JPS6238732Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention Industrial application field This invention is a method for processing water-containing granules such as gravel, crushed stone, sand, soil, or a mixture thereof without using any heating means such as drying. This invention relates to a dehydration basket of a dehydration device that mechanically separates solid and liquid for dehydration.

Prior Art The basic structure of this type of dewatering device is shown in Japanese Patent Publication No. 55-24029 filed by the present applicant. This dehydration device uses air introduced from one end of the water-containing granules put into a long cylindrical dehydration cylinder (pressure-feeding cylinder) to eject them from an opening at the other end (discharge port) and onto a rotating plate facing the discharge port. The granules and water are separated by collision, and the moisture is passed through a partition plate (solid-liquid separation plate) made of a wire mesh fixed around the rotating plate and discharged from the liquid chute, and the granules are separated from the solid chute. We are collecting more.

On the other hand, there has already been a device in which the solid-liquid separation function has been improved by forming the solid-liquid separation plate in the above-mentioned dehydration device into a cage shape that expands toward the above-mentioned discharge port side to create a dehydration cage that rotates integrally with the above-mentioned rotary plate. This was proposed in Utility Model Application Publication No. 58-3919 filed by the present applicant.

The problem that the invention aims to solve: The particles that collide with the rotating plate are bounced around all four sides,
It collides with the inner base of the wire mesh cage fixed on the outer periphery of the rotating plate, and is then subjected to a strong centrifugal action due to the rotation of the wire mesh cage, and while water is separated from the granules, the particles are transferred to the inner surface of the wire mesh cage. Move along the line toward the opening of the wire mesh cage. During the above series of operations, the inner base of the wire mesh basket is severely worn due to particles colliding with the inner base of the wire mesh basket. was being replaced.

B. Means for solving the structural problems of the invention A reinforcing plate made of a material resistant to abrasion is provided on the inner surface of the base of the dehydration basket, and the reinforcing plate catches the colliding particles and then spreads them outward. This is intended to improve the lifespan of the dehydration basket by transferring it to the continuous inner surface of the dehydration basket.

Hereinafter, the present invention will be described with reference to the illustrated embodiment.

In FIGS. 1 and 2, 1 is a casing, which is installed on a pedestal 2.

Reference numeral 3 denotes a cylindrical pressure-feeding tube inserted into the casing 1 from the side with approximately half of its total length in a horizontal state, and the outer end of this pressure-feeding tube 3 has an air outlet 3a connected to a blower (not shown). is opened, and a discharge port 3b is opened at the inner end thereof. In addition, slit plates 4 are installed diagonally on the lower surface of the pressure-feeding cylinder 3 at several locations inside and outside the casing 1, and below the slit plate 4 outside the casing 1, a first liquid chute 5 is arranged, A second liquid chute 6 is disposed below the slit plate 4 in the casing 1, and both liquid chute 5 and 6 join together outside the casing 1. Incidentally, instead of the slit plate 4, a notch may be simply provided. In addition, depending on the type of water-containing grains, such as when the water-containing grains are mainly composed of small particles such as sand or soil, the slit plate 4, notch, and first and second liquid chute 5, 6 may not be provided. You can. 7 is a hopper placed at the rear of the pressure-feeding tube 3;
The opening edge 7a extends to the vicinity of the center of the pressure-feeding cylinder 3 and is tilted toward the discharge port 3b so that the air flow velocity increases just before the position of dropping the water-containing particles. It's open. As shown in FIG. 12, the hopper 7 is located at the front of the pressure-feeding cylinder 3.
Additionally, it may be provided within the casing 1. Further, on the outer periphery of the discharge port 3b side of the pressure-feeding cylinder 3, there are fixedly installed a reflecting plate 9 which is spread out on a bumper toward the rotary plate 8 side, and a scattering prevention plate 10 located behind the reflecting plate 9.

As shown in FIG. 2, the rotating plate 8 has a discharge port 3b.
The flange portion 8a, the annular flange plate 11 that overlaps the back side of the flange portion 8a, and the bossed flange plate 13 fitted to the rotating shaft 12 are bolted together at several locations in the circumferential direction. 14, the motor (not shown) is fixed to the rotating shaft 12, and is connected to the motor (not shown) via a pulley 15 attached to the tip of the rotating shaft 12 that protrudes outside the casing 1.
It is configured to be rotationally driven by a drive device such as the following. 16 is a bearing case. In addition to the dish shape shown in the figure with a lower center, the rotary plate 8 may have other shapes such as a flat plate, a convex shape, a concave shape, or a conical shape depending on the properties of the water-containing particles and the operating conditions of the dehydrating device. It may be adopted depending on the situation.

17 is a dehydration basket that rotates integrally with the rotary plate 8;
It has a shape that expands toward the air outlet 3a side of the pressure-feeding cylinder 3 so as to have a predetermined distance from the outer peripheral ends of the reflection plate 9 and the scattering prevention plate 10, and is made of a solid material that cannot pass particles and only allows moisture to pass through. Basket body 1 with liquid separation function
8, a basket frame 19 that attaches and holds the basket frame 19, and a reinforcing plate 20 that covers the inner surface of the base. It is fixed to the rotating plate 8 by tightening the 20 mounting pieces 20a with bolts 21a and 21b, respectively.

As shown in FIG. 3A, the basket body 18 is composed of eight plate-like members 22 equally divided in the radial direction. As shown in FIG. 4, this plate-like member 22 has a mesh board 24 such as a wire mesh stretched over a peripheral frame 23, and the peripheral frame 23 has strips 23a with both sides protruding toward the back side. The L-shaped mounting pieces 25 are fixed to each of two places on the back side of the strip 23a by welding or the like. On the other hand, as shown in FIG.
26d are connected by eight vertical frame members 27, and each vertical frame member 27 has mounting pieces 28 fixed at two locations on the outer surface. The dewatering basket 17 is made of strips 23 of the plate-like member 22.
It is assembled by screwing each mounting piece 25 to the mounting piece 28 of the basket frame 19 in a state where they are in contact with each other.

5 and 6 show a second embodiment of the plate member 22. FIG. This plate-shaped member 22 has a large number of plate-shaped bars 29 arranged in parallel between the upper and lower frame portions 27a, 27b of the peripheral frame 27 and the intermediate frame 28, and the gap t between each bar 29 is subjected to dehydration treatment. It is adjusted to allow only moisture to pass through, not the granules. In FIG. 6, reference numeral 30 denotes a support rod installed between both side frame portions 27c of the peripheral frame 27, and each rod 29 is fixedly supported by welding or the like on the back side. 2
L-shaped mounting pieces 25 are fixed at these locations. still,
In addition to the flat plate shape shown in the figure, the bar 29 may have other shapes such as one with a narrower width on the back side, one with a pointed back side, or a substantially wedge-shaped cross section with a pointed back side. can. In addition, the bar 29 has
For example, wear-resistant mesh, high chromium cast iron, ceramic materials,
Use a material that is resistant to wear, such as a silicone lid.

FIG. 7 shows a third embodiment of the plate piece-like member 22, in which a large number of pores 31 are formed by punching a metal plate or the like.
Strips 32a and 32b protruding toward the back side are fixed to both sides and the middle part of the perforated plate 31 in which a is formed, and L-shaped mounting pieces 25 are fixed at two places each on the back side of both side strips 32a. It becomes. Pores 3 of this perforated plate 31
1a is set to a size that allows only the moisture of the water-containing particles to pass through. In this example, the plate piece member 22
The basket body 18 is formed using four plates.

FIG. 8 shows the divided pieces 33 constituting the reinforcing plate 20, A shows a perspective view from the back, B shows a perspective view from the front, and the reinforcing plate 20 shows the basket main body 17.
It is made up of divided pieces 33 divided in the radial direction so as to correspond to each of the plate-like members 22 constituting the plate. Each divided piece 33 has a substantially L-shaped cross section and both side portions 33
a is formed wide in order to improve stability when they come into contact with each other, and mounting pieces 20a are provided protruding from two locations on the bottom of the back side.

The water-containing granules discharged from the discharge port 3b of the pressure-feeding cylinder 3 collide with the rotary plate 8, are splashed around, and repeatedly collide with the reflector plate 9, causing the granules to be sent to the side of the dehydration basket 17. When moving, as shown in FIG. 9, after colliding with the corner portion 20' of the reinforcing plate 20, it moves along the inner surface of the dewatering basket 17 in the opening direction as shown by the arrow. By the way, the reinforcing plate 20 with which particles collide violently
Since the corner portion 20' is thick, there is sufficient wear allowance as shown by the dotted line, and the service life of the reinforcing plate 20 is long.As a result, the frequency of replacing the reinforcing plate can be extremely reduced.

FIG. 10 shows another embodiment of the reinforcing plate 20, in which a plurality of radial ribs 20c are formed at appropriate intervals from the corner part 20' of the reinforcing plate 20 to the middle part on the discharge end side.

When the reinforcing plate 20 shown in FIG.
While passing through the gap, the ribs force the particles to move in the same direction as the rotating direction of the rotary plate 8, and as a result, the speed difference between the particles and the reinforcing plate 20 is significantly reduced, and the Wear of the reinforcing plate 20 is suppressed as much as possible. The divided pieces 33 constituting the reinforcing plate 20 are made of a wear-resistant material such as wear-resistant steel, high chromium cast iron, ceramic material, or silicone cap.

In the above embodiment, the plate-shaped members 22 constituting the basket body 18 of the dehydration basket 17 are connected via the basket frame 19, but a simple ring material may be used instead of the basket frame 19. This is possible, and a structure in which the plate-shaped members 22 are directly connected to each other to form the dehydration basket 17 may be used. Furthermore, the dehydration basket 17 is
Not limited to the 4-division and 8-division exemplified above, but 2
It suffices if it is divided into the above plurality of parts, and the number of divisions is appropriately selected depending on the scale of the dehydration apparatus and the like.

In order to dehydrate the water-containing granules using such a dehydrator, the rotating plate 8 and the dehydrating basket 17 are rotated together, and air is fed from the hopper 7 into the pressure feeding cylinder 3 through the air outlet 3a at a predetermined flow rate. The water-containing granules are introduced into the pressure-feeding tube 3 and are forced-feeded to the discharge port 3b side by an air flow. A portion of the water liberated during this pumping process is discharged to the outside from the first and second liquid shoots 5 and 6 through the slits in the slit plate 4. Next, the water-containing particles ejected from the discharge port 3b collide with the rotating rotary plate 8, bounce back, collide with the reflecting plate 9, and collide with the rotary plate 8 again, and in the process of repeating this collision, the particles and water are are completely separated, and the particles gradually move toward the outer circumference through the gap between the reflection plate 9 and the dehydration basket 17, and are further guided to the inclined inner surface by the centrifugal force of the rotating rotary basket 17, and are removed from the rotary basket 17. Solid collection chamber 34 in the front casing 1
The water enters the solid chute 35 below and is recovered in a dehydrated state. Further, the water separated and scattered from the granules passes through the dehydration basket 17, enters the liquid collection chamber 36 on the back side thereof, and is discharged from the third liquid chute 37 below. Incidentally, when the particles repeatedly collide between the rotary plate 8 and the reflection plate 9 and move toward the dehydration basket 17, the particles strongly collide with the inner base of the dehydration basket 17, but the reinforcing plate 20 It has a function of accepting this and preventing the dehydration basket 17 from being damaged.

F. Effects of the invention In this invention, a reinforcing plate made of a wear-resistant material is provided at the inner base of the dehydration basket, so that the blown particles strongly collide with the reinforcing plate. The corners of this reinforcing plate are thicker than other parts and are made of wear-resistant material, so they have a long service life. Furthermore, since the reinforcing plate is attached to the inner base of the dewatering basket with bolts and nuts, the dehydrating basket can be used for a long time by replacing only the reinforcing plate.
Further, it is advantageous to manufacture, handle, etc. the reinforcing plate with a plurality of divided pieces, and in particular, the divided pieces are the only consumables.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of the entire dewatering device, Fig. 2 is a longitudinal cross-sectional view of the main parts thereof, Fig. 3 is an exploded perspective view of the dewatering basket, and Fig. 4 is a perspective view of the first embodiment of the plate-shaped member. figure,
FIG. 5 is a perspective view of the second embodiment of the plate-like member;
The figure is a cross-sectional view of the main part taken along the - line in Figure 5,
FIG. 7 is a perspective view of the third embodiment of the plate-like member;
Figures A and B are perspective views of the reinforcing plate, Figure 9 is an explanatory view showing the collision state of particles against the reinforcing plate, and Figure 10 is a perspective view of the reinforcing plate.
The figures and FIG. 11 show other embodiments of the reinforcing plate. FIG. 12 shows an embodiment in which the hopper is provided inside the casing. 3... Pressure feeding cylinder, 3a... Air blowing port, 3b... Discharge port, 8... Rotating plate, 17... Dehydration basket, 33... Division piece, 20... Reinforcement plate, 20'... Corner part.

Claims (1)

[Scope of utility model registration request] The water-containing granules introduced into the pressure-feeding cylinder from the hopper are ejected from the outlet at the other end by air flow introduced from the air outlet at one end of the pressure-feeding cylinder, and are placed at a position opposite to the outlet of the pressure-feeding cylinder. The solid-liquid separation occurs through a dewatering basket that is arranged around the rotary plate, rotates together with the rotary plate, and expands in a shape toward the pressure cylinder. In a dewatering device, a hopper that feeds water-containing granules into a pressure-feeding tube is open-connected to the pressure-feeding tube inside the casing,
A reflecting plate and a scattering prevention plate facing the rotary plate are provided at the tip of the pressure-feeding cylinder and a portion slightly rearward from the tip and located inside the dehydration basket, respectively, and the inner surface of the dehydration basket and the reflection plate are provided respectively. A dewatering device characterized in that a gap is formed between the periphery of the scattering prevention plate and the periphery of the scattering prevention plate.