volume supplied to the measurement about the s and wash water, and connected with the flow cell and with the return line. The ADF dimensional volume of water for flushing the measuring paths made in the form of coarse filter water. The electric control device analytical complex contains operator panel with display and visualization and provides in accordance with the sequence diagram control Prabhupada on measuring instruments, flushing, return of products in the manufacturing process, as well as receiving, processing, measurements and information transfer.

The advantage of this system is a comprehensive solution to all the requirements of the automatic selection, delivery, sample preparation solutions for the measurement and return them in the process.

The disadvantage of this system is the ability to control only liquid samples and the resulting finding of a portion of the sample solution in the measuring cell of an analyzer in a stationary state, which is unacceptable when working with process samples containing solid particles, suspensions, require the maintenance of an adequate circulation and mixing of the sample during the whole measurement time.

The technical result of the proposed solutions is the fulfillment of all requirements of probability when measuring samples of slurries and liquids in the machine is the ical analytical control systems, including conditions for the maintenance of mode mixing, circulation and filing them in the measuring cell under vacuum.

This goal is achieved as follows.

The system contains privatbrauerei station in the form of sealed containers, equipped in its lower part a managed two-way diaphragm valve, safety device, vacuum feed samples for measuring instrument, consisting of series-connected switching devices receiving, flow measuring cell, closed top protective pleney and connected to the system ensure that the vacuum pressure privatbrauerei station, with measuring cell made with lower I / o liquid products and is located in the highest point of the path of submission in her sample that excludes them from entering into the device in violation of the integrity of the film;

flow-through measuring cell is made of a closed top with a protective film;

the control unit, display and transmit information, including device electro-pneumatic and electric control, equipped with a programmable logic controller and software for digital signal processing, with additional priemootpravochnye station, component together with the first privatbrauerei station pumping device

transponder you need to program pravitelya stations are identical and consist of tanks, in the lower part of which are two-way diaphragm valves, in the upper lids placed level sensors sample and fitting vacuum and pressure separately;

- fitting the feed material under vacuum two-way diaphragm valves both privatbrauerei stations through the tee is connected by a flexible hose between themselves and with the upper fitting flow-through measuring cell, and fitting the feed material under pressure connected by a tee with a flexible drain hose return the measured portion of the sample in cumulative capacity;

cumulative capacity contains in the upper part of the fitting receiving process samples from primary sampling fitting return of the measured sample flow circuit, the air-purge drum and the supply valve of the flushing water, and at the bottom of the tee, one side of which is attached a controlled relief valve in the drainage of the measured sample or swab after washing the measuring paths, and another flexible hose connection with the lower fitting of the measuring cell;

the air-purge drum is made in the form of a cone placed inside a conical divider.

On the presented draft diagram of the feeder and circulation solutions and suspensions in flow-through measuring cell analyzers, where:

1.1 and 1.2 - privatbrauerei is tanzihi, the components of the pump device

2 - measuring cell,

3 - cumulative capacity,

4 is a block electrical control with the controller

5 - the two-way diaphragm valves 5.1, 5.2,

5.1.1, 5.1.2 - fitting feed material under vacuum, 5.2.1, 5.2.2 - fitting feed material under pressure,

6 - level sensors 6.1, 6.2,

7 - K1 - electroneurography compressed air to the ejector,

8 - Q2, Q3 - electroneurography vacuum pumping devices 1.1 and 1.2,

9 - electroneurography supply of wash water,

10 - fitting vacuum 10.1, 10.2,

11 - fitting compressed air 11.1, 11.2,

12 - ejector,

13 - K6, K7 - electroneurography control two-way diaphragm valves 5.1 and 5.2,

14 - K4, K5 - electroneurography compressed air pumping devices 1.1 and 1.2,

15 - flexible hose sample from the measuring cell to the pumping device,

16 is a flexible return hose samples,

17 is a flexible hose samples from the storage tank to the measuring cell,

18 - discharge valve

19 - fitting feeder primary samples from sampling systems,

20 air - purge drum.

The essence consists in the following.

The system consists of two working alternately privatbrauerei stations 1.1 and 1.2, the function of the pumping device. Privatbrauerei station and identical and represent capacity, in the upper part of which is placed level sensors 6.1 and 6.2, fitting 10.1 and 10.2 vacuum and fitting 11.1 and 11.2 pressure, and in the lower part of the two-way diaphragm valves 5.1 and 5.2.

For controlling the supply of vacuum to the fitting 10.1 and 10.2 provided by electroneurography 7-K1, the ejector 12 and electroneurography 8-K3 and 8-K2.

To control the supply of pressure to the fitting 11.1 and 11.2 provided by electroneurography 14-K4 and 14-K5.

To control the operation of the diaphragms of the two-way diaphragm valves 5.1 and 5.2 provides electroneurography 13-K6 and 13-K7.

Fitting 5.1.1 and 5.2.1 two-way diaphragm valves 5.1 and 5.2 feed material under pressure connected by a tee between themselves and the flexible hose 15 with the upper fitting of the measuring cell 2.

Fitting 5.1.2 and 5.2.2 two-way diaphragm valves 5.1 and 5.2 feed material under pressure connected by a tee between themselves and the flexible hose 16 with air-purge drum 20, located in the upper part of the storage tank 3.

In the upper part of the storage tank 3 includes: a supply valve wash water 9, the fitting 19 of sample from the sampler and a flexible hose 16 with air-purge drum 20.

In the lower part of the storage tank 3 posted by tee, one end of which is fixed a controlled discharge valve 18, and attached to another flexible hose 17 sample feeding of the storage tank 3 to the lower fitting of the measuring cell 2.

The control unit 4 with the controller is designed to ensure that the system flow and circulation suspensions and solutions flowing in the measuring cell 2 analyzers in automatic mode according to the sequence diagram.

The system works as follows.

Selected from the process stream primary sample product comes with a command from the controller analytical complex of the holding tank 3 through the nozzle 19. When this discharge valve 18 is closed. Starts the operation of the controller control unit 4 by the operation of the circulation system.

On command from the controller control unit 4 in accordance with the sequence diagram electrical power 24 V coils of the valves 7-K1, 8-K2, 13-K6. When this compressed air pressure of not less than 3.5 atmospheres, passing through the ejector 12 creates a vacuum of-0.8 ATM, through the open valve 8-K2 and fitting 10.1 creates a vacuum in the tank privatbrauerei station 1.1. Is drawn samples from the storage tank 3 by a flexible hose 17 through the lower and upper nozzle flow-through measuring cell 2, the fitting 5.1.1 and one of the cavities of the two-way diaphragm valve 5.1 capacity privatbrauerei station 1.1. When this suction cavity two-way diaphragm valve 5.2 privatbrauerei station 1.2 closed by the diaphragm. Filling capacity 1.1 to ur is una, determined by the sensor 6.1. The sensor signal level 6.1 in accordance with the sequence diagram and the command from the controller is supplied electrical power from 24V to the coil electroneurography 7-K1, 8-K3, 14-K4, 13-K7 and removed the power supply with 8-K2 and 13-K6. Occurs simultaneously switching the two-way orifice valves 5.1 and 5.2 and the switch from vacuum to pressure in privatbrauerei station 1.1 and the vacuum in privatbrauerei station 1.2.

At the same time happen following systems:

- previously accumulated sample from privatbrauerei station 1.1 under the pressure of compressed air supplied through the nozzle 11.1, drained through the discharge fitting 5.1.2 two-way diaphragm valve 5.1 on a flexible return hose sample 16 and the air-purge drum 20 in cumulative capacity 3,

under the action of the vacuum supplied from the ejector 12 through the valve 8-K3, privatbrauerei station 1.2 creates a vacuum and the sample from the storage tank 3 by a flexible hose 17 through the lower and upper nozzle flow-through measuring cell 2, the tee fitting 5.2.1 and one of the cavities of the two-way diaphragm valve 5.2 begins to fill the capacity privatbrauerei station 1.2 to the level determined by the sensor 6.2. The traffic flow in the flow cell 2 is not interrupted.

This ends one of the ikl movement of the sample in a closed circuit. Alternate filling breakdown privatbrauerei stations 1.1 and 1.2 under the action of vacuum and subsequent alternate discharge of the sample into the accumulation tank 3 under the action of compressed air by automatic control of the controller according to the sequence diagram using electroneurography and ejector, as described above, generates the mode during the whole measurement time continuously operating pump unit, providing a stirring suspension and circulation samples from the storage tank 3 through the measuring cell 2 and the return of the holding tank 3.

Because a full breakdown of the containers privatbrauerei stations 1.1 and 1.2 is the bottom due to the vacuum, that during the whole time of filling is continuous movement and mixing of the solid phase of the suspension, which prevents the precipitation of solid particles in the sludge, which is a necessary condition for measuring samples of the suspensions even with high solids content. At the end of the measuring cycle of the sample close the valve of the compressed air supply 7-K1, without disrupting the operation of other valves in the automatic cycle, the circulation stops, is blowing all paths and discharge of residues of samples through the accumulation tank 3 when you open the discharge valve 18 in drainage.

After discharge of the measured sample all trachesotomy washed. To this end, controller electrical control unit 4 according to the sequence diagram serves electric power to electroneurography 9, close the discharge valve 18 and a portion of the wash water enters the holding tank 3. Then open the valve of the compressed air supply 7-K1. Since the work of other electroneurography not violated, circulate wash water through the measuring paths with cleaning system residues from previous samples with subsequent draining of the rinse to drain through the discharge valve 18, as described above.

A valid use of one privatbrauerei station when solving problems of primary sampling polyparaphenylene boxes, and other equipment. This priemootpravochnye station performs the function of a vacuum sampler. Sampling is carried out through a flexible hose, one end of which is omitted in the process stream, and the second is connected to the suction fitting the two-way diaphragm valve 5. When the vacuum in the tank privatbrauerei station is drawn in a technology preview and accumulation to a level determined by the sensor 6. On a signal from the level sensor 6, the command from the controller control unit 4 in accordance with the sequence diagram at the same time switch diaphragm dochodow the first valve 5, served compressed air into the tank privatbrauerei station 1 and the collected sample through the inlet fitting two-way diaphragm valve 5 connected with the transport pipeline is transported to the place of analysis.

Advantages of the proposed system automatic feed and circulation samples of suspensions and solutions in the flow cell of the measuring device are:

- simple design devices circulation, ease of maintenance;

the abrasive wear in rotating parts of the pressure centrifugal pumps and in working areas of jet pumps;

at the same time ensuring high quality mixing of samples across the path of circulation, including in the measuring cell;

- minimization of the volume of the sample to be measured and improved accuracy of measurement due to repeated circulation

- increase security and reduce power system operation through the use of 24 V DC;

- ability to use as a vacuum sampler.

The claimed technical solution is developed and tested in CJSC TECHNOLINK St. Petersburg, Russia.

Automatic filing and circulation of suspensions and solutions in a flow-through measuring cell analyzers
contains
privatbrauerei station in the form of a germ the primary capacitance, provided in the lower part of a controlled two-way diaphragm valve,
the vacuum device samples input to the measuring device, consisting of series-connected switching devices receiving, flow measuring cell and connected to the system ensure that the vacuum pressure privatbrauerei station, with measuring cell made with lower I / o liquid products and is located in the highest point of the path of submission in her sample that excludes them from entering into the device in violation of the integrity of the film
flow-through measuring cell is made of a closed top with a protective film;
the control unit, display and transmit information, including device electro-pneumatic and electric control, equipped with a programmable logic controller and software for digital signal processing,
characterized in that
- added priemootpravochnye station, component together with the first privatbrauerei station pumping device;
- privatbrauerei stations are identical and consist of tanks, at the bottom of which are two-way diaphragm valves, in the upper lids placed level sensors sample and fitting vacuum and pressure separately;
- fitting the feed material under vacuum the two-way diaphragm valves both privatbrauerei stations through the tee is connected by a flexible hose between themselves and with the upper fitting flow-through measuring cell, and fitting flow of material under pressure connected by a tee with a flexible drain hose return the measured portion of the sample in cumulative capacity;
cumulative capacity contains in the upper part of the fitting receiving process samples from primary sampling fitting return of the measured sample flow circuit, the air-purge drum and the supply valve of the flushing water, and at the bottom of the tee, one side of which is attached a controlled relief valve in the drainage of the measured sample or swab after washing the measuring paths, and another flexible hose connection with the lower fitting of the measuring cell;
the air - purge drum is made in the form of a cone placed inside a conical divider.



 

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3 dwg, 1 tbl, 1 ex

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of environmental monitoring, soil science and dendrology. The method includes detection of a place, frequency, duration of soil sampling on an investigated area. For this purpose they assign sampling sites in accordance with a coordinate grid, indicating their numbers and coordinates. Besides, sampling is done with an account of a vertical structure, heterogeneity of the soil cover, area relief and climate. When investigating agricultural lands, samples are taken from a depth from 0 to 5 cm. The vertical structure of the soil cover is taken at each side separately with an account of homogeneity of the soil cover and coastal relief near the small river or its tributary in a gauging site taken perpendicularly to the river bed. At the same time the vertical structure in the form of a profile is determined by measurements from the coast edge to the point of sampling at the depth of the soil layer of 0-5 cm and the height of the soil cover from the soil surface to the lower surface of the soil cover at the border with the soil parent rock. Besides, the number of sampling sites at one gauging site and at one side of the small river or its tributary is taken as at least three. Before biochemical analysis they remove grass roots from the soil samples, measure values of biochemical indices of pH, P2O5, K2O, HNO3, the sum of mobile potassium, phosphorus and nitrogen of nitrates. According to the results of the biochemical analysis of three soil samples for the concentration of chemical substances along each vertical structure they perform statistic modelling for the detection of stable biotechnical laws.

EFFECT: method makes it possible to increase the accuracy of soil sampling under a floodplain meadow for comparison of measured concentrations of biochemical substances in the soil cover.

7 cl, 7 dwg, 1 ex

Sampler // 2531930

FIELD: process engineering.

SUBSTANCE: invention relates to loose material sampler, for example, for powders of chemically active metals with particle size of up to 15 mm. Sampler comprises cylindrical pipe with charging openings furnished with bumper plates. Sampler charging openings are composed of slit-like clearance its size 2.5-10.0 times larger than maximum particle size of powder while angle between slit-like clearance plane and pipe horizontal cross-section is smaller than natural slope of loose material.

EFFECT: higher reliability and validity of samples.

3 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to sampler, filter and method of sampling. Sampler comprises case and two pistons to displace therein to compress the sample contained therein. At least one of said pistons can enter the reactor for sampling. Sampler comprises sampling chamber composed between inner space and pistons and at least one connector to connect the container for samples. Sampler comprises filter connected to one of said pistons to separate liquid sample components from solid component and means to discharge liquid component from sampling chamber. Filter comprises casing with through opening, several filter elements arranged there inside around said opening, each including at least one filter membrane with holes. Proposed method comprises the jobs that follow. First piston is fed into reactor and pulled into sampler case, the piston displacing the sample ahead for it to be compressed between pistons and to be pushed into sample container connector. Liquid phase of the sample is filtered at pushing the sample through filter and directing it via first piston hollow rod into aforesaid connector.

EFFECT: automatic sampling at separation solid phase from liquid phase.

33 cl, 16 dwg, 1 tbl

FIELD: measuring instrumentation.

SUBSTANCE: device for regular water sampling from definite ocean depths includes reinforced hose with its upper end attached to a floating unit and connected to flexible hose, and lower end attached to water collection chamber and brought to a definite depth by ballast load. The floating unit carries a tubular swivel on its top, connected to the flexible hose attached with its end to a winch mounted at the bottom of floater, and connected to axial clutch changing into bearing pipe put out on the floater top.

EFFECT: enhanced device operation reliability, extended technical capabilities.

2 cl, 2 dwg

FIELD: instrumentation.

SUBSTANCE: device for preparing control gas mixtures comprises a gas mixer, at least one channel for supplying target gas to the gas mixer, at least two channels for supplying the diluent gas to the gas mixer, and the channel for output of the gas mixture from the gas mixer. And in each channel for supplying gas to the gas mixer the mass flow controller of gas and a solenoid valve are mounted successively, at least in one channel for supplying the diluent gas to the gas mixer the gas humidifier and the solenoid valve are mounted successively. In each of the channels equipped with the gas humidifier at least one bypass pipeline with the additional solenoid valve is mounted. and the output of the gas flow controller of this channel is connected to the input of the additional pipeline which output is connected to the output of the last solenoid valve, and at the input of the target gas and the input of the diluent gas at least one filter is mounted, which outputs are connected to the inputs of manually operated valves.

EFFECT: possibility of operational automated obtaining the dry or moist gas mixture, and reliable obtaining of the given values of concentrations of gas mixtures at the output of the device.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to forestry and can be used for standing wood certification, for example, at lumbering operations, certification of wood stock and semi-finished products and storage of whatever lumber. Besides, it can be used in wood science and engineering ecology at evaluation of ecological conditions by properties of growing tree wood. Proposed method comprises making round saw cuts of test tree with marks of geodesic directions for analysis wood properties along fibres and by radius of tree trunk and cutting of cylindrical specimens. First, saw cut circular cuts are marked at centres of axes of future cylindrical specimens. Then, set of cylindrical cutters are fitted by their cutting part on said round saw cut. Thereafter, cylindrical saw cut round specimens are cut simultaneously by the set of cylindrical cutters. Proposed device comprises the set of cylindrical cutters. Every cutter is made of tool steel shaped to sleeve of ID equal to cut cylindrical specimen diameter. Sleeve one end is shaped to cutter with one-side sharpening on the sleeve outer side while second end has support chamfer to interact with the bush.

EFFECT: higher efficiency of cylindrical specimen production on one round saw cut.

8 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: sample surface is obtained by split of a monolith, after which a successive application of polymer solutions on the sample is performed. As the polymer solutions used are: first, a 0.5% solution of formvar in dichloroethane, and then, a 2% solution of polymethylacrylate in dichloroethane with an exposure of the sample at a negative temperature to dry each layer and obtain a solid film. After drying the obtained film with particles of soil is detached from the sample and analysed in a scanning electron microscope.

EFFECT: method improvement.

4 dwg

FIELD: measurement equipment.

SUBSTANCE: method to sample high-temperature gases at temperatures of up to 600°C includes measurement of gas volume pulled via a sampling probe by means of aspiration, and collection of condensate with reduction of the taken sample volume to normal conditions. To produce a representative sample that characterises a source of emission, the flow of high-temperature gases is cooled down to temperature of condensation of vapours of volatile components with account of fuel consumption and modes of engine operation. Aspiration of the sample volume is carried out with pressure difference in the condensate collector and in the flow of spent gases, besides, the flow of sampled high-temperature gas is used to create the "boiling layer" from initiators of condensation of volatile components vapours. At the same time the volume of the taken sample is compared to fuel consumption and mode of engine operation, and condensate is kept in the condensate collector under tight conditions to the start of stagewise investigation of concentration of separate components. The device comprises a sampling probe, a facility to measure the volume of high-temperature gases and a condensate collector. The sampling probe is equipped with a facility to measure temperature of sampled gases, the collector of condensate of spent gases has an external vacuumised heat-shielding shell, between layers of which there is a cryogenic liquid placed, and a facility to measure condensate temperature. Ball-shaped initiators of condensation are made of chemically inert material, which is capable of absorbing water vapours in spent gases composition. The cover of the condensate collector is thermally isolated from the vacuumised heat-shielding shell of the collector of spent gases condensate and nozzles for insertion of the sampling probe and discharge of cryogenically treated gases equipped with valves. At the same time the discharge nozzle is equipped with a filtering element, and the cover of the condensate collector has a control panel interconnected with the facility to measure temperature and gas volume taken for analysis, a level indicator of the cryogenic liquid and the facility to measure temperature of collected condensate.

EFFECT: development of the method and device to take representative samples of high-temperature gases of mobile sources of toxic emissions, which contain condensing elements that require special low-temperature conditions to keep them in the sample before entering them into a measurement device.

2 cl, 1 dwg

FIELD: automatical aids for sampling liquids.

SUBSTANCE: system for sampling and delivering filtrate has filter submerged into tested medium and connected with collecting tank and vacuum pressure source which is connected with top hole of collecting tank by means of pneumatic pipe. System has sample receiving tank connected with collecting tank and control unit which has first output to be connected with vacuum pressure source. Collecting tank has two separated chambers - washing chamber and dispatching chamber. Lower hole of washing chamber has to be lower hole of collecting tank and side hole of dispatching chamber has to be side hole of collecting tank. Floating valve is installed inside washing chamber to shut off lower and top holes. Filter is connected with lower hole of collecting tank through sampling pipe. Side hole of collecting tank is connected with lower hole of tank for receiving samples through sampling pipe. Flow-type sensor and check valve are installed inside transportation pipe. Output of flow-type sensor is connected with input of control unit; second output of control unit is connected with control input of analyzer.

EFFECT: improved precision of measurement of sample ion composition; prolonged service life of filter.

1 cl, 1 dwg

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