JPS5830531B2 - Powder sample collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a box-type automatic sample collection device that automatically collects samples from powder and granules that are materials for foods, medicines, feeds, and other various products.

- Collecting samples during the film quality manufacturing process and inspecting the quality is an important task.

In this case, the sampling operation is meaningless unless it is collected from the entire flow of powder and granules.

As a conventionally used sample sampling apparatus for this kind of powder or granular material, for example, a screw autosampler as shown in FIG. 1 is known.

This device has a rotating cylinder with a screw conveyor inside installed perpendicularly in the middle of a cylindrical raw material (powder) flow path, and a sampling notch is provided in a part of the rotating cylinder. It becomes a composition.

When collecting powder, the rotary cylinder rotates 180 degrees with the notch facing upward, and the powder and granules that have entered the rotary cylinder are taken out from the notch by the rotation of the screw. After a certain period of time, the rotary cylinder is rotated again 1800 times, the notch is turned downward, and sampling of the powder and granular material is stopped.

However, with this configuration in which the sampling rotating tube is located in the center of the flow path, it is possible to collect only the sample from the center.
This is only a partial quality survey result.

In addition, since the notch that serves as the sampling port is an open type that is always open, even if it is facing downward, dust can enter, which will interfere with the next stage of sampling work.

The present invention has been completed in view of the above-mentioned circumstances, focusing on the fact that if it were possible to collect uniform samples, it would be a benefit to those skilled in the art.

That is, in the present invention, a flow path and collection tank is partitioned by a movable partition, a sample collection tube that reciprocates perpendicular to the flow path is disposed in this flow chamber, and the lower end of the sample collection tube is connected to the movable partition that is integrated with the flow chamber. The sample collection chamber is accessed through the tube, and the sample collection tube is moved back and forth to uniformly collect the sample.

Hereinafter, the present invention will be explained with reference to drawings of embodiments.

Reference numeral 1 denotes a box-shaped channel/collection tank with openings 1a and 1b arranged in the upper and lower parts, and a box-shaped channel/collection tank 1 has a box-shaped channel/collection tank with openings 1a and 1b arranged at the top and bottom. A freely movable partition wall 2 is arranged to partition the flow path and collection tank 1 into a flow chamber section 3 and a sample collection chamber section 4.

Reference numeral 5 denotes a narrow sample collection tube with a collection port 6 on its upper surface, which is installed in the flow chamber 3, and one end of the sample collection tube 5 is integrally attached to the movable bulkhead 2, and is arranged at the lower end of the funnel. The sample collection chamber section 4 is faced with the discharge lower.

When the sample collection tube 5 is not in use, it stands by on one side 3al away from the opening 1a of the flow chamber 3, and the lid 8 is lowered into the collection port 6 of the sample collection tube 5 to keep it in a closed state. Become.

Reference numeral 9 denotes an opening/closing cylinder provided at the top of the lid 8, and an upper limit switch 10 and a lower limit switch 10' are arranged at the bottom of the cylinder 9.

Reference numeral 11 denotes a sliding cylinder having one end attached to the movable bulkhead 2. The cylinder 11 is arranged horizontally so as to be parallel to the sliding direction of the movable bulkhead 2, and has an operation confirmation limit switch 12 and a storage confirmation limit switch 12'. Be prepared.

To explain this action now, first, when the powder or granule material flows into the opening 1a that serves as the raw material input port arranged at the upper part of the flow chamber 3, the mainstream powder or granule material A flows through the funnel located directly below the opening 1a. It flows out from the shaped opening 1b.

In this case, since no obstacles are placed in the flow path 3a, the flow velocity does not change.

When not sampling, place the sample collection tube 5 at a location other than the powder passage (3 a t on one side).
'.

The sample collecting tube 5 is stored in a standby state, and a lid 8 is positioned to prevent fine powder from entering the collection port 6 of the sample collecting tube 5.

Here, when performing sampling work, first, the lid 8 is raised by the operation of the cylinder 9 by the action of a timer or the like built into the operation panel (not shown), and the lid 8 is moved to the home position. When this happens, the upper limit switch 10 is activated, and in conjunction with this upper limit confirmation, the movable bulkhead cylinder 11 is activated.

Next, by the operation of this cylinder 11, the piston rod 1
As the piston rod 1a retreats, the movable partition wall 2 attached to the end of the piston rod 11a slides in a direction perpendicular to the flow direction of the powder.

In this case, the upper and lower edges of the movable bulkhead 2 are guided in the guide rail groove 13, and the front and rear edges are inserted through the slit 14 having a width close to the wall thickness of the movable bulkhead 2, so that Alternatively, the fine powder floating in the sample collection chamber 4 is blocked and does not leak to other rooms.

When the movable partition wall 2 slides in this manner, the sample collection tube 5 integrated with the movable partition wall 2 moves across the flow path 3a of the flow chamber section 3, so that the upper surface of the sample collection tube 5 is collected. A part of the powder material falls into the opening 6.

Next, when the connecting piece 2a of the movable bulkhead 2 hits the storage confirmation limit switch 12' disposed at one end, the air supplied to the cylinder 11 is replaced, the piston rod 11a is extended, and the movable bulkhead 2 returns to its original state. It will retreat towards the position.

That is, the sample collection tube 5, which moves together with the movable partition wall 2, reciprocates across the width of the flow path 3a,
This means that samples were collected over the entire flow path 3a.

The sample powder A' collected in this manner flows into the sample collection chamber 4 through the discharge lower of the sample collection tube 5, and can be taken out from the lower end thereof.

Next, when the movable bulkhead 2 returns to its original position and the connecting piece 2a hits the operation confirmation limit switch 12, the cylinder 9
is activated, the lid 8 descends and the collection port 6 of the sample collection tube 5 is blocked.

A sponge packing 15 is attached to the lower surface of the lid body 8 to improve sealing performance.

When the lid 8 is lowered and sealed in this manner, the lower limit switch 10' is activated to complete one sampling operation.

As described above, the powder sampling device of the present invention divides the flow path and collection tank into a flow chamber section and a sample collection chamber section by using a movable partition wall, and also includes a movable partition wall and a sample collection chamber section on the flow chamber side. By arranging the sample collection tube that integrally moves back and forth through the flow path, it is possible to collect a sample from the powder fluid descending through the flow path over the entire area of the flow path.

Moreover, in this case, the sample collection tube is moved back and forth at a constant speed using a sliding cylinder provided on the movable partition wall, so that uniform samples are collected.

Of course, the movable bulkhead that performs this sampling operation is configured to move through the upper and lower guide rail grooves and the front and rear slits, so even when the sample collection tube is moving, there is no possibility that fine powder will enter the sample collection chamber side. This also makes it possible to collect samples reliably.

In addition, when sampling work is not being performed, the sample collection tube is stored close to the side of the flow path, so it does not affect the powder falling through the flow path, and even during this waiting period. Under these conditions, since the lid is located at the collection opening of the sample collection tube, fine powder does not enter the sample collection tube.

Further, since the device of the present invention has an extremely simple structure in which the sample collection tube is moved back and forth, it can withstand long-term use without causing malfunction, failure, or damage during use.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of the main part of the conventional product, FIG. 2 is a longitudinal sectional side view of the main part of the apparatus of the present invention, FIG. 3 is a plan view of the same, and FIG. 4 is a slope view. 1... Channel and collection tank, 1a, 1b... Opening, 2...
- Movable bulkhead, 3... Flow chamber section, 4... Sample collection chamber section, 5... Sample collection tube, 6... Collection port, 7... Outlet port, 8... Lid body, 9... Cylinder, 10... Upper limit switch, 101... Lower limit switch, 11... Cylinder.

Claims (1)

[Claims] 1. In an automatic sample collection device for powder and granular material whose collection tank is a flow channel for powder and granular material with openings at the top and bottom, a movable partition wall that moves back and forth perpendicular to the flow channel is installed on one side of the flow channel and collection tank. The flow chamber is divided into a flow chamber and a sample collection chamber, and a narrow sample collection tube with an opening on the top surface integrated with a movable partition is installed inside the flow chamber, and the lower end of the sample collection tube is A powder or granular material characterized in that the sample collection tube faces the sample collection chamber through a movable partition, and the sample collection tube follows the movable partition and reciprocates within the flow chamber to collect the sample powder or granular material. Sample collection device.