JP2002174570A - Chemical substance-sampling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact, light, and low-noise chemical substance- sampling device. SOLUTION: The chemical substance-sampling device 1 comprises a vacuum pump 2 having a specific suction capacity, a main flow-rate adjustment means 7 for adjusting suction air flow rate in a pipeline 4 of a filter unit 6, that is connected to a suction port 3 of the vacuum pump 2 and is connected to a tip 5 of the pipeline 4 to optimum flow rate, and metering valves 13a, 13b, and 13c that are connected to the suction port 3 of the vacuum pump 2 with pipelines 8a, 8b, and 8c, and respectively adjust the amounts of suction in the pipelines 8a, 8b, and 8c of cartridges 10 and 11 and a tube 12 connected to tips 9a, 9b, and 9c of the pipelines 8a, 8b, and 8c to optimum amounts of suction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical substance in which, when a plurality of chemical substances existing in the air are collected by a collecting member, all the collecting members can be suctioned by a single vacuum pump. It relates to a sampling device.

[0002]

2. Description of the Related Art A chemical substance collecting apparatus of this kind is provided as an apparatus for collecting various chemical substances existing in the air. This chemical substance sampling device is used for a specified period of time to determine whether or not it meets the environmental standards set by the Environment Agency.
This is a device that collects chemical substances in the air by sucking air.

[0003] The chemical substance collecting apparatus is specifically configured as follows. That is, the collecting member that collects various chemical substances existing in the air is detachably attached to one end (end) of the suction pipe. A flow meter and a flow control valve are provided in the middle of the suction pipe. Further, the other end of the suction pipe is connected to a suction-side connection port of the vacuum pump. Further, the discharge-side connection port of the vacuum pump is connected to the atmosphere via an exhaust pipe and a gas meter.

[0004] The chemical substance collecting apparatus having such a structure needs to be provided by the number of chemical substances to be collected. For example, phthalates, aldehydes,
In the case of collecting four kinds of chemical substances composed of termite and insect repellents and volatile organic compounds, four chemical substance sampling devices are required.

[0005]

As described above, in the case where the number of chemical substance collecting devices provided is the same as the number of chemical substances to be collected, the same number of vacuum pumps (motor integrated type) as the number of chemical substances to be collected are provided. Is required, and there are the following inconveniences.

(1) Since the number of vacuum pumps is the same as the number of chemical substances to be collected, the number of parts increases, and the number of chemical substance sampling devices must be equal to the number of the chemical substances to be collected. Therefore, there is a disadvantage that a large installation area is required. (2) Since as many vacuum pumps as the number of chemical substances to be collected are required, a lot of noise is generated, and it is necessary to take noise countermeasures at the installation place. (3) The same number of chemical substance sampling devices as the number of chemical substances to be collected is required, and the entire apparatus becomes large. (4) Since the same number of chemical substance collecting devices as the number of chemical substances to be collected must be installed, there is an inconvenience that maintenance is troublesome. (5) Since the same number of chemical substance sampling devices as the number of chemical substances to be collected are installed, there is a disadvantage that the detection accuracy of the chemical substance to be collected is different due to a change in the diameter of each device. Was.

[0007] The present invention has been made in view of the above points, and has as its object to provide a chemical substance collecting apparatus that is small and lightweight and has low noise.

[0008]

According to a first aspect of the present invention, there is provided a chemical substance collecting apparatus for collecting a chemical substance present in the air. A vacuum pump having a capacity, and a suction port of the vacuum pump connected to the suction port of the vacuum pump by a pipe, and a suction air flow rate in a pipe of a main collection member connected to a tip of the pipe to the main collection member. Main flow rate adjusting means for adjusting to an optimum flow rate, and a pipe line communicating with the suction port of the vacuum pump, and
A metering valve for adjusting a suction amount in the pipe of another collection member connected to a tip of the pipe to an optimum suction amount for the other collection member. is there. As a result, all the collecting members can be sucked by one vacuum pump, and the size and weight can be reduced, the number of parts can be reduced, the installation area can be reduced, the sound can be reduced, and the maintenance can be performed. It is easy and the detection accuracy can be increased.

According to a second aspect of the present invention, in the chemical substance collecting apparatus of the first aspect, the vacuum pump, the main flow rate adjusting means, and the metering valve are arranged in one housing. Things.

According to a third aspect of the present invention, in the chemical substance collecting apparatus of the first aspect, the vacuum pump is arranged in one case, and the main flow rate adjusting means and the metering valve are arranged in another case. The two housings are connected by a hose.

According to a fourth aspect of the present invention, in the chemical substance collecting apparatus of the first aspect, the main collecting member is a filter unit for collecting phthalic acid esters, and the other collecting members are aldehydes or aldehydes. A cartridge for collecting termite and insect repellents, and a tube for collecting volatile organic compounds.

According to a fifth aspect of the present invention, in the chemical substance collecting apparatus of the first aspect, the main flow rate adjusting means forms a setting unit for setting a flow rate and a control signal for setting the flow rate to the setting unit. A control unit, a flow controller that adjusts the flow rate of the pipeline based on a control signal from the control unit, and a display that displays an actual flow rate provided from the control unit. is there.

According to a sixth aspect of the present invention, in the chemical substance collecting apparatus of the first aspect, a flow monitor is provided in a pipe line to which the other collecting member is connected. .

[0014]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is an overall configuration diagram showing a chemical substance collecting apparatus according to a first embodiment of the present invention. In FIG. 1, a chemical substance collecting device 1 according to an embodiment of the present invention is a device for collecting a chemical substance existing in the air, and is constituted by the following components.

The above-mentioned chemical substance collecting apparatus 1 is connected to a vacuum pump 2 having a predetermined suction capacity and a suction port 3 of the vacuum pump 2 via a pipe 4, and a tip 5 of the pipe 4.
A main flow adjusting means 7 for adjusting the suction air flow rate in the pipe line 4 of the filter unit 6 as a main collecting member connected to the main unit to an optimum flow rate for the filter unit 6 as the main collecting member; Pipe lines 8a, 8b,
8c, and other collection members, such as cartridges 10, 11 and tubes 8a, 8 of the tube 12, which are connected to the distal ends 9a, 9b, 9c of the lines 8a, 8b, 8c.
b, 8c Metering valves 13a, 13b, 13c for adjusting the suction amount to the optimum suction amount for each of the other collecting members, such as cartridges 10, 11 and tube 12.
Is provided. When the vacuum pump 2 starts sucking air, air is sucked in the direction indicated by the arrow in FIG.

More specifically, the vacuum pump 2
Sucks air from the suction port 3 and discharges the air
And a motor unit for driving the pump unit are integrally formed. The motor of the vacuum pump 2 is connected to the terminal block 1 via a power cable 15.
6 are electrically connected. The terminal block 16 is electrically connected to a plug 18 connected to AC 100 [V] of commercial power via a power switch 17.

The main flow rate adjusting means 7 includes a setting unit 71 for setting a flow rate, and a control unit 7 for forming a control signal for setting the flow rate to the setting unit 71.
2, a flow controller 73 for adjusting the flow rate of the pipeline 4 based on a control signal from the control unit 72, and a display 74 for displaying the actual flow rate given from the control unit 72. The setting unit 71 is electrically connected to the control unit 72 by a cable 75. The flow controller 73 is electrically connected to the control unit 72 via a cable 76, and provides a control signal from the control unit 72 to the flow controller 73,
The detected flow signal actually flowing from the flow controller 73 is given to the control unit 72.
The display unit 7 is connected to the control unit 72 via a cable 77.
4 are electrically connected so that the actual flow rate can be displayed. The control unit 72 is electrically connected to the terminal block 16 via the power cable 19.

The suction port 3 of the vacuum pump 2 is
It is connected to the first connection port of the three-way joint 23 via 2-1.

The second connection port of the three-way joint 23 is connected to the outlet connection port of the flow controller 73 of the main flow control means 7 via a pipe 4-1. The inlet-side connection port of the flow rate controller 73 is connected to the outlet-side connection port of the in-line filter 26 via a conduit 4-2. The inlet side connection port of this in-line filter 26 is
It communicates with a flange 28 fixed to a housing (casing) 27 via a conduit 4-3. In addition, one end of the externally mounted pipeline 4-4 is connected to the flange 28 by a connector 29, and the other end (the distal end) of the externally mounted pipeline 4-4.
Numeral 5 allows the filter unit 6 to be attached and detached.

The third connection port of the three-way joint 23 is
It communicates with the first connection port of the four-way joint 24 via 2-2.

The second connection port of the four-way joint 24 is connected to the outlet-side connection port of the metering valve 13a via a pipe 8a-1. This metering valve 13
The inlet-side connection port of a is connected to the outlet-side connection port of the flow monitor 31a via the pipe line 8a-2. The inlet-side connection port of the flow monitor 31a is connected to a flange 32a fixed to the casing 27 via a conduit 8a-3. In addition, one end of the externally mounted pipeline 8a-4 can be connected to the flange 32a by a connector 33a, and the other end (tip) 9a of the externally mounted pipeline 8a-4 allows the cartridge 10 to be attached and detached. ing.

The third connection port of the four-way joint 24 communicates with the outlet-side connection port of the metering valve 13b via a pipe 8b-1. This metering valve 13
The inlet-side connection port of b is communicated with the outlet-side connection port of the flow monitor 31b via the conduit 8b-2. An inlet-side connection port of the flow monitor 31b is connected to a flange 32b fixed to the casing 27 via a conduit 8b-3. In addition, one end of the externally-installed pipeline 8b-4 can be connected to the flange 32b by a connector 33b, and the other end (tip) 9b of the externally-installed pipeline 8b-4 allows the cartridge 11 to be attached and detached. ing.

The fourth connection port of the four-way joint 24 is connected to the outlet-side connection port of the metering valve 13c via a pipe 8c-1. This metering valve 13
The inlet-side connection port of c is connected to the outlet-side connection port of the flow monitor 31c via the conduit 8c-2. The inlet side connection port of the flow monitor 31c communicates with a flange 32c fixed to the casing 27 via a conduit 8c-3. In addition, one end of the externally mounted pipeline 8c-4 can be connected to the flange 32c by a connecting member 33c, and the other end (tip) 9c of the externally mounted pipeline 8c-4 allows the tube 12 to be attached and detached. ing.

Here, the metering valve 13a,
13b and 13c basically have the same function, and by rotating the adjustment knobs 35a, 35b and 35c, the flow rate of air flowing through the valve can be adjusted.

The flow monitors 31a, 31
b and 31c basically have the same function. For example, when a voltage of DC 5 [V] is supplied, the flow rate of air flowing through each monitor is measured and converted into an electric signal. It can be output. That is, each of the flow monitors 31a, 31b, 31c is connected to the output terminal of the DC power supply 37 via the cable 36 so that the DC power supply 37 can receive power of, for example, 5 [V]. Has become. An input terminal of the DC power supply 37 is connected to the terminal block 16 via a power cable 38. Output terminals of the respective flow monitors 31a, 31b, 31c are connected to a terminal block 40 via signal cables 39a, 39b, 39c, respectively.
The detection signals from the respective flow monitors 31a, 31b, 31c can be supplied to the respective digital flow rate indicators (not shown) via the. Thereby, the flow rates from the respective flow monitors 31a, 31b, 31c can be displayed on the three digital flow rate display devices.

The control unit 7 of the main flow rate adjusting means 7
The two signal output terminals are connected to a terminal block 40 via a signal cable 41, and can be connected to a data logger (not shown) via the terminal block 40.

The discharge port 14 of the vacuum pump 2 is
It communicates with the inlet side connection port of the in-line filter 43 via 1-1. The outlet side connection port of the in-line filter 43 is connected to the casing 27 via the exhaust pipe 41-2.
Is connected to an exhaust flange 44 fixed to the outside, so that the exhaust can be discharged to the outside air.

In the first embodiment, the externally mounted pipeline 4-4 and the externally mounted pipelines 8a-4, 8b-4,
Except for the relationship 8c-4, the vacuum pump 2, the main flow rate adjusting means 7, the metering valve 13, and the flow monitor 31
a, 31b, 31c and other predetermined components are shown in FIG.
As shown in FIG. 2, the casing 27 is entirely housed inside.

The filter unit 6 is a collecting means for collecting, for example, phthalic acid esters, for example, 7 to 8 [liter / minute].
This is the optimal suction air flow rate.

The cartridge 10 is a collecting means for collecting, for example, aldehydes, for example, 1.0 [liter / liter].
Is the optimal suction air flow rate for the cartridge 10. The cartridge 11 is a collecting means for collecting, for example, termite and insect repellents. For example, 2.0 [liter / minute] is the optimum suction air flow rate for the cartridge 11. The tube 12 is, for example, a collecting means for collecting a volatile organic compound. For example, 0.1 [liter / minute] is an optimum suction air flow rate for the cartridge 11.

The operation of the chemical substance collecting apparatus 1 will be described with reference to FIG. First, the chemical substance sampling device 1 is installed at a measurement place. Next, the pipe 4-4 is connected to the flange 28.
Pipe 8a-4 to flange 32a, pipe 8b-4 to flange 32b, pipe 8c-4 to flange 32c,
Attach each. Thereafter, the filter unit 6 is disposed at the distal end 5 of the conduit 4-4, the cartridge 10 is disposed at the distal end 9a of the conduit 8a-4, the cartridge 11 is disposed at the distal end 9 of the conduit 8b-4, and the distal end of the conduit 8c-4. The tube 12 is attached to each of the tubes 9c.

Further, the plug 18 is inserted into a commercial power outlet, and the power switch 17 is turned on. As a result, electric power is supplied to the motor section of the vacuum pump 2,
Electric power is supplied to the control unit 72 of the main flow rate adjusting means 7 and the DC power supply 37. Then, the vacuum pump 2 is operated to suck air from the suction port 3. Also, the flow monitors 31a, 31b, 31c are supplied from the DC power supply 37.
Is supplied with a direct current of 5 [V]. The control unit 72
Starts operation.

The control unit 72 controls the suction air flow rate reference value (for example, 7 to 8) set in the setting unit 71.
[Liter / minute]), and supplies the control signal to the flow controller 73. The flow controller 73 is adjusted so that the air flow inside the pipe 4 becomes an air flow according to the control signal. Then, the flow rate of the circulating air inside the pipeline 4 is maintained at, for example, 7 to 8 [liter / minute]. This state is detected by the flow controller 73, converted into a predetermined signal by the control unit 72, and displayed on the display 74.

The flow monitor 31a of the terminal block 40
A digital flow indicator (not shown) is connected to the output signal terminal, and the interior of the pipeline 8a is connected to the cartridge 1 while watching the display value displayed on the digital flow indicator.
0 optimal suction air flow rate (for example, 1.0 [liter /
The adjustment knob 35a of the metering valve 13a is adjusted so as to satisfy [minute]).

Similarly, the flow monitor 31 of the terminal block 40
b, a digital flow indicator (not shown) is connected to the output signal terminal, and the interior of the pipeline 8b is connected to, for example, an optimal suction air flow rate (for the cartridge 11) while viewing the display value displayed on the digital flow indicator. For example, the adjustment knob 35b of the metering valve 13b is adjusted so as to be 2.0 [liter / minute].

Similarly, the flow monitor 31 of the terminal block 40
A digital flow rate indicator (not shown) is connected to the output signal terminal of c, and the inside of the pipe 8c is, for example, an optimal suction air flow rate (for example, the tube 12) while watching the display value displayed on the digital flow rate indicator. , 0.1 [liter / min])
The adjustment knob 35c of the metering valve 13c is adjusted so that

In such a state, the collection of the chemical substance is started, and thereafter, the collection is continued. Since the chemical substance collecting device 1 according to the first embodiment of the present invention is configured as described above and operates as described above,
There are the following advantages.

(1) Regardless of the number of chemical substances to be collected, one vacuum pump 2 is used, so that the number of parts is reduced and the installation area can be reduced. (2) Since there is only one vacuum pump 2 and this vacuum pump 2 is housed in the casing 27, the noise is very low. (3) Since only one vacuum pump 2 is provided, the entire apparatus can be reduced in size and weight even if there are other components. (4) Since the structure is simple, maintenance is easy. (5) The suction air of the collection means is sucked by one vacuum pump 2 and the flow rate of each suction air is individually adjusted to the main flow rate adjustment means
And the metering valves 13a, 13b, 13c, so that the substance detection accuracy can be the same.

[Second Embodiment] FIG. 2 is a configuration diagram showing a chemical substance collecting apparatus according to a second embodiment of the present invention. Chemical substance sampling device 1 according to the second embodiment
a is a vacuum pump 2 and an exhaust pipe 4 as shown in FIG.
1, all the same components as in the first embodiment except for the in-line filter 43 and the power cable 15 are housed in the casing 27, and the vacuum pump 2, the exhaust pipe 41, the in-line filter 43, the power cable 15, and other necessary components The components are housed in another casing (casing) 50, and a hose 5 is connected between the casing 27 and the casing 50.
It is made possible to communicate with one.

Therefore, also in the chemical substance collecting apparatus 1a according to the second embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the description of the same configuration is omitted.

To explain further, the casing 27 of the chemical substance collecting apparatus 1a according to the second embodiment of the present invention.
On the side, the first connection port of the three-way joint 23 is
Hose connector 5 fixed to casing 27 via -1
2 and the vacuum pump 2 and the vacuum pump 2
The first embodiment differs from the first embodiment in that there are no members related to the first embodiment, and all other components house the same components as in the first embodiment. Further, the casing 50 of the chemical substance collecting apparatus 1a according to the second embodiment of the present invention has the following configuration. That is, the casing 50
Is connected to the suction port 3 of the vacuum pump 2 via a suction pipe 54. The discharge port 14 of the vacuum pump 2 is connected to the inlet-side connection port of the in-line filter 43 via the exhaust pipe 41-1.
The outlet side connection port of the in-line filter 43 communicates with an exhaust flange 55 fixed to the casing 50 via an exhaust pipe 41-2 so that the exhaust can be discharged to the outside air. The motor of the vacuum pump 2 is electrically connected to a terminal block 56 via a power cable 15. The terminal block 56 is electrically connected via a power switch 57 to a plug 58 connected to AC 100 [V] of commercial power.

Further, hose connectors 60 and 61 are fixed to both ends of the hose 51. Such a second embodiment is used as follows. First, the casing 27 of the chemical substance collecting apparatus 1a is installed at the place where the measurement is to be performed, and the casing 50 of the chemical substance collecting apparatus 1a is installed at a place free from noise. Connect the hose connector 61 of the hose 51 to the hose connector 52 of the casing 27 and
The installation is completed by connecting to the hose connector 53 of No. 0.

Next, the plugs 18 and 58 are plugged into the outlets of the commercial power source, and the power switches 17 and 57 are turned on, whereby the vacuum pump 2 inside the casing 50 is operated. Road 22-1,
Pipe lines 4 connected to the three-way joint 23 and the four-way joint 24,
The air in 8a, 8b, 8c is sucked. Thereafter, the operation is performed in the same manner as in the first embodiment.

According to the second embodiment, the same operation and effect as those of the first embodiment can be obtained, and since two casings are used, transportation becomes easy.

Further, according to the second embodiment, noise countermeasures are further facilitated. Although both the first embodiment and the second embodiment have been described with an example in which four collection means are provided and one vacuum pump is used to suction air, the invention is not limited to this. It may have two or more collecting means and suction air with one vacuum pump.

[0046]

As described above, according to the present invention, a vacuum pump having a predetermined suction capacity is connected to a suction port of the vacuum pump by a pipe, and is connected to a tip of the pipe. A main flow rate adjusting means for adjusting a suction air flow rate in a pipe of the main collection member to an optimum flow rate for the main collection member, and a pipe connected to a suction port of the vacuum pump, and The provision of the metering valve for adjusting the suction amount in the conduit of the other collection member connected to the distal end to the optimum suction amount for the other collection member has the following effects.

(1) Regardless of the number of chemical substances to be collected, one vacuum pump is used, so that the number of parts is reduced and the installation area can be reduced. (2) Since there is only one vacuum pump and this vacuum pump is housed in the casing, the noise is very low. (3) Since there is only one vacuum pump, the entire apparatus can be reduced in size and weight even if there are other components. (4) Since the structure is simple, maintenance is easy. (5) Since the suction air of the collecting means is sucked by one vacuum pump and the flow rate of each suction air is individually adjusted by the main flow rate adjusting means and the metering valve, the detection accuracy of the substance is the same. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a chemical substance collecting apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a chemical substance collecting apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 1a Chemical substance collecting device 2 Vacuum pump 4 Pipe line 5 Tip 6 Filter unit (main collecting means) 7 Main flow rate adjusting means 8, 8a, 8b, 8c Pipe line 9, 9a, 9b, 9c Tip 10, 11, Cartridge (Other collecting means) 12 Tube (Other collecting means) 13 Metering valve 16, 40, 56 Terminal block 17, 57 Power switch 18, 58 Plug 23 Three-way joint 24 Four-way joint 27, 50 Casing (housing) 26 In-line filter 31a, 31b, 31c Flow monitor 35a, 35b, 35c Adjustment knob 41 Exhaust line 50 Casing 51 Hose 52, 53, 60, 61 Hose connection tool 71 Setting unit 72 Control unit 73 Flow controller 74 Display

Claims (6)

[Claims] 1. A chemical substance collecting apparatus for collecting a chemical substance present in air, comprising: a vacuum pump having a predetermined suction capacity; and a pipe connected to a suction port of the vacuum pump. Main flow rate adjusting means for adjusting the suction air flow rate in the pipe of the main collection member connected to the tip to an optimum flow rate for the main collection member, and communicating with the suction port of the vacuum pump by a pipe, and A metering valve for adjusting the amount of suction in the conduit of another collecting member connected to the end of the conduit to an optimal amount of suction for the other collecting member. Material sampling device. 2. The vacuum pump, main flow rate adjusting means,
2. The chemical substance collecting apparatus according to claim 1, wherein the metering valve is arranged in one housing. 3. The apparatus according to claim 2, wherein the vacuum pump is arranged in one case, the main flow rate adjusting means and the metering valve are arranged in another case, and the two cases are connected by a hose. The chemical substance sampling device according to claim 1. 4. The main collecting member is a filter unit for collecting phthalates, and the other collecting members are:
Cartridge for collecting aldehydes and termite and insect repellents
The chemical substance collecting device according to claim 1, wherein the chemical substance collecting device is a tube for collecting a volatile organic compound. 5. The main flow rate adjusting means includes a setting unit for setting a flow rate, a control unit for forming a control signal for setting a flow rate set in the setting unit, and a pipe based on a control signal from the control unit. 2. The chemical substance collecting apparatus according to claim 1, further comprising a flow controller for adjusting a flow rate of the road, and a display for displaying an actual flow rate provided from the control unit. 6. The chemical substance collecting apparatus according to claim 1, wherein a flow monitor is provided in a pipe to which the other collecting member is connected.