JPH0346391B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flow rate adjustment device that adjusts the flow rate of powder and granular material flowing down from an upper structure.

[Conventional technology]

Conventionally, as this type of flow rate adjustment device, one that applies the throttle mechanism of a shutter has been known (Japanese Patent Publication No. 52-21268). Since the shutter operates in a direction perpendicular to the powder and granules flowing down, there is considerable resistance during operation, and b) It is troublesome to operate because it does not have a mechanism to automatically control the shutter operation. , there is a problem.

[Problem to be solved by the invention]

Regarding a of the above problems,
As shown in No. 42978, this problem can be solved by suspending a door divided into a plurality of pieces around the periphery of the opening so as to surround the opening and swinging the door upward and inward. However, the following new problems are pointed out in this conventional technique.

c The single pieces of the door are divided into two sets that are assembled in a staggered manner, and the single piece belonging to the outer set is located with its both sides outside the side of the adjacent single piece (which belongs to the inner set). Therefore, all the single pieces cannot be swung unless there are the same number of drive mechanisms as the single pieces belonging to this outer group. However, since all the single pieces always swing simultaneously, it is inefficient to require multiple drive mechanisms. In addition, since the installation location of each drive mechanism is specified according to the single piece belonging to the outer group, the drive mechanism cannot be installed at an arbitrary position, and furthermore, since multiple drive mechanisms are equally distributed, the piping distance is long.

d each single piece of the door is shaped into a substantially triangular shape;
When opening, gaps are created between adjacent single pieces, so there is a risk that some of the falling powder may leak from these gaps or that dust may widely spread outside.

Regarding b of the above problems,
- As shown in No. 174487, it is conceivable to control the arithmetic unit at one time, but this conventional device technology controls the opening and closing of the cut gate by choosing between two options, and it cannot be used as is. .

[Means to solve the problem]

In view of the above points, the present invention solves problems c and d found in the above-mentioned prior art and devises automatic control. a structure that is suspended from a plurality of pieces around the periphery of the opening so as to surround the opening, closes the opening when it swings in a horizontal direction, and swings in a direction in which it hangs from the closed state; a movable blade that forms a cylindrical shielding wall when the blade moves and changes the central opening area steplessly in the middle of the swing; a drive mechanism that swings the movable blade; and a drive mechanism that swings the movable blade; Detecting the disposed weighing hopper and the weight of the powder deposited on the hopper,
a control mechanism that operates the drive mechanism according to the weight to steplessly and automatically control the opening area of the movable blade, and each single piece of the movable blade has one side thereof are located on the outside of the side of an adjacent single piece, and the other side is located on the inside of the side of the adjacent single piece, and the only said drive mechanism is on the outside of any single piece. Provided is a flow rate adjustment device for powder or granular material, characterized in that:

[Effect]

With the above configuration, all the single pieces of the movable blade are lined up like a row of dominoes, and when the drive mechanism installed outside any single piece is driven, all the pieces start from that single piece. The piece sways. The drive mechanism is installed uniquely and outside any single piece. Further, each movable blade forms a cylindrical shielding wall against powder particles and dust when each single piece is in a hanging state.

When the adjustment device transfers the required amount of powder from the upper structure to the hopper, the hopper is initially empty, so the control mechanism detects this and opens the movable blades wide to transfer a large amount of powder. Let it flow down. As the powder accumulates in the hopper, weight gradually accumulates, so the control mechanism detects this and gradually closes the movable blades, allowing a small amount of the powder to gradually flow down.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a cylindrical upper structure installed on the conveyance path, the lower end of which is open.

A flange portion 2 is welded to the outer peripheral edge of the opening, and the flange portion 2 is divided into at least three or more single pieces so as to surround the opening. is closed and swings in the direction of hanging down from the closed state (first
A movable blade 3 that forms a cylindrical or polygonal cylindrical shielding wall in the state shown in the figure) and that changes the central opening area 31 steplessly in the middle of the swing is suspended by holding a pin 4 and a ball 5. ing. Each single piece of the movable blade 3 is formed into a substantially trapezoidal planar shape to form the cylindrical or polygonal cylindrical shielding wall, and is given a predetermined curvature as necessary. Also, one side 3a of each single piece is located outside the side 3b of the adjacent single piece, and the other side 3c is the side 3d of the adjacent single piece.
They are arranged so that they are located inside the . Additionally, each single piece is made of a predetermined wear-resistant material or has a surface coated with a wear-resistant material. A drive mechanism 8 such as an actuator is installed on the outside of any single piece, and when the drive mechanism 8 is driven, all the single pieces swing, and the central opening area 31 changes steplessly according to the swing angle. change.

A metering hopper 6 is disposed below the movable blade 3, and a cylindrical canvas 7 is stretched between the hopper 6 and the flange portion 2. A weighing sensor 9 is installed in the hopper 6 to detect the accumulated weight of the powder material A, and based on a detection signal from the sensor 9, a control mechanism 10 operates a drive mechanism 8 according to the weight to control the movable blades. 3, the opening area 31 is controlled steplessly and automatically.

When the required amount of powder A is transferred from the upper structure 1 to the hopper 6 using the adjustment device having the above configuration, the hopper 6 is initially empty, so the control mechanism 10 detects this and opens the movable blades 3 wide. As the powder and granular material A flows down in large quantities, and as the powder and granular material A accumulates in the hopper 6, the weight is gradually accumulated, so the control mechanism 10 detects this and gradually closes the movable blade 3. Gradually a small amount of powder A is allowed to flow down, thereby making it possible to proceed with the work smoothly and quickly.

Further, according to the adjusting device having the above configuration, all the single pieces can be swung starting from the single piece by simply driving the only drive mechanism 8 installed outside of the single piece. Therefore, the drive mechanism 8 is the only one installed, and moreover, it is installed outside any single piece, so that the number of drive mechanisms 8 installed can be reduced compared to the prior art, and freedom in installation locations can be obtained. In addition, since each movable blade 3 forms a cylindrical shielding wall against the powder and granules A and dust when each single piece is in a hanging state, a part of the falling powder and granules A may leak outside, and the dust may can be prevented from being widely diffused to the outside, and in this embodiment, since the canvas 7 is also provided, this effect can be further enhanced.

〔Effect of the invention〕

The flow rate adjusting device of the present invention has the following effects due to the above configuration and operation.

A Arrange each single piece of the movable blade so that one side is located outside the adjacent single piece and the other side is located inside the side of the adjacent single piece, and All single pieces can be swung by simply driving the only drive mechanism installed on the outside of the piece.
Reduces the number of drive mechanisms installed compared to conventional technology,
You can have freedom of installation location.

B Since the movable blades form a cylindrical shielding wall against powder, granules and dust when each single piece is in a hanging state, some of the falling powder and granules may leak outside, or dust may leak outside. This can prevent it from spreading widely.

C The weight of the powder and granules accumulated in the hopper is detected and the drive mechanism is operated according to the detected weight to steplessly and automatically control the opening area of the movable blades, so that the appropriate amount of powder and granules are always available. This allows the work to proceed smoothly and quickly.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing the open state of the flow rate regulating device according to the embodiment of the present invention, FIG. 2 is a plan view showing the middle stage of the swinging of the movable blade, and FIG. 4 is an enlarged sectional view of part A in FIG. 1; FIG. 5 is a vertical sectional view showing the flow rate regulating device in a nearly closed state; and FIG. 6 is a plan view showing the movable vane in the same state. It is. 1... Upper structure, 2... Flange portion, 3...
Movable blades, 3a, 3b, 3c, 3d...Side sides, 6
... Weighing hopper, 8... Drive machine, 9... Weighing sensor, 10... Control mechanism.

Claims (1)

[Scope of Claims] 1. An upper structure having an opening at the bottom; a plurality of upper structures suspended around the periphery of the opening so as to surround the opening, and when swinging in a horizontal direction, the opening a movable vane that forms a cylindrical shielding wall when the movable vane closes a portion of the movable vane and swings in a direction in which it hangs from the closed state, and steplessly changes the opening area of the center in the middle of the swing; a drive mechanism for swinging the movable blade; a weighing hopper disposed below the movable blade; detecting the weight of the powder deposited on the hopper;
a control mechanism that operates the drive mechanism according to the weight to steplessly and automatically control the opening area of the movable blade, and each single piece of the movable blade has one side thereof. are located on the outside of the side of an adjacent single piece, and the other side is located on the inside of the side of the adjacent single piece, and the only said drive mechanism is on the outside of any single piece. A flow rate adjustment device for powder or granular material, characterized in that: