JP3838463B2 - Gas and liquid mixing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mixes compressed air and pressurized liquid when peening the treated product by jetting a mixture of compressed air and pressurized liquid (hereinafter referred to as “pressurized liquid”) from a nozzle. It is related with the apparatus to do.
[0002]
[Prior art]
Conventionally, for example, as one of methods for peening a treated product, there is a method in which a high-pressure water flow having a pressure of 60 to 80 MPa is projected from the nozzle onto the treated product.
[0003]
[Problems to be solved by the invention]
However, in such a conventional peening method, a high-pressure water flow having a pressure of 60 to 80 MPa is ejected from the nozzle, but a large and expensive high-pressure water flow generator is necessary to obtain this high-pressure water flow. Therefore, the applicant of the present invention is a method in which compressed air is first mixed with a pressurized liquid and the mixture is jetted from a nozzle so that a required impact force can be obtained without using a high-pressure water flow. Developed and applied for a patent.
[0004]
By the way, as a means for mixing the compressed air with the pressurized liquid, as shown in FIG. 3B, generally, a method of supplying the pressurized liquid separately from the supply pipe at a position in front of the jet port of the compressed air is adopted. However, the compressed air and the pressurized liquid do not mix efficiently as shown in Fig. 3B. In addition, when the pressure of the compressed air is constant, the mixture pulsates and is injected from the nozzle. There was a problem such as.
[0005]
The present invention has been made to solve the above problems, and an object of the present invention is to efficiently mix compressed air and pressurized liquid and to spray the mixture from a nozzle without pulsation. Is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the gas / liquid mixing apparatus according to the present invention uses compressed air when peening a processed product by jetting a mixture of compressed air and pressurized liquid from a nozzle in the atmosphere. And a pressurized liquid, which is generally cylindrical and has a tapered portion formed downstream from the flow of the mixture, and further stores the liquid upstream from the tapered portion. An outer cylinder member having a supply port communicating with the tank; and a cylindrical body as a whole, and is inserted into the outer cylinder member substantially concentrically with the inner end of the tapered portion of the outer cylinder member. A cylindrical hollow chamber communicating with the supply port can be defined by the outer cylinder member, and an inner cylinder member having a proximal end communicating with a compressed air source is provided. And
[0007]
[Action]
In this configuration, when compressed air with a constant pressure is squeezed out from the tip of the inner cylinder member, the velocity of the rod-shaped air flow formed by the compressed air that is squeezed out increases the inner surface of the tapered portion of the outer cylinder member Since it is much larger than that of the pressurized liquid flowing out from the gap with the tip of the member, the pressurized liquid is smoothly supplied and mixed into the airflow. Further, by adjusting the distance between the inner surface of the tapered portion of the outer cylinder member and the tip of the inner cylinder member, the flow rate of the pressurized liquid flowing out from the gap corresponds to the flow rate / pressure of the air flow, etc. The mixture is ejected from the nozzle without generating pulsation.
[Patent 001]
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, a peening apparatus to which the present invention is applied includes a compressed air source 1 for supplying compressed air, a nozzle 2 for injecting compressed air from the compressed air source 1 toward a processed product, and the nozzle A mixing device 3 for mixing pressurized liquid into compressed air before being jetted from 2, a flow rate sensor 4 for detecting the flow rate of compressed air supplied to the mixing device 3 in an uncompressed state, and premixing Based on the detection result of the flow sensor 4 in advance, a liquid storage tank 5 having a sealed structure for supplying pressurized liquid to the apparatus 3, a flow rate control valve 6 for controlling the flow rate of pressurized liquid supplied to the mixing apparatus 3, and the flow rate sensor 4. And a controller 7 that calculates a target opening degree of the flow control valve 6 from the measured data and issues a command to the flow control valve 6.
[0009]
The compressed air source 1 is connected to the flow sensor 4 through an on-off valve 8, a T-shaped tube 9, and a pressure control valve 10, and the mixing device 3 is connected to the nozzle 2 through a flexible hose 11. Is connected in communication. The mixing device 3 is configured as shown in FIG. That is, a taper portion 12 is formed on the right side, which is the downstream side when viewed from the flow of the mixture formed by mixing a pressurized liquid into compressed air as a whole, and the center is the upstream side of the taper portion 12. A supply port 13 communicating with the liquid storage tank 5 is provided in the vicinity of the portion, and a small diameter portion 14 is provided on the left side corresponding to the upstream side of the supply port 13, and a larger diameter is provided on the left side corresponding to the upstream side of the small diameter portion 14. An outer cylinder member 16 having a large-diameter portion 15 and having a screw portion 15a engraved on the left portion of the large-diameter portion 15, and an overall cylindrical shape that is substantially concentric with the outer cylinder member 16. The distal end which is inserted and slidably penetrates the small-diameter portion 14 thereof and which is the right end portion can be advanced and retracted with respect to the inner surface of the tapered portion 12 of the outer cylinder member 16, and further, the proximal end which is the left end portion Communicates with the compressed air source 1 via the flow sensor 4 An inner cylinder member 17, in are constituted. Thus, a cylindrical hollow chamber communicating with the supply port 13 is defined by the downstream side of the small diameter portion 14 in the outer cylinder member 16 and the inner cylinder member 17.
[0010]
The supply port 13 of the outer cylinder member 16 is connected to the liquid storage tank 5 through a guide pipe 30. The inner cylinder member 17 has protrusions 17a and 17a on the upper and lower sides of the left outer surface. Bolts 18 and 18 extending to the right are fixed to the projections 17a and 17a, respectively. The bolts 18 and 18 project the projections 16a and 16a projecting from the left outer surface of the outer cylinder member 16 to the left and right. Further, two nuts 19 and 19 are screwed to each bolt 18 with a protrusion 16a interposed therebetween, and the inner cylinder member 17 is moved in the left and right direction by forward and reverse rotation of the nuts 19 and 19. The movement can be adjusted. A pressing member 20 is screwed to the screw portion 15 a of the outer cylinder member 16, and a seal member 21 is provided between the small diameter portion 14 of the outer cylinder member 16 and the pressing member 20 in the inner cylinder member 17. It is.
[0011]
The flow sensor 4 has a check valve (not shown) in the compressed air passage portion so that the liquid mixed in the compressed air does not flow back to the instrument portion. The liquid storage tank 5 is mounted on the carriage 22 and is movable. A communication pipe 24 connected to the branch portion of the T-shaped tube 9 through a pressure control valve 23 faces the upper part of the liquid storage tank 5 so that the compressed air from the compressed air source 1 is received. The liquid in the liquid storage tank 5 is pressurized at a required pressure. Furthermore, a communication pipe 28 connected to the liquid supply device 25 via an on-off valve 26 and an electromagnetic on-off valve 27 faces the upper part of the liquid storage tank 5, and the electromagnetic on-off valve 27 is at a level described later. A required amount of liquid is supplied to the liquid storage tank 5 in conjunction with the sensor 29.
[0012]
Further, a level sensor 29 for detecting a lower limit and an upper limit of the amount of liquid is provided on the ceiling of the liquid storage tank 5. In addition to the flow rate sensor 4 and the flow rate control valve 6, the pressure control valves 10, 23, the flow rate control valve 27 and the level sensor 29 are also electrically connected to the controller 7. The controller 7 is mounted on the outer surface of the liquid storage tank 5.
[0013]
Next, the operation of the apparatus configured as described above will be described. Compressed air supplied to the mixing device 3 by supplying a predetermined amount of liquid to the liquid storage tank 5 in advance through the flow rate control valve 27 and inputting the necessary pressure relating to the pressure control valves 10 and 23 to the controller 7 in advance. And the pressure of the liquid supplied to the mixing device 3 are respectively set. Further, by adjusting the distance between the inner surface of the tapered portion of the outer cylinder member 16 and the tip portion of the inner cylinder member 17, the flow rate of the liquid flowing out from the gap is constituted by squeezing from the tip of the inner cylinder member 17. It should be compatible with the flow rate and pressure of the rod-shaped airflow.
[0014]
When the apparatus is operated with the controller 7 under this state, the compressed air supplied from the compressed air source 1 is adjusted to a required pressure by the pressure control valve 10 and the flow rate converted into the uncompressed state is a flow sensor. After being measured by 4, the flow rate is controlled by the flow rate control valve 6 and supplied to the mixing device 3. The compressed air supplied to the mixing device 3 forms a rod-shaped airflow that oozes out from the tip of the inner cylinder member 17 and has a constant pressure. Also, the inner surface of the tapered portion 12 of the outer cylinder member 16 and the inner cylinder member 17 The pressurized liquid flows out along the outer peripheral surface of the air flow by a predetermined amount from the gap with the tip.
[0015]
By the way, when the compressed air is squeezed out from the tip of the inner cylinder member 17 in this way, the speed of the rod-shaped air flow formed by the squeezed compressed air is changed between the inner surface of the tapered part of the outer cylinder member 16 and Since it is much larger than that of the liquid flowing out from the gap with the tip, the pressurized liquid is smoothly mixed and supplied into the airflow. Further, the distance between the inner surface of the tapered portion 12 of the outer cylinder member 17 and the tip of the inner cylinder member 17 is adjusted so that the flow rate of the liquid flowing out from the gap corresponds to the flow rate, pressure, etc. of the air flow. Thus, the mixture is jetted from the nozzle without generating pulsation.
[0016]
【The invention's effect】
As is clear from the above description, the present invention mixes compressed air and pressurized liquid when peening the processed product by ejecting a mixture obtained by mixing compressed air and pressurized liquid from the nozzle in the atmosphere. an apparatus for the overall look from the flow of said mixture forms a cylindrical-shaped to form a tapered portion on the downstream side of the further supply port communicating with the storage tank of the liquid on the upstream side of the tapered portion An outer cylinder member having an overall cylindrical shape, and inserted into the outer cylinder member substantially concentrically with the outer cylinder member, the tip portion being adjustable in relation to the inner surface of the tapered portion of the outer cylinder member, A cylindrical hollow chamber communicating with the supply port can be defined by the outer cylinder member, and an inner cylinder member whose base end communicates with the compressed air source. Mix well and the mixture does n’t pulsate An excellent effect such as can be ejected from the nozzle.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
FIG. 2 is a schematic front view of a peening apparatus to which the present invention is applied.
FIG. 3 is an explanatory view showing a mixed state of gas and liquid in a conventional gas and liquid mixing apparatus.
[Explanation of symbols]
5 Liquid storage tank 12 Tapered portion 13 Supply port 16 Outer cylinder member 17 Inner cylinder member
[Patent 001]
6

Claims (1)

A device that mixes compressed air and pressurized liquid when peening the processed product by ejecting a mixture of compressed air and pressurized liquid from the nozzle in the atmosphere ,
An outer cylinder member having a supply port communicating with the liquid storage tank on the upstream side of the taper part, further forming a tapered part on the downstream side as viewed from the flow of the mixture as a whole.
A cylinder that is generally formed in a cylindrical shape and is inserted substantially concentrically into the outer cylinder member, the tip of which can be advanced and retracted with respect to the inner surface of the tapered portion of the outer cylinder member, and communicates with the supply port. An inner cylindrical member capable of defining a hollow chamber with the outer cylindrical member and having a proximal end communicating with a compressed air source;
A gas and liquid mixing apparatus characterized by comprising:

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