JPH0592029A - Minute foam generating nozzle - Google Patents

Abstract

PURPOSE:To generate minute foam by executing a pressure reduction of a liquid obtained by pressurizing and dissolving gas. CONSTITUTION:A flow passage 12 of a prescribed cross section formed at the time when a valve seat 10 and a valve body 11 are allowed to abut on each other is provided. When a liquid passes through this narrowed-down flow passage 12, a large quantity of minute foam is generated stably. Also, in the case refuse adheres to the flow passage 12, the adhering refuse can be allowed to flow to the downstream side by opening the valve body 11. In such a way, refuse does not collect, and a large quantity of minute foam can be generated extending over a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine bubble generating nozzle for generating fine bubbles in a water tank.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a fine bubble generating nozzle of this type has a structure in which a fine bubble generating nozzle 1 is provided to decompress a liquid in which a gas is pressurized and dissolved to generate fine bubbles. A pressure reducing plate 3 having holes 2 formed therein and a net 4 provided downstream thereof. Then, the liquid is applied to the pressure reducing plate 3 and then to the net 4.
Fine bubbles are generated by passing through the passage (Japanese Patent Laid-Open No. Sho 63-63).
No. 283772).

Another conventional fine bubble generating nozzle is shown in FIG. In the figure, in order to generate fine bubbles by decompressing a liquid in which gas is pressurized and dissolved, a valve body 7 that is opened and closed by the pressure inside the discharge conduit 6 of the fine bubble generation nozzle 5 and the valve body 7 are energized. A relief valve 9 composed of a spring 8 is provided. Then, when the internal pressure of the liquid passing through the discharge conduit 6 reaches a predetermined pressure, the relief valve 9 opens and fine bubbles are generated (Japanese Patent Publication No. 3-14464).

[0004]

However, in the above structure (Japanese Patent Laid-Open No. 63-283772), it takes time to generate fine bubbles using the pressure reducing plate 3 and the plurality of nets 4. It was In addition, since the water flow collides with the net from the holes of the pressure reducing plate 3, dust is accumulated in the net, and the ability to generate fine bubbles gradually decreases.

Another conventional configuration (Japanese Patent Publication No. 3-144)
No. 64), fine bubbles are generated in the gap between the relief valve and the inside of the discharge pipe, but the gap between the inside of the discharge pipe and the valve body is constant due to the flow of water flowing in the discharge pipe. However, there is a problem in that fine bubbles are not stably generated and are not generated.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fine bubble generation nozzle capable of ensuring the performance that a large amount of stable fine bubbles are generated for a long period of time without dust accumulation. is there.

[0007]

In order to achieve the above-mentioned object, the present invention provides a bubble generator for generating bubbles by depressurizing a liquid in which a gas is dissolved under pressure, which is provided in a portion through which the liquid passes. Between the valve seat, the valve body provided facing the valve seat, the opening / closing means for opening and closing the valve body, and the valve body and the valve seat when the valve body and the valve seat come into contact with each other. And a flow path for generating fine bubbles to be formed.

[0008]

According to the present invention, when the valve body and the valve seat are brought into contact with each other, when the liquid water in which the gas is pressurized and dissolved passes through the flow path, the liquid is abruptly generated because the fine bubbles are formed. It is decompressed to generate fine bubbles.

Further, even if dust adheres to the flow path for generating fine bubbles formed when the valve body and the valve seat are closed, the valve body is opened by the valve opening / closing means and the adhered dust is on the downstream side. Be washed away.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1-3, 10 is a valve seat, and 1
Reference numeral 1 denotes a valve body that opens and closes facing the valve seat 10. 12
Is a flow passage having a constant cross-sectional area which is formed when the valve seat 10 and the valve body 11 come into contact with each other and generates fine bubbles. Thirteen
Is a bubble ejection nozzle, and is provided with a bubble ejection port 14. Reference numeral 15 is an opening / closing means provided between the bubble jetting nozzle 13 and the valve shaft 16 integrated with the valve body 11, and provided with a screw portion 17 for opening / closing the valve seat 10 and the valve body 11. Reference numeral 18 denotes a pipe line 18 formed when the valve seat 10 and the valve body 11 are opened by the opening / closing means 15. Arrows 19 and 20 respectively show the flow of water amount when the valve body 11 is closed and when it is opened.

Next, the operation of the above configuration will be described. The liquid obtained by pressurizing and dissolving air first collides with the valve seat 11. Subsequently, the flow path 1 formed when the valve seat 10 and the valve body 11 contact each other
Pass 2. Then, when passing through the narrowed flow path 12, the pressure is rapidly reduced to generate fine bubbles. Further, the liquid vigorously passes through the flow path 12 and collides with the end portion of the flow path and the inside of the bubble jetting, whereby more fine bubbles are generated and jetted from the bubble jet port 19. However, since the flow passage formed by abutting the valve seat 10 and the valve body 11 is a flow passage having a minute cross-sectional area, when fine bubbles are generated, dust is accumulated in the flow passage 12 and stable ejection of the fine bubbles is possible. Hinder. In such a case, the valve body 11 is rotated by the screw portion 17 of the opening / closing means 15 provided between the bubble jetting nozzle 13 and the valve shaft 16 and separated from the valve seat 10 to form the pipe line 18, The dust can be ejected from the ejection port 19 to eliminate the dust clogging. Further, the threaded portion 17 of the opening / closing means 15 is attached to the valve shaft 16
It can be easily cleaned by being integrated with.

[0012]

As is apparent from the above description, the following effects can be obtained by the fine bubble generating nozzle of the present invention.

Since a fine air bubble is generated by utilizing the flow path for generating the fine air bubble formed when the valve body and the valve seat are in contact with each other, a large amount of the fine air bubble can be stably generated. In addition, dust that has adhered to the flow path when the valve body and valve seat are in contact with each other can be separated and flowed downstream by opening the valve body by the opening / closing means to form a new pipeline. it can. Therefore, it is possible to secure the performance of generating fine bubbles for a long period of time without collecting dust in the flow path.

[Brief description of drawings]

FIG. 1 is a sectional view of a fine bubble generating nozzle according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which a valve body of the same device is opened to form a new pipe line.

FIG. 3 is an external perspective view of a valve body and a valve seat of the same device.

FIG. 4 is a sectional view of a conventional fine bubble generating nozzle.

FIG. 5 is a sectional view of another conventional fine bubble generating nozzle.

[Explanation of symbols]

 10 valve seat 11 valve body 12 flow path 15 opening / closing means 18 conduit

Claims (1)

[Claims] 1. A bubble generator for generating bubbles by decompressing a liquid in which a gas is pressurized and dissolved, and a valve seat provided in a portion through which the liquid passes, and a valve seat provided opposite to the valve seat. Valve body, an opening / closing means for opening and closing the valve body, and a flow path for generating fine bubbles formed between the valve body and the valve seat when the valve body and the valve seat are in contact with each other. A fine bubble generation nozzle consisting of.