JPS61273908A - Continuous kneader for concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous mixing device for concrete that continuously mixes and produces concrete.

[Conventional technology]

As we all know, concrete is made of cement, water, fine aggregate,
Conventionally, it is manufactured by mixing materials such as coarse aggregate at the pouring site or at a ready-mixed concrete factory.

Batch-type kneading equipment is generally used as the kneading equipment used for kneading the above-mentioned materials. In this batch-type kneading equipment, each of the above-mentioned materials is weighed and put into a kneading drum, and the mixture is mixed by rotation of stirring blades. After kneading for a predetermined period of time, the entire amount is taken out and used.

□・):e (Problems to be solved by the invention)'5)j:5, ;, LHowever, the above-mentioned batch-type apparatus had the following problems. In the equipment, especially when coarse aggregate with a large particle size is used, the coarse aggregate tends to increase in the early stage of the outflow due to the high mobility of the coarse aggregate in the concrete. In some cases, the distribution of coarse aggregate may become uneven (segregation).Also, when producing large quantities of concrete, large-scale equipment is required, and such large-scale equipment is difficult to move and install. Not only does it require a lot of labor, but it is also economically disadvantageous due to rising equipment costs.Furthermore, in sites where large quantities of concrete are used, batch-type equipment requires multiple equipment to be used. There was a problem in that the operation had to be performed piecemeal for each device using the conventional method, making the work plan complicated.

In view of these circumstances, the present invention is capable of homogeneously kneading and taking out materials in a homogeneous state, improves production efficiency compared to the type of equipment, and enables the production of a large amount of concrete with a small equipment. It is an object of the present invention to provide a continuous mixing device for concrete that is compatible with manufacturing and that can easily carry out systematic work even when a large amount of concrete is used.

[Means for solving problems]

The present invention includes a mortar mixing section that mixes water, cement, and fine aggregate to produce mortar, and a concrete mixing section that mixes mortar and aggregate produced in the mortar mixing section to produce concrete. In the continuous concrete mixing apparatus, the mortar mixing section includes a material inputting section at one end of a tiltable mortar mixing drum, a mortar delivery section at the other end, and a mortar mixing section in which the mortar mixes in the mortar mixing drum. is rotatably provided with an agitating blade that mixes the raw materials and sends them to the mortar delivery section, while the concrete mixing section is provided with a stirring blade that mixes the raw materials and sends the raw materials to the mortar delivery section, while the concrete mixing section has an agitator blade that is rotatably disposed at one end of the concrete mixing drum that is tiltable and rotatable. It has a mortar and aggregate input section into which mortar and separate aggregate are input, and a concrete delivery section is provided at the other end, and the concrete mixing drum is further provided with a mortar and aggregate input section into which the mortar and aggregates are mixed. It has a structure in which a concrete stirring member that sends the concrete to the delivery section is permanently installed.

[For production]

Therefore, in the present invention, the mortar raw materials charged into one mortar kneading drum are sent to the mortar delivery section while being stirred and mixed, and introduced into the concrete mixing drum from the mortar delivery section, and in the concrete mixing drum, the aggregates separately charged are sent to the mortar delivery section. The concrete is sent to the concrete delivery section while being stirred and mixed, and is discharged as concrete from the concrete delivery section.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The continuous mixing device shown in the figure is composed of a mortar mixing section and a concrete mixing section. In the figure, (1) is a cylindrical drum in the mortar mixing section, and (2) is a cylindrical drum in the concrete mixing section. The 0 drum (1), which is
) is supported on a support frame (5) which is tiltable with the bottle (4) as a fulcrum, and water and cement are placed on the top of the side end of the bottle (4).

Raw material inlet for introducing mortar raw materials such as fine aggregate (
6) is provided at the bottom of the opposite end of the pin (4).

A mortar outlet (7) for discharging mortar is provided. Also, inside the upper column (1) there is a stirring blade (
A rotating shaft (9) is provided, the rotating shaft (9) having a
One end protrudes through the end surface of the drum (1) on the side of the bin (4) via a bearing Ql, and a sprocket wheel (11) is attached to the protrusion to receive a driving force from a drive device (not shown).

The drum (2) is rotatably supported on its outer circumferential surface by a plurality of rollers, and has an annular gear 0 on its outer circumferential surface.
is fixed, and a gear (14) driven by a drive device (not shown) is meshed with the gear (13).The roller α2 is tiltable on the pace frame a9 with the bin αe as a fulcrum. A supporting frame is provided and supported on the wound.

The end of the drum (2) on the side of the bin αυ is arranged below the mortar outlet (7) of the drum (1), and the mortar from the mortar outlet (7) and separate aggregate are transferred to the drum (2).
A charging hopper αη is provided for charging the concrete into the container, and a delivery chute 0s as a concrete delivery unit is provided at the end of the drum (2) opposite to the bin (Ie). (The first part is installed so that it does not rotate even if the drum (2) rotates. Furthermore, inside the drum (2), there is a concrete stirring member.
For example, a ribbon formed by spirally forming a band-shaped metal plate or a plurality of annular baffle plates (none of which are shown) arranged at appropriate intervals are fixedly provided.

In the continuous kneading device having such a configuration, cement,
Mortar raw materials such as water and fine aggregate are weighed and thrown in, and coarse aggregate is weighed and continuously thrown in from the hopper (17) to continuously produce concrete.

That is, in the drum (1), the raw material introduced into the drum (1) from the raw material input port (6) is kneaded by the rotation of the stirring blade (8), and the mortar is moved to the mortar outlet (force side). When kneading this mortar, the particle size distribution range of the materials to be kneaded is smaller than when kneading with a batch-type concrete kneading device, in other words, the particle sizes are relatively uniform, so the mixing efficiency is high. Therefore, homogeneous mortar can be easily obtained.The mortar exploded in the drum (1) is fed from the outlet (7) into the drum (2) via the hopper αη. As shown, by tilting the support frame (5) about the bin (4) and tilting the drum (1), the mortar in the drum (1) is sent out from the outlet (force). The mortar kneading time can be increased and the mortar kneading time can be adjusted.In addition, in the case shown, the support frame (5)
A spacer piece (A) is interposed between the tilting end of the frame (3) and the frame (3).

On the other hand, in the drum (2), when the mortar from the drum (1) is charged, coarse aggregate (fine aggregate may be included if necessary) is added to one mortar at a predetermined ratio. Added in hopper 09 parts.

Thus, in the drum (2), the mortar and coarse aggregate are stirred while rotating the drum (2), and in the process, the surface of the coarse aggregate is coated with mortar, producing high-quality ready-mixed concrete.
The concrete is sent toward the delivery chute 0 seconds, which is the concrete delivery section, and is continuously discharged. At this time, as shown by the two-dot chain line, by tilting the support frame α9 with the pin (16) as the fulcrum, the time for the concrete in the drum (2) to be discharged from the delivery chute at 0 seconds can be extended. This allows the mixing time of concrete to be adjusted. In the illustrated case, a spacer piece C1J is interposed between the tilting end of the support frame α9 and the base frame α.

As described above, since the concrete delivery and the kneading operation are performed simultaneously and continuously, segregation of coarse aggregate does not occur in the delivered fresh concrete. Therefore, homogeneous concrete can be obtained continuously with good productivity. In the above embodiment, when the drums (1) and (2) are tilted through the α marks of each support frame (5), the spacer pieces (1)
) CI), but instead of these, for example cylinders,
A screw rond method can be used.

〔Effect of the invention〕

As explained above, according to the continuous mixing apparatus for concrete of the present invention.

(+) In the mortar mixing section, only mortar raw materials such as cement that do not contain coarse aggregate are kneaded into mortar, and therefore the mixing efficiency is high.

(IT) In the concrete mixing section, it is sufficient to mix aggregate with homogenized mortar. Even if it is coarse aggregate, the mixing efficiency is high, and therefore homogeneous concrete can be manufactured with high productivity. In addition, it can be made smaller than conventional batch-type kneading equipment.

(iii) Since the manufactured concrete IJ-t is continuously delivered while performing a kneading operation, homogeneous concrete can be obtained without segregation of coarse aggregate occurring in the taken out concrete. ) Because each drum can be tilted.

The kneading time can be adjusted0 It can produce excellent effects such as

[Brief explanation of drawings]

The figure is a schematic side view showing one embodiment of the present invention. (1) (2) is the drum, (6) is the raw material input port, (7)
is the mortar outlet, (8) is the stirring blade, and αη is the input hopper. The α mallet indicates the delivery chute.

Claims (1)

[Claims] 1) Equipped with a mortar mixing section that mixes water, cement, and fine aggregate to produce mortar, and a concrete mixing section that mixes mortar and aggregate produced in the mortar mixing section to produce concrete. In the continuous concrete mixing apparatus, the mortar mixing section is provided with a raw material input section at one end of a tiltable mortar mixing drum, and a mortar delivery section at the other end, and in the mortar mixing drum, A stirring blade that mixes the raw materials and sends them to a mortar delivery section is rotatably provided, and the concrete mixing section is provided with mortar from the mortar mixing drum at one end of a tiltable and rotatable concrete mixing drum. It has a mortar and aggregate input section into which separate aggregate is input, and a concrete delivery section is provided at the other end.
The continuous mixing device for concrete is further characterized in that a concrete stirring member is fixedly installed in the concrete mixing drum for kneading mortar and aggregate and sending them to the concrete delivery section.