JPH0221936A - Liquid agitation device - Google Patents

Abstract

PURPOSE:To equalize the slurry concentration by making the lower part of an agitation water vessel to communicate with the suction port of a circulation pump and connecting the delivery port of the circulation pump with spouting openings. CONSTITUTION:When an opening and closing valve 22 provided in a suction piping 20 is opened and the circulation pump 12 is put in operation, the slurry in the agitation water vessel 10 is sucked into the impeller casing 13 of the circulation pump 12 through the suction piping 20. Then, the slurry is flowed through delivery piping 18 and is energetically spouted from plural spouting openings 19 into the slurry in the agitation water vessel 10, and the slurry in the agitation water vessel 10 is agitated by the spouting energy. Thus, by circulating the slurry continuously through the circulation pump 12, the concentration of slurry is allowed to be equalized, and the maintenance is extremely easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention is applicable to a stirring water tank in which water containing a lot of sinkable substances such as fresh concrete slurry 1 or lime or sewage is stored. The present invention relates to a fluid agitation device for floating and agitating substances.

(b) Prior Art For example, in the case of fresh concrete slurry, if no stirring is performed, concrete components will settle to the bottom due to gravity settling.

If this slurry is directly poured onto the workpiece at the construction site, the moisture content of the workpiece will be uneven, and as a result, the strength of the workpiece will also be uneven, and there is a risk that it will not be able to withstand use over many years. There is.

In order to solve this problem, the present applicant previously disclosed in Japanese Unexamined Patent Publication No. 56-115626 that it is possible to quickly float the deposits and increase the sufficient stirring effect, and to reduce the slurry concentration throughout the inside of the stirring water tank. Disclosed is a fluid agitation device that can make the fluid uniform.

(c) Problems to be Solved by the Invention However, such conventional fluid stirring devices still have the following problems.

■Since the fluid agitation device is placed inside the agitation tank, if a failure occurs, it must be removed from the agitation tank, repaired, and then reinstalled into the agitation tank after repair. Therefore, maintenance becomes complicated.

(2) Furthermore, the driving source of the motor or the like that rotates the impeller in the fluid agitation device must be watertight, making the watertight sealing mechanism complicated and increasing the manufacturing cost.

(2) Furthermore, it only has a fluid stirring function, and a separate slurry transfer device is required to transfer the uniformly stirred slurry to the construction site.

An object of the present invention is to provide a fluid stirring device that can solve the above problems.

(d) Means to solve the problem The present invention provides a circulation pump outside the stirring water tank, connects the lower part of the stirring water tank to the suction port of the circulation pump, and
The present invention relates to a fluid stirring device characterized in that a discharge port of the circulation pump is connected to a jetting opening in a stirring water tank.

(e) Action and effect With the above configuration, the present invention has the following effects.

■Since the circulation pump that constitutes the main body of the fluid stirring device is placed outside the stirring water tank, if a failure occurs, the circulation pump can be inspected and repaired on the spot, making maintenance extremely easy.

■Also, since the circulation pump that constitutes the main body of the fluid stirring device is placed outside the stirring water tank, the watertight seal mechanism can be made simpler than when it is placed inside the stirring water tank. The stirring device can be manufactured at low cost.

■Furthermore, 1III+ that constitutes the main body of the fluid stirring device
The ring pump is placed outside the stirring water tank, so if necessary,
By disconnecting the discharge port of the circulation pump from the discharge pipe and connecting the pipe for transferring slurry, etc. to the discharge port of the circulation pump, the fluid stirring device has a slurry transfer function in addition to the slurry stirring function. This makes it possible to eliminate the need for a slurry transfer device.

(f) Examples The present invention will be specifically described below based on examples shown in the attached drawings.

In the embodiment shown in FIGS. 1 to 4, 1o is a stirring water tank, and an inlet 11 is provided in the upper part of the tank 1o for introducing hentonite and the like.

A circulation pump 12 is disposed outside the stirring water tank 10, and as shown in FIG. It is connected to the impeller casing 13 and connected to the impeller 1.3a inside.
The motor casing 14 has a built-in motor 14a for rotating the motor 14a. Note that 15 is a support base on which the circulation pump 12 is placed and supported.

In the above configuration, the impeller casing 13 has a suction port 16 in the front central part thereof, as shown in FIGS. 3 and 4.
is provided, and a plurality of discharge ports 17 are provided on the outer periphery thereof.

Note that the discharge direction of the discharge port 17 extends in the tangential direction of the outer peripheral edge of the impeller 1.3a, and discharges the slurry and the like in a circular south direction.

As shown in FIGS. 1 and 2, the plurality of discharge ports 17 of the circulation pump 12 include a plurality of jetting openings 19 provided at approximately equal intervals on the peripheral wall of the stirring water tank 10, and a plurality of jetting pipes 18. It is connected via.

On the other hand, as shown in FIG.
It is connected to 1.

Note that the suction pipe 20 is provided with an on-off valve 22 in the middle thereof. Further, the stirring water tank 10 has a water receiving tank 23 disposed near the outer side thereof, and the water receiving tank 23 is connected to the stirring water tank 10 via a water supply pipe 25 equipped with a small discharge pump 24. .

Next, regarding the operation of the fluid stirring device having the above configuration,
This will be explained with reference to FIGS. 1 and 2.

First, after closing the on-off valve 22 provided in the suction pipe 20, water is filled into the stirring water tank 10 from the water receiving tank 23 via the water supply pipe 25, and a material such as bentonite is added to the inlet 11.
The slurry is poured into the stirring water tank 10 to form a slurry in the stirring water tank 10.

Then, after a certain period of time has elapsed after the addition, since hentonite and the like have a higher specific gravity than water, a part of it will be deposited on the bottom plate LOa of the stirring water tank 10 by gravity settling. Furthermore, if the slurry in the stirring water tank 10 is transferred to a construction site using a transfer pump or the like in this state, the slurry will be transferred in a non-uniform manner.

However, in this embodiment, when the on-off valve 22 provided in the suction pipe 2o is opened and the circulation pump 12 is activated,
The slurry in the stirring water tank 10 is sucked into the impeller casing 13 of the circulation pump 12 through the suction pipe 2o, and after passing through the discharge pipe 18, the slurry is vigorously pumped into the stirring water tank 1o through the plurality of jetting openings 19. It becomes every time it is squirted.

Therefore, the slurry in the stirring water tank 10 is agitated by the powerful ejection energy possessed by the ejected slurry.

In particular, when the spouting direction of the spout opening 19 is directed toward the sediment deposited below the stirring water tank 1o, the sediment can be sufficiently stirred and suspended upward, and the stirring water tank]
0 slurry can be stirred and mixed evenly throughout the entire area, including the upper and lower parts, the inner and outer peripheral parts, and a slurry with a uniform concentration can be formed.

Thereafter, by continuously circulating the slurry in the manner described above using the circulation pump 12, the slurry concentration can be made even more uniform.

Further, in this embodiment, a plurality of jetting openings 19 are provided at intervals in the circumferential direction, and each jetting opening 19 jets the slurry into the stirring water tank 10 in a tangential direction from the outer peripheral wall of the stirring water tank 10. As a result, a vortex can be formed in the stirring water tank 10, and from this point of view as well, the uniformity of the slurry concentration can be improved.

In the above embodiment, a plurality of ejection openings 19 are provided, but a single number may be provided, and although the water receiving tank 23 is provided close to the stirring water tank 10, it may also be provided far away. Furthermore, water can also be supplied to the stirring water tank 1o from another water supply source.

Another embodiment is shown in FIG. 5 and FIG. 6, and in this embodiment, the circulation pump 12 has only one discharge port 17, and after making the slurry uniform in concentration, the same circulation pump 12
The slurry is characterized by being configured so that it can also be used as a transfer pump to transfer the slurry to the construction site, etc.

That is, as shown in FIGS. 5 and 6, the circulation pump 12
The outer periphery of the impeller casing 13 has a single discharge
17 is provided, and one end of a single discharge pipe 18 is connected to the discharge port 17 for communication.

The other end of the discharge pipe 18 is connected to an annular distribution pipe 30 installed in a ring shape at the top of the stirring water tank 10. ,
It is connected to a plurality of ejection pipes 31 extending downward along the inner surface of the stirring water tank 10, and each ejection pipe 31 is formed with an ejection opening 19 at its lower end.

With this configuration, even when there is a single discharge port 17, it is possible to achieve uniformity of slurry concentration similar to when there is a plurality of discharge ports 17.

In addition, in this embodiment, the transfer pipe 32 branches from the middle part of the discharge pipe 18 in a T-shape, and on-off valves 33 are provided at the parts of the discharge pipe 18 and the transfer pipe 32 adjacent to the branch part. □34 are provided.

With this configuration, the on-off valve 34 provided in the transfer pipe 32
If the circulation pump 12 is operated after opening the on-off valve 33 provided in the discharge piping 18 while closing the discharge pipe 18, the slurry will be circulated between the stirring water tank 10 and the circulation pump 12 in the manner described above. Stir the slurry in 10 to make the slurry concentration uniform.

Thereafter, by opening the on-off valve 34 provided on the transfer pipe 32 and opening the on-off valve 33 provided on the discharge pipe 18, the circulation pump 12 is activated and the slurry is circulated between the stirring water tank 10 - suction pipe 20 - circulation. Pump-discharge piping 18-branch part A
It is transferred to a desired construction site through the m transfer pipe 32.

Further, as shown in FIG. 7, the annular distribution pipe 30 can be installed below the inner surface of the stirring water tank 10, and in this case, the spout pipe 31 can be made unnecessary.

Furthermore, as shown in the figure, if a rotary cutter 40 that rotates integrally with the impeller 13a is provided in front of the impeller 13a inside the impeller casing 13, the slurry can be cut into fine particles and the slurry concentration can be made uniform. Further improvements can be made.

As described above, this embodiment has the following effects.

■Since the circulation pump 12 that constitutes the main body of the fluid stirring device is placed outside the stirring water tank 10, if a failure occurs, the circulation pump 12 can be inspected and repaired on the spot, making maintenance extremely easy. become.

■Also, the circulation pump 12 that constitutes the main body of the fluid stirring device
Since it is arranged outside the stirring water tank 10, the watertight sealing mechanism of the circulation pump 12 can be of a simpler structure than when it is arranged inside the stirring water tank 10, and the fluid stirring device can be manufactured at a low cost. I can do it.

■Furthermore, the circulation pump 1 that constitutes the main body of the fluid stirring device
2 is placed outside the stirring water tank lO, the circulation pump 12 can be connected to the transfer piping 32 if necessary, so that the fluid stirring device has not only the slurry stirring function but also the slurry transfer function. This makes it possible to eliminate the need for a slurry transfer device.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the fluid stirring device according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is iIi! A front view of the i-ring pump, FIG. 4 is a view taken along the line 1-1 in FIG. 3, FIG. 5 is a plan view of another embodiment, FIG. 6 is a partially sectional front view of the same, FIG.
The figure is a partially sectional front view of a modified example. In the figure, A: Branch part 10: Stirring water tank 12: Circulation pump 16: Suction port 17: Discharge port 19: Spout opening

Claims (1)

[Claims] 1. A circulation pump (12) is installed outside the stirring water tank (10), and the lower part of the stirring water tank (10) is connected to the suction port (16) of the circulation pump (12).
A fluid stirring device characterized in that the discharge port (17) of item 2) is connected in communication with a jetting opening (19) opened in a stirring water tank (10).