JPH0839255A - Suction nozzle of smoke, gas and the like - Google Patents

Abstract

PURPOSE:To obtain a nozzle of light weight, portable, capable of easily/surely mounting/dismounting in welding on site, movable, easy mounting and having good suction efficiency in the suction nozzle to suck/remove smoke, gas, etc., generated in welding of piping. CONSTITUTION:In the suction nozzle 3 to suck/remove smoke, gas, etc., generated in welding of piping, etc., the suction nozzle 3 is formed to a wide circular arc shape of dual layer structure in which a front lower wall 6 is formed along part of the exterior of piping 2 and a guide grove to guide smoke, gas, etc., is arranged inside, a suction port of hose is connected to the side, the suction port of hose is communicated to the guide groove and a suction body to suck piping attachable/detachable is arranged at the lower face of lower wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction nozzle for sucking and removing smoke, gas, etc. generated during welding work of piping.
The present invention relates to a suction nozzle that is lightweight and portable, can be easily and reliably mounted and dismounted at a welding work site, is easy to move and install, and has good suction efficiency.

[0002]

2. Description of the Related Art Conventionally, during arc welding work of pipes, a smoke mask is carried and used to protect the work environment from smoke, gas, etc. generated from antioxidants, etc.
A duct equipped with a suction nozzle, such as a trumpet-shaped, flat-shaped, or flanged suction device, for sucking and removing smoke, gas, etc. generated when collecting and discharging with a dust blower after filtering with a filter. Install the (hose) above the place where the welding work is performed, decompress the inside of the duct (hose) with the decompression suction device attached to the rear end of the duct (hose), and smoke, gas, etc. from the suction nozzle. Although there is a large suction device that sucks in and removes it through a duct (hose), the trumpet-shaped suction nozzle has the drawback that it only diffuses smoke and gas and cannot perform effective suction and discharge. It was

[0003]

In the conventional large-sized suction device of this type, it is difficult to install a large pipe-type suction nozzle in a narrow space, and the installation direction (angle) of the suction nozzle is limited. As a result, there is a drawback that the usage range is narrow. And the thick suction pipe narrows the field of view of the operator,
Since it is an obstacle to welding work and it is heavy, it is difficult for one worker to handle when installing, so it is not easy to install the suction nozzle at an appropriate position, and it is difficult to move the welding work site. There is a drawback of. Especially the site is narrow,
In addition, in the case of welding work at high places, dust-proof measures that efficiently protect construction site workers and surrounding workers from smoke, gas, etc. improve the site work environment and improve worker safety and work efficiency. There was a problem that was difficult to achieve, while being strongly advertised for the purpose.

Furthermore, in the general nozzle as described above, since the suction area is small and the suction angle of the suction nozzle is narrow, the range of use is limited. Since the installation position of the suction nozzle has to be changed frequently as the welding point moves, it is difficult to move and the work efficiency is poor. In addition, the conventional suction device has a problem in that it cannot move along with the movement of the welding point by the worker because the suction is performed only in a certain direction, and the suction efficiency also decreases.

Therefore, the present invention has been made in order to solve the problems that the conventional suction nozzle has, and it is made portable by reducing the weight and the size, and even in a narrow working place. Even if there is, the suction nozzle can be moved freely regardless of the welding point, and the suction nozzle can be easily and surely
It can be easily attached to any position, up, down, left, or right, and by performing efficient suction work and environment-friendly welding work,
Particularly, the safety of the worker is ensured in a high place or a narrow work place, and the visibility of the worker is not hindered, so that the work efficiency can be improved.

The suction nozzle of the present invention is of one type,
For example, 60φ, 80φ, 100φ, 150φ, 200φ
It can be used for several types of pipes with different outer diameters, etc., it can also be installed on irregularly shaped pipes such as elbow pipes, and since the suction range of the suction nozzle can be adapted to a wide range, as the welding point moves, the suction nozzle You don't have to change the position of
There are various advantages such as the suction of welding fume.

[0007]

The structure of the present invention for achieving the object will be described with reference to FIGS. 1 to 6 corresponding to the embodiments. In the suction nozzle 3 for sucking and removing gas and the like, the suction nozzle 3 has a front lower wall 6 formed in a shape along a part of the outer shape of the pipe 2 and provided with a guide groove 11 for guiding smoke, gas and the like therein. In addition, the suction port of the hose 4 is connected to the side end so that the suction port of the hose 4 and the guide groove 11 communicate with each other, and the pipe 2 is removably adsorbed to the lower surface of the lower wall 6. A suction nozzle 3 for smoke, gas, etc., characterized in that an adsorbent 13 is provided.

[0008]

Since the present invention has such a structure, the suction nozzle 3 can be freely carried and transported while the hose 4 is connected by reducing the weight and the size, and the welding point is particularly high. For example, it is a field work that can be freely and frequently moved regardless of the welding point which has been considered difficult in the past, and it is easy by simply adsorbing the suction nozzle 3 to the optimum point of the pipe 2 with the adsorbent 13 such as a magnet. In addition, it is possible to securely fix, smoke and gas can be easily and surely removed by suction, and by performing efficient suction work and welding work in an environment, the safety of workers especially in high places can be improved. It is possible to secure and improve work efficiency.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing an embodiment of the present invention, and FIG. 1 is a plan view showing a use state of the suction nozzle of the present invention. 2 is a plan view of the suction nozzle of the present invention, FIG. 3 is an enlarged front view showing a main part of the suction nozzle of the present invention, FIG. 4 is an AA enlarged cross-sectional view of FIG. 3, and FIG. FIG. 6 is a cross-sectional view of the suction nozzle of the present invention when used for piping.

The suction nozzle 3 of the present invention comprises a lower wall 6, an upper wall 7,
Smoke inside by the rear wall 8, the tip side wall 9, and the hand side wall 10,
A guide groove 11 for guiding gas or the like is formed. The side wall 10 of the suction nozzle 3 has an opening 12 at the center which communicates with the suction port of the hose 4.

The outer periphery of the hose 4 near the suction port is fastened to the outer periphery of the side wall 10 of the suction nozzle so that the guide groove 11 of the suction nozzle 3 and the inside of the hose 4 communicate with each other. The other end of the hose 4 is detachably attached to the vacuum suction device 5.

For sucking smoke, gas, etc., a double-layer wide arc-shaped suction nozzle 3 mounted along the pipe 2, a hose 4 connected to the suction nozzle 3, and the suction nozzle 3 via this hose 4. It operates with a small-sized and portable vacuum suction device 5 using decompressed air, similar to a household electric vacuum cleaner that operates.

The double-layered suction nozzle 3 having a wide arc shape has a wide lower flat wall 6 having a front lower wall formed substantially along a part of the outer diameter of the pipe 2, and a lower wall 6 having a circular arc shape. An arc-shaped upper wall 7 that is narrower than the width of the lower wall 6 at a predetermined distance from the wall 6, and a tip side wall 9 that connects the left side end that connects the upper wall 7 and the rear end of the lower wall 6 with each other. The right side wall 10 is formed by connecting the right side end of the wall 6 and the right side end of the upper wall 7.

As described above, the outer shape of the suction nozzle 3 is along the outer diameter of the pipe 2, and the suction airflow from the decompression suction device 5 is along the inside of the arc-shaped nozzle 3 and the outer diameter of the pipe 2 from the root of the nozzle 3. Be guided to the tip. Then, the tip portion is tapered to increase the suction force.

The lower portion of the lower wall 6 has an arc shape which is substantially the same as the outer diameter of the pipe 2, and the suction nozzle 3 is located between the pipe 2 and the suction nozzle 3.
The inflow of air from the side opposite to the welding point at the position is blocked, and the suction force on the welding point side is improved.

The suction nozzle 3 is provided with one or more adsorbents 13 such as magnets and suction cups for adsorbing to the pipe 2 on the lower surface of the lower wall 6, and as shown in FIG. 5, the suction nozzle is of one type. so,
For example, 60φ, 80φ, 100φ, 150φ, 200φ
It can be evenly adsorbed and used on several types of pipes with different outer diameters, and can also be installed on odd-shaped pipes such as elbow pipes.

As described above, the suction nozzle 3 can sufficiently cope with a slight change in the outer diameter of the pipe 2. However, if the outer diameter of the pipe 2 greatly changes, the outer diameter of the pipe 2 can be changed. According to the above, the suction nozzle 3 can be replaced and attached. At that time, the hose 4 may be integrally attached to the suction nozzle 3 or may be a separate body. Further, if a rotary shaft is attached between both the adsorbents 13 so that the main body of the suction nozzle 3 can be bent, the suction can be ensured.

In use, first, the suction nozzle 3 connected to the decompression suction device 5 via the hose 4 is arranged near the welded portion of the pipe 2 and is adsorbed to the pipe 2 by the adsorbent 13. Then, after the smoke, gas, etc. generated by the welding work are once guided to the guide groove 11, they are sucked into the hose 4 and operated so that the vicinity of the welding point is always kept free of smoke, gas, etc.

The opening of the suction nozzle 3 is provided on the outer wall side of the suction nozzle 3 and the welding point side. An upper wall 7 is provided on the welding point side, the upper wall 7 is narrower than the lower wall 6, and an opening 12 on the welding point side is formed between the outer wall of the pipe 2 and the upper wall 7.

When the suction nozzle 3 is attached to the opening 12 of the outer wall of the pipe 2, the outer wall of the pipe 2 becomes a part of the outer wall of the suction nozzle 3 and contributes to the suction force of the opening 12 from the welding point side.

The (reduced pressure) air flow from the suction device 5 from the root of the suction nozzle 3 toward the tip part is partially changed in direction when passing through the opening 12 at the lower part of the welding side upper wall 7 on the side surface of the air flow. , Create a suction airflow to the welding point side. By this separated air flow, a suction force is generated in the entire welding point side opening 12.

By attaching the upper wall 7, the entrapment of air from the outside of the upper wall 7 is reduced, and the suction force from the suction port at the lower portion of the upper wall 7 to the welding point is improved. When the width of the upper wall 7 is set to be smaller than that of the lower wall 6, the suction force from the welding point side opening 12 is made uniform. Further, as shown in FIG. 6, by bending the edge of the upper wall 7 into an eaves shape with a roundness 15, smoke, gas, etc. flowing into the guide groove 11 can be smoothly sucked in without generating turbulence or vortex. it can.

Further, as shown in FIG. 5, the shape of the tip portion from the root of the suction nozzle 3 is gradually tapered. This reduces the decrease in the flow velocity due to the distance and the reduction in the flow velocity due to the separation of the air flow into the opening 12, prevents the turbulence of the air flow and the generation of vortices, and averages the flow velocity at each part of the opening 12. It has become.

Further, as shown in FIG. 5, the suction nozzle 3
By providing the partition 14 from the root of the pipe to the outer wall of the pipe 2, it is possible to prevent the smoke, gas, and the like that are sucked in from leaking.

Due to the unique shape of the suction nozzle of the present invention described above, this suction nozzle 3 can obtain a suction force evenly at any position of the suction port on the lower portion of the arc-shaped upper wall 7 along the welding line. It is also possible to secure a long suction area.

Although the examples considered to be typical of the present invention have been described above, the present invention is not necessarily limited to the structures of these examples, and has the above-mentioned constitutional requirements of the present invention, and The present invention can be carried out by appropriately modifying it within a range that achieves the object of the present invention and has the following effects.

[0027]

As described above, the suction nozzle of the present invention is
The following effects can be revealed. Since the structure is simple and the weight is small, the structure can be freely moved to the welding point and the suction is surely performed. Therefore, the safety of the worker can be improved and the work efficiency of the welding work can be greatly improved. By disposing the adsorbent 13, the pipe 2 can be detachably adsorbed. The suction nozzle 3 and the hose 4 can be freely carried and transported, and particularly in welding work in high places and in narrow places, the suction nozzle 3 can be fixed only by adsorbing it to an optimum place of the pipe 2.

Since it is lightweight, downsized, and portable, it can be moved freely regardless of the welding location, and the suction nozzle 3 can be reliably attached, so that the suction work can be performed efficiently and the welding work can be performed in an environmentally friendly manner. By doing so, it is possible to ensure the safety of the worker, especially in high places, and improve the work efficiency. In this way, the suction airflow from the vacuum suction device 5 is guided to the tip from the root of the nozzle 3 along the inside of the arc-shaped nozzle 3 and the outer diameter of the pipe 2. The inflow of air from the side opposite to the welding point at the position of the suction nozzle 3 between the pipe 2 and the suction nozzle 3 is prevented, and the suction force on the welding point side is improved. The tip can be tapered to increase the suction force.

With the adsorbent 13 including a magnet and a suction cup, the suction nozzle is of one type and can be evenly adsorbed and used on several types of pipes having different outer diameters, and can also be installed on odd-shaped pipes such as elbow pipes. . The suction nozzle 3 connected to the vacuum suction device 5 via the hose 4 is arranged in the vicinity of the welded portion of the pipe 2, and the suction member 13
Smoke adsorbed to the pipe 2 by the
After the gas or the like is once guided to the guide groove 11, it can be sucked into the hose 4 and the vicinity of the welded portion can be constantly maintained in a state free from smoke and gas. When the suction nozzle 3 is attached, the outer wall of the pipe 2 becomes a part of the outer wall of the suction nozzle 3 and contributes to the suction force of the opening 12 from the welding point side.

10 The (reduced pressure) airflow from the suction device 5 from the root of the suction nozzle 3 toward the tip portion partially changes its direction when passing through the opening 12 at the lower part of the welding-side upper wall 7 on the airflow side surface. To create a suction air flow to the welding point side. By this separated air flow, a suction force can be uniformly generated in the welding point side opening 12 in general. 11 By attaching the upper wall 7, it is possible to reduce the entrainment of air from the outside of the upper wall 7 and improve the suction force to the welding point from the suction port in the lower portion of the upper wall 7. 12 When the width of the upper wall 7 is set, the width of the lower wall 6 is made narrower to form the guide groove 11, which helps to make the suction force from the welding point side opening 12 uniform.

13 By rounding the edge of the upper wall 7 and bending it into an eaves shape, smoke, gas, etc. flowing into the guide groove 11 can be smoothly sucked in without generating turbulence or vortex. 14 The shape of the suction nozzle 3 from the root to the tip is gradually tapered to reduce the decrease in the flow velocity due to the distance and the decrease in the flow velocity due to the separation of the air flow into the opening 12, and the turbulence and vortex of the air flow can be reduced. Can be prevented and the flow velocity at each part of the opening 12 can be averaged. 15 By providing the partition 14 between the root of the suction nozzle 3 and the outer wall of the pipe 2, it is possible to prevent the smoke, gas, etc. sucked from leaking.

16 Due to the unique shape of the suction nozzle of the present invention described above, this suction nozzle 3 obtains a suction force evenly at any position of the suction port on the lower portion of the arc-shaped upper wall 7 along the welding line. It is possible to secure a long suction area. That is, the conventional one has a remarkable effect that cannot be expected.

[Brief description of drawings]

FIG. 1 is a plan view showing a usage state of a suction nozzle of the present invention.

FIG. 2 is a plan view of the suction nozzle of the present invention.

FIG. 3 is an enlarged front view showing a main part of the suction nozzle of the present invention.

FIG. 4 is an enlarged sectional view taken along line AA of FIG.

FIG. 5 is a vertical sectional view in which the suction nozzle of the present invention is applied to pipes having different diameters.

FIG. 6 is a view showing an end face of a cross section of the suction nozzle of the present invention.

[Explanation of symbols]

 (1) Entire suction device for sucking smoke, gas, etc. (2) Piping (3) Suction nozzle (4) Hose (5) Decompression suction device (6) Lower wall (7) Upper wall (8) Rear wall (9) Tip side wall (10) Hand side wall (11) Guide groove (12) Opening (13) Adsorbent (14) Partition (15) Rounded edge

Claims (8)

[Claims] 1. A suction nozzle 3 for sucking and removing smoke, gas, etc. generated during welding, etc., wherein the suction nozzle 3 has a front lower wall 6 formed in a shape along a part of the outer shape of a pipe 2, A wide arc shape of a double layer provided with a guide groove 11 for guiding smoke, gas, etc. is formed, a suction port of the hose 4 is connected to a side end, and the suction port of the hose 4 and the guide groove 11 are communicated with each other. A suction nozzle (3) for smoke, gas, etc., characterized in that an adsorbent (13) that removably adsorbs to the pipe (2) is arranged on the lower surface of the lower wall (6). 2. The suction nozzle 3 provided with an adsorbent 13 comprises:
The suction nozzle 3 for smoke, gas, etc. according to claim 1, wherein the pipe 2 to be welded is adapted to be attached to and detached from various outer diameters. 3. The suction nozzle 3 for smoke, gas, etc. according to claim 1 or 2, wherein the shape of the tip portion from the root of the suction nozzle 3 is gradually tapered. 4. The opening of the suction nozzle 3 is provided on the pipe 2 outer wall side of the suction nozzle 3 and on the welding point side, and the upper wall 7 is provided on the welding point side, and the upper wall 7 is wider than the lower wall 6. 4. A narrow opening 12 between the outer wall of the pipe 2 and the upper wall 7 forms a welding point side, and when the suction nozzle 3 is attached, the outer wall of the pipe 2 becomes a part of the outer wall of the suction nozzle 3. A suction nozzle 3 for smoke, gas, etc. 5. A suction nozzle 3 connected to a vacuum suction device 5 via a hose 4 is arranged in the vicinity of a welded portion of the pipe 2,
5. The suction nozzle 3 for smoke, gas, etc. according to any one of claims 1 to 4, wherein the suction nozzle 3 is adsorbed to the pipe 2 by an adsorbent 13. 6. The smoke according to claim 1, wherein the width of the upper wall 7 is set narrower than that of the lower wall 6, and the upper wall 7 is provided with a guide groove. Suction nozzle 3 for gas, etc. 7. The suction nozzle 3 for smoke, gas, etc. according to any one of claims 1 to 6, wherein the upper wall 7 has a rounded edge and is bent into an eaves shape. 8. The suction nozzle 3 for smoke, gas, etc. according to claim 1, wherein a partition 14 is provided between the root of the suction nozzle 3 and the outer wall of the pipe 2.