JPH0454441Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an apparatus for collecting a sample from powder or granular material such as grain flowing in a flow path.

Conventional technology and its problems For example, when grains such as wheat are unloaded from a transport ship and sent to a silo at a port, samples are taken from midway through the flow path for quality control, official inspection of grade standards, etc. There is a need to.

For this reason, sample collection devices with various configurations have been proposed in the past, but in any case, it is not possible to collect samples homogeneously from the entire cross section of the flow path, and the sample collection device itself cannot be used as a particulate material. There were problems in that they were worn out due to friction and that foreign matter such as abrasion powder and dust was likely to be mixed into the sample.

Examples of these collection devices include, for example, the fifth
The butterfly valve 52 installed on the side wall 50 of the flow path 48 as shown in the figure opens and closes to take the powder into the sampling port 54, and the flow path 52 shown in FIG.
In some cases, a slit plate 58 is inserted into a part of the slit plate 58 and slid to take out a part of the powder through the collection channel 60, or as shown in FIG. There is a method in which a collection tube 64 is arranged, a slit 66 is provided in the collection tube 64, and the powder is collected by rotating the collection tube 64.

However, with any of the above-mentioned devices, it is not possible to uniformly collect the flux of powder or granular material, resulting in poor reliability, and there is also the problem that the incorporation of foreign substances such as dust into the sample cannot be completely avoided. There is.

Means for Solving the Problems The present invention includes an inlet having substantially the same shape as the flow path cross section of the powder and granules, and an expansion extending in a first direction and a second direction that are continuous with the inlet and perpendicular to each other. and an opening in one side along the first direction, further comprising a shielding means movably attached in the first direction covering the opening, and a frame fixed to the shielding means. a sample collecting means having a sampling port extending in a second direction of the inflow port and a discharge port passing through the shielding means and outside the frame; The above-mentioned problem has been solved by a sampling device having a drive means which produces a reciprocating movement between the two.

Function: The present invention uses a drive means to reciprocate the sample collection means between the expansion parts outside the flow path, so that the collection port divides the sample over the entire cross section of the inlet that is continuous with the flow path. There is. The opening of the frame separates the inside and outside of the device even during the reciprocating movement during sampling by a shielding means driven together with the sample sampling device, and prevents unnecessary powder and granules from inside the device from entering the diverted sample. prevent contamination.

When stopped, the sample collection means is positioned in the expanded portion outside the flow path, thereby avoiding wear and unnecessary collection due to friction or collision with the granular material.

Embodiment FIG. 1 is a partially cutaway perspective view showing the configuration of the present invention (slide plate 21, which will be described later, is not shown). To explain in detail, the sample collecting device 12 arranged in a rectangular flow path 10 has an inlet 14 having the same cross section as the flow direction of the powder or granular material in the flow path 10 and continues therein. The lower interior 16 of is expanded in the first direction, which is the driving direction of the air cylinder, which will be described later, and in the second direction, which is perpendicular to this direction.
It has a larger planar cross section than the inlet 14.

An opening 17 is formed along the first direction in one side of the frame 22 of the sample collecting device 12, and a sample extraction port 34 is arranged outside the opening 17. An attached frame 23 disposed on the opening 17 side of the frame 22 and extending in the first direction includes a slide plate 21 which is a shielding means that covers the opening 17 and shields the interior 16 and the sample extraction port 34.
is mounted movably in a first direction. A sample collection box 18, which is a sample collection means for collecting a sample, is fixed to this slide plate 21. This sample collection box 18 is connected to an air cylinder 24, which is a drive means attached to a frame 22, and The slide plate 21 and the sample collection box 18 are reciprocated in the first direction by the air cylinder 24 . During this reciprocating movement, the slide plate 21 moves toward the opening 1.
7 remains closed.

The sample collection box 18 has, on one hand, a collection port 19 extending slightly in a second direction below the inlet port 14 (see FIG. 4), and on the other hand, the sample collection box 18 has a collection port 19 that extends slightly in a second direction from the inlet port 14 (see FIG. 4); It has a funnel shape with a discharge port 20 through which a sample is taken out.

The sample collection box 18 reciprocates by the exhaust and intake of air from the air cylinder 24, and at both end positions, the collection port 19 is connected to the expanded portion 15 of the interior 16,
That is, it is placed outside the flux of the powder or granular material. Note that if the gap between the expanded portion 15 and the sampling port 19 is made very small at both end positions, it is possible to almost prevent the sample from flowing into the sample sampling box 18 at that position. If a lid 26, which is a closing means for covering the sampling port 19, is provided at both end positions, and the lid 26 is automatically closed except when collecting a sample, that is, at both end positions, it is possible to remove only powder and granular material. It is also possible to completely prevent the intrusion of foreign substances such as dust.

In addition, in FIG. 1, numerals 21' and 21' are guide rollers of the slide plate 21, and numerals 29 and 21' are guide rollers of the slide plate 21.
are inspection windows that can be opened and closed at any time to inspect the interior (these are omitted in Figure 2). When powder or granules flow in the direction of the arrow in the figure and a sample is to be collected, first open the slide plate. 21 closes the opening 17, and the sample collection box 1 is fixed thereto.
8 is moved in the first direction together with the slide plate 21 by the air cylinder 24. At this time, the sampling port 19 passes through the lower end of the inlet 14, which has the same cross-sectional shape as the channel 10, over its entire surface. When the sample collection box 18 passes through the inlet 14 and is located in the expanded portion 15 (indicated by a phantom line in the figure), the lid 26, which is swingably attached to the pin 26a, is moved by the sample collection box 18. The hanging part 26b is pushed and the sampling port 19 is automatically covered. With this function, the sampling port 19
This prevents foreign substances such as powder and dirt from entering. Note that the lid 26 may be equipped with a spring (not shown) or its own weight may be used to close the sample collection box 1.
When there is no pressing force of 8, the lid 26 can be in an open state.

The sample collected from the sampling port 19 is transferred to the discharge port 20.
Through this, the water is captured as a branch stream at the outlet 34 shown in FIG. 3, and the collection is completed. In addition, the uncollected particulate matter passes through the interior 16 of the sample collecting device 12 as it is and does not come out to the outlet 34.

The air cylinder 24 is connected to a control device 28 so that its operating speed is variable, and a position detector 30 allows it to reciprocate between both end positions as appropriate.

The amount to be collected can be adjusted to a desired amount by setting the number of reciprocations and the operating speed of the air cylinder 24 using the control device 28. Furthermore, as shown in Fig. 4, the opening degree of the sampling port 19 can be changed using the bolt 36 and the elongated hole 37, making it possible to adjust the sampling amount even for powder and granular materials with various characteristics. .

Since the present invention has the configuration as shown in the above embodiment, the sample once taken out is not contaminated with powder or granular material itself from the flow path, and no foreign matter or the like is mixed therein. Furthermore, by adjusting the opening of the collection port and appropriately setting the number of reciprocations and the reciprocation speed using the control device, appropriate collection can be performed regardless of the characteristics, type, and particle size of the powder or granular material.

Effects of the Invention The device of the present invention can accurately collect powder or granules in a flow path, that is, uniformly, and can obtain highly reliable samples. Since the sampling port is placed outside the flux when not in operation, it is possible to prevent foreign matter such as dust from entering the sampling port once the sampling is performed. In addition, it is more reliable to cover the sampling port with a lid at that position. Furthermore, the amount of sample to be collected can be adjusted in accordance with the characteristics of various powders and granules to be collected.

[Brief explanation of the drawing]

Figure 1 shows an outline of the invention, partially cut away.
2 is a front view with a part of the frame removed, FIG. 3 is a sectional view taken along the line 3-3 in FIG. 2, and FIG. 4 is an enlarged sectional view of the sampling port. Fifth
Figures to Figures 7 are conventional examples, in which Figure 5 is a sectional view of a butterfly valve type sampling device, Figure 6 is a sectional view of a slit gate type sampling device, and Figure 7 is a part of a rotary sampling device. FIG. 10... Channel, 12... Sample collection device, 14...
...Inlet, 15...Extension section, 16...Interior, 17
...opening, 18...sample collection box (sample collection means), 19...sampling port, 20...discharge port, 21...
...Slide plate (shielding means), 22...Frame,
24... Air cylinder (driving means), 26... Lid (closing means), 34... Outlet.

Claims (1)

[Claims for Utility Model Registration] (1) A sampling device for collecting powder or granular material flowing in a flow path, which device comprises an inlet having substantially the same shape as the cross section of the flow path; the device further comprises a frame having an extension extending in a first direction and a second direction that are continuous with the inlet and perpendicular to each other, and an opening in one side along the first direction; a shielding means movably attached in a first direction to cover the part; a collection port fixed to the shielding means and extending in a second direction of the inlet; and an outlet extending through the shielding means and outside the frame. A sample collecting device for powder or granular material, comprising: a sample collecting means; and a driving means for reciprocating the sample collecting means together with the shielding means between the expanded portion in the first direction. (2) The powder or granular material sampling device according to claim 1, which is characterized by having a closing means for closing the sampling port of the sample sampling device at the expanded portion in the first direction.