JPS5815372Y2 - Powder transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer device for transferring powder or granular material in a substantially horizontal direction using a gas.

In the conventional so-called air slide type transfer device, a tensioned canvas cloth is attached to a transfer duct that is tilted downward in the transfer direction, and the space inside the duct is divided into two vertically into a transfer chamber. Has a structure.

Powder is thus supplied to the transfer chamber from the upper part of the transfer duct, and room temperature air is introduced into the air supply chamber.

The introduced air flows through the numerous ventilation holes of the canvas cloth and brings the powder on the canvas cloth into a state close to fluidization.

The powder is therefore moved by its own weight on the inclined canvas cloth and is discharged from the lower outlet end of the transfer duct.

For this reason, the transfer device is usually used in an atmosphere of 100° C. or lower because of the poor heat resistance of the canvas cloth, and cannot be used in a high temperature atmosphere.

A prior art technique that solves the above technical problem is a so-called grate-type clinker cooling device used in cement firing equipment.

A grate floor is constructed by arranging a large number of heat-resistant moving grates and fixed grates with a large number of ventilation holes in every KI row in the transfer direction.

The movable grate is connected to a drive device such as a hydraulic device for driving it back and forth along the transfer direction, and is cooled by cooling air flowing from below the grate upward through the ventilation holes.
The high-temperature granular material supplied onto the grate bed is cooled and transferred almost horizontally.

Other prior art uses conveyor belts.

High-temperature powder and granules are supplied onto a heat-resistant endless conveyor belt, and the drive drum that tensions the belt conveyor is driven by an electric motor or the like.

The above two prior art techniques involve mechanically transporting the powder and granular material, resulting in high operating costs, and use of drive devices with complicated structures, resulting in high manufacturing costs.

An object of the present invention is to provide an inexpensive transfer device that can transfer powder or granular material almost horizontally not only at room temperature but also in a high-temperature atmosphere.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a longitudinal section of a powder transfer device 1 according to an embodiment of the present invention.

A transfer duct 2 having a rectangular cross section and whose inner surface is lined with a refractory material is installed horizontally.

The transfer duct 2 includes an upper wall 2a extending horizontally in the transfer direction, that is, a direction from left to right in FIG. 1, two pairs of vertical side walls 2c facing each other in parallel along the transfer direction, and The side wall 2c includes end walls 2e and 2f that are vertically opposed to each other at both ends in the transfer direction, and a bottom wall 2b that extends diagonally upward from below in the transfer direction and is bent horizontally from the middle.

At the upper end of the transfer duct 2 in the transfer direction, a powder supply section 3 having a rectangular horizontal cross section and whose inner surface is lined with a refractory material is connected to the upper wall 2a.

A sloped wall 3a that guides the powder in the transfer direction is formed at the lower part of the powder supply section 3.

An air supply duct 4 having a rectangular horizontal cross section and whose inner surface is lined with a refractory material is connected to the lower portion l' of the upper end of the transfer duct 2 in the transfer direction.

An exhaust duct 5 extending vertically upward and having a rectangular horizontal cross section and whose inner surface is lined with a refractory material is connected to the upper part of the transfer duct 2 on the lower side in the transfer direction. Connected to the lower part is a powder discharge section 6 which extends vertically downward and has a rectangular horizontal cross section and whose inner surface is lined with a refractory material.

Inside the transfer duct 2, a stepped transfer grid floor 8 is installed.

The transfer grid floor 8 is formed by a blind plate-shaped grid 7 extending between both vertical side walls 2c of the transfer duct 20, formed in a rectangular shape, and having no ventilation holes.

The flat grid 7 is made of a heat-resistant material.

A large number of gratings 7 are arranged such that the lower grating 7 and the upper grating 7 in the transport direction
They are arranged in a stair-like manner, partially overlapping one another vertically along the transport direction, with one side facing down.

The upper end of each grid 7 in the transfer direction is fixed to a rotation shaft 10 made of a heat-resistant material and supported horizontally in the vertical side wall 2Cvc of the transfer duct 2, and thus in the width direction of the transfer duct 20.

The position of the rotation axis 10 of each grating 7 is selected so that equal vertical gaps 9 are created between each grating 7 when the grating 7 is in a substantially horizontal state.

FIG. 2 is a perspective view of the rotating means 1B that rotates the gratings 7 all at once and holds them at a predetermined angle of inclination.

On the lower surface of each grid 7, at intervals in the width direction (direction perpendicular to the transport direction), the base portions of support rods 11 made of a heat-resistant material are arranged.
The mounting side 13a of the support plate 13 made of triangular heat-resistant material [
Commonly fixed.

The support plate 13 is parallel to the vertical side wall 2cVr.

A rotation shaft 12 made of a heat-resistant material is fixed to the top of a triangle having the attachment side 13a as the base of the support plate 13, perpendicular to and horizontal to the transfer direction.

The rotation shaft 12 is pivotally supported by the vertical side wall 2c.

A rectifying plate 14 is fixed to the support plate 13, which is perpendicular to the support plate 13, extends vertically from below, and is smoothly curved in the middle to guide gas from below in the transfer direction.

The end of the pivot shaft 12 projecting outward from the transfer duct 2 is connected via a lever 15 to a cylinder 16 .

By operating the cylinder 16, the support plate 13 and therefore the support rod 11 are rotated as shown by the arrow 17 about the rotation shaft 12.

Thereby, the lattice IC is in contact with the tip of the support rod 11.
It rotates by one rotation of the automatic shaft 10.

The rotation shaft 12 is located further above the rotation shaft 11 in the transfer direction (i.e., on the left in FIG. That is, it is located below the lowermost rotation axis 110.

The powder supplied from the powder supply section 3 falls onto the transfer grid floor 8 and is deposited thereon.

The gas guided into the transfer duct 2 from the air supply duct 4 is
Passing through the gaps 9 between the grids 7 as indicated by the dashed arrow 19,
The powder is made to flow and float in the direction of transport.

The fluidized and suspended powder is transferred over the transfer grid bed 8 and discharged from the powder discharge section 6.

The gas is drawn and exhausted from the exhaust duct 5.

The flow of the gas guided through the air supply duct 4 is smoothly rectified from the vertical upward direction to the horizontal direction by the rectifying plates 14vc provided between the supporting plates 13, so that the gas flow is smoothly rectified from the vertically upward direction to the horizontal direction. The air gaps 9 [evenly distributed] between.

Note that the current plate 14 also plays a role of reinforcing the support plate 13.

FIG. 3 is a diagram for explaining the inclination angle of the grating 7. FIG.

The length -ytl, t2 from the axis of the rotating shaft 12 to the contact position 1 between one end of the support rod 11 and the grid 7 is shorter on the upper side in the transport direction and longer on the lower side (/, 1 x t2).

For this purpose, the grid 7 rotates as indicated by the arrow 20.

Rotation angle θ1 about rotation axis 10. θ2 becomes larger on the downstream side in the transport direction (θ1 × θ2).

That is, the gaps 9 between the grids 7 become smaller toward the downstream side in the transport direction, and the gas ventilation resistance becomes larger.

However, the powder that is dropped and supplied from the powder supply section 3 onto the transfer grid floor 8 is deposited in a mountain shape such that the center of the transfer grid floor 8 in the width direction is higher, and moreover, the powder is deposited on the upper side of the transfer grid floor 8 in the transfer direction. In this case, the powder layer is thick and the ventilation resistance is high.

The powder is transferred while gradually spreading in the width direction in the transfer direction, so the layer of powder becomes thinner on the lower side in the transfer direction.
Low ventilation resistance.

In this embodiment, the upper and lower gaps 9 are large where the layer thickness at the top in the transfer direction is small, and the gaps 9 are small where the layer thickness at the bottom is small, so that the ventilation resistance is approximately equal to that of the transfer grid floor 8 in the transfer direction. It becomes equal.

Therefore, the gas can flow uniformly through the gaps 9 of the transfer grid bed 8 in the transfer direction without blowing through partially, and the powder can be smoothly transferred over the entire length of the transfer grid bed 8.

In addition, since each grid 7 partially overlaps vertically at both ends along the transfer direction, powder falls from the gap 9 even when air is not supplied when the powder transfer device 1 is stopped. There's nothing to do.

FIG. 4 is an enlarged sectional view of the vicinity of the lower part of the powder supply section 3 of the powder transfer device 1 shown in FIG.

The partition plate 24 may be inserted into the inclined wall 3a of the powder supply section 3 from diagonally above the front in the transfer direction over the entire width of the powder supply section 3, passing through the inclined wall 3a of the powder supply section 3. .

The amount of powder supplied from the powder supply section 3 to the transfer grid floor 8 is limited by the partition plate 24 .

The powder spreads across the width of the transfer duct F20 in the gap 25 between the partition plate 24 and the grid T, and reaches the transfer grid floor Btrc.
It is supplied and deposited on the entire surface of the transfer grid bed 8, so that the layer thickness is uniform in the width direction.

When the powder supply amount fluctuates, the powder supply amount is adjusted by changing the insertion length t3 of the partition plate 24 and adjusting the gap 25, so that the powder is always spread over the entire surface of the transfer grid floor 8. can be left in a state where it is deposited with a uniform layer thickness.

This makes the gas ventilation resistance substantially uniform across the transport direction.

Therefore, in this embodiment, a phenomenon in which gas blows through near the skirts on both sides of the powder piled up in a mountain shape due to the absence of the partition plate 24, that is, near the vertical side wall 2c, can be prevented.

The partition plate 24 serves to maintain airtightness between the transfer duct 2 and the top of the powder supply section 3.

FIG. 5 is a longitudinal sectional view of a powder transfer device showing another embodiment of the present invention.

In this embodiment, the rotation shaft 10 of each grating 7 is fixed and pivotally supported at the lower front end of the grating 7 in the transport direction.

The rotation shaft 12 of the rotation means 18 is pivoted close to the bottom wall 2g.

FIG. 6 is a simplified plan view of a transfer grid bed showing yet another embodiment of the present invention.

Reference numeral 2c indicates the vertical side wall.

Each lattice 7 has three lattice portions 7a, 7b* in the width direction.
It is divided into 7c'.

Each grid section 7a, 7b, 7c is rotated by a separate rotation means.

By rotating these grating portions 7a, 7b, and 7c, the upper and lower gaps between the gratings 7 through which the gas passes can be increased by increasing the thick part (the central part in the width direction) of the powder layer. Make the thinner parts (both sides in the width direction) smaller.

This makes it possible to reliably prevent gas from blowing through the thin part of the powder layer.

The division of each grid 7 is not limited to three, but may be divided into more than three.

FIG. 7 is a perspective view of a transfer grid floor showing another embodiment of the present invention.

In the embodiment of FIG. 1, shielding plates 21 are attached to both sides of the front end of each grid 7 in the transport direction, extending downward perpendicularly to the grid 7 and having a length shorter than the gap between the grids 7.

The shielding plate 21 is made of a heat-resistant material.

The shielding plates 21 extend from both ends of the grid 7 toward the center in the width direction of the transfer grid floor, and are attached so as to form a gap 22 in the center.

The shielding plate 21 for each grid 7 is formed so that the length of the gap 220 in the width direction becomes wider toward the bottom in the transport direction, and the width of the shielding plate 21 becomes shorter.

As mentioned above, the powder supplied to the transfer grid bed is deposited in a thick layer at the center in the width direction of the transfer grid bed, resulting in poor ventilation resistance.
The powder layer becomes thinner toward both sides, and the ventilation resistance becomes smaller.

In this embodiment, a gap 22 is provided at the center where the ventilation resistance is high, so that gas can easily flow to the area shown by the arrow 23, and the powder is fluidized.

However, in areas where the powder deposit layer is thin on both sides of the transfer grid bed, the amount of gas flowing is small due to the shielding plate 21.
There is no gas leak here.

FIG. 8 is a simplified cross-sectional view of a rotating means 26 according to another embodiment of the present invention, which replaces the aforementioned rotating means 18.

Below each grid T [IF the upper end of each support rod 27 comes into contact.

Each support rod 27 extends downward and has a horizontal fixing pin 2 in the middle.
It is supported by 8.

The lower end of the support rod 27 is connected to a horizontally extending drive link 29 by a connecting pin 30.

The fixed pin 28 is above VC6, and the distance between the fixed pin 28 and the connecting pin 30 is equal.

The distance from the axis of the fixing pin 28 of the support rod 27 to the upper end 1 of the support rod 2T becomes shorter as it moves further down in the transport direction.

The drive link 29 is connected to a reciprocating drive provided outside the transfer duct 2 in FIG.

When the drive link 29 moves back and forth along the transfer direction as indicated by the arrow 31, the support rod 2T rotates as indicated by the arrow 32 around the fixed pin 28.

As a result, the grating 7 rotates around the rotation shaft 10 as indicated by the arrow 33, and the gap in the vertical direction of the gap 9 can be adjusted in the same way as in the previous embodiment.

FIG. 9 is a simplified sectional view of the rotating means 34 of yet another embodiment of the present invention.

In this embodiment, a pivoting means 34 similar to the pivoting means 26 shown in FIG. 8 is provided above the grid 7.

Each support rod 37 is connected to a horizontally extending drive link 35 by a connecting pin 36, is pivoted by a fixed pin 38, extends downward, and is mounted within a sliding frame 39 fixed to the upper surface of each grid 7. They are each locked in a movable manner.

When the drive link 35 is moved back and forth in the transfer direction in the same way as in the embodiment shown in FIG. Instead, it rotates, causing the grid 7 to rotate.

The lengths between the lower ends of the support rods 37 and the axes of the fixing pins 38 are mutually different, and the lower ends of the support rods 37 can be slidably displaced back and forth in the transfer direction to each grid 7 as described above. By the rotation of the support rod 3T, each grating 7 is angularly displaced such that the rotation angle of each grating 7 becomes larger on the downstream side in the transport direction.

In each of the embodiments shown in FIGS. 4 to 9 described above, all the structures other than those shown in the figures are the same as those shown in FIG. 1.

The object to be transported may be not only powder but also granules as long as it can be fluidized by gas, and may or may not be at a high temperature.

Instead of high-temperature gas, room-temperature gas may be used as the transfer medium.

The drive device connected to the four-wheel drive means may be replaced by a hydraulic device, such as another drive device such as an electric motor.

As described above, according to the present invention, the lattices are stacked one on top of the other in a transfer device so that there are vertical gaps between the lattices, and are arranged in the form of steps in the direction of transfer, thereby forming a transfer lattice floor. By causing gas to flow through the gaps, the powder and granules in the transfer grid bed can be fluidized and suspended in a substantially horizontal direction.

Therefore, maintenance is easy because there are no mechanically driven parts for transport.

Since adjacent grids are partially stacked one on top of the other, powder and granules will not fall downward from the grid even when air is not being supplied during suspension of operation.

Further, in the present invention, a rotating means 18 for angularly displacing each grating 7;
26.34 has a support rod 11.27.37 which is angularly displaceable about an axis extending horizontally in the width direction of the transfer duct 2, and one end of this support rod 11.27.37 is attached to each grid 7 in the transfer direction. The other end of each support rod 11.27.37 is interlocked with the drive means 1.
5.16, 29.35, said one end of the support rod 11.27.37 and its support rod 11.27.
The lengths -ytl, t2 of the gratings 7 with respect to the rotation axis are different from each other, so that the rotation angle θ1 . Since each grid T is angularly displaced so that θ2 is larger on the lower side in the transfer direction, the ventilation resistance is approximately equal from the upper side to the lower side in the transfer direction.

Therefore, the gas does not blow through partially, and the powder and granules can be transferred smoothly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the powder transfer device 1 according to the embodiment of the present invention, FIG. 2 is an enlarged perspective view of the driving means 18 of the embodiment of FIG. 1, and FIG. 3 illustrates the inclination angle of the grating 7. 4 is an enlarged sectional view of the vicinity of the lower part of the powder supply section 3 of the powder transfer device 1, and FIG. 5 is a longitudinal sectional view of the powder transfer device of another embodiment of the present invention. FIG. 6 is a simplified plan view of a transfer grid floor according to still another embodiment of the present invention, FIG. 7 is a perspective view of a transfer grid floor according to still another embodiment of the present invention, and FIGS. FIG. 2 is a simplified cross-sectional view of a rotating means 26°340 of still another embodiment of the present invention fF); 1...Powder transfer device, 2...Transfer duct 2a...
Upper wall, 2b, 2g... Bottom wall, 2c... Vertical side wall, 2e, 2f... End wall, 3... Powder supply section, 3a
... Inclined wall, 4 ... Air supply duct, 5 ... Exhaust duct, 6 ... Powder discharge section, 7 ... Grid, 8 ... Transfer grid floor, 9 ... Gap, 10.12...Rotation axis, 11
．． 27... Support rod, 13... Support plate, 14... Rectifying plate, 15... Lever, 16... Cylinder, 18.
26.34... Rotating means, 21... Shielding plate, 24.
・Upper side plate, 28.38...Fixing pin, 29.35...
・Drive link, 30.36...Connecting pin, 37...
Support rod, 39...Sliding frame.

Claims (1)

[Claims for Utility Model Registration] (I) A large number of gratings 7 extending between the vertical side walls 20 of the transfer duct 20 are arranged in the transfer duct 2 installed horizontally in a stepwise manner downward in the transfer direction. lattice T adjacent to each other in the front and back in the transport direction.
are arranged so as to be angularly displaceable about the rotational axis extending horizontally in the width direction of the transfer duct 2, at intervals above and below the grids 7, and partially stacked on top and bottom of the grids 7. The rotating means 1B, 26.34 has an axis extending horizontally in the width direction of the transfer duct 2! Instead, the support rod 11 can be angularly displaced.
27.37, one end of each support bar 11, 27.37 is slidable back and forth in the transfer direction to support each grid 7, and the other end of each support bar 11, 27.37 is The ends are interlocked and driven in unison by drive means 15.16, 29.35, and the length g/ ! , 1.
t2 are different from each other, and the rotation angle θ1 . Each grid 7 is angularly displaced so that θ2 becomes larger on the downstream side in the transport direction, and gas is guided from below the grid 7 to fluidize or float the powder on the grid γ. A device for transferring powder and granular materials. (2) Each lattice T has a plurality of lattice portions 7a in the width direction. 7b, 7clC are divided, and each of these lattice parts 7a,
The rotating means 18, 2 are arranged so that the upper and lower gaps between the rotating means 18 and 7c are large at the center in the width direction and small at both sides in the width direction.
6.34 [So the lattice part? The apparatus for transferring powder or granular material according to claim 1, characterized in that the parts a, 7b, and 7c are rotated. 0) On both sides of the front end of each grating 1 in the transport direction, shielding plates 21 are attached that extend vertically downward of the gratings 7 and are shorter than the gap between the gratings I. The powder or granular material transfer device according to claim 1, wherein the width of the powder or granular material transfer device is formed such that the width becomes shorter from the top to the bottom in the transfer direction.