JP2003128260A - Opening/closing valve device for powdery and granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically (naturally) prevent biting of a powdery and granular material between a valve element 14 and an edge of an inclined outlet 6 when the valve element 14 is to be closed. SOLUTION: The valve element 14 is pushed by a valve element pusher 21 so as to push the valve element 14 onto the edge of the inclined outlet 6 and to close the inclined outlet 6 with the valve element 14. At this operation, the valve element 14 oscillates in the direction of an arrow A in Fig. 1 with a horizontal supporting axis 13 as the center for the first, and when the valve element 14 is brought into contact with a lower edge of the inclined outlet 6, it oscillates in the counterclockwise direction in Fig. 1 with the point of contact with the inclined outlet 6 as the center. With the oscillation in the counterclockwise direction of the valve element 14, an elongate hole 16 is moved upward following the horizontal supporting axis 13 (a constriction part 13a). As a result, the valve element 14 closes the inclined outlet 6 while moving diagonally upward along a virtual inclined surface including the inclined outlet 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve device for powder and granular material.

[0002]

2. Description of the Related Art Conventionally, the following types of on-off valve devices for this type of powder and granular material have been known. A cylindrical casing having an inlet at the upper part and an inclined outlet at an acute angle to the horizontal plane with the axis vertically oriented, and an inclined outlet for opening and closing the inclined outlet of the cylindrical casing. It is known to have a freely movable valve element and an actuating device for actuating a swing arm (valve element). In the above-mentioned conventional on-off valve device, since the outlet is an inclined outlet, the powder on the upper surface of the valve body in the inclined state facing the inclined outlet when the discharge of the powdery particles is completed and the valve body is about to close. Granules flow down from the gap between the lower part of the valve body and the lower end of the inclined outlet edge, and it is difficult for the granular material to remain on the upper surface of the valve body.
When the valve body is closed, there is an advantage that powder particles are prevented from being caught between the valve body and the edge of the inclined outlet.

[0003]

Disadvantages of the Prior Art The above-mentioned conventional on-off valve device has the following drawbacks. Once the valve body closes, the valve body keeps close contact with the edge of the inclined outlet. There is no chance of discharging the granular material, and that state continues and the granular material remains attached to the edge of the valve body or the inclined outlet, and the edge of the valve element and the inclined outlet must be cleaned frequently. It had the drawback that it had to be.

[0004]

[Means for Solving the Disadvantages] The present invention employs the following means in order to eliminate the above disadvantages. The invention according to claim 1 is a tubular casing having an inlet at an upper portion and an inclined outlet at an lower portion that forms an acute angle with a horizontal plane, and an axial center of which is oriented in a vertical direction, and a tubular casing for opening and closing the inclined outlet of the tubular casing. Has a valve body that is directly or indirectly swingable, and a valve body pusher that is not connected to the valve body and that presses the valve body against the edge of the inclined outlet, and the valve body is normally a granular material. It is made to face the inclined outlet with a gap to allow passage of, and when the normal valve body is pressed against the edge of the inclined outlet by the valve pusher,
The valve body is configured to close the inclined outlet while moving obliquely upward along the virtual inclined surface including the inclined outlet. According to a second aspect of the present invention, a horizontal support shaft parallel to a virtual inclined surface including an inclined outlet is provided on an upper portion of the cylindrical casing,
The horizontal support shaft is fitted into the elongated hole of the upwardly projecting arm provided on the valve body, so that the valve body is swingable on the horizontal support shaft and the normal state valve body is pushed by the valve body pusher to the edge of the inclined outlet. It is the one according to claim 1, wherein when it is pressed against the portion, the inclined outlet is closed while moving obliquely upward along the virtual inclined surface including the inclined outlet.

[0005]

The present invention has the following effects due to the above-described structure. According to the invention of claim 1, when the valve body is closed, the powder particles are automatically (naturally) prevented from being caught between the valve body and the edge of the inclined outlet for the following reason. Therefore, it is not necessary to frequently clean the edge portion of the valve body and the inclined outlet. [Reason 1] The valve body is arranged so as to face the inclined outlet in a state where a gap allowing passage of the granular material is provided in the normal state, and the granular material remaining on the edge of the inclined outlet and the upper surface of the valve body. It has a structure to constantly drop and discharge. [Reason 2] When the valve body is pressed against the edge of the inclined outlet by the valve pusher, the valve element is configured to close the inclined outlet while moving diagonally upward along the virtual inclined surface including the inclined outlet. , Even if the powder and granules are caught between the valve body and the edge of the inclined outlet, the powder and granules that are caught in the valve body are pushed out upward as the valve body moves diagonally upward. . According to the invention of claim 2, the valve body can be given a predetermined movement with a simple structure.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. In this description, the front means the right side in FIG. 1, the rear means the left side in the figure, the left means the back side of the paper of FIG. 1, and the right means the front side.

An inlet 2 of an on-off valve device 4 for the granular material is connected to an outlet 2 at the lower part of the upper granular material storage tank 1. The on-off valve device 4 includes a tubular casing 7 having an inlet 5 at an upper portion, an inclined outlet 6 at a lower portion that forms an acute angle with a horizontal plane, and has a slanted outlet 6 opening toward the front, and an axial center of which is directed in the up-down direction. It has a cover 9 having a rectangular horizontal cross section, which covers 7 and is open downward. The width of the edge of the inclined outlet 6 is made as narrow as possible by chamfering the edge of the inclined outlet 6.

An inlet 11 of a lower granular material storage tank 10 is connected to the cover body 9.

Horizontal support shafts 13 (with their axes oriented in the left-right direction) parallel to a virtual inclined surface including the inclined outlet 6 are provided on the left and right portions of the upper portion of the cylindrical casing 7, and the horizontal support shafts 13 are constricted. The portion 13a is fitted into the elongated hole 16 of the upwardly projecting arm 15 provided in the plate-shaped valve body 14, and the valve body 1
The horizontal support shaft 13 is swingable. The elongated hole 16 is inclined downward toward the front and has a width equal to the diameter of the constricted portion 13a of the horizontal support shaft 13. With such a configuration, the valve body 14 can swing back and forth and can move in a direction parallel to the longitudinal direction of the long hole 16 within a range in which the long hole 16 moves along the horizontal support shaft 13. .

In the normal state (state shown by the solid line in FIG. 1), the valve body 14 is arranged to face the inclined outlet 6 with a gap 18 which allows the passage of powder particles. With such a configuration, it is possible to constantly drop and discharge the powder or granular material remaining on the edge portion of the inclined outlet 6 and the upper surface of the valve body 14. Therefore, the powder particles are hardly caught between the upper half portion of the valve body 14 and the edge portion of the inclined outlet 6.

A fluid pressure cylinder 20 is provided on the front wall of the cover body 9 so as to face the upper portion of the valve body 14 (upward from the center in the vertical direction), and a valve body pusher composed of a rod of the fluid pressure cylinder 20 is provided. Reference numeral 21 projects through the front wall of the cover body 9 so that its axis is oriented in the front-rear direction and projects into the cover body 9. The valve body pusher 21 pushes the valve body 14 against the edge of the inclined outlet 6 by projecting rearward from the standby position indicated by the solid line in FIG.

The tubular casing 7 is formed with a communication hole 23 for equalizing the pressure inside the tubular casing 7 and outside the tubular casing 7 (inside the cover 9). In addition, the size and shape of the communication hole 23 are determined so that the granular material does not flow out from the communication hole 23.

[0013]

Next, the operation of the embodiment of the present invention will be described. To store the granular material in the upper granular material storage tank 1, the valve body 14 is pushed by the valve body pusher 21 to
4 is pressed against the edge of the inclined outlet 6, and the valve body 14 closes the inclined outlet 6. During this operation, the valve body 14 first swings about the horizontal support shaft 13 in the direction of arrow A in FIG. When the valve body 14 hits the lower edge of the inclined outlet 6, this time it swings counterclockwise in FIG. 1 around the point of contact with the inclined outlet 6. With the rocking of the valve body 14 in the counterclockwise direction, the elongated hole 16 moves upward in the shape of the horizontal support shaft 13 (constricted portion 13a). As a result, the valve body 14 closes the inclined outlet 6 while moving obliquely upward along the virtual inclined surface including the inclined outlet 6. As is clear from this description, the elongated hole 16 is an elongated hole having an inclination such that the valve body 14 moves as described above. Due to this operation, even if the powder or granular material is caught between the valve body 14 and the edge of the inclined outlet 6, the caught powder or granular material can be pushed upward.
When the inclined outlet 6 is closed by the valve body 14, a predetermined amount of powder or granular material is supplied to the upper powder or granular material storage tank 1. Then, when a predetermined amount of the granular material is supplied to the upper granular material storage tank 1, the supply of the granular material to the upper granular material storage tank 1 is stopped. afterwards,
When the valve body 14 is freed by retracting the valve body pusher 21, the valve body 14 swings to the position indicated by the alternate long and short dash line in FIG. As a result, the granular material enters the lower granular material storage tank 10. Then, when the granular material in the upper granular material storage tank 1 falls into the lower granular material storage tank 10, the valve body 14 returns to the initial state (position indicated by the solid line in FIG. 1) due to its own weight.

[0014]

[Modifications, etc.] Modifications will be described below. (1) The powder and granules include powder, granules, minute flakes, short fiber pieces, and the like. (2) The shape of the valve body 14 is arbitrary. (3) The operating device of the valve body pusher 21 is arbitrary.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

4 Open / close valve device for powder and granular material 5 entrance 6 inclined exit 7 Cylindrical casing 20 fluid pressure cylinder 21 valve body pusher

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaaki Nosaka             2-19 Shodaikachi, Hirakata-shi, Osaka Matsu, Inc.             I Factory Osaka Plant (72) Inventor Tsutomu Ohno             2-19 Shodaikachi, Hirakata-shi, Osaka Matsu, Inc.             I Factory Osaka Plant (72) Inventor Yukio Yasuda             2-19 Shodaikachi, Hirakata-shi, Osaka Matsu, Inc.             I Factory Osaka Plant F-term (reference) 3E070 AA19 AB11 GA10 HA07 HB10                       HD01 QA01 VA15                 3F075 AA08 BA01 CA09 CB13 CD12

Claims (2)

[Claims] 1. A tubular casing having an inlet at an upper portion and an inclined outlet at an acute angle to a horizontal plane at a lower portion, and an axial center directed vertically, and a tubular casing for opening and closing the inclined outlet of the tubular casing, directly to the tubular casing. Alternatively, it has a valve body that is indirectly swingable, and a valve body pusher that is not connected to the valve body and that pushes the valve body against the edge of the inclined outlet, and the valve body normally passes through the granular material. When the valve body in its normal state is pressed against the edge of the tilted outlet by the valve body pusher, the valve body is slanted along the virtual tilted surface including the tilted outlet. An on-off valve device for powder and granular material that is adapted to close the inclined outlet while moving upward. 2. A horizontal support shaft parallel to an imaginary inclined surface including a sloped outlet is provided on an upper portion of the cylindrical casing, and the horizontal support shaft is fitted in a long hole of an upwardly projecting arm provided on the valve body. When the valve body is oscillated on the horizontal support shaft and pressed against the edge of the inclined outlet by the valve body pusher, the valve element moves diagonally upward along the virtual inclined surface including the inclined outlet and the inclined outlet. Claim 1 which is adapted to close
An on-off valve device for the described granular material.