JP2001153554A - Drying device for sand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dry wet sand, used for the material of an experiment, quickly and cleanly by a simple device. SOLUTION: The inside of a cylindrical body is partitioned into upper and lower parts by a sieve body 4 and a device 5 for supplying dry air into the lower cylindrical body 2, partitioned by the sieve body 4, is provided on the outer wall of the lower cylindrical body 2 whereby the dry air A is dispersed to the outside of the drying device from the upper cylindrical body 3 through the sieve body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying sand used in a soil test or a ground model test.

[0002]

2. Description of the Related Art Generally, sand used in tests such as a soil test and a ground model test needs to be dried immediately after the completion of the test in preparation for the next test. As such a drying device,
Conventionally, there are a drying device including a burner device and a rotary drum for storing sand, and a drying furnace including a closed heat insulating chamber and a burner.

[0003]

However, in order to dry a small amount of sand used in an experimental facility, there is a problem that the facility of the apparatus becomes too large. on the other hand,
Although natural drying does not require equipment, it takes too much time for drying and is susceptible to the weather, and has a problem that the drying process becomes unstable.

Further, in the case of hot air drying, if sand is baked at a high temperature, its physical properties change, so that there is a problem that it is unsuitable as an experimental material. In a drying furnace using a flame burner, soot may adhere to and mix with sand. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to quickly and cleanly dry used wet sand as a test material with a simple apparatus.

[0005]

According to a first aspect of the present invention, there is provided a sand drying apparatus, wherein the inside of a cylindrical body is vertically divided by a sieve body, and dried into a lower cylindrical body partitioned by the sieve body. A device for supplying air for use is connected to the outer wall of the lower cylinder so that dry air is radiated outside from the upper cylinder through the sieve.

Therefore, the wet sand put on the sieve body in the upper cylinder is dried by the drying air passing through the sieve body,
On the other hand, the dried sand falls from the sieve from below and accumulates on the lower cylindrical body. Therefore, the wet sand is dried automatically and quickly. The dry air refers to air provided with conditions for quickly drying wet sand, and heated air having a temperature at which sand is not baked by hot air or hot air is preferably used.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a sand drying apparatus according to the present invention will be described. FIG. 1 is a sectional view of a sand drying apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view. The sand drying device 1 of the present invention, as shown in FIG.
It comprises a lower cylinder 2 and an upper cylinder 3 which can be connected vertically, and a sieve 4 is interposed between the upper and lower cylinders 2, 3.

That is, an outer peripheral frame 4a is provided around the sieve body 4 so as to be fitted to one of the upper and lower cylindrical bodies 2 and 3 (in the illustrated example, the upper cylindrical body 3). Can be connected vertically by fitting the sieve body 4. In addition, a ring 3a is provided on the upper edge of the upper tubular body for engaging the hanging rope 10. An opening 2a is formed in a side surface of the lower cylindrical body 2, and the opening 2a is provided with a heating device (not shown) such as an oil burner, a gas burner or an electric heater and a blower fan (not shown). The drying air supply device 5 is connected, and the blown-out hot air to hot air A can be radiated from the upper cylindrical body 3 to the outside through the wet sand 6 through the sieve body 4.

The opening 2a is provided at a position as high as possible so as not to be blocked by the sand deposited on the lower cylindrical body 2. Further, the lower cylinder 2 may be either a bottomed body having an integrated bottom or a bottomless bottom, but in the case of no bottom, the lower cylinder 2 is placed on the base plate 7. In addition, this base plate 7
It is desirable to attach wheels 8 and 8. This is because the movement of the sand drying device 1 becomes free by the wheels 8, 8 and the like, and only the obtained dried sand can be easily transported.

[0010] As shown in the figure, an edge plate 7 is provided around the base plate 7.
It is desirable to provide a and 7a. This is for preventing the obtained dried sand from falling and facilitating storage and transportation of the sand. Next, the operation of the sand drying apparatus 1 will be described. The lower cylinder 2 is placed on the base plate 7 and the upper cylinder 3 is connected with the sieve 4 interposed therebetween. Next, the air outlet 5a of the hot air inlet device 5 is attached to the opening 2a on the side surface of the lower cylindrical body 2.

In this state, wet sand 6 is put into upper cylindrical body 3. Since the wet sand 6 is agglomerated by the moisture, the wet sand 6 is not shaken even when thrown onto the sieve body 4 without being shaken.
Deposit remains on the top. Next, the hot air feeding device 5 is driven to send hot air into the lower cylindrical body 2. The lower cylindrical body 2 is closed with a base plate 7 at the lower part and a wet sand 6 at the upper part, so that the inside is pressurized. As a result, the hot air A is sieved as shown by an arrow in FIG. It passes through the deposited wet sand 6 on the upper part 4 and diffuses from the upper cylindrical body 3 to the outside.

[0012] With this dissipation, the water in the sand evaporates. In addition, since the wet sand 6 is positively dried by the passing drying air, the drying efficiency is high, and therefore the drying can be performed sufficiently quickly even at a low temperature. Therefore, the sand particles do not seize due to heat and are not denatured. Further, the drying of the wet sand 6 starts from the portion in contact with the sieve body 4 and the cohesive force of the sand particles is reduced from this portion.

Although a certain degree of vibration is required for smoothly dropping the dry sand particles from the sieve body 4, it occurs during combustion when hot air is generated by the drying air supply device 5 attached to the lower cylinder 2. Since the vibration is transmitted to the sieve body 4, this becomes the vibration force of the falling of the dry sand particles. Therefore, in the case of the standard sand, which hardly loses cohesion when dried, a vibrator or the like is not particularly necessary, but a vibrator (not shown) is attached to the sieve body 4 depending on the soil quality, and the vibrator is actively used. It can also be screened off.

As shown in FIG. 2, a lower cylinder 2 and an upper cylinder 3 each having a diameter of 1 m, a height of 1 m, and circumferentially extending reinforcing ribs 2R, 3R on the outer periphery are formed of a metal plate. A 4-mesh sieve was prepared as the sieve body 4 sandwiched between these cylindrical bodies. The mounting portion 4a of the sieve body 4 is formed in a flange shape so as to be sandwiched between the flange-shaped reinforcing ribs 3c and 2c of the upper and lower cylindrical bodies 2 and 3, and the short cylindrical portion 4b fitted to the lower cylindrical body 2 on the inner surface. Was integrally formed.

Then, the base plate 7 was placed on the carriage 9, the lower cylindrical body 2 was mounted thereon, and the sieve body 4 and the upper cylindrical body 3 were overlapped and joined in this order. Next, a hot gun having a capacity of 150 MJ / h (36280 kcal / h) driven by gasoline, kerosene or the like was attached to the side opening 2a of the lower cylindrical body 2 as a drying air supply device 5. Moisture content 1 as test data
0.35 m ³ of 0% Toyoura standard sand was charged into the upper cylindrical body 3 by a belt conveyor (not shown), deposited on the sieve body 4, and the hot gun was driven.

As a result, the sand starts to fall from the sieve body 4 onto the base plate 7 at the bottom of the lower cylinder 2 in order from the dried sand, and after 8 hours, the entire amount of the sand is reduced without causing deterioration due to heat.
Dropped and deposited in the dry state.

[0017]

As described above, the sand drying apparatus of the present invention has good drying efficiency because hot air is forced to pass through the sand grains, so that it can be dried quickly without having to make the temperature very high. Further, since it is not necessary to make the temperature of the hot air so high, the heat energy to be consumed is small and the sand can be dried without fear of deterioration of the sand due to heat.

Further, the drying device itself is composed of members having a simple structure such as an upper and lower cylindrical container, a sieve, and a hot-air feeding device, so that it can be manufactured at low cost and has an effect of being easily prepared.

[Brief description of the drawings]

FIG. 1 is a sectional view of a sand drying apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the sand drying device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sand drying device 2 Lower cylinder 3 Upper cylinder 4 Sieve 5 Drying air supply device 6 Wet sand 7 Base plate

Continued on the front page (72) Inventor Toshinori Kawabata 1-3-1 Nihombashi Muromachi, Chuo-ku, Tokyo Kubota Tokyo Head Office F-term (reference) 3L113 AA01 AB03 AC73 BA02 DA02 DA06

Claims (1)

[Claims] 1. The inside of a cylindrical body is vertically divided by a sieve body, and a device for supplying drying air to a lower cylindrical body partitioned by the sieve body is connected to the lower cylindrical body outer wall, and the drying air is supplied to the lower cylindrical body. A sand drying device that is radiated to the outside from the upper cylinder through the sieve.