JPS62261939A - Sampler for powder and liquid - Google Patents

Abstract

PURPOSE:To obtain a simple and high-performance sampler by providing many axial flow blades which have a unidirectional pitch angle to a rotatable shaft and blades which slant in a different direction from said blades around the shaft, and sampling a sample by the different-directional blades. CONSTITUTION:Many axial flow blades 3 are fitted around the rotating shaft 2 to form an impeller 4. A flow passage for bodies 5 to be measured is so formed that the bodies 5 to be measured pass through part of the impeller 4 axially, and the axial flow blades 3 have the constant pitch angle to the shaft axis, so the impeller 4 is given a turning force from the bodies 5 to be measured which strike and slide on the blades 2, thereby rotating on its axis. Then, 1-2 sampling blades 7 for every 6-8 axial flow blades 3 are provided as some of the axial flow blades 3 and made different in the slanting direction from the axial flow blades 3, and a sampling flow passage 8 is provided ahead in the slanting direction of the blades 7 to obtain an accurate sample 9 which has a high condensation ratio.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sampler for powders and fluids, and more specifically, it samples a part of large powder or corrugated material during transportation, and samples the entire transportation. This invention relates to an apparatus for obtaining samples representative of the physical properties of objects.

[Conventional technology]

Person 7. In order to accurately sample a representative sample from a powder or fluid (hereinafter referred to as the object to be measured) being transported, it is necessary to set the sampling density proportional to the amount of dust transported per unit time of the object to be measured to several sevens times the amount of transported dust. It must be sampled at a reduction ratio of one to several parts of

・Generally unit time transportation! If the shadow is large, it is necessary to increase sampling in proportion to this, and this increases the amount of work required to analyze the physical properties of the measured object, so the reduction ratio must be increased. The larger the value, the greater the possibility that deviations will occur between the physical properties of the object to be measured and the analytical values of the sampled physical properties due to errors in the reduction process.

In addition, with conventional equipment that takes samples intermittently at sampling intervals, if the physical properties of the object to be measured vary greatly over time, the longer the sampling interval is, the larger the error will be, and the smaller the sampling interval is, the greater the sampling accuracy will be. However, since the number of mushrooms to be collected also increases proportionally, the number of reduction operations will increase.

When the flow rate of the object to be measured fluctuates over time, it is desirable that the sampling noise be proportional to the amount of variation. Detect.

Sophisticated samplers must be equipped that can increase or decrease the sampling field based on that information.

For example, the conventional sampler shown in FIG. 8 samples a sample by rotating a rotary packet 23 that scoops up a sample from a transport path 25 of the object to be measured using a rotary drive type 2222. By detecting the amount of passage (Δ0/T) with the flowmeter 21, converting the information into signals such as current and voltage, and controlling the rotation speed of the rotary drive device 22, the amount of passage per medium time can be calculated. Since the rotation speed of the sampler 24 can be obtained in accordance with the flow rate of the sample 26, the sample 26 to be sampled is also proportional to the flow rate of the object to be measured.

In such a system, a more advanced control circuit can be used to improve accuracy, but the structure and structure become complicated. - Most of the commonly used sampling systems are simple, and the average time of the measured object is 11 tons per hour.
! +? :The current situation is that many machines are used that do not have a detection device or a rotation speed control mechanism and have a constant rotation speed.

[Problem that the invention seeks to solve]

The present invention is capable of rationally contracting the flow 76 directly and continuously from the flow path of the object to be measured in accordance with the flow rate of the object to be measured, without having a complicated device such as a measuring device or a rotation speed control device coupled thereto. A separate sample can be taken. Our goal is to provide a simple and high-performance sampler.

[Means for solving problems]

The present invention uses the following means as technology/L stage.

(1) An impeller is formed in which a large number of axial flow blades having a pitch angle in one direction with respect to the axis are attached in the radial direction around a freely rotatable shaft.

(2) A passage is provided through which the object to be measured passes in the axial direction through a portion of the blade portion of the impeller.

(3) One part of the blades is tilted in a direction different from the other blades, and this blade collects the sample.

A separate outlet for sample collection is provided at the end of the slope.

By arranging samplers having the above configuration in series, samples with a large reduction ratio can be obtained.

Since the device of the present invention rotates (rotates) due to the flow of the object to be measured, it is preferable to attach a rotation speed adjustment device to the rotation axis in order to compensate for rotation accuracy due to inertia when the meteor changes.

[Effect]

A perspective view of the main parts of the sampler I of the present invention is shown in FIG. Further, FIG. 2 shows a top view of the same, and FIG. 3 shows an elevation sectional view.

A large number of axial flow blades 3 are attached around the rotating shaft 2 to form an impeller 4. A flow path 6 to be measured is formed such that the object 5 to be measured passes through a portion of the blade Ilj 4 in the axial direction. Since the axial flow blade 3 has a fixed pitch angle with respect to the axis, the object to be measured hits the blade 2 and slides on the surface of the blade 2, thereby imparting rotational force to the impeller 4. ,
The impeller 4 rotates.

For example, for a total number of 6 to 8 axial flow blades, 1 to 2 of the axial flow blades 3 are used as sample collection blades 7, and the sample collection blades 7 have a different inclination direction from the axial flow blades 3, The tip of the slope of the blade 7 has an opening opening into a sample collection flow path 8 different from the flow path 6 to be measured.

FIG. 1(a) shows a state in which the object to be measured 5 collides with the axial flow impeller 3 and flows down inside the flow path to be measured, causing the impeller 4 to rotate. FIG. 1(b) shows that due to the rotation of the impeller 4, the object to be measured 5 flows down the sample collection blade 7.
A state in which the flow F flows in the direction of inclination of the sample collection blade 7 and flows through the sample collection channel 8 is shown. At this time, the flow object becomes sample 9.

With the configuration of the present invention described below, the sampler of the present invention has the following effects.

■ The rotation speed of the blade nid 4 is determined depending on the meteor of the object to be measured.

(2) If the total number of axial flow blades 2 is N and the number of sample blades 7 is m, a sample 9 with a reduction ratio m/N is obtained.

(2) Sample 9 is sampled intermittently and continuously from the object to be measured 5, and is highly reliable as a representative sample of the object to be measured.

(4) If the samplers of the present invention are connected in series as shown in FIG. 4, accurate samples with high reduction ratios can be obtained.

■ When the flow rate of the object to be measured changes, it is preferable in terms of sample accuracy that the rotation speed of the impeller 4 immediately changes in proportion to the flow rate. Compensates for the delay in the change in rotational speed due to

〔Example〕

1 to 7 show samplers according to embodiments of the present invention.

The sampler of the present invention consists of a rotary impeller 4 having a special structure in which a rotating shaft 2 is supported by a support part 14, and a hopper part 8 for taking out the sample collected by the rotary impeller 4. 6 to 8 minutes in the circumferential direction of 4; 11 (8 in the illustration)
Example of division) A path 6 is set in the - section so that the object to be measured 5 falls straight down.

The rotary vane 4 is divided into 6 to 8 parts in the circumferential direction, and each part is divided into 1
Each section is equipped with axial flow blades 3 having an inclination of 6 right angles = 15 to 45 degrees, one-sixth of which (in the case of 6 divisions).
Or the blade of the 1/8th division part is blade + l (toward the center,!
! A sampling blade 7 is formed with an inclination of , and only the object to be measured that falls onto the sampling blade 7 is guided to the sample collection channel 8 and becomes a sample 9.

The rotary impeller 4 is supported by the water moat at the support part 14.

It is set so that it can rotate freely with as little resistance as possible, and when the measured object 5 falls onto the axial flow blade 3 as shown in FIG. 3 and flows in the direction of arrow 11 in Fig. 2, the falling energy causes a reaction force on the axial flow blade, and the water component force causes the rotating blade 4 to move in the direction of arrow 12. Rotate. This principle is, so to speak, the same as that of the city and windmills.

In the experimental example, the vertical falling speed of the object to be measured 5 is V = 3 to 5 m.
/ s Te drop 'FIQ=50 When t7h is set, when the measured object 5 falls on the inclined part (0=45°) of the axial flow vane 3, the force perpendicular to the inclined part F=-XVXs i n0=3 ~5kg...(1) However, V=3~5m/5 Q=50t/h, and the rotational force P is P=Fs in45°=2.12~3.5kg...
(2) Sufficient rotational force was generated to rotate the blade IF.

This rotational force is proportional to the amount of missing pieces Q of the object to be measured, as shown by IJI from equation (1), so when the missing pieces change, the rotational speed also changes.

Therefore, if the medium hourly transport fee of the object to be measured changes, the sample will also be sampled accordingly! , :, becomes.

In addition, for sampling r-, a sample of 176 divisions or 1/8 division is sampled every time the rotary impeller rotates once, but if necessary, samples can be divided into 2/6 division, 2/8 division, I3 division, etc. By changing the divided locations sampled, and by appropriately setting the angle of inclination of the axial flow vane 3, the object to be measured can fall. : The rotational force also changes, and the sampling time interval also changes.

Therefore, proportionality and reduction operations according to the iM Fa of the object to be measured, which are necessary conditions for a sampler, can be performed at once. Furthermore, since no special drive device is required, there are fewer restrictions on installation conditions.

Moreover, by installing this device in combination with several Ml as shown in FIG. 4, the reduction ratio can be further increased.

In FIG. 4, the sampler la is the largest in size, and as the samplers 1b and 1c increase, the device size gradually decreases to approximately 1/6 to 1/8. When three samplers with 176 divisions are connected in series, the final sampling F
M is about 1/216 of the flow rate of the object to be measured, and with three 1/8-dividing samplers, it is reduced to 11512 and extracted.

Secondly, the sampler of the present invention does not have a driving mechanism and has a structure in which it rotates by the inertia of the falling object.

Particularly when the number of objects to be measured rapidly decreases, there may be a delay in tracking the rotational speed of the rotating body due to inertia.
A rotation speed adjusting device 14 as shown in FIGS. 7 to 7 is attached to the shaft 1.

The structure of the device 14 of the embodiment is a double cylinder structure, and the inner cylinder 15 is provided with an opening 17 around the circle of the F section, and the outer wall of the inner cylinder 15 and the inner wall of the outer 1316 are provided with fin-shaped blades. 18 are provided.

In addition, the outer cylinder 16 has a cut edge with the cylinder 15, and the frame 1
It is fixed at 9. A liquid 20 having a certain degree of viscosity (for example, acupuncture oil) is filled below the attachment part of the fin-shaped blade 18 in the inner cylinder 15, and the inner cylinder 15 is connected to the rotating shaft 2 of the rotating blade.

When the connected rotating shaft 2 is in a stationary state, the level of the liquid 20 is the same in both the inner and outer cylinders as shown in FIG.
When the rotating shaft 2 rotates and the inner cylinder 15 also begins to rotate, a centrifugal force is generated in the liquid 20, and as shown in FIG. The liquid level in the outer cylinder 16 rises by L.

As the rotation of the inner cylinder increases, the liquid level inside the outer cylinder further increases due to the large centrifugal force, and finally reaches the mounting position of the fins 18 on the inner and outer cylinders. This creates resistance to the rotational force of the inner cylinder. The shape of the fins is such that as the liquid level rises, the resistance force increases proportionally.

As a result, braking torque acts on the rotational force of the inner cylinder at a point where the rotational speed is high to a certain extent, so when this rotational speed adjustment device is installed on the sampler mentioned above, if the object to be measured suddenly decreases, the rotation of the rotary impeller will also stop. Since the sustaining force due to inertia is small, the speed will be reduced accordingly.

In the examples shown in Figures 5 to 7, we have given an example of a rotation speed adjustment device using a liquid, but it is also possible to use an electromagnetic device that uses eddy current, a device that uses the centrifugal force of a weight, etc.
It's me.

〔Effect of the invention〕

According to the sampler of the present invention, highly accurate sampling can be automatically performed without using a complicated device.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a sampler according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the same, FIG. 3 is a sectional view taken along the line A-A in FIG.
FIG. 5 is a longitudinal sectional view of the rotation speed adjusting device of the embodiment, FIG. 6 is a cross-sectional view thereof, FIG. 7 is a longitudinal sectional view showing the operation, and FIG. 8 is a schematic diagram of a conventional sampler. 1... Sampler 2... Rotating shaft 3... Axial flow vane 4... Vane 11 (5... Covered constant object 6... Measuring flow channel 7... Sample collection vane death)・Sample collection channel (hopper part) 9...Sample 11.12.13...Arrow 14...Rotation speed adjustment device 15...Inner cylinder 16...Outer cylinder

Claims (1)

[Claims] 1. An impeller is formed by attaching a large number of axial flow impellers having a pitch angle in one direction with respect to the axis in a radial direction around a rotatable shaft, and the object to be measured is attached to the impeller. A passage passing through one part in the axial direction is provided, one part of the blades is inclined in a different direction from the other blades, and an outlet separate from the passage is provided beyond the slope. Sampler for powders and fluids. 2. The sampler for powder and fluid according to claim 1, wherein a rotation speed adjusting device is attached to the rotating shaft.