JPH0741151A - Dry powder feeder - Google Patents

Abstract

PURPOSE:To feed dry powder quantitatively and continuously, according to the property of this powder. CONSTITUTION:A hopper 32 is arranged on the side of one carrying in of a variable-speed belt conveyor 30 so as to accommodate dry powder being carried by a vibratory feeder 38 which can adjust the quantity of carried powder, according to the property of powder, and also a suction port 44 is arranged on the other discharge side. A dam to restrict the quantity of loaded and carried powder is provided on an endless belt 28 traveling continuously for carrying the powder accommodated in the hopper 32 through the opening on the discharge side of itself, and a suction part 44 is arranged, to be positioned within the width of a band body, right above the band body being formed in band shape out of the powder on the belt 28 by this dam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry powder feeder, and more particularly, when feeding a dry powder to a particle size distribution measuring instrument or the like,
The present invention relates to a device for continuously and quantitatively supplying powder in accordance with its properties.

[0002]

2. Description of the Related Art Conventionally, as a dry powder (sample) supplying device, a conveying feeder (hereinafter referred to as a vibration feeder) as shown in FIG. 3 has been used.

That is, the vibration feeder 10 is provided with a vibrator 16a for generating vibration and a trough 16b for loading dry powder (sample) on the base 14, and the vibrator 16a and the trough 16b are strongly connected to each other. The vibration generated by the shaker 16a is transmitted to the trough 16b. The vibrator 16a and the trough 16b are attached to a single mounting seat whose angle can be adjusted.
b can be appropriately set to a desired inclination angle.

Further, a hopper 18 for receiving a sample is arranged directly below the discharge port of the trough 16b in front of the base 14. Further, the vibration feeder 10 includes a compressor 20 and an air dryer 22 which are pneumatic pressure sources.
Are connected in series via supply pipes 15a and 15b.

A flexible supply pipe 24a for introducing a sample from the hopper 18 of the dry powder supply device 10 is detachably connected to the particle size distribution measuring device 12, and at the same time, a flexible supply pipe 24b for supplying dry air. Is communicatively connected to the vicinity of the tip connection port of another flexible supply pipe 24a.

With this structure, the trough 1
The sample put on the 6b is discharged from the discharge port of the trough 16b and collected in the hopper 18, while the compressed air supplied from the flexible supply pipe 24b causes the vacuum generator 2
5 and the negative pressure in the flexible supply pipe 24a, so that the sample in the hopper 18 is absorbed in the flexible supply pipe 24a, and the vacuum generator 2 passes through the flexible supply pipe 24a.
Guided within 5.

Due to the effect of the compressed air supplied to the vacuum generator 25 and the suction device 26 connected to the particle size distribution measuring device 12, the vacuum generator 25 and the sample cell 2
7, the air flow is formed in the order of the suction device 26.

The sample introduced into the vacuum generator 25 is collected by the suction device 26 through the sample cell 27 by the flow of the air. In this case, when the sample passes through the sample cell 27, Then, the particle size distribution measuring device 12 measures the particle size distribution.

[0009]

The dry powder supplying apparatus 10 as described above has the following problems.

That is, when measuring the particle size distribution,
The continuous and quantitative supply of the sample to the particle size distribution measuring instrument has been an important issue for measuring the particle size distribution with good reproducibility.

However, in the vibrating feeder that has been conventionally used when measuring the particle size distribution of dry powder, the sample moves while it remains in the aggregated state put on the trough, and the aggregated sample is shaped. Since it is not possible to do so, the sample supply is often interrupted or the sample supply amount fluctuates, and stable sample supply (quantitative and continuous sample supply) is difficult, resulting in a particle size distribution of the sample. There was a difficulty that reproducibility in measurement was not obtained.

Therefore, an object of the present invention is to provide a dry powder supply device capable of supplying the dry powder quantitatively and continuously according to the properties of the powder.

[0013]

In order to achieve the above object, the present invention is intended to accommodate a dry powder which is transported by a transport feeder whose transport amount can be adjusted according to the properties of the powder.
A hopper is provided on one carrying-in side of the belt conveying device and a suction port is provided on the other carrying-out side, the discharge side of the hopper is opened, and the powder contained in the hopper is continuously run on an endless belt. A weir that regulates the amount to be loaded and conveyed is provided, and the powder is formed by the suction port that is arranged so as to be located within the width of the strip just above the strip formed by the weir on the belt in a strip shape. It is characterized in that the body is inhaled and continuously and quantitatively supplied.

In this case, the transfer feeder is configured to transfer the powder by vibrating the trough, and the vibration strength applied to the trough and the inclination angle of the trough can be adjusted according to the property of the powder. .

Further, the belt conveying device is composed of a variable speed drive source capable of appropriately selecting the belt speed according to the property of the powder to be conveyed.

[0016]

In the present invention, the sample is quantitatively transferred by the vibration feeder whose vibration intensity and inclination angle can be adjusted according to the property of the sample, and the sample is disposed on one carrying-in side of the belt conveying device. The sample stored in the hopper is regulated by a weir formed on the belt traveling side of the hopper, and the amount of the sample loaded on the belt is regulated by the weir. By arranging a suction port just above the band formed of powder so as to be positioned within the width of the band, the sample on the belt is sucked from the suction port and continuously measured by the particle size distribution measuring instrument. And it can be supplied quantitatively.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the dry powder supply apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience of explanation, the same components as those of the conventional structure shown in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, FIG. 1A is a schematic explanatory view of a dry powder supply apparatus according to the present invention, FIG. 1B is an overall perspective view of the dry powder supply apparatus, and FIG. 1C is a dry powder supply apparatus. It is a top view of an apparatus.

In the figure, reference numeral 30 is an endless belt 2 which continuously travels at a variable speed by a drive source (not shown).
8 shows a transporting device provided with No. 8, and in this embodiment, an example using a belt conveyor will be described. This belt conveyor 3
A hopper 32 is mounted on one of the carry-in sides of 0.

As shown in FIG. 1 (b), the hopper 32 has inclined plates 34a, 34b facing each other on both sides in the longitudinal direction and a vertical partition plate 36 orthogonal to the belt running direction on the belt running side. Set up to form a box.

The inclined plates 34a and 34b have a small distance (8 mm to 10 mm in the present embodiment) between the opposing lower edge portions.
The belt 28 is separated from the upper surface of the belt 28, and a slight gap is formed on the upper surface of the belt 28. Further, the partition plate 36 forms an opening 35 (see FIG. 2) having a height A and a width B with respect to the upper surface of the belt.

The sample loaded on the trough 40 is transferred to the upper portion of the hopper 32 thus constructed by vibrating the trough 40 set at a predetermined inclination angle by a solenoid 42 which is a vibrator. Vibration feeder 3
8 are provided.

On the other hand, directly above the belt 28 on the other carrying-out side of the belt conveyor 30, a belt 2 is provided by a suction device (not shown).
Suction port 44 for sucking the sample loaded in a strip shape on 8
(Inner diameter b = about 4 mm) is provided [see (c) of FIG. 1], and on both sides of this suction port 44, the width is the same as the bottom gap of the inclined plates 34a and 34b facing the hopper 32, or this width B. A pair of side plates (gate plates) 46 that are slightly narrower apart from each other.
a and 46b are installed, and the suction port 4 is provided above the gate plate.
4 is set and supported at a predetermined height position with respect to the upper surface of the belt.

Next, the method of adjusting the dry powder supply device and its operation will be described in detail below with reference to the explanatory view shown in FIG. That is, FIG. 2A shows a state in which the trough 40 of the vibration feeder 38 is set on the base 50 so that the angle can be adjusted. The angle α can be set in a suitable state according to the particle size, the refractive index, etc.), and the height position of the belt conveyor 30 is also set appropriately by the knob 54 according to the discharge port height of the trough 40. be able to.

Further, as shown in FIG. 2 (b), when the angle of the trough 40 is set to β in accordance with another property of the sample, the height position of the belt conveyor 30 is the height difference H.
The state is set to the low position. Further, the vibration strength of the feeder 38 can be adjusted appropriately according to the demand to adjust the powder conveyance amount.

In this way, the sample is quantitatively transferred into the hopper 32 on the carry-in side of the belt conveyor 30 by the vibrating feeder 38 adjusted to an appropriate inclination angle according to the properties of the powder.

The sample accommodated in the hopper 32 is formed into a sample band on a continuously running belt by a weir 35 composed of an opening (A × B) of the hopper 32, and is finally supplied to a measuring instrument. When the required sample amount is determined, the sample conveyance amount per unit time is set by adjusting the belt speed of the belt conveyor 30 in accordance with the required sample amount, and a sample with a constant width is sampled from the sample strip through the suction port 44 having an inner diameter of 4 mm. By suctioning, a desired sample can be quantitatively supplied to the measuring instrument.

It should be noted that both inclined plates 3 of the trough 40 and the hopper 32 that come into direct contact with the sample of the vibrating feeder 38.
The surface of the partition plate 36 provided with 4a, 34b and the weir 35 is formed by buffing a stainless steel material, and is finished in a so-called non-classified smooth state in which the sample does not remain on the surface.

It is desirable that the environmental conditions around the device used are such that the humidity is within 0 to 60%. The present invention has been described above with reference to a preferred embodiment, but the present invention is not limited to the above embodiment, and many improvements and modifications can be made without departing from the spirit thereof.

[0030]

As described above, in the dry powder supply device according to the present invention, the powder supplied from the transfer feeder configured so that the transfer amount of the dry powder can be adjusted according to the property of the powder is a belt. Amount of the powder contained in a hopper provided on one side of the transport device, and the powder contained in the hopper is loaded and transported on an endless belt that continuously travels through a weir formed on the belt traveling side of the hopper. The suction port is located just above the band formed of powder on the belt by the weir so as to be positioned within the width of the band, and the speed of the belt and the vibration strength of the vibration feeder can be controlled. By adjusting the amount, it is possible to freely adjust the supply amount according to the properties of the dry powder, to eliminate the interruption, fluctuation and classification of the supply amount, and to supply the dry powder continuously and quantitatively. It has excellent effects such as

[Brief description of drawings]

FIG. 1A is a schematic explanatory view of a dry powder supply device according to the present invention, FIG. 1B is an overall perspective view of the dry powder supply device, and FIG. 1C is a dry powder supply device. FIG.

FIG. 2 is an explanatory view showing a state in which the inclination angle of the vibrating feeder is set according to the property of the powder, FIG. 2 (a) is an explanatory view showing a state in which the inclination angle of the trough is set to α, and FIG. )
FIG. 7 is an explanatory view showing a state where the inclination angle of the trough is set to β.

FIG. 3 is an overall schematic diagram of a conventional dry powder supply device.

[Explanation of symbols]

 10 Dry Powder Supply Device 12 Particle Size Distribution Measuring Device 14 Base 15a, 15b Supply Pipes 16, 38 Vibration Feeder 18 Hopper 25 Vacuum Generator 27 Sample Cell 28 Endless Belt 30 Belt Conveyor 32 Hopper 34a, 34b Inclined Plate 35 Weir 36 Partition Plate 40 Trough 44 Suction port 46a, 46b Side plate 50 Base 52, 54 Knob

Claims (3)

[Claims] 1. A supply device for supplying a fixed amount of dry powder, wherein one side of a belt carrying device is provided to accommodate the dry powder carried by a carrying feeder capable of adjusting the carrying amount according to the property of the powder. A hopper is arranged on the other side and a suction port is arranged on the other carry-out side, the discharge side of the hopper is opened, and the amount of powder contained in the hopper is loaded and conveyed on an endless belt that continuously travels is regulated. A weir is provided, and the powder is sucked continuously and continuously by the suction port arranged so as to be positioned within the width of the strip just above the strip formed by the weir on the belt in a strip shape. A dry powder supply device characterized by being configured to supply it quantitatively. 2. The transport feeder is configured to transport a powder by vibrating a trough, and is configured to be able to adjust a vibration strength given to the trough and a tilt angle of the trough according to a property of the powder. The dry powder feeder according to claim 1. 3. The dry powder supply device according to claim 1, wherein the belt transfer device is constituted by a variable speed drive source capable of appropriately selecting a belt speed according to the property of the powder to be transferred.