JP3295341B2 - On-off valve structure for granular materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to fine particles and small particles such as iron powder and sand (hereinafter collectively referred to as "particles" in this specification).
The present invention relates to an on-off valve structure for a granular material that opens and closes an outlet through which air is discharged.

[0002]

2. Description of the Related Art Conventionally, as a valve structure for opening and closing a discharge port of a granular material, a conical cone is disposed below the discharge port so as to be vertically movable, and the cone is inserted into the discharge port by a driving force of a cylinder. Is held in this position, and the outlet is closed with a cone. In this structure, since the cone is disposed below the discharge port, there is a problem that the cone must be moved up and down by using a cylinder having a large driving force under the pressure of the granular material. Further, since the cone is disposed below the discharge port, there is a problem that the discharged granules are continuously received and the durability of the cone is reduced. Furthermore, since the discharge port is closed by inserting the cone into the discharge port, it is easy to bite the granular material between the outer surface of the cone and the inner peripheral edge of the discharge port. There is a problem that a gap is formed between the peripheral edge and the outer surface of the cone, and the outlet is not sufficiently closed. If there is a pressure difference between the room where the powder and granules are stored and the room below the discharge port where the powder and granules are discharged, the gap between the inner peripheral surface of the discharge port and the outer surface of the cone However, there is a problem that the granules are sucked in and the outflow of the granules cannot be stopped sufficiently.

[0003]

A first object to be solved by the present invention is to solve these problems of the prior art, to close the discharge port without biting the particles, and to shut off the particles. An object of the present invention is to provide an on-off valve structure for a granular material that can reliably perform the above-mentioned operation and can reliably shut off air. A second object is to reduce the resistance generated by contact with the granular material and to reduce the driving force of the cylinder.

[0004]

Means for Solving the Problems 1) Discharge of the lower part of the powder storage tank
Exhaust is discharged from the outlet to the lower chamber, where the particulate matter is deposited in the lower chamber.
An opening / closing valve structure of a discharge port at a place where the discharge port is to be provided, wherein a seal plate projecting in a flange shape around the discharge port of the granular material is attached at a position higher than the height of the discharge port, and has an opening larger than the discharge port. A bottomed cylindrical body is arranged below the outlet, and the cylindrical body is rotatably rotatable from a position separated outward from directly below the outlet to a position where an opening peripheral edge of the cylindrical body is in close contact with the seal plate. Attach , and the outer peripheral surface from the opening of the cylinder to the bottom
Curved in an arc around the center axis of rotation of the body,
The cylindrical body should always be outside the accumulated powder in the lower chamber
The on- off valve structure for granular material that has a longer length and facilitates movement of the cylindrical body in the granular material

[0005]

According to the present invention, the cylindrical body is turned to the discharge port side of the granular material, and the opening peripheral edge of the turned cylindrical body is brought into close contact with a seal plate around the discharge port to make the discharge port airtight. Close to. By bringing the opening edge of the cylindrical body into close contact with the seal plate in a position where there is no granular material on the outer periphery of the discharge port, without biting the granular material between the peripheral edge of the opening of the cylindrical body and the outer peripheral surface of the discharge port, The outlet can be closed in an airtight manner. Since the granular material accumulates in the form of a mountain having the top below the discharge port, the granular material does not contact the seal disc, and the peripheral edge of the opening of the cylindrical body can be in close contact with the seal disc. In addition, since the cylindrical body moves in the powder body so as to take in the granular material of the moving part of the cylindrical body into the cylindrical body and does not push and move the granular material, the cylindrical body can be smoothly powdered. It can be closed by moving inside the body. For this reason, even if the granular material has accumulated near the outlet, the cylindrical body can close the outlet in an airtight manner without biting the granular material. In the case of opening the discharge port of the powder and granular material, the discharge port can be opened by rotating the cylindrical body away from the discharge port. In addition, the powder and the granular material taken into the cylinder are discharged out of the cylinder by the rotation of the cylinder because the cylinder is inclined by the rotation of the cylinder. In the present invention, since the outer peripheral wall of the cylindrical body is curved in an arc shape along the rotation center axis of the cylindrical body, the cylindrical body can move in the powder and granular material with small resistance, and the driving force of the cylindrical body is reduced. Can be smaller.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION It is preferable that the outer surface of a cylindrical body according to the present invention be curved in an arc shape with the same curvature as the rotational radius of the cylindrical body around the rotation center axis of the cylindrical body. Further, it is preferable to lengthen the cylindrical body so that the bottom surface of the cylindrical body is always outside the granular material.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings. FIG.
2 is a front view of the first embodiment, FIG. 2 is a plan view of the first embodiment, FIG. 3 is a right side view of the first embodiment, FIG. 4 is a sectional view taken along line AA in FIG. 2, and FIG. FIG. 6 is an explanatory view showing an open state of the discharge port of the powder tank, and FIG. 6 is an operation explanatory view showing an operation of closing the discharge port of the powder storage tank in the first embodiment.

Example 1 (see FIGS. 1 to 6) In the drawings, reference numeral 1 denotes a powder storage tank, 2 denotes a discharge port of the powder storage tank 1, and 3 denotes a seal provided around a discharge port 2 on a lower surface of the powder storage tank 1. The board 4 has a rigid cylindrical body rotatably provided in the vicinity of the discharge port 2 and has an open upper surface, 5 has a tapered upper peripheral edge of the upper surface of the cylindrical body 4, and 6 has a rotatable rotation of the cylindrical body 4. An axis, 7 is a curved surface curved in an arc around the rotation axis 6, 9 is an opening through which the rear part of the cylinder 4 can enter, 10 is a powdery material, and 11 is a driving source for rotating the cylinder 4 A rotary cylinder 13, an inverted U-shaped hook blanket provided on the upper part of the cylinder 4, a projection 14 projecting horizontally from the hook blanket 13, a projection 15 mounted on the projection of the hook blanket 13 and The locking pin 16 provided on the inner surface is inserted into the hollow portion of the hook blanket 13 to connect the rotating shaft 6 and the cylinder 4. A pair of arms 16 are locking pins provided on the inner surface of the arm 15.

A first embodiment shown in FIGS. 1 to 6 will be described. When closing the discharge port 2 of the granular material 10, the rotary cylinder 11 is driven to rotate the rotary shaft 6, and the upper peripheral edge 5 of the upper surface of the cylindrical body 4 is sealed with the outer periphery of the discharge port 2 of the powder storage tank 1. Board 3
The discharge port 2 is closed by the cylindrical body 4 by rotating the cylindrical body 4 so that the cylindrical body 4 is in close contact. Since the outer peripheral edge 5 of the upper surface of the cylindrical body 4 is brought into close contact with the seal plate 3 on the outer periphery of the discharge port 2, the granular material 10 is interposed between the inner peripheral surface of the upper surface of the cylindrical body 4 and the outer peripheral surface of the discharge port 2. Therefore, there is no gap between the inner peripheral surface of the upper opening of the cylindrical body 4 and the discharge port, so that the cylinder 4 can be reliably airtightly closed. Further, since the granular material does not contact the seal plate 3 provided on the outer periphery of the discharge port 2, the discharge port can be closed in an airtight manner. Powder storage tank 1
Even if the granular material 10 is deposited near the discharge port 2 of the
The cylindrical body 4 is used as the cylindrical body 4 to
Since the cylindrical body 4 travels smoothly and reliably without receiving much resistance of the granular material 10, the discharge port 2 can be closed in an airtight manner.
Further, since the outer peripheral surface of the cylindrical body that advances and retreats toward the discharge port is curved in an arc around the rotation axis, it can move smoothly in the granular material, and the opening and closing operation of the discharge port can be performed smoothly.

When the discharge port 2 of the powder storage tank 1 is released, the discharge port 2 is released by driving the rotary cylinder 11 to separate the cylinder 4 from the discharge port 2. The rear portion of the cylinder 4 enters the opening 9 of the casing, whereby the cylinder 4 is inclined, the rear portion of the cylinder 4 is lifted, and the upper opening of the cylinder 4 can be directed downward, The granular material 10 taken into the cylinder 4 is discharged out of the cylinder 4.

[0011]

According to the present invention, the driving force for driving the cylindrical body can be reduced, the running cost can be reduced, and the economy is improved. In addition, since the upper opening of the cylindrical body is fitted around the outlet and the outlet is closed, there is no gap between the upper surface opening of the cylindrical body and the outlet, so that no gap is generated. The outlet can be reliably closed. Furthermore, since the cylindrical body is rotated and fitted to the discharge port, even when the granular material is loaded near the discharge port, the cylindrical body is positioned near the discharge port while scooping the granular material into the cylindrical body. The outlet can be approached and the outlet can be reliably closed. Since no member for opening / closing the discharge port is arranged immediately below the discharge port, the discharge of the powdery material can be performed very smoothly.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a right side view of the first embodiment.

FIG. 4 is a sectional view taken along the line AA in FIG. 2;

FIG. 5 is an explanatory view showing a released state of a discharge port of the powder storage tank in the first embodiment.

FIG. 6 is an operation explanatory view showing an operation of closing an outlet of a powder storage tank in the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Powder storage tank 2 Discharge port 3 Seal board 4 Cylindrical body 5 Upper peripheral edge of opening 6 Rotating shaft 7 Curved surface 8 Missing number 9 Opening 10 Powder 11 Rotary cylinder 12 Missing number 13 Hook blanket 14 Projection 15 Arm 16 Lock pin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 1/16 F16K 1/20 B65G 65/30-65/48

Claims (1)

(57) [Claims] (1) discharging from a lower outlet of a powder storage tank to a lower chamber;
Opening of the outlet where dust is discharged and deposited in the lower chamber
A valve-closed structure, a seal plate that protrudes in a flange shape around the outer periphery of the outlet of the granular material is attached at a position equal to or higher than the height of the outlet,
A bottomed cylindrical body having an opening larger than the discharge port is arranged below the discharge port, and a position from a position separated outward from immediately below the discharge port to a position where an opening peripheral edge of the cylindrical body is in close contact with the seal plate. The cylinder is attached rotatably , and
The outer peripheral surface from the opening to the bottom is around the rotation axis of the cylinder
It is curved in an arc shape, and the bottom of the cylinder is
Increase the length of the cylinder so that it is always outside the granules,
Open / close valve structure for powders that facilitates movement in the body .