JP2000177843A - Pneumatic carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic carrying device with a stable carrying capability that carries an object surely and quantitatively even if clay is attached to the object to be carried. SOLUTION: A pneumatic carrying device is structured such that a circumferential ejector 16 provided with a jet stream inlet mean 15 is connected to an outlet 14 for an object to be carried (gravel) from a hopper 13, an outlet pipe 18 for the object to be carried is connected the circumferential ejector 16, and the object to be carried is forcedly fed by the jet stream through a negative pressure area B formed in the circumferential ejector 16 by introducing the jet stream to the outlet of the outlet pipe 18. The pneumatic carrying device is provided with a screw conveyer 19 that forcedly carries out the object to be carried to the negative pressure area B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, the above-mentioned gravel used for forming a jagged structure used for seawalls and slabs, for example, by filling a net-like cylindrical body with inner gravel in an inner bag. For example, the present invention relates to a pneumatic transfer device for transferring aggregate, crushed stone, earth and sand, etc. for building materials.

[0002]

2. Description of the Related Art As one of the above-mentioned pneumatic conveying devices, a circular ejector device having a jet airflow introducing means is connected to an outlet of a conveyed object from a hopper device, and the conveyed object is connected to the circular ejector device. Are connected.

[0003] In such a pneumatic transfer device,
Although the specific structure will be apparent from an embodiment of the present invention described later, a negative pressure region is formed inside the circumferential ejector device by introducing a jet airflow from the circumferential direction to the circumferential ejector device, and the jet The air flow is drawn to the inner surface of the outlet pipe so as to increase the density by the so-called Coanda effect, and the conveyed material put into the hopper device is sucked into the negative pressure area of the circumferential ejector device, and then by the jet air flow, It is pressure-fed toward the discharge port of the outlet pipe.

[0004]

Conventionally, while a hopper device is provided with a vibrator, a conveyed material take-out port of the hopper device is arranged near the upper portion of the negative pressure area, and collapses from the take-out port due to vibration. The conveyed material was sucked into the negative pressure area, and was pumped to the discharge port of the outlet pipe by the jet airflow.However, the amount of conveyed material that collapsed from the outlet was uneven, and the negative pressure area It is difficult to reliably transport the conveyed material until the material is conveyed, and it is difficult for the conveyed material to collapse from the take-out port, especially if the conveyed material is wet or clay is attached. Become. In addition, a clay adhesion wall may be formed just before the negative pressure area, and transport may not be possible. For these reasons, there is a problem in that the variation in the transport amount becomes more remarkable and the transport capacity is greatly reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pneumatic transfer apparatus having a stable transfer capacity capable of quantitatively transferring any conveyed matter, such as clay adhered thereto. I have.

[0006]

The technical means adopted by the present invention to achieve the above object are as follows. That is, the present invention is characterized in that, in the above-described pneumatic transfer device, a screw conveyor for forcibly sending a transfer object to the negative pressure region is provided.

[0007] According to the above configuration, since the conveyed material is reliably and quantitatively introduced into the negative pressure region by the screw conveyor, even if the conveyed material has clay attached thereto, it can be quantified. According to the present invention, a pneumatic transfer device having a stable transfer capability can be provided, because the transfer can be pressure-fed to the discharge port of the outlet pipe.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a jagged structure 1 used for, for example, revetment or revetment, in which an inner bag 2 having one end closed is housed in a mesh tube 3 and a plurality of the mesh tubes 3 (in this embodiment). Are attached to the base cloth 4 at predetermined intervals, and the inner bag 2 is filled with the gravel 5 and the gravel filling port is closed.
In a mat shape.

Regarding the construction object and construction example of the above-mentioned mat-like structure 1, the present invention is based on the invention of Japanese Patent Application No. 9-33030, which has already been proposed by some of the present applicants.
Here, the description is omitted.

FIGS. 2 and 3 show an apparatus 6 for manufacturing the mat-like structure 1. The apparatus 6 includes an air-type conveying device 7 for filling gravel and a pallet 8 for conveying structural materials. The pneumatic transfer device 7 is configured as follows.

That is, the trolley 10 is movable along rails 9 in a direction perpendicular to the material conveying direction of the pallet 8.
As shown in FIGS. 4 and 5, the carriage 10 has a chute 1 with a vibrator 11 as shown in FIGS.
The hoppers 13 are provided with two hoppers 13 provided with the pallet 2 and the outlet 14 for the gravels (conveyances) 5 to be put into each hopper 13 is directed downward to the pallet 8 side. At the same time, circumferential ejector devices 16 and 16 each having a jet airflow introducing means 15 are connected to the gravel take-out port 14.

Then, a gravel discharge pipe 18 supported by a pipe receiving member 17 at the tip of the pallet 8 is connected to each of the circumferential ejectors 16, 16.
On the lower side of the hopper device 13, a screw conveyor 19 for forcibly sending the gravel 5 put into the hopper device 13 toward the circumferential ejector device 16 is arranged coaxially with the gravel discharge pipe 18. .

In the circumferential ejector device 16, an inner cylinder 20 containing the gravel sending end of the screw conveyor 19 is connected to the gravel take-out port 14 of the hopper device 13, and is provided around the outer periphery of the inner cylinder 20. The outer cylinder 22 is attached to the continuously provided flange 21, and the flange 24 having the cylindrical body 23 having substantially the same inner diameter as the inner cylinder 20 is formed so that a minute annular slit a is formed by the end of the inner cylinder 20. An annular air chamber A is formed by the inner tube 20, the outer tube 22, and the flanges 21 and 24 so as to be connected to the flange 25 of the outer tube 22.

On the other hand, the jet air flow introducing means 15
Is provided with air nozzles 26 at predetermined intervals in the circumferential direction of the outer cylinder 22, for example, at six equal parts, and connects an air supply line 28 from a compressor 27 to the air nozzle 2.
6, high-pressure air is introduced into the air chamber A, and the air is jetted out of the annular slit a into the gravel discharge pipe 18, and the air is jetted out of the inner cylinder 20 of the circumferential ejector device 16. A negative pressure region B is formed in the screw conveyor 19, and the gravel sending end of the screw conveyor 19 is inserted into the negative pressure region B.

According to the above configuration, even if the gravel 5 put into the hopper device 13 is wet or has clay or the like adhered thereto, it can be reliably and quantitatively determined by the screw conveyor 19. Circumferential ejector device 1
6 is sent to the negative pressure area B.

Accordingly, the gravel 5 sent out to the negative pressure area B by the screw conveyor 19 is successively passed through the negative pressure area B by suction by the negative pressure in addition to the forced conveyance by the conveyor 19, It is pumped toward the discharge port of the gravel discharge pipe 18 by a high-density jet stream attracted to the inner surface of the gravel discharge pipe 18 by the Coanda effect, and the delivery of the gravel 5 to the negative pressure area B is quantitative. Therefore, the gravel transfer capability of the pneumatic transfer device 7 becomes stable.

Mat-like structure 1 used for revetment or revetment
At the time of manufacturing, the inner bag 2 of the two net-like cylindrical bodies 3 attached to the base cloth 4 is set so as to cover the double gravel lead-out pipes 18, 18, received by the pallet 8, and The gravel 5 is sent into the inner bag 2 by the above-mentioned gravel transfer by the air-type transfer device 7, and the pallet 8 is moved backward at a speed corresponding to the filling amount of the gravel 5, and the gravel 5 is moved into the inner bag 2. By closing the gravel filling port at the stage of full filling, the jagged structure 1 is manufactured in a mat shape.

The material of the fabric of the inner bag 2 is preferably a material which is resistant to corrosion, has good air permeability, and is durable. For example, it is knitted with acrylic, polyvinylidene chloride, polyester, vinylon, nylon or the like. Fabrics can be used, but when plant seeds, rhizomes, etc. are mixed with gravel and the like and filled in the inner bag 2 for the purpose of planting greening,
Cellulose fibers such as cotton, or a mixture of these cellulose fibers and synthetic fibers mixed and woven is preferably used. By doing so, the growth of the plant is not inhibited.

The base cloth 4 is preferably made of a woven or non-woven fabric made of a durable fiber material such as nylon or polyester or a material coated with a durable resin, and has a thickness of 0.3 mm to 5 mm. Degree, also
The standard type is about 2 to 6 m in length and about 50 cm to 2 m in width, but the dimensions may be appropriately set according to construction conditions and the like, or may be formed in a grit mesh form. .

On the other hand, as a material of the mesh tubular body 3, a synthetic resin fiber material such as polyethylene, polypropylene, polyester, nylon, acrylic, vinylon, polyvinylidene chloride or the like is an appropriate material. For example, the diameter is 10 to 50 cmφ and the length is 2
As shown in the embodiment, two or more, for example, about six or eight net-like tubular bodies 3 are mounted on one base cloth 2 as shown in the embodiment, 1 is manufactured in a mat shape, but without manufacturing in a mat shape, the net-shaped tubular body 3 having the inner bag 2 therein is used alone.
Furthermore, the structure 1 may be made in a mere jagged shape by using the net-like cylindrical body 3 itself without the inner bag 2.

As the gravel 5 to be filled into the interior, a cobblestone having a diameter of 10 cm or less is usually used, but in consideration of workability, a cobblestone having a diameter of 20 to 70 mm is preferable. , Concrete waste, oyster shell, charcoal,
Recycled materials such as coarse organic matter such as coconut fiber and ceramics and glass fragments can also be suitably used.

[0022]

As described above, according to the pneumatic conveying apparatus of the present invention, the screw is conveyed to the negative pressure area of the circumferential ejector, so that the conveyed article becomes wet. Even if the clay is applied or the clay adheres, it can be reliably and quantitatively transported to the negative pressure region. Therefore, according to the present invention, an air-type transport device having a stable transport capability is provided. You.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mat-like structure taken out and enlarged in part.

FIG. 2 is a side view showing an apparatus for manufacturing a mat-like structure.

FIG. 3 is a plan view showing an apparatus for manufacturing a mat-like structure.

FIG. 4 is a sectional view showing a circumferential ejector device and a hopper device that form a negative pressure region.

FIG. 5 is an explanatory diagram of filling of gravel (conveyance) into an inner bag inside a mesh tubular body.

[Explanation of symbols]

2 ... inner bag, 3 ... net-like cylindrical body, 5 ... conveyed material (gravel), 13 ... hopper device, 14 ... gravel take-out port, 15 jet air flow introduction means, 16 ... circumferential ejector device, 18 ... conveyed product outlet pipe , 19: screw conveyor, B: negative pressure range.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Yai 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor 1 Suzuki 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu (72) Inventor Akira Higashi Akira 1-57 Shibaya, Suminoe-ku, Osaka-shi, Osaka Prefecture MEX Corporation (72) Inventor Masayuki Shima 1-1-57 Shibuya, Suminoe-ku, Osaka-shi, Japan Shares (72) Inventor Mitsio Taniguchi 590-1 Takao, Tsuyama City, Okayama Prefecture, Japan Nippon Vegetation Co., Ltd. (72) Inventor Yasuyoshi Fujishima 590-1, Takao Takao, Tsuyama City, Okayama Prefecture Nippon Vegetation Co., Ltd. F-term (reference) 2D018 CA02 3F047 AA04 AA12 BA02 CC06 CC13 3F075 AA07 BA01 BB01 CA02 CA04 CA09 CC05 CC09 CC15 CC19

Claims (2)

[Claims] A peripheral ejector provided with a means for introducing a jet stream is connected to an outlet of a conveyed product from a hopper device, and a conveyed product outlet pipe is connected to the circular ejector to connect the conveyed product to the conveyer; A pneumatic conveying device configured to pump an object by a jet airflow through a negative pressure region formed in a circumferential ejector device by introduction of a jet airflow to a discharge port of the outlet pipe, wherein the negative pressure region A pneumatic transfer device comprising a screw conveyor for forcibly sending a conveyed product. 2. The pneumatic conveying device according to claim 1, wherein the conveyed material is gravel that is filled in an inner bag inside a net-like tubular body to form a revetment or revetment structure.