JPH0721225Y2 - Silo carry-out device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a device for discharging sand, lightweight aggregate, etc. used as concrete aggregate from a stored silo.

[Prior art]

Sand, which is used as aggregate for concrete, is purchased with a limited amount of water that adheres to it and stored in silos until use. Then, when constructing concrete, it is carried out from a carry-out port provided at the bottom of the silo or the like using an appropriate carry-out device such as a vibration feeder.

[Problems to be solved by the device]

However, in recent years, the sand situation has been tight, and if the water content ratio is kept to the standard, the purchase cost becomes high and the delivery time is delayed. Therefore, the number of cases where the water content sand is unavoidably increased is increasing. For the above reasons, when sand having a high water content ratio is purchased and stored in the silo 2, the water adhering to the sand 3 settles to the bottom with the passage of time, and a quicksand phenomenon occurs, causing various inconveniences. That is, the carry-out port 21 for sand 3 provided at the bottom of the silo
An appropriate carry-out device (for example, a vibration feeder) 1 that can carry out by metering through the hopper skirt 22 and the like is provided below the, but the water that has settled to the bottom passes through the carry-out port 21 and the hopper skirt 22. Then, the sand 3 that has reached the chute 12 of the unloading device 1 and coexists with a large amount of water flows out as quicksand, so that the unloading device 1 cannot control the unloading amount at all. In addition, the sand 3 overflows from the carry-out device 1, the carry-out conveyor 4 and the like and becomes untransportable, or the sand flows backward on the feed conveyor (steep or vertical conveyor) to the batcher plant and becomes untransportable. Sometimes it becomes. Furthermore, even if the operation of the carry-out device 1 is completely stopped, if the carry-out port 21 is wide open, the sand 3 may flow out as quicksand to fill the carry-out device 1, the transport conveyor 4 and the like. . For this reason, as shown in FIG. 3, the purchased sand 3 is temporarily placed and drained sufficiently, and then stored in the silo 2, or a part of the sand 3 containing a large amount of water at the bottom is carried out, and It is re-introduced to prevent sand 3 from coexisting with a large amount of water locally, or when the unloading is interrupted, measures such as covering the unloading device 1 with a sheet 5 are taken. The method of placing and draining not only requires a large site, but also has the problem that manpower is required to re-insert it into the silo 2, and a part of the sand 3 containing a large amount of water at the bottom is carried out from above. Since the method of re-injection requires driving at night, enormous operating costs and personnel costs are required, and a significant cost increase cannot be avoided. Also, the method of placing the sheet 5 on the carry-out device 1 has a certain effect for a short time, but if it is restarted for a long time, a severe sediment transport phenomenon occurs and a large amount of sand 3 is carried out at once. It cannot be easily adopted because it falls onto the device 1. Therefore, even if sand with a high water content is thrown in as a stored object, the water that causes the quicksand phenomenon can be effectively removed, and the silo can be stably carried out. The devising of a delivery device was awaited.

[Means for Solving the Problems]

The present invention has been made in order to solve the above-mentioned problems of the prior art, and in a carry-out device arranged at a carry-out port below a silo, a water collecting sand is provided on a carrying bottom surface provided with a drain hole. A silo carry-out device characterized in that a mat is laid.

[Action]

The water brought into the silo by adhering to the material to be stored, such as sand, exudes with the passage of time and settles on the bottom of the silo, and reaches the side of the carry-out device via the carry-out port. Since a water collecting side mat is laid on the bottom surface for transportation of the device, the settled water is collected by the water collecting side mat without coexisting with sand near the bottom surface, and further provided on the bottom surface for transportation. It is drained from the drain hole. Therefore, even when sand having a high water content ratio is stored for a long period of time, the water content ratio is always maintained at an appropriate value, so that it can be stably carried out without causing a sedimentation phenomenon.

【Example】

Next, a detailed description will be given based on an illustrated embodiment of the present invention. The illustrated carrying-out device 1 according to the present invention is used so as to be communicated with the carrying-out port 21 provided on the bottom surface of the silo 2 through the hopper skirt 22.
For example, a chute 12 having an exciter 11 formed so as to obtain an optimum frequency, amplitude, inclination angle, etc. for conveying sand 3 and having a proper width and being inclined A water collecting sand mat 14 having a plurality of drain holes 13 on the bottom surface is also laid on the entire bottom surface. Then, a punching metal (for example, made of stainless steel) 15 is oscillatedly connected to the upper part of the water collecting sand mat 14 directly or via the bottom surface or the side surface of the chute 12 by the vibrating machine 11 to convey the sand 3. A surface is formed. The water collecting sand mat 14 does not exhibit the sedimentation phenomenon due to a special filtering function. Further, the other end of the water drain hole 13 is connected to a drainage pipe 131 so that natural drainage or forced drainage by a pump or the like is possible. The holes drilled in the punching metal 15 are 10 of the sand 3 to be stored.
If you set up about 50 to 50 times as large as the area ratio and put it in 5 to 30%, it will be less likely to be clogged and moreover the water can be effectively settled on the side of the sand mat 14 for collecting water. Moreover, the sand 3 can be stably transported. Instead of the punching metal 15, a woven fabric or a non-woven fabric that can easily permeate water, a thin film, or the like may be used, or the punching metal 15 may be used in combination. Further, the transfer means of the carry-out device 1 may be of a conveyor type or the like in addition to vibration, and the structure of the silo 2 and the structure of the conveyer conveyor 4 and the like arranged at the tip of the carry-out device 1 are well known. The thing can be used as it is. When the unloading device 1 is vibrating and carrying, it is said that if the supporting device is supported by the spring 16 below the silo 2 in a suspended state as shown in the embodiment, the vibrating force of the vibrator 11 is amplified and the carrying efficiency is improved. The advantage is added.

[Effect of device]

As described above, according to the present invention, the water brought into the silo by adhering to the material to be stored, such as sand, seeps out with the passage of time and settles on the bottom of the silo, and passes through the carry-out port. Although it reaches the unloading device, since a water collecting sand mat is laid on the bottom surface of the carrying out of the unloading device, all the exuded water is collected by the water collecting sand mat, and further from the drain hole. Be drained. For this reason, even if the sand is stored for a long period of time, the water content ratio of the sand on the carrier is always maintained at an appropriate value, so that the quicksand phenomenon can be completely prevented. In this way, even if sand with a high water content ratio can be carried out without any problem simply by disposing the carry-out device of the present invention at the carry-out port without modifying the conventional silo, it is possible to use it for draining. Temporary storage is no longer required, saving space and eliminating the need for re-movement, and cleaning the overflowing sand at the same time. Also, regardless of whether it is day or night, it is no longer necessary to carry out a part of the sand containing a large amount of water at the bottom and re-inject it from above, so it is possible to significantly reduce operating costs and personnel costs. It was Furthermore, since the water content is high, it is possible to reduce the cost by aggressively purchasing sand that can be purchased at a low price. Not only sand but also other lightweight aggregates are sprinkled as water to be stored from the upper side of the silo before use, so that the same remarkable effect as the sand described above can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention in section, and FIGS. 2 and 3 are explanatory views showing a conventional example. 1 ... unloading device, 11 ... exciter, 12 ... chute, 13 ...
… Drainage hole, 14 …… Sand mat for water collection, 15 …… Punching metal, 16 …… Spring, 2 …… Silo, 21 ……
Carry-out port, 22 ... Hopper skirt, 3 ... Sand, 4 ... Conveyor, 5 ... Sheet.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location // B01D 43/00 Z B28C 7/06 (72) Creator Kiji Miyake 2 Kyobashi, Chuo-ku, Tokyo Chome 16-1 Shimizu Construction Co., Ltd. (72) Inventor Hideaki Masuko 2-161-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Murata Atsumori 1-chome Kiyosumi, Koto-ku, Tokyo No. 7 Inside Asano Concrete Co., Ltd. (72) Inventor Kiyoyuki Tsunezawa 1-1-7 Kiyosumi, Koto-ku, Tokyo Inside Asano Concrete Co., Ltd. (72) Inventor Naoyuki Iyota 1-1-7 Kiyosumi, Koto-ku, Tokyo Issue Asano Concrete Co., Ltd. (56) References: Kaikaihei 1-66396 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A carry-out device arranged at a carry-out port below a silo, characterized in that a sand collecting sand mat is laid on a carrying bottom surface provided with a drain hole. .