JPH04298212A - welding fume collector - Google Patents

Abstract

PURPOSE:To prevent welding operation efficiency from degrading and to reduce the running cost of a welding fumes collector by decreasing the exchanging or cleaning frequencies of filters. CONSTITUTION:A passage 14 for welding fumes having toothed ruggedness 15 on the inside surface of a suitable length, as shown in Fig. 1 (a), is inserted freely attachably and detachably before a mechanical filter or electrostatic filter, such as bag filter. The collector is so constituted that the welding fumes sucked by the action of a fan motor 5 for suction from a suction nozzle 1 placed near a welding point can pass the passage 14 for the welding fumes while making inertia collision against the toothed ruggedness 15 existing on the inside surface of the passage before these fuses are captured in the filter 4 by passing a hose 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding fume collector, and more particularly to a welding fume collector that can be replaced with a new one due to clogging of the filter or a decrease in dust collection efficiency, and that reduces the frequency of cleaning.

0002

2. Description of the Related Art Conventionally, welding fume collectors have been used in welding workshops to improve the working environment. Figure 3(a)
The welding fume collector includes a suction nozzle 1, a hose 2, a sputter trap 3, a filter 4, a suction fan motor 5, and a silencer 6. Also, the arrow
Indicates the direction of air flow. And in FIG. 3(b),
A welding workpiece 7, a welding torch tip 8, an arc 9, and a welding bead 10 are arranged, and the welding operator grasps the handle of the light-shielding surface 11 to shield his face 12 from the welding arc light, or holds it over his head and uses the welding torch. Have a good time. Welding fume 13 generated during welding is sucked from a suction nozzle 1 placed near the welding point by the action of a suction fan motor 5, passes through a hose 2, collides with a sputter trap 3, and is then collected by a filter 4. be done. In sputter trap 3,
Spatter having a mass larger than the welding fume 13 mixed into the welding fume 13 during suction is removed by collision.

0003

However, in the conventional configuration described above, when a certain amount of welding fume 13 is collected in the filter 4, clogging occurs in a mechanical filter such as a bag filter. Welding fume 13 cannot be sucked in at all. In addition, in the case of an electrostatic filter, the welding fume 13 may adhere to a thin electric wire (with a diameter of 0.5 mm or less) called an ionizer (not shown) that charges the welding fume 13, and the welding fume 13 may not be charged at all. become unable. As a result, the welding fumes 1
Reference numeral 3 denotes a suction fan motor 5 and a silencer 6, which is located behind the ionizer and does not sufficiently collect the charged welding fume 13 in a part called a collector (not shown) that electrostatically attracts and collects the charged welding fume 13. Since dust is discharged through the air, dust collection efficiency decreases, making it impossible to improve the working environment.

Therefore, the filter 4 that has collected a certain amount of welding fume 13 needs to be replaced with a new filter or cleaned, but the welding fume collector generally used in welding workplaces is Due to the large number of welding fume collectors and the need to avoid interference with crane work, many of them are small, lightweight, and movable.For this reason, the filters built into welding fume collectors are also naturally small, which means that welding fume collectors can be used to prevent welding fume from clogging. Those with a small storage capacity are often used. From the above, the frequency of filter replacement or cleaning will inevitably increase due to filter clogging due to welding fume collection and a decrease in dust collection efficiency, and the frequency of filter replacement or cleaning will inevitably increase. The problem is that the filter is often damaged, such as the filter being torn or the ionizer being disconnected, and the running cost of the welding fume collector is high.

The present invention solves the above-mentioned conventional problems by reducing the frequency of filter replacement or cleaning.
The purpose is to prevent a decline in welding work efficiency and reduce the running cost of a welding fume collector.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the welding fume collector of the present invention has a welding fume passage having tooth-like irregularities on the inner surface, which is formed by a mechanical filter such as a bag filter or an electrostatic type. It is installed in front of the filter.

[0007]

[Operation] With the above-described structure, the welding fume collector of the present invention is configured so that the welding fume sucked from the suction nozzle placed near the welding point by the action of the suction fan motor passes through the hose and is collected by the filter. The welding fume passes through a welding fume passage having tooth-like irregularities on its inner surface. At this time, the welding fume repeatedly collides with the tooth-shaped irregularities on the inner surface of the welding fume passage, and when sucked in near the entrance of the welding fume passage, the welding fume is The mixed spatter is removed. Then, while colliding with the tooth-shaped irregularities on the inner surface, the relatively heavy welding fume gradually adheres and accumulates in the recesses of the tooth-shaped irregularities due to contact due to inertial collision. As a result, the relatively heavy welding fumes that were conventionally collected by filters are removed in advance, reducing the burden on the filters and prolonging the time it takes for them to clog or reduce dust collection efficiency.
In other words, the filter's original function of collecting light and fine welding fumes is maintained for a long time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A welding fume collector according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1(a), reference numeral 14 denotes a welding fume passage having a tooth-shaped unevenness 15 as shown in FIG. 2(b) on the inner surface of an appropriate length, and is detachably inserted in front of the filter 4. place The welding fume sucked by the action of the suction fan motor 5 from the suction nozzle 1 placed near the welding point passes through the hose 2 and is collected in the filter 4 before being collected in the welding fume passage 14. It is configured so that it can pass through while colliding with inertia against the tooth-shaped unevenness 15 on the inner surface.

With this structure, the sucked welding fumes adhere to and accumulate in the recessed portions of the welding fume passage 14 in descending order of relative weight. and,
When the welding fume is sufficiently deposited in the recess, the welding fume passage 14 is removed from the welding fume collector and cleaned, and the welding fume deposited in the recess can be removed.

[0011] Cleaning can be done very easily by spraying water or air from the cross-sectional direction of the tooth-shaped irregularities 15, or by applying impact so that the cross-section of the tooth-shaped irregularities faces the direction of gravity. It is.

At this time, as shown in FIG. 2, the concave (or convex) portion on one of the opposing inner surfaces of the welding fume passage 14 is
It corresponds to the convex (or concave) part of the other surface, and the average distance between the planes of the inner surface having tooth-like irregularities is D.
and h/D is 1/30~, assuming the height of the tooth-like unevenness as h.
By configuring the length to be 1/5, a large amount of fume deposit can be obtained even if the length of the welding fume passage 14 is the same. And h/D from 1/30 to
The reason for limiting the range to 1/5 is that if it is less than 1/30, the height of the tooth-like unevenness is too low relative to the average distance between planes on the inner surface, and the welding fume has sufficient inertia to collide with the unevenness on the inner surface. This is because almost no deposits are deposited in the recesses, and 1
If it exceeds /5, welding fume passage 1 when sucking fume
This is because the pressure loss at step 4 only increases, and the amount of welding fume deposited in the inner recess hardly increases.

The cross-sectional shape of the tooth-like unevenness is shown in FIG. 2(b).
The effect is the same whether the shape is trapezoidal as shown in ) or rectangular as shown in FIG. 2(a).

[0014]

Effects of the Invention As is clear from the description of the embodiments above, according to the welding fume collector of the present invention, the welding fume passage having tooth-like irregularities on the inner surface can be formed using a mechanical filter such as a bag filter or a static filter. By removably installing it in front of the electric filter, it is possible to reduce the frequency of filter replacement or cleaning due to filter clogging and reduced dust collection efficiency, thereby preventing a decrease in welding work efficiency and improving the welding fume collector. Running costs can be reduced.

[Brief explanation of drawings]

FIG. 1(a) is a vertical cross-sectional view showing the concept of the structure of a welding fume collector in an embodiment of the present invention; FIG. Perspective view

[Fig. 2] (a) is an enlarged longitudinal cross-sectional view of a part of the welding fume passage having tooth-shaped irregularities on the same inner surface; (b) is an enlarged longitudinal sectional view of a part of the welding fume passage of another embodiment; Longitudinal sectional view shown as

[Figure 3] (a) is a vertical cross-sectional view showing the concept of the structure of a conventional welding fume collector; (b) is a side view showing an example of welding work using the same welding fume collector;

[Explanation of symbols]

4 Filter 14 Welding fume passage 15 Tooth-shaped unevenness

Claims (3)

[Claims] 1. A welding fume collector having a welding fume passage having tooth-shaped irregularities on its inner surface in front of a filter. 2. The welding fume collector according to claim 1, wherein one surface and the other surface of the opposing inner surfaces are configured to correspond to an uneven relationship. Claim 3: Let the average inter-plane distance of opposing inner surfaces be D,
3. The welding fume collector according to claim 1, wherein h/D is 1/30 to 1/5, where h is the height of the unevenness.