JPH0340369Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improved two-component mixing injection gun for mixing and spraying two types of liquids, and particularly for mixing two types of liquids at a predetermined ratio. The present invention relates to a two-liquid mixing and spraying device that is capable of spraying, has excellent practicality, and has significantly improved operability.

[Conventional technology]

Conventionally, devices have been used to mix two types of liquids, such as a liquid agent that hardens upon contact with water, water, various liquid chemicals, or a foaming agent and urethane liquid, and spray or scatter the mixture at the same time. Pressure-fitting one liquid into the main pipe and injecting it from the nozzle at the tip; at this time, using the negative pressure formed in the nozzle cap, sucking the second liquid from the side pipe opened there; A gun device that mixes a first liquid and a second liquid in the negative pressure space and sprays and sprays the mixed liquid in the form of a mist is widely known.

A spraying device that utilizes such a principle of spraying normally uses a jet pump or the like to pressurize a first liquid into a main pipe, and mix and spray a second liquid at a nozzle portion. However, when the spraying operation is completed and stopped, for example, in the case of a solidifying liquid mixture, the reaction components of the liquid mixture existing in the nozzle will easily solidify and cause clogging. During use, the nozzle section must be cleaned each time, which is extremely troublesome.

As a solution to these inconveniences, the present inventor focused on the use of a three-way kettle, attached it to the side pipe for suctioning the second liquid, and rotated the kettle at the end of spraying and spraying the mixed liquid. We investigated a prototype method of injecting and ejecting air into the nozzle and nozzle when the suction of the second liquid was stopped. However, this method
It is possible to expel the liquid in the three-way kettle and nozzle to the outside of the device and prevent clogging due to solidification of the drug in the nozzle part, but the manual operation of the three-way kettle is usually not so smooth, and the two to be mixed are not easily operated.
It has been virtually impossible to precisely control the desired mixing ratio of the seed liquid each time.
In addition, even for the same purpose, the ratio of the first liquid and the second liquid is not always constant, and the viscosity of each liquid also varies, so the side pipe that supplies the second liquid has the same amount as the first liquid in the main pipe. Controlling the aperture on three sides is not practical, and
Even if it could be adopted, the three-way kotuku would not be desirable for practical purposes.

[Problem that the invention attempts to solve]

In view of the above-mentioned circumstances, the present invention aims to provide a device that is further improved in practical terms. That is, an object of the present invention is to be easy to operate, to be able to mix and spray while keeping the desired ratio of the first liquid and the second liquid to be mixed stable, and to be able to clean the nozzle etc. upon reuse. To provide a device that does not require any complicated handling.

[Means for solving problems]

The inventor of the present invention has conducted further trial production research on methods and devices for solving the above problems, and as a result, has developed a device that is extremely desirable for practical purposes.

That is, in the present invention, a main pipe for guiding the first liquid to be pumped is attached to the upper end of the gripping part, and an injection nozzle part having a two-liquid mixing chamber at the tip is attached to the tip of the main pipe. The injection nozzle member includes
A two-component mixing spray gun including a manual switching valve that can suck and supply a second fluid into the two-component mixing chamber via a side pipe, the switching valve having two holes that are selectively opened. and in a first state in which the operating lever manually operated in the grip part is opened, the first hole of the valve communicates with the outside air,
An operation configured such that in a second state in which the operating lever is pulled toward the grip, the first hole of the valve is closed and the second hole communicating with the conduit for guiding the second liquid is open. To provide a two-component mixing and spraying device with improved properties.

Therefore, the valve used in the device of the present invention is preferably composed of an outer bottomed cylindrical body and an inner bottomed cylindrical body that fits inside the outer cylindrical body and can reciprocate in the axial direction in an airtight manner. Two through holes parallel to the axis and at different intervals are formed in the wall of each cylinder, and each corresponding hole is selected by relative movement of both cylinders. The structure is such that a state of communication is established between the two.

Further, the two-component mixing and dispersing device of the present invention includes a nozzle member that is provided with a collision surface member that is integrally formed in a receiving shape at the tip of the main body that extends along the injection direction from the injection side opening of the nozzle. is conveniently used.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to the accompanying drawings.

Fig. 1 is a partially cutaway side view of an example of a two-component mixing and spraying device according to the present invention, Fig. 2 is a cross-sectional view including the shaft of an example of an automatic switching valve used in the device of the present invention, and Fig. a shows the valve. Figure b shows the first state, and Figure b shows the second state.

The spray gun shown in FIG. 1 includes a grip part 1, an operating lever 2, a main pipe 3 into which a first liquid is press-fitted and which guides the liquid to a jetting part, and a spray nozzle member attached to the tip of the main pipe 3 via an attachment 4. 5 is attached to the attachment 4, and a side pipe 6 for guiding the second liquid is attached to intersect with the main pipe 3, the opening of which is a guide opening into the central cavity 8 in the nozzle member 5 into which the main pipe line 7 opens. It is configured to communicate with the hole 9. An automatic switching valve 10 is attached to the side pipe 6 near its attachment portion. The valve 10 is connected to the operating lever 2 via a connecting member 11. The main pipe 3 that guides the first liquid is usually connected to the gun grip 1
It communicates with the first liquid introduction hole formed inside.
By pulling the lever 2 toward the grip, a previously closed on-off valve (not shown) opens, and the first liquid pumped by the compressor is guided to the main pipe 3 through the introduction hole 12 and jetted out from the nozzle.

As shown in FIG. 2, when the valve 10 is in the first open state (FIG. The first hole 15 formed on the bottom plate side of the bottomed cylindrical body 13 and the first hole 15' on the opening side of the inner bottomed cylindrical body 14, which is biased toward the opening side by the spring S, are in communication. Then, when the operating lever 2 is pulled toward the grip part against the bias of the spring S, a second state is reached in which the respective second holes 16 and 16' on the opening side communicate with each other (Fig. b ) is formed. Push the operating lever 2 into the grip part 1
When pulled to the side, the first liquid is ejected and, due to the reduced pressure thereby created in the cavity 8 in the nozzle member, the second liquid is discharged through a pipe (not shown) connected to the second hole 16. The liquid is sucked into the side pipe 6 and forcibly mixed with the first liquid in the central cavity 8 of the nozzle member 5 or the nozzle, and the mixed liquid is sprayed in the form of mist.

The device of the present invention allows the second liquid volume to correspond to the flow rate of the first liquid flowing through the main pipe 3 without having to individually manually adjust the second liquid volume with respect to the first liquid volume at the start of operation. The feature is that the second hole 16,1 of the valve can be set in advance.
The opening formed by 6' is linked to the operation of the operating lever to automatically adjust the flow rate of the second liquid. In other words, the supply amount of both the first liquid and the second liquid is simultaneously controlled by the operating lever, and the ratio of the second liquid amount to the first liquid amount is determined by the connecting member 11 attached to the operating lever. It can be set in advance by adjusting the length. The length can be adjusted, for example, by using a nut 1 attached to the thread 17 at the end of the connecting member 11 through a through hole formed in the operating lever 2.
It can be done easily depending on the tightness in step 8.
The optimum conditions can be readily determined through simple preliminary trials. In this case, the other end of the connecting member 11 is connected to a protrusion 19 that is integrally attached to the bottom plate of the cylindrical body 14 inside the valve 10. However, the relative movement between the inner cylinder 14 and the outer cylinder 13 of the valve 10, in other words,
The means for converting the valve 10 between the first state and the second state may be any conventionally known method that can be used automatically in conjunction with an operating lever.

Further, in the apparatus of the present invention, any conventionally known nozzle may be used, but the one shown in the drawings is preferred.

[Effect of idea]

The gun-type two-component mixing and spraying device of the present invention is extremely easy to operate and maintains a stable mixing ratio of the two components. Not only can it be sprayed at a mixed ratio, but the two-component mixture is performed in the two-component mixing chamber at the tip of the injection nozzle member.
It has high practical value in that cleaning of the nozzle for reuse can be carried out extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an example of the device according to the present invention, and FIG. 2 is a sectional view including the axis of an example of an automatic switching valve used in the device of the present invention. Symbols in the figure: 1...Gripper, 2...Operation lever, 3...Main pipe, 5...Nozzle member, 6...Side pipe, 10...Valve.

Claims (1)

[Claims for Utility Model Registration] 1. A main pipe for guiding the first liquid under pressure is attached to the upper end of the gripping part, and an injection nozzle member having a two-liquid mixing chamber at the tip is attached to the tip of the main pipe. A two-component mixing spray gun is provided with a manual switching valve attached to the injection nozzle member via a side pipe for sucking and supplying a second fluid to the two-component mixing chamber, the switching valve being a It has two holes that open all at once, and in a first state in which the control lever manually operated in the grip part is open, the first hole of the valve communicates with the outside air, and the control lever is held in the grip. In the second state where the valve is drawn toward the side, the first hole of the valve is closed and the second hole communicating with the conduit for guiding the second liquid is opened. Two-component mixing spray device. 2 The above-mentioned valve is composed of an outer bottomed cylinder and an inner bottomed cylinder that fits inside the outer cylinder and can reciprocate airtightly in the axial direction, and the cylinder wall of each cylinder includes:
Two through holes are formed parallel to the axis and at different intervals, and the corresponding holes are selectively brought into communication by relative movement of both cylinders. The device according to claim 1 of the utility model registration claim. 3 In the above-mentioned valve, the inner bottomed cylindrical body is normally negatively biased by a spring in the opening direction of the nozzle side opposite to the bottom plate side, forming the first state, and the above-mentioned operation lever is pulled. The device according to claim 2, which is configured to move toward the bottom plate side by shifting to form the second state. 4. Utility model registration claim 1, wherein the injection nozzle member is provided with a collision surface member integrally formed in a receiving shape at the tip of the main body extending from the injection side opening of the nozzle along the injection direction. Apparatus described in section.