JP2559199B2 - Welding flue gas dust collector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding flue gas dust collector.

[0002]

2. Description of the Related Art In welding work, particularly in arc welding work, a large amount of smoke is emitted containing harmful dust such as spatter and fume, which may deteriorate work environment such as pollution of indoor air. is there. For this reason, conventionally, a welding flue gas dust collector is used to remove harmful dust from flue gas.

In the conventional welding flue gas dust collector, a method is generally used in which a dust collecting box equipped with a mesh filter is provided at the upper part of a work table, and a dust collector passes a duct to suck spatters and fumes generated during welding work. there were. In this device, dust such as spatter is collected in a dust collection box, and fumes are discharged outside the room. See also Kai 6
No. 2-41478, two rotatable rollers were wound around one end of the roller to wind a mesh formed into a band shape, and flue gas was passed through the mesh to form the mesh. There is also proposed a structure in which dust in flue gas is captured by a water film and the dust is collected in water by rotating a roller.

[0004]

However, in the former device, since the suction force is reduced due to the clogging of the mesh filter, it is necessary to make the blower large and to maintain the dust collection efficiency at regular intervals. Therefore, it is necessary to inspect and clean the mesh filters attached to the dust collecting box of each workbench.

Further, the latter device also requires a mechanical component such as a drive source and a roller for rotating the belt-like mesh, resulting in a high equipment cost and a need for regular maintenance and inspection.

The present invention has been made in view of the above-mentioned circumstances, and does not require enlargement of a blower, inspection and cleaning of a mesh filter or the like, use of a special drive source or mechanical parts, and maintenance and inspection, and a structure. It is an object of the present invention to provide a welding flue gas dust collector that is simple and that can reliably remove dust such as spatter from welding flue gas.

[0007]

In order to achieve the above object, the present invention proposes the following three means. According to a first aspect of the present invention, in a container for storing an incombustible liquid, an intake chamber for dividing the space above the liquid level into left and right to take in the exhaust gas and purified exhaust gas are exhausted from an exhaust port at the upper part of the container. And an upper partition plate that forms an exhaust chamber that forms a flow space for flue gas between the liquid surface and the lower end of the exhaust chamber.
The upper partition plate is disposed in the exhaust chamber with a space on the side of the upper partition plate, and the upper end of the upper partition plate has a liquid level so as to bounce up the noncombustible liquid by damming and deflecting the smoke exhausted through the flow gap. A lower partition plate which is projected upward, a scraping member which is formed above the lower partition plate in a projecting state from the upper partition plate, and scrapes off the incombustible liquid splashed up by the lower partition plate, and the lower partition plate. A drainage passage formed in the lower portion, which makes the intake chamber and the exhaust chamber communicate with each other under the liquid level; a blower disposed in the exhaust chamber to suck smoke and guide it to the exhaust port; A welding flue gas dust collecting apparatus is proposed, which is provided with a plurality of baffle plates which are arranged in a zigzag pattern in the vertical direction at intervals in the opposite wall direction and which meander the flue gas passage in the exhaust chamber. The second means proposes a welding flue gas dust collector in which the lower end of the upper partition plate is formed in a sawtooth shape so that the tip end thereof comes into contact with the liquid surface. The third means is that a splash wheel that stirs the incombustible liquid splashed by the lower partition plate is arranged in a space surrounded by the upper partition plate, the lower partition plate, and the scraping member. We propose a welding flue gas dust collector. A fourth means is provided with a drainage channel having a bottom surface that descends from the exhaust chamber to the intake chamber, and is formed of a mesh-shaped hollow box in front of the drainage port on the intake chamber side of the drainage channel. A sludge dust collecting device is detachably attached, and a sludge discharge door which is openable and closable is provided on the side surface of the intake chamber.

[0008]

According to the welding flue gas dust collector according to the first aspect of the present invention, when the flue gas taken into the intake chamber is sucked by the operation of the blower, the lower end of the upper partition plate and the liquid surface are contacted with each other. It is made to flow along the liquid surface from the intake chamber side to the exhaust chamber side by inserting the flow gap formed between. Then, the non-combustible liquid that is in contact with the air flow of the exhaust gas formed in the flow gap is also moved to the exhaust chamber side. In the exhaust chamber, a lower partition plate is arranged on the side of the upper partition plate, so that the lower partition plate blocks and deflects the air flow of the flue gas and the non-combustible liquid, so that the non-combustible liquid is moved upward. Will be jumped up to. Then, the splashed-up incombustible liquid is scraped off by the scraping member, and is circulated in a shower shape between the lower partition plate and the scraping member. As a result, the flue gas passes through the non-combustible liquid and is sucked into the exhaust chamber, and the dust contained therein is removed by the non-combustible liquid during the passage. Further, the exhaust gas sucked into the exhaust chamber is meandered by the baffle plate when passing through the exhaust chamber, and after the baffle plate captures the non-combustible liquid that is formed into a mist and is circulated with the exhaust gas, The purified smoke is discharged from the discharge port on the top of the container. Further, since the drainage passage is provided, the liquid levels on the intake chamber side and the exhaust chamber side are kept constant. As a result, the noncombustible liquid can be uniformly splashed without changing the size of the flow gap. Further, according to the welding flue gas dust collector according to the second means of the present invention, the lower end of the saw-toothed upper partition plate whose tip is in contact with the liquid surface periodically forms the wideness in the flow gap. Then, the liquid surface is fluctuated by disturbing the flue gas flow in the wake of the flow gap. As a result, the movement of the non-combustible liquid to the exhaust chamber side is promoted, and the splashing of the non-combustible liquid by the air flow of the exhaust gas is promoted. Further, according to the welding flue gas dust collecting apparatus according to the third means of the present invention, the splash wheel for stirring the incombustible liquid splashed by the lower partition plate, the upper partition plate, the lower partition plate, Since it is arranged in the space surrounded by the scraping member, the entire space is filled with the shower of the nonflammable liquid by the stirring action of the splash wheel, and the dust contained in the smoke is removed. The effect is improved.
Further, according to the welding flue gas dust collector according to the fourth means of the present invention, since the drainage passage having the inclined bottom surface that descends from the exhaust chamber to the intake chamber is provided, When the dust removed from the exhaust chamber is scraped off into the non-combustible liquid on the exhaust chamber side, it is settled on the intake chamber side along the gradient of the drainage passage. Then, the sludge dust collecting member formed of a mesh-shaped hollow box attached in front of the drainage port on the intake chamber side collects the sludge as sludge, and the sludge dust collecting member can be easily removed together with the sludge dust collecting member. Become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the welding flue gas dust collector according to the present invention will be described below with reference to FIGS. In each of these drawings, reference numeral 1 is a welding flue gas dust collector, 2 is a container, 3 is a partition wall (upper partition plate), 4 is an intake chamber, 5 is an exhaust chamber, 6 is an intake port, 7 is an exhaust port, 8 Is a sirocco fan (blower), 9 is a partition member (upper partition plate), 10 is a flip-up member (lower partition plate), 11 is a partition plate, 12 is a lower space,
13 is an intake chamber tank, 14 is a central tank, 15 is an exhaust chamber tank, 16
Is a drainage channel (drainage channel), 17 is a scraping member, 18 is a baffle plate, and 19 is a smoke exhaust channel (circulation gap).

As shown in FIG. 1, the welding flue gas dust collector 1 of this embodiment has a partition wall 3 (which is disposed downward from a top plate 2a in a container 2 formed in a box shape). It has an intake chamber 4 and an exhaust chamber 5 which are divided into left and right parts by an upper partition plate. The partition wall 3 is arranged so as to connect the one wall surface of the container 2 facing each other, and the intake chamber 4 and the exhaust chamber 5 are in communication with each other only in the lower portion of the container 2. An intake port 6 connected to a suction duct, which will be described later, is disposed in the intake chamber 4 at an upper portion thereof. Further, the exhaust chamber 5 is provided with an exhaust port 7 communicating with an external space in an upper portion thereof, and inside the exhaust port 7, exhaust gas G in the exhaust chamber 7 is sucked to exhaust the exhaust gas G. A sirocco fan 8 (blower) for discharging from 7 is provided.

The partition wall 3 extends downwardly from the exhaust chamber 5.
Is formed so as to narrow, and is formed in a shape that is bent vertically downward in the lower part,
A partition member 9 (upper partition plate) attached to extend the partition wall 3 is arranged at the lower end thereof. Like the partition wall 3, the partition member 9 is formed to have a length dimension capable of connecting one opposing wall surface of the container 2 so as to partition the intake chamber 4 and the exhaust chamber 5. Further, one edge portion 9a of the partition member 9 to be arranged on the lower side when attached to the partition wall 3
For example, as shown in FIG. 2, it is formed in a saw-tooth shape by arranging a plurality of triangular irregularities in series.

In the exhaust chamber 5, a flip-up member 10 (lower partition plate) is arranged at a substantially parallel interval to the partition member 9,
Further, a partition plate 11 is arranged in the intake chamber 4 with a space substantially parallel to the partition member 9. The flip-up member 10
Is an upper end surface 10a arranged above the lower end 9a of the partition member 9 and a vertical surface 10b opposed to the partition member 9.
And a sloped surface 10c that is smoothly connected below the vertical surface 10b and that descends from the exhaust chamber 5 side toward the intake chamber 4 side. The sloped surface 10c is arranged so as to pass below the partition member 9 and to straddle the intake chamber 4 and the exhaust chamber 5. The partition plate 11 is a flat plate-shaped member having an upper end surface 11a arranged above the lower end 9a of the partition member 9.

The flip-up member 10 and the partition plate 11
Is arranged so as to connect one opposite wall surface of the container 2 in the same manner as the partition wall 3, and the lower space 12 of the container 2 is divided into an intake chamber tank 13, a central tank 14, and an exhaust chamber tank 15. It is designed to be partitioned. Further, the intake chamber tank 13 and the exhaust chamber tank 15
Means a drainage channel 16 (drainage channel) formed in a state of penetrating the flip-up member 10 and the partition plate 11 in the vicinity of the bottom surface of the container 2, and the intake chamber tank 13 and the central tank 14 are connected to the partition plate 11. The communication holes 11b are formed so as to communicate with each other.

Above the flip-up member 10, a flat plate-shaped scraping member 17 formed in a projecting state from the partition wall 3 into the exhaust chamber 5 is arranged in the form of sunlight so as to cover it. Its tip is arranged above the exhaust chamber 15. Flat baffle plates 18 are provided above the flip-up member 10 and on the inner wall surface 5a of the exhaust chamber 5 facing the flip-up member 10, respectively. The baffle plate 18 formed on the inner wall surface of the exhaust chamber 5 is
The baffle plates 18 and the tips of the scraping members 17 are arranged horizontally in a zigzag manner by being arranged above the scraping members 17 and formed on the partition wall 3 above the scraping members 17. They are arranged so that they overlap each other. Furthermore, these baffle plates 1
8 and the scraping-off member 17 are inclined so as to descend toward the tip in the projecting direction, and the tip is formed in a shape bent vertically downward.

By injecting water into the container 2 thus formed, the welding flue gas dust collector 1 is constructed. Water is the lower end 9 of the partition member 9.
The water is injected until the water level is brought into contact with the sawtooth-shaped irregularities formed in a. Then, when water is injected, a minute flue gas flow passage 19 (circulation gap) between the lower end 9a of the partition member 9 and the water surface W for allowing flue gas G to circulate.
Are formed. The smoke exhaust passage 19 has sawtooth-shaped irregularities formed on the lower end 9a of the partition member 9,
A plurality of triangular holes surrounded by the water surface W are formed so as to be arranged in the longitudinal direction of the partition member 9. Also, container 2
When water is poured inside, the partition plates 11 and the upper end surfaces 11a, 10a of the flip-up members 10 are made to project from the water surface W in the intake chamber 4 and the exhaust chamber 5, respectively.

Welding flue gas dust collector 1 constructed as described above
Are, for example, as shown in FIG.
Is used in a dust collection system 22 in which a suction duct 21 that communicates with the above is connected to the intake port 6. That is, the exhaust chamber 5
By operating the sirocco fan 8 provided in the upper portion, the exhaust gas G containing dust such as spatter and fume generated in each welding work table 20 is sucked into the suction duct 21.
Is introduced into the intake chamber 4 through the intake port 6.

The flue gas G introduced into the intake chamber 4 is circulated downward in the intake chamber 4 and then passes through the flue gas passage 19 formed by the partition member 9 and the water surface W. Distributed. Since the flue gas flow passage 19 is narrow, the flue gas G flowing through the flue gas flow passage 19 has its flow velocity increased by narrowing the flow passage area. Since one surface of the smoke exhaust flow path 19 is constituted by the water surface W, the exhaust gas G whose flow velocity has been accelerated has absorbed the water in contact with the air flow of the exhaust gas G from the intake chamber 4 to the exhaust chamber 5. Move to the side. Then, the moved water is lifted up by the flip-up member 10 arranged on the exhaust chamber 5 side along the sloped surface 10c, and splashed vertically upward by the vertical surface 10b connected to the sloped surface 10c. Will be raised. As a result, a shower-like water flow S is formed between the flip-up member 10 and the scraping member 17 arranged above it.

Here, in the welding flue gas dust collector 1 of this embodiment, since the lower end 9a of the partition member 9 is formed in a sawtooth shape, the flue gas G in the wake of the flue gas flow passage 19 is formed. Of the exhaust gas flow path 19 and the water surface W which is in contact with the air flow of the exhaust gas G is swayed. Therefore, the water is easily moved to the exhaust chamber 5 side by the air flow of the flue gas G, and the flip-up member 10
This will help the splashing of water.

The shower-like water flow S thus formed is arranged so as to block the flow of the flue gas G introduced into the exhaust chamber 5 side. When passing through, the contained dust is captured and purified by the water stream S. In addition, the shower-like water flow S
When part of the water flow S is formed, a part of the water flow S becomes a mist and is circulated along with the exhaust gas G toward the exhaust port 7. However, in the exhaust chamber 5, the baffle plates 18 are arranged in a staggered manner. Therefore, the flue gas G is caused to flow while meandering in the exhaust chamber 5, and at that time, the mist-like water is captured by the baffle plate 18. As a result, even if fine dust is not removed by the shower-like water flow S, when the mist-like water is captured in the exhaust chamber 5, it is captured by the baffle plate 18 together with the water. As a result, the flue gas G discharged from the exhaust port 7 is surely purified.

On the other hand, the water which has been bounced up by the bounce up member 10 and has captured the dust of the exhaust gas G is scraped off by the scraping member 1.
It is scraped off by 7, and most of it is dropped into the exhaust chamber tank 15. The mist-like water captured by the baffle plate 18 becomes water droplets.
It will flow down along the route 8 and be dropped into the exhaust chamber tank 15. Even in this case, the exhaust chamber tank 15 and the intake chamber tank 13 are communicated with each other by the drainage channel 16, and the central tank 14 and the intake chamber tank 13 are communicated with each other by the communication hole 11b. The water levels are kept the same. Therefore, the flow area of the smoke exhaust passage 19 is always kept constant, and a uniform shower-like water flow S is formed.

The dust captured by the water stream S is
Although it will be made to settle in each tank 13,14,15, a fine thing may be floated on the water surface W in some cases. In this case, since the partition plate 11 is arranged between the intake chamber tank 13 and the central tank 14 so as to project from the water surface W, dust floating on the water surface W of the intake chamber tank 13 However, the dust that has already been captured from the flue gas G is prevented from entering the water flow S without flowing into the central tank 14. Therefore, a shower-like water flow S formed between the flip-up member 10 and the scraping member 17
Is always reduced in the amount of dust, so the smoke emission G
It is possible to achieve reliable purification without re-contamination.

FIG. 4 shows a welding flue gas dust collector 3 according to the present invention.
Another embodiment of 0 is shown. In this embodiment, the lower partition plate 10
Splashing wheel 2 that stirs the incombustible liquid that has been splashed up by
3 is provided in a space surrounded by the upper partition plate 9, the lower partition plate 10, and the scraping member 17. Also,
Bottom surface 1 descending from the exhaust chamber 15 toward the intake chamber 13
6a is provided, and a sludge collecting member 24 formed of a mesh-shaped hollow box is detachably attached in front of the drainage passage 16 on the suction chamber 13 side of the drainage passage 16 and the suction chamber A sludge discharge door 31 is provided on the side wall surface 13 a of the reference numeral 13.

According to the welding flue gas dust collector 30 of this embodiment, the water raised along the inclined surface 10c of the lower partition plate (bounce member) 10 is agitated by the splash wheel 23 to move upward. Since the shower-like water flow S is filled in the space surrounded by the partition plate 9, the lower partition plate 10, and the scraping member 17, the flue gas G is contained when passing through the space. The dust that is being generated by the water stream S more reliably,
It will be captured and purified. The scraping member 17 and the baffle plate 18 allow the exhaust chamber 15
The dust dropped onto the exhaust chamber tank 15 is allowed to settle in the exhaust chamber tank 15. Since the bottom surface 16a of the drainage channel 16 is provided with a slope, the drainage port 16 on the intake chamber tank 13 side is formed along the slope.
It flows into the sludge dust collecting member 24 formed of a mesh-shaped hollow box provided in front of b and is accumulated in the sludge dust collecting member 24. Then, when a certain amount of dust is accumulated, the water surface W is raised and the smoke exhaust passage 1
9 is changed, and the shower-like water flow S formed is changed, but the accumulated dust is removed from the sludge discharge door 31 of the intake chamber tank 13 periodically or as needed. By removing 24 together with the outside of the container 2 and performing a cleaning operation, the dust collection performance can be maintained in a constant state for a long period of time.

The welding flue gas dust collector 1.30 of the present invention
In that case, the following techniques can be adopted. Although the one edge portion 9a of the partition member 9 is formed in a sawtooth shape having triangular irregularities, instead, it is formed in a sawtooth shape having irregularities of any shape or a straight line having no irregularities. thing. Although the baffle plate 18 is arranged on the partition wall 3 and the inner wall surface 5 a facing the partition wall 3, instead of this, it may be arranged on another wall surface in the exhaust chamber 5. Arrange any number of them. Blower 8 was a sirocco fan, but any blower should be used instead. Although water was used as the non-combustible liquid stored in the container 2, instead of this, any non-combustible liquid should be adopted.

[0025]

As described above in detail, in the welding flue gas dust collector according to the first means of the present invention, the space above the liquid surface is divided into the intake chamber and the exhaust chamber in the container, An upper partition plate whose lower end is close to the liquid surface to form a flue gas circulation gap, and an incombustible liquid that is placed on the side of the exhaust chamber that holds the flue gas inserted through the circulation gap to splash up the noncombustible liquid. The lower partition plate, a scraping member that is formed to cover the upper part of the lower partition plate and scrapes up the incombustible liquid that has been splashed up, and an exhaust that connects the intake chamber and the exhaust chamber below the liquid surface below the lower partition plate. A liquid passage and a blower that sucks smoke and guides it to the exhaust port.
Since a plurality of baffle plates which are arranged in a staggered manner on the opposite wall surfaces in the exhaust chamber and meander the insertion path of the smoke exhaust, the following effects are achieved. A blower that sucks in the flue gas splashes up the non-combustible liquid and passes the flue gas through it to remove the dust.Therefore, in addition to the blower, special drive sources, mechanical parts and consumables are required. In addition, maintainability, durability and reliability can be improved. Since the baffle plate in the exhaust chamber captures the mist-like incombustible liquid that is directed to the exhaust port together with the exhaust, even fine dust can be removed, and smoke can be reliably purified. In the welding flue gas dust collector according to the second means of the present invention, the lower end of the upper partition plate forming a flow gap between the upper surface and the liquid surface is formed in a sawtooth shape so that the tip thereof comes into contact with the liquid surface. Because
In addition to the effect of the first means, the flue gas flow that is passed through the circulation gap is disturbed in the subsequent flow, and the splashing of the noncombustible liquid is promoted, so that the flue gas purification can be promoted. Has the effect. In the welding flue gas dust collector according to the third means of the present invention, the flywheel that agitates the incombustible liquid splashed by the lower partition plate includes the upper partition plate, the lower partition plate, and the scraping member. Since it is arranged in the enclosed space, the whole space is filled with the shower of the noncombustible liquid by the stirring action of the splash wheel, and the dust contained in the flue gas is captured more reliably. It has the effect of being removable. Further, since the welding flue gas dust collector according to the fourth means of the present invention is provided with the drainage passage having the inclined bottom surface that descends from the exhaust chamber to the intake chamber, it is removed from the flue gas. When the generated dust is scraped off into the incombustible liquid on the exhaust chamber side, it is settled on the intake chamber side along the gradient of the drainage passage. Since a sludge dust collecting member formed of a mesh-shaped hollow box is attached in front of the intake chamber side drain port, dust is accumulated inside the sludge dust collecting member. Since the sludge discharge door that can be opened and closed is installed on the side of the intake chamber, the dust collection performance can be kept constant over a long period of time by removing it from the sludge discharge door regularly or when necessary. The effect that it can be maintained in a state is produced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a welding flue gas dust collector according to the present invention.

FIG. 2 is a perspective view showing the shape of an upper partition plate of the welding flue gas dust collector of FIG.

FIG. 3 is a perspective view showing an example of a dust collection system in which the welding flue gas dust collector of FIG. 1 is used.

FIG. 4 is a vertical cross-sectional view showing another embodiment of the welding flue gas dust collector according to the present invention.

[Explanation of symbols]

1.30 Welding flue gas dust collector 2 Container 4 Intake chamber 5 Exhaust chamber 6 Intake port 7 Exhaust port 8 Blower 9 Upper partition plate 9a Lower end 10 Bounce member (lower partition plate) 16 Drainage channel (drainage channel) 16a Bottom surface 17 Scraping member 18 Baffle plate 19 Smoke exhaust flow path (circulation gap) 31 Sludge discharge door G Smoke exhaust S Water flow W Water surface (liquid level)

Claims (4)

(57) [Claims] 1. An air-intake chamber in which a space above the liquid surface is divided into left and right sides for taking in exhaust smoke and an exhaust chamber for exhausting purified exhaust air from an exhaust port in the upper part of the container in a container for storing incombustible liquid. And an upper partition plate that forms a flow passage for smoke exhaust with the liquid surface by making the lower end thereof close to the liquid surface, and at the side of the upper partition plate with a space provided in the exhaust chamber. A lower partition plate whose upper end is projected above the liquid surface so as to bounce up the non-combustible liquid by blocking and deflecting the smoke exhausted through the flow gap, and above the lower partition plate. And a scraping member that is formed so as to project from the upper partition plate and scrapes off the incombustible liquid splashed up by the lower partition plate, and an intake chamber and an exhaust chamber below the liquid surface that are formed below the lower partition plate. Disposed in the exhaust chamber and a drainage path communicating with the And a plurality of baffle plates that are arranged in a zigzag pattern in a vertical direction on a pair of opposing wall surfaces in the exhaust chamber and that meander the exhaust gas passage in the exhaust chamber. A welding flue gas dust collector characterized by being provided with. 2. The welding flue gas dust collector according to claim 1, wherein the lower end of the upper partition plate is formed in a saw-tooth shape such that the tip of the upper partition plate comes into contact with the liquid surface. 3. A splash wheel for stirring the incombustible liquid splashed up by the lower partition plate is provided in a space surrounded by the upper partition plate, the lower partition plate and the scraping member. The welding flue gas dust collector according to claim 1 or 2, characterized in that. 4. A sludge formed of a mesh-shaped hollow box in front of a drainage passage having a bottom surface that descends from an exhaust chamber to an intake chamber, and in front of the drainage port on the intake chamber side of the drainage channel. 4. The welding exhaust smoke collector according to claim 1, wherein the dust collecting member is detachably attached and a sludge discharge door which can be opened and closed is provided on a side surface of the intake chamber. Dust equipment.