JPH08318468A - Injection method of grinding/polishing/cleaning(gpc) material, and gpc equipment using the method - Google Patents

Abstract

PURPOSE: To provide an injection method where a hose is relatively light and inexpensive, the length of the hose is not restricted, the grinding/polishing/ cleaning(GPC) material can be efficiently Injected, the pressure resistance Is not required as a storage container of the GPC material, and the amount and speed of injection of the GPC material can be adjusted. CONSTITUTION: A storage container 1 of the grinding/polishing/cleaning(GPC) material, a compressor 6, and an injection nozzle 10 to eject the GPC material are provided. The storage container 1 is provided with a means to feed a constant amount of the GPC to the outside, and a first piping 3 to forcibly feed the GPC material to be fed by the feeding means to the injection nozzle 10, and a second piping 8 to transfer only the high pressure air jet to the injection nozzle 10 are arranged between the compressor 6 and the injection nozzle 10. The GPC material to be forcibly fed from the first piping 3 in the injection nozzle 10 is injected from an injection port by the high pressure air jet transferred from the second piping 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning material for spraying a cleaning material composed mainly of synthetic resin beads or the like onto a surface of an object at high pressure to remove and remove a coating film on the surface of the object or deposits such as rust. The present invention relates to a high-pressure jetting method of a cleaning material and a polishing and cleaning apparatus using the same.

[0002]

BACKGROUND OF THE INVENTION Conventionally, a solvent or the like has been used to remove coating films or rust adhering to the surface of various structures, equipment, equipment, devices, appliances, etc. There are a wet method of removing the chemicals by using the above chemicals and a dry method of spraying the abrasive with a high pressure.

In the case of the wet method, not only is it costly and troublesome to treat the drain generated during the work, but there is also a problem in safety, so that the dry method has been recently favored and used. Various abrasives are used, such as synthetic resin beads and dry ice, depending on the physical properties such as hardness and viscosity of the base material of the target object and the adhered substances to be peeled off.

Such a blasting / cleaning device generally has a structure as shown in FIG. That is, the polishing agent is stored in the high-pressure container A, and the supply valve B provided at the bottom of the high-pressure container A is connected to the base end of the hose D having the injection nozzle C attached to the distal end thereof. The supply valve B is adjusted while pressurizing by the pressurizing means, and the polishing and cleaning material is sprayed from the jet nozzle C at a high pressure to a desired position to remove and remove the deposits on the surface.

[0005]

However, the blasting and cleaning apparatus described above has the following problems. Since the abrasive material is transferred at a high pressure in the hose, the hose D must be formed into a multi-layer structure with a special material having abrasion resistance and pressure resistance, and the hose D is not only expensive. It also becomes relatively heavy and lacks operability when ejecting the abrasive.

Since the air passing through the hose causes resistance due to the abrasive material to be transferred, the pressure drops by the time it reaches the injection port of the injection nozzle C, the loss of the injection speed becomes large, and the efficiency is poor. . Further, considering the pressure loss of air, the length of the hose D is also limited, and the working range is limited. For example, it is generally difficult to work at a distance of 20 m or more from the storage container A in this type of blasting and cleaning apparatus using a blasting and cleaning material made of synthetic resin beads.

Since a pressure resistant container and a pressurizing means inside the container are required as a storage container A for the cleaning and cleaning material, and moreover, a plurality of pressure resistant containers must be provided in the case of continuous operation, the whole apparatus becomes large and installed. The space also becomes large.

Furthermore, it is difficult to adjust the pressure and amount of the polishing and cleaning material jetted from the jet nozzle, and waste is likely to occur.

In view of these problems of the prior art, an object of the present invention is that the hose used can be relatively lightweight and inexpensive, and can be efficiently sprayed with a polishing / cleaning material without being restricted in length. Moreover, it is another object of the present invention to provide a method of ejecting a cleaning / cleaning material that does not require pressure resistance as a container for storing the cleaning / cleaning material. l

Another object of the present invention is to provide a polishing / cleaning apparatus which can be made compact and lightweight as a whole and which can adjust the injection amount and injection speed of the cleaning / cleaning material.

[0011]

According to the method of the present invention, in order to achieve the above-mentioned object, the abrasive cleaning material is pressure-fed to the injection nozzle from the storage container of the abrasive cleaning material via the conduit, and A high-pressure air stream is sent to the injection nozzle via a different conduit, and the abrasive material supplied to the injection nozzle via one conduit is ejected by the high-pressure air stream supplied via the other conduit. The feature is that they are allowed to do so.

Further, the device of the present invention is characterized in that it has the following configuration. That is, this apparatus firstly includes a storage container for the polishing / cleaning material, a compressor, and an injection nozzle for ejecting the polishing / cleaning material. The storage container is provided with means for quantitatively supplying the polishing / cleaning material to the outside, and between the compressor and the injection nozzle, a first conduit for pressure-feeding the polishing / cleaning material supplied by the supply means to the injection nozzle. And a second conduit for transferring only the high-pressure airflow to the injection nozzle, and the high-pressure airflow transferred from the second conduit to the abrasive cleaning material pumped from the first conduit in the injection nozzle. Is to be ejected from the ejection port.

A pressure adjusting valve may be provided in the first and second pipelines so that the pressure can be adjusted appropriately. A high-pressure rotary valve whose rotation speed can be adjusted is desirable as a quantitative supply means for the polishing agent, and this valve connects the inside of the storage container and the first pipeline in the open state. Further, it is desirable that the jet nozzle has a structure capable of adjusting the amount of the abrasive cleaning agent jetted.

[0014]

In this method, the abrasive material is sent to the injection nozzle through the supply pipe line and is ejected from the injection port by the high-pressure air flow supplied through the other pipe line. Therefore, it is not necessary to transfer the polishing / cleaning material itself at a pressure as high as necessary to secure the injection pressure, and the wear of the supply pipe line is reduced correspondingly, and pressure resistance is not considered so much. Therefore,
The abrasive cleaning material supply line and the high-pressure air flow supply line are relatively lightweight, and the operability is improved.

Since the high-pressure air flow for jetting does not need to consider the resistance associated with the conveyance of the abrasive cleaning material, the pressure loss is almost eliminated, and it is possible to use a long conduit. The jetting pressure of the abrasive cleaning material from the injection nozzle is adjusted by the air flow pressure in the conduit different from the abrasive cleaning material pressure-feeding conduit, so that it is not necessary to use a pressure resistant container as a reservoir for the abrasive cleaning material.

Further, in this apparatus, the polishing agent is supplied from the storage container to the first pipe (the above-mentioned pressure feeding pipe) and the injection nozzle via the constant amount supply means. Therefore, it is possible to finely adjust the injection amount in the injection nozzle.

[0017]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a diagram showing an outline of a polishing and cleaning apparatus according to an embodiment of the present invention. Reference numeral 1 in the figure is a storage container for the abrasive material. As the cleaning material S, beads made of synthetic resin (for example, 30
The particle size is about 0 to 850 μm and the hardness is about 3.0 to 4.5). The storage container itself is an ordinary container having a funnel-shaped bottom, and does not need to be a pressure-resistant container. The bottom of the storage container is connected to the first conduit 3 via the high pressure rotary valve 2.
Communicate with The rotary valve 2 is a variable geared motor 4
Allows the rotation speed to be adjusted freely.

The first pipe 3 is a supply hose for the cleaning material S, the tip of which is connected to the injection nozzle 10, and the base of which is supplied with high pressure air from the compressor 6 via the first pressure regulating valve 5. Is connected to the main conduit 7. The first pressure regulating valve 5 is
The pressure of the air flowing through the abrasive cleaning material supply hose is reduced to a pressure that is necessary and sufficient for the abrasive cleaning material S to be conveyed to the jet nozzle 10. The base end of the second conduit 8 is connected to the main conduit 7 in parallel with the first conduit 3 via the second pressure regulating valve 9. The second conduit 8 is an air supply hose that supplies high-pressure air to the injection nozzle 10, and its tip is connected to the injection nozzle 10. The second pressure regulating valve 9 appropriately changes and adjusts the injection pressure of the polishing and cleaning material S from the injection nozzle 10 in accordance with the physical properties of the surface deposit and the type of the target object.

The jet nozzle 10 is a multi-phase nozzle for jetting the polishing and cleaning material S supplied from the first conduit 3 by the high pressure air flow supplied from the second conduit 8, as shown in FIG. 2, for example. Have a structure. Reference numeral 11 in the drawing denotes a nozzle body, and an injection hole 12 is formed at the center of the nozzle body. The inner end of the injection hole 12 has a mortar-shaped receiving surface 13.

Reference numeral 14 is a head for covering the nozzle body 11, and an adjusting tube 15 is fixed to the center of the head. A through hole 16 penetrates the adjusting pipe 15 in the axial direction, and a tip end 15a thereof is formed in a tapered shape such that the outer circumference thereof substantially coincides with the receiving surface 13 of the injection hole 12. The head 14 is screwed to the nozzle body 11 and the adjusting tube 15, and the tip of the adjusting tube 15 is moved toward or away from the receiving surface 13 of the injection hole 12 of the nozzle body 11 by adjusting the screwing amount. It has become. In addition, the head 14 communicates with a retention chamber 17 formed between the tip 15a of the adjusting tube 15 and the receiving surface 13 of the injection hole 12, and the introduction tube 1
8 The base end of the introduction pipe 18 is connected to the tip of the second conduit 8 that sends an air flow. The tip of the first conduit 3 for supplying the cleaning material S is connected to the base end of the adjusting tube 15.

In this embodiment, the cleaning material S in the storage container is sent to the first pipeline 3 via the high pressure rotary valve 2.
Along with the relatively low-pressure air flow that has flowed in via the pressure regulating valve 5, it is transferred in the first pipe line and flows into the retention chamber 17 of the multi-phase nozzle 10 from the through hole 16 of the adjustment pipe 15. On the other hand, the high-pressure air flow flows through the second conduit 8 as it is, and the multiphase nozzle 1
0 from the introduction pipe 18 to the retention chamber 17. Multi-phase nozzle 10
Is rotated by rotating the head 14, that is, the volume of the retention chamber 17, that is, the gap 1 between the outer peripheral surface of the tip of the adjusting tube and the injection hole receiving surface 13.
The width of 9 is adjusted. Therefore, when the gap 19 is narrowed, a relatively small amount of airflow is made to flow from the through hole 16 of the adjusting tube 15 to the polishing and cleaning material S injected through the injection hole 12, and the gap 19 When the width is wide, a relatively large amount of air flow is made to flow.

The mixing of the cleaning material into the high-pressure air stream in the injection nozzle and the adjustment of the amount thereof may be realized by adopting a different structure in the injection nozzle. Further, the amount of the polishing / cleaning material supplied to the injection nozzle is controlled by adjusting the rotation amount of the high-pressure rotary valve and the speed of the air flow flowing through the first conduit.

For example, assuming that the polishing beads having a specific gravity of 1.3 are supplied to an injection nozzle 10 m away from a storage container at 2.3 kg / min, the conventional apparatus uses a sandblast hose having an inner diameter of 19 mm and an outer diameter of 35 mm to provide 6 kg. It must be pumped with air pressure of / min, but the total weight of this hose is 8.8Kg
Becomes On the other hand, when sending the abrasive cleaning material under the same conditions by using the apparatus according to the above-mentioned embodiment, an air amount of 50 l / min and a speed of 4.9 m / s are supplied using the abrasive cleaning material supply hose having an inner diameter of 6 mm and an outer diameter of 8 mm. In addition, 1500 l / min of air is sent at a speed of 24 m / s from an air supply hose having an inner diameter of 15 mm and an outer diameter of 25 mm. The total weight of the hose in this case is only 2.9 kg.

[0024]

As described above, according to the present invention, the pipeline for pumping the polishing / cleaning material to the jet nozzle and the pipeline for supplying the air flow for jetting the polishing / cleaning material to the jet nozzle are separated and jetted. Since the nozzle mixes the two and ejects them, it is possible to use a relatively lightweight and inexpensive pipe line such as a hose to be used, and there is no restriction on the length as in the past. Moreover, there is no loss in the ejection speed of the abrasive material from the ejection nozzle, and the work efficiency can be dramatically improved.

Further, since it is not necessary to use a pressure resistant container as a storage container for the polishing / cleaning material, it is possible to continuously supply the polishing / cleaning material by simply opening / closing an appropriate valve means or the like, and the apparatus itself. It is economical and can be miniaturized. Further, it has an advantage that the injection amount and the injection speed of the polishing agent can be easily adjusted.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of an apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a jet nozzle used in the device of FIG.

FIG. 3 is an explanatory diagram showing an outline of a polishing and cleaning apparatus according to a conventional example.

[Explanation of symbols]

 1 ... Reservoir 2 ... Rotary valve 3 ... First line (polishing and cleaning agent supply line) 5 ... 1st pressure regulating valve 8 ... 2nd pipeline (high pressure air flow supply pipeline) 9 ... 2nd regulation valve 10 ... Injection nozzle 11 ...・ ・ ・ ・ Nozzle body 12 ・ ・ ・ ・ ・ ・ Injection hole 13 ・ ・ ・ ・ ・ ・ Reception surface 14 ・ ・ ・ ・ Head 15 ・ ・ ・ ・ ・ ・ Adjustment tube 16 ・ ・ ・ ・ ・ ・17 ・ ・ Storing chamber 18 ・ ・ ・ ・ ・ ・ Introduction pipe 19 ・ ・ ・ ・ ・ ・ Gap S ・ ・ ・ ・ ・ ・

Claims (5)

[Claims] 1. A polishing and cleaning material is pressure-fed from a polishing and cleaning material storage container to a jet nozzle through a pipe, and a high-pressure air stream is sent to the jet nozzle through a pipe different from the pipe. The method of injecting a polishing / cleaning material, characterized in that the above-mentioned polishing / cleaning material supplied to the nozzle is ejected from an injection port by a high-pressure air stream supplied to the nozzle. 2. A storage container for the polishing and cleaning material, a compressor, and an injection nozzle for ejecting the polishing and cleaning material, and the storage container is provided with a supply means for supplying the polishing and cleaning material to the outside in a fixed amount. Between the injection nozzle and the injection nozzle, there is provided a first conduit for pumping the polishing / cleaning material supplied by the supply means to the injection nozzle, and a second conduit for transferring only the high-pressure air stream to the injection nozzle. The above-mentioned injection nozzle ejects the polishing and cleaning material pumped from the first pipeline from the injection port by the high-pressure airflow transferred from the second pipeline. 3. The blasting / cleaning device according to claim 2, wherein a pressure regulating valve is attached to each of the first and second pipelines. 4. The quantitative cleaning material supply device is a high-pressure rotary valve attached to the bottom of a storage container, the rotation speed of which is variable, and when the valve is open, the inside of the storage container and the inside of the first pipe line. The polishing and cleaning device according to claim 2, wherein the polishing and cleaning device communicates with. 5. The blasting / cleaning device according to claim 2, wherein the blasting nozzle has a variable amount of the blasting / cleaning material jetted by the high-pressure air stream.