JP4494032B2 - Rotary valve - Google Patents

Description

  The present invention relates to a rotary valve for discharging a powdery body. More particularly, the present invention relates to a rotary valve suitable for discharging dust, dust, small dust, and the like in a non-combustible waste disposal facility.

  As shown in FIG. 9, the non-combustible garbage G such as plastic collected is crushed by the garbage crusher 31 in the garbage disposal facility, and after having an appropriate size, is buried in the landfill. In the waste crushing process of this garbage disposal facility, dust, dust, small dust and other powdery materials d move to the atmosphere, so the dust crushing process equipment and surroundings are covered with powdery materials d and are difficult to clean. If the powdery material d accumulates, the operation of the equipment is affected. Therefore, the powdery body d is vacuum-sucked and collected by the recovery device 34 through the duct 33 together with the air a, and the recovered powdery body d is supplied to the rotary valve 1 through the hopper 35 and the discharge port 4 of the rotary valve 1 is recovered. Discharged from landfills and disposed of in landfills. On the other hand, the sucked air a is discharged from another discharge pipe.

  As shown in FIG. 8, a conventional rotary valve 1 is provided with a rotor plate 6 provided in a cylindrical housing 2 having a supply port 3 and a discharge port 4 so as to be radially rotatable so as to partition the inside of the housing 2. Has been. And the powdery body d supplied from the supply port 3 when the rotor plate 6 is rotated is discharged from the discharge port 4. By the way, if the interior of the housing 2 is not partitioned while maintaining the airtightness even when the rotor plate 6 rotates, the air a leaks and the recovery efficiency of the powdery material d by vacuum suction decreases. That is, the powdery body d cannot be efficiently discharged, and the powdery body d accumulates inside the duct 33 and the housing 2. In order to prevent these, the rubber member 25 is fixed to the front end portion of the rotor plate 6 with fixing bolts 17 and nuts 14, and the rubber member 25 is slid on the inner peripheral surface of the housing 2 to partition the inside of the housing 2 while maintaining airtightness. I am doing so.

  However, since the rubber member 25 is gradually worn as it slides, there is a gap with respect to the inner peripheral surface of the housing 2, and the rubber member 25 is easily chipped when an object is bitten, and needs to be frequently replaced. This replacement work of the rubber member 25 is time-consuming and expensive, and is a troublesome operation because it is a work in a narrow place. Further, since the operation of the rotary valve 1 is stopped during the replacement work, the operation of the entire garbage disposal facility is also affected.

  As a means of partitioning while maintaining the airtightness inside the rotary valve housing, a wear-resistant material is used for the sliding parts of the rotary valve rotor plate and the housing inner peripheral surface to reduce wear of the sliding parts. It has been proposed (see Patent Document 1). With this structure, wear of the sliding part can be reduced, but if the amount of wear increases, there will be a gap between the rotor plate and the inner peripheral surface of the housing, so it is necessary to replace the sliding part before the gap occurs. Become.

Moreover, although the field of use is completely different, a structure has been proposed in which a high-rotation rotary valve used in an engine or the like is always partitioned while maintaining airtightness inside the housing (see Patent Document 2). This rotary valve rotates a cylindrical rotor in a housing and allows gas to flow in and out through an opening provided in the rotor peripheral wall. In order to maintain airtightness at all times, a protrusion is provided on the outer periphery of the rotor, and the protrusion is pressed against the inner periphery of the housing with a spring or the like. According to this structure, even if the protrusion is worn, the protrusion is pressed against the inner periphery of the housing, and no gap is generated, so that airtightness can always be maintained. However, this proposal does not take into consideration that the protruding portion bites an object or reduces wear of the protruding portion. In addition, a structure for pressing the protruding portion so as not to cause a gap is not proposed.
Actual Kaihei 3-95324 Japanese Patent Laid-Open No. 11-6409

  The present invention has been made to solve the above-mentioned problems of the prior art. In other words, the interior of the housing can always be kept airtight, the rotor rotates smoothly, the sliding member wears and exchanges less frequently, and an efficient rotary valve that is relatively resistant to biting of objects is also available. It is to provide.

Rotary valve according to claim 1 of the present application is the so as to divide the cylindrical housing having a supply port and the discharge port of the powdered material, a rotary shaft provided in the axial direction of the housing, the interior of the housing from the rotary shaft toward the inner peripheral surface housing a rotor plate provided radially further be movable guide only in radial direction while being held between the rotor plate and the pressing plate, at least within the housing periphery In a rotary valve provided with a tip plate made of a self-lubricating resin at the tip sliding portion that comes into contact with the surface, a spring through shaft is erected on a spring fixing plate fixed to the rotor plate, and is attached to the spring through shaft. A spring as a biasing means is inserted, and a spring insertion hole is provided in the chip plate .

In the rotary valve according to claim 2 of the present application, at least one of the rotor plate and the holding plate is provided with a convex seal portion for preventing the powdery body from entering from the gap with the chip plate .

In the rotary valve according to claim 1, since the tip sliding portion that contacts at least the inner peripheral surface of the housing that partitions the inside of the housing is made of self-lubricating resin, the rotor can rotate smoothly and the amount of wear is reduced. be able to. And cost can be held down by using the minimum necessary self-lubricating resin. Further, even if the tip sliding portion bites the powdered material, the powdered material can be released without dragging due to its self-lubricating property, and the chip plate is less likely to be damaged. Further, since the chip plate is pressed against the inner peripheral surface of the housing by the urging means, the inside of the housing can always be partitioned while maintaining airtightness even if the chip plate is worn. Thereby, troublesome replacement work of the chip plate can be reduced, and the powdery material supplied from the supply port of the housing can be efficiently discharged from the discharge port of the housing without accumulating the powdery material inside the housing. it can.
In other words, this rotary valve can partition the inside of the housing with airtightness at all times, the rotor rotates smoothly, the chip plate is less worn and replaced, and it is relatively strong against the biting of powder. Will be good.

In the rotary valve according to the second aspect, in addition to the tip sliding portion of the chip plate, the side sliding portion contacting the rotor plate and the presser plate is made of self-lubricating resin. As a result, sliding between the tip plate and the rotor plate and the presser plate is smooth, and even if the powder material enters between the tip plate and the rotor plate and the presser plate and bites in, the tip plate is appropriately deformed. Since the bite is released, the chip plate can be moved in the radiation direction smoothly, and can be partitioned while maintaining the airtightness inside the housing. Moreover, the usage-amount of self-lubricating resin can be reduced and cost can be suppressed.
In other words, this rotary valve can partition the inside of the housing with airtightness at all times, the rotor rotates smoothly, the chip plate is less worn and replaced, and it is relatively strong against the biting of powder. Will be good.

In the rotary valve according to claim 3, the entire chip plate is made of self-lubricating resin. Thereby, a chip board can be integrally molded. Further, the rigidity of the chip plate becomes uniform, and even if a powdered material is caught, the chip plate is appropriately deformed in the rotation direction of the rotor plate, and the caught material is easily released. In addition, even if the powder material enters between the chip plate, the rotor plate, and the presser plate and bites, the bited material can be easily released, and the movement of the chip plate in the radial direction becomes smooth. It can be partitioned while maintaining the airtightness inside the housing.
In other words, this rotary valve can partition the inside of the housing with airtightness at all times, the rotor rotates smoothly, the chip plate is less worn and replaced, and it is relatively strong against the biting of powder. Will be good.

According to a fourth aspect of the present invention, at least one of the rotor plate and the presser plate is provided with a seal portion that prevents the powdery body from entering from the gap with the chip plate. This makes it difficult for the powdery material to enter between the tip plate and the rotor plate or the presser plate, ensuring smooth movement of the tip plate in the radial direction, and more reliably maintaining the airtightness inside the housing. be able to. Here, only one of the contact portion between the rotor plate and the tip plate and the contact portion between the retainer plate and the rotor plate may be provided with a seal portion that prevents the powdery material from entering. It is preferable to provide a seal part in both.
In other words, this rotary valve can partition the inside of the housing with airtightness at all times, the rotor rotates smoothly, the chip plate is less worn and replaced, and it is relatively strong against the biting of powder. Will be good.

Hereinafter, embodiments of a rotary valve according to the present invention will be described.
As shown in the sectional view of the rotary valve in FIG. 3, the inside of the housing 2 is partitioned from the rotary shaft 5 toward the inner peripheral surface of the housing 2 in the cylindrical housing 2 having the supply port 3 and the discharge port 4. The six rotor plates 6 are evenly provided radially. The tip plate 10 sandwiched between the rotor plate 6 and the presser plate 9 is guided so as to be movable only in the radiation direction, and the tip end portion of the tip plate 10 comes into contact with the inner peripheral surface of the housing to partition the inside of the housing 2 while maintaining airtightness. .

1 and 2 show a part of the internal structure of the rotary valve 1. In these drawings, only one rotor plate 6 is shown for explanation, but there are actually six rotor plates.
A steel rotor plate 6 is welded to the steel cylindrical rotary shaft 5, and the rotor plate 6 is provided with five large holes and five small holes, each of which is a screw hole. The number of rotor plates 6 is appropriately determined, but is preferably about 4 to 12. Further, the material of the rotor plate 6 is not limited to steel and is appropriately determined. Since the large hole and the small hole are also used for fixing the member, the shape, size, and number may be appropriately determined.

  The chip plate 10 has five notches 15, and a spring insertion hole 19 for inserting a spring is provided between them. The chip plate 10 is entirely made of a self-lubricating resin, and a polyamide resin, a polyacetal resin, a fluororesin, or the like can be used. In particular, a polyamide resin monomer cast nylon is preferable. The depth of the spring insertion hole 19 is preferably about half of the height of the chip plate 10, but can be determined as appropriate. Further, the size, shape, and number of the notches 15 may be determined as appropriate. In particular, it is preferable to provide two or more notches 15 in the width direction by center distribution, because the tip plate 10 can be prevented from being inclined obliquely in the movement in the radiation direction.

  The spring fixing plate 8 is made of steel, and five small holes corresponding to the small holes of the rotor plate 6 are provided. Six spring through shafts 20 are erected, and the spring 7 is inserted into the spring through shaft 20. . The length of the spring through shaft 20 must be determined in consideration of the depth of the spring insertion hole 19 of the chip plate 10, but this spring through shaft 20 also functions as a reinforcing core of the chip plate 10. By changing this length, the rigidity of the chip plate 10 can be adjusted. The material of the spring fixing plate 8, the diameter, length, and spring constant of the spring 7 can be determined as appropriate. In particular, with regard to the specifications of the spring 7, the rotor plate 6 rotates smoothly while maintaining airtightness. It is necessary to adjust and decide as follows.

Next, in the state of assembly, with the spring 7 inserted, the spring through shaft 20 is inserted into the spring insertion hole 19, and the tip plate 10 and the spring fixing plate 8 are attached to the rotor plate 6. The subsequent procedure is as follows.
First, the positions of the small holes of the spring fixing plate 8 and the rotor plate 6 are aligned, and the spring fixing plate 8 is fixed to the rotor plate 6 by the fixing screw 16. Next, the collar 18 is loosely fitted into the notch 15 of the chip plate 10, the fixing bolt 17 is inserted into the large hole of the presser plate 9, the collar 18, and the large hole of the rotor plate 6 and fastened with the nut 14. The chip plate 10 is sandwiched between the rotor plate 6 and the pressing plate 9, and the chip plate 10 is guided so as to be movable only in the radiation direction. By the guide function of the rotor plate 6, the holding plate 9, the fixing bolt 17, and the notch portion 15, the spring 7 inserted in the spring insertion hole 19 of the chip plate 10 does not receive unnecessary external force other than the radiation direction. The chip plate 10 can be reliably biased only in the radiation direction.
As shown in FIG. 2, the tip plate 10 can move only in the radiation direction, and the tip plate 10 is biased toward the inner peripheral surface of the housing 2 by the built-in spring 7. The tip sliding portion 11 is pressed against the inner peripheral surface of the housing 2 and can partition the inside of the housing 2 while maintaining airtightness.

Next, the movement of the rotary valve will be described with reference to FIGS. The tip plate 10 sandwiched between the rotor plate 6 and the presser plate 9 and movable only in the radiation direction by the fixing bolt 17 and the notch portion 15 of the tip plate 10 is urged by the built-in spring 7 to be the tip sliding portion. 11 is pressed against the inner peripheral surface of the housing 2, so that even if the chip plate 10 is worn, the inside of the housing 2 is always partitioned while maintaining airtightness.
Then, when the rotating shaft 5 is rotated by a driving device (not shown), the rotor plate 6 and the chip plate 10 are rotated, and the powdery material d supplied from the supply port 3 is filled in the partitioned space, and then the discharge port 4 is filled. The powdery body is discharged from.

  Since the airtightness is maintained by the chip plate 10, air does not leak due to the rotation of the rotor plate 6, and the smooth supply of the powdery material d is not hindered. That is, the powdery body d does not accumulate inside the housing 2 and can be discharged efficiently.

  Further, since the entire chip plate 10 is a self-lubricating resin, the rotor plate 6 rotates smoothly, and the wear and replacement frequency of the chip plate 10 can be reduced. Further, even if the tip sliding portion 11 of the chip plate 10 bites the powdery body d, since the friction is small, the powdery body d can be released without being dragged, and the chipboard 10 can be prevented from being damaged. When not only the powdery material d but also foreign matter is mixed and supplied, the foreign matter can be escaped without being dragged. Further, the chip plate 10 made of self-lubricating resin is easily deformed in the rotational direction even if an object is bitten, so that it is easy to miss the bite.

Since the chip plate 10 also slides with the rotor plate 6 and the presser plate 9, if the side sliding portion 12 of the chip plate 10 is made of a self-lubricating resin, the chip plate 10 moves smoothly in the radial direction, and the chip plate 10 Even if the powder material d enters between the rotor plate 6 and the presser plate 9 and bites it, it becomes easy to release the bitten material, and the biting of the material becomes relatively strong.
Thus, the maintenance burden can be reduced, and the frequency of the troublesome replacement work of the chip plate 10 can be reduced.

  In this embodiment, the urging means is the spring 7, but not limited to this, a leaf spring, an elastic body, or the like may be interposed.

  Further, as shown in FIG. 4, only the tip sliding portion 11 of the chip plate 10 can be made of self-lubricating resin, and other portions can be made of a material such as steel, so that cost can be reduced and the strength of the chip plate 10 can be improved. .

  As shown in FIG. 5, only the tip sliding portion 11 and the side sliding portion 12 of the chip plate 10 are made of a self-lubricating resin, so that the chip plate 10 can be smoothly moved and strong against biting. .

  A seal structure for preventing the powdery body from entering as shown in FIG. In this embodiment, in the rotor plate 6, the convex portion 13 is provided at a position in contact with the tip portion and the lower end portion of the chip plate 10. Also in the presser plate 9, the convex portion 13 is provided at the tip portion, a position in contact with the lower end portion of the chip plate 10, and a position in contact with the spring fixing plate 8. This structure makes it difficult for the powdery material d and the like to enter the side sliding portion 12 and the spring 7 built-in portion, ensuring smooth movement of the chip plate 10, maintaining the airtightness inside the housing 2, It can also be strong against biting.

  Further, as a modified example of this seal structure, as shown in FIG. 7, the spring fixing plate 8 and the holding plate 9 are integrated into one L-shaped component, and a convex portion 13 in contact with the chip plate 10 is appropriately provided. You can also

  The rotary valve according to the present invention can be used for discharging various powders in addition to dust, dust, and small dust, and can also be used for, for example, grain powders.

It is an assembly structure figure of the rotary valve concerning the present invention. FIG. 2 is an assembly completion diagram of FIG. 1. It is sectional drawing of the rotary valve which concerns on this invention. It is a partial enlarged view of the tip plate of the rotary valve according to the present invention. It is explanatory drawing which shows the modification of the chip | tip board of the rotary valve which concerns on this invention. It is explanatory drawing which shows the seal structure of the rotary valve which concerns on this invention. It is explanatory drawing which shows the modification of the seal structure of the rotary valve which concerns on this invention. It is sectional drawing of the conventional rotary valve. It is explanatory drawing which shows the process of a noncombustible waste.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary valve 2 Housing 3 Supply port 4 Discharge port 5 Rotating shaft 6 Rotor plate 7 Spring (biasing means)
8 Spring fixing plate 9 Presser plate 10 Chip plate 11 Tip sliding portion 12 Side sliding portion 13 Seal portion 14 Nut 15 Notch portion 16 Fixing screw 17 Fixing bolt 18 Collar 19 Spring insertion hole 20 Spring through shaft 25 Rubber member 30 Conveyor Belt 31 Crusher 33 Duct 34 Recovery device 35 Hopper

Claims (2)

A cylindrical housing having a supply port and the discharge port of the powdered material, a rotary shaft provided in the axial direction of the housing, wherein the direction from the rotation axis in the circumferential surface a housing so as to partition the interior of said housing radially a rotor plate and provided, further, be movable guide only in radial direction while being held between the rotor plate and the pressing plate, the tip sliding portion in contact with at least said housing inner peripheral surface is self-lubricating In a rotary valve provided with a chip plate made of a functional resin, a spring through shaft is erected on a spring fixing plate fixed to the rotor plate, a spring as an urging means is inserted through the spring through shaft, and A rotary valve characterized in that a spring insertion hole is provided in the tip plate . The rotary valve according to claim 1 , wherein at least one of the rotor plate and the presser plate is provided with a convex seal portion for preventing intrusion of the powdery body from the gap with the chip plate .

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