JPH06226028A - Dust removing device - Google Patents

Abstract

PURPOSE:To improve the working environment of a stone mill, etc., by effectively capturing dust, such as stone powder, generated at the time of grinding stone. CONSTITUTION:A projecting part 300 is provided nearer the working surface side than the lower part of a body 100 capturing and holding the stone powder according to the operation of an exhaust fan 200 and the upper part thereof is opened to receive the stone powder falling together with the sucked air. Water is passed from a water source 303 so that the stone powder is entrained in the air flow and the water flow and is introduced into the body 100. The water is made into drops by a throttling part 131 in the body and a water film is formed by an arced plate 101 so that the stone powder is captured on the water drops and the water film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removing device,
For example, the present invention relates to a dust removing device suitable for removing dust such as stone powder (hereinafter referred to as stone powder) generated in the process of stone polishing.

[0002]

2. Description of the Related Art Stone powder generated in the polishing process of stone materials and plastic powder generated in the polishing process of plastic molded products,
Alternatively, dust such as fibers generated in the spraying process of various fibers such as glass has a serious adverse effect on the human body, such as causing pneumoconiosis, so it is strongly recommended to remove them effectively to improve the working environment. Is requested. As a device for removing such dust, there are various devices such as a dust collector that utilizes electrostatic force, but recently, since it is possible to simply and effectively remove, a paint mist is used in the field of coating technology. Some of the water-washing type coating rooms used for the purpose of collecting have been converted. Here, as a typical example of the coating chamber, there is provided a chamber-shaped main body (booth) having an opening substantially in front of the object to be coated, and an exhaust fan mounted on the main body. Means for forming an air flow from the vicinity of the installation position of the coating object toward the opening in accordance with the operation of, and introducing the paint mist generated in the coating process into the booth, while forming a water flow or water film in the booth. There is one that is designed to collect paint mist in water.

[0003]

However, since the coating mist is generally extremely fine and has a small specific gravity, it can be easily carried by the air flow flowing in a substantially horizontal direction toward the opening in front of the object to be coated. Although it can be effectively collected in the coating room, when it is diverted to a dust removing device, it is difficult to get into the airflow flowing horizontally because the specific gravity of dust such as stone powder is large There were many particles that fell to the part, and it was not always possible to achieve a sufficient dust removal effect. In view of such problems, an object of the present invention is to make it possible to effectively remove dust such as stone powder and to realize a good working environment.

[0004]

To this end, the dust removing device of the present invention comprises a chamber-shaped main body, exhaust means for exhausting the main body, and an overhanging portion projecting from the lower portion of the main body to the work surface side.
An opening provided in the overhanging portion and opened upward; a gutter-shaped member provided along the edge of the opening for supplying water to the inside of the opening; A water flow plate provided inward, and an introduction member for introducing the water flowing along the water flow plate and the air sucked from the opening in association with the operation of the exhaust means into the main body, An introducing member having a narrowed portion at the introducing portion, an arc-shaped member having a curvature surface having an arcuate cross-section, which is provided in the main body continuously with the introducing member, and provided on the downstream side in the exhaust direction from the separating member
It is characterized by comprising a separating member for separating water containing dust and air, and a means provided below the separating member for holding the separated water.

[0005]

According to the present invention, the opening on the upper side of the work surface side overhanging portion of the lower part of the main body is provided so as to receive the falling dust, and the dust is introduced into the main body by the water flow and the air flow, and the throttling part is formed. Water is made into droplets and collected on a water film. Further, the water containing dust is separated from the air by the separating member so as to be retained in the main body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic side sectional view showing an embodiment of the dust removing device of the present invention. The apparatus of this example has a chamber-shaped main body 10
0, an exhaust fan 200 provided in the upper part for exhausting the inside thereof, and an overhang part 300 projecting from the lower part of the main body 100 to the work surface side (the left side in the drawing). Along with the opening 30 of the overhang portion 300
Inhale air from 1 with dust.

The projecting portion 300 has an opening 301 opened upward so as to receive stone powder falling from a stone material 402 placed on a turntable 401 indicated by a chain double-dashed line and used for polishing work, for example. is doing. Also, the opening 30
1 is configured to feed inward. Further, a water flow plate 305 is disposed inside the opening 301, and the water channel 303 is formed.
The supplied water is guided into the main body 100. The water flow plate 305 is arranged with an appropriate inclination in order to smoothly introduce the water flow into the main body 100 and to prevent the accumulation of stone powder or the like that may fall into the water flow on the water flow plate 305. However, the inclination angle can be appropriately determined according to the specific gravity of the stone powder or the like to be removed and the exhaust capacity of the exhaust fan. Further, the water channel 303 may be formed as an open water channel extending over the entire length of the peripheral portion of the opening 301, or may be formed so that water can overflow only in a required portion.
Reference numeral 307 denotes a gallery portion for taking in the stone powder scattered outside the opening 301 and other floating stone powder due to polishing work or the like. However, the gallery portion 307 does not need to be arranged if such scattering or floating of stone powder is not recognized.

Reference numeral 130 denotes a connecting portion between the projecting portion 300 and the main body 100, and the bottom surface thereof is a water flow plate 305 in the projecting portion 300.
And a plate 101 having an arcuate cross section in the main body 100. In addition, the upper surface of the connecting portion is bent at the terminal end of the connecting portion 130 located in the main body 100 in order to perform fluid throttling, and the bent portion 131 is formed to have an appropriate protrusion such as a sawtooth shape or a comb tooth shape. There is. Body 10
An eliminator 103 for removing water containing stone powder from the air stream is provided on the downstream side of the arc-shaped plate 101 in 0 in the exhaust direction, that is, in the present embodiment, above the tangential direction of the end of the arc-shaped plate 101. The eliminator 103 prevents passage of water droplets by forming a curved flow path, and may be, for example, plate-shaped members formed in a substantially U shape and superposed with their postures aligned. Only one eliminator 103 may be provided as long as it can obtain a sufficient effect, but it can be provided further on the downstream side in the exhaust direction as needed, and the case where two eliminators 103 are provided is shown as an example. There is. Below the eliminator 103, a gutter-shaped water channel 105 along the inner wall of the main body and a water storage layer 107 at the bottom of the main body.
Is provided, and these are separated from the air by the eliminator 103 to store the falling water, and
It forms a means for collecting dust contained in the water. That is, in the case of this example, since the target of collection is stone powder having a larger specific gravity than water, the stone powder taken in by the sedimentation of the stone powder at the bottom of these is held in the main body 100.

In this embodiment, the water channel 105 in the main body and the water channel 303 in the overhang portion are partially communicated with each other, and water is circulated from the former to the latter. In this example, as shown in the figure, an opening 109 is provided on the bottom surface of the water channel 105 in the main body so that the precipitated stone powder falls into the water storage tank 107.
The concentration of stone powder contained in the water stored in No. 5 or in the water flowing back to the overhang portion water channel 303 is made small. Further, in this example, the bottom surface of the connecting portion 130 or the portion of the arc-shaped plate 101 continuous with the bottom portion is made slightly lower than the water level of the water storage tank 107 during the operation of the apparatus, and the opening 111 is provided in that portion. Water in a state of being clearer than 111 is introduced into the arc-shaped plate 101, so that the concentration of stone powder in the water introduced from the water flow plate 305 is reduced.

In the above structure, by driving the exhaust fan 200, the air flows in the direction indicated by the bold arrow. Here, the hatched arrow indicates the air flow containing stone powder, and the so-called white arrow indicates the cleaned air flow. That is, the air sucked from the opening portion 301 of the overhanging portion 300 and the gallery portion 307 together with the falling stone powder passes from the water flow board 305 through the connecting portion 130 to the main body 1.
00, and entrains water droplets generated by the squeezing effect of the bent portion 130, while colliding with the water film formed by the arc-shaped plate 101. Further, after reaching the eliminator 103 and separated from water, the exhaust fan 200 discharges the water to the outside of the apparatus. Further, due to the action of the flow of air and the like, water circulates in the apparatus as shown by a solid line arrow without pumping means such as a pump. That is, the overhang portion 300
The water overflowing from the open surface of the water channel 303 of the
It drops upward, flows along the inclination of the water flow plate 305, and is introduced into the main body 100 via the connecting portion 130. Here, since the airflow or the water flow is suddenly narrowed by the bent portion 133 provided at the main body side end portion of the connecting portion 130, or the water flow collides with the ridge, the atomization or the droplet formation is prevented. The generated mist or water droplets are inserted into the airflow that has passed through the arc-shaped plate 101. Further, a water film is formed by the arc-shaped plate 101. During this process, the stone powder contained in the air stream is collected in water in the form of mist or drops, and on the other hand, in the water film. Thus, the water containing the mist-like or droplet-shaped stone powder that has been carried above the arc-shaped plate 101 by the air flow and the water separated from the arc-shaped plate 101 reach the eliminator 103,
Here, it is separated from the air flow, falls into the water channel 105 and the water storage tank 107, and is stored therein. Further, the water stored in the water channel 105 will flow back to the overhang portion water channel 303 via the lower communication path.

As described above, in this example, water is circulated and used. However, since the concentration of stone powder content is increased by simply circulating the water, as described above, the opening 10 on the bottom of the water channel 105 is used.
9, the settling stone powder is discharged to the water storage tank 107 side, and the water in the supernatant state is sucked up from the arc-shaped plate opening 111 using the pressure difference. That is, in this example, by circulating and using water whose stone powder content concentration has been reduced as much as possible, the stone powder is effectively introduced into the main body 100 by the air flow and the water flow without lowering the intake and exhaust efficiency, and the collection thereof. It is something to do. The present invention is not limited to the above-described embodiments described with reference to the drawings, and it goes without saying that appropriate modifications can be made or appropriate means can be added. For example, in connection with the water storage tank 107, a means (suction means) for removing the precipitated stone powder or a means (opening / closing means, etc.) for facilitating the removal work can be provided. Further, instead of providing the opening 109 in association with the water channel 105 in the main body, a means for removing precipitated stone powder or a means for facilitating the removal operation may be provided. Further, in the figure, the main body water channel 105 and the overhang portion water channel 303 are communicated with each other at the lower portion, but the communication portion is not necessarily limited to the illustrated portion, and an appropriate portion that does not cause blockage due to precipitated stone powder. In addition to this, an appropriate filter or the like can be inserted in the communication section. Alternatively, an opening or opening / closing means for dropping the stone powder into the water storage tank 107 may be provided near the communication portion.

Further, since water is circulated by the action of the exhaust fan 200 on the upper side, a pumping means such as a pump is required to simplify the structure of the apparatus. However, if there is little demand for simplification, such pumping is required. Means may be provided.
Further, in relation to the exhaust fan 200, the exhaust system may be opened into the working chamber as long as sufficient cleaning of air can be achieved by the device of the present invention, and a duct or the like is provided in the exhaust fan 200 as necessary, Exhaust to the outside of the work chamber may be performed. In addition, although stone powder having a larger specific gravity than water is targeted for removal on the upper side, fibers such as plastic powder and glass may be removed. If such an object to be removed has a specific gravity smaller than that of water, the apparatus can be appropriately deformed. For example, instead of providing the opening 109 on the bottom surface of the water channel 105 in the main body, it is possible to cause water to overflow from the upper surface of the water channel 105.
Instead of 11, a downwardly extending tube can be arranged to suck up dust-free water.

[0013]

As described above, according to the present invention,
An overhanging part is provided that extends from the lower part of the chamber-like main body that is exhausted to the work surface side, and the upper part of the overhanging part is opened to accept the dust that falls, and the main body of the dust is the water flow and air flow. Introduced into the inside of the machine to cause water droplets and film formation, and effectively collect dust in water, and then separate it from the air flow and store it in the main body. The dust generated in the process can be effectively introduced into and retained in the main body of the apparatus, whereby the air can be cleaned and a good working environment can be realized.

[0014]

[Brief description of drawings]

FIG. 1 is a schematic side sectional view showing an embodiment of the dust removing device of the present invention.

[Explanation of symbols]

 100 Device Main Body 101 Bent Section 103 Eliminator 105 Water Channel 107 Water Storage Tank 109, 111 Opening 200 Exhaust Fan 300 Overhanging Section 301 Opening 303 Water Channel 305 Water Flow Board 307 Gallery Section

Claims (3)

[Claims] 1. A chamber-shaped main body, an exhaust means for exhausting the main body, an overhanging portion projecting from a lower portion of the main body to a work surface side, and an opening provided in the overhanging portion and opened upward. Department,
A trough-shaped member provided along the edge of the opening for supplying water to the inside of the opening, a water flow plate provided inside the opening, and flowing along the water flow plate An introducing member for introducing water and air sucked from the opening in association with the operation of the exhaust means into the main body, the introducing member having a narrowed portion at the introducing portion, and the introducing member being continuous with the introducing member. Then, provided in the main body, an arc-shaped member having a curved surface having an arc-shaped cross section, and a separation member provided downstream of the separation member in the exhaust direction and for separating water containing dust and air, And a means for holding the separated water, which is provided below the separating member. 2. The water means provided along the inner wall of the main body at a position for receiving the water containing the dust falling from the separating member, and the bottom of the main body below the water passage member. The dust removing device according to claim 1, further comprising a water storage part, and the water channel part and the gutter-shaped member are communicated with each other. 3. The dust removing device according to claim 2, wherein water having a lower dust content concentration than the water storage portion is taken in at a connecting portion between the introducing member and the arc-shaped member.