JP2014020497A - Non-contact type valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-off valve which provides a metal casing or the like, and a valve body in non-contact with each other, does not produce metal powder, minimizes a biting quantity of powder and granular materials and can be lightly operated.SOLUTION: A non-contact type valve is characterized in that a valve body 2 is pivotally supported rotatably in the direction vertical to a pipe line on a middle portion of a casing 1, a drawing-in prevention plate 3 of powder and granular materials is disposed at an opening edge 1a of an inlet part of the casing 1, a biting prevention part 4 made in such a shape as to reduce the quantity of the powder and granular materials which are bit at a time is provided to face the drawing-in prevention plate 3 and, upon the rotation of the valve body 2, the opening edge 1a, the drawing-in prevention plate 3 and the biting prevention part 4 are disposed in non-contact with an outer circumferential surface of the valve body 2 with a fine interval.

Description

  The present invention relates to a non-contact type valve that opens and closes a pipeline that supplies resin pellets and other powders to piping.

  Conventionally, many valves such as a gate valve, a ball valve, a slide gate valve, and a butterfly valve exist and are utilized as valves for opening and closing the pipeline. However, when the valve body is opened and closed in the casing, in most cases, the casing and the valve body rub against each other, and there is a concern about the generation of metal powder.

  In addition, various attempts have been made to prevent the granular material from being caught between the casing and the valve body, for example, mounting of a funnel-shaped cylinder or the like, but it is insufficient.

  In the non-contact type valve according to the present invention, a valve body pivotally supported so as to be rotatable in a direction orthogonal to a pipe line includes an opening edge of a casing, a pull-in prevention plate, and a biting prevention portion (hereinafter abbreviated as a casing or the like). Is provided in a non-contact manner with a minute interval. Since the valve body and the casing are not in contact with each other, there is no generation of metal powder, and there is no possibility of generating a powder body mixed with foreign matter.

  More specifically, by providing a biting prevention portion that takes a shape that reduces the number of powder particles biting at a time between the casing and the valve body, the valve body opening / closing operation is smoothly performed without delay. It has been devised.

Japanese Patent Laid-Open No. 11-82760 Japanese Patent Laid-Open No. 2001-254851

  If a large number of powder particles are caught between the casing and the valve body at once, the valve body becomes difficult to rotate, and the function as an on-off valve cannot be performed, and supply or blocking of the powder particles cannot be performed. .

  When metal powder is generated by rubbing the metal valve body and the casing, the granular material becomes a foreign matter mixed product and cannot be used or the commercial value is lowered.

  The present invention eliminates the above-mentioned difficulties, and has a configuration in which the casing and the valve body are installed in a non-contact manner, and the number of powder particles biting at a time between the casing and the valve body is reduced. Therefore, a non-contact type valve that does not hinder the opening and closing operation of the valve is provided.

  1stly, in the valve which opens and closes the pipe line which supplies resin pellets and other granular materials to piping, a valve body is orthogonal to a pipe line in the intermediate part of the casing which has an inlet part and outlet part which are directly connected with a pipe line It is pivotally supported so that it can be rotated in the direction in which the powder is attracted to the opening edge of the inlet of the casing, and the granular material such as resin pellets bites into the opening edge at the same time. And a biting prevention portion having a shape that reduces the amount of the valve body, and when the valve body rotates, the pull-in prevention plate and the biting prevention portion are provided in a non-contact manner with a small distance from the outer peripheral surface of the valve body. This is a non-contact type valve characterized by this.

  Secondly, the pull-in preventing plate for preventing the pulling-in of the granular material is an inclined surface opened at a right angle or slightly larger than the tangential direction of the valve body.

  Third, the biting prevention part is one or a plurality of hook-shaped protrusions.

  Fourthly, the valve body is provided with a shaft portion on the outer side and is opposed to each other with a constant width between the outer peripheral edges of the disc portions and closed with an arc-shaped cross section that closes the opening edge of the casing. It is formed from the board.

  Fifth, the valve body is rotated by connecting an external drive source to the shaft of the valve body.

  Sixth, the lower end surfaces of the pull-in prevention plate and the biting prevention portion are curved surfaces concentric with the valve body.

  Seventhly, the biting prevention part is any one of an inclined part, a central concave part, a chevron part, and a plurality of protrusions.

In any of the above cases, the opening edge, the pull-in prevention plate, the biting prevention portion, and the outer peripheral surface of the valve body are provided in a non-contact manner with a minute interval of about 0.1 to 0.9 mm.
(Function)

  The pull-in prevention plate that is inclined at the opening edge of the casing inlet is an inclined surface that is open at a right angle or slightly larger than the tangential direction of the valve body, so that the closing plate of the valve body and the end of the pull-in prevention plate Since the indentation formed by is not an acute angle, the difficulty of pulling in and sandwiching the granular material during the opening operation of the valve body has been solved.

  Further, a biting prevention portion is provided at the opening edge so as to face the pull-in prevention plate. During the closing operation of the valve body, due to the crossing angle between the edge of the closing plate and the biting prevention part, the powder particles are released onto the cavity and the closing plate, thereby reducing the number of bites at once. It is supposed to be.

When the valve body is opened, the granular material supplied by the silo or hopper passes through between the drawing-in prevention plate and the biting prevention portion from the inlet portion of the casing as shown in FIG. And is supplied to piping and the like. At this time, the flow of powder particles continues in the direction of the arrow inside the casing and the cavity of the valve body.
When the valve body starts to close, the edge of the closing plate of the valve body works to block the flow of the powder from the side.

  As described above, the non-contact type valve of the present invention blocks the flow of the granular material with less resistance due to the interaction between the end edge portion of the closing plate, the opening edge, the anti-retraction plate and the anti-engagement portion, and the valve body is obstructed. Can rotate smoothly.

  In the case of granules such as resin pellets, the number of bites is reduced, and there is an effect of minimizing breakage due to bites.

  Since the opening edge, the pull-in prevention plate, the biting prevention portion, and the outer peripheral portion of the valve body are provided in a non-contact manner with a minute gap, there is no generation of metal powder due to contact between them.

  When the biting prevention part is a hook-shaped protrusion, even when the pellet is relatively slippery due to the progress of the closing plate during the closing operation of the valve body, the pellet is closed by sliding along the ridgeline inclined part of the hook. Therefore, only the two innermost portions on both sides of the hook-shaped projection portion become the biting portions. Therefore, the number of biting particles can be minimized.

  In the non-contact type valve of the present invention, the valve body pivotally supported so as to be rotatable in a direction orthogonal to the pipe line is provided in a non-contact manner with a small interval between the opening edge, the pull-in prevention plate and the biting prevention part, In addition, since the pulling and biting of the granular material is reduced, a quick opening and closing operation is possible when necessary.

  In particular, since the number of the powder particles that slide due to the interaction between the closing plate of the valve body and the biting prevention portion and the bite is reduced, the valve body can be opened and closed without any trouble. Moreover, since it is non-contact, there is no possibility that metal powder etc. will arise and the generation | occurrence | production of inferior goods by foreign material mixing will not arise.

The top view of this invention non-contact type valve shows the state connected with the drive source. It is a principal part longitudinal cross-sectional view of a non-contact type valve. It is the perspective view which showed the valve body typically. It is a longitudinal cross-sectional view of a state in which the valve body is opened. It is a longitudinal cross-sectional view of a state in which the valve body is closed. It is explanatory drawing which shows the sliding of a granular material with the motion of a closing plate, and a hook-shaped projection part. It is explanatory drawing which shows the effect | action of a drawing-in prevention board. It is explanatory drawing which shows the case where it is unsuitable as a drawing-in prevention board. It is explanatory drawing which shows several types of patterns which the drawing-in prevention board and the induction | guidance | derivation part faced.

  Examples are shown below.

  Hereinafter, it demonstrates in detail according to drawing.

  FIG. 1 is a plan view of a non-contact valve as viewed from above, and shows a state where cylinders are connected as an example of a drive source.

  Reference numeral 1 denotes a casing, which has an inlet portion and an outlet portion that are directly connected to the pipeline. 1a is an opening edge provided at the entrance.

  Reference numeral 2 denotes a valve body, which is an intermediate portion of the casing 1 and is pivotally supported so as to be rotatable in a direction orthogonal to the pipe line. In FIG. 1, the valve body 2 is in a closed state.

  Reference numeral 3 denotes a pull-in prevention plate, which is provided on the inlet opening edge 1 a of the casing 1. When opening the valve body, the inclined surface has a right angle with respect to the tangential direction of the valve body or a slightly larger angle so as not to pull in the powder particles.

  The size of the resin pellet used in the examples was 3 mm, and the gap between the opening edge, the pull-in prevention plate and the biting prevention portion, and the valve body was 0.2 mm.

  Reference numeral 4 denotes a biting prevention portion, which is provided on the opening edge 1 a so as to face the pull-in prevention plate 3. Reference numerals 4a and 4b denote the innermost portions.

  When closing the valve body, if a hook-shaped projection is used, it will escape with the edge 6a of the closing plate 6 up and down the closing plate 6 while sliding the granular material along the inclined surface of the flange. As a result, the biting points are only the innermost portions 4a and 4b in the direction in which the valve is closed, and the number of powders biting at a time is reduced.

  When the granular material is a granular material such as a resin pellet, the number of bites at one time is reduced, and breakage of the pellet is also greatly reduced.

  The lower end surface of the biting prevention portion 4 is not in contact with the closing plate of the valve body, and is formed on a curved surface concentric with the valve body.

  The casing, the pull-in prevention plate, and the biting prevention portion of the present invention are all made of metal, and for example, SUS304 is used.

  The illustrated biting prevention portion has a zigzag ridge shape, but is not limited thereto.

  FIG. 9 shows a pattern in which an inclined portion, a central concave portion, a chevron portion, and a plurality of protrusions are used instead of the hook-shaped protrusion. Although these have a difference in sliding action, they are properly used depending on the properties of the granular material.

  In any case, if the valve body progresses, the powder particles can be slid along the shape of the biting prevention part, or the quantity of biting at once can be reduced between the valve body and the biting prevention part. Good.

  FIG. 2 is a longitudinal sectional view of the main part, and the valve body 2 is bridged with a constant width between the disk parts 5 and 5 at both ends and the outer peripheral edges of these disk parts so as to block the entire opening edge 1a. It comprises a closing plate 6 having an arcuate cross section.

  Reference numerals 6a and 6b denote end edges of the closing plate, which may be tapered.

  Reference numeral 7 denotes a shaft portion which is provided outside the both side disc portions of the valve body and is supported by a bearing portion 8 including a bearing 8a. The bearing portion 8 is attached to the casing 1 with bolts or the like.

  Reference numeral 9 denotes a cover of the bearing portion 8. Reference numeral 10 denotes a cavity.

  A drive source 11 provided outside the casing is connected to the shaft portion 7 to rotate the valve body. Although the illustrated example is a cylinder, the present invention is not limited to this, and a motor provided via a reduction gear may be used, or manual rotation may be used.

  4 and 5 are longitudinal sectional views showing the open / close state of the valve. FIG. 4 shows the open state, and FIG. 5 shows the closed state. The vertical arrows indicate the flow of powder.

  FIG. 6 is a perspective view schematically showing the operation when the hook-shaped protrusion is used as the biting prevention portion.

FIG. 7 shows the operation of the pull-in prevention plate.
FIG. 8 shows an example of an inappropriate pull-in prevention plate. In this case, there exists a difficulty in which a granular material is drawn in to a wedge part.

FIG. 9 shows several examples of patterns in which the pull-in preventing plate and the biting-in preventing portion are opposed to each other.
As the biting prevention part, (a) is an inclined part, (b) is a central concave part, (c) is a chevron part, and (d) is a plurality of protrusions. In either case, there is a difference in the sliding action, but the shape is such that the number of powders that are bitten at a time is reduced.

  Since the casing and the valve body are not in contact with each other, there is no generation of metal powder or the like, and a pure powder particle can be provided. Accordingly, the present invention can be widely applied to supply of plastic parts to manufacturing processes of automobile parts, pharmaceutical-related equipment, and manufacturing processes of resin molded products.

  The edge of the closing plate of the valve body acts so as to cut off the vertical flow of the granular material from the side surface, reducing the number of bites, so that the valve body can be opened and closed quickly and lightly. It can be applied to pellet supply and other industrial equipment.

1: Casing 1a: Opening edge 2: Valve body 3: Pull-in prevention plate 4: Clogging prevention portions 4a, 4b: Innermost portion 5: Disc portion 6: Closing plates 6a, 6b: End edge portion 7 of the closing plate: Shaft part 8: Bearing part 8a: Bearing 9: Cover 10: Cavity part 11: Drive source 12: Granule

Claims (8)

In the valve that opens and closes the pipeline that supplies resin pellets and other powders,
A valve body is pivotally supported in a middle part of the casing having an inlet part and an outlet part that are directly connected to the pipe line so as to be rotatable in a direction orthogonal to the pipe line, and the powder body is prevented from being drawn into the opening edge of the casing inlet part. A plate is provided, and a biting prevention portion is provided to reduce the number of powder particles biting at once by facing the pull-in prevention plate, and when the valve body is rotated, an opening edge, a pull-in prevention plate, and A non-contact type valve characterized in that the biting prevention part is provided in a non-contact manner with a small distance from the outer peripheral surface of the valve body.   The non-contact type valve according to claim 1, wherein the pull-in preventing plate provided at the opening edge of the casing inlet portion is an inclined surface which is open at a right angle or slightly larger than the tangential direction of the valve body.   The non-contact type valve according to claim 1, wherein the biting prevention portion provided at the opening edge of the casing inlet portion is one or a plurality of hook-shaped protrusions.   2. The valve body according to claim 1, wherein the valve body includes disc portions at both ends provided with shaft portions, and a closing plate having an arcuate cross section that is bridged with a constant width between outer peripheral edges of the disc portions and closes the opening edge of the casing. Non-contact type valve.   The non-contact type valve according to claim 1, wherein a driving part provided outside is connected to a shaft part of the valve body to rotate the valve body.   The non-contact type valve according to claim 1, wherein lower ends of the pull-in prevention plate and the biting prevention portion are curved surfaces concentric with the valve body.   The non-contact type valve according to claim 1, wherein the biting prevention part is one of an inclined part, a central concave part, a chevron part, and a plurality of protrusions. As the granular material, resin pellets of about 1 to 4 mm are used, and the opening edge, the pull-in prevention plate and the biting prevention part are not spaced apart from the outer peripheral surface of the valve body with a minute interval (about 0.1 to 0.9 mm) The non-contact type valve according to claim 1, which is provided in contact.

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