JPH03296426A - Method and device for adding liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and an apparatus for adding and mixing a smaller amount of liquid agent into a main liquid flowing through a main flow pipe than in an additive liquid pipe.

[Conventional technology]

For example, when spraying herbicides or insecticides on golf courses, it is common practice to spray an aqueous solution containing a small amount of the herbicide or other chemical in the spray water using a water sprinkler such as a sprinkler.

Normally, when spraying water mixed with other chemicals, if the spray water is small, the chemicals can be mixed into the stored water in advance to form a mixed solution, and then water can be sprayed by pump pressure. However, when a large amount of water is being sprayed, there are problems with the storage equipment, etc., so a method is adopted in which an additive liquid pipe is joined in the middle of the pipe of the sprayed water that is directly pumped up from a well etc., and the liquid agent is mixed in. ing.

On the other hand, as a related technology regarding a device for mixing two liquids,
Although the fields of application are different, in Japanese Patent Publication No. 1-15652, liquid A, which is made by mixing cement and china clay with some foaming agents and stabilizers and mixed with water, and liquid B, an aqueous silicic acid solution as a mortar instant setting aid, are respectively used. An apparatus is disclosed in which the fluids are independently pumped through conduits and merged at the tip of the inlet.

The aforementioned self-disclosing device has an inner tube through which the B liquid flows concentrically connected to an outer tube through which the A liquid flows, and is equipped with a flow rate adjusting means at the tip of the inner tube to uniformly mix the A liquid and the B liquid. In addition, the mixing ratio can be easily adjusted.

[Problem to be solved by the invention]

However, the mixing rate of the liquid agent in the spray water is 0°05~
Since the amount is extremely small at 0.2%, it is difficult to mix uniformly even if the liquid agent is poured into the stored water in advance and mixed as described above, and mixing equipment is required. Therefore, the most effective and rational method for uniformly mixing liquids, as in the disclosed technique, is to combine and mix the liquids that are independently transported through pipes in intermediate passages.

However, even during the confluence mixing, it is difficult to continuously mix a very small amount of the liquid agent into the main stream at a constant low concentration.

Furthermore, the prior art disclosed above is an effective method when the Ati and B solutions are mixed at a considerable ratio, but when a very small amount of the solution is mixed in the spray water, such as in the case of an aqueous solution of a herbicide or other chemical agent, It is unsuitable if it is contaminated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method and an apparatus for uniformly mixing a very small amount of an additive liquid into the main stream flowing through the main stream through a joined additive liquid pipe.

[Means to solve the problem]

The problem is that, in terms of method, for the main pipe where the main stream flows,
The additive liquid pipes for flowing the additive liquid are connected and communicated with each other, and the additive liquid is pumped at a pressure higher than the main flow pressure by a liquid injection means provided in the middle of the communication path of the additive liquid pipe. This can be solved by injecting it towards the communication hole of the main stream pipe and making it merge into the main stream.

In addition, the device is composed of an additive liquid pipe that communicates with the main flow pipe, and a liquid injection means provided in the middle of the communication path in the additive liquid pipe, and the additive liquid is communicated with the main flow pipe by the liquid injection means. This can be solved by configuring it so that it is injected toward the hole and merges into the main stream.

[Effect]

In the present invention, an additive liquid pipe for flowing an additive liquid agent is connected to a main flow pipe through which the main flow flows, and the additive liquid pipes are connected to each other, and the liquid agent flowing from the additive liquid pipe to the main flow pipe is connected to the additive liquid pipe. A liquid agent injection means provided in the middle of the passage injects the liquid toward the communication hole at a pumping pressure higher than that of the main stream, and joins the main stream.

Therefore, it is possible to continuously mix a very small amount of the liquid agent, and the pressure of pumping the liquid agent causes turbulence in the main flow flowing through the main flow pipe, so that the liquid agent and the main flow are effectively mixed and stirred. Note that unless the pressure for feeding the additive liquid is higher than the water pressure of the main flow, backflow will occur, so the additive liquid cannot be mixed. Therefore, in order to effectively mix and stir the liquid agent and the main stream, a pressure higher than that of the main stream is required, and preferably 1. The pumping pressure is twice or more, more preferably twice or more.

[Specific structure of the invention]

Hereinafter, the present invention will be explained in detail based on specific examples shown in the drawings.

Reference numeral 6 denotes a main flow pipe through which a large amount of main flow such as spray water flows, and a very small amount of liquid agent is mixed into the main flow flowing through this main flow pipe 6 by the mixing device 1 of the present invention.

The mixing device 1 is connected to the main flow pipe 6 through a connection device called a saddle valve 5. The saddle valve 5 consists of a connecting pipe 20 and a band-type holding device 21 for the connecting pipe 20, as shown in FIG. The holding device 21 has flanges 21a, 21 formed on divided pieces 21A, 21B of a ring-shaped band band divided into halves.
It is fastened with the fastener 22 at point a, and is fixed to the main pipe 6. Half portion 21 of the holding device 21
A and the connecting pipe 20 are integrally fixed, and the pipe line of the connecting pipe 20 communicates with a communication hole 6a formed in the main pipe 6.

Note that the valve 22 provided on the side surface of the connecting pipe 20 is a valve for blocking the mixing of chemicals, and for example, when the present device 1 is installed in a main pipe that is already installed underground. After installing the saddle valve 5, the valve 22 is kept closed when the communication hole 6a is formed in the main pipe 6 from the upper opening of the connecting pipe 20 by a drill or the like, and then the device of the present invention is closed. 1, the valve 22 can be opened to mix in the liquid. Therefore, the installation process of the saddle valve 5 and the installation process of the wooden ff1l can be carried out independently, and the water liquid can also be sprayed during this process. This is convenient for construction.

Next, the mixing and merging device 1 of the present invention will be explained in detail.

The device 1 of the present invention includes an additive liquid pipe 4, a liquid agent injection unit 2, and an injection nozzle 3. The liquid agent injection unit 2 is a device for guiding the liquid agent that is force-fed through the additive liquid pipe 4 to the position of the injection nozzle 3, and communicates with the communication hole 6 formed in the main flow pipe 6 by the injection nozzle 3.
The liquid agent is sprayed toward a.

A through hole 4b through which the liquid injection unit 2 is inserted is formed at the tip of the additive liquid pipe 4, and an extremely small diameter liquid flow path 4a is formed toward the inner space of the through hole 4b. ing. The inner diameter of the liquid agent flow path 4a is considerably smaller than the inner diameter of the general flow path 4c of the additive liquid pipe 4 in order to increase the liquid pressure.

The liquid injection unit 2 is composed of a threaded part 2a for fixing to the additive liquid pipe 4, a body part 2b and a cup part 2e that are inserted into the through hole 4b, and the lower side of the through hole 4b. The nut I is inserted into the through hole 4b.
Fixation to the additive liquid pipe 4 is achieved by fastening with O. On the other hand, the distal end of the cup portion 2e is threadedly connected to the connecting pipe 20 to form a flow path leading to the communication hole 6a of the main pipe 6. An annular groove 2c is formed on the outer periphery of the body part 2b in the circumferential direction of the body part 2b, which communicates with the liquid agent flow path 4a in the penetrating state and further communicates with an inner hole 2d formed inside the body part 2b. is formed. The injection nozzle 3 is screwed into the inner hole 2d using a screw groove formed on the inner circumferential wall thereof.

In the mixing and merging device 1 configured as described above, when the liquid is pumped by a pump or the like (not shown), the liquid passes through the channels 4c and 4a of the additive liquid pipe 4 and the annular groove 2c of the liquid injection unit 2, It is introduced into the hole 2d formed inside the unit 2, and the injection nozzle 3 is inserted into the main stream pipe 6.
It is injected toward the through hole 6a formed in the main pipe 6.
It mixes with the main liquid flowing inside. At this time, since the pressure of the main liquid flowing through the main pipe 6 is usually 4 to 61 g7cm2, the injection pressure of the liquid agent is at least higher than the pressure of the main liquid, but preferably the main liquid The pressure is 5 to 7-2 kg/cm2 or more, which is 1.2 times the pressure of the main liquid, and more preferably 8 to 12 kg/cm2 or more, which is twice the pressure of the main liquid.

Here, the relationship between the discharge pressure and discharge flow rate on the diameter side of the injection nozzle 3 is shown in FIG. In FIG. 3, the vertical axis shows the discharge pressure P (kg/co+2), and the horizontal axis shows the discharge amount Q (cc/5 inch). The test was performed using nozzle diameter φ
Two cases of 0.3 mm and φ0.5 mm were tested. Therefore, when selecting the injection nozzle diameter, first determine the mixed concentration of the liquid agent, and then determine the discharge flow rate and discharge pressure of the additive liquid relative to the flow rate and water pressure of the main liquid. Determine the axis position. Once the plot position on the drawing is determined, the injection nozzle diameter is determined by the two diameters of φ0.3mm and φ0.5mm.
A predetermined nozzle diameter is determined by proportional calculation based on case data.

Note that 7 is an on-off valve provided in the middle of the additive liquid pipe 4, and the on-off valve 7 can stop the mixing of the liquid mixture as necessary.

Normally, watering by a sprinkler or the like is branched from one main pipe to multiple branch pipes as shown in Fig. 4, and watering is performed by a sprinkler 9 installed at the terminal. It is desirable to install it in the middle of the main pipe before it is installed.

In addition, an on/off valve 8 is provided in the middle of the branch pipe.
Part of the watering can be stopped if necessary.

Further, if the valves 7.8 provided in the intermediate passage of the additive liquid pipe 4, the main pipe 6, etc. are remotely controllable valves such as electromagnetic valves, it is possible to centrally and automatically control water sprinkling and mixing of liquid agents. , watering and liquid spraying can be performed efficiently without the need for manpower.

〔Effect of the invention〕

As described in detail above, according to the present invention, a very small amount of liquid agent can be mixed into the main flow flowing through the main flow pipe at a constant, uniform, and low concentration.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a liquid agent mixing and merging device according to the present invention, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a diagram showing the relationship between discharge pressure and discharge flow rate for each injection nozzle diameter. The diagram shown in FIG. 4 is a flow path system diagram of the watering equipment. ... Injection nozzle, 4... Additive liquid pipe, 5... Saddle valve, 6... Main flow pipe, 7-... Valve, 8-... On/off valve, 9... Sprinkler.

Claims (2)

[Claims] (1) Additive liquid pipes for flowing the additive liquid are connected to the main pipe through which the main liquid flows and are communicated with each other, and the additive liquid is supplied by a liquid injection means provided in the middle of the communication path of the additive liquid pipe. A method for mixing a liquid agent, characterized in that the liquid agent is injected toward the communication hole of the main flow pipe at a pumping pressure higher than the pumping pressure of the main liquid to merge with the main liquid. (2) Consisting of an additive liquid pipe that communicates with the main flow pipe and a liquid injection means provided in the middle of the communication path in the additive liquid pipe, the additive liquid is directed toward the communication hole of the main flow pipe by the liquid injection means. A liquid agent mixing device characterized in that the liquid agent is configured to be jetted and merged with the main liquid.