JPH02280029A - Method and device for sampling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to powder and granular materials conveyed by a belt conveyor, etc.
-Relates to sampling methods and equipment for sampling representative samples online from loose materials, etc.

[Conventional technology]

There are various techniques for automatically sampling powder, granules, bulk materials, etc. online. These include, for example, those that separate a part of the sampled material by installing a branch channel in the conveyance path of the sampled material, and those that scoop up the sampled material with a container such as a spoon that crosses the falling powder. Various types of mechanisms are used, such as branch gates, intermittent, reciprocating, and turning devices.

In general, particle size segregation, etc., cannot be avoided with powdered materials, loose materials, etc., during transport or during falling, and it is difficult to reliably grasp a representative sample if the transport path has branches. Furthermore, even when scooping with a container such as a spoon, the size and position of the container, or the movement of the container, etc. are not always appropriate and are often not suitable for collecting an unbiased and uniform representative sample. Additionally, conventional sampling devices that move large containers to avoid segregation and the like are large, complicated, and expensive.

[Problem to be Solved by the Invention 1] The present invention aims to provide a powder, granular or loose material sampling method and apparatus thereof, which eliminates such conventional drawbacks and allows representative samples to be easily collected with a simple structure. That is.

[Means for Solving the Problems] The present invention reciprocates the sampler across the entire cross section of the flow of the sampled material, discards all samples on the outward journey near the dead center of the reciprocating movement, and crosses the entire cross section on the return journey. This is a sampling method characterized by sampling.

The device of the present invention consists of the following technical means.

In the middle of the head discharge locus of the belt conveyor, a separate path is provided in a direction substantially perpendicular to the discharge locus, and the belt conveyor reciprocates on the separate path to sample the released load by crossing the entire cross section of the discharge locus. The sampler is provided with a bottom opening/closing gate that automatically closes, and the opening/closing gate is installed at a position where the upper opening of the sampler passes through the discharge trajectory and a position where the bottom surface of the sampler reaches above the sample discharge port. This sampling device is characterized by being provided with an opening mechanism.

[Effect 1] Since the method of the present invention performs sampling across the entire cross section of the flow of the sampled material, the effects of segregation and the like can be completely excluded. In addition, the method of the present invention covers the entire cross section of the flow of the sampled material by reciprocating motion during sampling.
Since all the samples taken on the outward trip are discarded and sampled on the return trip, i) The movement path of the sampler is simple and can be applied even in narrow places.

ii) The speed of the return trip allows the sampler to be made smaller without losing sample representativeness.

The apparatus of the present invention can suitably carry out the above method, and has an extremely simple structure consisting of a separate passage, a sampler, and a winding device for the same. The separate route is fitted into the head chute of the belt conveyor, and its high side is connected to a simple tower. The tower will be a lobe tower for raising and lowering the sampler, and the sampler will be raised and lowered along a separate path using a pulley and hoist. The sampler is equipped with a bottom opening/closing gate, and the opening/closing of the gate is performed by an operation stopper provided separately.

[Example] FIG. 1 shows an embodiment of the apparatus of the present invention.

FIG. 1(a) is an overall side view of an embodiment of the device of the present invention, and FIG. 1(b)
') is a plan view of the sampling device, and (C) is an elevational view thereof.

A conveyed object 1, which is a powder or bulk material conveyed on a belt conveyor, is discharged from a head pulley 2 into a hopper 3. 4 is the discharge locus. In the middle of this unloading locus 4, a separate path 11 is provided which intersects this unloading locus 4 at a substantially right angle. This separate channel 11 extends upward from inside the head hopper 3, and its upper end is fixed to the tower 12.

(b) As shown in the figure, the separate route 11 has a pair of guide rails (
In the embodiment, it is made of channel steel (in the embodiment) and is in close contact with the inside of the side plate of the head hopper 3. A sampler 14 is mounted on this separate path 11, and a reciprocating cart 13 is attached to the sampler 14. The forward 1M trolley 13 has wheels that are guided to the separate route 11,
The wire lobe 33 causes the cart 13 to reciprocate using a hoist 31 and pulleys 32 and 35 attached to the hoe 12. Sampler! 4 has a size that crosses the entire cross section of the discharge locus 4, as is clear from the figure (b). Sampler 14
is equipped with an opening/closing gate 15 that automatically closes due to gravity. This opening/closing gate 15 is equipped with an opening/closing arm 16, and when this arm 16 hits a stopper 21 attached to the hopper 3, the gate is opened. This stopper 21 is provided at a position where the gate is opened at a position where the sampler 14 passes through the discharge locus 4.

A sample receiving hopper 7 is provided below the separate passage 11. This sample receiving hopper 17 has a bifurcated lower bottom, making it possible to return unnecessary samples into the hopper 3.

A stopper 22 is attached to the separate passage 11 to push open the opening/closing gate 15 of the sampler when the sampler 14 reaches directly above the sample receiving hopper 17.

The method of using the sampler of the example is as follows. Separate route 1
The sampler 14, which is waiting on the sampler 1, crosses the discharge trajectory 4 and descends by a separate route by the drive of the hoist 31.

When passing through the discharge trajectory 4, the stopper 21
At this time, gate 15 is opened. By opening and closing, floating ducts and other residues accumulated in the sampler 14 during standby and those that entered when passing through the unloading trajectory 4 from above are discharged into the hopper 3, resulting in an empty state. Next, when the sampler is pulled up in the upward direction, the gate 15 is automatically closed, and the sampler performs sampling while rising across the discharge trajectory.When the sampler 14 reaches the sample receiving hopper 17, the stopper 22 is The tart I5 is pushed open and discharged into the sample receiving hopper 17.

[Effects of the Invention] According to the present invention, highly reliable samples without particle size segregation of powder or bulk materials can be collected. The commands required for operation are also simple.

The apparatus of the present invention can suitably carry out the method of the present invention, and is simple and inexpensive. In other words, the head of a belt conveyor is usually narrow and it is difficult to install a sampler, etc.
However, there is a relatively large space in front of the top of the head boob, making it easy to install.

1ii1 The larger the capacity of the belt conveyor, the larger the amount of sampling at one time (reduction in the next process is essential, but since the sample is discharged from a high position, it is difficult to return unnecessary samples to the original belt conveyor head hopper). is easy.

1iii1 Since most of the work required for installation is performed outside the hopper of the belt conveyor head, installation can be accomplished in an extremely short downtime.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the device of the present invention, (a) side view, (
b) Plan view; (c) Elevation view of the sampler. ■...Conveyed object 2--Head pulley 3...
Head part 4...-Discharge locus lO--Sampling device 11--Separate route 12--Tower 13...
Reciprocating trolley 14... Sampler 15... Gate
16...Arm 17...-Sample receiving hopper 21.22...Stomper pump 31...Hoist 32...Pulley 33...-Lobe

Claims (1)

[Claims] 1. A sampler is reciprocated across the entire cross-section of the flow of the material to be sampled, all samples on the outward journey are discarded near the dead center of the reciprocating movement, and the entire cross-section is sampled on the return journey. Featured sampling method. 2. A slope is provided in the middle of the head discharge locus of the belt conveyor in a direction substantially perpendicular thereto, and the belt conveyor crosses the entire cross section of the discharge locus and reciprocates on the slope to sample the released load from the upper opening. A sampler is placed on the slope, the sampler is provided with a bottom gate that automatically closes, and a bottom gate opening mechanism of the sampler is provided at a position passing through the discharge trajectory and at a sample release position. sampling equipment.