JP2002200418A - Water adding mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily agitate/mix granular substance with water homogeneously at the desired moisture content. SOLUTION: This water adding mixer has an agitation tool for agitating the granular substance and a spray nozzle 27 for spraying water 23 to the granular substance which are arranged in a casing 15 for housing the granular substance so that the granular substance housed in the casing is agitated/mixed with the water 23 sprayed through the nozzle 27 by the agitation tool. The nozzle 27 is provided with a wall surface 30 surrounding the nozzle 27 in a cylindrical state by leaving a space in the radial direction of the spray hole 24 and an air jetting nozzle 32 for making the pressurized air pass through the gap between the nozzle 27 and the wall surface 30 and jetting the pressurized air toward the tip side of the nozzle 27 intermittently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a casing provided with a stirrer for stirring powder and granules, and a spray nozzle for spraying water on the powder and granules. The present invention relates to a water mixing machine that stirs and mixes the stored powder and granules with water sprayed by the spray nozzle with the stirring tool.

[0002]

2. Description of the Related Art In a conventional water mixing machine, a spray nozzle is provided.
Substantially the whole is projected inside the casing and provided inside the casing.

[0003]

For this reason, there is a risk that the powder and the particles to be stirred and mixed adhere to and accumulate on the spray nozzle, and the spray range of the water by the spray nozzle changes, and water cannot be sprayed from the spray nozzle. There is a disadvantage that it is difficult to stir and mix the powder and the granules uniformly with a desired water content. The present invention has been made in view of the above circumstances, and has as its object to facilitate uniform stirring and mixing of a granular material and water at a desired moisture content.

[0004]

According to a first aspect of the present invention, there is provided a stirrer for agitating a granular material inside a casing accommodating the granular material, and a spray for spraying water on the granular material. A water mixing machine that stirs and mixes the powder and granules contained in the casing and the water sprayed by the spray nozzle with the stirrer, the nozzle being provided with an interval from a radial direction of a spray hole. It is characterized in that there are provided a wall surface which surrounds a cylindrical shape and an air injection nozzle which can intermittently inject pressurized air toward the tip of the spray nozzle through the space between the spray nozzle and the wall surface. [Operation] By providing a wall surface surrounding the spray nozzle in a cylindrical shape at a distance from the radial direction of the spray hole, it is possible to prevent powder particles from adhering and depositing on the spray nozzle as much as possible. Also, the pressurized air sprayed from the air spray nozzle toward the spray nozzle tip side through the space between the spray nozzle and the wall surface can blow off the powder and particles adhered and deposited on the spray nozzle, and also remove the pressurized air. It is possible to intermittently eject from the air ejection nozzle to blow off the attached and deposited powder particles with a small amount of air. [Effect] When the powder particles are deposited on the spray nozzle while preventing the powder particles from being deposited on the spray nozzle as much as possible, the powder particles can be blown off. And the possibility that water cannot be sprayed from the spray nozzle is reduced, and it is easy to uniformly stir and mix the granular material and water at a desired water content. Further, a small amount of pressurized air is intermittently jetted from the air jet nozzle, so that the attached and deposited powder can be efficiently and effectively blown off.

[0005] A feature of the invention according to claim 2 is that a recessed portion is provided on the inner surface of the casing so as to be recessed toward the outside of the casing, and the wall surface is formed by the recessed portion. [Function] A spray nozzle is provided so as to surround the spray nozzle at a concave portion provided on the inner surface of the casing at a distance from the radial direction of the spray hole and to pass through between the wall surface formed by the concave portion and the spray nozzle. The pressurized air can be intermittently jetted toward the spray nozzle tip. [Effect] The amount of protrusion of the spray nozzle from the inner surface of the casing can be reduced, and damage due to collision with the powder and granules to be stirred and mixed can be prevented.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIGS. 1 and 2 show a cement main material in which an aggregate such as sand and a filler are mixed with cement in a predetermined ratio, a fibrous material such as pulp, and an additive such as silica. The water mixing machine A according to the present invention for adjusting the raw material for forming the cement tile by stirring and mixing the raw material powder B with a predetermined amount of water.
Is shown.

The water mixing machine A includes a stirring device 16 for stirring the raw material particles B in a cylindrical casing 15 containing the raw material particles B, and a large number of sprays for spraying water on the raw material particles B. Device 17 is provided, and the raw material powder B accommodated in the casing 15 and water sprayed by the spray device 17 are stirred by the stirring device 16.
To stir and mix.

The agitating device 16 supports a rotary shaft 20 inside the cylindrical casing 15 concentrically with the casing axis X, and has a number of shovel-shaped stirring blades fixed to the rotary shaft 20. An example of a stirrer) 18 is rotated along the inner peripheral surface of the casing 15 by driving rotation of the rotating shaft 20 by the motor M1, and a mixer 19 that stirs and mixes the raw material particles B and water; A crushing tool 21 rotatable around an axis Y orthogonal to the axis X is supported between the movement paths of the stirring blades 18 adjacent in the casing axis X direction so as not to interfere with the movement of the stirring blades 18. A chopper 2 for crushing a lump (dama) of the raw material granules B mixed in the raw material granules B by rotation of the crushing tool 21 driven by the motor M2.
2 are provided.

[0009] As shown in FIG.
Spray nozzle body 2 having spray hole 24 opened at the tip
5 and a rectifying pipe 26 concentrically connected to a rectifying pipe 26 for rectifying and flowing pressurized water into the spray nozzle main body 25 so as to form a cylindrical casing so that water can be sprayed from substantially above the crushing tool 21. 15, casing axis X inside
The spray nozzle 27 is provided between the moving paths of the stirring blades 18 that are adjacent to each other in the direction, and the spray nozzle 27 is provided inside a cylindrical body 28 made of Teflon (registered trademark) resin or coated with Teflon resin to which the raw material powder B is difficult to adhere. The flow straightening pipe 26 is connected to a water supply pipe 29 outside the casing 15 so that the water 23 sprayed from the spray holes 24 is sprayed on the raw material particles B.

Then, the spray nozzle 2 is provided on the inner surface of the cylindrical body 28.
7 is formed in a tubular shape surrounding the spray hole 24 at a distance from the radial direction of the spray hole 24, and pressurized air is sprayed to the spray nozzle 27 and the wall surface 30.
An air jet nozzle 32 that jets intermittently toward the tip of the spray nozzle through an annular space 31 between the casing 15 and the casing 15 is fixed from the outside.

The air injection nozzle 32 includes a cylindrical air injection nozzle body 33 whose upper end is closed.
Screwed from the outside of the casing into the through hole formed in the nozzle, the straightening pipe 26 of the spray nozzle 27 is inserted concentrically into the air jet nozzle body 33 and integrally fixed, and the lower end of the air jet nozzle body 33 The cylinder 28 is screwed and fixed to the annular air injection hole 3 communicating with the annular space 31.
4 and the air supply pipe 35 is connected to the nozzle body 3 for air injection.
3 is connected in a radial direction.

The air supply pipes 35 of the air injection nozzles 32 are connected to the air tanks 36 via electromagnetic valves V common to the air supply pipes 35, and the compressed air compressed by the compressor is stored in the air tanks 36. In addition, the intermittent opening / closing operation of the electromagnetic valve V allows pressurized air to flow into the annular space 3.
1 to intermittently spray toward the tip side of the spray nozzle.

[Second Embodiment] FIG. 4 shows an air jet nozzle body 33 which is screwed into a through hole of a casing 15 from the outside of the casing and fixed to the inner surface of the casing 15 so as to be recessed toward the outside of the casing. An inlet 37 is formed, and the spray nozzle body 25 is connected to the air jet nozzle body 3.
3, a wall surface 30 is formed on the inner peripheral surface of the air injection nozzle main body 33, which surrounds the spray nozzle 27 in a cylindrical shape at a distance from the radial direction of the spray hole 24. Other configurations are the same as in the first embodiment.

[Third Embodiment] Although not shown, in the first embodiment or the second embodiment, the spray nozzle main body 25 is used.
So that all or a part of
A wall surface 30 surrounding the base side of the spray nozzle 27 is provided, and an air jet nozzle 32 capable of intermittently jetting pressurized air toward the tip end of the spray nozzle is provided between the wall surface 30 and the spray nozzle 27. May be.

[Other Embodiments] The water-mixing machine according to the present invention may be of a type that stirs and mixes various kinds of powder and granules other than the powder and granules used as a raw material for cement roof tiles with water. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a water mixing machine.

FIG. 2 is a cross-sectional view of a water mixing machine.

FIG. 3 is a sectional view of a main part of a water mixing machine.

FIG. 4 is a sectional view of a main part showing a second embodiment of the water mixing machine.

[Explanation of symbols]

 B granular material 15 casing 18 stirrer 23 water 24 spray hole 27 spray nozzle 30 wall surface 32 air spray nozzle 37 recess

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B28C 5/40 B28C 5/40 (72) Inventor Shuichi Mori 2 shares at Takamatsu, Kosai-cho, Koka-gun, Shiga Prefecture 1 share QF063 QA06 QB02Y QB03X QB12Y QB15X QD21 QD24 QE21 QF02Y QF07Y 4G035 AB46 AE08 AE13 4G037 AA02 EA03 4G056 AA06 AA11 AA19 CB23 CC02 CC01 CC01

Claims (2)

[Claims] 1. Inside a casing accommodating a granular material,
Providing a stirrer for stirring the granules and a spray nozzle for spraying water on the granules, and stirring and mixing the granules contained in the casing and the water sprayed by the spray nozzle with the stirrer. A water mixing machine, wherein a wall surface surrounding the spray nozzle in a cylindrical shape at an interval from a radial direction of a spray hole, and pressurized air is intermittently directed toward a spray nozzle tip side between the spray nozzle and the wall surface. A water mixing machine provided with an air injection nozzle capable of injecting air. 2. The water mixing machine according to claim 1, wherein a recessed portion is provided on the inner surface of the casing so as to be recessed toward the outer side of the casing, and the wall surface is formed by the recessed portion.