JP3193521B2 - Sampling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampling device for collecting a sample from a granular material line.

[0002]

2. Description of the Related Art For example, a sample of a grain or the like being transported in a transport pipe is collected in a short time, mixed, homogenized, and further subdivided evenly, and a part thereof is used as a sample. Will be Such an operation is always performed when a sample is collected as a test sample.

In this operation, there is an operation of collecting a small amount from a combination of several samples collected. This work is often done manually. On the other hand, the raw materials collected at several points are combined into a single operation rather than an operation called equalization, and these operations are also performed manually.

At present, in a process during operation, these samplings are performed, and online measurement for performing operation adjustment using the results is required. Of raw materials,
It is often performed in a flour production process such as a flour mill that directly measures this and uses the result to control the process.

[0005] In such a case, it is necessary to perform sampling from the inside of a transport pipe or the like, and to recover the rest of the sampled raw material that has not been used for measurement as it is.
It has become necessary to perform this automatically automatically.
In view of the above, there is a demand for an apparatus that automatically collects a very small amount from an appropriate amount. In addition, a system is required that can return the original system to a system other than the necessary amount of the sample, and it is desired that this system be automatically performed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been set in a powder line to collect a small amount of a quantitative sample and to remove unnecessary samples from an original line. It is an object of the present invention to provide a sampling device capable of returning to the above.

[0007]

In order to solve the above-mentioned problems, the present invention provides a storage chamber for temporarily storing powder and granules therein, and a sampling tube which branches obliquely downward from the storage chamber. Closing the storage chamber on the downstream side of the sample collection tube into the storage room during storage of the granular material, and allowing the granular material to branch and flow into a part of the sample collection tube by introducing the granular material from the upstream, The method is characterized in that a small amount of powder and granular material is left by opening the storage chamber, and this is collected as a sample.

The present invention also relates to a vertical powder material storage chamber having a valve at an upper inlet and a lower outlet and having an inlet for compressed air, communicates with the storage chamber, and branches obliquely downward from the storage chamber. And a sampling tube which protrudes and is provided with a valve at a protruding portion for a predetermined distance.

[0009] The present invention also provides a granular material introduction device for branching from a main flow line of granular material and introducing a certain amount of granular material, and a granular material introduction device connected to a lower portion of the granular material introduction device. A mixer for mixing the granules flowing from the device, a sampling device connected to a lower portion of the mixer and collecting a certain amount of sample from the granules flowing from the mixer, and a remaining granule for collecting the sample A return device for returning the body from the sampling device to the main flow line, wherein the sampling device is provided with a valve at an upper inlet and a lower outlet, and has a sample storage chamber having an inlet for compressed air, and communicating with the storage chamber. And a sample collection pipe which projects diagonally downward from the storage chamber and which is provided with a valve at a portion protruding a predetermined distance. The number of sampling tubes can be two or three if necessary, and the diameter can be freely selected.

[0010]

The sampling device according to the present invention comprises a storage chamber for temporarily storing powders and granules and a sampling pipe which is a branch pipe thereof. Valves are provided at an upper inlet and a lower outlet of the storage chamber.
A valve is provided in the middle of the branch pipe so that compressed air can be blown into the main pipe.
The purpose can be achieved by opening and closing the three valves and ejecting compressed air. That is,
When the powder at the outlet is closed and powdered and homogenized by sampling several times during the process and the like is charged, the powder is filled in the storage chamber, and the powder enters the branch pipe. The amount of granular material stored in the branch pipe, that is, the amount of sample to be collected, is determined according to the position of the valve provided in the middle of the branch pipe. When the valve at the outlet is opened, the granules in the storage chamber, that is, the remaining granules after sampling are dropped and discharged, and join the main line of the granules. Next, the inlet and outlet valves are closed, the branch pipe valve is opened, and compressed air is introduced into the main pipe, whereby the sample in the branch pipe is discharged and transported to the point of use. In this way, a certain amount of sample can be automatically collected by opening and closing the valve, and the remaining powder can be returned to the main line.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining a schematic configuration of a sampling apparatus according to the present invention.
(B), (c), (d), and (e).

In FIG. 1, a sampling apparatus according to the present invention is configured such that a granular material G is supplied from an upper inlet provided with a valve 1a to a valve 1a.
The storage chamber 1 comprises a storage chamber 1 flowing down to a lower outlet provided with a b, and a sampling pipe 2 branched from the storage chamber 1 at a branch port 1c and projecting obliquely downward. The sampling tube 2 communicates with the storage chamber 1 at the branch port 1c, and is provided with a valve 2a at a predetermined distance L from the branch port 1c. Therefore,
The length of the sampling tube 2 is L, and the powder G stored therein is sampled. If the sample collection tube 2 is, for example, a telescopic telescopic tube, the amount of sample to be collected can be freely adjusted by adjusting the tube. An air pipe 3 connected to a compressed air source (not shown) is connected to the storage chamber 1 via a valve 3a.

When the sampling device of the present invention having the above-described structure is branched off from the main flow line of the granular material and arranged in parallel to the main line, the following operation is performed.

In FIG. 1A, valves 1a, 1b,
2a is closed. The granular material G is sufficiently homogenized from the main flow line and is taken up to the valve 1 a, but has not yet entered the storage chamber 1.

In FIG. 1 (b), when the valve 1a is opened, the granular material G enters and fills the storage chamber 1, and at the same time, also enters the sampling tube 2.

In FIG. 1C, when the valve 1b is opened, the granular material G in the storage chamber 1 flows down and becomes empty. The powder G that has flowed down returns to its main flow line and rejoins. However, the sample in the sampling tube 2 remains.

In FIG. 1D, the valves 1a and 1b are closed.

In FIG. 1E, the valve 3a is opened,
Simultaneously, when the valve 2a is opened, the compressed air enters the storage chamber 1 and the sample collection tube 2, and discharges the powder G in the sample collection tube 2 in the direction of the arrow D by the pressure. It can be transported to a measurement location, for example, a moisture measurement room.

FIG. 2 is a diagram showing a schematic configuration of the sampling system of the present invention.

The sampling system branches off from the main flow line 10 in which a large amount of the granular material G flows downward and is arranged in parallel with the main flow line 10, and a part of the granular material G is introduced a plurality of times. , They are mixed, and the mixture is homogenized to collect a small amount of a fixed amount of sample. Sampling systems are roughly divided into introduction devices, mixers,
It is composed of a sampling device and a return device, and the operation of each device is automatically controlled to operate sequentially.

The introducing device is a sampling system for extracting a group of powder and granules from which a certain amount of sample required for various tests is taken from the powder and granules G flowing in the main stream line 10 in the direction of arrow A. It is a device to introduce to. The introduction device is, for example, a pneumatic device, as shown in FIG.
And a reciprocating container 4 (moving direction is indicated by arrow B) which retreats after receiving the sample, and a hopper 5 for rotating the retreated container 4 further in the direction of arrow C and receiving the discharged sample. And

The mixer 6 mixes and homogenizes the powders and granules received a plurality of times from the hopper 5 of the introducing device and increases the reliability as a sample.
Although a ribbon mixer is shown in FIG. 1, other types such as a non-powered static mixer and a degenerator may be used.

The sampling device is exactly the same as that shown in FIG. Therefore, description is omitted.

The return device is a valve 1b of the sampling device.
2 is a device for returning the remaining granules G discharged from the apparatus to the main flow line 10, and FIG. 2 shows a container 7 for temporarily storing the remaining granules G, a rotary valve 8 connected thereto, a granule Although a return device composed of an air pipe 9 through which compressed air for pushing G is passed is shown, it may be a pipe in which the valve 1b is simply connected to the main flow line 10 to cause the powder G to flow down by its own weight.

The above-mentioned sampling system operates as follows, for example.

In the main flow line 10, for example, 100 tons of powder and granules flow every hour. By moving the container 4 of the introduction device once into the main flow line 10 and retreating, 200 g of the granular material group is introduced into the sampling device. This introduction operation is repeated five times, so that a total of 1 kg of the granular material enters the mixer 6 from the hopper 5 and is mixed and homogenized. This one kilogram sample is put into the total sampling device, and a 7-gram sample is finally collected by the sampling tube 2 and sent to the moisture meter by compressed air. The remaining powder is returned to the main line 10 by the return device.

[0028]

As described above, the sampling device of the present invention has a vertical storage chamber having valves at the upper inlet and the lower outlet and having an inlet for compressed air, and the book is connected to the storage chamber. Since it is equipped with a sampling tube that protrudes diagonally downward from the tube and is provided with a valve at the protruding part for a certain distance, the structure is extremely simple, and by operating the valve, accurate flow can be achieved from the flow of a large amount of powder and granules. A certain amount of sample can be quickly collected and transported to the place of use, and the remaining powder can be returned to the main line, and these operations can be performed automatically. Further, the sampling system of the present invention is constituted by a series of introduction devices, mixers, sampling devices, and return devices that have been automated in operation. Since a small amount of sample is extracted and sampled from the inside, an average high quality sample can be finally obtained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a sampling device according to the present invention.
(C), (d), and (e).

FIG. 2 is a diagram showing a schematic configuration of a sampling system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage room 1a Valve 1b Valve 2 Sampling tube 2a Valve G Powder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-269022 (JP, A) JP-A 62-178346 (JP, U) JP-A 59-128549 (JP, U) JP-A 61-269549 (JP, U) 107063 (JP, U) Japanese Utility Model Hei 2-83444 (JP, U) Special Table Hei 3-500208 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 1/00-1 / 34 JICST file (JOIS)

Claims (2)

(57) [Claims] 1. A vertical granular material storage chamber having a valve at an upper inlet and a lower outlet and having an inlet for compressed air, communicates with the storage chamber, and diverges obliquely downward from the storage chamber and is fixed. A sampling device comprising: a sampling tube provided with a valve at a distance protruding portion. 2. A granule introduction device for branching from a main flow line of granules and introducing a certain amount of granules, and a granule introduction device connected to a lower portion of the granule introduction device and flowing from the granule introduction device. A mixer for mixing the powdered granules, a sampling device connected to a lower portion of the mixer and collecting a certain amount of sample from the powders and granules flowing from the mixer, and A return device for returning from the sampling device to the main flow line, wherein the sampling device has a valve at an upper inlet and a lower outlet and has a sample storage chamber having a compressed air inlet, and the storage chamber communicates with the storage chamber. And a sampling tube that projects diagonally downward from and has a valve provided at a protruding portion for a predetermined distance.