Device for sampling

 

(57) Abstract:

Usage: the invention relates to a device for sampling a gaseous and liquid state. The inventive device for sampling includes an axial tube, one end of which is connected through a detector means to induce flow of the medium, and the second end is made open. The first intermediate tube has one end opening, and at the other end plugged, through which is threaded open end of the axial tube. The second intermediate tube has one end open and the other end has a plug, through which is threaded open end of the first intermediate tube and placed in the tube. The outer tube has one end open and the other end plugged, through which is threaded open end of the second intermediate tube and placed in the tube. The first and second intermediate and the outer tube side plugs are connected through pipes with means of motive flow environment, and all means of inducing flow environment associated with system monitoring and control. 4 Il.

The invention relates to a device for sampling a gaseous and liquid state, in particular the mass spectrometry.

A device for submitting samples for analysis, including the valve, discharge manifold, outlet manifold, made in the body of the camera, the fittings of the input, output and reset of the analyzed samples. The device is equipped with glasses with longitudinal slits attached to the fittings of the input set coaxially in the cylindrical chambers springs placed inside the elastic of glasses. The body is made channels connecting the input of the subsequent camera with the release of the previous [1].

It is known device for introducing samples into the gas chromatograph, containing two fixed plates having channels for the supply of the sample liquid, reset it and enter samples into the chromatograph evaporator, boot loop and two-position valve associated with the actuator and having channels for switching channels in a stationary plates. In one of the stationary plates made additional channel to reset the carrier gas from the evaporator. The boot loop is executed in the camera view with movably mounted inside the piston and communicated with her transition channel. In one of the positions of the valve internal cavity transition channel is connected to the channel reset the analyzed fluid. Channel input samples in Ipari the channel input samples into the chromatograph evaporator [2].

The disadvantages of the above prior analogues is a large number of restrictions on the use, especially when used in microanalytical techniques. These sampling devices are valves with moving elements and the channels through which flows the sample. When switching the direction of flow between the different channels can leak because of the insulation, or moving parts may be damaged due to the presence of foreign substances contained in the media or in the sample. If the sample consists of aggressive substances, it can also cause damage to the device, in addition, the valves may not be made of the same inert material of the detector, which introduces the sample. Therefore, the sample may partly be absorbed by the sampler, or a foreign substance can be added from the sampler to the sample. Since the size of the sample loop is usually set to the characteristic length of the pipeline, the volume of the sample can be easily varied. The number of sample material that needs to be put into the sample loop, requires a relatively large sample volume and leads to a long cycle of sampling. When the control sample and the carrier, which degrades the quality of analysis.

The closest technical solution (prototype) is a device for sampling and submitting samples for analysis, including an axial tube, one end of which is connected through a detector means to induce flow of the medium, and the second end is made open; an intermediate tube, one end of which is open, while the other has a plug, through which is threaded open end of the axial tube and placed in the tube; the outer tube, one end of which is open and the other has a plug, through which is threaded open end of the intermediate tube and placed in the tube; the corresponding plugs in the ends of the intermediate and outer tubes are connected through pipes with means of motive flow environment; the system of control and management connected with all means of motive flow environment [3].

The device prototype contains a number of significant disadvantages. It has a fundamental limitation on the duration of the sampling cycle. For all modes of operation of this device there is a critical duration of sampling, above which the sample or its individual components penetrate into the stub area intermediate the tubes, with appropriate motives streams environment. Critical cycle time of sampling is limited by the filling time break of the inner chamber to the intermediate stub tube at isokinetic sampling and the time of diffusion of the sample components with the highest diffusion rate at a given temperature of the device from the inner chamber to the intermediate stub tube and communications, connecting this chamber with means of motive flow environment, in all other modes. Duration of the sampling cycle are enhanced by reducing the axial length of the tube (in the case of miniaturization of the device) and at a relatively rapid fluctuations of pressure in the sample during the sampling cycle. the penetration of the sample components in the region of the intermediate stub tube and links connecting the internal chamber with the respective valves, during sampling leads to uncontrolled intake of these components in the internal chamber in the intervals between sampling, which leads to a distortion of the results of quantitative and qualitative analyses. In addition, the device cannot be used as an intermediate stub tube material is mperature. The impurities released from the material of the intermediate stub tube will be uncontrolled flow to the internal chamber between sampling cycles and lead to distortion of the results of quantitative and qualitative analyses.

The present invention is the task of creating such a device, which would ensure the selection of a gaseous or liquid samples in terms fluktuiruyushchem pressure at the sampling site in continuous and pulsed mode without pollution, on the one hand, sample impurities released from the material of the sampler, and on the other hand, is a hard-to-reach sites of sampler components of the sample due to diffusion processes, in consequence of which would increase the reliability of the quantitative and qualitative analysis.

The problem is solved in that the device for sampling, including axial tube, one end of which is connected through a detector means to induce flow of the medium, and the second end being open; a first intermediate tube, one end of which is open and the other has a plug, through which is threaded open end of the axial tube; the outer tube, one end of which is made of okruszek connected by pipe means to urge streams environment and all means of inducing flow environment connected with system monitoring and control, according to the invention it is provided with a second intermediate tube, one end of which is open, passed through the cover of the outer tube and placed in the tube and the other end has a plug, through which is threaded open end of the first intermediate tube and placed in the tube, and the second intermediate tube-side stub is connected by pipe means to induce flow of the medium, and the axial tube has been passed through the first intermediate tube, the open end of which is located in the second intermediate tube.

New distinctive features of the prototype characteristics of the proposed device provides in all operating modes of the device forming and feeding a continuous stream of media (net) inside the second intermediate tube through the chamber formed between the walls of the first and second intermediate tube, and forming and feeding a continuous flow of the medium (media and samples) from the second intermediate tube through the chamber formed between the walls of the first intermediate and axial tubes (threads) prevent the penetration, on the one hand, samples from the second Avenue is the Rhone - impurities from the stub of the first intermediate tube and the sample from the chamber formed between the walls of the first intermediate and axial tubes, the second intermediate tube, which increases the reliability of the quantitative and qualitative analysis.

The invention is further illustrated by the specific implementation and the accompanying drawings, in which Fig. 1 presents a diagram of the device for sampling; Fig. 2 is a schematic demonstration of the mode of the lack of sampling in the device of Fig. 3 is a schematic demonstration of the initial phase of a sampling device of Fig. 4 is a schematic demonstration of the final phase of the sampling device.

N. Fig. 2, 3 and 4, the shaded areas represent the sample and the remains of the samples after the previous sampling; where there's no shading areas represent the media, and the arrows depict the direction of flow. The symbol "A" marks the boundary between the sample and the carrier, which is located at the entrance to the open end of the second intermediate tube or channel of the tube; the symbol "B" denotes the front boundary between the sample and the carrier located in the axial tube; the symbol "b" marks the boundary between the sample and the carrier, located at what the border between the sample and the carrier, located in the annular chamber formed between the walls of the axial and the first intermediate tubes; the symbol "D" is the rear boundary between the sample and the carrier located in the axial tube.

Device for sampling includes an axial tube 1, the end 2 of which is connected through the detector 3 by means of motive flow (not shown), and the end 4 is made open. The first intermediate tube 5 has an open end 6 and at the other end of the installed plug 7. Through the cover 7 is omitted axial tube 1. The second intermediate tube 8 has an open end 9 and at the other end of the installed cap 10. Through the cap 10 is omitted the open end 6 of the first intermediate tube 5 and is placed in the second intermediate tube 8. The outer tube 11 has an open end 12 and at the other end of the installed plug 13. Through the cover 13 is omitted the open end 9 of the second intermediate tube 8 and is placed in the tube 11. The axial tube 1 skipped through the first intermediate tube 5, the open end 4 which is placed in the second intermediate tube 8. Between the walls of the tubes 1 and 5 is formed an annular chamber 14 between the walls of the tubes 5 and 8 is formed an annular chamber 15, and between the walls of the tubes 8 and 11 of the annular chamber 16.s environment 20, 21 and 22, respectively. System 23 control connected with all means of motivation streams environment.

The device operates as follows.

According Fig. 2, in the first stage of operation of the device, in the phase of the lack of sampling, no penetration of the sample and impurities in the cavity of the second intermediate tube 8 and the tube 1 through the establishment in the tube 8 pressure higher than that in the tube 11, the camera 14 and the tube 1. For this purpose the bearer of the means of inducing stream 21 is fed through the pipe 18 and the chamber 15 into the cavity of the second intermediate tube 8, from which streams of media distributed in the annular chambers 14, 16 and the open end 4 of the tube 1 to the removal of residue samples from previous sampling and exceptions penetration into the cavity of the tube 8 of the impurities from the area of the stub 7. In this case, before the open end 9 of the tube 8 between the sample and the carrier is formed border "And". The media flowing in the pipe 11 of the tube 8, together with the flow of the sample from the external environment into the tube 11 through its open end 12, is removed through the chamber 16 and the outlet 19 in the tool promptings of flow 22. The media and the remains of the sample from the chamber 14 are removed through pipe 17 into the tool urges the flow in the cavity of the tube 8 is reduced, for example, by reducing the flow of media through the pipe 18 and the simultaneous increase of the flow rate chamber 14 and the nozzle 17 through the output means urges streams environment 21 and 20 respectively. With the border "And" phases moving from the open end 9 into the tube 8, reaches the open end 4 of the tube 1, penetrates inside of the tube 1 with the subsequent formation there of the border "B" section between the sample and the carrier. Next, the boundary B is moved through the pipe 1 in the direction of the detector 3. Speed limits "a" and "B" are the same only when isokinetic sampling. When the limit is reached "And" open end 6 of the tube 5, the sample enters the chamber 14, the pipe 17 and then into the tool induce flow of the medium 20, and at the entrance to the annular chamber 15 is formed stable "border" between the carrier and the breakdown precluding penetration of the latter into the chamber 15. The initial phase of the sampling continues until the desired sample volume will not enter the tube 1.

According Fig. 4, in the final phase of sampling increase the pressure in the cavity of the tube 8, for example, by increasing the flow of media through the chamber 15 and the outlet 18 and the simultaneous decrease of the flow rate through the Kama is built. The tube 8 instead of the border "In" with one side of the newly formed border "And" between the sample and the carrier, which is shifted to the open end 9 of the tube, and on the other hand formed the border of the "G" at the entrance to the annular chamber 14, and is further moved in this chamber in the side of the cone 7 of the tube 5. When crossing the border, "A" partition of the sample and carrier through the plane in which is located the open end 4 of the tube 1, in the channel of the latter forms the rear boundary D between the sample and the carrier, i.e., in the channel of the tube 1 between the borders of "B" and "D" formed the sample of the sample, which has no impurities and is ready for submission to the detector 3. The pressure in the inner cavity of the tube 8 is increased to such a value that the border "And" established before the open end 9 of the tube 8, the boundary of G shifted in the chamber 14 in the direction of the stub 7 of the tube 5, and the sample of the sample was moved in the tube 1 in the direction of the detector 3, while maintaining the unperturbed boundary "B" and "D".

After the media will begin to flow into the cavity of the tube 11 from the open end 9 of the tube 8, the sampling can be repeated.

Operation of a prototype of the proposed device shows that when imperatritsa due to the formation of a continuous stream of media flowing through the chamber formed between the walls of the axial and the first intermediate tube, and through the chamber formed between the walls of the first and second intermediate tube, and prevents the ingress of contamination in the investigated sample, which increases the reliability of the quantitative and qualitative analysis in all operating modes of the device.

Industrial applicability. The invention can be used in analytical instrumentation.

Device for sampling, including axial tube, one end of which is connected through a detector means to induce flow of the medium, and the second end is made open, the first intermediate tube, one end of which is open, while the other has a plug, through which is threaded open end of the axial tube, the outer tube, one end of which is open, while the other has a plug, and the first intermediate and the outer tube side plugs are connected through pipes with means of motive flow environment, and all means of inducing flow environment associated with the control system and control, characterized in that that it is provided with a second intermediate tube, one end of which is open, skipped h the open end of the first intermediate tube and placed in the tube, the second intermediate tube-side stub is connected through a pipe with means to induce flow of the medium, and the axial tube has been passed through the first intermediate tube, the open end of which is located in the second intermediate tube.

 

Same patents:
The invention relates to the field of analytical chemistry and can be used for analysis of multicomponent elixirs, balms, tinctures and other liquid dosage forms based on vegetable raw materials, for example, to determine the identity of investigational drugs for their standardization

Chromatograph // 2054669
The invention relates to gas chromatography and can be used for quantitative determination (certification) of the individual components of multicomponent mixtures of arbitrary composition

The invention relates to analytical chemistry and can be used to control volatile alkylamines followed in the environmental objects

The invention relates to techniques for sampling gases and air under the control of contents of moisture, oxygen, nitrogen, hydrogen, helium, carbon monoxide, carbon dioxide and other gases, vapors and impurities predominantly linearly-colour method using ampulirovannyh indicator tubes

The invention relates to methods and devices for obtaining samples from the atmosphere in a hermetically closed vessel, in particular from the tank of reactor protection of nuclear power plants

The invention relates to Cytology
The invention relates to medicine, more specifically to techniques for the production of histological samples of various tissues, and can be used for differential diagnosis of pathological conditions of the body

The invention relates to medicine, namely to neurohistological research methods

The invention relates to medicine, namely to neurohistological research methods

The invention relates to techniques for sampling of compressed gases and air under the control of contents of impurities, oil, moisture, carbon monoxide, carbon dioxide and other impurities predominantly linearly-colour method using indicator tubes

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

FIELD: hydrology; hydrobiology.

SUBSTANCE: device for simultaneous sampling of water samples taken from layers of water laying close to each other, has set of cylinders with pistons disposed onto carrying frame. End parts of all cylinders are hermetically tied with multiplier, which is connected with pump by means of hose pipe. Front edges of all cylinders are provided with beaks having entrance holes for taking water samples. Pistons moves inside cylinders due to hydraulic tie-rod. Space inside hose-pipe, multiplier and end parts of all cylinders is filled with water to avoid corrosion.

EFFECT: improved reliability of efficiency of operation; better protection corrosion.

FIELD: investigating or analyzing materials.

SUBSTANCE: device has cylindrical housing, heater, clamp, pump for pumping water to be investigated, and valve for insulation of the sample from ambient water. The device is provided with a unit which has an assembly of cells with microbiological filters connected in parallel. The diameters of the cells are different. The device has additional heater mounted in the top part of the housing and additional valve. The cell assembly is interposed between the valves.

EFFECT: enhanced reliability of sampling.

1 dwg

FIELD: investigating or analyzing materials.

SUBSTANCE: device has cylindrical housing, heater, clamp, pump for pumping water to be investigated, and valve for insulation of the sample from ambient water. The device is provided with a unit which has an assembly of cells with microbiological filters connected in parallel. The diameters of the cells are different. The device has additional heater mounted in the top part of the housing and additional valve. The cell assembly is interposed between the valves.

EFFECT: enhanced reliability of sampling.

1 dwg

FIELD: investigating or analyzing materials.

SUBSTANCE: sampling device has sampler, changeable batching member which is made separately from the sampler, housing, and wind-protection device. The wind-protection device is made of porous diaphragm mounted in the base of the housing and overlaps it. The sampler is mounted to provide the distance between the inlet port of the sampler and diaphragm to be 0.1D<L<0.3D, where D is the diameter of diaphragm and L is the distance between the inlet port of the sampler and diaphragm.

EFFECT: improved design.

3 cl, 1 dwg

FIELD: test technology.

SUBSTANCE: sample for testing porous materials by means of shock compression is made in form of a disc with flat parallel bases and cone side surface. Diameters of bases of disc relate as (7-8):1. Thickness of sample equals to (0,15-0,2) diameter of larger base.

EFFECT: reduced number of tests; improved precision.

2 dwg

FIELD: meteorology.

SUBSTANCE: device has sampling cylinder provided with cutting ring with teeth, piston with pusher, cutting members secured to the inner side of the ring, and cover with central threaded opening for the pusher made of a screw. The cover and pusher are provided with handles.

EFFECT: enhanced convenience of sampling snow.

4 cl, 5 dwg

FIELD: analyzing and/or investigating of materials.

SUBSTANCE: method comprises setting the sampling member and means for measuring the flow parameters into the pipeline, pumping a part of the flow through the sampling member, and determining the parameters of the flow.

EFFECT: enhanced reliability of sampling.

1 dwg, 1 tbl

Up!