JPH0112178Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a collector that can be used in a dust particle size distribution analyzer for exhaust gas and can collect not only dust but also mist.

2. Description of the Related Art Conventionally, a device shown in FIG. 1 has been known as a particle size distribution measuring device for dust in exhaust gas. In this device, a large number of cannula tubes 1a, 1b, 1c, ... are connected to each other by tightening thumb screws, and an inlet port 2 for gas containing the mist to be classified and collected is provided in the cannula tube 1a at the upper end. A suction cover 4 provided with a suction port 3 is connected to the cannula at the lower end, and a double bottom shape is attached to the spout of nozzles 5a, 5b, 5c, etc., which are fixed in advance in each cannula 1a, 1b, 1c,... Shallow container-shaped dust collectors 6a, 6b, 6c, etc. made of Outlet and dust collector 6a, 6
b, 6c,...
It is formed by gradually decreasing in size from the top to the cannula at the lower end.

This device connects the suction port 3 to a vacuum pump,
The mist-containing gas that entered through the inlet 2 is sequentially ejected from the nozzle, and is sprayed onto the top surface of each dust collector, allowing it to pass through the inside, then loosening the thumbscrew and disassembling each cannula. , the dust accumulated on the top surface of the dust collector is weighed and its particle size distribution is measured. However, when this device is used to collect mist or dust containing mist, The liquid accumulated on the top surface of the collector due to collection flows down and becomes unusable.
There is a disadvantage that it is not possible to measure particles that adhere to the wall surface around the collector or the back of the nozzle due to re-scattering caused when dust and mist collide with the upper surface of the collector.

On the other hand, the collector of the present invention can be directly attached to the conventional dust particle size distribution measuring device in place of the collector described above, and eliminates the above drawbacks. Vessels 10a, 10b, 10
c,... are made of thin transparent synthetic resin with moderate elasticity, as shown in Figures 3 and 4.
One end is connected to the nozzle 5 of the cannula 1a, 1b, 1c,...
A, 5b, 5c, . A disc-shaped collision plate 15 is protruded from the bottom of the circular container-shaped member 14 at a position opposite to the opening 11, and a mounting tube 16 that holds the collision plate 15 has a window hole 17 communicating with the outside. It is opened.
These collectors 10a, 10b, 10c,...
c,... and each nozzle 5a,
The diameters of the nozzles 5b, 5c, . . . and the distance between the nozzle and the collision plate 15 of the collector are formed such that the lower the nozzle is located, the smaller the diameter is.

The present invention has the above-mentioned structure, and to use it, connect a conventional dust particle size distribution measuring device to each of the mantle tubes 1a, 1b, 1c, ... sequentially from the bottom as shown in Figure 2. When assembling, the collectors 10a, 10b, 10c, ... of the present invention are mounted on the lower cannula with their respective flanges 13 in place of the conventional collectors 6a, 6b, 6c, ... Hold this brim edge 13
The next mantle is placed on top of the mantle from above, and the two are secured together by tightening the thumbscrews.The thus assembled measuring instrument can be used in an upright or horizontal position, After the required time has elapsed, each cannula is removed and taken out and measured according to particle size.
... is a thin film-like and lightweight material, so it is possible to extremely reduce measurement errors when weighing each tare bag, and it can be separated into the cylindrical container-like member 14 and the short cylindrical member 12, and the internal Samples can be easily collected, and dust and mist adhering to walls can also be collected separately. Furthermore, since the entire structure is made of a thin synthetic resin plate, it has many advantages such as being inexpensive and disposable.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventionally used dust particle size distribution analyzer for exhaust gas, Fig. 2 is a cross-sectional view of the dust and mist collector of the present invention attached to the above conventional device, and Fig. 3 is a cross-sectional view of a conventional device for measuring dust particle size distribution for exhaust gas. A longitudinal cross-sectional view of the present invention, FIG. 4 is a longitudinal cross-sectional view of the same exploded state. 10a, 10b, 10c... collector of the present invention,
11... Opening, 12... Short cylindrical member, 13...
...Brim edge, 14... Circular container-shaped member, 15... Collision plate, 16... Mounting tube, 17... Window hole.

Claims (1)

[Scope of utility model registration request] In the collectors used in exhaust gas dust particle size distribution measuring instruments, which are made by sequentially connecting a large number of mantle tubes with collectors interposed inside them to form an integrated vertical cylinder, the collectors are made from synthetic resin thin plates with moderate elasticity. A short cylindrical member whose upper end is a conical opening that fits the nozzle of the desired cannula, and whose outer diameter is large enough to fit inside the desired cannula and whose mouth rim is placed between the required cannula. Dust that is removably inserted and fixed into a cylindrical container-shaped part that has a protruding collar edge of a size to be clamped, and further has a collision plate located opposite the nozzle inside and a window hole that communicates with the bottom part. , mist collector.