JPS6236501Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for adjusting the moisture content of sand before it is supplied to, for example, a mortar mixer.

Mortar is made by adding water and sand to cement in a fixed ratio and thoroughly kneading the mixture, and the quality of this mortar depends on the combination of the three materials: water, sand, and cement. For this reason, accuracy is required in the measurement of the three materials.

By the way, sand usually contains water, and since the water content is not uniform, when accurately weighing the sand mixed in the mortar as mentioned above, first, the water content of the sand must be uniform and at a specified amount. The method used is to adjust the moisture content and measure it after understanding the moisture content.

Conventionally, a device as shown in FIG. 1 has been developed as a device for adjusting the water content of water-containing sand.

This device transfers sand fed into a sand supply hopper 1 disposed at the center above the sand supply hopper 1 to a multi-layer plate-shaped impeller 2 disposed oppositely below the sand supply hopper 1.
The sand particles are dispersed at high speed by the rotation of the sand grains, and are made to collide with a tapered tubular shock plate 3 arranged around the impeller 2 and widened at the bottom, thereby separating and dehydrating the water adhering to the surface of the sand grains from the sand grains. Therefore, the water content is adjusted, and the sand grains that collide with the impact plate 3 are reflected by the reflective surface 3a of the impact plate 3 and fall onto the hopper 4 arranged below the impact plate 3. In addition, the moisture separated by the impact plate 3 is transmitted through the buttful ring 5 disposed below the impact plate 3.
The hopper 4 is separated by a separating wall 6 on the outer periphery of the hopper 4.
It is discharged into a discharge groove 7 provided around the periphery and isolated from the other.

However, in such a conventional device, the buttful ring 5 has a plurality of tapered tubular bodies stacked one on top of the other with the larger diameter side facing down and a gap provided between the lower and upper edges of each other. At the same time, the diameter of the upper edge circumference of the upper cylinder is formed to be smaller than the diameter of the lower edge circumference of the shock plate 3, and the upper edge circumference of the upper cylinder is provided with a gap between the lower edge circumference of the shock plate 3. The lower cylindrical body has a structure in which the lower periphery of the lower cylindrical body faces the upper part of the drainage groove 7 with a gap provided between the periphery of the lower cylindrical body and the periphery of the upper edge of the separating wall 6.

In such a structure, if the gaps formed between the impact plate 3, each cylindrical body, and the separation wall 6 are increased, the sand that collides with the lower edge of the impact plate 3 will be removed together with the separated moisture. Since sand is easily discharged into the discharge groove 7 and the amount of sand discharged into the discharge groove 7 (hereinafter referred to as sand loss amount) increases, a problem arises in that the yield decreases. On the other hand, if the gap is made smaller, the amount of sand loss will be reduced, but the problem arises that the moisture separated by the impact plate 3 will not be sufficiently discharged, making it impossible to accurately adjust the moisture content. .

This invention was made in consideration of the above-mentioned circumstances, and its purpose is to form the upper part of the buttful ring into a straight pipe shape and the lower part into a tapered pipe shape, so that it can be used as an impact plate. To provide a moisture content adjusting device which can accurately adjust the moisture content and has a good yield by reducing the loss of sand even if a gap is provided to sufficiently drain the moisture separated by sand.

This invention will be explained below based on an embodiment shown in FIG. Note that in this figure, parts common to those in FIG. 1 are denoted by the same numbers, and explanations thereof will be omitted.

In this figure, the reference numeral 10 indicates a buttful ring for draining water separated from the sand grains by the impact plate 3 into the drainage groove 7. This battle ring 10 includes an upper cylinder body 11 and an upper cylinder body 11.
and a lower cylindrical body 12 connected below. The upper cylindrical body 11 is formed in a straight tube shape, and its inner diameter is equal to the reflective surface 3a of the impact plate 3.
The inner diameter of the separating wall 6 is larger than the diameter of the lower edge of the partition wall 6 and smaller than the inner diameter of the separating wall 6. In addition, the lower cylinder body 1
2 has its upper edge circumference aligned with the lower edge circumference of the upper cylindrical body 11, and the diameter of its lower edge circumference is larger than the outer diameter of the separation wall 6.
The axis of the buttful ring 10 is aligned with the axis of the impeller 2, and the upper periphery of the upper cylinder 11 and the inner wall surface 13a of the cone-shaped cover 13 to which the impact plate 3 is attached are aligned. A gap 14 is formed between the lower cylindrical body 12 and the upper periphery of the separating wall 6, and a gap 15 is formed between the lower periphery of the lower cylindrical body 12 and the upper periphery of the separating wall 6. It is placed facing towards the top.

Note that the upper cylinder body 11 of the battle full ring 10
The width _W1 of the gap 14 formed between the upper edge circumference and the inner wall surface 13a of the cover 13 is the distance between the reflective surface 3a of the impact plate 3 and the inner wall surface 13a of the cover 13.
It is designed to be smaller than W ₂ .

Further, the cover 13 is tapered to the shock plate 3.
It is similar to the conventional one, and its lower edge periphery faces the upper part of the drainage groove 7.

In the device configured in this way, the sand grains that are scattered by the impeller 2 and are reflected when they hit the vicinity of the lower edge of the impact plate 3 collide with the upper cylinder 11 of the buttful ring 10 and are reflected. Therefore, it can be reliably dropped into the hopper 4 below. Therefore, even if the gap 15 between the lower cylindrical body 12 of the buttful ring 10 and the upper edge of the separating wall 6 is increased, the amount of sand loss can be extremely reduced, and the yield can be improved. .

In addition, the water extracted from the sand grains by the impact plate 3 is swept away toward the buttful ring 10 side by the wind pressure in the direction of the impact plate 3 generated when the impeller 2 scatters the sand, and sent to. The moisture sent to the lower edge of the impact plate 3 is blown off by the wind pressure and adheres to the inner wall surface 13a of the cover 13 and the surface of the upper cylinder 11 of the buff full ring 10. By the way, the width of the gap 15 formed between the lower cylindrical body 12 of the full ring 10 and the upper edge of the separation wall 6 can be determined independently of the amount of sand loss, so the width of this gap is set to be large. Therefore, the moisture adhering to the upper cylinder 11 can be transmitted through the lower cylinder 12 and sufficiently discharged. Incidentally, the sand grains adhering to the impact plate 3 along with the water are swept away together with the moisture towards the buttful ring 10 side and sent to the lower edge of the impact plate 3, and then when the impeller 2 scatters the sand together with the moisture. Because the impact plate is blown away by the wind pressure in three directions, the upper cylinder 11 of the full ring 10
The sand collides with the water, is reflected, and falls into the hopper 9. Therefore, the impact plate prevents the sand adhering to the water from being washed away by the water and falling into clumps. , the amount of sand loss can be reduced. In addition, the inner wall surface 13 of the cover 13
Moisture adhering to the cover 13 is removed by wind pressure.
and the upper cylindrical body 11. At this time, the width of this gap
Moisture that could not be completely discharged due to the small W ₁ is transmitted through the upper cylinder 11 and the lower cylinder 12 to the discharge groove 7.
is discharged. Therefore, since the water separated from the sand grains by the impact plate 3 can be sufficiently discharged, effects such as the ability to accurately adjust the water content are produced. In addition, in the present invention, the buttful ring 10, which is formed in the shape of a straight tube at the top and the shape of a tapered tube at the bottom, is disposed below the impact plate 3. Since the water content can be received by the upper cylindrical body 11 of the full ring 10, the water content can be adjusted more accurately.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a conventional sand water content regulating device, and FIG. 2 is a sectional view showing an embodiment of this invention. 3... Shock plate, 3a... Reflective surface, 6... Separation wall, 7... Exhaust groove, 10... Bat full ring, 1
DESCRIPTION OF SYMBOLS 1... Upper cylinder, 12... Lower cylinder, 15... Gap, 2... Impeller, 4... Hopper, 13... Cover, 13a... Inner wall surface, 14... Gap.

Claims (1)

[Scope of utility model registration request] Water-containing sand is scattered at high speed by the rotation of the impeller 2, and is made to collide with a tapered tubular shock plate 3 arranged around the impeller 2 with its downwardly widened side, thereby separating water from the sand grains and dewatering the sand. The sand grains are received by a hopper 4 placed below the impact plate 3, and the separated water is transmitted through a buttful ring 10 placed below the impact plate 3, and is placed around the hopper 4 and isolated. In the device for adjusting the moisture content of sand, which discharges the sand into a discharge groove 7 separated from the hopper 4 by a wall 6, the buffer ring 10 is connected to a straight tube-shaped upper cylinder 11 and below the upper cylinder 11. A tapered tubular lower cylinder body 12 that is continuous and widened at the bottom.
Moreover, the vertical full ring 10 has its axis aligned with the axis of the impeller 2, and furthermore, the upper periphery of the upper cylinder 11 and the inside of the cone-shaped cover 13 to which the impact plate 3 is attached. wall 1
3a, and a gap 15 is formed between the lower edge circumference of the lower cylinder 12 and the upper edge circumference of the separating wall 6. On the other hand, the upper cylinder 11 The inner diameter is larger than the diameter of the lower edge periphery of the reflecting surface 3a of the impact plate 3 and smaller than the diameter of the inner periphery of the separating wall 6, and the upper edge periphery of the reflecting surface 3a of the impact plate 3 The upper cylindrical body 12 is positioned above the extension line of the upper cylindrical body 11, and the lower cylindrical body 12 has its upper edge circumference coincident with the lower edge periphery of the upper cylindrical body 11, and its lower edge periphery is larger than the outer diameter of the separating wall 6. A sand water content adjusting device characterized in that it is formed in a large size and faces the upper part of the discharge groove 7.