JPH03269337A - Dust sampling device - Google Patents

Abstract

PURPOSE:To rapidly collect dust in gas from plural positions by arranging filter paper for collecting dust in gas in an airtight container and arranging plural airtight containers in the vertical direction to draw them to the outside of a casing body. CONSTITUTION:Each of plural airtight containers 33 arranged in the casing body 34 in the vertical direction stores gas guide barrels 11, 24 and filter paper 16 in its inside and is formed so as to be optionally drawn out to the front of the casing body 34. The gas inlet 33a of each container 33 is connected to a gas flow inlet 7 in each container 33 and the inlet 7 is connected to a corresponding sampling point 1. An operation console for winding up the filter paper 16 around a winding spindle 18 from the front of the case body 34 is arranged. When a suction pump 21 is driven in above constitution, environmental air is simultaneously sucked from all the sampling points 1 and dust is collected to the filter paper 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention collects dust in the environmental aerodynamics at each of a large number of sampling points placed in a nuclear facility and a wide area around the same, and collects the dust. A dust sampling device is used as a dust collection device such as that used in equipment that monitors radioactive substances contained in The present invention relates to a device that is easy to use and does not take up a large amount of floor space.

[Conventional technology]

FIG. 3 is an explanatory diagram of the configuration of a conventional dust sampling device 28, and FIG. 4 is a perspective external view of the dust sampler 5 shown in FIG.

Now, in Figures 3 and 4, 1 is a plurality of sampling points fixedly arranged over a wide area, each of which serves as an inlet for environmental air, and 2 is a valve inlet provided at each sampling point l. 2a are the same number of two-way solenoid valves as the sampling points 1 connected to the corresponding sampling points 1 via piping 3; 4 are the valve outlets 2 of each solenoid valve 2;
A piping mechanism that connects b to a gas port 9a provided in an airtight container 9 that collectively constitutes the dust sun 1-5.
8 is the solenoid valve 21 selected by this operation 90 when a valve selection operation 90 is applied to select any one of the solenoid valves 2 in the list. : This is a sampling point switching device that applies a valve opening signal 8a to perform a valve opening operation. In this case, the switching device 8 outputs the opening signal 8a to which the operation 90 is applied, and the solenoid valve 2 performs the valve opening operation by the amount to which the signal 8a is input, but when the signal 8a disappears. It is designed to open the valve.

Reference numeral 9 denotes a rectangular parallelepiped airtight container provided with the aforementioned gas population 9a and gas outlet 9b, and reference numeral 11 denotes a cylindrical radiation detector 12 fixed by means not shown inside the container 9.
One end 11a is fixed to the radiation entrance surface 12a of the pipe 1, and a through hole 11b provided in the side wall near the one end 11a is connected to the pipe 1.
The cylindrical first gas guide tube 14 with both ends open and connected to the gas inlet 9aVc by the gas inlet 9aVc is in the container 9, with the cylindrical open end formed at one end facing the other end 11C of the guide tube 11 with a gap 15 in between. The other end is the gas outlet 9.
A second gas guide tube connected to b, in this case, guide tube 1
4 is formed so as to efficiently guide the gas flowing out from the other end 11C of the guide tube 11 to the gas outlet 9blC by means described later. 16 is.

Inside the container 9, a roll of filter paper is attached to the shaft 17 and wound onto the winding shaft 18 through the gap 15, and this filter paper 16 flows out from the guide tube 11 and into the guide tube 14. The filter paper 16 is placed in the gap 15 so as to block the inflow of the above-mentioned gas, thereby collecting dust in the gas. The film can be wound onto the winding shaft 18 from the outside via means not shown.

Reference numeral 19 indicates a flow rate indicator for monitoring the flow rate of gas passing through, and 20 indicates a gas outlet 9b of the airtight container 9 to the gas suction port 2La of the gas suction pump 21 via the flow indicator 19. Piping to be connected, 2
2 is a pressure indicator that indicates the pressure inside the pipe 20 near the gas suction port 21a, and 23 has one end connected to the flow rate indicator 1.
This branch pipe is connected to the pipe 20 on the downstream side of the pipe 9, and the other end thereof is connected to an air intake port 26vc which takes in air from the housing 6 via a flow rate regulating valve 24 and a filter 25. Here, the 2-filter 25 is provided to remove dust from the air flowing into the branch pipe 23 from the intake port 26, and the flow rate adjustment valve 24 is provided to remove dust from the air flowing into the branch pipe 23 from the air intake port 26 when the suction pump 21 operates. tube 23
The R amount of air flowing into the pipe 20VC via this valve 24
It is provided so that the flow rate of gas flowing through the flow rate indicator 19 becomes a predetermined value by adjusting the flow rate by adjusting the pump 21 and operating the pump 21. 27 is the suction pump 21
This is a gas outlet provided in the rectangular parallelepiped case 6 so as to discharge the gas sucked in to the outside of the box case 6. Flow rate and pressure indicator19.
22, pump 21, valve 24, filter 25, and air intake port 26 are all housed in the housing 6, and
The above-mentioned airtight container 9 is stacked on top of this housing 6,
The housing 6 and the container 9 are fixed by means not shown.

The above-mentioned dust sampler 5 is composed of an airtight container 9, the contents of this container 9, the casing 6, and the contents of this casing 6, and the above-mentioned dust sampling device 28 is composed of the above-mentioned parts. It is configured.

Hereinafter, the non-tight container 9 and the contents stored in this container 9 may be collectively referred to as the airtight container 9.

In FIG. 4, reference numeral 29 denotes a conducting wire penetration mechanism for airtightly penetrating the conducting wire 30 from the outside of the airtight container 9 to the radiation detector 12 through the wall of the airtight container 9, and 31 refers to the front surface 6a of the housing 6.
In this case, by performing predetermined operations on the operation panel 31, the pump 21 is started and stopped, and the winding shaft 16 is wound onto the winding shaft 18 from the front surface 6a of the housing 6. The operation panel is configured so as to be able to perform the following operations. Then, the aforementioned flow rate indicator 19 and pressure indicator 22. The flow rate adjustment valve 24 has an instruction section 198.22a of the indicator 19.22 and a valve opening operation section of the valve 24 so that the valve opening can be controlled by reading the instruction from the front surface 6a of the housing 6. 24a is attached within the housing 6 so as to be exposed on the front surface 6a of the housing. In addition, the fourth
9C shown in the figure is a lid detachably formed as a part of the wall of the airtight container 9 in order to enable maintenance work on the inside of the airtight container 9 such as replacing the filter paper 16.

[Problem to be solved by the invention]

Since the dust sampling device 28 is configured as described above, the gas suction pump 21 is operated by performing a predetermined operation on the operation panel 311C.

And one desired solenoid valve 2 is connected to the sampling point switching device 8.
When a valve opening signal 8a is output from the switching device 8 to the solenoid valve 2 selected by the operation 90 by applying a valve selection operation 90 to select the valve, the valve opening signal 8a is outputted from the switching device 8 to the solenoid valve 2 that has performed the valve opening operation. Ambient air is drawn into the pipe 3 from the sampling point 1 connected to the pipe 3 through the pipe 3, and this air sucked into the pipe 3 is then passed through the solenoid valve 2. Piping mechanism 4. Airtight container9. Flow rate indicator 19. The pipe 20° flows through the pump 21 in sequence and is discharged from the gas outlet 27 of the housing 6 to the outside of the housing 6, and at this time, the dust in the air is collected by the filter paper 16Vc in the airtight container 9 as described above. The radioactive substances in the collected dust are detected by the radiation detector 12IC.

Therefore, according to the dust sampling device 28, by selecting the solenoid valve 2 which is opened by the valve selection operation 90, dust in the environmental air at an arbitrary sampling point l is sampled, and the dust in the sampled dust is sampled. This means that the state of radioactive substances can be monitored.

Now, according to the dust sampling device 28, it is possible to collect dust in the environmental air around each of the sampling points 1 at multiple locations as described above. In the case of the sampling device 28,
Piping 3 by sampling point switching device 8 and solenoid valve 2
It is clear that it is not possible to simultaneously collect dust from multiple locations. There is a problem that dust cannot be collected quickly.

An object of the present invention is to enable rapid collection of dust in gas from multiple locations.

[Force means to solve problems]

To achieve the above object, according to the present invention, a plurality of airtight containers each having a gas inlet and a gas outlet so that gas flows through the airtight containers, one gas suction pump, and A piping mechanism that collectively connects each of the gas outlets to a gas suction port of the gas suction pump, and a housing housing at least the gas suction pump, the piping mechanism, and all of the airtight containers, A dust sampling device that sucks the gas through the airtight container and the piping mechanism with a gas suction pump and collects dust in the gas sucked into each of the gas inlets of the airtight container. At least a filter paper is provided in the airtight container to collect the dust contained in at least a portion of the gas flowing through the airtight container.

Further, the dust sampling device is configured such that all the two airtight containers are arranged in the vertical direction and are each formed to be able to be pulled out from the housing.

[Effect]

With the above configuration, the gas introduced into the gas inlet of each airtight container is made to flow through all the airtight containers simultaneously through the operation of the gas suction pump. Since the filter paper collects the dust in the gas flowing through, by placing the gas inlet of each airtight container at a different location for each airtight container, the dust in the gas can be quickly collected from multiple locations.

-10- [Example] Fig. 1 is an explanatory diagram of the configuration of a dust sampling device 32 as an embodiment of the present invention, and Fig. 2 is an explanatory diagram of a sampling device main body portion 40 constituting a guest sampling device M32. FIG. 2 is a perspective external view showing a state in which one airtight container 33 in the device main body 40 is pulled out to the front of the main body 40. As shown in FIG. Thus, in FIGS. 1 and 2, the same parts as in FIGS. 3 and 4 are designated by the same reference numerals as in FIGS. 3 and 4.

Now, in FIGS. 1 and 2, 34 is a rectangular parallelepiped-shaped housing that houses a plurality of the above-mentioned airtight containers 33 arranged vertically, and in this case, the airtight containers 33 are similar to the airtight containers 9 described above. Similarly, the container 33 is formed into a rectangular parallelepiped shape in which a gas inlet 33a corresponding to the gas population 9a and a gas outlet 33b corresponding to the gas outlet 9b are provided, and the inside of this container 33 has a structure similar to that of the two airtight containers 9. gas guide tubes 11 and 14, radiation detector 12. Filter paper 16. In addition to accommodating the pipes 17 and 18, and a pipe 13 whose one end is connected to the gas inlet 33a and the other end is connected to the through hole 11b of the gas guide tube 11, the pipe 13 shown in FIG. As shown, it is formed on the front surface 34a side of the casing 34 so that it can be freely drawn out. Then, the gas population 33a of each airtight container 33 is connected to the housing 3 for each airtight container 33 via the piping 10.
4, and this gas inflow lower is connected via a pipe 3 to a corresponding sampling point IK. Reference numeral 35 denotes a unit dust collecting mechanism consisting of an airtight container 33, a gas inlet 33g, a gas outlet 33b, and the contents of the container 33 described above.

36 is provided for each unit dust collection mechanism 35, one end is connected to the gas outlet 33b of the airtight container 33, and the above-mentioned flow rate indicator 19 is provided midway, and on the downstream side of this indicator 19, The piping 20V in FIG. 3 is provided with a flow rate adjustment mechanism 37 consisting of the branch pipe 23, flow rate adjustment valve 24, filter 25, and air intake port 26 described above.
c corresponding piping; 38 is a piping assembly mechanism in which the other ends of all the piping 36 are collectively connected to the gas suction port 21aVc of the gas suction pump 21; and 39 is a piping mechanism consisting of all the piping 36 and the piping assembly mechanism 38; In this case, in addition to all the unit dust collection mechanisms 35 mentioned above and the piping 10 connected to each of these mechanisms 35, all the flow rate indicators 19, flow rate adjustment mechanisms 37, piping mechanisms 39, and pumps 21 are installed in the housing 34. It is accommodated.

Reference numeral 41 shown in FIG. 2 is provided for each unit dust collection mechanism 35 on the front surface 348 of the casing on the side of the corresponding unit dust collection mechanism 35, and is used to wind up the filter paper 16 in the corresponding unit dust collection mechanism 35. The winding onto the shaft 18 is carried out at the front of the housing 34.
This operation panel corresponds to the operation panel 31 described above and can be operated from the side a, and the operation panel 41 is attached to the front surface 348 of the housing 34 as described above.
Furthermore, for each dust collection mechanism 35, an indicator 19a of a flow rate indicator 19 that indicates the gas flow rate flowing through the dust collection mechanism 35 and this indicator are provided on the front surface 34a of the casing on the side of the dust collection mechanism 35. The indicator 19 and the regulating valve 24 are installed in the housing 34 so that the valve opening operating portion 24a of the flow regulating valve 24 corresponding to the indicator 19 is exposed. The sampling device main body 40 described above is composed of a casing 34 to which a gas inflow lower, a gas outlet 27, and an operation panel 41 are attached, and each of the above-mentioned parts housed within the casing 34. The dust sampling device 32 described above is composed of a sampling device main body 40, a pipe 3, and a sampling point 1.

Since the dust sampling device 32 is configured as described above, when the suction pump 21 is operated, 1'ml of ambient air is suctioned from all the sampling points 1 at once, and this suctioned air is transferred to each airtight container 33. After passing through the gas, the gas is discharged from the casing 34 from the gas outlet 27, and at this time, dust in the flow-through air is collected on the filter paper 16 in the airtight container 33. Therefore, this dust sampling device 32
According to VC, dust in the environmental air from multiple locations can be collected simultaneously by each dust collecting mechanism 35, so that dust in the environmental air can be quickly collected from multiple different locations. .

14- In the above embodiment, the radiation detector 12 was provided inside the airtight container 33, but the present invention does not necessarily require such a radiation detector 12 to be installed inside the airtight container 33. 1. In the present invention, the flow rate indicator 19 and flow rate adjustment mechanism 37 described above may be omitted depending on the case. Further, although the above-described embodiments were for collecting dust in the ambient air, it is obvious that the present invention is applicable to gases other than air as well.

〔Effect of the invention〕

As described above, the present invention includes a plurality of airtight containers each having a gas inlet and a gas outlet so that gas flows therethrough, and one gas suction pump.

A piping mechanism that collectively connects each gas outlet in all the airtight containers to 9M for gas intake.

A housing that houses at least the gas suction pump, the piping mechanism, and all the airtight containers.

A dust sampling device that sucks gas through an airtight container and piping mechanism using a gas suction pump and collects dust in the gas sucked into each gas inlet of the airtight container. At least a filter paper is provided to collect dust in at least a part of the gas flowing through the container, and all the airtight containers are arranged vertically and can be pulled out from the housing. The dust sampling device was configured as follows.

Therefore, with the above configuration, the gas guided to the gas inlet of each airtight container is made to flow through all the airtight containers simultaneously through the operation of the gas suction pump. According to the present invention, the gas is sucked and guided from a different point for each airtight container to the gas inlet of each airtight container.2 The above-mentioned sampling point 1 by connecting a gas sampling mechanism such as that consisting of and piping 3.

This has the effect of allowing dust in gas to be collected from multiple locations in a short time.

In addition, with the above configuration, the floor space occupied by the housing can be reduced compared to when all the airtight containers are arranged horizontally, so the occupied floor space is not large. This has the advantage of providing a dust sampling device, and in addition, with the configuration described in 2 above, maintenance work on the inside of the airtight container, such as replacing filter paper, can be performed extremely easily by pulling the airtight container out of the housing. Therefore, there is an effect that dust sampling IT that is easy to maintain can be obtained.

[Brief explanation of drawings]

Fig. 1 is a diagram illustrating the configuration of an embodiment of the present invention.
FIG. 3 is a perspective external view of the main parts in the figure. FIG. 3 is an explanatory diagram of the configuration of a conventional dust sampling device. FIG. 4 is a perspective external view of the main parts in FIG. 3. 4.39... Piping mechanism, 6.34...
Housing, 9.33... Airtight container, 9a, 33a...
...Gas inlet, 9b, 33b.../Gas outlet, 16...Filter paper, 21...Gas suction port. 21a...Gas suction port, 28.32...
・Dust summing device. 18

Claims (1)

[Claims] 1) A plurality of airtight containers provided with a gas inlet and a gas outlet so that gas flows through them, and one gas suction pump;
a piping mechanism that collectively connects the gas outlets of all of the airtight containers to the gas suction port of the gas suction pump; and a housing that accommodates at least the gas suction pump, the piping mechanism, and all of the airtight containers. a dust collector for collecting dust in the gas sucked into each gas inlet of the airtight container by sucking the gas through the airtight container and the piping mechanism by the gas suction pump; In the sampling device, at least a filter paper is provided in the airtight container to collect the dust in at least a part of the gas flowing through the airtight container; A dust sampling device characterized in that the airtight containers are arranged in the vertical direction and are each formed to be able to be drawn out from the housing.