JP4148917B2 - mixer - Google Patents

Description

  The present invention mainly relates to a mixer for stirring and mixing injection grout, cement mortar, chemical grout chemicals, and the like.

Conventionally, various mixers for mixing cement mortar and the like have been proposed and put into practical use. For example, the mortar mixer of patent document 1 is one of them.
Japanese Examined Patent Publication No. 52-44661

  The present invention is a mixer that can mix and stir materials having different viscosities and densities efficiently and with good workability in a mixer such as the above-mentioned injection grout, cement mortar, and chemical fruct chemical solution, and is inexpensive. It is an issue to provide.

The configuration of the mixer of the present invention made for the purpose of solving the above problems is that a rotating plate having a hole at the center and a stirring blade for attaching to the rotating shaft on the lower surface is disposed at the bottom of the mixing tank. In addition, a fixed baffle plate is provided on the outer peripheral side of the stirring blade and at the bottom of the mixing tank at equal intervals, while a polygonal poker such as a round cross section or a triangular cross section is provided on the upper surface side of the rotating plate . provided is supported on the fixed baffle plate, it is characterized in that the cement-sand to be introduced from the top of the vessel was made to prevent the deposition on the rotating plate.

  In the mixer of the present invention, in the above configuration, a configuration in which the baffle plate is perforated, or a configuration in which the second fixed baffle plate is provided at equal intervals on the circumferential wall surface of the mixing tank can be adopted.

  Since the mixer of the present invention has the above configuration, the mixed liquid such as cement mortar is sucked from the hole provided on the center side of the rotating plate, and is vigorously discharged to the outside of the rotating plate by the stirring blade, which is a fixed baffle plate Since the mixed liquid is vigorously circulated up and down in the circumferential direction of the mixing tank, the mixture can be stirred and mixed well. In the mixer of the present invention, for the purpose of efficiently mixing and stirring emulsions, cement, sand and the like having different viscosities and densities, a round bar or a triangular scraper from the outer peripheral side of the mixing tank toward the upper surface of the rotating plate. Therefore, it is possible to prevent the cement, sand, and the like charged from the upper part of the mixing tank from accumulating on the upper surface of the rotating plate and to make a uniform mixed solution.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal front view of an example of the mixer of the present invention, and FIG. 2 is a plan view of the mixer of FIG.

  1 is a mixing tank opened by providing a discharge valve 2 that can be opened and closed at the bottom, 3 is a rotary shaft in which stirring blades 4 are radially fixed, and is connected to a drive source 5 such as a geared motor disposed on the upper part of the tank 1, The stirring blade 4 is disposed so as to face the bottom plate 6 of the tank 1. 5a is a reduction gear.

  A rotating plate 7 is provided with a hole 8 having an inner diameter of about ½ of the length of the stirring blade 4 at the center, and is attached to the upper surface of the stirring blade 4 so as to rotate integrally with the stirring blade 4. Rotating plate.

Reference numeral 9 denotes a first baffle plate erected radially on the bottom plate 6 on the outer side of the rotating plate 7. Here, a baffle plate having holes 9a is used, but a baffle plate without holes 9a may be used. 10 is a second baffle plate provided on the inner surface of the peripheral wall of the mixing tank 1 toward the center of the tank 1, and 11 is a cross-section provided along the upper surface of the rotating plate 7 attached to the baffle plate 9 or 10. It is a member having a polygonal cross section such as a round shape or a triangular shape, and is a member for preventing the liquid mixture from being deposited on the rotating plate 7. The wand 11 can be formed of an I-shaped or L-shaped plate material. 12 is a discharge pipe provided at the bottom of the mixing tank 1, 13 is a liquid level gauge, and 14 is a manhole used for internal inspection provided on the peripheral wall of the tank 1.

  In the above description, the fixed baffle plates 9 and the stirring blades 4 are provided in the same number, but the fixed baffle plates 9 may be provided more or less than the six stirring blades 4, and the number of these 4 and 9 in the present invention is arbitrary. is there. On the other hand, six baffle plates 9 and 10 are provided. The stirring blade 4, the baffle plate 9 and the baffle plate 10 are all provided symmetrically.

  In the mixer of the present invention configured as described above, the mixed solution to be stirred is put into the mixing tank 1, the driving source 5 is driven to rotate the rotating shaft 3, and the stirring blade 4 integrated with the rotating plate 7 is provided. The mixed solution is mixed by rotation. When the stirring blade 4 rotates, the mixed solution is centrifugally applied by the rotation, and is sprayed in a tangential direction from the outer periphery of the stirring blade 4, and the baffle plate outside the rotating plate 7. 9, it is ejected outward and its direction of movement is changed, and most of it rises along the inner periphery of the mixing tank 1, while the mixed liquid is sucked from the hole 8 in the center of the rotating plate 7, The mixture is vigorously circulated up and down and mixed with stirring.

  At the time of this stirring and mixing, there is a tendency that a space is generated in the central portion of the mixing tank 1 due to the centrifugal force due to a slight circulating flow of the mixed liquid along the inner periphery in the circumferential direction of the mixing tank 1. Prevents the generation of the mixed solution, and in combination with the above, the mixed solution can be stirred and mixed very well. When the operation is completed, the mixed solution may be taken out from the discharge pipe 12.

Generally, when determining the stirring and mixing state of a mixer, Re is the Ray noise number indicating the stirring and mixing state, p is the density of the mixed solution (Kg / m ³ ), n is the rotation speed (r · p · s) of the stirring blade, If the outer diameter (m) of the blade is d and the viscosity coefficient (Kg / m · s) of the mixed solution is μ,
Re = p ・ n ・ d ²・ μ ^-1
Re is preferably about 10 ³ to 10 ⁴ .

  Therefore, even if the density p and the viscosity coefficient μ of the mixed solution in the above formula change, in order to obtain a good stirring and mixing effect, the rotational speed n of the stirring blade 4 can be changed and Re can be kept at an optimal value. For this purpose, the rotation of the drive source 5 may be changed.

  The present invention is as described above, and a stirring blade integrated with a rotating plate having a hole in the center is fixed to a rotating shaft and attached to the bottom of the mixer, while the bottom of the mixing vessel is attached to the outer periphery of the stirring blade. Since a fixed baffle plate with equal intervals is provided on the outer side as appropriate, the mixed liquid can be sucked from the hole of the rotating plate and circulated vigorously in the circumferential direction of the mixing tank to achieve good stirring and mixing.

  In addition, in order to mix and stir emulsions, cement, sand, etc. with different viscosities and densities efficiently and satisfactorily, a round bar or a triangular shape is formed on the upper surface of the rotating plate equipped with stirring blades from the outer peripheral side to the center. Since the scraper is provided, it is possible to prevent the cement, sand, and the like introduced from the upper part of the mixing tank from accumulating on the upper surface of the rotating plate provided with the stirring blade, thereby forming a uniform mixed liquid.

The longitudinal section front view of an example of the present invention mixer. The top view of the mixer of FIG.

Explanation of symbols

1 Mixing tank 2 Discharge valve 3 Rotating shaft 4 Stirring blade 5 Drive source 6 Bottom plate 7 Rotating plate 8 Hole 9 First baffle plate
10 Second baffle
11 Poker
12 discharge pipe
13 Level gauge
14 Manhole

Claims (2)

A rotating plate having a hole in the central portion and provided with a stirring blade for attaching to the rotating shaft on the lower surface is disposed at the bottom of the mixing tank, and at the outer peripheral side of the stirring blade and at the bottom of the mixing tank at equal intervals. while providing a fixed baffle plate, the upper surface of the rotating plate, provided by supporting the Poker polygon such as a cross-section round or triangular cross section to the fixed baffles mixing tank, cement is introduced from the upper portion of the tank A mixer characterized in that sand or the like is prevented from accumulating on the rotating plate.   The mixer of Claim 1 which provided the 2nd fixed baffle plate in the circumferential wall surface of the mixing tank at equal intervals.

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