JP2003106955A - Spoon type sampling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively remove deposits such as coal powder from a spoon like sampling tool inner face. SOLUTION: In the spoon type sampling device for coal, a spoon like sampling tool 11 is provided on a tip of a hollow turning arm 10, a coal sample is sampled by the sampling tool 11, the sampling tool 11 is guided to a required position Q by turning the turning arm 10, and the coal sample in the sampling tool 11 is delivered to the required position Q. A pressurized air jetting hole 20 is provided in an inner face base of the sampling tool, and deposits such as coal powder or moisture of the sampling tool 11 inner face are blown by pressurized air (a) from the jetting hole 20. The blowing is carried out right after delivering the sample. If the pressure jetting hole is provided on the sampling tool itself, the jetting hole can be provided in an optional position as long as there is no hindrance to air piping, and the deposits can be smoothly removed. A cross sectionally triangular cover 14 is provided on a top face of the turning arm 10 to prevent accumulation of dust or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spoon-type sampling device used in a thermal power plant, an iron mill, or the like when collecting a sample of a coal crushed product in order to know its properties.

[0002]

2. Description of the Related Art For example, in industries handling coal crushed products, such as the electric power industry, the iron manufacturing industry, and the coal distribution industry, it is necessary to know the properties of the crushed coal products, and there is a spoon type sampling device. This spoon-type sampling device will be described with reference to FIGS. 1 and 2 showing an embodiment of the present invention. Between the sampling part such as a coal crushed material conveying path H and a receiving part Q such as a hopper 32 that receives a sample. A swivel arm 10 is swivelably provided, and a spoon-shaped sampling tool 11 is provided at the tip of the swivel arm 10. In the sample section H, a coal sample is collected by the sampling tool 11, the swivel arm 10 is swung to guide the sampling tool 11 to the receiving section Q, and then the sampling tool 11 is inverted to dispense the sample, and thereafter,
The revolving arm 10 revolves to return the sampling tool 11 to the sample section H. This operation is repeated to collect a coal sample.

In this sampling operation, if coal powder or water adheres to the inner surface of the sampling tool,
There are inconveniences such as a decrease in the amount of subsequent sample collection.
Therefore, in the conventional art, as shown in FIG.
A jet nozzle 50 for ejecting the pressure air a is provided on the turning path of 0 (sampling tool 11), and the pressure air a is blown from the nozzle 50 to the inner surface of the recess of the sampling tool 11 to remove the adhered matter.

[0004]

However, the nozzle 50 and its air pipe 51 must be arranged so as not to interfere with the turning of the turning arm 10 and the sampling tool 11, and the arrangement is limited. For this reason, sufficient pressure air a cannot be blown over the entire inner surface of the sampling tool 11, and smooth deposits may not be removed in some cases.

Further, from the viewpoint of maintenance of the nozzle 50, it is necessary that the position of the nozzle 50 should not be touched (impacted) by the fallen adhered matter, and this also limits the arrangement.

An object of the present invention is to make it possible to smoothly remove deposits from a sampling tool.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sampling tool itself with a pressure air ejection hole. With this configuration, the ejection holes can be provided at arbitrary positions of the sampling tool as long as there is no hindrance to the air piping, and therefore the optimum position for removing the deposit can be selected.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, a spoon-shaped sampling tool is provided at the tip of a revolving arm,
A crushed material sample is taken by the sampling tool, the swivel arm is rotated to guide the sampling tool to a required position, and the crushed material sample in the sampling tool is discharged to the required position. It is possible to adopt a configuration in which an air ejection hole is provided and the attached air such as crushed powder or water on the inner surface of the sampling tool is blown off by the pressure air from the ejection hole.

The supply of the pressurized air to the ejection hole is, for example, if the swivel arm is hollow and the inside of the swivel arm is a pressure air path to the spout hole, a flexible tube or the like from the swivel center of the swivel arm. Can supply pressurized air to the pressurized air passage.

If the jet holes are provided at the root of the inner surface of the sampling tool, the pressure air can diffuse from the root of the inner surface to the entire area, and the deposits on the entire inner surface can be smoothly removed.

If the pressured air is ejected from the ejection holes immediately after the sample is ejected, the adhering substances are less likely to drop and scatter at the ejecting place.

Further, it is preferable that the upper surface of the revolving arm has a triangular cross section in the lengthwise direction to prevent dust and the like from accumulating on the upper surface thereof.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment is shown in FIGS.
Further, a gear box 4 having a turning motor 2 and a turning shaft 3 is provided. The sprocket 5 of the turning motor 2 and the sprocket 6 of the gearbox 4 are connected by a chain 7, and by driving the motor 2, the sprockets 5, 6,
The turning frame 8 fixed to the turning shaft 3 turns via the chain 7 and the gear box 4.

The revolving frame 8 is provided with a hollow revolving arm 10 having a spoon-shaped sampling tool 11 at its tip, and a reversing motor 13 connected to the revolving arm 10 via a bearing 12a, a coupling 12b and the like. Therefore, the sampling tool 11 is rotated forward and backward by the forward and reverse rotation of the motor 13. The turning arm 8 can turn between the coal crushed material conveying path H and the sample receiving section Q, and the stop positions of the coal crushed material conveying path H are A, B, and C.
The coal of each of the points A, B, and C is sequentially collected. Further, a limit switch (not shown) is provided between the two frames 1 and 8 to prevent turning beyond a required range. Furthermore, the swing arm 10
A triangular cover 14 is provided on the upper surface of the so that the coal powder does not adhere to the turning arm 10.

The sampling tool 11 has a spoon-like shape and is fixed to the distal end of the revolving arm 10 by its base, and the entire inner surface of the concave shape is coated with an anti-adhesion agent b such as high-density polymer. The tip end surface of the swivel arm 10 to which the sampling tool 11 is fixed is closed, and a hole 20 is formed over substantially the entire length of the base of the inner surface of the sampling tool 11 of the closed wall. The holes 20 may be intermittent along the circumference, and the length in the circumference direction is arbitrary as long as the adhered matter removing action on the inner surface of the sampling tool 11 described later is smoothly performed. A flexible pressure air supply pipe (not shown) is connected to the center of rotation of the swivel arm 10, and pressure air a is introduced from the pressure supply pipe into the hole 20 of the sampling tool 11 through the swivel arm 10. Get burned.

The sample receiving portion Q is composed of one hopper 32 provided on a rotating frame 31, and the frame 31 rotates intermittently to cause the frame 31 to rotate.
The hoppers 32 provided on the inner periphery are sequentially positioned in the sample receiving section Q.

This embodiment is constructed as described above, and the sampling tool 1 is provided at any one of A, B and C of the coal crushed material conveying path H.
When the motor 1 is positioned for a certain period of time, the rotating arm 1 is driven by the motor 2.
0 rotates to guide the sampling tool 11 to a predetermined position on the hopper 32 of the receiving portion Q, and the revolving arm 10 rotates by the motor 13 to invert the sampling tool 11 (see FIG. 4).
(State of (b)), the coal sample therein is the hopper 32.
Is dropped inside. After this reversal, the pressure air a is jetted from the hole 20 at the same time as the coal sample falls or after a certain time, and the pressure air a is blown onto the inner surface of the sampling tool 11. At this time, since the hole 20 is located at the root of the inner surface of the sampling tool 11, the compressed air a is evenly spread over the entire area from the root of the inner surface of the sampling tool 11 to smoothly remove the deposits.

When the dispensing of the coal sample is completed, the revolving arm 10 revolves in the opposite direction to the above, and the sampling tool 11 is rotated.
Returns to any one of A, B, C of the coal crushed material transportation path H,
Thereafter, a coal sample is collected by the same action.

On the other hand, in the receiving part Q, generally, the amount of coal collected by the sampling tool 11 is about 2 kg,
Since the capacity of one hopper 32 is about 200 kg, the hopper 32 becomes full in about 6 hours and the next hopper 32
Moves to the sample receiving section Q. The sample is appropriately taken out from the hopper 32 containing the sample, and various property inspections are performed.

This example was applied to sampling of crushed coal, but the present invention is also applied to other crushed products (including crushed products), for example, crushed products of inorganic substances such as iron ore, calcium carbonate and talc. It is also possible to use it for sampling the various crushed products when granulating them.

[0021]

As described above, according to the present invention, the sampling tool itself is provided with the pressure air ejection hole, and the pressure air is ejected from the ejection hole to remove the deposits on the inner surface of the sampling tool. Therefore, the adhered substances can be smoothly removed, and the restriction of the pressure air piping is reduced.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an embodiment.

FIG. 2 is a front view of a main part of the embodiment.

FIG. 3 is a front view of a main part of the embodiment.

4A and 4B show a sampling tool of the same embodiment, in which FIG. 4A is a cutting plan view, and FIG. 4B is a cutting front view at the time of inversion.

FIG. 5 (a) is a sectional side view of a sampling tool, (b).
Is a cutaway side view of the swivel arm

FIG. 6 is a front view of a main part of a conventional example.

[Explanation of symbols]

1 base frame 2 rotation motor 3 swivel axes 8 swivel frames 10 swivel arm 11 Sampling tools 13 Inversion motor 14 cover 20 Pressure air ejection holes 32 Hopper for storing coal samples H coal crushed material transportation path Q Coal sample receiving section a Pressure air b Anti-adhesion agent

Claims (5)

[Claims] 1. A spoon-shaped sampling tool 11 is provided at the tip of the swivel arm 10, a crushed material sample is collected by the sampling tool 11, and the swivel arm 10 is swung to guide the sampling tool 11 to a required position Q. In the spoon type sampling device for discharging the crushed material sample in the sampling tool 11 to the required position Q, the sampling tool 11 is provided with a pressure air ejection hole 20, and the inner surface of the sampling tool 11 is formed by the pressure air a from the ejection hole 20. A spoon-type sampling device characterized by blowing off crushed powder and attached substances such as water. 2. The spoon-type sampling device according to claim 1, wherein the revolving arm 10 is hollow, and the inside of the revolving arm 10 serves as a pressure air path to the ejection hole 20. 3. The ejection hole 20 is provided at the root of the inner surface of the sampling tool 11.
Alternatively, the spoon-type sampling device according to item 2. 4. The spoon-type sampling device according to claim 1, wherein the pressure air a is ejected from the ejection hole 20 immediately after the ejection. 5. The spoon-type sampling device according to claim 1, wherein a top surface of the revolving arm 10 has a triangular cross section in a longitudinal direction thereof.