JPH038342Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a workbench equipped with a workbench that can collect welding dust generated during welding work while extinguishing spatter (welding sparks) that is generated at once. This article relates to a wet type dust collector.

[Conventional technology]

Since the fume contained in the dust generated during welding work is ultra-fine, it is usually disclosed in Japanese Patent Publication No. 51-39708 or Utility Application No. 56-60687 (Utility Model Application No. 173817). As seen in microfilm, a canopy hood is installed on the workbench, and dust is collected directly by attaching an electric precipitator or back filter dust collector to this hood. However, if the fume itself is flammable, such as the fume generated by welding using inert gas such as carbon dioxide gas welding, if the dust air to be sucked contains spatter, This spatter can ignite the fume and cause a fire, so conventionally, there was no space between the hood and the dust collector.
A fire in the dust collector was prevented by installing a baffle plate inside or connecting a pre-dust box with a cyclone inside to extinguish the spatter.

However, even if a pre-dust box is connected in the middle, as time passes, the fume mentioned above will gradually adhere to and accumulate on the air duct leading to the pre-dust box and the inner wall of the hood, making it easy to ignite. Therefore, if the spatter is sucked in, it will come into contact with the accumulated fume and immediately catch fire, and the pre-dust box will not be able to extinguish the sparks, which will instead ignite the accumulated fume inside the box. As the flames flared up even more, the sparks were carried by the suction gas flow and sent into the dust collector, where they spread to the filter and the like, and in the end, the entire inside of the dust collector often caught fire.

Therefore, instead of the above pre-dust box,
For example, by attaching a water storage pipe (water tank) seen in Utility Model Application Publication No. 7207 of 1978 between the hood and the dust collector, and passing welding dust (dust air) through the water contained in this water storage pipe. They were trying to extinguish the spate ivy.

[The problem that the idea attempts to solve]

However, even if the dust air is passed through the water in the water storage pipe, the problem is that the spatter is wrapped in water bubbles and passes through the water without being extinguished with the dust air, and is sucked into the dust collector side, causing a fire. It was hot.

Therefore, the technical problem of this invention is to safely extinguish spatter that has been sucked in together with dust so as not to cause a fire, and to prevent fumes from adhering to it.
It is an object of the present invention to provide a wet type dust collector with a workbench in which the rate of accumulation is reduced.

[Means to solve the problem]

The measures taken in the present invention to solve the above technical problems are as follows.

(1) An air intake port shall be provided on the upper side of the workbench with the front side open and the remaining three sides surrounded by a hood, and an air intake duct leading to the above air intake port shall be installed vertically on the back side of the hood.

(2) On the lower side of the workbench, there is a container for filtering water whose bottom part is connected to the above-mentioned intake duct via a communication duct, and the upper opening of this container is connected to the intake duct through the above-mentioned intake port. A primary filter is provided to separate moisture from the dust air sucked through the duct and filtration water, and an upper chamber connected to the top side of the container collects dust from the dust air that has passed through the primary filter. A wet type dust collector shall be provided with a secondary filter constructed using a non-combustible porous material.

(3) Similarly, a fan is attached to the lower part of the workbench to exert a suction effect on the upper chamber of the wet type dust collector through an intake duct, and a fuse-type fire damper is installed in the middle of the intake duct. thing.

[Effect]

The above means works as follows.

The factor (1) above is that the intake duct leading to the dust collector is integrated on the back side of the hood, which eliminates the hassle of duct construction and makes it possible to keep the space occupied by the duct and equipment as compact as possible. Since the above-mentioned intake duct is installed vertically, the accumulation of dust is almost eliminated, and spatter contained in the dust air can be dropped directly into the water of the dust collector.

The factor (2) above can be extinguished by passing the spatter sucked in together with the dust air through water, while the dust air that has passed through the water is drained by a primary filter to separate moisture, and then The next filter collects the duct and moisture,
Furthermore, spatter that has passed through the water and the primary filter without being extinguished while being wrapped in foam is
A secondary filter constructed using a non-combustible porous material extinguishes this, making it possible to prevent the occurrence of fire.

The above element (3) makes it possible for the fire damper to melt and close the intake duct in the event that spatter overheats the secondary filter, thereby protecting the subsequent dust collector from fire.

As described above, the above-mentioned technical problem can be solved by the above-mentioned means, and the problems of the conventional technology can be solved.

〔Example〕

Fig. 1 is a front view showing an example of a wet type dust collector with a workbench according to the present invention, and Fig. 2 is a sectional view taken along line A-A of the device. In the drawing, 1 shows the entire dust collector, 2 a welding work chamber, 3 a welding workbench surrounded on three sides by a hood 3a, and 4 a dust-containing air opening in the upper side of the welding work chamber 2. The intake port 5 is an intake duct installed vertically on the back side of the welding work chamber 2 so as to be connected to the suction action 4, and its lower end port 5a is installed on the lower side of the work table 3. It is connected to a communication duct 11D which leads to a bottom container 11 of the wet type dust collector, generally indicated by the reference numeral 10. Further, reference numeral 5b denotes an opening/closing door for inspection provided on the back side of the intake duct 5 in order to remove fumes that have adhered or accumulated inside the intake duct 5.

The container 11 containing the filtered water W for extinguishing spatter is connected to the dust collector 1 as shown by the imaginary line in FIG.
The inside of the main body 10T is configured to be removable from the main body 10T of 0, and its interior includes a weir plate 12 connected diagonally to the lower end opening 5a and a partition plate 13 vertically installed approximately in the center. As shown in the figure, the intake chamber 11A is divided into three chambers: a right-hand intake chamber 11A that directly communicates with the intake duct 5 via a communication duct 11D, a central recovery chamber 11B, and a left-hand water supply chamber 11C.
A wide weir plate 12 is provided between the collection chamber 11B and the recovery chamber 11B.
The collection chamber 11B and the water supply chamber 11C are connected to each other by the lower part interval 12A, and the collection chamber 11B and the water supply chamber 11C are connected to each other by an extremely narrow interval provided at the lower end of the partition plate 13 to allow water to pass through. 13A.

In FIG. 2, the reference numeral 15 indicates a float-type water supply valve device disposed in the water supply chamber 11C.
When the float 15a floating on the water surface in 1C sinks due to a decrease in the filtration water W, the valve 15b is opened to supply water from the water supply pipe 16 to the water supply chamber 11C, and the water supply causes the float 15a to float to a certain position. Then, the valve 15b is closed to stop the water supply, and therefore, the amount of filtration water W stored in the container 11 is always maintained at a constant reference amount by the water supply valve device 15. There is.

Reference numeral 17 denotes a primary filter installed at the top opening of the recovery chamber 11B, and the water for filtration W stored in the container 11 is filtered through the float type water supply valve so that the water surface is always slightly below the filter 17. Device 1
5, the amount of water is kept constant. The above-mentioned primary filter 17 is connected to the container 1 when suctioning dust-containing air.
1. That is, the spring flow WX of the water for filtration W in the recovery chamber 11B is suppressed, and the dust-containing air that has passed through the water is drained to separate moisture.

Reference numeral 18 denotes a secondary filter installed in the upper chamber 10A of the container 11, and a filter made of a nonflammable porous material such as ceramic balls is used, for example. Further, 19 is a suction port opened to the upper chamber 10A, 20 is a suction duct, and 21 is a suction duct 20.
A fuse-type fire damper installed in the middle of the
2 is a suction fan rotated by a motor 23, 24 is an exhaust port, and 25 is an exhaust duct.

Since the wet type dust collector with a workbench according to the present invention has the configuration as described above, when the motor 23 is started and the fan 22 is rotated, a suction action is applied to the intake port 4 through the filtration water W in the container 11. Therefore, the dust air generated by the welding work in the work chamber 2 enters the container 11 from the intake port 4 through the intake duct 5 as shown by the arrow, and is sucked together with the dust air by passing through the water. The spatter caused by this will be extinguished.

Further, the dust air that has passed through the water is drained and moisture is separated when it passes through the primary filter 17, and then, after the dust and moisture are collected by the secondary filter 18, it is passed through the suction duct from the suction port 19. 20 and is sucked into a bag filter dust collector (not shown) or the like from an exhaust port 24 and an exhaust duct 25,
It is cleaned here.

Furthermore, if spatter is not extinguished because it is enveloped in foam together with the dust air and passes through the water and through the primary filter, the nonflammable porous material of the secondary filter 18 extinguishes the spatter. . Furthermore, in the unlikely event that spatter occurs on this secondary filter 18,
Even if it overheats, this heat causes the fire damper 21 to melt and close, closing the suction duct 20, thereby preventing a fire from occurring in the subsequent bag filter dust collector.

On the other hand, when the amount of water in the container 11 decreases due to evapotranspiration or the like, the float 15 of the float type water supply valve device 15
a catches this, opens the valve 15b, and supplies water until the filtration water W reaches a fixed amount, but the valve device 1
Water supply chamber 1 of container 11 with float 15a of No. 5 floating
1C only communicates with the recovery chamber 11B through a narrow water inlet 13A provided at the lower end of the partition plate 13, so even if the water supply chamber 11C receives suction from the fan 22, there will be no dust in the water in the water supply chamber 11C. There is no ventilation action that sucks air, and therefore, the water surface of the water supply chamber 11C on which the float 15a is floating does not cause a violent upwelling WX like the water surface of the recovery chamber 11B, and maintains a flat state suitable for opening/closing control. can.

〔effect〕

Therefore, according to the wet type dust collector with a workbench of the present invention, even if spatter is sucked together with dust air, the filtration water in the container will eliminate the spatter, and the primary and secondary filters will be removed. Then, a fuse-type fire damper can back up this and protect the following dust collector from fire.

In addition, in this invention, the workbench used for welding etc. and the wet type dust collector are integrated, and the suction port for suctioning dust air is built into the upper side of the workbench, eliminating the need for any troublesome piping. In addition to being able to perform various tasks such as suction with great efficiency,
The dust air sucked in from the suction port passes through the suction duct installed vertically on the back of the hood and is sucked directly into the water in the container, so the suction path is extremely short and the rate at which fume adheres and accumulates is reduced. The amount of spatter is extremely small, and the spatter can be dropped directly into the water without coming into contact with the fume that has adhered or accumulated, so it can be used safely without worrying about the spatter igniting the fume in the intake duct and causing a fire. It is very suitable for use in welding work and polishing work.

[Brief explanation of drawings]

FIG. 1 is a front view of a wet type dust collector with a workbench according to the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. 1 is a dust collector, 2 is a work room, 3 is a work table, 3a
is a hood, 4 is an intake port, 5 is an intake duct, 10 is a wet type dust collector, 10A is an upper chamber, 11 is a container, 17 is a primary filter, 18 is a secondary filter,
20 is a suction duct, 21 is a fuse type damper, 22 is a fan, and W is water.

Claims (1)

[Scope of utility model registration request] An intake port is provided on the upper side of the workbench with the front side open and the remaining three sides surrounded by a hood, and an intake duct leading to the abovementioned intake port is installed vertically on the back side of the hood, while the lower side of the workbench is In this case, the bottom part is connected to the above-mentioned intake duct through a communication duct as a container for filtration water, and the dust air sucked from the above-mentioned intake port through the intake duct, the communication duct, and the filtration water is collected from the top surface of the container. A primary filter for separating moisture is provided, and the upper chamber connected to the upper surface of the container is made of a nonflammable porous material that collects dust from the dust air that has passed through the primary filter. A wet type dust collector is equipped with a secondary filter, a fan is attached to the upper chamber of the wet type dust collector to exert a suction effect through an intake duct, and a fuse type fire damper is installed in the middle of the intake duct. A wet type dust collector with a workbench characterized by: