JPH11276832A - Recovery apparatus for fume dusts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a high recovery efficiency by a method wherein a first and a second screens which are arranged in two stages are provided, and fine dusts such as fume dusts or the like generated in arc welding operation are collected by being sucked together with surrounding air from a collection part by a negative pressure operation by operation of regular rotation of a blower. SOLUTION: A flexible hose 15 wherein a collection part 10 is provided at its tip part, a first screen 30 and a second screen 50 are successively arranged in series, and a roots blower 60 wherein reciprocally switching operation is enabled to be executed is connected thereto. For the first screen 30, an inside of a box body 31 is sectioned into a suction room 32 and a filter room 33 with a porous screen board 31a, that which is provided by filling a thin solid piece 35 of a ground product of a pet bottle or the like into a chemical fiber-made fabric bag 37 is made a first filter 34, and it is filled in the filter room 33. Further, for the second screen 50, a second filter 53 formed cylindrically by using a pleat-like nonwoven fabric of 0.1 to 0.5 μm mesh wherein Teflon coating is applied to its surface, is equipped to a filter support frame 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collecting machine for collecting fume dust and other fine dust generated during an arc welding operation.

[0002]

2. Description of the Related Art A combination of elements of various materials and a suction function by static electricity is used to collect fume dust and fine dust generated in stone polishing work using a blower such as a large air flow type turbo fan or a plate fan. Is conventionally used. These dust collectors have a wind volume of about 10 to 20 m ³ / min and a maximum negative pressure of 20 m ³ / min.
When the filter has a performance of 0 to 100 mmAq, if the filter is clogged, the air volume may be extremely reduced and fume may not be sucked. In order to prevent the filter from being clogged, a filter having a mesh of about 3 to 0.3 μm is used. However, the extremely fine fume dust of 1 to 0.01 μm generated at the time of arc welding can easily make the filter. Since it passes, the recovery efficiency is about 99.7%.

[0003]

In the above-mentioned conventional dust collector, if the wind speed passing through the filter is made to be about 0.01 m / sec, the collection efficiency of the fume dusts becomes about 99.9%. As a result, not only the device itself becomes larger, but also a new problem arises in that filter clogging proceeds in proportion to the elapse of the operation time. Also,
Various experiments have shown that fume dust immediately after collection is slightly viscous and thus adheres to the surface of the filter to cause clogging. In particular, fume dust generated during arc welding work is considered harmful to the human body,
If the worker inhales it for a long period of time, it may cause pneumoconiosis. For this reason, it can be said that the performance of the equipment for preventing the worker from sucking the fume dust as much as possible is also an important issue from the viewpoint of the working environment.
However, in the above-mentioned conventional dust collector, it is difficult to secure a collection efficiency of 99.9%, which is generally regarded as a safe level. The realization of has been desired.

An object of the present invention is to propose a fume dust collecting machine which improves the efficiency of fume dust collection and reduces the size and weight.

[0005]

According to a first aspect of the present invention, there is provided an apparatus for collecting fume dust, the apparatus comprising at least one collecting portion for collecting fume dust provided at a tip end.
A flexible hose of a book, a first screen provided with a first filter in which a solid piece as a crushed product of a plastic bottle is packed in a woven bag made of a synthetic fiber, and a mesh 0.1-1.0 coated with Teflon on the surface. A second screen provided with a second filter formed into a cylindrical shape using a 0.5 μm fold-shaped nonwoven fabric and a positive / reverse switchable positive displacement blower installed on a machine frame are sequentially connected in series. During the normal operation of the positive displacement blower, fume dust is collected from the collection unit, and at the time of the reverse operation, the outside air is discharged into the screen to clean each filter, and the cleaning is performed. A fume dust collecting machine, wherein a take-out container for collecting fume dust settled by the above-mentioned method is detachably provided on at least one of the screens, and the PET bottle in the first filter is provided. A solid synthetic sheet having elasticity is appropriately buried in the solid piece of the above, and the solid piece of the PET bottle is vibrated and adhered to the solid piece by vibrating the solid piece of the PET bottle by the pressure fluctuation action by the forward / reverse switching operation of the positive displacement blower. It is characterized in that fume dusts are peeled off.

According to a second aspect of the present invention, there is provided a fume dust collecting apparatus according to the first aspect of the present invention, which shuts off external air flowing backward when the positive displacement blower is operated in reverse. A sputter trap having a built-in butterfly check valve is attached between the flexible hose and the suction side of the first screen or the second screen, and a container for collecting the sputter to be sucked is freely detachable from the sputter trap. It is characterized by having been provided.

[0007] To achieve the same object, a portable fume dust collector according to claim 3 is provided on a suction side of a forward / reverse switching operable positive displacement blower installed on a stand with casters. A screen provided with a filter formed in a cylindrical shape using a pleated non-woven fabric having a mesh of 0.1-0.5 μm with a Teflon coating on the surface, and for shutting off external air flowing backward during the reverse operation of the positive displacement blower. A sputter trap with a built-in butterfly check valve
At least one flexible hose provided at the end with a collecting portion for collecting fume dust is connected in series with one another, and the fume dust is collected from the collecting portion at the time of forward rotation of the positive displacement blower. And a filter for discharging the outside air into the screen during the reverse operation to clean the filter, and a take-out container for collecting the fume dust settled by the cleaning is detachably provided on the screen. It is characterized by the following.

[0008]

The fine dust such as fume dust generated during the arc welding operation is sucked together with the surrounding air from the collecting part by the negative pressure action by the forward rotation operation of the positive displacement blower and collected. . In the stationary type fume dust collector, the first screen and the second screen are arranged in two stages, and in the compact portable fume dust collector, the fine dust is gradually captured by the single-stage screen. The cleaned air is discharged from the discharge port of the positive displacement blower to the atmosphere.

In the fume dust recovery apparatus according to the first and second aspects, when fume dust adheres to the filter and clogging occurs, a positive / reverse switching operation of the positive displacement blower is performed, and the pressure fluctuation action is performed. Thus, the solid piece of the PET bottle is vibrated by utilizing the elasticity of the coarse synthetic sheet. Thereby, peeling of fume dusts is promoted. Similarly, in the portable fume dust collector according to the third aspect, the outside air is forcibly discharged into the screen by the backwash function by the forward / reverse switching operation of the positive displacement blower. Is removed from the filter. Thus, the sedimented fume dust may be collected from the container in a timely manner.

Further, the sputter trap has a built-in butterfly check valve for shutting off outside air flowing backward during the reverse operation of the positive displacement blower, and is sucked together with the fume dust during the normal operation of the blower. The spatter collides with the check valve and falls, and then flows into the collection container.

The portable fume dust collecting device according to the third aspect can be moved to an arbitrary place, so that it is most suitable for a case where the generation of fume dust is small or in a narrow place. is there.

Therefore, according to the fume dust collecting apparatus of the present invention, dust such as fume dust can be collected with a high collection efficiency of 99.9% or more. In addition, the fume dust attached to each filter can be easily removed by the backwash function by the reverse operation of the positive displacement blower, sedimented fume dust can be taken out and collected from the container in a timely manner, and stable for a long time Dust collection performance can be maintained. Furthermore, in the case of a portable fume dust collection device that is reduced in size and weight, there is an advantage that convenience is excellent because the device can be easily moved to any place.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a part of a stationary type fume dust collector, which is cut away. FIG. 2 is a front view showing a part of a portable fume dust collector, which is cut away.
FIG. 3 is a front view showing a part of a portable fume dust collector in which the entire screen is inclined and cut away.

The general configuration of the stationary type fume dust collection machine A shown in FIG. 1 comprises a collection section 10 for collecting fine dust such as fume dust, a first screen 30, and a second screen 50 in order. These are arranged in series, and are composed of these and a roots blower 60 that enables a forward / reverse switching operation. here,
Although a roots blower is selected and described as a positive displacement blower, a twin screw type blower, a single-shaft rotary type blower, or the like can also be used.

The first screen 30 divides the inner space of the box 31 by a perforated partition 31a, and has a suction chamber 32 and a filter chamber 33. 5 consisting of crushed material such as polyethylene resin plastic bottles or other plastic materials
A first filter 34 is formed by packing a thin solid piece 35 having a size of about 10 to 10 mm into a woven bag 37 made of chemical fiber, and appropriately embedding an elastic coarse synthetic sheet 36 in the solid piece 35. This is filled in the filter chamber 33. Reference numeral 38 denotes an upper cover attached to the box 31.
The coarse synthetic sheet 36 is a filter medium made of a material obtained by foaming urethane foam, and is made of Everlight SF (Co., Ltd.)
Product HR-08 (Bubble number 6)
-10, sheet thickness 10 mm).

A plurality of, here, two, manual valves 41 for adjusting the amount of suction air are provided on the side of the suction port 32a of the suction chamber 32 on the side of the suction port 32a. Sputter trap 4 with built-in butterfly check valve 42a for shutting off backflowing outside air
2 are attached to the inlet side of the manual valves 41, respectively. 43
Is a collecting container for storing the sucked spatter by colliding and dropping it with the check valve 42a, and is provided in the trap body in a freely detachable manner by means such as screwing. Flexible hoses 15 are connected to the inlet side of the sputter trap 42, respectively.
0 is provided.

A fume dust recovery port 32b is provided below the box 31 in which the bottom plate 31b is inclined at an angle of about 45 °, and a rubber check valve 32c is provided in the recovery port 32b. Reference numeral 45 denotes a take-out container which is detachably provided by means such as a snap fastener 46 so as to air-tightly cover the recovery port 32b. The take-out container 45 is provided with a curtain plate 45a so that fume dust contained therein does not float by an air flow. Arrange as appropriate.

A filter support frame 52 is provided at the center of the box body 51 of the second screen 50, and the support frame 52 is provided with a mesh 0.1 to 0.5 with a Teflon coating on the surface.
A cylindrical second filter 53 made of a pleated nonwoven fabric of μm is attached, and a holding plate 54 is attached from above. Reference numeral 55 denotes a pipe connecting the intake port 51a of the box body 51 and the exhaust port 33b of the first screen 30.

A fume dust recovery port 56 is provided below the box body 51 in which the bottom plate 51b is inclined at an angle of about 45 °, and a rubber check valve 56a is provided in the recovery port 56. 5
Reference numeral 7 denotes a take-out container which is detachably provided by means of a snap fastener 58 or the like so as to air-tightly cover the recovery port 56. The take-out container 7 is appropriately provided with a curtain plate 57a so that fume dust contained therein does not float by an air flow. Arrange. The take-out container may have a drawer structure in addition to the detachable structure.

As the roots blower 60 installed on the machine frame 20 fixed to a factory floor or the like, a three-leaf type roots blower capable of switching between forward and reverse rotations is used.
During the reverse rotation operation, the suction side 61 becomes the discharge side, and the discharge side 6
2 is the suction side. 65 is a suction side 61 of the roots blower 60 and a filter support frame 5 of the second screen 50.
2 is a suction pipe connecting the exhaust side of No. 2. In addition, in order to start the inverter and control the inching operation of the motor device that drives the roots blower 60, it is also possible to provide an electrical box incorporating a dedicated sequence.

As described above, the fume dust is collected from the collection unit 10 during the forward rotation operation of the roots blower 60, and the outside air is discharged into the screens 50, 30 during the reverse rotation operation so that the filters 34, 53 are respectively discharged. A stationary fume dust collector A provided to wash the fumes is constructed.

FIG. 2 shows a portable fume dust collector B. The fume dust collector B is the first screen 30 of the fume dust collector A described above.
A series of structures excluding are installed on the gantry 120 with casters,
It is miniaturized and provided so as to be movable to an arbitrary place.
Specifically, the roots blower 160 is attached to a machine frame 121 which also serves as a discharge-side muffler fixed to a gantry 120 with casters.
The screen 150 is provided on the suction side 161 of the roots blower 160. 160a is the screen 15
0 is a motor of the roots blower 160 fixed to the side surface of the bottom blower 160. Like the fume dust collection machine A, the suction pipe 140 provided at the suction port 151a of the screen 150 is provided.
A manual valve 141 is attached to the
The sputter trap 142 and the flexible hose 115 are connected in series, and the tip of the hose 115 has a trumpet-shaped collection unit 1.
10 is provided. Regarding the other components, the reference numerals used for the description of the fume dust collection machine A are described in the drawings as reference numerals in the hundreds, and description thereof is omitted.

FIG. 3 shows a box 251 of the screen 250.
1 shows a portable fume dust collector C whose whole is inclined at an angle of about 45 °. This fume dust collection machine C
Has the same structure as that of the portable fume dust collector B except that the box 251 is inclined.
Therefore, for the same components as those described above, the reference numerals used in the description of the fume dust collection machine A are described in the drawings as reference numerals in the 200's, and the description thereof is omitted.

According to the fume dust collecting machines A to C having such a configuration, fume dust can be collected with a high collection efficiency of 99.9% or more. Furthermore, fume dust adhering to each filter is easily removed by backflow air action (backwash) due to the reverse operation of the roots blower, sedimented fume dust is taken out from the container in a timely manner, and stable collection over a long period of time. It is possible to maintain dust performance. In addition, in the case of a portable fume dust collector that is small and lightweight, it can be easily moved to any place, which is convenient.

In the above-mentioned stationary type fume dust collecting machine A according to the present invention, the comparative example (in the collecting machine A,
FIG. 4 shows the results of continuous operation tests performed during the manual arc welding work for the portable filter for the fume dust collector B (without the coarse synthetic sheet in the first filter).
Is shown in the graph. The welding rod used in the experiment: 4 mm in diameter, 450 mm in length, the number of welding rods used: 387, and the air volume of the roots blower: 2.0 m ³ / min. In the drawing, a to e indicate backwashing points, and at that time, five inching operations were performed.

As a result of the experiment, each of the dust collectors A and B of the present invention achieves a high collection efficiency of 99.9% or more, and appropriately performs a backwashing operation to eliminate and prevent clogging of the filter. As a result, it was confirmed that a stable degree of vacuum was obtained over a long period of time.

[Brief description of the drawings]

FIG. 1 is a front view of a stationary type fume dust collection machine with a part cut away.

FIG. 2 is a partially cutaway front view of a portable fume dust collector.

FIG. 3 is a front view showing a part of a portable fume dust collector in which the entire screen is inclined, with a part cut away.

FIG. 4 is a graph showing the results of continuous operation tests performed during manual arc welding on fume dust collectors A and B and a comparative example.

[Explanation of symbols]

A → Fume dust collection machine B, C → Portable fume dust collection machine 10 → Collection unit 15 → Flexible hose 30 → First screen 34 → First filter 35 → Solid piece 36 → Coarse Synthetic sheet 37 → Synthetic fiber woven bag 42 → Sputter trap 42a → Butterfly check valve 43 → Recovery container 45
57 → Removal container 50 → Second screen 53 → Second filter 60 → Roots blower (capacitive blower) 110 → Collection unit 115 → Flexible hose 142 → Sputter trap 120 → Caster mount 150 → Screen 15
3 → Filter 157 → Remove container 160 → Roots blower (capacitive blower)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshinobu Ito Kanie-cho, Kaifu-gun, Aichi Prefecture, Kanie-honmachi, Ho-no-ri, 160-1 Anlet Co., Ltd. (72) Inventor, Masami Kato, Kanie-cho, Kaifu-gun, Aichi Prefecture 160-1 Honmachi-no-Honai, Anlet, Inc. (72) Inventor Toshiaki Kato Kanie-cho, Kaifu-gun, Aichi-gun, Kanie-cho, 160-floor, 160th Anlet, Inc. (72) Inventor Koichi Kume, Aichi 160-1, Kanie Honcho, Kanie-cho, Kaifu-gun, Japan 160-in-1 Anlet Co., Ltd. (72) Inventor Takashi Yokoi Takashi Yokoi, Kanie-cho, Kaie-gun, Kaifu-gun, Aichi Prefecture 160-1, 1 in Anlet Co., Ltd. (72) The inventor Haruo Toya Kanie-cho, Kaifu-gun, Aichi Prefecture

Claims (3)

[Claims] At least one flexible hose provided with a collecting portion for collecting fume dust at its tip, and a solid piece as a crushed material of a plastic bottle packed in a bag of woven fabric made of chemical fiber. A first screen provided with one filter, a second screen provided with a second filter formed into a cylindrical shape using a pleated nonwoven fabric having a mesh of 0.1 to 0.5 μm with a Teflon coating on the surface, A positive-displacement switchable positive displacement blower installed on a frame is sequentially connected in series, and during the normal rotation operation of the positive displacement blower, fume dust is collected from the collection unit, and the reverse operation is performed. At times, outside air is respectively discharged into the screen to wash each filter, and a take-out container for collecting fume dust settled by the washing is detachably provided on at least one of the screens. A fume dust collection machine, wherein a coarse synthetic sheet having elasticity is appropriately embedded in a solid piece of a plastic bottle in the first filter, and a pressure fluctuation action by forward / reverse switching operation of the positive displacement blower is provided. Wherein the solid pieces of the PET bottle are vibrated so that fume dusts adhering to the solid pieces are peeled off. 2. A sputter trap having a built-in butterfly type check valve for shutting off outside air flowing backward during reverse operation of the positive displacement blower is provided on the suction side of the flexible hose and the first screen or the second screen. Attached between
2. The fume dust collecting apparatus according to claim 1, wherein a collecting container for the inhaled spatter is provided in the sputter trap in a freely detachable manner. 3. A cylinder using a pleated nonwoven fabric having a mesh of 0.1 to 0.5 μm and having a Teflon coating on the surface, on the suction side of a positive / reverse switching operable positive displacement blower installed on a stand with casters. A screen provided with a filter formed in a shape, a sputter trap having a built-in butterfly type check valve for shutting off outside air flowing backward during the reverse operation of the positive displacement blower, and a collecting part for collecting fume dust Is connected in series with at least one flexible hose provided at the distal end thereof, to collect fume dust from the collection section at the time of normal operation of the positive displacement blower, and at the time of reverse operation at the time of the reverse operation. Is provided in the screen to discharge the filter, and a take-out container for collecting the fume dust settled by the cleaning is detachably provided on the screen. Recovery equipment of portable fume dust such that characterized in that it comprises.