JP2019063744A - Dust collecting device - Google Patents

Abstract

To provide a dust filter which hardly receives a liquid pressure by a liquid before filtration when replacing a dirty filter medium with a new filter medium, and which can supply a liquid before filtration evenly with respect to the filter medium, and to provide a dust collecting device using the same.SOLUTION: A dust filter for removing dust from a liquid including dust includes: a first portion in which a clean filter medium is stored; a second portion for discharging a dirty filter medium; a filter medium stretched between the first portion and the second portion; a drive part for moving the filter medium; and a liquid supply part for supplying a liquid including dust to the filter medium stretched between the first portion and the second portion. When the filter medium becomes dirty, a clean filter medium is supplied from the first portion by the drive part, and the dirty filter medium can be discharged to the second portion. The liquid supply part diffuses the liquid including dust with respect to the filter medium. A dust collecting device includes the dust filter.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dust filter and a dust collector.

As a dust collector, what is shown to patent document 1 is known, for example. This dust collecting apparatus has a duct of a predetermined shape, a primary water storage tank, a secondary water storage tank, and a blower. The gas containing dust sucked from the duct moves in the order of the primary water storage tank and the secondary water storage tank and is discharged. Among the dust contained in the gas, a component having a relatively high specific gravity is collected in the water stored in the primary water storage tank. Components with relatively low specific gravity are collected in the water stored in the secondary water reservoir.

As a filter, what is shown to patent document 2 or patent document 3 is known, for example. The filters of Patent Document 2 and Patent Document 3 both have a first part for winding the uncleaned filter medium, a second part for winding the uncleaned filter medium, a tank for holding the liquid before filtration, and a tank And a pump for suctioning the pre-filtered liquid stored in the The filter media is disposed at the bottom portion of the tank and, if clogging occurs, the filter media is wound onto the second portion to supply fresh filter media to the bottom portion of the tank.

Utility model registration 3171096 gazette Japanese Utility Model Publication 7-28895 Japanese Patent Application Laid-Open No. 60-172320

In the dust collecting apparatus as described in Patent Document 1, the dust having a large specific gravity sinks to the bottom of the water and does not pollute the water so much. However, the gas drawn from the duct includes dust having a relatively low specific gravity. Such dust is easily diffused in water due to disturbance of the water surface or the like, and it pollutes the water remarkably and becomes turbid. Then, when the turbid water adheres to the inner wall of the dust collector and is dried, the dust may be pulverized again and discharged to the outside of the dust collector, which may contaminate the environment. In order to prevent such a situation, it is necessary to frequently change the water in the water storage tank, which is troublesome.

In the filters such as Patent Document 2 and Patent Document 3, since the filter medium is immersed in the liquid before filtration, the filter medium is constantly subjected to the fluid pressure by the liquid before filtration. It takes a relatively large force to wind the filter medium on the second part while the filter medium is under hydraulic pressure, and the filter medium may be damaged during winding and may be damaged. When the filter medium is broken, the dust contained in the liquid before filtration mixes with the filtrate to reduce the filtration efficiency. In addition, dust is likely to accumulate immediately below the inlet for supplying the liquid before filtration to the tank. As described above, if unevenness occurs when the liquid before filtration is supplied to the filter medium, there is a problem that a part of the filter medium that does not contribute to the filtration is generated and the efficiency of the filtration is deteriorated.

The present invention uses a dust filter that is less susceptible to hydraulic pressure by the liquid before filtration when replacing a soiled filter medium with a new filter medium, and that can uniformly supply the liquid before filtration to the filter medium, and that It is an object of the present invention to provide a dust collector.

A dust filter for removing dust from a liquid containing dust, the dust filter comprising: a first portion for storing unfiltered filter medium; and a second portion for discharging the soiled filter medium; The filter medium extended between the first part and the second part, the drive unit for moving the filter medium, and the filter medium extended between the first part and the second part are supplied with a liquid containing dust And, when the filter medium is soiled, the drive section supplies unfiltered filter medium from the first portion, and the soiled filter medium can be discharged to the second portion, The liquid supply part solves the above-mentioned problem by the dust filter which is a thing which emits the liquid containing dust to a filter medium.

A dust collector including a dust collector and a dust filter, wherein the dust filter includes a first portion for storing unfiltered filter media, a second portion for discharging the dirty filter media, and a first portion A liquid supply unit for supplying a liquid containing dust to a filter medium spread between the second part, a drive unit for moving the filter medium, and a filter medium spread between the first part and the second part And, when the filter medium is soiled, the drive section supplies unfiltered filter medium from the first part, and the soiled filter medium can be discharged to the second part, and the liquid supply part is The above problem is solved by a dust collecting apparatus which dissipates a liquid containing dust to a filter medium.

In the dust filter and the dust collector described above, the filter medium is not immersed in the liquid before filtration, that is, the liquid containing dust, and instead of filtering, the liquid mainly containing the dust is dissipated with respect to the filter medium. While filtering, the filter medium does not receive much hydraulic pressure. Therefore, it is possible to smoothly supply the filter medium from the first portion to the second portion. Moreover, in order to dissipate the liquid containing dust to the filter medium, it is possible to supply the liquid before filtration evenly to the filter medium and perform the filtration efficiently.

The dust filter and the dust collector further include a storage tank for storing the liquid after filtration, and the pump suctions the filtered liquid stored in the storage tank so that the pump can It is preferable to supply the liquid after filtration. Further, in the above-described dust collector, the dust collector includes a collection tank for storing the liquid that collects the dust, and the dust filter includes a storage tank for storing the liquid after filtration. The pump can suction the filtered liquid stored in the storage tank, and the filtered liquid can be supplied to the pump by supplying the filtered liquid to the collection tank of the dust collector. Is preferred. In the above configuration, since the liquid after filtration is supplied to the pump, it is possible to prevent the failure of the pump due to the inclusion of dust in the pump.

The dust filter and the dust collector further include a sensor for detecting that the filter medium is clogged, and it is preferable that the presence or absence of the drive of the drive unit be controlled based on a signal from the sensor. By switching the presence or absence of the drive of the drive part by the sensor, it becomes possible to automatically supply the dirty filter medium to the second part.

In the above-mentioned dust collector, the pump is connected to the storage tank of the dust filter and the collection tank of the dust collector, and the collection tank of the dust collector and the liquid supply unit of the dust filter communicate with each other. By operating it, the filtered liquid stored in the storage tank is returned to the collection tank of the dust collector, and the liquid containing dust in the collection tank is pushed out to the liquid supply portion, and the collection tank and dust filter of the dust collector It is preferable to be configured to filter dust contained in the liquid stored in the collection tank while circulating the liquid between the storage tanks. With this configuration, the filtered liquid can be sucked from the storage tank with a minimum number of pumps, and the dust-containing liquid can be pushed out from the collection tank to the liquid supply unit. Since the number of pumps can be minimized, the apparatus can be miniaturized.

In the above-described dust collector, the dust collector includes a collection tank for storing a liquid for collecting dust, and the dust filter includes a storage tank for storing a liquid after filtration, It is preferable to filter dust contained in the liquid stored in the repair tank while circulating the liquid between the collection tank of the dust collector and the storage tank of the dust filter. According to this configuration, it is possible to keep the liquid in the collection tank of the dust collector clean without stopping the operation of the dust collector. This makes it possible to extend the operation time of the dust collector without frequently replacing the liquid in the repair tank.

According to the present invention, it is difficult to receive hydraulic pressure when winding up a dirty filter medium, and a dust filter that can uniformly supply the liquid before filtration to the filter medium and a dust collector using the same are provided. It will be possible to

It is a figure which shows one Embodiment of a dust collector containing a dust filter and a dust collector. It is a perspective view which shows the structure of the periphery of the liquid supply part of a dust filter.

Hereinafter, an embodiment of a dust filter (hereinafter simply referred to as a filter) and an embodiment of a dust collector including a dust collector and a filter will be described with reference to the drawings. The dust filter and the dust collector listed below are merely examples.

As shown in FIG. 1, the dust collector 1 includes a dust collector 5 and a filter 2. First, the filter 2 will be described, and then the dust collector 5 will be described.

[Filtration machine]
As shown in FIG. 1, the filter 2 is for removing dust from the dust-containing liquid 71, that is, the liquid before filtration. Examples of the liquid before filtration include volatile particles called fumes produced by laser processing, plasma processing, arc welding and the like, and liquids containing fine particles produced by cutting of metals, wood, plastics and the like. Such a liquid is discharged from, for example, a dust collector 5 that collects fumes and dust including fine particles using a liquid described later.

The filter 2 shown in FIG. 1 has a first portion for storing the uncleaned filter medium, a second portion for discharging the dirty filter medium, and a filter medium extended between the first and second portions. And 72, a drive unit 21 for moving the filter medium, and a liquid supply unit 22 for supplying a liquid containing dust to the filter medium 72 spread between the first portion and the second portion. When the filter medium 72 becomes dirty, the drive part 21 supplies the non-stained filter medium from the first portion so that the dirty filter medium can be discharged to the second portion. The liquid supply unit 22 has a configuration for dissipating the liquid 71 containing dust to the filter medium.

As the filter medium, an appropriate one may be used in accordance with the particle size of the dust. As the filter medium, it is preferable to use a sheet-like one, and for example, a sheet-like filter paper may be used.

The first part may be any one that can store the uncleaned filter medium 72. In the filter 2 of FIG. 1, the first portion is configured of a first roller 23 capable of winding and storing the filter medium 72. The first roller 23 is rotatably supported at its both ends by the inner wall of a first storage chamber 24 described later.

In the filter 2 of FIG. 1, the first roller 23 is stored in the first storage chamber 24. The first storage room 24 is configured to be openable and closable by a door 25. By opening and closing the door 25 and winding a new filter medium around the first roller 23, it is possible to replenish the filter medium.

The first storage chamber 24 is provided with a partition wall having a slit 26. The partition wall separates the first storage chamber 24 from the filtration chamber 27 described later. The filter material 72 wound around the first roller 23 is supplied through the slit 26 to the filtration chamber 27 described later.

The second part may be anything that can discharge the dirty filter media 72. In the filter 2 of FIG. 1, the second part is configured of a second storage chamber 28 in which the filter material 72 can be stored. Instead of this configuration, for example, a second roller (not shown) may be provided to wind up the soiled filter paper in the second storage chamber 28. The second roller may be rotatably supported at its both ends on the inner wall of the second storage chamber 28 and rotated by a drive source such as an electric motor. In this case, the electric motor functions as a drive unit for moving the filter medium.

The second storage chamber 28 is provided with a partition wall having a slit 29. The partition wall separates the second storage chamber 28 from the filtration chamber 27 described later. The filter medium 72 soiled by filtration in the filtration chamber 27 is supplied to the second storage chamber 28 through the slit 29. The soiled filter material 72 supplied from the filtration chamber 27 is placed at the bottom of the second storage chamber 28 and accumulated one by one. The second storage chamber 28 is configured to be openable and closable by the door 30. By opening and closing the door 30, the soiled filter medium 72 accumulated at the bottom of the second storage chamber 28 can be discharged from the filter 2.

A filtration chamber 27 is provided between the first storage chamber 24 and the second storage chamber 28. The filtration chamber 27 communicates with the first storage chamber 24 and the second storage chamber 28 through the slits 26 and 29 described above. In the filtration chamber 27, a third roller 31 and a fourth roller 32 are disposed. By winding the filter medium 72 around the third roller 31 and the fourth roller 32, the direction in which the filter medium 72 extends is changed. By this, the filter medium 72 is spread between the first part and the second part. Both ends of each of the third roller 31 and the fourth roller 32 are rotatably supported by the wall surface of the filtration chamber 27. The configuration of the roller for changing the direction in which the filter medium 72 extends is not particularly limited.

Above the third roller 31 of the filtration chamber 27, a liquid supply unit 22 for supplying the liquid 71 containing dust to the filter medium 72 spread between the first portion and the second portion is disposed. As shown in FIG. 2, in the filter 2 of the present embodiment, the liquid supply portion 22 is configured of a hollow pipe having a plurality of through holes 221. As shown by the arrows in FIG. 2, when the liquid before filtration is supplied to the inside of the liquid supply unit 22, the liquid before filtration is spouted from the plurality of through holes 221 and the filter medium 72 wound around the three rollers 31. The liquid prior to filtration is supplied.

In the filter 2 of the present embodiment, the liquid supply unit 22 is configured by providing a plurality of through holes in a hollow crucible, but other configurations are possible as long as the filter medium can dissipate the liquid before filtration. May be adopted. For example, a configuration using a nozzle for diffusion may be mentioned.

The outer diameter of the third roller 31 is configured to be relatively larger than the outer diameter of the fourth roller 32. By increasing the outer diameter of the third roller 31, the area where the liquid before filtration is dissipated with respect to the filter medium 72 is increased. By this, the filter medium 72 is prevented from clogging in a short time. The bottom surface 271 of the filtration chamber 27 is provided with a plurality of through holes, and the filtration chamber 27 and the storage tank 33 described later communicate with each other through the plurality of through holes. By this, the liquid before filtration is pulled down without accumulating in a large amount on the filter medium 72. The bottom of the filtration chamber 27 can be formed, for example, by using punching metal.

The shape of the bottom surface 271 of the filtration chamber 27 is an arc like the third roller 31, and a gap is formed between the bottom surface 271 and the third roller 31. For example, when the filter medium 72 is clogged, the liquid before filtering is accumulated on the filter medium, and the weight of the liquid before filtration causes the filter medium 72 to bend downward. At this time, it is possible to prevent the filter medium 72 from being broken by the weight of the liquid before filtration, by supporting the filter medium 72 in which the arc-shaped bottom surface 271 is bent.

A sensor 34 is disposed in the filtration chamber 27 to detect that the filter medium is clogged. Further, the drive unit 21 is disposed under the slit 29 of the second storage chamber 28. When the sensor 34 detects that the filter medium 72 is clogged, the sensor 34 transmits a signal to a control unit (not shown) (not shown), and the control unit drives the drive unit 21 to contaminate the first portion The filter medium 72 is configured to be supplied to the filtration chamber 27 and the dirty filter medium can be discharged to the second portion.

As a sensor, a sensor which detects the pressure at the time of suction of pump 35 mentioned below may be used, and a floating sensor which detects the liquid level of the fluid before filtration may be used. In the filter 2 of the present embodiment, a floating sensor that detects the liquid level of the liquid before filtration is used as a sensor. Since the floating sensor can detect the liquid level and discharge the soiled filter medium 72, the liquid level of the liquid before filtration rises excessively and overflows from the filter 2, or the drive unit 21 becomes liquid It is possible to directly prevent the situation of immersion.

The position where the floating sensor 34 is provided is preferably provided on the upper side of the filter medium 72, and arranged so as to detect that the liquid level has reached the upper limit below the position where components of the electrical system such as the drive unit 21 are provided. Is preferred. Further, it is preferable to arrange the position where the floating sensor 34 is provided so as to detect that the excess hydraulic pressure reaches the upper limit at a level at which it does not apply to the filter medium 72 when discharging the dirty filter medium 72. .

The above-mentioned drive part 21 can be comprised from the 5th roller 211 and the 6th roller 212, for example, as shown in FIG. The fifth roller 211 and the sixth roller 212 are disposed with a gap that allows the filter medium 72 to pass through, and are arranged inside (the direction indicated by the arrow in FIG. 1) the fifth roller 211 and the sixth roller 212 Rotate. Thus, the soiled filter medium 72 can be wound up and stored in the second storage chamber 28. The fifth roller 211 and / or the sixth roller 212 may be driven by an electric motor or the like.

The configuration of the drive unit is not particularly limited, as long as the dirty filter medium can be discharged to the second portion and the unclean filter medium can be supplied to the liquid supply unit. Therefore, instead of the configuration of the drive unit 21 including the fifth roller 211 and the sixth roller 212 as described above, for example, as described above, the second roller for winding up the soiled filter paper may be disposed. Good. In addition, the drive unit may rotate the roller, for example, by rotating the handle to wind up the soiled filter medium.

In the filter 2 of the present embodiment, a storage tank 33 for storing the liquid after filtration is provided below the above-mentioned filtration chamber 27. The storage tank should just be the structure which can store the liquid after filtration. As described above, the storage tank 33 communicates with the filtration chamber 27 and has a structure in which the liquid filtered by the filter medium 72 is accumulated. The storage tank 33 is in a positional relationship adjacent to the second storage chamber 28 described above. The storage tank 33 and the second storage chamber 28 are separated by a partition wall. The second storage chamber 28, the storage tank 33, the filtration chamber 27, and the first storage chamber 24 are disposed from the bottom to the top in the order described, and are housed in a substantially prismatic housing. For this reason, the filter 2 of this embodiment is compact and space saving.

The storage tank 33 of the filter 2 of the present embodiment is shaped so that the volume of the lower part is smaller than that of the upper part. Specifically, the storage tank 33 has a wide portion at the upper side, a narrow portion at the lower side, and the wide portion and the narrow portion communicate with each other. With such a shape, the liquid level is high when the amount of liquid stored in the storage tank is small. When the liquid amount is small, air is difficult to bite in the pump when the liquid is sucked by the pump. By making the upper part wide, the volume of the storage tank 33 is increased.

A pump 35 for suctioning the liquid stored in the storage tank 33 is connected to the bottom portion of the storage tank 33 of the filter of the present embodiment. Since the liquid after filtration is supplied to the pump 35, it is possible to prevent the wear and damage of the pump 35 caused by the contamination of the pump 35 with dust.

In the filter 2 of the present embodiment, the liquid before filtration is dissipated evenly from the liquid supply section 22 to the filter medium 72. For this reason, it is prevented that the refuse contained in the liquid before filtration concentrates on the arbitrary locations of the filter medium 72. That is, since the supply of the liquid before filtration to the filter medium is unlikely to be uneven, it is possible to prevent a part of the filter medium 72 that does not contribute to the filtration from being generated.

When filtration is performed by laying the filter medium on the bottom of the tank storing the liquid before filtration, there is a problem that a large hydraulic pressure is applied to the filter medium. When the filter medium is clogged, the liquid level further rises and the pressure of the liquid acting on the filter medium further rises. If it is attempted to wind up the soiled filter medium in such a state and supply the unpolished filter medium, there is a problem that the filter medium may be damaged by the hydraulic pressure. In the filter 2 of the present embodiment, the diffusion of the liquid before filtration to the filter medium is performed in the air. And filtration is not performed in the state which immersed the filter medium in the liquid before filtration, but it disperses the liquid before filtration with respect to a filter medium. For this reason, a large hydraulic pressure does not act on the filter medium. Since a large hydraulic pressure is prevented from acting on the filter medium when the dirty filter medium is discharged to the second part, the supply of the non-dirty filter medium to the filtration chamber 27 and the stain to the second part Filter paper can be discharged smoothly.

The upper limit position of the liquid level detected by the floating sensor should be set close to the filter medium so that the floating sensor does not interfere with the filter medium so that the liquid level does not rise too much when the filter medium 72 is clogged. Is preferred. In this way, the dirty filter medium is discharged to the second storage chamber 28 before the liquid level rises excessively, so that it is possible to prevent the liquid level from rising excessively.

[Dust collector]
Next, a dust collector 1 including the above-described filter 2 and the dust collector 5 shown in FIG. 1 will be described.

The dust collector 5 shown in FIG. 1 is provided below the duct 51 and a duct 51 for sucking a gas containing dust, and stores a liquid for collecting dust contained in the gas sucked from the duct 51. The first collection tank 52, a second collection tank 53 for storing a liquid that collects liquid contained in the gas that has passed through the first collection tank 52, and the gas inside the dust collector 5 are suctioned and suctioned. And a blower 54 for discharging the exhausted gas to the outside.

In the first collection tank 52, among the dust sucked from the duct 51, dust having a large specific gravity is collected. Dust having a large specific gravity is repelled by contacting the inner wall of the duct 51 or the like, and is settled and collected in the liquid stored in the first collection tank 52. The liquid stored in the collection tank may be selected according to the specific gravity of the dust. For example, it is possible to use water as the liquid.

The first collection tank 52 and the second collection tank 53 are separated by the first partition 55, and the liquid stored in the first collection tank 52 and the liquid stored in the second collection tank 53 And it is kept from mixing.

A second partition 56 is disposed above the first partition 55. A gap 57 is provided between the first partition 55 and the second partition 56. In the gap 57, a plurality of angles 591 are disposed. The gas from which dust having a large specific gravity has been removed in the first collection tank 52 travels between the plurality of angles 591 disposed in the gap 57 to the upper part of the second collection tank 53.

An arc-shaped portion 58 and a third partition wall 59, a plurality of angles 60, and a plurality of baffles 61 are provided in the order described from the bottom to the top in the upper part of the second collection tank 53. A gap 581 is provided between the baffle plate 61 located at the lowermost position and the upper end of the arc-shaped portion 58, and a plurality of angles 60 are provided in the gap 581. The lower end portion of the arc-shaped portion 58 is in a state of being immersed in the liquid stored in the second collection tank 53.

When the gas from which dust having a large specific gravity is removed enters the arc-shaped portion 58, the gas and the liquid are vigorously stirred in the arc-shaped portion 58 to generate mist. The gas from which dust having a large specific gravity is removed in the first collection tank 52 still includes dust having a small specific gravity. When the gas and the liquid are vigorously stirred in the arc-shaped portion 58, a part of the dust having a small specific gravity contained in the gas is directly collected by the liquid stored in the second collection tank 53. Furthermore, a part of the dust having a small specific gravity also adheres to the mist of the liquid generated in the arc-shaped portion 58. When the small dust adheres to the mist, it moves above the arc-shaped portion 58 and contacts the plurality of angles 60 and the plurality of baffles 61, the mist gathers and changes into water droplets. The plurality of water droplets move to the top of the third partition 59 while collecting, drop from the through hole provided in the third partition 59, and merge with the liquid stored in the second collection tank 53. Dust having a small specific gravity is collected by the liquid contained in the second collection tank 53 as described above.

As described above, the gas from which the dust having a large specific gravity and the dust having a small specific gravity are removed is discharged to the outside of the dust collector 5 through the blower 54. The space above the second collection tank 53 is separated from the space of the first collection tank 52 by the partition wall 62. For this reason, the gas containing dust does not mix in clean gas.

As described above, in the first collection tank 52, dust having a large specific gravity is mainly collected. The dust with a high specific gravity is in the state of settling to the liquid, so the liquid is not so dirty. On the other hand, in the second collection tank 53, dust having a small specific gravity is mainly collected. Dust with a low specific gravity is difficult to settle. In addition to this, the liquid level of the second collection tank 53 is constantly stirred by the gas drawn by the blower 54. For this reason, the liquid stored in the second collection tank 53 becomes dirty in a relatively early time as compared with the first collection tank 52.

When the concentration of the small specific gravity dust contained in the second collection tank 53 becomes high, the following problems occur. The liquid surface of the second collection tank 53 is constantly stirred by the gas drawn by the blower 54, and water droplets and mist are generated. Some of the water droplets and mist adhere to the inner wall of the dust collector 5 and are dried. When the water droplets and mist dry, the small specific gravity dust contained in them is pulverized again. Then, a part of the powdered dust leaks out of the dust collector 5 from the blower 54. In order to prevent such a problem, the liquid in the second collection tank 53 has to be replaced frequently. In addition to the complicated liquid replacement work of the repair tank 53, there is a problem that the operation of the dust collector can not but be stopped during the liquid replacement work.

In the dust collection device 1 of the present embodiment, as shown in FIG. 1, a pipe extending from the above-described pump 35 is connected to the second collection tank 53 of the dust collector 5. The second collection tank 53 of the dust collector 5 and the liquid supply unit of the filter 2 are in communication by means of piping. That is, the storage tank 33 of the filter 2 and the second collection tank 53 of the dust collector 5 form a circulation path.

When the pump 35 is operated, the filtered liquid stored in the storage tank 33 of the filter 2 is sucked by the pump 35 and returns to the second collection tank 53 of the dust collector 5. When the filtered liquid is returned to the second collection tank 53 of the dust collector 5, the liquid is pushed out to the liquid supply unit 22 in accordance with the amount of the returned liquid. Thus, when the pump 35 is operated, the liquid is contained in the liquid stored in the second collection tank 53 while being circulated between the second collection tank 53 of the dust collector 5 and the storage tank 33 of the filter 2. Dust is filtered.

In the dust collection device 1 described above, the liquid contained in the liquid collected in the second collection tank 53 is filtered while the liquid circulates between the filter 2 and the dust collector 5. For this reason, the liquid stored in the second collection tank 53 of the dust collector 5 is always filtered, and the clean state is maintained. Therefore, even if the liquid stored in the collection tank is not replaced, it is possible to prevent dust from leaking out of the dust collection device 1. In addition, since the frequency of replacing the liquid stored in the repair tank can be reduced, the operation time of the dust collection apparatus can be extended.

When the operation of the dust collection device 1 is continued, the filter 2 is operated to continue the filtration. In the filter 2, the filter medium 72 is clogged while the filtration is continued. When the filter medium 72 is clogged, the sensor 34 detects an increase in the liquid level in the filtration chamber 27. Then, the drive unit 21 operates to wind up the soiled filter medium and discharge it to the second storage chamber 28 and the soiled filter medium 72 is supplied from the first storage chamber 24 to the filtration chamber 27. Ru. The replacement of the soiled filter medium 72 can be carried out without stopping the operation of the dust collector 5 and the filter 2. Therefore, the operation time of the dust collection device 1 can be extended.

In the dust collection device 1 of the present embodiment, if there is at least one pump, the second collection tank while the liquid circulates between the second collection tank 53 of the dust collector 5 and the storage tank 33 of the filter 2. Dust contained in the liquid stored in 53 can be filtered. Therefore, if the configuration as described above is adopted, it is possible to make the dust collection device 1 compact and save space. The control of the pump is also sufficient for one pump, so the design can be simplified. This makes it possible to reduce the frequency of failures and simplify maintenance. It also makes it possible to reduce the consumption of power.

The dust collection device 1 described above includes a first collection tank 52 and a second collection tank 53. As a single collection tank of the dust collector, a pump may be connected to the collection tank to connect the collection tank and the liquid supply unit of the filter.

71 liquid containing dust 2 dust filter 72 filter medium 21 drive unit 22 liquid supply unit 33 storage tank 35 pump 5 dust collector 34 sensor 1 dust collector

The present invention relates to a dust collector.

As a dust collector, what is shown to patent document 1 is known, for example. This dust collecting apparatus has a duct of a predetermined shape, a primary water storage tank, a secondary water storage tank, and a blower. The gas containing dust sucked from the duct moves in the order of the primary water storage tank and the secondary water storage tank and is discharged. Among the dust contained in the gas, a component having a relatively high specific gravity is collected in the water stored in the primary water storage tank. Components with relatively low specific gravity are collected in the water stored in the secondary water reservoir.

As a filter, what is shown to patent document 2 or patent document 3 is known, for example. The filters of Patent Document 2 and Patent Document 3 both have a first part for winding the uncleaned filter medium, a second part for winding the uncleaned filter medium, a tank for holding the liquid before filtration, and a tank And a pump for suctioning the pre-filtered liquid stored in the The filter media is disposed at the bottom portion of the tank and, if clogging occurs, the filter media is wound onto the second portion to supply fresh filter media to the bottom portion of the tank.

Utility model registration 3171096 gazette Japanese Utility Model Publication 7-28895 Japanese Patent Application Laid-Open No. 60-172320

In the dust collecting apparatus as described in Patent Document 1, the dust having a large specific gravity sinks to the bottom of the water and does not pollute the water so much. However, the gas drawn from the duct includes dust having a relatively low specific gravity. Such dust is easily diffused in water due to disturbance of the water surface or the like, and it pollutes the water remarkably and becomes turbid. Then, when the turbid water adheres to the inner wall of the dust collector and is dried, the dust may be pulverized again and discharged to the outside of the dust collector, which may contaminate the environment. In order to prevent such a situation, it is necessary to frequently change the water in the water storage tank, which is troublesome.

In the filters such as Patent Document 2 and Patent Document 3, since the filter medium is immersed in the liquid before filtration, the filter medium is constantly subjected to the fluid pressure by the liquid before filtration. It takes a relatively large force to wind the filter medium on the second part while the filter medium is under hydraulic pressure, and the filter medium may be damaged during winding and may be damaged. When the filter medium is broken, the dust contained in the liquid before filtration mixes with the filtrate to reduce the filtration efficiency. In addition, dust is likely to accumulate immediately below the inlet for supplying the liquid before filtration to the tank. As described above, if unevenness occurs when the liquid before filtration is supplied to the filter medium, there is a problem that a part of the filter medium that does not contribute to the filtration is generated and the efficiency of the filtration is deteriorated.

The present invention uses a dust filter that is less susceptible to hydraulic pressure by the liquid before filtration when replacing a soiled filter medium with a new filter medium, and that can uniformly supply the liquid before filtration to the filter medium, and that It is an object of the present invention to provide a dust collector.

A dust filter for removing dust from a liquid containing dust, the dust filter comprising: a first portion for storing unfiltered filter medium; and a second portion for discharging the soiled filter medium; The filter medium extended between the first part and the second part, the drive unit for moving the filter medium, and the filter medium extended between the first part and the second part are supplied with a liquid containing dust And, when the filter medium is soiled, the drive section supplies unfiltered filter medium from the first portion, and the soiled filter medium can be discharged to the second portion, The liquid supply part solves the above-mentioned problem by the dust filter which is a thing which emits the liquid containing dust to a filter medium.

A dust collector including a dust collector and a dust filter, wherein the dust filter includes a first portion for storing unfiltered filter media, a second portion for discharging the dirty filter media, and a first portion A liquid supply unit for supplying a liquid containing dust to a filter medium spread between the second part, a drive unit for moving the filter medium, and a filter medium spread between the first part and the second part And, when the filter medium is soiled, the drive section supplies unfiltered filter medium from the first part, and the soiled filter medium can be discharged to the second part, and the liquid supply part is The above problem is solved by a dust collecting apparatus which dissipates a liquid containing dust to a filter medium.

In the dust filter and the dust collector described above, the filter medium is not immersed in the liquid before filtration, that is, the liquid containing dust, and instead of filtering, the liquid mainly containing the dust is dissipated with respect to the filter medium. While filtering, the filter medium does not receive much hydraulic pressure. Therefore, it is possible to smoothly supply the filter medium from the first portion to the second portion. Moreover, in order to dissipate the liquid containing dust to the filter medium, it is possible to supply the liquid before filtration evenly to the filter medium and perform the filtration efficiently.

The dust filter and the dust collector further include a storage tank for storing the liquid after filtration, and the pump suctions the filtered liquid stored in the storage tank so that the pump can It is preferable to supply the liquid after filtration. Further, in the above-described dust collector, the dust collector includes a collection tank for storing the liquid that collects the dust, and the dust filter includes a storage tank for storing the liquid after filtration. The pump can suction the filtered liquid stored in the storage tank, and the filtered liquid can be supplied to the pump by supplying the filtered liquid to the collection tank of the dust collector. Is preferred. In the above configuration, since the liquid after filtration is supplied to the pump, it is possible to prevent the failure of the pump due to the inclusion of dust in the pump.

The dust filter and the dust collector further include a sensor for detecting that the filter medium is clogged, and it is preferable that the presence or absence of the drive of the drive unit be controlled based on a signal from the sensor. By switching the presence or absence of the drive of the drive part by the sensor, it becomes possible to automatically supply the dirty filter medium to the second part.

In the above-mentioned dust collector, the pump is connected to the storage tank of the dust filter and the collection tank of the dust collector, and the collection tank of the dust collector and the liquid supply unit of the dust filter communicate with each other. By operating it, the filtered liquid stored in the storage tank is returned to the collection tank of the dust collector, and the liquid containing dust in the collection tank is pushed out to the liquid supply portion, and the collection tank and dust filter of the dust collector It is preferable to be configured to filter dust contained in the liquid stored in the collection tank while circulating the liquid between the storage tanks. With this configuration, the filtered liquid can be sucked from the storage tank with a minimum number of pumps, and the dust-containing liquid can be pushed out from the collection tank to the liquid supply unit. Since the number of pumps can be minimized, the apparatus can be miniaturized.

In the above-described dust collector, the dust collector includes a collection tank for storing a liquid for collecting dust, and the dust filter includes a storage tank for storing a liquid after filtration, it is preferable to filter the dust contained in the liquid stored in the collecting tank while circulating the liquid between the reservoir of the collecting tank and the dust filter machine of the dust collector. According to this configuration, it is possible to keep the liquid in the collection tank of the dust collector clean without stopping the operation of the dust collector. This makes it possible to extend the operation time of the dust collector without frequently changing the liquid in the collection tank.

According to the present invention, it is difficult to receive hydraulic pressure when winding up a dirty filter medium, and a dust filter that can uniformly supply the liquid before filtration to the filter medium and a dust collector using the same are provided. It will be possible to

It is a figure which shows one Embodiment of a dust collector containing a dust filter and a dust collector. It is a perspective view which shows the structure of the periphery of the liquid supply part of a dust filter.

Hereinafter, an embodiment of a dust filter (hereinafter simply referred to as a filter) and an embodiment of a dust collector including a dust collector and a filter will be described with reference to the drawings. The dust filter and the dust collector listed below are merely examples.

As shown in FIG. 1, the dust collector 1 includes a dust collector 5 and a filter 2. First, the filter 2 will be described, and then the dust collector 5 will be described.

[Filtration machine]
As shown in FIG. 1, the filter 2 is for removing dust from the dust-containing liquid 71, that is, the liquid before filtration. Examples of the liquid before filtration include volatile particles called fumes produced by laser processing, plasma processing, arc welding and the like, and liquids containing fine particles produced by cutting of metals, wood, plastics and the like. Such a liquid is discharged from, for example, a dust collector 5 that collects fumes and dust including fine particles using a liquid described later.

The filter 2 shown in FIG. 1 has a first portion for storing the uncleaned filter medium, a second portion for discharging the dirty filter medium, and a filter medium extended between the first and second portions. And 72, a drive unit 21 for moving the filter medium, and a liquid supply unit 22 for supplying a liquid containing dust to the filter medium 72 spread between the first portion and the second portion. When the filter medium 72 becomes dirty, the drive part 21 supplies the non-stained filter medium from the first portion so that the dirty filter medium can be discharged to the second portion. The liquid supply unit 22 has a configuration for dissipating the liquid 71 containing dust to the filter medium.

As the filter medium, an appropriate one may be used in accordance with the particle size of the dust. As the filter medium, it is preferable to use a sheet-like one, and for example, a sheet-like filter paper may be used.

The first part may be any one that can store the uncleaned filter medium 72. In the filter 2 of FIG. 1, the first portion is configured of a first roller 23 capable of winding and storing the filter medium 72. The first roller 23 is rotatably supported at its both ends by the inner wall of a first storage chamber 24 described later.

In the filter 2 of FIG. 1, the first roller 23 is stored in the first storage chamber 24. The first storage room 24 is configured to be openable and closable by a door 25. By opening and closing the door 25 and winding a new filter medium around the first roller 23, it is possible to replenish the filter medium.

The first storage chamber 24 is provided with a partition wall having a slit 26. The partition wall separates the first storage chamber 24 from the filtration chamber 27 described later. The filter material 72 wound around the first roller 23 is supplied through the slit 26 to the filtration chamber 27 described later.

The second part may be anything that can discharge the dirty filter media 72. In the filter 2 of FIG. 1, the second part is configured of a second storage chamber 28 in which the filter material 72 can be stored. Instead of this configuration, for example, a second roller (not shown) may be provided to wind up the soiled filter paper in the second storage chamber 28. The second roller may be rotatably supported at its both ends on the inner wall of the second storage chamber 28 and rotated by a drive source such as an electric motor. In this case, the electric motor functions as a drive unit for moving the filter medium.

The second storage chamber 28 is provided with a partition wall having a slit 29. The partition wall separates the second storage chamber 28 from the filtration chamber 27 described later. The filter medium 72 soiled by filtration in the filtration chamber 27 is supplied to the second storage chamber 28 through the slit 29. The soiled filter material 72 supplied from the filtration chamber 27 is placed at the bottom of the second storage chamber 28 and accumulated one by one. The second storage chamber 28 is configured to be openable and closable by the door 30. By opening and closing the door 30, the soiled filter medium 72 accumulated at the bottom of the second storage chamber 28 can be discharged from the filter 2.

A filtration chamber 27 is provided between the first storage chamber 24 and the second storage chamber 28. The filtration chamber 27 communicates with the first storage chamber 24 and the second storage chamber 28 through the slits 26 and 29 described above. In the filtration chamber 27, a third roller 31 and a fourth roller 32 are disposed. By winding the filter medium 72 around the third roller 31 and the fourth roller 32, the direction in which the filter medium 72 extends is changed. By this, the filter medium 72 is spread between the first part and the second part. Both ends of each of the third roller 31 and the fourth roller 32 are rotatably supported by the wall surface of the filtration chamber 27. The configuration of the roller for changing the direction in which the filter medium 72 extends is not particularly limited.

Above the third roller 31 of the filtration chamber 27, a liquid supply unit 22 for supplying the liquid 71 containing dust to the filter medium 72 spread between the first portion and the second portion is disposed. As shown in FIG. 2, in the filter 2 of the present embodiment, the liquid supply portion 22 is configured of a hollow pipe having a plurality of through holes 221. As indicated by the arrows in FIG. 2, when the liquid before filtration is supplied into the liquid supply unit 22, the liquid before filtration is spouted from the plurality of through holes 221, and the filter medium wound around the third roller 31 The liquid before filtration is supplied to 72.

In the filter 2 of the present embodiment, the liquid supply unit 22 is configured by providing a plurality of through holes in a hollow crucible, but other configurations are possible as long as the filter medium can dissipate the liquid before filtration. May be adopted. For example, a configuration using a nozzle for diffusion may be mentioned.

The outer diameter of the third roller 31 is configured to be relatively larger than the outer diameter of the fourth roller 32. By increasing the outer diameter of the third roller 31, the area where the liquid before filtration is dissipated with respect to the filter medium 72 is increased. By this, the filter medium 72 is prevented from clogging in a short time. The bottom surface 271 of the filtration chamber 27 is provided with a plurality of through holes, and the filtration chamber 27 and the storage tank 33 described later communicate with each other through the plurality of through holes. By this, the liquid before filtration is pulled down without accumulating in a large amount on the filter medium 72. The bottom of the filtration chamber 27 can be formed, for example, by using punching metal.

The shape of the bottom surface 271 of the filtration chamber 27 is an arc like the third roller 31, and a gap is formed between the bottom surface 271 and the third roller 31. For example, when the filter medium 72 is clogged, the liquid before filtering is accumulated on the filter medium, and the weight of the liquid before filtration causes the filter medium 72 to bend downward. At this time, it is possible to prevent the filter medium 72 from being broken by the weight of the liquid before filtration, by supporting the filter medium 72 in which the arc-shaped bottom surface 271 is bent.

A sensor 34 is disposed in the filtration chamber 27 to detect that the filter medium is clogged. Further, the drive unit 21 is disposed under the slit 29 of the second storage chamber 28. When the sensor 34 detects that the filter medium 72 is clogged, the sensor 34 transmits a signal to a control unit (not shown) (not shown), and the control unit drives the drive unit 21 to contaminate the first portion The filter medium 72 is configured to be supplied to the filtration chamber 27 and the dirty filter medium can be discharged to the second portion.

As a sensor, a sensor which detects the pressure at the time of suction of pump 35 mentioned below may be used, and a floating sensor which detects the liquid level of the fluid before filtration may be used. In the filter 2 of the present embodiment, a floating sensor that detects the liquid level of the liquid before filtration is used as a sensor. Since the floating sensor can detect the liquid level and discharge the soiled filter medium 72, the liquid level of the liquid before filtration rises excessively and overflows from the filter 2, or the drive unit 21 becomes liquid It is possible to directly prevent the situation of immersion.

The position where the floating sensor 34 is provided is preferably provided on the upper side of the filter medium 72, and arranged so as to detect that the liquid level has reached the upper limit below the position where components of the electrical system such as the drive unit 21 are provided. Is preferred. Further, it is preferable to arrange the position where the floating sensor 34 is provided so as to detect that the excess hydraulic pressure reaches the upper limit at a level at which it does not apply to the filter medium 72 when discharging the dirty filter medium 72. .

The above-mentioned drive part 21 can be comprised from the 5th roller 211 and the 6th roller 212, for example, as shown in FIG. The fifth roller 211 and the sixth roller 212 are disposed with a gap that allows the filter medium 72 to pass through, and are arranged inside (the direction indicated by the arrow in FIG. 1) the fifth roller 211 and the sixth roller 212 Rotate. Thus, the soiled filter medium 72 can be wound up and stored in the second storage chamber 28. The fifth roller 211 and / or the sixth roller 212 may be driven by an electric motor or the like.

The configuration of the drive unit is not particularly limited, as long as the dirty filter medium can be discharged to the second portion and the unclean filter medium can be supplied to the liquid supply unit. Therefore, instead of the configuration of the drive unit 21 including the fifth roller 211 and the sixth roller 212 as described above, for example, as described above, the second roller for winding up the soiled filter paper may be disposed. Good. In addition, the drive unit may rotate the roller, for example, by rotating the handle to wind up the soiled filter medium.

In the filter 2 of the present embodiment, a storage tank 33 for storing the liquid after filtration is provided below the above-mentioned filtration chamber 27. The storage tank should just be the structure which can store the liquid after filtration. As described above, the storage tank 33 communicates with the filtration chamber 27 and has a structure in which the liquid filtered by the filter medium 72 is accumulated. The storage tank 33 is in a positional relationship adjacent to the second storage chamber 28 described above. The storage tank 33 and the second storage chamber 28 are separated by a partition wall. The second storage chamber 28, the storage tank 33, the filtration chamber 27, and the first storage chamber 24 are disposed from the bottom to the top in the order described, and are housed in a substantially prismatic housing. For this reason, the filter 2 of this embodiment is compact and space saving.

The storage tank 33 of the filter 2 of the present embodiment is shaped so that the volume of the lower part is smaller than that of the upper part. Specifically, the storage tank 33 has a wide portion at the upper side, a narrow portion at the lower side, and the wide portion and the narrow portion communicate with each other. Due to the provision of such a shape, so that the liquid level is high when the amount of liquid stored in the reservoir is low. When the liquid amount is small, air is difficult to bite in the pump when the liquid is sucked by the pump. By making the upper part wide, the volume of the storage tank 33 is increased.

A pump 35 for suctioning the liquid stored in the storage tank 33 is connected to the bottom portion of the storage tank 33 of the filter of the present embodiment. Since the liquid after filtration is supplied to the pump 35, it is possible to prevent the wear and damage of the pump 35 caused by the contamination of the pump 35 with dust.

In the filter 2 of the present embodiment, the liquid before filtration is dissipated evenly from the liquid supply section 22 to the filter medium 72. For this reason, it is prevented that the refuse contained in the liquid before filtration concentrates on the arbitrary locations of the filter medium 72. That is, since the supply of the liquid before filtration to the filter medium is unlikely to be uneven, it is possible to prevent a part of the filter medium 72 that does not contribute to the filtration from being generated.

When filtration is performed by laying the filter medium on the bottom of the tank storing the liquid before filtration, there is a problem that a large hydraulic pressure is applied to the filter medium. When the filter medium is clogged, the liquid level further rises and the pressure of the liquid acting on the filter medium further rises. If it is attempted to wind up the soiled filter medium in such a state and supply the unpolished filter medium, there is a problem that the filter medium may be damaged by the hydraulic pressure. In the filter 2 of the present embodiment, the diffusion of the liquid before filtration to the filter medium is performed in the air. And filtration is not performed in the state which immersed the filter medium in the liquid before filtration, but it disperses the liquid before filtration with respect to a filter medium. For this reason, a large hydraulic pressure does not act on the filter medium. Since a large hydraulic pressure is prevented from acting on the filter medium when the dirty filter medium is discharged to the second part, the supply of the non-dirty filter medium to the filtration chamber 27 and the stain to the second part Filter paper can be discharged smoothly.

The upper limit position of the liquid level detected by the floating sensor should be set close to the filter medium so that the floating sensor does not interfere with the filter medium so that the liquid level does not rise too much when the filter medium 72 is clogged. Is preferred. In this way, the dirty filter medium is discharged to the second storage chamber 28 before the liquid level rises excessively, so that it is possible to prevent the liquid level from rising excessively.

[Dust collector]
Next, a dust collector 1 including the above-described filter 2 and the dust collector 5 shown in FIG. 1 will be described.

The dust collector 5 shown in FIG. 1 is provided below the duct 51 and a duct 51 for sucking a gas containing dust, and stores a liquid for collecting dust contained in the gas sucked from the duct 51. The first collection tank 52, a second collection tank 53 for storing a liquid that collects liquid contained in the gas that has passed through the first collection tank 52, and the gas inside the dust collector 5 are suctioned and suctioned. And a blower 54 for discharging the exhausted gas to the outside.

In the first collection tank 52, among the dust sucked from the duct 51, dust having a large specific gravity is collected. Dust having a large specific gravity is repelled by contacting the inner wall of the duct 51 or the like, and is settled and collected in the liquid stored in the first collection tank 52. The liquid stored in the collection tank may be selected according to the specific gravity of the dust. For example, it is possible to use water as the liquid.

The first collection tank 52 and the second collection tank 53 are separated by the first partition 55, and the liquid stored in the first collection tank 52 and the liquid stored in the second collection tank 53 And it is kept from mixing.

A second partition 56 is disposed above the first partition 55. A gap 57 is provided between the first partition 55 and the second partition 56. In the gap 57, a plurality of angles 591 are disposed. The gas from which dust having a large specific gravity has been removed in the first collection tank 52 travels between the plurality of angles 591 disposed in the gap 57 to the upper part of the second collection tank 53.

An arc-shaped portion 58 and a third partition wall 59, a plurality of angles 60, and a plurality of baffle plates 61 are provided in the upper part of the second collection tank 53 in the order described from the bottom to the top. Most Between the upper end of the baffle plate 61 and arcuate portion 58 positioned below is provided with a gap 581, a plurality of angle 60 to the gap 581 is eclipsed set. The lower end portion of the arc-shaped portion 58 is in a state of being immersed in the liquid stored in the second collection tank 53.

When the gas from which dust having a large specific gravity is removed enters the arc-shaped portion 58, the gas and the liquid are vigorously stirred in the arc-shaped portion 58 to generate mist. The gas from which dust having a large specific gravity is removed in the first collection tank 52 still includes dust having a small specific gravity. When the gas and the liquid are vigorously stirred in the arc-shaped portion 58, a part of the dust having a small specific gravity contained in the gas is directly collected by the liquid stored in the second collection tank 53. Furthermore, a part of the dust having a small specific gravity also adheres to the mist of the liquid generated in the arc-shaped portion 58. When the small dust adheres to the mist, it moves above the arc-shaped portion 58 and contacts the plurality of angles 60 and the plurality of baffles 61, the mist gathers and changes into water droplets. The plurality of water droplets move to the top of the third partition 59 while collecting, drop from the through hole provided in the third partition 59, and merge with the liquid stored in the second collection tank 53. Dust having a small specific gravity is collected by the liquid contained in the second collection tank 53 as described above.

As described above, the gas from which the dust having a large specific gravity and the dust having a small specific gravity are removed is discharged to the outside of the dust collector 5 through the blower 54. The space above the second collection tank 53 is separated from the space of the first collection tank 52 by the partition wall 62. For this reason, the gas containing dust does not mix in clean gas.

As described above, in the first collection tank 52, dust having a large specific gravity is mainly collected. The dust with a high specific gravity is in the state of settling to the liquid, so the liquid is not so dirty. On the other hand, in the second collection tank 53, dust having a small specific gravity is mainly collected. Dust with a low specific gravity is difficult to settle. In addition to this, the liquid level of the second collection tank 53 is constantly stirred by the gas drawn by the blower 54. For this reason, the liquid stored in the second collection tank 53 becomes dirty in a relatively early time as compared with the first collection tank 52.

When the concentration of the small specific gravity dust contained in the second collection tank 53 becomes high, the following problems occur. The liquid surface of the second collection tank 53 is constantly stirred by the gas drawn by the blower 54, and water droplets and mist are generated. Some of the water droplets and mist adhere to the inner wall of the dust collector 5 and are dried. When the water droplets and mist dry, the small specific gravity dust contained in them is pulverized again. Then, a part of the powdered dust leaks out of the dust collector 5 from the blower 54. In order to prevent such a problem, the liquid in the second collection tank 53 has to be replaced frequently. In addition to the complicated liquid replacement work of the collection tank 53, there is a problem that the operation of the dust collector can not but be stopped during the liquid replacement work.

In the dust collection device 1 of the present embodiment, as shown in FIG. 1, a pipe extending from the above-described pump 35 is connected to the second collection tank 53 of the dust collector 5. The second collection tank 53 of the dust collector 5 and the liquid supply unit of the filter 2 are in communication by means of piping. That is, the storage tank 33 of the filter 2 and the second collection tank 53 of the dust collector 5 form a circulation path.

When the pump 35 is operated, the filtered liquid stored in the storage tank 33 of the filter 2 is sucked by the pump 35 and returns to the second collection tank 53 of the dust collector 5. When the filtered liquid is returned to the second collection tank 53 of the dust collector 5, the liquid is pushed out to the liquid supply unit 22 in accordance with the amount of the returned liquid. Thus, when the pump 35 is operated, the liquid is contained in the liquid stored in the second collection tank 53 while being circulated between the second collection tank 53 of the dust collector 5 and the storage tank 33 of the filter 2. Dust is filtered.

In the dust collection device 1 described above, the liquid contained in the liquid collected in the second collection tank 53 is filtered while the liquid circulates between the filter 2 and the dust collector 5. For this reason, the liquid stored in the second collection tank 53 of the dust collector 5 is always filtered, and the clean state is maintained. Therefore, even if the liquid stored in the collection tank is not replaced, it is possible to prevent dust from leaking out of the dust collection device 1. In addition, since the frequency of replacing the liquid stored in the collection tank can be reduced, the operation time of the dust collection apparatus can be extended.

When the operation of the dust collection device 1 is continued, the filter 2 is operated to continue the filtration. In the filter 2, the filter medium 72 is clogged while the filtration is continued. When the filter medium 72 is clogged, the sensor 34 detects an increase in the liquid level in the filtration chamber 27. Then, the drive unit 21 operates to wind up the soiled filter medium and discharge it to the second storage chamber 28 and the soiled filter medium 72 is supplied from the first storage chamber 24 to the filtration chamber 27. Ru. The replacement of the soiled filter medium 72 can be carried out without stopping the operation of the dust collector 5 and the filter 2. Therefore, the operation time of the dust collection device 1 can be extended.

In the dust collecting apparatus 1 of the present embodiment, if there is at least a single pump, the second collection tank while circulating the liquid between the second collection tank 53 and the reservoir tank 33 of the filtration unit 2 dust collector 5 Dust contained in the liquid stored in 53 can be filtered. Therefore, if the configuration as described above is adopted, it is possible to make the dust collection device 1 compact and save space. The control of the pump is also sufficient for one pump, so the design can be simplified. This makes it possible to reduce the frequency of failures and simplify maintenance. It also makes it possible to reduce the consumption of power.

The dust collection device 1 described above includes a first collection tank 52 and a second collection tank 53. As a single collection tank of the dust collector, a pump may be connected to the collection tank to connect the collection tank and the liquid supply unit of the filter.

71 liquid containing dust 2 dust filter 72 filter medium 21 drive unit 22 liquid supply unit 33 storage tank 35 pump 5 dust collector 34 sensor 1 dust collector

Claims (7)

A dust filter for removing dust from a liquid containing dust, comprising:
The dust filter comprises a first portion for storing unfiltered filter medium, a second portion for discharging the dirty filter medium, a filter medium spread between the first portion and the second portion, and a filter medium And a liquid supply unit for supplying a liquid containing dust to the filter medium spread between the first portion and the second portion,
When the filter medium is soiled, the drive section supplies unfiltered filter medium from the first portion, and the soiled filter medium can be discharged to the second portion,
The liquid feed unit is a dust filter that dissipates liquid containing dust to the filter medium. There is further provided a reservoir for storing the filtered liquid,
By suctioning the filtered liquid stored in the storage tank by the pump,
The dust filter according to claim 1, wherein the pump is supplied with the liquid after filtration. The dust filter according to claim 1 or 2, further comprising a sensor that detects that the filter medium is clogged, and the presence or absence of driving of the drive unit is controlled based on a signal from the sensor. A dust collector including a dust collector and a filter,
The filter includes a first portion for storing the uncleaned filter medium, a second portion for discharging the dirty filter medium, a filter medium spread between the first and second portions, and a filter medium. A driving unit for moving, and a liquid supplying unit for supplying a liquid containing dust to the filter medium spread between the first portion and the second portion,
When the filter medium is soiled, the drive section supplies unfiltered filter medium from the first portion, and the soiled filter medium can be discharged to the second portion,
The liquid supply unit is a dust collector for dissipating liquid containing dust to the filter medium. The dust collector is equipped with a collection tank for storing liquid that collects dust,
The dust filter is equipped with a reservoir for storing the filtered liquid,
By suctioning the filtered liquid stored in the storage tank with a pump, and supplying the filtered liquid to the collection tank of the dust collector,
The dust collecting apparatus according to claim 4, wherein the pump is supplied with the liquid after filtration. The pump is connected to the storage tank of the dust filter and the collection tank of the dust collector,
The collection tank of the dust collector communicates with the liquid supply unit of the dust filter,
By operating the pump, the filtered liquid stored in the storage tank is returned to the collection tank of the dust collector, and the liquid containing dust in the collection tank is pushed out to the liquid supply portion to collect the collection tank and dust of the dust collector. The dust collector according to claim 5, wherein dust contained in the liquid stored in the collection tank is filtered while circulating the liquid between storage tanks of the filter. The dust collector is equipped with a collection tank for storing liquid that collects dust,
The dust filter is equipped with a reservoir for storing the filtered liquid,
The dust collector according to any one of claims 4 to 6, wherein the dust contained in the liquid stored in the repair tank is filtered while circulating the liquid between the collection tank of the dust collector and the storage tank of the dust filter.

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