JPS6157714A - Method and device for mixing ground improving chemical liquid - Google Patents

Abstract

PURPOSE:To continuously provide uniform mixture liquid, by a method wherein plural kinds of liquid chemicals and/or powder granular agent are fed to a trumpet-shaped mixing injection nozzle together with water, where necessary, so that they cross each other and collide with each other. CONSTITUTION:First chemical liquid is fed in given quantities through a convey pipe 4 for a tank 2 by means of a continuous weighing device 6, and is fed to a trumpet-shaped mixing injection nozzle 1 through a convey pipe 8 with the aid of a pump P1. Meanwhile, second chemical liquid is also fed to the nozzle 1 from a tank 3 through a convey pipe 5 and a continuous weighing device 7 with the aid of a pump P4. The first and the second chemical liquids are fed through injection nozzles 10 and 11 at such an angle that the two liquids cross each other and collide with each other within the nozzle 1, and they are uniformly mixed. After the mixed chemical liquids are collected to a tray 12, the mixture is fed with a pressure to an injection pipe 14 with the aid of a pump P3 to press in ground through an injection hole 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for continuously mixing soil improvement chemical solutions, and more specifically, to a method for continuously mixing a soil improvement chemical solution, and more specifically, a method for continuously supplying a plurality of types of liquid, powder, or granular chemical solutions while metering them. These materials are uniformly mixed together with water using a trumpet-shaped mixing jet nozzle if necessary.

(Industrial Application Field) The method and apparatus of the present invention inject a chemical solution into the ground through an injection pipe that enters the ground to improve poor ground conditions such as soft ground. It is used in industries to improve the ground by solidifying it.

(Technical background) It is necessary to mix the soil improvement chemicals continuously and uniformly. First, if the chemicals are not mixed continuously, the mixed chemicals will solidify quickly, solidifying inside the injection pipe, near the injection hole, or in the storage tank, making it impossible to perform the work smoothly. In addition, if the mixture is not uniform, the gel time will be uneven, resulting in more than the necessary amount of chemical solution being injected into the ground, which will be uneconomical, or in extreme cases, there will be areas where it does not solidify at all, which is inconvenient for construction work. arise.

Therefore, the method and device for mixing soil improvement chemicals are extremely important, and various methods have been considered so far.

(Prior Art) Some typical examples are as follows: (1) A mixing tank is provided with an integrated or separate rotary blade, which stirs and mixes the mixture. ■A mixing tank is installed and an air jet is blown into it to mix. ■Rotate the mixing tank itself. Mix by using a stirring plate (rod) with zero manual effort. There are other methods.

(Problems to be Solved by the Present Invention) In all of the above conventional methods (1) to (2), a certain amount of liquid medicine, drug, or water is placed in a mixing tank and mixed, so the mixing operation is discontinuous. Therefore, a separate storage tank is required for continuous injection, and the mixed chemical solution must be stirred to prevent it from solidifying even if it is poured into this storage tank, which requires equipment, space, and energy consumption. There is also a lot of waste in this regard. Furthermore, with the conventional techniques, it takes a long time to obtain uniform mixing, which is also a factor in reducing work efficiency. Therefore, in the present invention,
The problem to be solved is to provide a method and device for mixing soil improvement chemicals that can be quickly and uniformly mixed using simple equipment, which does not take up much space, and which is energy-saving.

(Means for Solving) In order to solve the above problems, the present invention uses a trumpet-shaped mixing jet nozzle to continuously spray predetermined amounts of multiple types of chemicals, agents, or water as needed for soil improvement. There, the chemical solution, drug, or water intersects and collides with each other, and due to the Coanda effect, these liquids are diffused along the inner wall of the trumpet-shaped mixing injection nozzle and become like rainwater, colliding with each other and mixing uniformly. The mixing effect of this trumpet-like mixing device is further improved if spiral protrusions or grooves are formed on the inner wall.

The soil improvement chemical solution mixed in this way is collected by a funnel-shaped saucer or the like, is forced into an injection pipe by a pump, and is injected into the ground through an injection hole.

(Effect) Since the present invention has the above configuration,
The simple equipment does not take up much space, and it is possible to continuously and uniformly mix medicinal solutions, medicines, or water. In particular, the method and apparatus of the present invention do not use rotating bodies such as rotary blades or stirrer plates, so there is no trouble caused by °°, and continuous supply is possible. Problems such as solidification and inability to be transferred were also resolved.Furthermore, according to the method and apparatus of the present invention, homogeneous mixing can be achieved in a short period of time, resulting in efficient and stable gel time. Therefore, the solidification of the chemical solution inside the injection tube or near the injection hole, which has often occurred in the past, is eliminated, and the inconvenience of the formation of areas where no solidification occurs is no longer caused.

(Example-1) A first embodiment of the present invention will be described with reference to FIG.

Figure 1 shows a case where two types of chemical solutions are mixed.The first chemical solution is passed from the first chemical solution tank (2) through the transfer pipe (4), and is accurately measured in predetermined amounts at a time by a continuous metering device (6). It is sent out and reaches the trumpet-shaped mixing injection nozzle (1) via the transfer pipe (8) by the pump (Pl).

On the other hand, the second chemical solution is also similar to the first chemical solution in the second chemical solution tank (
3) to the transfer pipe (5) through the continuous metering device (force) to the pump (
P2), a predetermined amount of the mixture is continuously and accurately supplied to the trumpet-shaped mixing injection nozzle (1). At this time, it goes without saying that in addition to these chemical solutions, water may also be supplied together if necessary. The above liquids are supplied from the jet holes (10) and (11) at angles such that they intersect and collide with each other in the trumpet-shaped mixing jet nozzle,
These liquids collide with each other and diffuse along the inner wall due to the Coanda effect caused by the inner wall of the trumpet-shaped mixing injection nozzle (1), so that they are mixed quickly and uniformly. Then, the mixed soil improvement chemical solution is poured into a funnel-shaped saucer (12
), etc., and pumped (P8) into the injection tube (
14) and injected into the ground through the injection hole (15).

(Example-2) A second embodiment of the present invention will be described with reference to FIG.

A powdered or liquid drug A and a granular drug B are fed into a drug supply tank (22) and a continuous metering supply device (f231), respectively.
261 and (27), the water is continuously and accurately supplied to the trumpet-shaped mixing injection nozzle (21) in a predetermined amount, and at the same time, water is supplied to the trumpet-shaped mixing injection nozzle (21) in fixed amounts from the water pipe (36). . At this time, these chemicals and water intersect with each other in the trumpet-shaped mixing injection nozzle (21) and are ejected from the injection ports (30), (31) at angles such that they collide with each other, are mixed, and are ejected into a trumpet-shaped mixing injection nozzle. Since the inner wall of the nozzle (21) has a trumpet shape, the liquid diffuses along the wall surface due to the Coanda effect, and both the A agent and the B agent are quickly dissolved in water and mixed uniformly. After that, the soil improvement chemical solution is collected by a funnel-shaped saucer (32, etc.), and is passed through a transfer pipe (33) by a pump (P6) to an injection pipe (34).
) injection hole (injected into the ground through the arm).

In this way, even with powdered or granular drugs, a uniform liquid mixture can be continuously obtained using a simple device that does not take up much space and saves energy.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the invention, and FIG. 2 is a schematic diagram showing another embodiment of the invention. l, 21 trumpet-shaped mixing injection nozzle 6, 7. ．． 2
6.27 Continuous metering supply device 12.32 Receiver 14.34... Injection pipe

Claims (1)

[Claims] 1) A method of continuously mixing soil improvement agents, in which a plurality of types of chemical solutions and/or powdered/granular agents are mixed with water as necessary so that they intersect and collide with each other. A method for continuously mixing a ground improvement chemical solution, wherein the chemical solution and/or the chemical and water are continuously and uniformly mixed within the trumpet-shaped mixing and injection nozzle. 2) Continuous mixing method for soil improvement chemicals, in which the chemicals and chemicals are continuously supplied in accurate amounts through a continuous measuring device, as set forth in claim 1. 3) Continuously mixing soil improvement chemicals The device has a device for supplying multiple types of chemical solutions and/or powdered/granular drugs, a device for supplying water as needed, and a trumpet-shaped mixing spray nozzle, and further comprises Or, when water is supplied to a trumpet-shaped mixing injection nozzle, a soil improvement chemical liquid continuous mixing device having a supply port that ejects the chemical liquid, medicine, or water at an angle such that the chemical liquid, medicine, or water alternately collides with each other 4) Claim 3 A continuous mixing device for soil improvement chemical solutions, wherein the device for supplying chemical solutions, chemicals, or water according to paragraph 1 includes a device that continuously measures and supplies predetermined amounts of chemical solutions, chemicals, or water.