JPH07190902A - Constant quantity sampler for powder and granular material - Google Patents

Abstract

PURPOSE:To sample a powder and granular material with high accuracy in the quantity and reduction by sampling a powder and granular material flowing through a process pipe, dropping the sampled material down to the outside of the pipe, and taking out as a sample while regulating the carrying quantity at a constant level. CONSTITUTION:A screw feeder body 10 drives a rotary actuator R and the body 10 is rotated by one half revolution thus directing a sampling port 11 upward. Motors M for driving a screw and a drum are then actuated to start sampling. A power and granular material sampled at the sampling port 11 is shifted,through the rotation of a screw 13, to a falling port 12 thence pushed to fall down onto the outer peripheral surface of a carrying drum 14 disposed in the space A thus heaping up a groove made therein. The powder and granular material is carried through the rotation of the drum 14 and wears away at a wearing part 16 before the total quantity is sucked into a l suction pipe 18. It is then carried, along with the air, to a sample receiver through a discharge pipe 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for quantitatively collecting powder and granules, and more particularly to an apparatus for quantitatively collecting powder and granules capable of continuously sampling with a constant sampling amount.

[0002]

[Prior Art and Problems to be Solved by the Invention] Flour,
In the technical field dealing with powdery particles such as powdery polymers and toners, it is necessary to collect a predetermined amount of powdery particles as a sample from a process tube at regular intervals or continuously and analyze the sample. It is important for process control and quality control.

As a conventional method of collecting a sample of powder or granules from a process tube, a method of taking out the powder or granules collected in the process tube by a screw or a method of collecting the powder or granules in a cup in the process tube is used. There is a method of taking out the powder or granules from the process pipe by moving the cup filled with the powder or granules to the outside of the pipe.

The powder or granules transported to the outside of the process tube are pneumatically transported to an analysis means such as a particle size analyzer using an ejector, or are collected in a sampling container.

When continuously transporting the sample to the outside of the process tube, the screw method is widely adopted. In the conveying means using the screw, the amount of powder or granules collected per certain period of time can be adjusted to some extent by controlling the hole diameter and the rotation speed of the screw.

However, when the concentration of the powder or granules flowing through the process pipe changes, even if the rotation speed of the screw is kept constant, the amount of powder or granules collected cannot be kept constant. Such a variation in the amount of powder or granules collected is particularly problematic when continuously analyzing the properties of the powder or granules flowing in the process pipe. That is, if the collected powder and granules are directly conveyed to the analyzer and the conveyed powder and granules are used as a sample for analysis as they are, the amount of sample changes due to the change in the amount of powder collected. Therefore, a measurement error occurs and stable and accurate measurement cannot be performed. Further, when the concentration of the powder or granular material in the process tube is drastic, the amount of the sample used for the analysis also fluctuates greatly, and the analysis itself may become impossible due to deviation from the measurable range of the analyzer. .

Further, in order to collect a representative sample of the powder or granules flowing in the process pipe, the powder or granule sample taken out from the process pipe is stored in the compactor, and the interior of the compactor is sufficient. After agitating, it is necessary to collect a predetermined amount of powder and granules from the reducer.

However, the demultiplexer has the drawbacks that the structure is complicated and the cost is high. further,
The present invention, which has the problem that a treatment means for that is necessary because the part of the powder or granules conveyed into the sizing device that has been eliminated in the sizing process is discarded. It was done to solve it. That is, an object of the present invention is to provide a powdery-particles quantitative sampling device capable of sampling powdery granules with good quantification and fractionation.

[0009]

One of the inventions for solving the above-mentioned problems is to collect a powder or granular material flowing in a process pipe and drop the powder or granular material outside the process pipe; Transporting means for receiving and transporting the incoming powder and granules, transporting amount regulating means for regulating the transporting amount of the aggregate of powdery particulates transported by the transporting means, and transporting amount regulating means for regulating the transporting amount. A granular material quantitative sampling device characterized by comprising a granular material extracting means for collecting an aggregate of the granular material that is conveyed after, another invention for solving the above-mentioned problems, The powder / granule collecting means, the carrying means, the carrying amount regulating means and the powder / granular material take-out means according to claim 1, and the powder / granular material returning means for returning the powder / granular material that cannot be received by the carrying means into the process pipe Means and powders comprising It is a quantitative sampling device.

[0010]

In the powdery particle quantitative sampling device, the powdery material conveyed in the process tube is sampled from the process tube by the powdery particle collecting means. The collected granular material is dropped onto the conveying means outside the process tube by the granular material collecting means. The dropped granules are conveyed, and the conveyance amount regulating means regulates the conveyance amount of the powder grains to a predetermined amount. The granular material regulated to a predetermined amount is sampled by the granular material extracting means.

According to this apparatus for quantitatively collecting powder and granules, a fixed amount of powder and granule sample is constantly sampled. Moreover, unlike the conventional method in which a sample is taken from a process tube by a screw, for example, the conveyance amount regulating means regulates the conveyance amount of the granular material, and the regulated aggregate of the granular material is used as a sample powder. Since a predetermined amount of granules is collected by the powder take-out means, it is possible to perform a reduction operation.

In the powdery-particles quantitative sampling device of another invention, in addition to the above, among the powdery-grains dropped by the powdery-particles collection means toward the transportation means, the particles not received by the transportation means. The body is returned to the process tube by means of the powder and granular material returning means.

Therefore, according to this quantitative use apparatus for powder and granular material, not only is a constant quantity of powder and granular material sample collected, but also the powder and granular material collected by the powder and granular material collecting means is not wasted. .

[0014]

【Example】

(Embodiment) A powdery / quantitative material quantitative sampling device according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the powdery / quantitative material quantitative sampling device is provided on the peripheral surface of a process pipe P which is a vertically standing conduit. That is, the outer peripheral surface of the process pipe P is provided with an opening having the flange 2 at the peripheral end. The flange 2 and the flange 4 provided at the end of the one end opening of the outer case 3 in the powder and granular material sampling device are overlapped and tightly coupled to each other, so that the process pipe is provided on the peripheral surface of the process pipe P. This device is mounted in a direction orthogonal to the axis of P.

At the lower end of the opening of the process tube and the lower end of the opening of the outer case of the present apparatus, a slope 5 is formed so that they form one slope.
And a slope 6 is formed.

The one end opening of the outer case 3 on the side of the process pipe P in this powdery granular material sampling device covers a large part of the one end opening, and is the lower end of the one end opening of the outer case 3. A shielding plate 7 having a lower end side with a predetermined interval is provided. Further, in the inside of the outer case 3 and in the direction opposite to the process pipe P from the shielding plate 7, a lower end side which is parallel to the shielding plate 7 and is connected to an upper end side of the slope 6 is formed. A partition 8 having the same is provided.

The partition wall 8 is integrated with the slope 6 so that the inside of the outer case 3 is surrounded by the space A on the process pipe P side.
And a space B on the opposite side of the process pipe P.

Circular through holes sharing the axis are formed in each of the shielding plate 7 and the partition wall 8, and bearings 9 are provided in both through holes. The axis line is orthogonal to the shielding plate 7 and the partition wall 8.

A cylindrical screw feeder body 10 penetrating both through holes 9 and supported by the bearings is mounted. The tip of the screw feeder body 10 is located inside the process pipe P.

On the upper surface of the end of the screw feeder main body 10 located inside the process pipe P, there is provided a powdery or granular material sampling port 11 for taking in the powdery or granular material circulating in the process pipe P. At a place located in the space A, the process pipe P is opened downward.
A dropping port 12 is provided for dropping the powdery particles collected inside and moving in the screw feeder main body into the space A.

The opening of the powder / granule sampling port 11 is
The powder particles are opened in a plane orthogonal to the flow direction, and the drop port 12 is opened in a direction in which the powder particles are smoothly dropped. Therefore, when the process pipe P is erected vertically,
Since the granular material falls in the vertical direction,
The opening of the powder and granule sampling port 11 is opened right above, and the drop port 12 is opened right below, for example.
Further, when the process pipe P is inclined, the opening of the powder / granule sampling port 11 opens in a direction orthogonal to the flow direction of the powder / granule flowing in the oblique process pipe P.
The drop port 12 opens, for example, right below.

The movement of the powder or granular material in the screw feeder main body 10 is carried out by rotationally driving the screw 13 arranged in the screw feeder main body 10. The screw 13 is driven by rotating a screw shaft projecting from a through hole provided in an end portion of the screw feeder main body 10 located in the space B by a screw driving motor M.

Further, the screw feeder main body 10
A rotary actuator R that rotationally drives the screw feeder body itself is connected to an end portion located in the space B. As shown in FIGS. 2 and 3, a concave groove 20 facing the powder falling direction is formed on the outer peripheral surface below the drop port 12, and the columnar groove is rotatable about the axis. A powder / granular material conveying drum 14 is provided.

The rotation of the powder / particle conveying drum 14 is performed by a powder / particle conveying drum driving motor M, one end of which is inserted and fixed in a through hole provided in the central portion thereof and the other end of which is arranged in a space B. This is performed by driving the connected rotating shaft 15.

A through hole for the rotary shaft 15 is formed in the partition wall 8, and further, on the space A side of the partition wall,
As shown in FIG. 4, a scraping plate having a scraping portion 16 that comes into contact with the outer peripheral surface of the powder / granular material conveying drum 14 at a position slightly displaced from the top of the powder / granular material conveying drum 14 in the rotational direction thereof. 17 is attached.

A tip portion of a suction pipe 18 is arranged at a position further offset in the rotational direction from a position on the outer peripheral surface of the powder / granular substance transporting drum 14 where the scraping portion 16 contacts. A suction port 19 is provided at the tip of the suction pipe 18 and opens in the direction toward the rotation direction.
The suction port 19 is disposed inside a concave groove 20 formed on the outer peripheral surface.

The tip portion of the suction pipe 18 has the concave groove 2
0 has a structure capable of completely taking in the granular material, for example, a gutter structure having a bottom surface and both side surfaces in contact with the bottom surface and both side surfaces of the concave groove 20.
Other than the above-mentioned tip portion, it has a cylindrical structure.

The suction pipe 18 penetrates the partition wall 8 as shown in FIG.
It is also connected to the ejector 23 to which the discharge pipe 22 is connected.

A control valve 24 and a control valve 25 are provided on the air supply pipe 21 and the discharge pipe 22, respectively. For example, a sample receiving container may be arranged at the end of the discharge tube 22 to which the powdery or granular material is conveyed, or a sample preparation container of a particle size analyzer may be used.

Reference numeral 26 denotes a vibration device for vibrating the slope 6 to smoothly roll or slide the powder on the slope.

In the above-described embodiment, the powder and granular material collecting means of the present invention has the screw 13 built therein, the screw feeder main body 10 having the powder collecting port 11 and the dropping port 12, and the screw for rotationally driving the screw 13. It is configured to have a drive motor M and a rotary actuator R that rotationally drives the screw feeder body 10. The transport means in this invention is
Rotatable powder / granular material conveying drum 14 having a concave groove 20
It is configured with. The conveying amount regulating means in the present invention comprises a concave groove 20 formed on the peripheral surface of the powder and granular material conveying drum 14 and a scraping plate 17 having a scraping portion 16. The powder / granule extracting means according to the present invention includes an intake pipe 18 having an intake port 19 at its tip, an air supply pipe 21, a discharge pipe 22, an ejector 23, and a control valve 24. The powdery or granular material returning means in the present invention comprises a slope 5, a slope 6, a shield plate 7, and the partition wall 8.

Next, the operation of the powdery-particles quantitative sampling device of this embodiment will be described.

As an initial state, it is assumed that a predetermined powder or granular material steadily flows and falls in the process tube P, but a sample is not collected. Process pipe P
The powder-and-granule sampling port 11 in the inside stands by in a state of being opened downward so as not to collect the powder-and-granule.

When the sampling is started, first, the screw feeder main body 10 drives the rotary actuator R connected to the end portion, and the screw feeder main body 10 is rotated half a turn around the axis thereof, whereby the powdery or granular material is obtained. The collection port 11 is directed upward.

At the same time, the screw driving motor M
And the drum driving motor M for conveying the granular material are activated.
As a result, the powder / granule sampling port 11 faces upward, whereby the sampling of the powder / granular substance is started. The screw that rotates the powder collected in the powder collecting port 11
It moves toward the drop port 12 by the rotating action of 3. When it reaches the drop port 12, the drop port 1
It is extruded from 2 and falls into the space A outside the process P pipe.

The powder and granules extruded from the drop port 12 are transferred to the powder and granule conveying drum 1 as shown in FIG.
4 drops onto the outer peripheral surface.

At this time, even if the concave groove 14 provided on the outer peripheral surface is filled with the amount of the powder or granular material that has fallen onto the outer peripheral surface at the point where the powder falls, that is, FIG. The rotation speed of the screw and the rotation speed of the powder / particle conveying drum 14 are adjusted so that the piled-up state F as shown in FIG.

The powder or granules piled up on the outer peripheral surface in a heaped state F are conveyed in the rotation direction of the powder or granule conveying drum 14 as it rotates. The concave groove 20 is formed by the scraping portion 16 of the scraping plate 17 that contacts the outer peripheral surface.
The part that has accumulated above the height of the outer peripheral surface is scraped off,
Only the powder or granular material present inside the concave groove 20 is conveyed to a position beyond the scraping plate 17.

FIG. 2 shows a state in which the powder and granules are piled up in the piled-up state F, and FIG. 3 shows a state in which the piled up powder and granules are scraped off by the scraping section 16. 2 and 3
[Fig. 4] is a sectional view taken along the line AA and a sectional view taken along the line BB in Fig. 4, respectively.

The whole amount of the powdery particles conveyed to the position beyond the scraping plate 17 is from the suction port 19 to the suction pipe 1.
8 is inhaled. This suction is performed by the ejector 23 connected to one end on the opposite side of the suction pipe 18. That is, the ejector 23 is driven with the control valve 24 in the "open" state, and high-speed air is sent from the air supply pipe 21, whereby the powder or granular material in the concave groove 20 is sucked into the suction port 19, The sucked powdery particles are guided through the discharge pipe 22 together with air. The particles discharged together are conveyed to, for example, a sample receiving container or a sample preparation container of, for example, a particle size analyzer.

A portion of the powder or granules extruded from the dropping port 12 of the screw feeder body 10 that has not fallen to the outer peripheral surface of the powder or granule conveying drum 14,
After the drop, the part scraped off by the scraping plate 17 further drops to drop on the slope 6.

The total amount of the dropped particles is returned to the process pipe P by sliding down on the slope formed by the slope 6 and the slope 5. Therefore,
It is possible to collect only the amount necessary for analysis and the like, so that there is no waste.

When the sampling is interrupted, the suction from the suction pipe 18 may be stopped.
The whole amount of the powder particles that fall outside returns to the process pipe P.

By maintaining the driving of the screw 13 and the powdery or granular material transporting drum 14 even during the interruption, it is possible to perform stable quantitative sampling instantly after the sampling is restarted.

At the time of stopping the suction, if the control valve 25 provided in the discharge pipe 22 is closed without stopping the blowing of air from the air supply pipe 21, the suction pipe 1 will be reversely operated at the time of sampling.
Air can be jetted from the suction port 19 in 8. Therefore, it is possible to prevent the powder particles from sticking to the concave groove 20 during the interruption of the collection. Also,
It is particularly useful to take such measures during interruptions if the sample is highly adsorbent.

When the sampling is not performed for a long period of time, the screw feeder main body 10 is rotated half a turn by the rotary actuator R so that the sampling port 11 faces downward and then the power of the apparatus is turned off. In addition, it is possible to prevent the powder or granules from sticking or accumulating in the collection port 11.

(Modification) The present invention is not limited to the above-mentioned embodiment, and design changes can be appropriately made within the scope of the gist of the present invention.

The granular material collecting means in the present invention has various concrete configurations as long as it has a function of collecting the granular material flowing in the process tube and transferring the collected granular material to the conveying means outside the process tube. Can be adopted. However, as the powder and granular material collecting means, the powder and granular material receiving means for receiving the powder and granular material flowing in the process tube, and the powder and granular material for transferring the powder and granular material received by the powder and granular material receiving means to the outside of the process tube. It can be configured by including a body transferring means and a powdery or granular material moving means for moving the powdery or granular material transferred to the outside of the process tube to the conveying means.

Regarding the above-mentioned embodiment, the structure having the screw feeder main body 10 and the powdery or granular material sampling port 11 therein corresponds to the powdery or granular material receiving means, and is rotatable inside the screw feeder main body 10 or inside thereof. The configuration including the screw 13 corresponds to the powdery or granular material transferring means, and the configuration including the screw feeder main body 10 and the drop port 12 provided therein corresponds to the powdery or granular material moving means.

As another structure of the powdery or granular material collecting means in the present invention, for example, a belt conveyor system as shown in FIG. 5 may be adopted.

The means for collecting powder and granules shown in FIG. 5 is one rotating means arranged in the process pipe P, for example, the rotary gear 50.
And the other rotating means, such as the rotating gear 51, disposed inside the outer case 3 provided outside the process pipe P and between the shielding plate 7 and the partition wall 8, and the both rotating gears 5.
A belt 5 which is endlessly stretched between 0 and 51 and is arranged through an opening window 52 provided in the shielding plate 7.
3, the belt 53 is rotated in the direction of the arrow in FIG. 5 by the rotational drive of the rotary gears 50, 51, and the powder particles accumulated on the belt 53 are transferred between the shielding plate 7 and the partition wall 8. It is also possible to use a configuration in which it is made to fall in the space.

In the granular material collecting means shown in FIG. 5, the granular material receiving means is composed of a part of the belt 53 arranged in the process pipe P, and the granular material received by the granular material receiving means. The powder and granular material transferring means for transferring the body to the outside of the process tube P is constituted by a belt 53 which moves on an endless track by both rotary gears 50 and 51, and transfers the powder and granular material transferred to the outside of the process tube P to the conveying means. The powdery or granular material moving means is a shield plate 7.
And a part of the belt 53 and the rotating gears 50 and 51 located between the partition wall 8 and the partition wall 8.

As another structure of the powdery or granular material collecting means in the present invention, for example, a cup collecting system as shown in FIG. 6 may be adopted.

The powdery and granular material collecting means shown in FIG. 6 has a rear end located outside the process pipe P through a front end located inside the process pipe P and an opening 60 provided in the pipe wall of the process pipe P. Supporting rod body 61 having a portion, and the rotating support rod body 6
No. 1 first cover member 62 mounted on the tip end portion, and the rotary support rod body so as to close the opening 60 when the tip end portion of the rotary support rod body 61 is positioned in the process pipe P. A second lid member 63 provided in the central portion of 61, the first lid member 62 and the second lid member 62 in the rotation support rod 61.
A cup 64 provided at an intermediate portion of the lid member 63, a shaft rotation driving means (not shown) for rotating the shaft of the rotation support rod 61, and a second lid member 63 cover the opening 60. As described above, the rotary support rod 61 is moved forward, and the rotary support rod 61 is moved backward and forward so that the first lid member 62 covers the opening 60. Consists of

In this granular material collecting means, the granular material receiving means is the cup 6 mounted on the rotary support rod 61.
4, the powder and granular material transferring means for transferring the powder and granular material received by the powder and granular material receiving means to the outside of the process pipe P is a cup 64 mounted on the rotary supporting rod body 61 and a rotary supporting rod body. 61 and the rotary support rod forward and backward driving means, and the powder and granular material moving means for moving the powder and granular material transferred to the outside of the process pipe P to the conveying means is the rotary support rod body 61 and this rotary member. It comprises a cup 64 mounted on the support rod 61 and the shaft rotation driving means.

The powder / granule collecting means shown in FIG. 6 has the following functions. That is, when the cup 64 mounted on the rotary support rod 61 is faced upward and the cup 64 is arranged inside the process pipe P, the powder and granules flowing in the process pipe P are accumulated in the cup 64. It At this time, the second
Since the lid member 63 closes the opening 60, the powder or granules flowing in the process tube 60 will not be scattered outside the process tube P. When the powder and granules are accumulated in the cup 64, the rotary support rod body forward / backward drive means is driven to rotate the rotary support rod body 61.
Is moved backward, and when the first lid member 62 closes the opening 60, the backward movement of the rotation support rod body 61 is stopped. Next, the rotation support rod 61 is driven by driving the shaft rotation drive means.
The shaft 64 is rotated so that the cup 64, which has been facing upward, is rotated downward. When the cup 64 faces downward, the powder particles inside the cup 64 drop downward. Then, the conveying means body arranged below receives the falling powder particles.

As another specific example of the powdery or granular material collecting means in the present invention, a system using a cup rod as shown in FIG. 7 may be adopted.

In the powdery or granular material collecting means shown in FIG. 7, the tip portion is located inside the process tube P, the concave portion 70 is provided in the vicinity of the tip portion, and the opening portion 7 formed in the peripheral surface of the process tube P is provided.
1, a cylindrical cup rod body 72 having a rear end portion located outside the process pipe P and a rotatably supporting the cup rod body 72 in the opening 71, A first bearing mechanism 73 that isolates the cup rod body 72, a second bearing mechanism 74 that rotatably supports the cup rod body 72 outside the process pipe P, and a forward / backward drive mechanism 75 that moves the cup rod body 72 back and forth, such as an air cylinder. And a shaft rotating mechanism (not shown) for rotating the cup rod body 72 about its axis.

In the granular material collecting means shown in FIG. 7, the granular material receiving means is the concave portion 7 formed in the cup rod body 72.
The powder / granular material transferring means for transferring the powder / granular material received by the powder / granular material receiving means to the outside of the process pipe P includes a cup rod body 72, a concave portion 70 provided therein, and a forward / backward drive mechanism. 75, and the granular material moving means for moving the granular material transferred to the outside of the process pipe P to the conveying means is provided with the cup rod body 72, the recessed portion 70, and the shaft rotating mechanism. To be done.

The operation of the powdery or granular material collecting means shown in FIG. 7 is as follows. That is, first, by driving the forward / backward drive mechanism 75, the cup rod body 72 is moved forward to move the concave portion 7
0 is located in the process pipe P, especially in its center.
When the concave portion 70 is arranged in the process pipe P, the powder particles flowing and falling in the process pipe P are accumulated in the upward concave portion 70. Next, the forward / backward drive mechanism is driven to alternate the cup rod body 72, and the cup rod body 72 is pulled out from the process pipe P until the concave portion 70 is located outside the process pipe P. After the forward / backward drive mechanism is stopped, the shaft rotating mechanism is driven to make the concave portion 70, which was facing upward, face downward. The granular material falls from the concave portion 70 that faces downward.

As another specific example of the powder / granule collecting means in the present invention, a pipe flow system as shown in FIG. 8 may be adopted.

The powder / granule collecting means shown in FIG. 8 has an upward opening 80 that opens upward in the process pipe P and a shield plate 7.
Slanting tube 81 penetrating obliquely, the shielding plate 7 and the partition wall 8
And a downward opening portion 82 that opens downward in a space between and. The shield plate 7 and the partition wall 8 have the same structure as in the embodiment shown in FIG. Therefore, the slope 6 extending from the lower end of the shield plate 7 and the lower end of the partition 8 and the slope 5 following it.
An opening space is formed between and.

In this powder / granule collecting means, the powder / granular material receiving means is constituted by the upward opening portion 80 of the oblique pipe 81, and the powder / granular material received by the powder / granular material receiving means is moved to the outside of the process pipe P. The transferring means for transferring the granular material is constituted by the oblique pipe 81, and the moving means for transferring the granular material transferred to the outside of the process pipe P is the downward opening portion 82 of the oblique pipe 81. Composed of.

In the powder and granule collecting means shown in FIG. 8, since the upward opening 81 of the oblique pipe 80 is opened in the process pipe P, a part of the powder and granules flowing through the process pipe P falls. Is taken into the inside of the oblique tube 81 from the upward opening 80, and the taken-in powder particles fall in the oblique tube 81, and from the downward opening 82, the space between the shielding plate 7 and the partition wall 8. Fall inside. The granular material falling from the downward opening portion 82 is received by the conveying means arranged directly below the downward opening portion 82. The granular material which has not been received by the conveying means is returned into the process pipe P through the opening space.

As the conveying means in the present invention, it is possible to receive the powdery particles collected by the powdery particle collecting means in the process tube and falling outside the process tube, and to cooperate with the transfer amount regulating means described later. The structure is not particularly limited as long as it has a function that can be performed. As the conveying means, in addition to the structure in the embodiment shown in FIG. 1,
It is also possible to employ a belt conveyor, a cylindrical drum having no recessed groove, or the like. When adopting a belt conveyor as the conveying means, so that the conveying surface of the belt conveyor is horizontal, and yet at the one end of the belt conveyor, it is possible to receive the granular material falling from the granular material collecting means, It is preferable that the positional relationship between the belt conveyor and the powder and granular material collecting means is adjusted. When a cylindrical drum is adopted as the conveying means, the cylindrical drum is rotatably formed, and its rotation axis is arranged horizontally, and the powder or granular material falling from the powder or granular material collecting means is placed on the peripheral surface of the cylindrical drum. It is preferable that the positional relationship between the cylindrical drum and the powder and granular material collecting means is adjusted so as to drop.

The transport amount regulating means in the present invention is not particularly limited in its structure as long as it is possible to regulate the amount of the aggregate of powdery particles conveyed by the transporting means, and various structures are considered. be able to.

As a specific example of the transport amount regulating means in the present invention, as shown in FIGS. 9 and 10, it has a rotating shaft 90 which is horizontally arranged and rotatable, and has a groove on its peripheral surface. No cylindrical drum 91 in cylindrical drum 91
At a position lower than the highest position of the cylindrical drum 91, and a notch concave portion 93 in which an opening 92 is formed by the peripheral surface of the cylindrical drum 91 and the lower end surface of the granular drum 91. The quantity regulating member 94 can be mentioned. Note that FIG.
Further, in FIG. 10, reference numeral 95 indicates the notch concave portion 93 in the powder or granular material conveyed on the peripheral surface of the cylindrical drum 91.
A surplus portion that does not pass through is a powdery or granular material overflow prevention plate that restricts the powdery or granular material amount restricting member 94 from overriding.

The powdery or granular material amount regulating member 94 drops onto the peripheral surface of the cylindrical drum 91 due to the opening area of the notched concave portion 93, and the notched concave portion 9 is rotated by the rotation of the cylindrical drum 91.
The amount of powder or granules conveyed toward No. 3 passing through the cutout recess 93 is regulated. Therefore, the amount of powder or granular material to be transported is regulated to a predetermined transport amount by the powder or granular material amount regulating member 94.

Although not shown, when the conveying means is a belt conveyer, the conveying amount is regulated by a groove having a concave cross section formed on the conveying surface of the belt conveyer and a scraping plate slidably contacting the upper end surface of the groove. It is also preferable to configure the means. Further, when the groove is not formed on the conveyor surface of the belt conveyor, the granular material is provided with a notched concave portion capable of forming an opening at the lower end portion slidingly contacting the conveyor surface of the belt conveyor and the conveyor surface of the belt conveyor. It is also preferable that the amount regulating member constitutes the conveying amount regulating means.

The shape of the cutout recess shown in FIGS. 9 and 10, the cross-sectional shape of the groove of the scraping plate arranged on the velcot conveyor, and the shape of the cutout recess in the powder and granular material amount regulating member are quadrangular. It may be semicircular or triangular, and is arbitrary.

There is no particular limitation on the means for taking out the granular material in the present invention, as long as the granular material after being regulated by the conveying amount regulating means can be taken out from the conveying means by a predetermined amount.

For example, as shown in FIG. 9, as another specific example of the powder / granule extracting means, a collecting tube having an extracting tube 100 and a transfer tube 101 can be used.

The take-out pipe 100 is a cylindrical drum 9
1 has a tip rake portion 102 in sliding contact with the peripheral surface of the cylindrical drum 91, and the tip rake portion 102 is arranged at a predetermined inclination angle so that the powder or granular material scooped from the peripheral surface of the cylindrical drum 91 can be slid down. It will be done. The take-out tube 100 may be tubular as a whole except for the tip scoop portion 102, or may be a gutter-like shape, for example, a U-shaped cross section. The take-out pipe 100 has a transfer pipe 101 at the end opposite to the tip scoop portion 102.
Is rotatably connected to. This take-out pipe 100
The tip rake portion 102 is retracted from the peripheral surface of the cylindrical drum 91 when it is not necessary to take out the granular material from the peripheral surface of the cylindrical drum 91. The tip scooping portion 102 moves
Is capable of sliding contact with the peripheral surface of the cylindrical drum 91.

It is desirable to provide a tooth of the powder and granular material quantitative sampling device of the present invention and a cleaning means capable of removing the powder and granular material remaining on the conveying means without being taken out by the powder and granular material taking out means. If the cleaning unit is provided, the transport unit that receives the powder or granular material in the transport unit can be always cleaned. Therefore, even if the powder or granular material is changed, The grade has changed,
Even if the granular material has the same grade, the characteristics of the granular material, such as the particle size distribution, may change due to changes in manufacturing conditions. It is possible to prevent the occurrence of contamination by the particles.

The apparatus for quantitatively collecting powder and granules according to the present invention is capable of cleaning the conveying portion of the conveying means, that is, the conveying portion which receives the powder and granular material falling from the means for collecting powder and granular material, and the powder by the conveying amount regulating means. The structure is not particularly limited as long as it does not hinder the regulation of the amount of particles and does not hinder the collection of the particles by the particle extracting means.

As one specific example of the cleaning means, for example, a conveying part in the conveying means, for example, the powder / grain conveying drum 14 is used.
(See FIG. 4) Air blowing means for blowing air into the recessed groove 20 (see FIG. 4) to blow away the remaining powder or granules, and as shown at 35 in FIG. An example of the conveying unit rubbing means includes a rubbing brush.

The air ejecting means is composed of, for example, the intake pipe 18, the air supply pipe 21, the ejector 23, and the control valve 25 provided in the exhaust pipe 22 in the powdery granular material quantitative sampling device shown in FIG. By closing the control valve 25 at the time of cleaning the transport section,
By introducing the air blown from the air supply pipe 21 into the suction pipe 18 and injecting the air from the suction port 19, the transport portion can be cleaned.

The powder or granule in the present invention is not limited to a specific powder or granule, and examples thereof include pigment powder, dye powder, coal, wheat flour, food powder, organic substance powder and toner.

If the powdery-particles quantitative sampling device of the present invention is connected to various powdery-particles analysis devices, such as a particle size distribution measuring device, various powdery particles can be analyzed, for example, automatic quantitative analysis of particle size distribution measurement. It is possible and preferable.

[0080]

According to the powder quantitative sampling device of the present invention, a certain amount of powder or granules can be stably sampled per hour. The fixed amount can be set to a desired amount by adjusting the conveying speed of the powder and granular material conveying means and the conveying amount regulating means.

Therefore, when a certain amount of powder or granules is required, it is possible to carry out quantitative sampling with extremely excellent quantitativeness by a simple control of adjusting the sampling time. In addition, by transporting the entire amount of the powder or granular material sampled by the powder or granular material quantitative sampling device to the analyzing device or the like, a fixed amount of the analysis sample can be supplied to the analyzing device or the like per hour.

According to this powder / particle quantitative sampling device, a fixed amount can be stably supplied to the analytical sample. Therefore, in various powder / particle analytical devices to which the sample is supplied by this powder / particle quantitative sampling device, It is possible to perform analysis by setting conditions such as optimum sensitivity according to the supply amount, and improvement of analysis accuracy is achieved.

The powder or granules collected by using the powder quantitative sampling device of the present invention can be handled as a representative sample of the powder or granules flowing in the process pipe. for that reason,
It does not require the demultiplexer that was required in the past. Therefore, simplification of the device is achieved.

Further, although the structure is excellent in contractibility, the structure is simple, and it is possible to realize miniaturization and cost reduction.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a quantitative sampling device for powder and granular material of the present invention.

FIG. 2 is a schematic cross-sectional explanatory view showing a state in which powder particles are accumulated in a concave groove in the peripheral surface of the powder particle conveying drum in one embodiment of the powder quantitative sampling device of the present invention. is there.

FIG. 3 is a part of a powder quantitative sampling device according to an embodiment of the present invention showing a state after the powder or granular material accumulated on the outer peripheral surface of the powder or granular material conveying drum has been scraped off; It is a cross-sectional schematic explanatory drawing.

FIG. 4 is a schematic explanatory view showing a powdery-particle conveying drum in an embodiment of the powdery-particles quantitative sampling device of the present invention.

FIG. 5 is a schematic explanatory view showing a specific example of the powdery or granular material sampling means in the powdery or granular material quantitative sampling device according to the present invention.

FIG. 6 is a specific example of the powdery-particles collecting means in the powdery-particles quantitatively collecting device according to the present invention, and is a schematic explanatory view of the powdery-particles collecting means of a method of collecting powders and granules with a cup. Is.

FIG. 7 is a specific example of the powder / granule collecting means in the powder / granular material quantitative sampling device according to the present invention, in which the powder / granular material is collected by a concave portion provided in the rod body. It is a schematic explanatory drawing of a collection means.

FIG. 8 is a specific example of the granular material sampling means in the granular material quantitative sampling device according to the present invention, and is an outline of the granular material sampling means of the type that collects the granular material with a diagonal tube. FIG.

FIG. 9 is a schematic explanatory view showing an example of a combination of a powder / granular material conveying means and a conveying amount regulating means in the powder / granular material quantitative sampling device of the present invention.

FIG. 12 is a partial cross-sectional schematic explanatory view of an example of a combination of the powdery-particles conveying means and the conveyance-amount regulating means in the powdery-particles quantitative sampling device of the present invention.

[Explanation of sign]

A ... space, B ... space, P ... process tube, R
... Rotary actuator, 2 ... Flange, 3 ... Outer case, 4 ... Flange, 6 ...
Slope, 7 ... Shielding plate, 8 ... Partition, 9 ... Bearing, 10 ... Screw feeder main body, 11 ...
Powder / granule sampling port, 12 ... Drop port, 13 ... Screw, 14 ... Powder / granular substance transporting drum, 15 ... Rotating shaft, 16 ... Scraped portion, 17 ... Scraped plate 1
8 ... suction pipe, 19 ... suction port, 20 ... concave groove, 21 ... air supply pipe, 22 ... exhaust pipe, 23 ...
Ejector, 24 ... Control valve, 25 ... Control valve

Claims (2)

[Claims] 1. A powder / granular material collecting means for collecting powder / granular material flowing in a process tube and dropping it outside the process tube; a conveying means for receiving the powder / granular material falling and conveying it. Conveying amount regulating means for regulating the conveying amount of the aggregate of the granular material conveyed by the conveying means, and taking out of the aggregate of the granular material conveyed after being regulated by the conveying amount regulating means A means for quantitatively collecting powdery or granular material, comprising: 2. The powdery or granular material collecting means according to claim 1,
Granules comprising a conveying means, a conveying amount regulating means, a granular material extracting means, and a granular material returning means for returning the granular material that cannot be received by the conveying means into the process tube. Body quantitative sampling device.