JPH0448857Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a tank used for producing, stirring, and pumping additive liquid when spraying fireproof castables.

[Conventional technology]

In the case of ordinary spraying materials, a binder is mixed into the spraying material in powder form, and water is used as the liquid added to the nozzle during spraying. Alternatively, a method of adding part or all of the binder as a solution through a nozzle has also been conventionally used. This is a curing binder for wet spraying, such as sodium silicate for acid-resistant castables.

Figure 2 shows a cross-sectional view of a tank used in the production of conventional binder liquid. 1 is a tank for pooling binder liquid, 2 is a dissolving and mixing tank, and valve 4 is opened from water inlet 3 to supply water. Insert the required amount. The water amount is controlled by a liquid level gauge 5.

Next, the binder is put into the solution mixing tank 2 and stirred with an agitator 6 to reach the desired concentration.
The agitator 6 is a small and easy-to-handle one driven by an air motor, and 7 indicates the air piping for the air motor. The dissolved binder liquid falls into the tank 1 through a strainer 8 for removing undissolved substances and is pooled.

Reference numeral 9 indicates a pump, in which the binder liquid pooled in the tank 1 is sucked up through a suction pipe 10 and sent to a spray nozzle (not shown) through a solution supply port 11.

On the other hand, in order to stabilize the amount of added liquid supplied to the nozzle, the pump 9 has a discharge capacity of 5 to 20 times the amount of added liquid, and most of the solution is passed through the circulation circuit pipe 12. It is refluxed into tank 1.
13 is a relief valve, which functions to keep the pressure on the side of the solution supply port 11 to the nozzle constant, and 14 is a pressure gauge for confirmation. 15 indicates a pump operation panel.

The case where the binder is dissolved in water or its concentration is adjusted has been described above, but binders prepared in liquid form, such as sodium silicate, are directly put into the tank 1.

[Problem that the invention attempts to solve]

In conventional tanks such as those mentioned above, with easily soluble substances such as silicate soda, once mixed, the water and binder will not separate due to sedimentation, etc.
Slightly soluble binders such as slaked lime settle in the tank, causing variations in blended concentration.

Therefore, when used as a curing binder in spray construction, the curing speed is slow, the adhesion rate of the spray material decreases, and sag occurs, which adversely affects the quality of the construction body.

[Means for solving problems]

The spray binder tank according to this invention has a circulating circuit pipe extended and connected to a pipe with a large number of pores provided at the bottom of the tank (hereinafter referred to as "circulating pore pipe").

[Effect]

In this device, the circulating liquid is ejected from the pores of the circulation pore tube, and the agitation force generated by the water flow prevents the binder in the solution from settling.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of this invention, and numerals 1 to 15 are the same as the conventional device described above. A circulation pore tube 16 is an extension of the conventional circulation circuit tube 12 and has a large number of pores 17 extending from the bottom of the tank.

The number and diameter of the pores 17 are determined by the capacity of the pump and the shape of the tank. As a result of experiments, it was found that the ejection speed should be 5 m/sec or more and the pore pitch should be 100 mm or less.

In the case of this example, the pump discharge capacity is 100/
min, tank dimensions are length 1000mm x depth width 600mm x
The height was 700 mm, and a total of 20 pores with a diameter of 4 mm were provided in two rows with a pitch of 100 mm in a staggered pattern.

[Effect of idea]

As explained above, the inventors of this idea focused on the fact that most of the solution discharged from the pump circulates into the tank, and created a simple structure in which the circulation circuit tube was extended and the solution was ejected from the pores. The uniformity of the concentration of the binder solution, which is soluble and undergoes sedimentation separation, improves the adhesion rate of the sprayed material, reduces the occurrence of sag, improves the smoothness of the sprayed surface, and improves the quality of the construction object. This has the effect of improving and making it more uniform.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, and FIG. 2 is a sectional view showing a conventional binder tank. In both figures, 1...Tank, 2...Dissolution mixing tank, 6...Agitator, 9...Pump, 10...
...Suction pipe, 12... Circulation circuit pipe, 16... Circulation pore tube, 17... Pore.

Claims (1)

[Scope of utility model registration request] A tank 1 for storing a binder mixed liquid, a dissolving and mixing tank 2 that supplies the binder mixed liquid into the tank 1 from above, and a suction pipe 10 from the bottom of the tank.
a pump 9 that sucks up the binder mixture through the pump and discharges it to the supply port 11 to the outside;
A spraying binder tank is equipped with a circulation circuit pipe 12 for branching and circulating a part of the binder mixture sent from the tank 1 to the supply port 11 into the tank 1. 1
A spray binder tank characterized in that a circulation pore pipe 16 having a diameter of 7 is disposed, and the circulation circuit pipe 12 is connected to the circulation pore pipe 16.