JP2013184152A - Gas-liquid mixing t-joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-liquid mixing T-joint in which a high-pressure fluid is mixed with another high-pressure fluid to form a jet stream and from the tip nozzle of which a high-speed/high-pressure mixed fluid is made to spout.SOLUTION: A gas-liquid mixing T-joint 1 is configured so that an inside piece 8 is superimposed and inserted into a T-joint body 5 from the downstream side thereof, an engaging screw hole 4 of the T-joint body 5 is made coincident with a tilt cut end 7 of the inside piece 8, and then, a screw part 13 of a large-diameter inner peripheral part 9 of a forcibly feeding pipe 11 is screwed into another screw part 13 of a small-diameter outer circumferential part 3 of the T-joint body 5 to hold a circular projection 6 of the inside piece 8 between a stepped part 15 of the forcibly feeding pipe 11 and the downstream-side open end of the T-joint body 5. The high-pressure fluid such as water, which is supplied from the upstream side of the T-joint body 5 (the right side of Fig.1), is merged, at a position of the inside piece 8, with the high-pressure fluid which contains a grinding material such as a metal particle and a sand particle and which is supplied from a high-pressure air pipeline 12.

Description

  The present invention relates to a gas-liquid mixed cheese in which a high-pressure liquid and high-pressure air are mixed and a gas-liquid mixed fluid is sprayed from a tip nozzle.

Conventionally, there has been a polishing method and a polishing apparatus in which sodium chloride crystal grains collide with an object to be cleaned together with water as an abrasive (see Patent Document 1).
In this known technique, a mixed fountain flow is formed by mixing abrasive particles made of a large number of sodium chloride crystal grains with high-pressure water to be ejected, and immediately after the formation of the mixed fountain flow, dirt and paint on a base material such as a wall. The mixed fountain flow is made to collide at a high speed and peel off.
And what used the metal grain and the sand grain as the abrasives has extremely high collision energy due to the hardness and toughness of the abrasives, and has high polishing ability capable of peeling off the object to be polished in a short time. However, when the abrasive is made of metal particles or sand particles, due to its hardness, the inner surface of the pipe is severely scraped and damaged at the mixed fountain flow forming portion, resulting in a lack of durability.

There is also known a fluid mixer that is composed of a cheese joint and a jet pipe that can be manufactured at a low cost with a simple shape, and that is simply brazed by fitting the jet pipe into a fitting port of the cheese joint (see Patent Document 2). ).
In this known technique, a funnel-shaped jet pipe is provided in one of two ports opened in opposite directions on the same axis of a T-branched pipe body, and its tip is perpendicular to the port provided in the jet pipe. Projects into the opposite port beyond the port, pumps the fluid to the ejection pipe and ejects it to the opposite port, so that the other fluid supplied to the right-angled port is sucked to mix both fluids This is a fluid mixer.
However, this fluid mixer has a low strength and cannot be applied to a device in which a high-pressure liquid and high-pressure air are mixed and a gas-liquid mixed fluid is sprayed from a tip nozzle.

Conventionally, using a nozzle that mixes liquid and gas, called a two-fluid nozzle, and introducing a high-pressure gas into the two-fluid nozzle, an atomized gas that has been misted by the rapid expansion and diffusion of the high-pressure gas has been created. In addition, even when cooling with a small amount of cooling liquid, there is known a micromist generating method and apparatus for generating a micromist near a surface to be cooled by a pressurized gas and enabling efficient cooling over a wide range (Patent Document) 3).
In this known technique, liquid is sucked by a negative pressure when a pressurized gas for generating mist is ejected, and mist ejected from an air-fuel mixture outlet as a gas-liquid mixture is guided to an introduction pipe and conveyed, and an injection nozzle It is made to inject as micro mist from a plurality of injection holes after making it turn in the inside turning space. In this way, by providing the introduction pipe, it is possible to secure a time for the fine particles misted under the pressurized gas to dissolve the pressurized gas in the liquid, and to enhance the expansion effect of the pressurized gas dissolved inside during the injection. In addition to being able to enhance the formation of fine particles, the liquid can be uniformly dispersed by swirling the mist, and a wide range of cooling can be performed with a small amount of liquid and gas.
However, this micro mist generation method and apparatus thereof could not be applied to those in which a high-pressure liquid and high-pressure air are mixed and a gas-liquid mixed fluid is sprayed from a tip nozzle.

JP-A-10-291116 Japanese Utility Model Publication No. 5-44226 JP 2005-279562 A

  An object of the present invention is to provide a gas-liquid mixed cheese in which a high-pressure liquid and high-pressure air are mixed to create a jet flow, and a high-speed and high-pressure gas-liquid mixed fluid is sprayed from a tip nozzle.

  The gas-liquid mixed cheese of the present invention is a straight pipe made of a metal cylinder, a high-pressure liquid supply pipe is connected to the upstream opening end side, a step portion is provided on the downstream opening end side, and a small-diameter outer peripheral portion is formed, Furthermore, a cheese main body formed with a fitting screw hole penetrating to the inside in the middle of the body portion, and a cylindrical tube inserted into the inside of the cheese main body to form an inwardly tapered surface at the upstream opening end and at the downstream opening end An outwardly tapered surface is formed, an annular protrusion that engages with the downstream opening end of the cheese body is provided on the downstream opening end side, and the fitting screw hole position of the cheese body is at an angle of 40 to 50 °. It has a middle piece that forms an inclined incline that is inclined to the downstream side, and a large-diameter inner circumferential part that fits into the downstream-side small-diameter outer circumferential part of the cheese body, and the annular projection of the middle piece is located downstream of the cheese body Pumping tube with a small-diameter inner periphery sandwiched between the open ends and the cheese book Composed of a high pressure air pipe connected to the fitting screw hole.

The gas-liquid mixed cheese of the present invention is a straight pipe made of a metal cylinder, a high-pressure liquid supply pipe is connected to the upstream opening end side, a step portion is provided on the downstream opening end side, and a small-diameter outer peripheral portion is formed, Furthermore, a cheese main body formed with a fitting screw hole penetrating to the inside in the middle of the body portion, and a cylindrical tube inserted into the inside of the cheese main body to form an inwardly tapered surface at the upstream opening end and at the downstream opening end An outwardly tapered surface is formed, an annular protrusion that engages with the downstream opening end of the cheese body is provided on the downstream opening end side, and the fitting screw hole position of the cheese body is at an angle of 40 to 50 °. It has a middle piece that forms an inclined incline that is inclined toward the downstream side, and a large-diameter inner circumferential part that fits into the downstream-side small-diameter outer circumferential part of the cheese body, and the annular projection of the middle piece is arranged downstream of the cheese body. Pumping tube with a small-diameter inner periphery sandwiched between the open ends and the cheese book It is composed of a high-pressure air pipe connected to the fitting screw hole, reducing the pressure applied to the cheese body by the middle piece, preventing the cheese body from being destroyed, and if the middle piece is consumed, the pressure feeding pipe It can be easily replaced by removing it.
In addition, by changing the material of the middle frame, it is possible to maintain strength and take measures against passing heat of the abrasive and static electricity.

It is sectional drawing of the gas-liquid mixed cheese of this invention. It is a schematic explanatory drawing of a middle frame. It is a schematic explanatory drawing of a nozzle gun. It is a flowchart of a micro mist generator.

One embodiment of the gas-liquid mixed cheese of the present invention will be described below with reference to the accompanying drawings.
As shown in the sectional view of FIG. 1, the gas-liquid mixed cheese 1 of the present invention is a straight pipe made of a metal cylinder, and a high-pressure liquid supply pipe (not shown) is connected to the upstream opening end side, and the downstream side A cheese body 5 in which a stepped portion 2 is provided on the opening end side to form a small-diameter outer peripheral portion 3 and a fitting screw hole 4 penetrating to the inside is formed in the middle of the body portion, and the cheese body 5 is inserted into the inside of the cheese body 5 In the cylindrical tube, an annular projection 6 that engages with the downstream opening end of the cheese body 5 is provided on the downstream opening end side, and an inclined cut 7 is formed at the position of the fitting screw hole 4 of the cheese body 5 The top piece 8 has a large-diameter inner peripheral portion 9 that is fitted to the downstream-side small-diameter outer peripheral portion 3 of the cheese body 5, and the annular protrusion 6 of the middle piece 8 is connected to the downstream-side opening end of the cheese body 5. The high pressure connected to the fitting screw hole 4 of the said cheese main body 5 and the pressure feed pipe 11 provided with the small diameter inner peripheral part 10 to clamp. Made from the gas pipe 12.

  The cheese body 5 is a straight pipe made of a metal cylinder having a predetermined inner diameter, and has a threaded portion 13 on the outer periphery of the upstream opening end, and a high-pressure liquid supply pipe (not shown) is connected to the threaded portion 13. In addition, a stepped portion 2 is provided on the downstream opening end side to form a small-diameter outer peripheral portion 3, a screw portion 13 is formed on the outer periphery, and a fitting screw hole 4 penetrating to the inside is formed in the middle of the trunk portion of the straight pipe. .

As shown in the schematic explanatory diagram of FIG. 2, the middle piece 8 is a cylindrical tube with an outer diameter that is inserted into the cheese body 5 by polymerization, and is appropriately formed from a material such as a synthetic resin, metal, or ceramic according to the intended use. Then, an inwardly tapered surface 14 is formed at the upstream opening end, and an outwardly tapered surface 14 is formed at the downstream opening end.
And the annular processus | protrusion 6 engaged with the downstream opening end of the said cheese main body 5 is provided in a downstream opening end side, Furthermore, 40-50 degrees in the fitting screw hole 4 position of the said cheese main body 5 and optimally 45. An inclined cut 7 that is inclined toward the downstream side at an angle of about ± is formed.

The pressure feed pipe 11 has a large-diameter inner peripheral portion 9 that is fitted to the downstream-side small-diameter outer peripheral portion 3 of the cheese body 5, and has a screw portion 13 on the inner periphery. A small-diameter inner peripheral portion 10 is formed which continues to form the step portion 15 and sandwich the annular protrusion 6 of the middle piece 8 with the downstream opening end of the cheese body 5.
That is, the middle piece 8 is inserted into the inside of the cheese body 5 from the downstream side, and the screw portion 13 of the large-diameter inner peripheral portion 9 of the pumping tube 11 is replaced with the screw portion 13 of the small-diameter outer peripheral portion 3 of the cheese main body 5. By screwing, the annular projection 6 of the middle piece 8 is sandwiched between the stepped portion 15 of the pumping tube 11 and the downstream opening end of the cheese body 5. A high-speed jet stream that becomes a gas-liquid mixed fluid is blown out from the tip of the pressure feeding tube 11.

  The high-pressure air pipe 12 is provided with a screw portion 16 that is supplied with a high-pressure fluid such as an abrasive and is screwed into the fitting screw hole 4 of the cheese body 5 on the outer periphery. The fluid can be either gas or liquid.

Next, the assembly operation of the gas-liquid mixed cheese of the present invention will be described below based on the attached drawings.
Assembling the gas-liquid mixed cheese 1 of the present invention first inserts the middle piece 8 into the cheese body 5 from the downstream side, and inserts the fitting screw hole 4 of the cheese body 5 and the inclined cut end of the middle piece 8. 7, the threaded portion 13 of the large-diameter inner peripheral portion 9 of the pumping pipe 11 is screwed into the threaded portion 13 of the small-diameter outer peripheral portion 3 of the cheese body 5, and the annular projection of the middle piece 8 6 is sandwiched between the stepped portion 15 of the pressure feeding tube 11 and the downstream opening end of the cheese body 5. In addition, the position can be secured by notching both sides so that the position of the middle piece 8 does not shift during screw tightening.

The assembled gas-liquid mixed cheese 1 is supplied with a high-pressure fluid such as water from the upstream side of the cheese body 5 (the right side in FIG. 1), and contains a high-pressure air pipe 12 containing a polishing material such as metal particles and sand particles. The fluid is supplied and merged at the middle frame 8 position.
The high-pressure fluid containing abrasives such as metal particles and sand particles supplied from the high-pressure air pipe 12 at the position of the middle piece 8 passes through the inclined cut edge 7 of the middle piece 8 at an angle of 40 to 50 ° downstream. Is combined into a high-pressure fluid such as a high-speed and high-pressure gas-liquid mixed fluid and pumped.
The gas-liquid mixed fluid collides with dirt or paint attached to the object to be polished by a high-speed jet flow, and can remove the dirt or paint.

As shown in the schematic explanatory view of the nozzle gun in FIG. 3, a handle 17 is formed with a space in front and behind the lower part of the gas-liquid mixed cheese 1, and the rear handle 17 is also used as the high-pressure air pipe 12. While allowing high-pressure air to be supplied to the inside of the hand 17, a high-pressure liquid supply pipe 18 is connected to the upstream side of the gas-liquid mixed cheese 1. The air suction hole 19 is provided as necessary.
The high-pressure liquid supply pipe 18 is connected to the lower part of the tank 20 containing the abrasive material / media, the high-pressure air from the compressor 21 is supplied to the upper part of the tank 20, and the abrasive material / media is supplied from the lower part of the tank 20 to the above-mentioned tank 20. It is supplied to the upstream side of the gas-liquid mixed cheese 1.
On the other hand, high-pressure air is supplied from the compressor 20 to the upstream side of the handle 17 behind the gas-liquid mixed cheese 1 via the high-pressure air pipe 12.
The high-pressure air supplied from the high-pressure air pipe 12 at the position of the middle piece 8 shown in FIG. 1 is polished by a slanted cut 7 of the middle piece 8 at a downstream angle of 40 to 50 °, such as metal particles and sand particles. It is merged into a high-pressure liquid containing materials and pumped as a high-speed, high-pressure gas-liquid mixed fluid.
The gas-liquid mixed fluid collides with dirt or paint attached to the object to be polished by a high-speed jet flow, and can remove the dirt or paint.

As shown in the flow chart of the micro mist generator of FIG. 4, gas-liquid mixed cheese 1 that mixes high-pressure air and high-pressure liquid to form a gas-liquid mixed fluid, and a nipple 22 on the downstream side of the gas-liquid mixed cheese 1. And a T-type cheese 23 that branches the gas-liquid mixed fluid in two directions, a two-fluid nozzle 24 connected to the downstream side of the T-type cheese 23, and a connector to the two-fluid nozzle 24, respectively. The T-type comprises a nylon tube 25 having a cut or a hole at an appropriate position, a U tube 26 connected to the nylon tube 25, and a metal tube 27 connecting the U tubes 26, 26 to each other. A closed loop is formed by the cheese 23, the nylon tube 25, the U tube 26 and the metal tube 27.
The high-pressure air and the high-pressure liquid are introduced into the gas-liquid mixed cheese 1 through a pipe, and the high-pressure air is 40 to 50 ° by a middle piece 8 provided at a junction of the high-pressure air and the high-pressure liquid. The high pressure liquid joins at an angle of As a result, gas-liquid mixing can be performed smoothly, and a mist having an expected particle diameter can be obtained by adjusting the flow rate adjusting valve 28.
Further, the T-type cheese is provided with a two-fluid nozzle 24 divided into a nozzle hole having an opening at the tip and a nozzle chamber having a larger diameter than the nozzle hole through a diffuser having an inclined surface at the rear end of the nozzle hole. Since the fluid can be ejected at a constant pressure by installing it on the downstream side of 23, a fine mist can be produced.
Each slit or hole of the nylon tube 25 can be formed in an appropriate position and in an appropriate size, and can be averaged by each slit or hole of the nylon tube 25 so that the mist can be blown away. Further, since the closed loop is formed by the T-type cheese 23, the nylon tube 25, the U tube 26 and the metal tube 27, the whole is kept at a constant pressure, so that the atomized gas from each cut or hole is misted. Fluctuation in the amount of (micro mist) ejection is small.

When the gas-liquid mixed cheese of the present invention is used for mist cleaning of radiation (decontamination), a high-pressure fluid such as water is supplied from the upstream side (the right side of FIG. 1) of the cheese body 5 of the gas-liquid mixed cheese 1, A high-pressure fluid containing a 30 μm zeolite powder is supplied from the high-pressure air pipe 12 and merged at the middle frame 8 position.
The high-pressure fluid containing 30 μm zeolite powder supplied from the high-pressure air pipe 12 at the middle piece 8 position is a high-pressure fluid such as water downstream from the inclined cut 7 of the middle piece 8 at an angle of 40 to 50 °. And is pumped as a high-speed, high-pressure gas-liquid mixed fluid.
The gas-liquid mixed fluid collides with cesium attached to an object to be contaminated by a high-speed jet flow to perform ion exchange and decontamination.
Since the 30 μm zeolite and the 30 μm mist perform ion exchange for cesium, cesium is taken into the zeolite. As a characteristic of zeolite, the effect of decreasing the dose of cesium incorporated in the interior is recognized. Zeolite is insoluble in water and the radiation dose in the wastewater is low.

DESCRIPTION OF SYMBOLS 1 Gas-liquid mixed cheese 2 Step part 3 Small diameter outer peripheral part 4 Mating screw hole 5 Cheese main body 6 Ring protrusion 7 Inclined cut 8 Middle piece 9 Large diameter inner peripheral part 10 Small diameter inner peripheral part 11 Pressure feed pipe 12 High pressure air piping 13 Screw Part 14 taper surface 15 step part 16 screw part 17 handle 18 high-pressure liquid supply pipe 19 air suction hole 20 tank 21 compressor 22 nipple 23 T-type cheese 24 two-fluid nozzle 25 nylon tube 26 U pipe 27 metal pipe 28 flow rate adjusting valve

Claims (3)

  A straight pipe made of a metal cylinder, with a high-pressure liquid supply pipe connected to the upstream opening end side, a stepped portion provided on the downstream opening end side to form a small-diameter outer peripheral portion, and further penetrating into the middle of the trunk portion A cheese main body formed with a fitting screw hole and a cylindrical tube that is inserted into the cheese main body to form an inward tapered surface at the upstream opening end and an outward tapered surface at the downstream opening end An annular protrusion that engages with the downstream opening end of the cheese body is provided on the side opening end side, and an inclined cut surface that is inclined downstream at an angle of 40 to 50 ° is formed at the fitting screw hole position of the cheese body. A small-diameter inner periphery that has a large-diameter inner peripheral portion that fits into the downstream-side small-diameter outer peripheral portion of the cheese body, and sandwiches the annular protrusion of the middle piece with the downstream-side opening end of the cheese main body. Connected to the fitting screw hole of the cheese body Gas-liquid mixing cheese, characterized in that it is composed of a pressure indication tube.   A handle is formed with a space before and after the lower part of the gas-liquid mixed cheese according to claim 1, and the rear handle is also used as a high-pressure air pipe so that the inside of the handle can be supplied with high-pressure air. In addition, a high-pressure liquid supply pipe is connected to the upstream side of the gas-liquid mixed cheese, the high-pressure liquid supply pipe is connected to the lower part of the tank containing abrasives and media, and high-pressure air from the compressor is supplied to the upper part of the tank. The abrasive and media are supplied from the lower part of the tank to the upstream side of the gas-liquid mixed cheese, and high-pressure air from the compressor is held behind the gas-liquid mixed cheese via the high-pressure air pipe. Nozzle gun supplied to the upstream side of the nozzle.   The gas-liquid mixed cheese according to claim 1, a T-type cheese that is connected to a downstream side of the gas-liquid mixed cheese via a nipple and branches the gas-liquid mixed fluid in two directions, and a downstream side of the T-type cheese A two-fluid nozzle connected to the two-fluid nozzle, a nylon tube connected to the two-fluid nozzle by a connector and having a cut or a hole at an appropriate position, a U tube connected to the nylon tube, and the U tubes A micromist generator comprising: a metal tube to be connected, and forming a closed loop by the T-type cheese, the nylon tube, the U tube, and the metal tube.

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