JP2000176840A - Blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly recover a blast material even in the case where it is difficult to adhere a closed part provided on a head end part of a blast nozzle on a surface of a material to be treated like backing treatment, etc., of a steel tower member at the time of repairing an existing steel tower, etc. SOLUTION: Closed parts 10, 11 of a truncated conical ring shape, etc., to a cover a circumference of a treating point are arranged facing against each other in such a way as to cover a material W to be treated from both sides on the side of a blast nozzle 2 and on its opposite side, these two closed parts 10, 11 are constituted of a flexible member of a brush of specified thickness enough to close free to pass through the material W, etc., and the blast material is certainly recovered by adhering their head end outer peripheral parts on each other and perfectly covering the treating point without making a clearance even when the material W passes through.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blasting apparatus used for repairing an existing tower or the like with a blasting material for a member constituting the tower.

[0002]

2. Description of the Related Art Generally, a blasting device for blasting a steel material is provided, for example, as shown in FIG. 4, with a blast nozzle 2 provided in a blast gun main body 1 and a tip end portion of the blast gun main body 1. A ring-shaped sealing portion 3, a supply hose 4 connected to the blast nozzle 2, a recovery hose 5 connected to a suction port of the blast gun body 1, a recovery tank 6 for recovering the blast material A, and a blast material A And a pressurized tank 7 for supplying the pressure.

[0003] In the above configuration, the blast material A in the pressurized tank 7 is injected from the blast nozzle 2 to the surface of the steel material W through the supply hose 4 by high-pressure air. Sealing part 3
The blast material A after the treatment is collected in the collection tank 6 via the collection hose 5 without scattering to the outside since the tip of the blast material is in close contact with the surface of the steel material. The blast material A in the recovery tank 6 is supplied to the pressurized tank 7 when the blast is stopped.

[0004]

When the conventional blasting apparatus as described above is to be used for foundation treatment of steel tower components in repairing an existing steel tower, the sealing portion and the workpiece are different depending on the size and orientation of the workpiece. There is a problem that a gap is formed between the blast members and the blast material is not sealed, and the blast material is scattered and most of the blast material (made of a hard resin or the like) cannot be collected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method in which it is difficult to make a sealed portion provided at the tip of a blast nozzle adhere to the surface of a material to be processed. Another object of the present invention is to provide a blast device capable of reliably collecting a blast material.

[0006]

According to a first blasting apparatus of the present invention, a blast nozzle is moved along a workpiece.
In a blasting apparatus for performing blast processing of a material to be processed by a blast material injected from a blast nozzle and recovering a blast material in a sealed portion covering a periphery of a processing location, the sealed portion is processed on a blast nozzle side and an opposite side thereof. The two sealing portions are made of a flexible member capable of sealing the material to be processed so as to be able to penetrate therethrough, and the outer peripheral portions of the distal ends thereof are closely attached to each other. (See Claim 1: FIG. 1) A second blasting apparatus of the present invention moves a blast nozzle along a material to be processed, performs blast processing of the material to be processed by blast material injected from the blast nozzle, and performs processing. In a blasting device for collecting a blast material in a sealed portion covering the periphery of a location, a blast nozzle having the sealed portion is arranged to face each other such that the sealed portion covers the material to be processed from both sides. Place
The two sealing portions are made of a flexible member capable of sealing the material to be processed so as to be able to penetrate therethrough, and their outer peripheral portions are closely attached to each other (see claim 2: FIG. 3).

The sealing portion is preferably a frustoconical ring extending toward the tip, and is preferably made of a brush having a predetermined thickness. In addition, it is preferable that the sealing portion disposed to be opposed is provided on a U-shaped support frame surrounding the material to be processed, and a roller is provided on the support frame so that the apparatus body is movably supported by the material to be processed. .

In the above-described configuration, the apparatus body is mounted on the material to be processed such that the material to be processed is positioned between the two sealed portions, and the outer peripheral portions at the tips of the two sealed portions are in close contact with each other. The blast processing is performed by ejecting the blast material from the blast nozzle while moving the apparatus body in the longitudinal direction of the material to be processed. Since the sealing portion is made of a brush having a predetermined thickness, even if the material to be processed penetrates, it is deformed along the outer shape of the material to be processed, and no gap is formed between the sealing portion and the material to be processed. Since the processing location of the material to be processed is completely sealed by the two sealing portions, the blast material does not scatter outside and the blast material can be reliably recovered.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. This embodiment is an example in which the present invention is applied to foundation treatment of a tower component in repair work of an existing tower. FIG. 1 shows a first blasting apparatus of the present invention, and FIG. 2 shows its use state, details of each part and modifications. FIG. 3 shows a second blasting device according to the present invention.

In the first blasting apparatus shown in FIG. 1, the sealing portion covering the blasting portion is a frustoconical ring, and the sealing portions 10 and 11 are provided with the workpiece W on the blast nozzle side and on the opposite side. They are arranged facing each other to cover from both sides.
The sealing portions 10 and 11 are, for example, brushes 10 having a predetermined thickness.
a, 11a so that the material to be treated (pylon component member) W can be penetrated, and even if it penetrates, no gap is formed between the material and the material to be treated W. Brushes 10a, 11a
The material is preferably a plastic or a metal which can maintain the shape and can be easily deformed by the material to be processed W.
The invention is not limited to the brush, and may be a linear member, a belt-like member, or the like, which can hold a shape and is equivalent to a brush deformed by a material to be processed.

Further, the sealing portions 10 and 11 are arranged such that the outer peripheral portions of the tips thereof are in close contact with each other. It is sufficient to press the ends so as to wrap each other. For example, as shown in FIG. 2 (d), a protruding portion 10b having an acute angle is provided at the lower portion of the outer periphery of the tip of one sealing portion 10 and the other sealing portion is provided. An acute-angled concave portion 11b into which the protruding portion 10b is inserted is formed in an upper portion of the outer peripheral portion of the distal end of
The structure in which the blast material is hard to leak from the contact surface can be made such that the contact surface at the outer peripheral portion of the tip 1 has a downward slope toward the inside.

As shown in FIG. 1, the sealing portion 10 on the side of the blast nozzle is
The sealing part 11 on the opposite side is fixed to the lower end of a support frame 13 having a U-shape in front view and a rectangular frame in side view in which the mounting ring 12 is fixed to the upper end. This support frame 13
Consists of a pair of left and right U-shaped support arms 13a, and connection members 13b and 13c for connecting the tips at the upper and lower portions of the support arm 13a, respectively.

The support frame 13 may be an integral body. However, if the support frame 13 is vertically divided at the center and the upper and lower members are fixed by bolts and nuts 14, the lower member is moved outward relative to the upper member. The sealing portions 10 and 11 can be brought into close contact with each other by attaching the workpiece to the workpiece W in an open state, and then closing the lower member inward, so that the blast device can be easily mounted on the workpiece W.

The support frame 13 has rollers 15, 1
6 is provided so that the blast device can be easily moved along the workpiece W. The roller 15 rolls the upper end of the material to be processed W to support the blasting device movably when performing blasting from above, and a pair of rollers 15 in the longitudinal direction of the material to be processed with the sealing portion 10 interposed therebetween. It is arranged and rotatably attached to the upper connecting member 13b via the mounting bracket 17. The mounting bracket 17 is provided with an elongated hole 18 in the vertical direction and is fixed with a nut 19 so that the position can be adjusted according to the size of the workpiece W.

The roller 16 rolls the upper end of the workpiece W to support the blasting device movably when performing blasting from the side (see FIG. 2 (e)). And 11 are disposed in a pair in the longitudinal direction of the material to be processed, and the upper and lower mounting members 20 and 21 of the support frame 13 are provided.
To be freely rotatable. Also in this case, the position can be adjusted by the elongated hole 22 and the nut 23 according to the size of the workpiece W. When the support frame 13 is of a split type, it is preferable that the top end of the shaft of the roller 16 be detachable from the lateral direction by cutting off the front end side of the long hole 22.

As shown in FIG. 2E, the other roller 15 can be used as a guide. FIG.
As shown in (b), the blast device can be mounted diagonally using the rollers 15 and 16 and the blast processing can be performed diagonally. In this case, the blast processing of the corner portion of the workpiece W can be performed.

In the case of using a blasting apparatus having the above-described structure to perform a base treatment using a blast material for a tower component of an existing tower, a recovery tank, a pressurized tank, a compressor,
A unit consisting of a drive unit and a control unit is placed on the ground, or placed on a work platform or a gondola for inspection. As shown in FIG. The blasting device is mounted on the workpiece W to be blasted so that the workpiece W is positioned and the outer peripheral portions of the tips thereof are in close contact with each other, and the worker manually moves the workpiece along the workpiece, and the blast nozzle 2 Blasting of the upper surface of the material to be processed is performed by the blast material A (made of a hard resin or the like) to be sprayed. When blasting the side surface of the workpiece W, as shown in FIG. 2 (e), the blasting device is turned sideways. When blasting the corner portion of the workpiece W, as shown in FIG. 3 (b), the blasting device is inclined.

Since the sealing portions 10 and 11 are made of brushes having a predetermined thickness, even if the workpiece W penetrates, the brush deforms along the outer shape of the workpiece W and the sealing portions 10 and 11 and the workpiece W
There is no gap between them, and the processing location of the material to be processed W is completely sealed by the two closed sealing portions 10 and 11, so that the blast material A does not scatter outside and is collected. The collection can be reliably performed in the collection tank via the hose 5.

Although not shown, it is also possible to attach a collection hose to the sealing section 11 side to collect the blast material. In addition, the shape of the nozzle hole of the blast nozzle 2 is as follows.
As shown in FIG. 2A, a circle, an ellipse, an oval, or the like can be used depending on the blasting area. In addition, as shown in FIGS. 2 (a) and 2 (b), the adhesive members 10 and 11 may have a double structure to enhance the sealing performance.

Next, in the second blasting apparatus shown in FIG. 3, two blast gun bodies 1 each having a sealing portion 10 are used, and they are provided at both ends of a support frame 13. The other configurations and operational effects are the same as those of the first blast device. In the case of this second blasting device, the workpiece W
Has the advantage that blasting can be performed simultaneously on both sides of the substrate.

Although the above description has been made of the example in which the present invention is applied to the foundation treatment of the steel tower constituent members of the existing steel tower, the present invention is not limited to this, and it goes without saying that the present invention can be applied to the blast processing of other steel materials.

[0022]

The blasting device according to the present invention has the following configuration, and has the following effects. (1) The blasting material can be completely recovered and reused, and blasting can be performed even on the material to be processed in which it is difficult to seal the processing location. (2) Special equipment for refilling the blast material and collecting the blast material is not required, and the cost can be reduced. (3) Since the blast material can be efficiently collected, work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an example of a first blast device of the present invention,
(a) is a front view and (b) is a side view.

FIG. 2 (a) is a partial cross-sectional front view showing a case where blasting is performed from above in a first blasting apparatus, FIG. 2 (b) is a cross-sectional view of a double-sealed portion, and FIG. Front view and bottom view showing holes, (d) is a cross-sectional view showing an example of a joining portion of upper and lower sealing portions, and (e) is a partial cross-sectional front view showing a case where blasting is performed from the side in the first blasting device. It is.

FIG. 3 is an example of a second blast device of the present invention,
(a) is a partial cross-sectional front view when blasting is performed from the side, (b) is a partial cross-sectional front view when performing blasting from an oblique direction, and (c) is a similar front view.

FIG. 4 is a schematic view showing a conventional blast device.

[Explanation of symbols]

 A: Blast material W: Material to be treated (components of existing steel tower, etc.) 1: Blast gun body 2 ... Blast nozzle 3 ... Conventional sealing part 4 ... Supply hose 5 ... Recovery hose 6 ... Recovery tank 7 Pressurized tank 10 Sealing portion 10a of the present invention Brush 10b Projecting portion 11 Sealing portion 11a of the present invention Brush 11b Concave portion 12 Mounting ring 13 Support frame 13a Support arm 13b Connecting member 13c Connecting member 14 Bolt / nut 15 Roller 16 Roller 17 Mounting bracket 18 Slot 19 Nut 20 Mounting member 21 Mounting member 22 … Long hole 23 …… nut

Claims (2)

[Claims] 1. A blast for moving a blast nozzle along a material to be processed, blasting the material to be processed with a blast material injected from the blast nozzle, and collecting a blast material in a closed portion covering a periphery of a processing location. In the apparatus, the sealing portion is disposed opposite to the blast nozzle side and the opposite side so as to cover the material to be processed from both sides, and the two sealing portions are formed of flexible members capable of sealing the material to be processed so as to penetrate therethrough. And a blast device wherein the outer peripheral portions of the tips are brought into close contact with each other. 2. A blast for moving a blast nozzle along a material to be processed, blasting the material to be processed with the blast material sprayed from the blast nozzle, and collecting the blast material in a sealed portion covering the periphery of the processing location. In the apparatus, the blast nozzle having the sealing portion is arranged to face each other so that the sealing portion covers the material to be processed from both sides, and the two sealing portions are formed of a flexible member capable of sealing the material to be processed so as to penetrate therethrough. And a blast device wherein the outer peripheral portions of the tips are brought into close contact with each other.