JPH1135155A - Powder vacuum transfer method and cement conveying method using former method in manufacture of concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with costs for installation of silo equipment and the like and to easily and efficiently transfer cement from a proper capacity of bag of cement installed in a construction field for producing concrete required for the construction so as to improve construction efficiency. SOLUTION: In this method, a flexible tube 2 is used for conveying powder from a powder storing part to a required position, and the inside of the flexible tube 2 is kept in a vacuum condition so that the powder is sucked and conveyed with air, and subsequently, the powder is taken out to the required position after the air is separated from it. For example, in production of concrete and the like, cement and air are sucked and conveyed into a tank 3 together by using the flexible tube 2, whose inside is kept in a vacuum condition, from a cement container 1 of a required capacity, and in the tank 3, the air is separated while cement is accumulated into a hopper part 5 beneath the tank 3. Then, a predetermined quantity of cement is taken out from the hopper lower outlet so as to be mixed with aggregate such as water, sand, and ballast.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring powder such as cement powder in the production of concrete, mortar and the like, and more particularly to the above-mentioned method using a flexible tube whose inside is kept under negative pressure. It relates to a transfer method.

[0002]

2. Description of the Related Art Conventionally, in the production of concrete, mortar, and the like, a silo is installed industrially and a large-scale kneading operation is performed.
Construction including waterproofing is underway. On the other hand, at the construction site, when trying to obtain concrete or the like, conventionally, cement was put into a mixer from a small-capacity 25 kg bag cement using human power, kneaded and used for construction work.

[0003] Originally, pneumatic transportation using pressurized air as a transportation method is conventionally known and widely used, but is often used for the transfer of powder such as the transfer of cement in the production of concrete, mortar and the like. Not.

[0004]

However, the conventional industrial concrete production as described above requires large-scale facilities such as silo facilities, and is not suitable for use of relatively small-volume concrete on site.

On the other hand, it is very inefficient to lift 25 kg of bag cement by hand at the site and put the cement into a mixer. However, conventional pneumatic transport is generally a pressurized air pumping method, and powder transfer by such pumping causes the powder to be scattered, which may adversely affect the surrounding environment. . Of course, in the case of pneumatic transportation, there is also a method of transporting articles by suction. However, this method is not used for transporting articles that are easily scattered such as powder only by transferring the articles from a specific position to a specific position.

The present invention addresses the various situations described above,
In particular, to provide a method suitable for making concrete by mixing cement packed in a ton bag known as a flexible container pack or the like, which is rarely used in the past, with water, sand, gravel, etc. at a construction site. The purpose is to eliminate the costs of conventional silo equipment, install a moderate amount of bag cement at the construction site, make concrete necessary for construction simply and efficiently, and improve construction efficiency It is.

[0007]

That is, according to the present invention, which meets the above-mentioned object, a flexible tube is first used as a basic powder transferring means for transferring powder from a powder storage section to a required location. It is characterized in that the powder is sucked and conveyed together with air while keeping the inside of the tube under a negative pressure, and then the air is separated and the powder is taken out to a required location.

[0008] A second aspect of the present invention relates to a concrete method using the powder transfer, for manufacturing concrete or the like. Suction transport into the tank, separate the air in the tank, accumulate the cement in the hopper below the tank, then take out a certain amount from the lower outlet of the hopper and mix it with aggregate such as water, sand, gravel, etc. It is characterized by the following. Note that the above method is effective for directly transferring concrete from a bag cement of an appropriate capacity and directly producing concrete and mortar at a construction site such as wall coating and waterproofing.

[0009]

When the above transfer method is used, in the production of concrete or the like, cement is taken out from a bag cement containing an appropriate volume, usually more than a conventional 25 kg bag cement, usually from a ton bag called a cerecon pack, and mixed on site. It is advantageous for making concrete and mortar. In this case, since a flexible tube is used to suction the inside of the container under a negative pressure, the transfer operation is smooth, the powder is not scattered, and the air is separated and only the powder is taken out. Accumulates smoothly.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described.

As described above, the present invention is based on the principle that a flexible tube is used, the inside of the powder is suctioned and conveyed under a negative pressure, and then the air is separated and discharged. As the flexible tube, a known flexible tube for suction having a helical inner wall surface is used, and an appropriate tube diameter is appropriately selected depending on a use condition.
However, if the tube diameter is too large, the suction capacity will be affected.
The internal negative pressure is related to the specific gravity of the powder to be conveyed, such as cement powder, and a negative pressure of 2000 mmHg is generally used. FIG. 1 shows an apparatus for producing concrete or mortar using the above-described negative pressure conveyance, and is made to have a size that can be arranged at a construction site.

In the figure, (1) is a cement container, generally a bag containing cement.
A ton bag having a moderately large capacity as compared with a 25 kg bag cement used for cement mixing on site, that is, a bag cement called a flexible container pack is used.

(2) A flexible tube for sucking and transporting cement into a tank (3) mounted on an underframe movable from the container (1), which is a synthetic resin having a known helical core. A flexible tube is used, and the outer wall has a spiral shape and the inner wall has a smooth shape. The inside of the flexible tube (2) communicates with the tank (3) to be in a suction negative pressure state, sucks the cement in the container (1), and introduces the cement together with air into the tank (3). Filter provided in 3) (4)
As a result, the cement and air are separated from each other, and the air is sucked and discharged, while the cement falls and accumulates in a hopper section (5) below the tank (3).

Although the negative pressure in the tank (3) and the flexible tube (2) is not shown, it is connected to an intake source as appropriate.
It is maintained at a negative pressure by known equipment. The degree of the negative pressure may be any as long as the cement can be suctioned and conveyed, and varies depending on the specific gravity of the powder. However, about 2000 mmHg is appropriate. In addition, (6) in the figure is an air pulse for removing cement separated by the filter (4).

The cement dropped into the hopper section (5) is provided with a fixed amount supply means in the hopper section (5), and is operated by an appropriate sensor, and the cement is supplied to a predetermined amount in the lower mixer (7). And mix with water, sand, and aggregates such as gravel to make concrete or mortar. Through this tank (1), the lower hopper (5)
Known devices can be used for the device itself for guiding the cement into the mixer (7) and producing concrete or mortar. In addition, the tank (3) and the mixer (7) are arranged at the construction site of wall painting or waterproofing construction,
By placing a ton-bag cement bag (1) on the same site and carrying it by suction through a flexible tube (2), the construction at the site is made more advantageous.

Although the above description is about the transfer of cement in the production of concrete or mortar, the present invention is not limited to cement and can be used for the transfer of other similar powders. Is included.

[0017]

The present invention relates to a method for transferring powder using a flexible tube held in a negative pressure state as described above. Conventional pneumatic transportation is mainly transportation accompanied by compressed air. Although the powder was apt to be scattered during transport, the negative pressure caused the powder to be transported by suction without causing any scatter, making it extremely practical as a powder transport in a relatively short section. . In particular, when used for putting concrete, mortar, etc. from cement bags at the construction site into a mixer, flexible container can be used, requiring no manual labor, and requiring enormous costs such as silo equipment Without this, cement can be easily and efficiently injected, which has a remarkable effect on the efficiency of plastering work and waterproofing work.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a concrete or the like manufacturing apparatus to which transfer according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cement container 2 Flexible tube 3 Tank 4 Filter 5 Hopper part 7 Mixer

Claims (3)

[Claims] When transferring powder from a powder storage section to a required location, a flexible tube is used, the inside of the tube is maintained at a negative pressure, the powder is sucked and conveyed together with air, and then the air is separated. And transferring the powder to a required location. 2. In the production of concrete or the like, cement is sucked and transported together with air into a tank from a cement container having a required capacity by using a flexible tube whose inside is kept under a negative pressure,
Concrete that separates air in the tank and accumulates cement in the hopper below the tank, then removes it from the lower outlet of the hopper, and mixes it with aggregates such as water, sand, and gravel. Transfer method of cement in the manufacture of cement. 3. A method for transferring cement in the production of concrete or the like, wherein the method for transferring cement according to claim 2 is performed at a site such as wall coating and waterproofing.