JPH0825221A - Blast processing head - Google Patents

Abstract

PURPOSE:To prevent the scattering of the cleaning material sprayed from a blast nozzle or the cleaning chips generated by blast processing, effectively recover them, and cope with steps of the cleaned surface. CONSTITUTION:A cleaning material scattering preventing chamber having a double structure is arranged around a blast nozzle 14, and the chamber is divided into an outside chamber 2 and an inside chamber in the width direction. A suction/recovery nozzle 5 is fitted to the outside chamber 2, and a straightening vane is fitted inside the inside chamber. A secondary air guide hole is provided on the side face of the outside chamber 2, an opening section is provided on the inside chamber at the position related to it, the secondary air flows in through the air guide hole via the suction of the suction/recovery nozzle 5, it is regulated by the straightening vane through the opening section of the inside chamber and guided to the recovery nozzle 5 through the vicinity of the cleaned surface, and the cleaning material and cleaning chips are recovered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head of a blasting treatment apparatus for blasting and cleaning work, which is applied to the coating surface or coating surface of an oil tank or the like.

[0002]

2. Description of the Related Art A head portion of a conventional blast processing apparatus is shown in FIGS.

In these drawings, in the head portion of a conventional blasting apparatus, a sandblasting nozzle 102 inserted in a sandblasting hood 101 sprays a polishing agent on a surface to be polished 1 to generate a polishing swarf. The mixture of abrasives is sucked and collected by the suction nozzle 103.

Blast hood 10 that abuts the surface to be polished 1
The inside of the blast hood 101 is sealed by the elastic or flexible seal member 105 provided on the peripheral portion of
Abrasive debris and abrasive are prevented from flowing out. (See, for example, JP-A-63-22272.)

[0005]

In the conventional blast head, the blast nozzle is fixed to the blast hood as described above, and the polishing width can be adjusted by the spray angle from the nozzle. In order to maintain the cleaning performance, the cleaning width cannot be wide.

When a plurality of nozzles are provided,
Although the cleaning width can be secured, it is necessary to have multiple supply hoses or to increase the diameter.

Further, there are various problems such as a large capacity of the hood for recovering the most important polishing scraps and abrasives, which deteriorates the recovery function.

That is, in the conventional blast head, it was not possible to secure a wide polishing width and improve the efficiency of the cleaning operation.

The present invention solves each of these problems, widens the polishing width in the shot blasting head, prevents the external scattering of the abrasive swarf and the abrasive, and reliably collects them to ensure the removal of the abrasive. The purpose of the present invention is to provide a new blast processing head that can improve the efficiency of polishing and cleaning work and realize automation (mechanization) of work by realizing recycling and reuse.

[0010]

As a structure for achieving the above object, a blasting head of the present invention has an inner and outer double structure around a blast nozzle for injecting a polishing and cleaning material onto a surface to be polished. A polishing agent scattering prevention chamber is provided, a polishing agent suction / recovery nozzle is continuously provided inside the chamber, a secondary air introduction hole is provided on a side surface of the outer chamber, and a current plate is provided inside the inner chamber. It is characterized in that it is mounted so that the flow of the secondary air from the secondary air introduction hole provided on the side surface of the outer chamber is passed near the surface to be polished.

[0011]

According to the blasting head of the present invention having the above construction, there are the following actions.

(1) Since the blast nozzle is arranged in the chamber for preventing scattering of the polishing and cleaning material, the polishing and cleaning material sprayed from the nozzle and the polishing scraps generated by the blasting process are not scattered to the outside.

(2) The air introduced from the secondary air introduction hole provided on the side surface of the outer chamber has its flow path regulated by the straightening plate in the chamber, and the polishing and cleaning material is likely to remain in the corner of the scattering prevention chamber. And shavings are collected on the suction recovery nozzle port along with the flow of the secondary air that is rectified and introduced. Therefore, the recovery rate is improved.

(3) Further, the surface to be polished may have a step due to lap welding or the like. According to the head of the present invention,
By dividing the inside of the anti-scattering chamber of the heavy structure into two in the width direction, it is possible to match the left and right heights with a large step on the surface to be polished, which enables wider application. Become.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view of a shot blasting head according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a side sectional view (cross section AA in FIG. 1), and FIG. 4 is B in FIG. Arrow view, FIG.
FIG. 3 is a sectional view taken along line CC of FIG.

In these figures, reference numeral 1 is a surface to be polished such as a painted surface or a coated surface of a petroleum tank.

Around the blast nozzle 14 for injecting a polishing / cleaning material (for example, fine sand particles) onto the surface to be polished, a polishing / cleaning material scattering prevention chamber having an inner / outer double structure is provided.

The polishing agent scattering prevention chamber comprises an outer scattering prevention chamber 2 and inner scattering prevention chambers 3 and 4 which are divided into two in the width direction as shown in FIG. The suction / recovery nozzle 5 is attached and connected to the recovery hose 6. The recovery hose 6 is connected to a blast recovery device (not shown).

On the other hand, as shown in FIG. 5, straightening vanes 7 and 8 are attached to the insides of the inner shatterproof chambers 3 and 4, respectively. Further, the inner scattering prevention chambers 3 and 4 are provided with elastic seals 9 at the contact portions with the surface to be cleaned 1 as shown in FIG.

Further, 2 is provided on the side surface of the outer scattering prevention chamber 2.
A plurality of secondary air introduction holes 10 are provided, and openings 11 are also provided in the inner shatterproof chambers 3 and 4 at positions communicating with them.

Therefore, when sucked from the suction / recovery nozzle 5, the secondary air flows in from the secondary air introducing hole 10 of the outer scattering prevention chamber 2, and the inner scattering prevention chambers 3, 4
It is regulated by the flow straightening plates 7 and 8 through the opening 11 and is guided to the suction recovery nozzle 5 through the vicinity of the surface to be cleaned 1 to be polished.

As shown in FIG. 3, a wide opening 12 is provided on the upper surface of the outer scattering prevention chamber 2.
A blast nozzle 14 fixed to the slide belt 13 is provided in the inside of the unit 2.

The slide belt 13 is a slide guide 15.
It is sandwiched between and is slidably supported by the outer scattering prevention chamber 2. Both ends of the slide belt 13 are stretched by a spiral spring 16 with a constant tension.

The blast nozzle 14 is held by a slide cylinder 17 and is reciprocally driven. At this time, the slide belt 13 is guided by the slide guide 15 and is reciprocally driven together with the blast nozzle 14 while maintaining airtightness. A blasting device (not shown) is connected to the blasting nozzle 14 via a blasting hose 18 to send the abrasive material.

The inner anti-scattering chambers 3 and 4 are fixed to the outer anti-scattering chamber 2, respectively, but the fixing positions can be adjusted in the height direction with respect to the surface to be cleaned 1 (arrow a in FIG. 3). (The fixing hole is an elongated hole and the fixing position is slid with a bolt), and it is possible to follow the left and right steps of the surface to be polished.

Further, as a guide for the surface to be polished when the apparatus is moved, the apparatus is equipped with casters 19.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea of the present invention.
All of them belong to the technical scope of the present invention.

[0028]

According to the blasting head of the present invention, the blasting material sprayed from the nozzle and the blasting dust generated by the blasting process are scattered to the outside by the splattering prevention chamber arranged around the blast nozzle. It is possible to prevent the above-mentioned problem and to collect the secondary cleaning air, which tends to remain in the corners of the wide chamber, on the flow by restricting the flow path of the secondary air for suction by the flow regulating plate and collecting it on the recovery nozzle side. Therefore, improvement of the recovery rate can be achieved. This makes it possible to automatically carry out the blasting work by repeatedly using the blasting material by recovery and regeneration.

The surface to be polished may have a step due to lap welding or the like. According to the head of the present invention, the left and right heights of the scattering prevention chamber inside the double structure can be adjusted to the step. Therefore, wider application is possible.

Since the blast nozzle is reciprocally driven, it is possible to carry out a wide range of blasting and cleaning, and the efficiency of blasting and cleaning work can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a shot blasting head according to an embodiment of the present invention.

2 is a side view of the device of FIG. 1. FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

4 is a view on arrow B of FIG. 1. FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a plan view of a conventional blasting head device.

FIG. 7 is a side sectional view of the device.

FIG. 8 is a front sectional view of the device.

[Explanation of symbols]

 1 surface to be polished 2 outer scattering prevention chamber 3, 4 inner scattering prevention chamber 5 suction recovery nozzle 6 recovery hose 7, 8 straightening plate 9 elastic seal 10 secondary air introduction hole 11 opening 12 wide opening 13 slide belt 14 Blast nozzle 15 Slide guide 16 Spiral spring 17 Slide cylinder 18 Blast hose 19 Castor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeru Nishida Inventor Shigeru Nishida Marunouchi 5-5-1 Marunouchi Sanyo Heavy Industries Co., Ltd. (72) Inventor Jiro Tagawa 15-1 Tomihisacho, Shinjuku-ku, Tokyo Inside Engineering Co., Ltd.

Claims (1)

[Claims] 1. A polishing / cleaning material scattering prevention chamber having an internal / external double structure is arranged around a blast nozzle for injecting the polishing / cleaning material onto a surface to be polished, and the cleaning / cleaning material suction / recovery chamber is provided inside the chamber. Secondary air flow from the secondary air introduction hole provided on the side surface of the outer chamber by connecting the nozzles and providing the secondary air introduction hole on the side surface of the outer chamber, and further installing the straightening plate inside the inner chamber. A blasting head, characterized in that it is configured so as to pass near the surface to be polished.