JP2003231587A - Discharging method for fluid substance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for discharging a powder granular substance with which a small amount of the powder granular substance can be discharged even after a discharging port of a hopper is a closed by a valve. <P>SOLUTION: The method for discharging a fluid substance comprises steps of opening/closing the discharging port 2 by the valve 3 which can vertically rise/lower in the hopper 1 having the discharging port 2 in a lower conic portion and capable of storing the powder granular substance and opening the discharging port 2 to allow the substance to be fed. The valve 3 is lowered step by step from a full open state until a specified value is reached within a range of set values to measure and control a discharged amount. After the valve 3 closes the discharging port 2, the small amount of the powder granular substance is discharged from an annular gap S formed between a hermetic member 13 and the port 2 by an eccentricity of the valve 3 due to vibration until the set value is reached. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for discharging a fluid substance such as a powdery substance or a granular substance.

[0002]

2. Description of the Related Art In a wide range of industrial fields such as pharmaceuticals, foods and chemicals, many kinds of fluid substances such as powdery substances and granular substances are used as raw materials for commercialization. These flowable substances such as powdery substances or granular substances (hereinafter simply referred to as “fluid substances”) are stored in different hoppers for different types of content components and stored in different hoppers. Each hopper is moved to a predetermined position to mix the fluid substance, and a required amount of the fluid substance is discharged and supplied to another container.

As a method for discharging such a fluid substance, for example, Japanese Patent Application No. 9-279332 (Japanese Patent Application Laid-Open No. 11-27932)
No. 100091).
The hopper 1 containing the fluid substance 2 used in this discharging method has a cone type valve 4 therein, and this valve 4 is a discharge port formed on the bottom surface of the hopper 1 (the center of the lower cone portion). 3 can be opened and closed. In the normal state, the valve 4 is at the lowest point position and closes the discharge port 3 tightly.

A long rod 5 is vertically connected to the valve 4, and the upper end of the rod 5 penetrates the hopper 1 and projects upward. Then, by vertically moving the rod 5 up and down by the lifting device 7 installed above the hopper 1, the valve 4 can change its vertical relative positional relationship with respect to the discharge port 3.
The liquid substance 2 can be discharged and supplied to another container by raising the temperature and opening the discharge port 3. After discharging a necessary amount, the valve 4 can be lowered to close the discharge port 3.

Since the valve 4 is vibrated by the vibration generator 18 attached to the lifting device 7,
The particulate matter is discharged without causing the bridge phenomenon,
When the input amount approaches the set value, the valve 4 is lowered to narrow the discharge flow path space between the valve 4 and the discharge port 3 to adjust and control the discharge amount. Then, when the input amount reaches the set value, the valve 4 closes the outlet 3.

[0006]

In the prior art as described above, an O-ring is fitted on the inner peripheral surface of the discharge port 3, and the valve 4 is pressed against the inner peripheral surface of the O-ring to discharge the discharge port. 3 is closed tightly. Valve 4 to this O
When fitted into the ring, the outer peripheral surface of the valve 4 and the inner peripheral surface of the O-ring are in line contact with each other and are intimately joined to each other. There was no gap between them, and it was not possible to perform fine adjustment discharge of the particulate matter. Therefore, even if the discharge amount is finely adjusted while lowering the valve 4, the discharge cannot be performed after the valve 4 closes the discharge port 3 tightly, and the input amount is ± 5% of the predetermined weight set value. There was a front-back error.

The present invention has been set in view of the error in the input amount that occurs in the above-described conventional method for discharging a fluid substance, and enables the discharge of a minute amount of the particulate matter even after the valve is fitted into the discharge port. It is an object of the present invention to provide a method of discharging a powdery or granular material that can secure the input amount.

[0008]

In order to achieve the above-mentioned object, a method for discharging a fluid substance according to the present invention has a discharge port in a lower conical portion, and a vertical direction is provided in a hopper capable of accommodating a granular material. In the method of discharging a fluid substance in which the discharge port is opened and closed by a valve that can be moved up and down and the particulate substance can be supplied by opening the discharge port, the valve 3 is set every time the set value reaches the specified value from the fully open state. Is gradually lowered to measure and adjust the discharge amount, and after the valve 3 seals the discharge port 2, an annular gap formed between the sealing member 13 and the discharge port 2 due to eccentricity of the valve 3 due to vibration. A small amount of powdery particulate matter is discharged from S until the set value is reached. The valve 3 is adapted to give vibration while discharging the particulate matter from the fully opened state, or to give vibration after a certain specified value after discharging the particulate matter from the fully opened state.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of a discharging device used in the discharging method of the present invention. In FIG. 1, reference numeral 1 is a hopper 1 capable of containing a fluid substance A such as a powdery substance or a granular substance. A discharge port 2 is formed at the center of the lower conical portion of the hopper 1 that can be erected. And in this hopper 1, the cone type valve 3
Is accommodated vertically movable in the vertical direction, and the valve 3 can open and close the discharge port 2.

A rod 4 is vertically connected to the upper portion of the valve 3. The upper end of this rod 4 projects upward from the hopper 1 and is connected to the upper end of the flange (large diameter head).
5 is placed on the cylindrical spacer 6 fixed to the upper part of the hopper 1 to determine the lowest point position of the valve 3, and the valve 3 normally keeps the discharge port 2 closed. There is.

Further, in FIG. 1, reference numeral 7 is a lifting member 8.
And an elevating device having an elevating mechanism 9 and a vibration generator 10. The elevating device 7 has the same structure as the elevating device used in the above-described conventional disclosed technique.

The overall structure as described above is basically the same as that of the above-mentioned conventional disclosed technique, but in the present invention, the inner peripheral surface from the hopper 1 to the discharge port 2 is formed into a smooth surface. At the same time, the valve 3 is characterized in that the discharge port 2 is closed tightly in the normal state via the sealing member, and that the powdery particulate matter A can be discharged little by little by vibrating the valve 3. ing.

Therefore, as shown in FIG. 2, the hopper 1
An annular discharge member 12 is integrally fixed to a discharge hole 11 at the center of the conical portion to form a discharge port 2. In particular, the lower end of the hopper 1 and the upper end of the discharge member 12 are butted against each other so as not to cause a step difference, and fixed by welding, so that the inner peripheral surface from the hopper 1 to the discharge member 12 is finished to be a smooth surface. .

In addition, an annular sealing member 13 made of a material such as silicon rubber having a suitable expansion and contraction elasticity is fitted in an annular recess formed on the outer peripheral surface of the lower end of the valve 3. The sealing member 13 is capable of expanding and contracting inward and outward from the circumference, and normally bulges outward and its outer diameter is
It is larger than the outer diameter of the lower end of the valve 3. Therefore, the valve 3 is lowered and the discharge port 2, that is, the discharge member 12
When it enters the inside, the sealing member 13 shrinks in diameter and the discharge member 12
It will fit tightly inside.

FIG. 3 shows an example in which the sealing member 13 is attached to the outer peripheral surface of the lower portion of the valve 2. The sealing member 13 is a valve 3 and a disc-like member which can be fixed to the lower surface of the valve 3. It is clamped and fixed between the clamp member 14 and the clamp member 14.

For this reason, the lower part of the rod 4 has a smaller diameter than the upper part and penetrates the inside of the valve 3, and the screw portion 15 formed at the lower end of the rod 4 penetrates the holding member 14 and projects downward. There is. Then, the nut 17 is fastened to the screw portion 15 from above and below via the spacer 16 inserted into the holding member 14 from below, so that the holding member 14 can be attached to the valve 3
Fixed to the underside of.

An annular mounting recess 18 may be formed on the outer peripheral surface of the joint between the valve 3 and the sandwiching member 14, and the sealing member 13 may be fitted in the recess 18 for mounting. The valve 3 is fixed between the large diameter portion of the rod 4 and the holding member 14.

The discharging device used in the method of the present invention has the above-mentioned structure. Next, a method for discharging the particulate material A in the hopper 1 will be described. A hopper 1 containing a granular material A having a necessary content component is selected from a group of hoppers 1 stored in a place such as a warehouse, and the hopper 1 is erected at a position below an elevating device 7 and placed there. Below the hopper 1, a measuring container 19 into which the granular material A is to be charged is installed, and this measuring container 19 is placed on a measuring device 20.

As in the conventional case, the elevating mechanism 9 lowers the elevating member 8, and the electromagnet 21 provided on the lower portion of the elevating member 8 is attracted to the flange 5 at the upper end of the rod 4. Next, if the elevating member 8 is raised, the rod 4 is also raised.
Is pulled up from the inside of the discharge port 2 to open the discharge port 2, and the particulate matter A can be discharged. At this time, the vibration generator 1
Since the lifting member 8 vibrates due to 0, this vibration is transmitted from the electromagnet 21 to the rod 4 through the flange 5.
The valve 3 vibrates. Then, the outflow of the granular material A is promoted without causing the bridge phenomenon.

Initially, the discharge port 2 is fully opened, and a predetermined amount of the particulate material A is charged into the weighing container 19. When the input amount in the middle of discharging, that is, the measured value by the measuring device 20 reaches a predetermined value (specified value), the valve 3 is lowered to narrow the discharge space of the discharge port 2. As described above, since the lower part of the hopper 1 has a conical shape, the circular discharge space (discharging area) formed between the hopper 1 and the valve 3 can be changed depending on the vertical positional relationship of the circular valve 3. You can

At the next stage, the valve 3 is further lowered when the input amount reaches the specified value. In this way, the height position of the valve 3 is lowered step by step for each specified value to narrow the discharge space and control the input amount. When the input amount is close to the set value, the valve 3 is put into the discharge port 2, and thereafter, the predetermined amount is reached by the small amount discharge by vibration.

Finally, the set value is 100K in the weighing container 19.
In the case of charging g of the granular material A, the specified charging value in the initial fully opened state is set to 80 kg, and the measuring device 20 sets the charging amount to 80
When Kg is measured, the valve 3 is lowered. Next, when the prescribed charging value reaches 90 kg, the valve 3 is lowered. In this way, for example, the specified input value is 90 → 95 → 9 from 80 kg.
Every time 7 → 99 kg, the height position of the valve 3 is changed stepwise to control the input amount. When the specified value reaches 99%,
The valve 3 is fitted into the discharge port 2 and vibration is continued.

As described above, the sealing member 13 is fitted on the outer peripheral surface of the valve 3, and the sealing member 13 is in contact with the inner surface of the discharge port 2. Further, since the sealing member 13 has elastic elasticity in the circumferential direction, the valve 3 is vibrated in the horizontal direction, for example, as shown in FIG. When eccentric from the center, the sealing member 13 in the direction in which the valve 3 is offset is crushed between the inner surface of the discharge port 2 and the sealing member 13 on the opposite side in the same direction (leftward direction) due to the eccentricity of the valve 3. When it is pulled inward, it deforms into an elliptical shape, and a circumferential gap S is instantaneously formed between the sealing member 13 and the discharge port 2, that is, the discharge member 12.

Since the powdery granular material A is also vibrated through the valve 3, the powdery granular material A flows out from this gap S and is put into the weighing container 19. The gap S is irregularly formed in the circumferential direction due to the vibration of the valve 3, but the amount of injection from this gap S is very small, and the measuring instrument 20 measures a very small injection value and sets the injection. Value (1
When 00 kg) is measured, the vibration generator 10 is stopped by sending a signal for stopping the vibration. When the vibration of the valve 3 is stopped, the center of the valve 3 coincides with the center of the discharge port 2, and the sealing member 13
Swells in the circumferential direction, so that the discharge port 2 is completely closed, and thereafter, the granular material A does not flow out.

Since the lifting device 7 and the weighing device 21 are managed by the computer 22, the operation of the lifting device 7 is started, the specified values and final set values are measured during the loading, the vibration of the vibration generator 10 is stopped, and the lifting and lowering is performed. The stoppage of the operation of the device 7 can be automatically managed. When the discharge of the particulate material A is completed, the excitation of the electromagnet 21 and the flange 5 is cut off, the elevating member 7 is raised to the original position, and the hopper 1 is transferred to the original position.

Therefore, the measuring device 20 measures the specified value during the charging, and the result is sent a signal to the elevating mechanism 9 via the computer 22, and the elevating mechanism 9 causes the elevating member 8 to lower the valve 3. The stepwise descending height position of the valve 3 may be input to the computer 22 by calculating the discharge area based on the relative positional relationship between the discharge port 2 and the valve 3, and the lifting mechanism 9 may be controlled. .

The particulate material A discharged by the above operation
The property of can be applied to both a substance having good fluidity or a substance having poor fluidity. However, in the case of a substance having good fluidity, it is not necessary to apply vibration from the beginning, and the valve 3 may vibrate when it descends after a certain specified value. However, the position is determined by the properties of the powdery or granular material.

[0028]

According to the discharge method of the present invention described above, when the valve 3 is raised to open the discharge port 2 and the powdery granular material A is charged into the weighing container 19, the valve 3 is fully opened in advance. When the required amount (specified value) of the stopped set value is measured, the position of the valve 3 is lowered, and when the next specified value is measured, the valve 3 is further lowered. When the specified value is reached, the valve 3 is lowered. Since it did in this way, the granular material A can be stepwise input to the measuring container 19 by changing the input amount.

Finally, when the valve 3 is fitted into the discharge port 3 when the value reaches a predetermined value as a prescribed value and vibration is continued, the expansion and contraction elasticity fitted on the outer periphery of the valve 3 is obtained. Due to the eccentricity of the valve 3, the sealing member 13 has a circumferential gap S formed between it and the discharge port 2, and a small amount of the particulate material A is introduced through this gap S,
It becomes possible to finish the supply with the set value of 100%.
In particular, in the present invention, since the inner surface is finished to be smooth from the hopper 1 to the discharge port 2, the powdery granular material A is slippery and does not hinder discharge and charging.

[Brief description of drawings]

FIG. 1 is an overall front view showing an embodiment of an apparatus used in the discharging method of the present invention.

FIG. 2 is an enlarged sectional view showing a discharge port and a valve at a lower portion of a hopper.

FIG. 3 is an enlarged sectional view showing an example of a state where a sealing member is attached to the outer peripheral surface of the lower end of the valve.

FIG. 4 is a plan view showing a state in which a valve is eccentric with respect to a discharge port.

[Explanation of symbols]

1 Storage hopper for powder and granular materials 2 Liquid material discharge port 3 cone type valve 4 rod 5 flange 6 spacers 7 Lifting device 8 Lifting member 9 Lifting mechanism 10 Vibration generator 11 discharge hole 12 Discharge member 13 Sealing member 14 Clamping member 15 screw 16 spacer 17 nuts 18 Mounting recess 19 weighing container 20 scales 21 Electromagnet 22 Computer

Continued front page    (72) Inventor Kunihide Ikeuchi             Tsukishima Machine, 2-17-15 Tsukuda, Chuo-ku, Tokyo             Within the corporation F term (reference) 3E055 AA03 BB01 CA01 CB04 DA03                       DA10 EA01 EA07 EB05 EB09                       FA10                 3E070 AA19 AB11 GA11 HA06 HB04                       HD02 HE03 HF02 WF05 WG07                 3F075 AA08 BA01 BB01 CA09 CB01                       CB12 CB13 CB15 CD09 DA11                 4F201 AC01 AJ05 AR15 BA06 BC01                       BC12 BC19 BQ02 BQ15 BQ35                       BQ48 BQ54 BQ57

Claims (3)

[Claims] 1. A discharge port is opened and closed by a valve that has a discharge port in the lower cone and can be vertically moved up and down in a hopper that can store powdered and granular substances, and the powder and granular substances are supplied by opening the discharge port. In the possible discharge method of the fluid substance, the discharge amount is measured by gradually lowering the valve 3 every time when the specified value is reached from the fully opened state within the set value range,
After adjusting and sealing the outlet 2 by the valve 3, a small amount of powdery or granular material is reached from the annular gap S formed between the sealing member 13 and the outlet 2 due to the eccentricity of the valve 3 due to vibration until the set value is reached. A method for discharging powdery particulate matter, characterized in that 2. The method of discharging a granular material according to claim 1, wherein the valve 3 is adapted to vibrate while discharging the granular material from the fully opened state. 3. The method of discharging a powdery or granular material according to claim 1, wherein the valve 3 is adapted to vibrate after discharging the powdery or granular material from a fully opened state after a certain specified value.