JPS6020694B2 - Suspended particulate matter collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for collecting particulate matter such as dust floating in the atmosphere.

When measuring dust floating in the atmosphere or analyzing its components, it is necessary to collect the dust by some means. Conventionally known methods for collecting such dust include:
There is a method in which air is sucked in by a pump through a piece of paper attached to a holder, and then dust is collected on the paper, but this method is difficult to compare because the paper must be replaced each time a sample is collected. In cases where a large number of small samples are required continuously, it not only requires replacing the paper more frequently, but also makes it impossible to handle continuous sample collection. There is also a winding type that winds up the paper and unwinds it one after another, but it requires the tensile strength of the monkey paper to withstand the tension during unwinding, and it also requires space for the drum and unwinding mechanism, so it is not compact. It is not possible to have a simple configuration.

The present invention aims to provide a sampling device that can reliably collect dust with a simple configuration and can also easily detect temporal changes in dust concentration and components. A tape-like paper is attached to a cylindrical holder having an inlet in the circumferential direction, and a suction nozzle for sucking air through the inlet is arranged inside the holder so as to be relatively movable in the circumferential direction. It is characterized by the fact that it has been established.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figs. 1 and 2 show the appearance of the device of the present invention. It consists of a suction section 2 and a control section 3.

In the collection section 1, a plywood 7 is attached to a support tube 5 erected on the body 4, and an airtight cover 8 is attached on the plywood 7 to form a camphor collection chamber 6. It is configured by letting the atmosphere pass through a cyclone 9 for removing coarse particles (10 meters or more) such as, and by disposing a dust collector 10 inside the bottle collection chamber 6. . As shown in detail in FIGS. 3 and 4, this collector IQ is equipped with an air inlet 14 in the circumferential direction at the upper end of a middle cylinder 11 provided coaxially inside the support cylinder S. Attach a cylindrical holder 2 and place a wire mesh 13 over the inlet 14 of the holder 12. At the same time, attach a tape-shaped paper 15 to the inlet 14 of the holder 12.
Wrap the inlet force 4 inside the holder 2.
A suction/nozzle 17 is rotatably mounted opposite to the suction nozzle hole, and supported by a support member 18 through a guide rod 19 and a spring 20 so as to be movable back and forth. 18 is connected to a drive source 22 in the control unit 3 via a rotating shaft 21, and the suction nozzle 17 is
The suction nozzle 24 in the suction section 2 is passed through the suction nozzle 24 through the a. In addition, the suction unit 2 is equipped with a valve 25 for regulating the suction pump 24, a flow meter 26, and a pressure gauge 27, and the control unit 3 is equipped with a sampling time that can be arbitrarily set in units of hours or days. A sampling time setter 28 is provided.

In addition to the cassette method using the presser ring 16 as described above, the paper 15 can be attached using a wrapping method in which only the paper is wrapped around the holder 2 and stopped appropriately. In the sampling device having the above configuration, when the suction pump 24 is operated, the air containing dust is siphoned.

It flows into the collection chamber 6 through the pipe 9 and is sucked into the suction nozzle 17 through the paper 15 attached to the inflow row 4 of the holder 2. Particles are removed and the remaining dust is made into monkey paper 1
Gathered on 6th. At this time, the drive source 22 drives the rotating shaft 2.
When the suction nozzle 17 is continuously rotated through the suction nozzle 1, dust is collected in a band shape on the paper, and when it is rotated intermittently, it is collected in a spot shape. It can be determined as necessary whether the bet collector 10 is used or not.
is designed to rotate.

That is, the support member 18 of the suction nozzle 17 is fixed on the middle cylinder 11, and the holder 12 is connected to the rotating shaft 21. In addition,
Since the other configurations are almost the same as those of the first embodiment, the same parts are given the same reference numerals and the explanation will be omitted. Also, the 6th
In the third embodiment shown in FIGS. 7 and 7, a nozzle member 29 having a plurality of suction nozzles 17a disposed circumferentially and facing each other at an inlet corner 4' is installed inside a holder 12 formed in a circular container shape. The airtight chamber 30 defined below the nozzle section 29 and each suction nozzle 17a are passed through through holes 3 opened concentrically on the lower surface of the nozzle member 29, and the airtight chamber 30 and a suction pump 24 are passed through each other through a suction conduit 23, and each through hole 31 has a valve body 33 biased in the valve opening direction by a spring 32. A control disk 34 is rotatably mounted on the rotating shaft 21, and a knob 35 for pushing up the valve body 33 protruding into the airtight chamber 30 is provided on the upper surface of the disk 34. The through hole 31 is sequentially closed by pushing up the valve body 33 as the disc 34 rotates, thereby displacing the suction nozzle 17a substantially in the circumferential direction with respect to the holder 12.

As described in detail above, according to the sampling device of the present invention, a tape-like paper is attached around the cylindrical holder, and the suction nozzle is displaced relative to the holder, thereby removing particulate matter. Since we have adopted the method of collecting oranges, we can collect many samples in succession by simply setting the moat paper once, and because there is no tension on the moat paper as in the case of the conventional roll-up method. In addition, since there is no need for a paper winding drum or a complicated feeding mechanism, the apparatus can be constructed very simply and compactly.

[Brief explanation of the drawing]

1 and 2 are a front view and a side view of an embodiment of the present invention, FIGS. 3 and 4 are an enlarged vertical sectional view and a cross sectional view of the main part thereof, and FIG. 5 is a front view and a side view of an embodiment of the present invention. FIGS. 6 and 7 are an enlarged longitudinal sectional view of the main parts of the second embodiment, and an enlarged longitudinal sectional view of the main parts of the third embodiment, and a sectional view of the same machine. 12... holder, 14... inlet, 15... paper, 17... suction nozzle, 23... suction conduit, 24... suction pump. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Completed diagram

Claims (1)

[Claims] 1 A tape-shaped filter paper is attached to a cylindrical holder with an air inlet in the circumferential direction, and a suction nozzle facing the above-mentioned inlet is arranged inside the holder so as to be relatively movable in the circumferential direction. and the suction nozzle is connected to a suction pump via a suction conduit.