JPH05322055A - Valve for powder/grain - Google Patents

Abstract

PURPOSE:To downsize the drive mechanism of a powder/grain valve which controls the flow rate of powder/grain, and to control the flow rate with accuracy. CONSTITUTION:Both the ends of a throttle cylinder 2 capable of being throttled so as to be deformed, are connected to a rotating cylinder 3 and a fixed cylinder 4, the output cylinder 6 of an ultra sonic motor 5 is connected to the rotating cylinder 3 in such a way as to be freely slidable in the axial direction with a ring type ultra sonic motor engaged with the outer circumference of the fixed cylinder 4, and a spring member 15 energizing the cylinder in the axial direction is interposed between the output cylinder 6 of the ultra sonic motor and the rotating cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material valve which is provided in the middle of a conduit for conveying granular material so that the amount of granular material conveyed can be controlled.

[0002]

2. Description of the Related Art When a powder or granular material is conveyed through a pipeline, a powder or granular material valve is provided in the pipeline to control the flow rate of the powder or granular material. In the conventional powder-particle valve, a cloth cylinder that can be deformed by drawing is provided in the middle of the pipeline, a worm gear is attached to the outer periphery of one end of the cloth cylinder, and the worm gear is rotated by the worm to rotate the cloth cylinder. The body is squeezed and deformed. The worm is driven by reducing the rotation of the electric motor with a speed reducer.

[0003]

In the conventional granular material valve, the electric motor is driven and the cloth cylinder which can be drawn and deformed is rotated through the speed reducer, so that the drive mechanism becomes large and the arrangement is improved. Not very desirable for space. Further, even if the electric motor is stopped at a predetermined rotation in order to control the throttle amount of the cloth tubular body, the inertial rotation causes the rotation more than a predetermined angle, resulting in inaccurate flow rate control. Therefore, an object of the present invention is to reduce the size of the driving mechanism for the granular material valve and to accurately control the flow rate.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a granular material valve provided in the middle of a granular material conveying pipeline, and achieves the above object. Therefore, both ends of a diaphragm cylinder which is made of cloth or synthetic resin sheet and can be deformed are connected to the rotary cylinder and the fixed cylinder, respectively, and the rotary cylinder is rotatable relative to the fixed cylinder and slides in the axial direction. Configured as possible.
In addition, a ring type ultrasonic motor is fitted around the outer periphery of the fixed cylinder, and the output cylinder of the ultrasonic motor is connected to the rotary cylinder so as to be slidable in the axial direction. A spring member that urges in the axial direction is provided between them. Further, if the ultrasonic motor is provided with a rotation angle detecting device and the drive signal of the ultrasonic motor is controlled by the output signal thereof, the squeezing operation of the granular material valve can be easily controlled.

[0005]

In the powder / granular material valve of the present invention, the output cylinder is rotated by the driving of the ultrasonic motor, and the rotation-side end of the diaphragm cylinder is rotated within a range of 360 degrees. In response to this rotation, since the other end of the diaphragm cylinder is fixed to the fixed cylinder, the diaphragm cylinder is twisted and the cross-sectional area of the central portion is reduced, so that the flow amount of the powdery particles is limited. If the ultrasonic motor is rotated in the opposite direction, the twist of the diaphragm cylinder is returned, so the cross-sectional area of the central part of the diaphragm cylinder largely returns,
The distribution amount of the granular material will also increase. The operation of the ultrasonic motor is controlled by the motor drive circuit, and the control is performed based on the output signal of the rotation angle detecting device of the ultrasonic motor, so that the diaphragm can be controlled easily and accurately.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The powder / particle valve 1 is provided in the middle of a portion where the powder conveying path A is in the vertical direction, and can control the flow rate of the powder passing through the conveying path A. The powder / particle valve 1 is a ring type in which both ends of a diaphragm cylinder 2 made of cloth, synthetic resin sheet or the like which can be deformed are connected to a rotating cylinder 3 and a fixed cylinder 4, respectively, and fitted on the outer periphery of the fixed cylinder 4. The rotating cylinder 3 is rotated by the ultrasonic motor 5 and the diaphragm cylinder 2 is twisted so that the flow cross-sectional area thereof can be adjusted. An end of the rotating cylinder 3 is fitted to an end in the fixed cylinder 4, and the rotating cylinder 3 is configured to be rotatable with respect to the fixed cylinder 4 and slidable in the axial direction. A seal member 16 is interposed between the contact portion 3 and the fixed cylinder 4 so that the rotary cylinder 3 can smoothly rotate and slide in the axial direction.

As shown in FIG. 2A, ring-shaped flanges 2a and 2b are attached to both ends of the throttle cylinder 2, for example, one flange 2a is cut into two parts and both ends are axially connected to each other. 2 (b)
It can be bent as shown in. The flanges 2a and 2b at both ends of the throttle cylinder 2 are connected to the rotating cylinder 3 and the fixed cylinder 4, respectively. In order to transmit the rotation of the ultrasonic motor 5 to the rotary cylinder 3, the output cylinder 6 of the ultrasonic motor 5 is fitted to the outer periphery of the rotary cylinder 3 and is connected by the screw 7 to connect the output cylinder 6 and the rotary cylinder 3 to each other. And are designed to rotate together. Further, in the output cylinder 6, the hole through which the screw 7 passes is formed as an elongated hole 7a that is long in the axial direction, and when the rotating cylinder 3 slides in the axial direction with respect to the fixed cylinder 4, the screw 7 moves in the elongated hole 7a. You can slide. The rotating cylinder 3 and the diaphragm cylinder 2
Is connected to the flange 2a through a connecting ring 3a,
The output cylinder 6 and the flange 2a are adapted to rotate integrally.

A ring-shaped spring member 15 is provided between the output cylinder 6 and the rotary cylinder 3, and the rotary cylinder 3 is urged outward in the axial direction by the spring material 15, so that the diaphragm cylinder 2 moves in the axial direction. I'm getting nervous. Since the contact portion between the spring member 15 and the rotating cylinder 3 serves as a slide surface when the rotating cylinder 3 rotates, a slide member may be interposed in the contact portion. When the diaphragm barrel 2 is twisted by the rotation of the rotating barrel 3, the axial length of the diaphragm barrel 2 becomes shorter,
It is absorbed by the rotation cylinder 3 moving axially against the spring material 15.

As is well known, the ultrasonic motor 5 has a piezoelectric element 9 of two sections adhered to one side surface of a stator 8 and a high frequency drive signal having a 90-degree phase difference from the motor drive circuit 10 is attached to the piezoelectric element 9 of each section. Is input to generate a traveling wave in the stator 8. The rotor 11 is placed on the surface of the stator 8 opposite to the side where the piezoelectric element 9 is bonded, and the output cylinder 6 is continuously formed on the rotor 11. Stator 8
The outer peripheral portion of the rotor 11 and the rotor 11 are covered with a tubular casing 12, a disc spring 13 is arranged between the base plate 4a protruding from the fixed barrel 4 and the stator 8, and the end wall 12a of the rotor-side casing and the rotor 11 are arranged. A ball bearing 14 is disposed between the stator 8 and the rotor 1
It is designed to be in pressure contact with 1. The casing 1
2 is moved in the axial direction by rotating the outer peripheral screw part of the substrate 4a, and the spring strength of the disc spring 12 is adjusted. In the adjusted state, it is fixed by another screw. Has been done. Further, the base plate 4a of the fixed barrel 4 is connected to the flange 2b, and the transfer conduit A is attached to the base plate 4a so that the aperture cylinder 2 and the transfer conduit A are communicated with each other.

The ultrasonic motor 5 is constructed as described above, and the rotor 11 is rotated by the traveling wave generated in the stator 8 so that the output cylinder 6 rotates the rotary cylinder 3. .. The rotation of the rotary cylinder 3 causes the diaphragm cylinder 2 to be twisted so that the flow cross-sectional area thereof is controlled. Encoder 1 in casing 12 of ultrasonic motor 5
7 is provided and the rotor 1 facing the encoder 17
A position indicator 18 is provided along the outer peripheral surface of the rotor 1 to detect the rotational position of the rotor. Further, the detection signal of the encoder 17 is input to the motor drive circuit 10,
The motor drive circuit 10 can control the drive of the ultrasonic motor 5 based on the detection signal.

[0011]

In the powder and granular material valve of the present invention, since the diaphragm cylinder is twisted by the ring type ultrasonic motor, the driving device becomes small and desirable for the space for arrangement, and the motor position driving device controls the motor driving circuit. Therefore, it is easy to control the aperture amount, and the ultrasonic motor is stopped immediately when the drive signal from the motor drive circuit is stopped, so that the aperture amount can be accurately controlled.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a powder / particle valve of the present invention.

FIG. 2 is a cross-sectional view (a) of a throttle cylinder of a powder and granular valve and an explanatory view (b) showing an operating state of a flange of the throttle cylinder.

[Explanation of symbols]

 2 Throttle tube 3 Rotating tube 4 Fixed tube 5 Ultrasonic motor 17 Encoder

Claims (2)

[Claims] 1. A powder and granular material valve provided in the middle of a powder and granular material conveying pipe line, wherein both ends of a diaphragm deformable diaphragm cylinder made of cloth, synthetic resin sheet or the like are provided as a rotary cylinder and a fixed cylinder, respectively. In addition to connecting, the rotating cylinder is configured to be rotatable with respect to the fixed cylinder and slidable in the axial direction, and a ring type ultrasonic motor is fitted around the outer circumference of the fixed cylinder to form the output cylinder of the ultrasonic motor. A granular material valve, characterized in that it is connected to a rotary cylinder so as to be slidable in the axial direction, and a spring member is provided between the output cylinder of the ultrasonic motor and the rotary cylinder so as to urge it in the axial direction. 2. The powdery granular material valve according to claim 1, wherein the ultrasonic motor is provided with a rotation angle detecting device, and a drive circuit of the ultrasonic motor is controlled by an output signal thereof.