KR20140000853U - Blasting nozzle safety apparatus - Google Patents

Abstract

A blasting nozzle safety device is disclosed.
A blast nozzle safety device according to the present invention comprises a rear body connected to a hose to which compressed air and abrasive material are supplied, the rear body being attachably connectable to the hose and having a first nozzle hole; A guide plate fixed to the rear body; A lever plate coupled to the guide plate by a hinge pin so as to be rotatable and guided by the guide pin and the guide hole; And a front body fixed to the lever plate.

Description

{BLASTING NOZZLE SAFETY APPARATUS}

The present invention relates to a blast nozzle safety device, and more particularly, to a blast nozzle safety device, and more particularly, to a blast nozzle safety device for spraying a blasting material or an abrasive material such as sand, steel grit, garnet, The present invention relates to a blast nozzle safety device capable of preventing a safety accident by blocking injection of an abrasive material.

For ships and structures made by welding, the surface of the welded area after welding can be treated.

For example, after loading between blocks in shipbuilding, preprocessing work is carried out in a docked or quay-covered area.

Coating preprocessing work is usually done by a hydropower tool of grinding. In manual grinding work, work intensity is high and dust is generated so that worker avoids work.

Therefore, labor costs are rising for labor supply and demand. In addition, the quality of the preprocessing operation is limited by the hand tool operation, and dusts and sparks generate adverse effects on the surrounding work sites.

In addition, the abrasive blades of the grinder used in the manual grinding operation are consuming very much, resulting in a situation in which a consumable cost is continuously generated.

Currently, only a vacuum suction type robot blasting technique has been developed and applied in the post-mounting pretreatment process, or only a configuration capable of controlling the internal cleaning operation of the injection device and the amount of the abrasive jet is disclosed as disclosed in the patent document. There is no constitution which can prevent the safety accident in advance by quickly stopping the supply and can ensure the cut-off operation performance.

For example, various types of blasting are used to remove rust from steels at the shipyard. One of them, sand blasting, connects the air in the operating device to move the air + garnet contents on the hose and spray it from the end side to remove the rust do.

At this time, the blast nozzle is connected to the 25A hose, and the abrasive can be ejected through the ejection port of the blasting nozzle.

The blasting nozzle is made of a cemented carbide, and the inner diameter of the blasting nozzle is narrowed from 20 Φ to 6 to 8 Φ. Due to this geometrical feature, the straightness and speed of the garnet passing through the blasting nozzle can be controlled compared to the garnet inside the blasting hose.

The operator is holding the hose connected to the blasting nozzle and working toward the work surface of the workpiece, but if the hose and the blasting nozzle are missed, safety problems arise.

That is, when the blasting operation is performed inside the ship block, the operator takes the hose having a length of 50 to 100 m from the blasting feeder (for example, the sand blasting device) and enters the inside of the ship block to perform the blasting operation inside the block have.

Since the length of the hose is considerably long, and the blasting supply is stopped in case of emergency, the abrasive contained in the hose of 50 to 100 m in length remains in the hose even if the length of the hose is considerably long (50 to 100 m, for example) The air is sprayed for about 10 to 20 seconds due to the pressure of the air, thereby causing safety problems.

At present, it is possible to connect between hose and hose by using ball valve for a while and lock several times. However, when ball valve is used 3 ~ 4 times, it can not be used due to sand because it can be replaced. .

The abrasive spraying device of the patent document is a type in which the abrasive supply pipe and the air supply pipe are separated from each other and merely discloses simply opening the valve provided in each supply pipe and the compressed air and the garnet are compressed in the nozzle hole in front of the body, There is no configuration for rapidly shutting off simultaneously a mixture of high pressure, including air and abrasive (e.g., garnet).

Therefore, the operator using the abrasive spraying apparatus of the patent document can not quickly shut off the high-pressure mixture by a single operation in case of emergency.

Published Utility Model Publication No. 20-1998-043856

In this embodiment, a lever plate to which a front body is coupled and a guide plate to which a rear body is coupled are rotatably coupled, and the lever plate is rotated so that the first nozzle hole of the rear body coincides with the second nozzle hole of the front body Or disagreement of the blast nozzle, thereby providing a blast nozzle safety device capable of quickly preventing the injection of the high-pressure mixture including the compressed air and the abrasive, thereby preventing a safety accident.

According to an aspect of the present invention, there is provided a blast nozzle safety device connected to a hose supplied with compressed air and abrasive material, the blast nozzle safety device comprising: a rear body, which is attachably connectable to the hose and has a first nozzle hole; A guide plate fixed to the rear body; A lever plate coupled to the guide plate by a hinge pin so as to be rotatable and guided by the guide pin and the guide hole; And a front body secured to the lever plate.

The rear body further includes a hollow rear end connected to the hose; A front end portion integrally formed at the rear end portion and having a large diameter; And a first nozzle hole formed to penetrate the rear end portion and the front end portion in the longitudinal direction.

The guide plate may further include: an intermediate plate portion coupled to the front end portion and having a first passage hole communicating with the first nozzle hole; A hinge plate formed on one side of the intermediate plate and having a first hinge hole; And a guide plate portion formed on the other side of the intermediate plate portion and having the guide hole.

The lever plate may include: a connecting plate portion facing the guide plate; A handle portion formed at one side of the connecting plate portion and having a second hinge hole for engaging a hinge pin inserted into the first hinge hole; And a guide plate formed on the other side of the connection plate and having a pinhole for coupling the guide pin inserted in the guide hole.

The hinge pin or the guide pin may include a pin body extending from the head; And a nut screwed to the pin body.

The lever plate may include a block seating groove for blocking the abrasive or compressed air; And a blocking block seated in the block seating groove.

Also, the blocking block may be made of a single material of the same material as the rear body and the front body, a metal material including steel, or a polymer material including urethane, It may be made of a release material covering compound material.

As described above, according to one embodiment of the present invention, the grip portion of the lever plate protruding outward of the front body or the rear body can provide a stable grip performance to the operator.

In addition, according to the present embodiment, the first nozzle hole of the rear body and the second nozzle hole of the front body may coincide or be inconsistent with each other according to the rapid rotation of the levoplate, thereby rapidly blocking the transfer path of the compressed air and the abrasive. Can be.

In addition, in the present embodiment, since the interception block having relatively high abrasion resistance is attached to the block seating recess of the lever plate so as to be attachable, it is possible to replace only the interception block after a long time, And can be easily maintained.

Further, in the present embodiment, the handle of the lever plate is elongated from the center of rotation by the operator, so that it is relatively easy to rotate the lever plate and is easy to use.

In addition, this embodiment can prevent a safety accident in advance by immediately blocking the injection of the compressed air and the abrasive material by only rotating the lever plate.

1 is a perspective view of a blasting nozzle safety device according to one embodiment of the present invention.
2 is an exploded perspective view of the blasting nozzle safety device shown in Fig.
3 is a cross-sectional view of the blasting nozzle safety device shown in Fig.
4 is a front view for explaining the operation of the blast nozzle stabilizing device shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. Further, in the description of the present invention, if a detailed description of a related disclosure structure or function is found to obscure the gist of the present invention, a detailed description thereof will be omitted.

In the drawings, FIG. 1 is a perspective view of a blast nozzle safety device according to one embodiment of the present invention.

1, the present embodiment is characterized in that the front body 400 and the rear body 100 are detachable, and a safety means is interposed between the front body 400 and the rear body 100 .

The present embodiment is a blasting nozzle safety device connected to a hose (not shown) supplied with compressed air and abrasives. The blasting nozzle safety device includes a rear body 100 coupled to an end of a hose, a guide plate 200, a lever plate 300, And may include a body 400.

Here, the abrasive generally refers to a spray material such as sand, steel grit, garnet, and the like, and may be a material for polishing or grinding used in a normal blasting operation, .

The guide plate 200 may be fixed to the rear body 100 and the front body 400 may be fixed to the lever plate 300.

The lever plate 300 and the guide plate 200 are connected to a hinge pin (reference numeral 500 in FIG. 3) of the rotation center line CL and a guide pin Reference numeral 600) and the guide hole 231 may allow relative rotation or rotation within a finite angular range.

That is, the lever plate 300 is coupled with the hinge pin 500 so as to be rotatable on the guide plate 200, and the rotation can be guided by the guide pin 600 and the guide hole 231.

FIG. 2 is an exploded perspective view of the blast nozzle safety device shown in FIG. 1, and FIG. 3 is a cross-sectional view of the blast nozzle safety device shown in FIG.

2 or 3, the rear body 100 is connected to a hose (not shown) and may have a first nozzle hole 110 formed in the interior of the rear body 100.

The rear body 100 may include a hollow rear end portion 120 connected to the hose and a front end portion 130 formed integrally with the rear end portion 120 and having a large diameter.

The first nozzle hole 110 may be formed to penetrate along the longitudinal direction of the rear end portion 120 and the front end portion 130 so that the diameter of the hole at the rear end portion 120 is smaller toward the front end portion 130 It may have a lenticular shape.

The guide plate 200 includes an intermediate plate portion 210 coupled to the front end portion 130, a hinge plate portion 220 formed at one side of the intermediate plate portion 210, And a guide plate portion 230 having a guide plate portion 231.

The guide plate 200 includes a first passage hole 240 communicating with the first nozzle hole 110 of the rear body 100 and a second passage hole 240 formed through a bolt fastening hole 250 ).

A bolt threaded hole 150 may be formed in the front end portion 130 of the rear body 100 so that the rear body 100 is aligned with the bolt fastening hole 250.

The guide plate 200 may have a first hinge hole 221 penetrating in the thickness direction of the hinge plate 220.

The guide hole 231 corresponds to a curved long hole and may be formed in the guide plate 230 along the direction of drawing an arc with respect to the center of the hinge hole 221.

The lever plate 300 is formed at one side of the connecting plate 310 and the connecting plate 310 facing the guide plate 200, and coupled to the hinge pin 500 inserted into the first hinge hole 221. A pin hole 331 for coupling the handle 320 having the second hinge hole 321 formed therein with the guide pin 600 formed at the other side of the connecting plate 310 and inserted into the guide hole 231 is provided. It may include a guide plate portion 230 formed.

The hinge pin 500 or the guide pin 600 may include a pin body extending from the head and a nut screwed to the pin body.

The front body 400 is coupled to the lever plate 300 by using a plurality of bolts and bolt holes and is rotatable with the lever plate 300.

The front body 400 has a second nozzle hole 410 for spraying the compressed air and the abrasive.

The second nozzle hole 410 may have a hole shape in which the hole diameter on the rear end side (for example, on the side where the abrasive material enters) toward the front end in the spray direction increases toward the front end side (for example, the side where the abrasive material is ejected).

The second nozzle hole 410 of the front body 400 may coincide with the first nozzle hole 110 of the rear body 100 and the front body 400 and the lever plate 300 The first nozzle hole 110 and the second nozzle hole 110 can not be matched with each other.

The front body 400 and the rear body 100 may be made of a high-speed steel or a cemented carbide, which is a kind of cutting tool steel.

The lever plate 300 may further include a block seating groove 350 that substantially blocks the abrasive or compressed air and a blocking block 360 that is seated in the block seating groove 350.

The blocking block 360 may be made of the same or different material as the material of the front body 400 and the rear body 100.

For example, the entire body of the front body 400 and the rear body 100 may be made of cemented carbide, or the inside of the body where the first nozzle hole 110 and the second nozzle hole 410 are located may be made of cemented carbide, The outside of the body having a shape in which the portion made of cemented carbide is wrapped or the portion made of cemented carbide is fitted by assembling can be made of a light aluminum material.

The blocking block 360 may be made of a single material of a material of the same material as the front body 400 and the rear body 100, a metal material including steel, or a polymer compound material containing urethane, The polymer compound material may be formed on the outer surface of the polymer material.

More specifically, the blocking block 360 may be made of a cemented carbide or a boron carbide material by making the inside of the block and covering the inside of the block with a polymer material such as urethane.

The blocking block 360 may be formed with a second passage hole 361 coinciding with the first passage hole 240 of the guide plate 200.

The coupling plate portion 310 of the lever plate 300 is formed with an engagement hole 311 for inserting the protrusion 420 of the front body 400 into the second passage hole 361 of the blocking block 360 .

Hereinafter, the function of the present invention will be described.

4 is a front view for explaining the operation of the blast nozzle stabilizing device shown in Fig.

4, the handle 320 of the lever plate 300 may be positioned at the first position A in the initial state, and the first nozzle hole 110, The first passage hole of the guide plate 200, the second passage hole of the blocking block of the lever plate 300, and the second nozzle hole 410 of the front body 400 may be aligned with each other.

In this case, the blocking block of the lever plate 300 is connected to the first nozzle hole 110, the first passage hole, the second passage hole, and the second nozzle hole, which are the conveying paths of the compressed air and the abrasive, The compressed air and the abrasive are normally sprayed from the second nozzle hole 410, so that the blasting operation can be performed.

It is necessary to prevent emergency accidents by urgently blocking the injection of compressed air and abrasives due to the occurrence of an emergency situation during the execution of the blasting operation.

That is, the operator can hold the handle 320 of the lever plate 300 and rotate the lever plate 300 from the first position A to the second position B.

At this time, the guide pin 600 can be rotated about the hinge pin 500, and the guide pin 600 can be stopped at the hole end after moving along the guide hole 231.

In this case, since the blocking block of the lever plate 300 blocks the first passage hole of the guide plate 200, as a result, the first nozzle hole 110 and the second nozzle hole 410 are mismatched, And the ablation path of the abrasive material can be quickly cut off, and safety accidents can be prevented.

 The description above is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be construed as being included in the scope of the present invention.

100: rear body 200: guide plate
231: Guide hole 300: Lever plate
360: blocking block 400: front body
500: hinge pin 600: guide pin

Claims (7)

1. A blasting nozzle safety device connected to a hose to which compressed air and abrasive material are supplied,
A rear body that is mountably connected to the hose and has a first nozzle hole;
A guide plate fixed to the rear body;
A lever plate coupled to the guide plate by a hinge pin so as to be rotatable and guided by the guide pin and the guide hole; And
A blasting nozzle safety device comprising a front body fixed to the lever plate. The method of claim 1,
The rear body includes:
A hollow rear end connected to the hose;
A front end portion integrally formed at the rear end portion and having a large diameter; And
And a first nozzle hole formed to penetrate along the longitudinal direction of the rear end portion and the front end portion. 3. The method of claim 2,
Wherein the guide plate comprises:
An intermediate plate portion coupled to the front end portion and having a first passage hole communicating with the first nozzle hole;
A hinge plate formed on one side of the intermediate plate and having a first hinge hole; And
And a guide plate portion formed on the other side of the intermediate plate portion and having the guide hole. The method of claim 3, wherein
Wherein the lever plate includes:
A connecting plate portion facing the guide plate;
A handle portion formed at one side of the connecting plate portion and having a second hinge hole for engaging a hinge pin inserted into the first hinge hole; And
And a guide plate formed on the other side of the connecting plate portion and having a pinhole for engaging a guide pin inserted into the guide hole. 5. The method of claim 4,
The hinge pin or the guide pin includes a pin body extending from the head; And
And a nut screwed to the pin body. The method of claim 1,
Wherein the lever plate includes:
A block seating groove for blocking the abrasive or compressed air; And
And a blocking block seated in the block seating groove. The method according to claim 6,
The blocking block includes:
A material made of the same material as the rear body and the front body, a metal material including steel, and a polymer compound material containing urethane, or may be made of a single material such as a release material A blast nozzle safety device made of.

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