JPH0632328Y2 - Continuous kneading device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an apparatus for producing a kneading material used as a construction material such as mortar, and is particularly suitable for producing a large amount of kneading material. The object is to provide a kneading device.

[Conventional technology and problems]

A mortar mixer as a so-called kneading device for producing a kneading material such as mortar is well known. By the way, most of the mortar mixers that have hitherto been generally used are usually configured as a batch-type kneading device.

Therefore, in the case of large-scale construction that requires a large amount of kneading materials such as mortar at one time, such as construction of a coastal road, construction of a submarine tunnel, or pre-packed concrete construction as underwater concrete construction, the batch method described above is used. However, there was a problem that the kneading device of No. 2 could not sufficiently cope with this.

Therefore, as a measure to cope with the case where a large amount of kneading material is required, it has been attempted to increase the size of a conventional batch-type kneading device. However, the production cost of the device,
There were drawbacks such as higher operating costs and higher product costs. On the other hand, there is a continuous kneading device as an alternative to the batch system, but in general, there are many small kneading devices, and there is a difficulty in increasing the size as in the case of the batch system. That is, the conventional continuous kneading apparatus is configured with a mechanism in which a stirring blade is rotated in a kneading container to stir and mix by utilizing a so-called centrifugal force, which is combined with an agitator or the like to be manufactured. Therefore, the mechanism becomes complicated and there is a difficulty in increasing the size.

In any case, at present, there is no device that can adequately support the production of a large amount of kneading materials such as mortar, and there is a demand for the development of a kneading device with functionality and economy suitable for mass production. It is being done.

[Means for solving problems]

In order to meet such demands, the present invention has devised a kneading device having functionality and economy capable of continuously producing a large amount of kneading material such as mortar. Will be described.

The kneading casing, the rotation shaft around which the feed screw is wound, and the mixing screw partially wound around the intermediate portion between the base end portion and the tip end over the entire length from the base end to the tip end. A rotary shaft around which a feed screw wound in the reverse direction of the mixing screw was wound, and a kneading water jetting and supplying device were combined as follows to form a continuous kneading device.

First, the kneading casing is composed of a tubular body composed of a large diameter part and a reduced diameter part, and a supply port for the material to be kneaded is provided on the base end side of the large diameter part, and the tip of the reduced diameter part. A discharge port was provided on the part side.

Next, a plurality of rotary shafts each having a feed screw wound over the entire length were arranged in the large diameter portion of the kneading casing so as to be parallel to the axis of the kneading casing.

Further, the mixing screw is partially wound around an intermediate portion between the base end portion and the tip end portion, and the rotation shaft around which the feed screw reversely wound from the mixing screw is wound from the tip end portion is the kneading casing. Through between the rotary shaft arranged in the large diameter part of the, and the part of the feed screw wound from the tip end so as to be located in the reduced diameter part of the kneading casing and parallel to each of the rotary shafts. Arranged.

Further, the kneading water jetting / supplying device is mounted on the outer periphery of the large diameter portion of the kneading casing so as to be able to supply the kneading water into the kneading casing.

[Action]

Since the present invention is configured as described above, when the material to be kneaded is supplied from the supply port side and each rotary shaft is rotationally driven, the material to be kneaded is arranged in the large diameter portion of the kneading casing. The mixture is agitated and mixed by the feed screw and the mixing screw of each rotary shaft, and is discharged from the discharge port to the outside as a homogeneous kneading material by the feed screw located inside the reduced diameter portion of the kneading casing.

Particularly, in the device of the present invention, a rotary shaft having a mixing screw partially disposed between the rotary shaft and a rotary shaft around which a feed screw for transporting the material to be mixed from the supply port of the kneading casing to the discharge port side is wound. Since the material to be kneaded transferred by the feed screw reaches the mixing screw position, the mixing screw gives a material to be kneaded a transfer action opposite to the transfer direction of the feed screw. The material to be kneaded is scraped from the side of the feed screw, inverted, and subjected to the stirring and mixing action.

Further, the material to be kneaded, which has been transferred toward the discharge port by the feed screws on both sides, is again kneaded by the feed screw in the discharge process in the reduced diameter portion of the kneading casing.
In other words, it undergoes a kneading action, becomes a very homogeneous kneading material, is discharged to the outside of the apparatus, and undergoes an extremely efficient kneading action.

〔Example〕

Further, the present invention will be specifically described based on an embodiment in which the present invention is configured as a continuous kneading apparatus for producing mortar.

FIG. 1 is a mechanical view showing a main part of the apparatus, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. First, in FIG. 1, 1
Is a kneading casing consisting of a tubular body with one end reduced in diameter.
Is a supply port for the material to be kneaded, which is provided on the large diameter side of the kneading casing. 3 is a discharge port provided on the diameter reducing side. Reference numeral 4 is a rotary shaft around which the feed screw 4a is wound over the entire length of the base end portion, the left side and the front end portion in the figure, and the right side in the figure.
Reference numeral 5 is a rotary shaft in which a partial mixing screw 5a is wound around an intermediate portion between the base end portion and the tip end portion, and a feed screw 6 opposite to the mixing screw 5a is wound around the tip end portion. Is.

The rotary shaft 4 around which the feed screw 4a is wound over the entire length is arranged such that two stations are arranged in parallel in the large diameter portion of the kneading casing 1 as shown in the drawing, and the mixing screw 5a and the feed screw 6 are wound. The mounted rotating shaft 5 is arranged between the rotating shafts 4 and 4, and the feed screw 6 is arranged so as to be located in the reduced diameter portion of the kneading casing 1. That is, the material to be kneaded supplied from the supply port 2 side of the kneading casing 1 is kneaded in the large diameter part in parallel with the axis of the kneading casing 1, and is transferred to the discharge port 3 side of the reduced diameter part. It is arranged.

The feed screws 4a, 4a and the mixing screw 5a provided on the rotary shafts 4, 4 and 5 are housed in the kneading casing 1 in the form of being mutually wrapped as shown in FIG.

Further, in the embodiment, the mixing screw 5a is
Feed screws 4a and 4 of the rotating shafts 4 and 4
The mixing screw 5a and the feed screws 4a and 4a are arranged so as to be positioned substantially in the middle of a, and the material to be kneaded is inverted and transferred in the large diameter portion of the kneading casing 1 as shown by the arrow in FIG. The kneading and stirring action is set to give the material to be kneaded.

That is, the twisting direction of the mixing screw 5a or the rotating direction of the rotary shaft 5 having the mixing screw 5a is set to the rotary shaft 4 having the feed screws 4a, 4a.
And 4 are set in the opposite direction, and the material to be kneaded transferred to the side of the supply port 2 is provided with a reversing action as shown by an arrow in the middle of the kneading casing 1 so that a stirring and mixing action is given. There is.

Reference numeral 7 denotes a mixed water injection supply device assembled on the outer periphery of the kneading casing 1, which is provided with a plurality of branch pipes 9 from a header pipe 8 connected to a water supply pump (not shown), and each of the branch pipes 9 has an injection nozzle 10 Is attached, and the mixed water is supplied from the injection nozzle 10 into the kneading casing 1.

As shown in the embodiment of FIG. 1, the injection nozzle 1
The arrangement of 0 is set around the position where the feed screw 4a and the mixing screw 5a correspond to each other in the kneading casing 1, that is, on the outer periphery of the large diameter part of the kneading casing 1, so that stirring and mixing are more appropriate and effective. It is set so that it can be promoted.

Next, in FIGS. 3 and 4, in order to further improve the kneading material production capacity, a rotary shaft 4 having a feed screw 4a, a mixing screw 5a, and a mixing screw 5a and a reverse-feeding feed screw 6 are provided. This is an example of a so-called multi-axis type in which the number of shafts 5 is increased.

That is, FIG. 3 is a 5-axis type, and FIG. 4 is a kneading material coming out from both sides of the 3-axis type shown in FIG. Is kneaded again, and a more homogeneous and large amount of kneading material can be continuously produced.

Therefore, a case of producing mortar using the apparatus for producing mortar shown in FIG. 1 will be described next. First, admixtures such as cement and fly ash, which are raw materials for mortar, and sand and admixtures such as water-reducing agents and expanding agents are mixed according to the usage, and continuously supplied from the supply port 2 provided on the left side of the kneading casing 1. Supply to. At the same time, the feed screw 4a
The rotary shafts 4, 4 and 5 each having the mixing screw 5a and the feed screw 6 which is reversely wound with the mixing screw 5a are rotationally driven. Further, an appropriate amount of mixed water is continuously supplied from the mixed water injection / supply device 7. Then, the material to be kneaded is transported rightward in the large diameter portion of the kneading casing 1 by the feed screws 4a, 4a. Then, when it reaches the position of the mixing screw 5a, it is reversed by the action of the mixing screw 5a and is subjected to the stirring and mixing action, and the feed screw 4 again.
It is scraped to the sides of a and 4a and transferred to the side of the reduced diameter portion having the discharge port 3.

The kneaded material transferred to the discharge port 3 side of the reduced diameter portion is fed by the feed screw 6 disposed in the reduced diameter portion, that is, the feed screw 6 provided coaxially with the mixing screw 5a.
The mortar is kneaded by, and repeatedly acted again, and is discharged from the casing 1 as a homogeneous mortar.

As shown in FIG. 3, the rotary shaft 4 having the feed screw 4a is made into three units, and the mixing screw 5a and the feed screw 6 which is reversely wound with respect to the mixing screw 5a.
If the rotary shaft having 2 is used as a 5-axis type, and if a plurality of mixing screws 5a are provided at intervals, the material to be kneaded has a stirring and mixing action every time it passes through each mixing screw 5a position. It is repeatedly kneaded, and is kneaded again in the process of being transferred in the direction of the discharge port 3, that is, it is subjected to a kneading action, and a more homogeneous kneading material can be continuously produced, and mass production can be coped with. It is a thing. Similarly, in the case of the embodiment shown in FIG. 4, a large amount of kneading material can be manufactured by receiving an extremely efficient kneading action.

Reference numeral 12 shown in FIGS. 3 and 4 is a partition wall provided to prevent formation of a dead zone in the kneading casing 1.

[Effect of device]

As described above, the present invention arranges a mixing screw partially provided with a rotary shaft having a feed screw as described above and a rotary shaft having the mixing screw and a reversely-wound feed screw in a kneading casing to form a feed roller. The material to be kneaded, which is transferred by the screw, is inverted by the mixing screw in the transfer process to stir and mix, and the kneaded material is manufactured by jetting and supplying mixed water from the outer peripheral portion. Compared with the batch-type or continuous-type manufacturing apparatus, the following functionality and economy as a kneading apparatus can be exhibited.

(1) Since the mixing is performed by stirring with the feed screw and the mixing screw, the homogeneity as a kneading material is high.

(2) Since the structure is simple, it is easy to configure the rotary shaft equipped with the feed screw and the mixing screw as a multi-shaft type with 5 or 6 shafts, and in particular, the above-mentioned mixing screw of the rotary shaft equipped with the mixing screw. By providing a plurality of positions at intervals, it is possible to provide the material to be kneaded with a repeated action of stirring and mixing, and it is possible to obtain a highly functional device capable of continuously producing an extremely homogeneous kneading material.

Furthermore, if it is configured as a multi-screw type, the material to be kneaded, which has been transferred by a plurality of feed screws, is re-kneaded at the stage of being discharged from the device through the discharge port of the kneading casing, that is, it has a kneading action. On the other hand, in combination with the repeated action of mixing by the mixing screw described above, it is possible to exhibit extremely high functionality as a kneading device.

(3) Kneading with an optimal variation according to the type and physical properties of the material to be kneaded, simply by changing the shape or combination of the rotation speed or rotation direction of each rotating shaft that constitutes the device or the twisting direction of the mixing screw. It is possible to carry out processing, and high functionality is guaranteed as a kneading device for mass production.

As described above, the continuous kneading device according to the present invention can be easily increased in size to cope with mass production, and is particularly excellent in economic efficiency and productivity as compared with the production cost of products due to the increase in size of conventional devices. It has a characteristic as a kneading device.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 1 is a mechanical diagram of a main part of an apparatus configured as a continuous kneading apparatus for mortar production,
2 is a vertical sectional view taken along the line AA in FIG. 1, and FIG.
FIG. 4 is a mechanical diagram of a main part of the device configured as a shaft type, and FIG. DESCRIPTION OF SYMBOLS 1 ... Kneading casing 2 ... Feeding port for materials to be kneaded 3 ... Discharge port 4a ... Feed screw 4 ... Rotating shaft of feed screw 5a ... Mixing screw 5 ... Rotating shaft of mixing screw 6 ... Feed screw 7 ... Mixing water jetting / supplying device 10 ... Injection nozzle

Claims (1)

[Scope of utility model registration request] 1. A kneading casing 1, a rotary shaft 4 around which a feed screw 4a is wound, and a mixing screw 5a partially in an intermediate portion between the base end portion and the tip end portion over the entire length from the base end portion to the tip end portion. A continuous kneading device comprising a rotating shaft 5 wound around a feed screw 6 which is wound in the opposite direction from the mixing screw 5a, and a kneading water jetting / supplying device 7 from the front end portion. 1
Is a tubular body composed of a large-diameter portion and a reduced-diameter portion, has a supply port 2 for the material to be kneaded on the base end side of the large-diameter portion, and a discharge port on the tip end side of the reduced-diameter part. 3, the rotary shaft 4 having the feed screw 4a wound around the entire length thereof has a plurality of rotary shafts arranged in a large-diameter portion of the kneading casing 1 in parallel with the axis of the kneading casing. Part of the mixing screw 5a is wound around an intermediate portion between the end portion and the tip portion, and the feed screw 6 which is reversely wound to the mixing screw 5a is wound around the tip portion. The part of the feed screw 6 which is passed through the rotary shaft 4 and the rotary shaft 4 arranged in the large diameter part of the kneading casing 1
The rotating shafts 4, 4 and 5 are arranged in parallel in the kneading casing so as to be located in the reduced diameter part of the kneading water supply device 7, and the kneading water supply device 7 is provided on the outer circumference of the large diameter part of the kneading casing 1. A continuous kneading device, which is equipped so as to be able to supply kneading water into the kneading casing 1 attached thereto.