JPH0221294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for mixing powder and liquid.

Generally, devices using a horizontal stirring mixer are known as mixing devices for powder and liquid. In this device, powder and granular material is supplied into the fixed barrel through a pipe from a powder and granular material inlet provided at the upper part of one end of the fixed barrel, and the powder and granular material is supplied from the powder and granular material inlet to the upper part of the fixed barrel at a slight distance from the powder and granular material inlet. A liquid is supplied through a pipe into the fixed barrel from the liquid inlet provided at the fixed barrel, and the powder and liquid are mixed by rotating the stirring blade in the fixed barrel. It flows out from the outlet.

However, in this method of mixing powder and liquid, the liquid that has flowed into the fixed barrel is scattered by the rotating stirring blades and is scattered on the inner wall surface of the powder inlet and the inner wall surface of the powder inlet pipe. The powder and granules adhere to the inner surface of the powder introduction part, making it difficult to introduce the powder and granules sufficiently into the fixed barrel, and the powder and granules adhering to the liquid become lumps and form inside the fixed barrel. This has the disadvantage that powder and granules that do not mix with the liquid (hereinafter referred to as mama-powder) are generated, and the powder and the liquid are not mixed sufficiently.

In addition, a liquid supply tank surrounding the introduction pipe is provided on the outer periphery of the powder introduction pipe connected to the powder inlet of the horizontal stirring mixer, and this liquid supply tank is connected to the inside of the powder introduction pipe. The overflowing liquid supplied to the liquid supply tank is made to flow into the introduction pipe of the powder and granules, and the powder and granules are caused to flow into the mixer from the introduction pipe of the powder and granules. There is also a mixture of liquid and liquid, but in this case,
If the liquid supply tank is not level, the liquid cannot be uniformly supplied into the powder introduction pipe, causing the liquid to adhere to the inner surface of the powder introduction pipe, resulting in the formation of lumps of powder and powder. There was a drawback that the granules and liquid were not mixed sufficiently.

In view of the above circumstances, the present invention provides a mixer having an inlet, an inlet pipe provided above the mixer in a substantially vertical direction and connected to the inlet, and a pipe wall formed on the inlet pipe. and extends in the vertical direction of the introduction tube, communicates the inside and outside of the introduction tube, is connected to a liquid pressurization supply means, and supplies the liquid under pressure by the liquid pressurization supply means in a direction along the inner surface of the introduction tube. and a communication hole for forcing the powder to flow downward in an accelerated state, and the powder and granules supplied into the introduction pipe and the liquid supplied into the introduction pipe through the communication hole flow into the mixer. This prevents the powder from adhering to the inner surface of the inlet pipe, allows the powder to be sufficiently fed into the mixer, and allows the powder to mix with the liquid. An object of the present invention is to provide a mixing device for mixing powder and liquid, which can sufficiently mix the powder and liquid.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Reference numeral 1 in FIG. 1 is a horizontal stirring mixer, and a barrel 2 of this horizontal stirring mixer is fixedly provided on a floor surface (not shown). An inlet 3 is formed in the upper part of one end of the barrel 2, and an outlet 4 is formed in the lower part of the other end of the barrel 2.

A shaft 5 is rotatably provided on the barrel 2. This shaft 5 consists of small diameter parts 6, 7 at both ends and a large diameter part 8 between these small diameter parts 6, 7. The large diameter part 8 is located inside the barrel 2, and the small diameter parts 6, 7 are located inside the barrel 2. The small diameter portions 6 and 7 are supported by bearings 9 and 10 attached to the end plate of the barrel 2 while protruding from the end plate. A pulley 11 is attached to the small diameter portion 7. Two stirring blades 12 are attached to the outer peripheral surface of the large diameter portion 8. This stirring blade 1
2 is the area A shown in FIG. 4, that is, in the part where the powder and liquid are introduced in the barrel 2, a large number of substantially trapezoidal plates are arranged adjacently in a ribbon shape and in a spiral shape. They are arranged as shown. Further, in the B range shown in the figure, that is, in the mixing part of the powder and the liquid, the round bars are arranged in a spiral manner at intervals as shown in FIG. However, at positions C and D shown in FIG. 4, plate-shaped pieces are attached to the shaft 5 at both ends of its diameter.

The pulley 11 is connected to the rotating shaft of a drive motor (not shown) via the pulley of the drive motor and a belt, and when the drive motor is rotated, the shaft 5 normally rotates.
is adapted to rotate in the direction of arrow E in FIG.

A rectangular cylindrical introduction pipe 13 with a square cross section is connected to the inlet 3 of the barrel 2 . This introduction pipe 1
3 connects the lower introduction pipe 14, the upper introduction pipe 15, and the lower introduction pipe 14 and the upper introduction pipe 15,
It also consists of a tank 16 provided so as to surround the lower introduction pipe 14 and the upper introduction pipe 15 together. Note that the introduction tube 13 is not limited to having a rectangular cylindrical cross section, but may be a tube having another cross-sectional shape.

The distance between the opposing walls of the upper introduction pipe 15 is the same as that of the lower introduction pipe 14.
The lower end of the upper introduction pipe 15 is fitted into the upper end of the lower introduction pipe 14 for a predetermined length with a slight interval 17 between it and the upper end. ing.

The tank 16 has an upper wall 18, a lower wall 19, and an outer wall 20.
and an inner wall 21, and the upper end pipe wall of the lower introduction pipe 14 is used as the inner wall 21. Upper wall 18
A slight distance 22 is provided between the lower surface and the upper end surface of the lower introduction pipe 14. Also, tank 1
At least one through hole 23 is provided in the outer wall 20 of 6.
is formed. With this configuration, a communication hole 24 is formed within the through hole 23 and the tank 16, with a gap 22 and 17 between them. That is, this communication hole 2
4 is formed on the tube wall of the introduction tube 13, and the introduction tube 1
3, extends in the vertical direction of the lower introduction pipe 13, communicates the inside and outside of the introduction pipe 13, is connected to a liquid pressure supply means to be described later, and supplies the liquid under pressure by the liquid pressure supply means in a direction along the inner surface of the lower introduction pipe 14. It is designed to forcibly point towards the target and flow down at an accelerated rate.

Further, a liquid pressurization supply means (not shown) such as a pump is connected to a through hole 23 formed in the outer wall 20 of the tank 16.

Therefore, when mixing powder and liquid, the drive motor is rotated, and the shaft 5 and stirring blade 12 are rotated via a pulley and a belt.

Next, the powder and granules are introduced from the upper end of the upper introduction pipe 15, and the liquid is vigorously supplied into the tank 16 by the liquid pressure supply means. Then, this liquid passes through the gaps 22 and 17 and is forcibly directed in the direction along the inner surface of the lower introduction pipe 14, jets out into the lower introduction pipe 14, and flows down vigorously along the inner surface of the lower introduction pipe 14. , flows into the barrel 2 via the inlet 3. Therefore, no liquid adheres to the inner surface of the introduction tube 13. Also, this liquid is transferred to the lower introduction pipe 1.
When flowing into the upper introduction pipe 15, it is blocked by the lower end of the upper introduction pipe 15, so that it flows down without adhering to the inner surface of the upper introduction pipe 15.

Furthermore, at the same time as the liquid flows down within the lower introduction pipe 14, the powder and granules that have flowed into the upper introduction pipe 15 flow down into the lower introduction pipe 14 due to their own weight.

Since the liquid flows down vigorously along the inner surface of the lower introduction pipe 14, this powder and granular material does not adhere to the liquid and form lumps, and immediately flows into the barrel 2 through the inlet port 3. do. Therefore, powder particles do not adhere to the inner surface of the introduction tube 13.

The liquid and powder that have flowed into the barrel 2 are first stirred and mixed by stirring blades in range A shown in FIG. 4 and sent to range B shown in FIG. The stirring blades within range A transport liquid and powder slightly into the lower inlet pipe 1.
However, since the liquid flows down vigorously along the inner surface of the lower introduction pipe 14 as described above, the powder and granules scattered by the stirring blades adhere to the inner surface of the introduction pipe 13. Never.
Since the stirring blade in the A range is composed of a large number of plate-like pieces, it has a relatively strong conveying force in the axial direction of the barrel 2 at the same time as it mixes the powder and the liquid. Good delivery of liquid to B range.

The powder and liquid sent to the B range shown in Fig. 4 are well mixed by the stirring blades in this B range and usually become paste or liquid, and are sent to the outlet 4 and flow out from the outlet 4. . In the case of paste, the stirring blades except for parts C and D within range B are made up of many round bars, so they mix the powder and liquid well, but the conveyance force in the axial direction of barrel 2 is slightly weak. . Therefore, the plate-like pieces provided at positions C and D shown in FIG. 4 assist in conveying the usually paste-like mixture formed by mixing the powder and liquid.

Therefore, according to the mixing device of this embodiment, if the powder and the liquid are continuously supplied into the introduction pipe 13 as described above, they can be mixed continuously and flowed out.

In the above embodiment, the communication hole 24 provided in the introduction pipe 13 is connected to the through hole 2 of the tank 16.
3. Although the spacing 17 and 22 are described above, the space is not limited to this, but is formed on the wall of the introduction tube 13, extends in the longitudinal direction of the introduction tube 13, and communicates between the inside and outside of the introduction tube 13. The holes may have other configurations as long as they are holes.

Further, in the above embodiment, the mixer for mixing the powder and the liquid was a horizontal stirring mixer, but it is not limited to this, and it may be, for example, a vertical stirring mixer, or other types of mixers may be used. It may also be a batch mixer.

As explained above, according to the present invention, there is provided a mixer having an inlet, an introduction pipe provided above the mixer in a substantially vertical direction and connected to the inflow port, and a pipe wall of the introduction pipe. , which extends in the vertical direction of the introduction tube, communicates the inside and outside of the introduction tube, and is connected to a liquid pressurization supply means, and the liquid pressurized and supplied by the liquid pressurization supply means is supplied to the inner surface of the introduction tube. and a communication hole for forcing the flow to flow down in an accelerated state in a direction along the direction of Since the liquid is mixed by flowing into the machine, the liquid supplied under pressure by the liquid pressurizing supply means is forcibly directed in the direction along the inner surface of the introduction tube, and the liquid is accelerated in an accelerated state along the inner surface of the introduction tube. It can flow down well and can prevent the powder from penetrating in a direction substantially perpendicular to the direction of flow of the liquid flowing down along the inner surface of the introduction pipe,
It is possible to prevent the powder and granules from adhering to the inner surface of the inlet pipe, thereby preventing the powder and granules from adhering to the liquid and forming lumps, and ensuring that the powder and granules are not sufficiently introduced into the mixer. The powder and liquid can be sufficiently mixed. Further, if the mixer is a stirring mixer and an outlet is provided in the stirring mixer, the powder and granular material and the liquid can be mixed and flowed out continuously.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG.
A schematic cross-sectional view taken along the line, and FIG. 4 is an enlarged detailed cross-sectional view of the main part thereof. 1...Horizontal stirring mixer, 2...Barrel, 3...
Inlet, 4... Outlet, 12... Stirring blade, 13
...Introduction pipe, 14...Lower introduction pipe, 15...Upper introduction pipe, 16...Tank, 24...Communication hole.

Claims (1)

[Scope of Claims] 1. A mixer having an inlet, an inlet pipe provided above the mixer in a substantially vertical direction and connected to the inlet, and a mixer formed on the wall of the inlet pipe. It extends in the vertical direction of this introduction tube, communicates the inside and outside of this introduction tube, and is connected to a liquid pressurization supply means, and the liquid pressurized and supplied by this liquid pressurization supply means is directed in a direction along the inner surface of the introduction tube. The mixer includes a communication hole that is forcibly directed and flows downward in an accelerated state, and allows the powder and granular material supplied into the introduction pipe and the liquid supplied into the introduction pipe through the communication hole to flow into the mixer. A mixing device for mixing powder or granular material and a liquid. 2. The mixer is a horizontal stirring mixer in which stirring blades are rotatably provided in a barrel having an inlet and an outlet, and the inlet of the horizontal stirring mixer is located at the upper part of the barrel, Claim 1, wherein when the stirring blade rotates, the stirring blade is formed on a side that transports the granular material, the liquid, and the mixture of the granular material and the liquid in the barrel to the bottom of the barrel. A device for mixing the described powder and granular material with a liquid.