KR102350274B1 - Sampling system and sampling method - Google Patents

Abstract

The present invention relates to an intermittent sample collection apparatus and method, comprising: a cyclone that filters particulate foreign matter contained in the harmful gas by introducing a noxious gas from a polluted area; a solenoid valve connected to a cyclone and a large pipe while a middle pipe provided to pass through the large pipe is connected to a port different from the large pipe; a first pump connected to the solenoid valve as a plurality of ports to suck gas flowing through the large pipe and the middle pipe, respectively, to the solenoid valve; a filtering tube connected to the first pump to purify the harmful gas introduced by the first pump and supply it to the middle pipe; a detector connected to an element pipe provided to pass through the middle tube to measure noxious gas flowing through the element pipe; It provides a sample collection device comprising a; a second pump connected to the detector to suck the noxious gas to the detector through the tube.

Description

Intermittent sampling device and sampling method {Sampling system and sampling method}

The present invention relates to an intermittent sample collection device and method, and more particularly, to an intermittent sample collection device and method for intermittently collecting samples such as harmful gas or polluted air to prevent deterioration of detector performance. will be.

In general, in the Hazardous Chemicals Control Act, in preparation for chemical accidents and terrorism, chemical substances that are highly toxic or explosive and have a high probability of occurrence or are feared to cause large damage in the event of an accident are designated as accident-preparing substances and managed separately. are doing

Some of these accident-preparing materials are highly volatile, so in the event of a chemical accident or terrorism, they are likely to spread rapidly to a large area and cause great damage.

Therefore, in the event of such a chemical accident or terrorism, rapid qualitative confirmation of these substances is required first, and confirmation of the exposure amount and concentration of the accident-causing substances in the air for the selection of the boundary zone of the hazardous area is difficult. necessary.

For such rapid analysis of accident-causing substances, above all, it should be possible to analyze accident-preparing substances and terrorist-probable substances, and in some cases, an appropriate sampling method for transporting and analyzing these samples is required.

In particular, in order to respond quickly in the event of a chemical accident or chemical terrorism, rapid collection must be made at various points at the site of damage.

The direct sampling method is a method in which a professional agent wears protective clothing and is directly put on site to collect a contaminated sample in a specific area. There is a disadvantage in that there is a risk that the collector is directly exposed to the contaminated sample during the collection process.

The indirect sampling method has the advantage of being relatively safe compared to the direct sampling method because the possibility of exposure to contaminated samples is lower than that of the direct sampling method.

In this indirect sampling method, there is a sampler equipped with a sampling mechanism in a remote controllable driving device (including a robot, etc.), and such a sampler collects a contaminated sample while moving to a contaminated area by remote control.

And, recently, a detector (detector) is mounted on a sample collector, and a sample collector has been developed and used to collect a sample of a polluted noxious gas and measure the concentration of the sample to immediately know the degree of contamination.

However, since the detector is provided in an exposed state in the conventional sampler, the contaminated noxious gas continues to flow into the detector while the sampler moves in the contaminated area, and the performance of the detector rapidly deteriorates due to the high concentration of noxious gas. Therefore, there is a problem in that even if harmful gas is collected from a desired contaminated area, it cannot be properly inspected (or measured).

Republic of Korea Patent Registration No. 10-0730013 Republic of Korea Registered Utility Model No. 20-0272438

Therefore, the present invention has been devised to solve the problems of the prior art as described above, and while blocking the direct inflow of the contaminated high-concentration noxious gas to the detector during the process of moving from a contaminated area to a specific area for sample collection, An object of the present invention is to provide an intermittent sampling device and method for intermittently collecting and measuring only contaminated samples in a specific area.

An intermittent sampling apparatus according to the present invention for achieving the above object includes: a cyclone through which noxious gas from a polluted area is introduced to filter particulate foreign substances contained in the noxious gas; a solenoid valve connected to a cyclone and a large pipe while a middle pipe provided to pass through the large pipe is connected to a port different from the large pipe; a first pump connected to the solenoid valve as a plurality of ports to suck gas flowing through the large pipe and the middle pipe, respectively, to the solenoid valve; a filtering tube connected to the first pump to purify the harmful gas introduced by the first pump and supply it to the middle pipe; a detector connected to an element pipe provided to pass through the middle tube to measure noxious gas flowing through the element pipe; It may include; a second pump connected to the detector to suck the harmful gas to the detector through the tube.

In addition, the first valve is provided at the connection part of the main pipe and the solenoid valve, and the second valve is provided at the connection part of the solenoid valve and the first pump, so that the first and second valves are separated or connected by the solenoid valve. .

In addition, when the first and second valves are separated by the solenoid valve, the purified gas purified from the filtering tube is supplied to the large pipe through the middle pipe, and the harmful gas and the purified gas collide at the inlet of the middle pipe to prevent the inflow of the noxious gas into the primary pipe When the blocking air curtain is formed and the first and second valves are connected by the solenoid valve, the purified gas supplied to the middle tube is sucked by the first pump and circulated to the filtering tube, so the air curtain formed at the inlet of the middle tube This release may be provided so that noxious gases are introduced into the tube.

In addition, the intermittent sample collection method according to the present invention for achieving the above object is a sample collection method using the above sample collection device, wherein harmful gas from a contaminated area is introduced into a pipe by a first pump, and the first valve and , the first pump and the filtering tube are converted into purified gas, and this stagnant gas is supplied to the middle tube and collides with the harmful gas at the inlet of the middle tube to form an air curtain to block the inflow of the harmful gas into the tube. blocking step; The solenoid valve operates and the first and second pumps are driven while the first and second valves are connected, and the harmful gas from the contaminated area is introduced into the main pipe by the first pump and passes through the first and second valves and the filtering tube. The purified gas is supplied through the middle pipe, sucked by the first pump, circulated to the filtering tube, the air curtain is released, and at the same time, the harmful gas introduced into the large pipe by the second pump is sent to the detector through the primary pipe. It may include a; intermittently introduced sample collection step.

According to the intermittent sample collection apparatus and method of the present invention, during the process of moving from the contaminated area to the specific area for sample collection, only the contaminated sample of the specific area is collected while blocking the direct inflow of the contaminated high-concentration noxious gas to the detector By doing so, it is possible to prevent the rapid deterioration of the performance of the detector from the high concentration of harmful gases, and there is an effect that the collected sample can be accurately measured.

1 is a view of an intermittent sampling device according to the present invention before sampling.
2 is a diagram illustrating a state during sampling of the intermittent sampling device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in the present invention are terms defined in consideration of the functions in the present invention, which may vary depending on the intention or custom of the user or operator, so the definitions of these terms correspond to the technical matters of the present invention and should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are merely exemplary matters of the components presented in the claims of the present invention, and are included in the technical spirit throughout the specification of the present invention and the scope of the claims. It is an embodiment including a substitutable component as an equivalent in the component.

In addition, optional terms in the examples below are used to distinguish one component from other components, and the components are not limited by the terms.

Accordingly, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

1 and 2 are views showing an intermittent sample collecting device and an operating state thereof according to the present invention.

As shown in FIGS. 1 and 2 , the intermittent sample collection device 100 according to the present invention includes a cyclone 110 and a cyclone 110 for filtering particulate foreign substances contained in the harmful gas by introducing harmful gas from the contaminated area. ), a hollow middle tube 130 connected to one end of the large tube 120 penetratingly, and a hollow element tube 140 connected to one end of the middle tube 130 penetratingly. and a detector 180 provided at one end of the canal 140 .

In addition, the solenoid valve 150 connected to the large pipe 120 and the middle pipe 130 as different ports, the first pump 160 respectively connected to the solenoid valve 150 as two ports, and the first pump One end is connected to 160 and the other end includes a filtering tube 170 connected to the middle tube 130 , and a second pump 190 connected to the detector 180 is further included.

To explain this in more detail, the cyclone 110 filters out foreign substances such as particulate foreign substances, ie, dust, mixed in the incoming harmful gas.

One end, that is, the front end of the large tube 120 is connected in communication with the cyclone 110, and the middle tube 130 is connected to the other end, that is, the rear end in communication with the large tube 120. At the rear end of the large tube 120, a solenoid valve ( An outlet 121 connected to one port of 150 is formed.

And, the middle tube 130 is connected in communication with its front end passing through the rear end of the large tube 120, and the rear end protrudes to the outside of the large tube 120 to communicate with the elementary tube 140, and the middle tube ( An outlet 131 and an inlet 132 respectively connected to the other port of the solenoid valve 150 and the filtering tube 170 are formed in the middle and rear ends of the 130).

The primary tube 140 is connected in communication with its front end penetrating the rear end of the middle tube 130 , and the rear end protrudes to the outside of the middle tube 130 to be connected to the detector 180 .

On the other hand, the solenoid valve 150 has two inlet ports to which the outlets 121 and 131 of the large pipe 120 and the middle pipe 130 are respectively connected, and two outlet ports connected to the first pump 160 are formed. do.

In addition, in the inlet port on one side of the solenoid valve 150 connected to the outlet 121 of the large pipe 120, the first valve in which the harmful gas through the outlet 121 of the large pipe 120 flows toward the solenoid valve 150 side. 151 is provided, and at the outlet port of the other side of the solenoid valve 150 opposite the first valve 151, gas through the outlet 131 of the middle pipe 130 is transferred from the solenoid valve 150 to the first pump 160 A second valve 152 to flow to the side is provided.

These first and second valves 151 and 152 are provided separately as each inlet port and each outlet port of the solenoid valve 150 are connected in parallel in the normal state before the operation of the solenoid valve 150, and the solenoid valve When the 150 is operated, each inlet port and each outlet port of the solenoid valve 150 are crossed in a "X" shape to connect the first and second valves 151 and 152 to each other.

As such, as the first and second valves 151 and 152 are separated or connected, the air curtain 133 is formed or released at the front end of the middle tube 130 provided in the main tube 120 , that is, the inlet portion.

That is, when the sample is not collected, as shown in FIG. 1 , the solenoid valve 150 is not operated, and the first and second valves 151 and 152 are separately provided, and in this state, the 1 The harmful gas introduced into the tube 120 by the suction force of the pump 160 is sucked into the first pump 160 through the first valve 151 and is supplied to the filtering tube 170 to remove impurities. As purified gas, it is supplied to the inlet 132 of the middle pipe 130 through the third valve 171 , and the purified gas supplied into the middle pipe 130 is supplied to the middle pipe 130 by the discharge pressure of the first pump 160 . As it flows from the rear end to the front end of the middle tube 130, it collides with the harmful gas introduced into the large tube 120 from the front end (inlet portion) of the middle tube 130 to form an air curtain 133 that does not flow and is stagnant.

Accordingly, by preventing the harmful gas flowing into the large pipe 120 from directly flowing into the primary pipe 140 and preventing unnecessary exposure of the detector 180 prior to sample collection, the detector 180 is prevented from being contaminated by a high concentration of harmful gas. will protect

Meanwhile, at the time of sample collection, as shown in FIG. 2 , the solenoid valve 150 is operated, and the internal flow path of the solenoid valve 150 is switched so that the first and second valves 151 and 152 are connected. provided, and in this state, the purified gas supplied to the middle pipe 130 is directly sucked into the first pump 160 through the flow path of the solenoid valve 150 without a valve by the suction force of the first pump 160, and the filtering tube By having a circulation structure supplied to 170 and the middle tube 130 , the air curtain 133 formed at the front end (inlet portion) of the middle tube 130 is automatically extinguished and released.

In addition, the first and second valves 151 and 152 on the same flow path are respectively opened by the suction force of the first pump 160, and in this case, the second valve 152 to which the suction force of the first pump 160 directly acts. Since the opening amount of the first valve 151 acting through the second valve 152, that is, the opened flow path is small, the harmful that flows into the first pump 160 through the outlet 121 of the large pipe 120 The gas flow is introduced in a smaller amount than when no sample is taken.

As a result, most of the harmful gases introduced into the main tube 120 flow inside the main tube 120 , and through the middle tube 130 and the primary tube 140 by the operation of the second pump 190 to the detector 180 . imported and harvested.

The first and second valves 151 and 152 are valves that are opened in the same direction by the suction force of the first pump 160, and in a preferred embodiment of the first and second valves 151 and 152, one-way A check valve that is opened only as an example may be given as an example, but the first and second valves 151 and 152 are not limited thereto.

The filtering tube 170 is an adsorption tube provided to be connected to the discharge part of the first pump 160, and various kinds of adsorption materials capable of filtering (purifying) impurities contained in the gas may be provided therein. .

As a result, in the process in which the harmful gas introduced by the first pump 160 passes through the filtering tube 170 , impurities are converted into the filtered purified gas, and the clean purified gas purified in this way is transferred to the inlet ( 132) through the middle pipe 130 is discharged and supplied.

In addition, the inlet 132 of the middle pipe 130 is provided with a third valve 171 that is opened by the pumping force (discharge pressure) of the first pump 160 , and the third valve 171 is the filtering tube 170 . ) as a valve that is opened to supply the purified gas discharged from the middle pipe 130, this may also be provided as a check valve that is opened only in one direction.

On the other hand, a fourth valve 181 is provided in the flow path between the detector 180 and the second pump 190 , and the fourth valve 181 is opened by the suction force of the second pump 190 and the tube 120 is opened. It may be provided as a check valve so that the harmful gas introduced into the air can be sucked into the detector 180 through the canal 140 and collected.

The second pump 190 may be provided to operate only when a sample is collected by the detector 180 , and the first pump 160 operates like the sample collecting device 100 regardless of whether a sample is collected or not. and may be provided stationary.

On the other hand, in the sample collection method using the sample collection device 100 as described above, the harmful gas from the contaminated area is introduced into the pipe 120 by the first pump 160 , and the first valve 151 and the first pump As it passes through 160 and the filtering tube 170, it is converted into purified gas, and this stagnant gas is supplied to the middle tube 130 and collides with the harmful gas at the tip (inlet portion) of the middle tube 130 to air curtain 133. A sample inflow blocking step of blocking the inflow of harmful gas into the tube 140 by forming a , and the first and second pumps ( 160 and 190 are driven, and harmful gases from the contaminated area are introduced into the main pipe 120 by the first pump 160 to connect the first valve 151, the second valve 152 and the filtering tube 170. It is converted into purified gas as it passes, and this purified gas is supplied to the middle pipe 130 and sucked by the first pump 160 and circulated to the filtering tube 170 to release the air curtain 133 and at the same time to release the second pump ( 190) includes a sampling step in which the harmful gas introduced into the tube 120 is intermittently introduced into the detector 180 through the tube 140.

A sample collection process using the sample collection device according to the present invention as described above will be described.

On the other hand, the sample collection device 100 of the present invention has a running function that can collect a sample of a specific area, that is, noxious gas while moving the contaminated area.

That is, before sample collection, as shown in FIG. 1, each inlet port and each outlet port of the solenoid valve 150 form an "11" free path connected in parallel, so that the first and second valves 151 and 152 are formed. is moved to the contaminated area in a separated state, at this time the first pump 160 is operated.

Accordingly, in the sample collecting device 100 moving in the contaminated area, the first and second valves 151 and 152 are opened to the same opening degree by the suction force of the first pump 160, respectively, and the high concentration in the contaminated area Noxious gas is introduced into the large pipe 120 through the cyclone 110 .

At this time, as the harmful gas flowing into the large tube 120 passes through the cyclone 110 , all particulate foreign substances included in the harmful gas are filtered out, and the noxious gas from which the foreign material is filtered is removed from the front end of the middle tube 130 in the large tube 120 . Due to the air curtain 133 formed at the (inlet part), it cannot flow into the middle pipe 130 and the primary pipe 140 , but is discharged through the outlet 121 of the large pipe 120 .

Noxious gas discharged to the outlet 121 of the large pipe 120 passes through the open first valve 151 and the solenoid valve 150 and flows into the first pump 160, which is again fed to the first pump 160. It is introduced into the filtering tube 170 and discharged as purified gas from which impurities contained in the harmful gas are removed, so that the first pump 160 is operated and the third opened like the first and second valves 151 and 152 . It flows into the inlet 132 of the middle pipe 130 through the valve 171 .

The purified gas flowing into the inlet 132 of the middle tube 130 flows from the rear end of the middle tube 130 to the front end by the pumping force, that is, the discharge pressure of the first pump 160, and the front end (inlet portion) of the middle tube 130 . It collides with the noxious gas introduced into the duct 120 in the air to form a stagnant air curtain 133 without flowing the gas.

Of course, at this time, some of the purified gas may be discharged to the first pump 160 through the outlet 131 of the middle pipe 130 by the opened second valve 152 , but compared to the diameter of the middle pipe 130 , the outlet Since the diameter of 131 is very small, the flow rate of the purified gas discharged through the outlet 131 is insufficient, and most of the purified gas is supplied to the tip (inlet) side of the middle pipe 130 to form the air curtain 133 will do

In this process, even if some of the purified gas is introduced into the element pipe 140 and supplied to the detector 180, only pure gas with a concentration of “0” from which particulate foreign substances and impurities have been removed flows in, so there is no effect on the detector 180. will not reach

Thereafter, when the sample collection device 100 reaches a specific contaminated area and collects a sample (noxious gas) from the specific area, as shown in FIG. 2 , the solenoid valve 150 is operated and the solenoid valve 150 . Since each inlet port and each outlet port of 'X' form a crossed flow path, the first and second valves 151 and 152 are connected to one flow path, and the second pump 190 is starts to run

Then, some of the harmful gas introduced into the main tube 120 is introduced into the first pump 160 through the outlet 121 of the main tube 120 and the first and second valves 151 and 152, which are filtered again The flow path of the solenoid valve 150 without a valve by the suction force of the first pump 160 although it flows into the tube 170 and is purified into purified gas, passes through the third valve 171 and flows into the middle tube 130 . Since it is directly sucked into the first pump 160 and circulated through the air curtain 133 formed at the tip (inlet portion) of the middle tube 130 is automatically extinguished and released.

On the other hand, the noxious gas flowing into the first pump 160 through the first and second valves 151 and 152 among the noxious gas of the large pipe 120 is an insignificant flow rate, and most of the noxious gas is the second pump 190 . It flows into the elementary pipe 140 through the tip (inlet part) of the middle pipe 130 without any resistance by the suction force of the.

Accordingly, the noxious gas introduced into the canal 140 is delivered to the detector 180 through the opened fourth valve 181, and the detector 180 collects a high-concentration noxious gas in a specific area where a sample is to be collected. will measure

Therefore, the sample collection device 100 of the present invention safely protects the detector 190 from a high concentration of noxious gas until the sample is collected, and intermittently collects the high concentration noxious gas by introducing the high concentration of the noxious gas into the detector 190 only during sample collection. By the sampling method, unnecessary contamination of the detector 180 can be blocked to prevent performance degradation, and accordingly, the concentration of the sample can be measured more accurately.

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto. It is clear that the modification or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims.

100: collecting device 110: cyclone
120: Daegwan 121: outlet
130: middle tube 131: outlet
132: inlet 133: air curtain
140: master pipe 150: solenoid valve
151: first valve 152: second valve
160: first pump 170: filtering tube
171: third valve 180: detector
181: fourth valve 190: second pump

Claims (4)

a cyclone that filters out particulate foreign substances contained in the harmful gas by introducing harmful gas from the polluted area;
a solenoid valve connected to a cyclone and a large pipe while a middle pipe provided to pass through the large pipe is connected to a port different from the large pipe;
a first pump connected to the solenoid valve as a plurality of ports to suck gas flowing through the large pipe and the middle pipe, respectively, to the solenoid valve;
a filtering tube connected to the first pump to purify the harmful gas introduced by the first pump and supply it to the middle pipe;
a detector connected to an element pipe provided to pass through the middle tube to measure noxious gas flowing through the element pipe;
A second pump connected to the detector and sucking the harmful gas to the detector through the tube, including;
An outlet 131 and an inlet 132 respectively connected to the other port of the solenoid valve 150 and the filtering tube 170 are formed in the middle part and the rear end of the middle pipe 130, and the middle part is higher than the rear end. The sample collection device, characterized in that it is located closer to the front end of the air curtain (133) is formed.
The method according to claim 1,
A first valve is provided at the connection between the main pipe and the solenoid valve, and a second valve is provided at the connection between the solenoid valve and the first pump,
A sampling device provided so that the first and second valves are separated or connected by a solenoid valve.
3. The method according to claim 2,
When the 1st and 2nd valves are separated by the solenoid valve, the purified gas purified from the filtering tube is supplied to the large pipe through the middle pipe, and the harmful gas and the purified gas collide at the inlet of the middle pipe to block the inflow of the noxious gas into the main pipe. An air curtain is formed,
When the 1st and 2nd valves are connected by the solenoid valve, the purified gas supplied to the middle pipe is sucked by the first pump and circulated to the filtering tube. Incoming sample collection device.
A sample collection method using the sample collection device of any one of claims 1 to 3, comprising:
Noxious gas from the contaminated area is introduced into the main pipe by the first pump and is converted into purified gas as it passes through the first valve, the first pump, and the filtering tube. a sample inflow blocking step of colliding with and forming an air curtain to block the inflow of harmful gases into the tube;
The solenoid valve operates and the first and second pumps are driven while the first and second valves are connected, and the harmful gas from the contaminated area is introduced into the main pipe by the first pump and passes through the first and second valves and the filtering tube. The purified gas is supplied through the middle pipe, sucked by the first pump, circulated to the filtering tube, and the air curtain is released, and at the same time, the harmful gas introduced into the large pipe by the second pump is sent to the detector through the primary pipe. Sample collection method comprising a; intermittently introduced sample collection step.

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