JPS61111227A - Feeder for granular powder - Google Patents

Abstract

PURPOSE:To enable continuous operation of an apparatus by piercing a valve element having four valve element portions in the free state through a fixed supply path, an upper flexible chamber, a connecting pipe, a lower flexible chamber and a fixed outlet path. CONSTITUTION:A valve element 13 for opening and closing gates 1a, 2a, 3a, 4a is disposed in such a manner as to pierce through a fixed supply path 7, an upper flexible chamber 9, a connecting pipe 11, a lower flexible chamber 10 and a fixed outlet path 8. Respective valve elements 1b, 2b, 3b, 4b are connected to a rod 24 and subjected to fluid pressure from a pressurized fluid path 6 to be urged upward. When the connecting pipe 11 continues to move down, a valve element 13 is pushed downward, the upper flexible chamber 10 is expanded, and the lower flexible chamber 10 is contracted, so that the granular powder in a path 7 drops to be supplied to a fixed quantity chamber 9. Accordingly, the chamber 10 is connected to the path 8 and becomes high pressure. Subsequently, when the connecting pipe 11 moved up, the granular powder in the chamber 9 drops to be supplied to the chamber 10. Secondly when the connecting pipe 11 moved down, the granular powder in the path 7 is supplied to the chamber 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention was developed for supplying folded edges of a blast machine to a blast passage through which pressurized air flows. However, its field of application is not limited to plastic machines, but can be extended to powder supply devices in general.

(Prior art and its problems) FIG. 6 shows an example of a conventional plastic machine. This plast machine introduces pressurized air generated by a compressor 1 to an abrasive material conveying pipe and a presto tank C, and is supplied from an abrasive material supply port d of the plast tank C to a mixing part e of the abrasive material transport pipe. The abrasive material is mixed with the pressurized air 1ζ and is injected from the plasto nozzle f at the tip of the abrasive material conveying pipe. In addition, the gate i between the plast tank C and the supply shoe (h) that replenishes the abrasive material to the plast tank C is a shutoff valve g.
) is closed. In order to open the gate i and replenish the abrasive material, the device must be stopped and exhausted.
Therefore, it is necessary to reduce the pressure inside the plast tank C.

However, the above conventional example has the following problems.

(2) Since the plast tank C must be formed to have a pressure-resistant structure, it is expensive and poses a safety problem.

If the plast tank C is configured to be open to the atmosphere, pressurized air will blow up from the abrasive material supply port d, making it impossible to supply the abrasive material.

■ In order to replenish the abrasive material into the plast tank C, the device must be temporarily stopped and vented, so the device cannot be continuously operated.

(Objective of the Invention) An object of the present invention is to provide a powder supply device that can solve the above-mentioned problems.

(Structure of the Invention) In order to achieve the above object, the present invention is arranged between the powder supply tank 5 and the pressurized fluid passage 6 located below the powder supply tank 5. In the powder/granular material supply device that guides the powder/granular material to the pressurized fluid passage 6, a first gate 1a is formed above the fixed supply passage 7 of the powder/granular material supply tank 5, and a second gate 2a is formed below the powder/granular material supply tank 5. A fourth gage) 4g is formed in the fixed outlet passage 8 connected to the pressure fluid passage 6, while an upper flexible chamber 9 is provided which communicates with the fixed supply passage 7#ζ via the second gage) 2a. ) 4a, a lower flexible chamber 10 is provided which communicates with the fixed outlet passage 8, and the upper flexible chamber 9 and the lower flexible chamber 1 are connected to each other.
0 through a connecting pipe 11, a third gate 3g is formed below this connecting pipe 11, and a lifting means 12 for moving the connecting pipe 11 up and down is provided. At the position, the first gate 1a is opened, the second gate 2a is closed, the third gate 3a is opened, and the fourth gate 4a is closed. 2 gate 2g, 3rd gate 33 and 4th gate 4
a, in the downward position of the connecting pipe 11, the first gate 1at-closes, the second gate) 2a''t-fJI opens, the third gate) 3a closes, and the fourth gate) 4a opens, the first valve body part 1
b, second valve body part 2b, third valve body part 3b, and fourth valve body part 4
b'5! : A trap is arranged so that the provided valve body 13 in a free state passes through the fixed supply passage 7, the upper flexible chamber 9, the connecting pipe 11, the downtown flexible chamber 10, and the fixed outlet passage 8. .

The embodiments shown in FIGS. 1 to 5 are examples in which the present invention is implemented in a plastic machine.

As shown in Fig. 2, this plast machine transfers pressurized air generated by a compressor 14 to an abrasive material conveying pipe (pressure branch passage).
6, the abrasive material (powder material) supplied from the abrasive material supply tank (powder material supply tank) 5 via the apparatus A of the present invention is mixed with the pressurized air, and the abrasive material conveying pipe is It is injected from the plasto nozzle 15 at the tip of the nozzle 6. 16 is a drain separator.

The abrasive material supply tank 5 of the present embodiment has a non-pressure-resistant structure that is open to the atmosphere, and there is no need to introduce the pressurized air from the compressor 14 into the abrasive material supply tank 5. , is significantly different from the conventional example shown in FIG.

In this embodiment, relatively high-pressure pressurized air is supplied to the abrasive material conveying pipe 6 by the compressor 14, but relatively low-pressure pressurized air is used for cleaning using an air supply device such as a blower or fan. It can be configured such that the material is supplied to the material conveying pipe 6.

As shown in FIG. This is for guiding the powder (abrasive material) in the powder supply tank 5 to the pressurized fluid passage 6.

The supply pipe part of the powder supply tank 5 is a fixed supply passage 7, with a first gate 1a on the upper side and a second gate on the lower side.
2a are formed respectively.

On the other hand, the powder supply port 17)ζ of the pressurized fluid passage 6 is connected to the fixed outlet passage 8, and a fourth gate 4a is formed above it. The fixed supply passage 7 is connected to an upper flexible chamber 9 made of flat spherical rubber located below it. This upper flexible chamber 9 communicates with the fixed supply passage 7 via the second gate 2a. Further, the fixed outlet passage 8 is connected to a lower flexible chamber 10 made of flat spherical rubber located above it. This lower flexible chamber 10 communicates with the fixed outlet passage 8 via the fourth gate 4a. The distance between the lower end of the upper flexible chamber 9 and the lower flexible chamber 101 is 1°4 m [IF 1]
-c**gh・1°゛t: communicates via m a pipe section 1. A third gate 3a is formed on the lower side of this connecting pipe 11.

The connecting pipe 11 is reciprocated up and down by a predetermined stroke by the elevating means 12, thereby causing the upper flexible chamber 9 and the lower flexible chamber 10 to extend and contract as shown in FIG.

The elevating means ``12'' of this embodiment is shown in FIGS. 1, 3 and 4.
As shown in the figure, the elevator plate 18 to which the connecting tube 11 is connected is configured to be moved up and down and back and forth by an eccentric shaft means 19). 20 is a drive motor, 21 is a transmission gear pair,
22 is a transmission chain mechanism, and 23 is a guide rod. It goes without saying that various means can be employed for this elevating means 12.

The fixed supply passage wr7, the upper flexible chamber 9, the connecting pipe 11, the lower flexible chamber 10 and the fixed outlet passage 8) ζ pass through these,
Each of the above games) 1a, 2a.

3a14a't - A valve body 13 that opens and closes is arranged.

This valve body 13 is located above the first gate 1a.
The second valve body part 1b is located on the F side of the second valve body part 1b, the second valve body part 2b is located on the F side of the second valve body part 2a, and the
The valve body part 3b and the fourth valve body part 4b located below the fourth gate 4a are connected by a connecting arad 24, and are urged upward in response to fluid pressure from the pressurized fluid passage 6. ing.

FIG. 5 shows the vertical movement of the connecting pipe 11 and the corresponding movement of the valve body 13 divided into strokes ① to ②.

■The stroke indicates the device operation start state, and at this time the connecting pipe 11
is in the upward movement position U. The valve body 13 receives fluid pressure from the pressurized fluid passage 6 and is urged upward, so that the first gate 1a opens, the second gate 2a closes, the third gate 3a opens, and the fourth gate 4a closes. ing. Kamimachi - room 9 is shrunk, lower flexible room l
O is growing. The fixed IAI channel 3 has a high pressure H1 and the upper and lower flexible chambers 9 and 10 are both at a low pressure. Although the powder in the powder supply tank 5 is in the fixed supply passage 7, it is prevented from falling into the upper flexible chamber io by the second valve body portion 2b.

In the stroke (2) in which the connecting pipe 11 moves downward and reaches the intermediate position C, the third gage 3a contacts the third valve body portion 3b and is closed. The valve body 13 is in the same position as in the stroke (2), the first gate 1a is kept open with the opening member 171A, and the second gate 28 and the fourth gate 4a are kept closed.

In the stroke (2) where the connecting pipe 11 further moves downward and reaches the downward movement position JD, the third valve body portion 3b and the valve body 13 are connected to the connection vx.
is pushed down to the lower position by t, and at the same time the upper bowl 9
expands, and the downtown area 10 contracts. The first gate 1a is closed, while the second gate 21 and the fourth gate 4a are opened. The third gate 3m maintains a closed state. As a result, the powder in the fixed supply passage 7 is quantitatively dropped and supplied to the flexible chamber 9. And the first game) 1 m is closed, the first
The valve body portion 1b is connected to a supply passage 7 in which the powder and granules in the powder and granule supply tank 5 are fixed.
k: Acts as a stopper to prevent falling more than a certain amount. Further, the lower flexible chamber 10 is in communication with the fixed outlet passage 8 and is at high pressure H.

Next, in the stroke (2) in which the connecting pipe 11 moves upward and reaches the intermediate position 1c, the relationship between the valve body 13 and each gate is the same as in the stroke (2). At this time, the fourth game 4a is closed, so the lower flexible chamber 10 becomes a closed space.

The connecting pipe 11 moves up further and returns to the upward movement position U#ζ■
In the stroke tζ, the relationship between the valve body 13 and each gate is the same as in the stroke (2). At this time, the third gate 3a is opened, so that the powder in the upper flexible chamber 9 is supplied falling into the lower flexible chamber 10. Further, the upper flexible chamber 9 and the lower flexible chamber 10 are in communication, and the pressure thereof is a pressure M between the high pressure H and the low pressure.
becomes.

Next, in the stroke (2) in which the connecting pipe 11 moves downward to the intermediate position C, the relationship between the valve body 13 and each gate is the same as in the strokes (1) and (2). At this time, the third gate 3m is closed.

In the stroke (2) in which the connecting pipe 11 further moves down to the downward movement position, the relationship between the valve body 13 and each gate is the same as in the stroke (2). At this time, the fourth gate 4a opens, so the powder grains 14°84.8□, 1 ka in the lower flexible chamber 10. 1□Ka6
1t=drop fed. The high pressure H in the pressurized fluid passage 6 reaches as far as the lower flexible chamber 1OK, but since the third gate 3a is closed, it is blocked there. On the other hand, by opening the second gate 2a, the powder and granules in the fixed supply passage 7 are supplied in a quantitative manner by falling, similar to the process (2). At this time, fluid (actually air) at intermediate pressure M escapes through the second gate 2a to the powder supply tank 5 via the fixed supply passage 7 (indicated by arrow P), but the pressure is small. The flow K can have a favorable effect of stirring the powder and granular material in the powder and granular material supply tank 5, since there is no problem with the falling supply of the powder and granular material. The pressure in the upper flexible chamber 9 is low.

Next, the connecting pipe 11 moves upward and reaches the intermediate position C in the ■ stroke, which is exactly the same as the ■ stroke.

Thereafter, the steps ①, ②, ②, ③ are repeated, and a fixed amount of powder and granular material is supplied to the device A of the present invention, and the same amount of powder and granular material is supplied to the device A of the present invention.
A will be supplied to the pressurized fluid passage 6. The period (C) of the vertical and reciprocating movement of the connecting pipe 11 allows the amount of powder and granular material supplied to the pressurized fluid passage 6 to be adjusted as desired.

Moreover, when the operation of the device is stopped, the valve body 13 moves to the downward position due to its own weight, and the first valve body part 1b moves to the first gate)latlj:
As a result, the powder and granules in the powder supply tank 5 are prevented from falling and flowing out.

In addition to the embodiments described above, the present invention can be configured in various ways (ζ).For example, the upper flexible chamber 9 and the lower flexible chamber 10 can be configured with an integrally molded rubber bag. In addition, the downtown bending room 10 may have a multi-stage structure, and accordingly, the third gate 3a, the third valve body part 3b, and the connecting pipe 11 can be arranged in a double-layered structure.Furthermore, the connecting pipe 11 can be Of course, the embodiments are not limited to those shown in the above embodiments as long as they perform the above operations.

Furthermore, the present invention has application fields other than plastic machines, such as powders such as wheat flour and cement, and grains.

It can also be used in other powder supply devices such as pneumatic conveying devices for particles such as grains, grids, and pellets.

(Effects of the Invention) Since the present invention has the above configuration, the following effects can be achieved.

(2) The device of the present invention can prevent the adverse effects of the pressure of the pressurized fluid passage from reaching the powder supply tank when supplying the powder or granule from the powder supply tank to the pressurized fluid passage. As a result, there is no need for the powder supply tank to have a pressure-resistant structure, which is advantageous in terms of cost and safety.

■ According to the device of the present invention, continuous operation is possible.

■ The device of the present invention has a simple structure. Furthermore, since there are no sliding parts where the powder passes, durability can be improved. Furthermore, when the connecting tube moves up, the pressure from the pressurized fluid passage helps the upward movement, and there is almost no power consumption at that time, so power only needs to be consumed to move the connecting tube down, resulting in lower running costs. becomes lower.

[Brief explanation of the drawing]

Fig. 1 is a vertical W1 view of an embodiment of the present invention, Fig. 2 is a schematic diagram of an example in which the present invention is implemented in a plastic machine, Fig. 3 is a plan view of an example of the elevating means, and Fig. 4 is the same. Enlarged side view of main parts,
FIG. 5 is a schematic sectional view explaining the present invention in detail, and FIG. 6 is a schematic diagram of a conventional example. 1a-11 1st gate 2a-11 2nd gate)
3 a---3rd game-
G 4 a --- 4th gate
1b--first valve body part 2b---second valve body part 3b
-m-Third valve body part 4b-m-Fourth valve body part 5--
- Powder supply tank 6 - Pressurized fluid passage 7 - Fixed supply passage 8 - m - Fixed outlet passage 9 - 11 upper flexible chamber 10 - 11 lower flexible chamber 11 - m - connecting pipe 1
2--Elevating means 13-m-Valve body

Claims (1)

[Claims] (1) In a powder supply device that is arranged between a powder supply tank and a pressurized fluid passage located below the supply tank and which guides powder and granule in the powder supply tank to the pressurized fluid passage, A first gate is formed above and a second gate is formed below the fixed supply passage of the granule supply tank, and a fourth gate is formed in the fixed outlet passage connected to the pressurized fluid passage.
an upper flexible chamber forming a gate and communicating with the fixed supply passage through a second gate, and a lower flexible chamber communicating with the fixed outlet passage through a fourth gate; and the lower flexible chamber are connected by a connecting pipe, a third gate is formed on the lower side of the connecting pipe, and an elevating means for moving the connecting pipe up and down is provided, while in the upward movement position of the connecting pipe, Open the first gate, close the second gate, open the third gate, close the fourth gate, and at the intermediate position of the connecting pipe,
Open the first gate, close the second, third, and fourth gates, and when the connecting tube is in the downward position, close the first gate, open the second gate, close the third gate, and close the fourth gate. The fixed supply passage, the upper flexible chamber, the connecting pipe, and the lower A supply device for powder and granular material, characterized in that it is disposed so as to pass through a flexible chamber and a fixed outlet passage.