DK152155B - Apparatus for sampling of granular products - Google Patents

Description

in

DK 152155 B

Sampler.

Sampling in granular products such as cereals, seeds, oilcakes, plastic raw materials and the like. as far as possible when these products are moving in different transport means, 5 in this situation it is particularly easy to construct equipment which more or less automatically ensures representative samples of the granular material.

When one wishes to take representative samples of the granular products at rest, as occurs when the product is on a truck, in a railroad car, in a ship or in storage, the range of appropriate sampling equipment is extremely limited.

The most commonly used principle is tubular sampling skewers which are pressed into the cross section of the granular product where the sample is desired to be sampled. The skewer is then withdrawn from the product together with the sample, whereby the skewer tip may be provided with devices which prevent the sample from running back into the product.

For large manual skewers and automatically operated skewers, 2o is known to transfer the sample from the skewer to further sample processing by pneumatic transport. Furthermore, it is known to leave the skewer as a tube auger, in which the auger, during depression of the skewer, transports the granular product up through the tube auger, from which it is normally pneumatically sent for sample division and collection.

The existing solutions, with the exception of small manual skewers, are deficient in meeting the most important requirement for all sampling, namely that the sampled sample 3o has and retains exactly the composition applicable to the product at the sample site.

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DK 152155 B

For example, pneumatic transport by removing the sample from the spear allows easy entrapment of light particles from the product, which is immediately up to but outside the sample site. Snail transport during depression of the 5 skewer gives undesirable movements in the granular product at the test site with the following options for sorting due to different movement characteristics of the product particles.

The method according to the invention is characterized in that the sampling is divided into two phases, the first phase of which is that a tube auger is pressed down into the granular product at an appropriate speed, while the auger rotates at a speed which ensures that granular product in the tube substantially remains at rest until the tube auger has reached the desired depth and the second phase consists in rotating the auger at such a rate that the material inside the tube auger is transported up through the tube.

The sampling equipment according to the invention ensures a fully representative sample, by excluding the use of pneumatic transport and by avoiding movements in the granular product during the depression of the skewer.

Furthermore, the sampler, which is designed as a tube auger (1), can be assembled with a sample divider (2), which provides the advantage that a large primary sample can be taken, which is then subdivided controlled to the desired analytical sample (3). The excess (5) is sent directly back to the sample site and the analysis can be transferred to the site of analysis through a smooth tube.

DK 152155 B

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Figure 1 shows the sampling equipment according to the invention.

Figure 2 shows the sampling equipment mounted on a swivel console for sampling carts.

5 Referring to FIG. 1, the function can be described as follows: 1. As the auger in the tube auger (1) rotates, the tube auger moves down through the product under minimal influence thereof.

10 2. As the auger reaches the bottom gives a sensor (4-) impulse to its motor to change to transport speed, 3. The primary sample of approx. 10 1 is transported up through the tube auger and into the sample divider (2), where a fraction is taken to analysis (3), while the excess (5) 15 is returned to the loading, 4-, Sampling can be repeated 2-3 anywhere in the loading, and the total analysis sample is sent directly into the weighing compartment.

The horizontal movement across the loading can be achieved by a number of solutions adapted to the local conditions, for example, swing boom as shown in Fig. 2 or horizontal running track on fixed or mobile stand.

In Fig. 2, (6) is a pivotable bracket provided with a horizontal (7) and a vertical (8) running rail carrying the 25 'sampling equipment. (9) is a pods in which the excess of the sample material is returned to the loading. (1) is the tube auger with impulse sensor (4). The bracket can be placed in connection with a bridge weight (10), while simultaneously registering the customer and the amount of the delivery, in

Claims (2)

A method for sampling representative samples of granular products by means of a tube auger with a mounted motor characterized in that: a. The sampling is divided into two stages, the first phase consisting of pressing the tube auger into the granular product with an appropriate speed, the auger simultaneously rotating at a speed which ensures that the granular product in the tube remains substantially at rest until the auger has reached the desired depth and wherein the second phase consists of rotating the auger at such a rate that the material inside the tube auger is trans-protruded up through the tube. b. the sample is then subdivided in a manner known otherwise, and c. the auger is controlled by means of sensors arranged on the tube auger. Sampling equipment for carrying out the method according to claim 1, characterized in that the lower winding of the auger 20 is withdrawn just so much from the lower edge of the surrounding tube that only the amount of granular product which is inside the tube auger when the auger drive motor changes to transport speed. , is transported up through the tube for the advanced sample processing.