JP3827483B2 - Dust collector with fire countermeasure function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collector that can collect dust generated during welding work or laser processing, and specifically, fume dust (fire powder) with high thermal energy generated by each of these works, and the like. The present invention relates to a dust collector equipped with a fire countermeasure function capable of preventing a fire accident caused by the above.
[0002]
[Prior art]
A pre-dust separator (pre-dust box) that can be connected to the front stage of a filtration dust collector to separate and collect spark dust and the like to prevent a fire of the dust collector has been conventionally used in, for example, Japanese Utility Model Publication No. 57-12212, There are those described in JP-A-57-35723, JP-A-57-35724, and the like, both of which separate and collect dust using nonflammable filters. In particular, it can exhibit an excellent effect in collecting dust that causes fire such as sparks.
[0003]
On the other hand, Japanese Patent Application Laid-Open Nos. 9-52010 and 10-235123 disclose a pre-dust separator using a cyclone or centrifugal force. It also makes it possible to separate and collect sparks and other fire hazards.
[0004]
[Problems to be solved by the invention]
All of these conventional pre-dust separators can rotate and centrifuge hot particles having a large mass such as fume and sparks, and collect the separated hot particles in the lower dust bucket. Since the hot particles collected in the dust bucket continue to have high ignition energy, there is a risk that the collected dust will ignite in the dust bucket.
[0005]
Furthermore, according to the conventional pre-dust separator, all the hot particles having a large mass are essentially centrifuged and collected in a dust bucket. However, since the absolute amount is large, a small amount of fire powder is placed on the dust collector side. If it is sucked, it may ignite the filter or accumulated dust and cause a fire, or it may ignite due to heat accumulation due to concentrated adhesion to the filter, and when such bag filter etc. is ignited or ignited There was also a risk that the dust collector would explode due to the generated combustion gas.
[0006]
Therefore, the technical problem of the present invention is that the thermal particles having a large mass and high thermal energy, which have been centrifuged by the pre-dust separator, are absorbed by heat absorption before being recovered in the dust bucket, and the high thermal energy is lost. An object of the present invention is to provide a dust collector having a fire countermeasure function that is devised so that it can be discharged into a bucket to prevent ignition.
[0007]
Furthermore, another technical problem of the present invention is that when a small amount of sparks is sucked into the dust collector side, or when combustion gas is generated by the attachment or ignition of a bag filter or the like, this is quickly detected to detect the dust collector. It is to provide a dust collector equipped with a fire countermeasure function devised to prevent the spread and explosion of fire.
[0008]
[Means for Solving the Problems]
Means taken in the present invention to solve the above technical problems are as follows.
[0009]
A separator that can separate and remove hot particles such as fumes and sparks that cause a fire from the dust-containing air that is sucked by the suction action from the dust collector in the front stage of the filter chamber of the dust collector A connected dust collector,
[0010]
(1) A separation cylinder that swirls the dust-containing air flowing into the separator from the inlet to separate the dust particles having a large mass to the outside by centrifugal force, and a lower part of the separation cylinder. The air introduction pipe that leads to the dust collector provided with the upper end opening upward at the center of the side, and the mass that is provided at the lower side of the separation cylinder at least and separated and dropped by the separation cylinder A dust absorption and discharge section that absorbs heat while crushing large dust particles and discharges them to the lower dust bucket. (Claim 1)
[0011]
(2) The dust endothermic discharge part of the separator is constituted by at least two rotating rollers that can crush dust particles and absorb heat while rotating relatively. (Claim 2)
[0012]
(3) At least two main rotary rollers capable of absorbing heat by crushing dust particles while relatively rotating the dust endothermic discharge part of the separator, and each main rotation while maintaining close contact with each other The dust particles elastically pressed against the bottom side of the roller and driven to rotate, and the dust particles discharged from between the main rotating rollers can be crushed again between the main rotating rollers to absorb heat at least 2 The auxiliary rotating roller of the book. (Claim 3)
[0013]
(4) A hot particle detection sensor capable of detecting hot particles flowing into the upper end port of the air introduction pipe protruding upward is provided on the upper part of the air introduction pipe provided in the separator. (Claim 4)
[0014]
(5) Provide a combustion gas sensor that can detect the combustion gas generated when the filter inside the dust collector, accumulated dust, etc. are attached and ignited in the clean air atmosphere of the dust collector connected to the separator. (Claim 5)
[0015]
(1) According to the means according to claim 1 described in the above (1), the large heat particles having a high thermal energy centrifuged by the separation cylinder are collected in the dust endothermic discharge part before being collected in the dust bucket. Since the heat is absorbed while being crushed by the air and discharged to the dust bucket while the heat energy is taken away, it is possible to reduce the possibility of landing and ignition in the dust bucket, while the air intake pipe leading to the dust collector Since the end opening is opened upward in the lower central portion of the separation cylinder, it is possible that the heat particles swirling along the peripheral surface of the separation cylinder are sucked to the dust collector through the air introduction pipe. Therefore, the dust collector can be made to suck only dust separated from the hot particles having a large mass.
[0016]
(2) According to the means according to claim 2 described in (2) above, the hot particles having a large mass centrifuged by the separation cylinder are transferred between two rotating rollers and are crushed by being pinched. In addition, since the surface area is increased by rolling and the heat is easily absorbed by the rotating roller, the heat energy is taken by the heat absorbing action of the rotating roller, and the particles are no longer likely to arrive or ignite. Can be discharged to the dust bucket side.
[0017]
(3) According to the means according to claim 3 described in (3) above, the two rotating rollers described in (2) above are formed as main rotating rollers, and the heat passed between the main rotating rollers. Since the particles are repeatedly nipped and rolled again between the main rotating roller and the auxiliary rotating roller that is driven and rotated, the particles are sufficiently deprived of heat energy as heat absorption and restraint time increase. Can be discharged to the dust bucket side.
[0018]
(4) According to the means according to claim 4 described in (4) above, since the detection sensor can detect the thermal particles flowing into the upper end port of the air introduction pipe connecting the separator and the dust collector, the detection sensor Can detect the occurrence of a fire particle, warn you by indicating the possibility of a fire or sound a buzzer, and stop the operation of the dust collector to prevent the spread of fire damage To.
[0019]
(5) According to the means according to claim 5 described in the above (5), the combustion gas generated when the filter of the dust collector or the accumulated dust is deposited and ignited can be detected by the sensor. If detected, the operation of the dust collector is immediately stopped to prevent the fire damage from spreading or to prevent the dust collector from exploding.
[0020]
As described above, the technical problems described above can be solved by the means (1) to (5), and the problems of the conventional techniques can be solved.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dust collecting apparatus having a fire countermeasure function according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the whole of the present invention in a partially broken state, and FIG. In these drawings, what is generally indicated by reference numeral 1 in these drawings is a filter-type dust collector using filters 4. The dust separator connected to the front stage of the filtration chamber 2B of the dust collector 1 using an air introduction pipe 16 is shown.
[0022]
The dust collector 1 is divided into an air purifying chamber 2A and two upper and lower chambers of the filtration chamber 2B by a partition plate 2, and a plurality of filters 4 are suspended in the filtration chamber 2B, and the lower side thereof Are provided with a dust bucket 3 that collects dust DS that has been removed from its own weight or filter 4..., While a blower 6 that is rotated by a motor 6M and an upper end port 4A of each filter 4. On the other hand, a blow tube 5 for blowing compressed air (pulse jet) for dust removal sent from the header pipe 5P and a discharge port 7 for clean air filtered by each filter 4 are provided.
[0023]
A main separator cylinder 12 having a substantially conical section is provided inside the dust separator 10, and the outer side surface of the separator 10 is subjected to the suction action of the blower 6 of the dust collector 1. An inflow port 11 is provided for allowing dust sucked from a welding operation unit, a laser processing unit, or the like to flow in the tangential direction of the separation cylinder 12 and to swirl around the dust.
[0024]
Reference numeral 15 denotes an auxiliary separation cylinder having a substantially conical cross section, which is provided on the lower side of the main separation cylinder 12 with an interval in the vertical direction. The auxiliary separation cylinder 15 has an inclination angle as shown in FIG. It is formed to be substantially the same as the inclination angle of the main separation cylinder 12, and the tip side of the above-described air introduction cylinder 16 bent up into a substantially L shape has the inner center of the auxiliary separation cylinder 15 upward from the bottom. The upper end port 16A, which is inserted toward the center and located in the middle of the interval, is constructed to open upward from the lower side of the main separation cylinder 12 toward the center.
[0025]
Next, 17 is a hopper provided on the bottom surface of the separator 10, and 20 and 20 ′ are main rotations arranged side by side parallel to the lower part of the bottom outlet 17 T (see FIGS. 5 to 8) of the hopper 17. The rollers 21 and 21 'are auxiliary rotating rollers which are installed in parallel on the lower side of the main rotating rollers 20 and 20' in the left-right direction. The two rollers 20, 20 'and 21, 21' An endothermic discharge part is configured.
[0026]
18 is a dust bucket provided on the lower side of the hopper 17, 17A is a column installed in parallel with the upper side of the main rotating rollers 20, 21 ', and each of these main and auxiliary components constituting the dust endothermic discharge part. The rotating rollers 20, 20 'and 21, 21' are made into a roller shape using, for example, a metal material such as stainless steel so as to increase the surface area by crushing and rolling the hot particles while smoothly feeding them. In addition, knurls, short peening, fine module gears, and the like are formed on the surface of at least the main rotating rollers 20 and 20 '.
[0027]
FIG. 3 is a plan view of the left and right main rotary rollers 20 and 20 ′ constituting the dust heat absorption and discharge part as viewed from above, and FIG. 4 is an exploded view of one rotary drive part of the main rotary rollers 20 and 20 ′. FIG. 5 is a side view of the assembled state. In these drawings, 19 and 19 are left and right brackets attached to the left and right sides of the hopper 17, respectively. The main rotating rollers 20 and 20 'are rotatably mounted between the left and right brackets 19 and 19, respectively.
[0028]
Reference numerals 20A and 20X denote a drive rotary shaft and a support rotary shaft that protrude from both ends of the main rotary rollers 20 and 20 ', respectively. These rotary shafts 20A and 20X correspond to the main rotary rollers 20 and 20', respectively. As shown in FIG. 3, the drive rotary shafts 20A and 20A side of the main rotary rollers 20 and 20 ′, that is, the drive end side are provided on the end face portion relatively to the left and right using fixed bearings 20S and 20S. The support shafts 20X and 20X of the rollers 20 and 20 ', that is, the free end sides, are slide holes provided in the left and right brackets 19 and 19, respectively. It is rotatably supported by movable bearings 20V and 20V that are movably fitted in 19X (see FIG. 4).
[0029]
Reference numeral 22 denotes a synchronous motor fixed to the end face of each fixed bearing 20S by screwing mounting screws 22S and 22S into screw cylinders 20T and 20T, respectively, as shown in FIG. The main rotary rollers 20 and 20 'are connected to the drive rotary shafts 20A and 20A, and the main rotary rollers 20 and 20' are moved in the direction of the arrow shown in FIGS. While rotating relatively, the free end sides supported by the movable bearings 20V and 20V of the main rotating rollers 20 and 20 'are stretched between the movable bearings 20V and pins 20E and 19T projecting from the bracket 19. Due to the traction force of the first traction spring 23, the main rotation rollers 20 and 20 ′ are elastically pressed against the peripheral surfaces of the drive end sides of the opposing main rotation rollers 20 and 20 ′. Exhibits an endothermic discharge action for feeding downward while rolling by crushing heat particles coming fed between La 20, 20 'has a mechanism.
[0030]
Reference numeral 24 denotes a support plate that rotatably supports both ends of the two auxiliary rotating rollers 21 and 21 ', and 24A and 24A' are guide long holes that are formed in each support plate 24 in an inverted C shape. The long shafts 24A and 24A 'are respectively fitted with the rotation shafts 21A and 21A' of the auxiliary rotating rollers 21 and 21 'so as to be slidable, and both end portions of the column 17A and the support plates 24 are fitted. A second traction spring 25 is stretched between the auxiliary rotation rollers 21, 21 ′ and the auxiliary rotation rollers 21, 21 ′ are pressed against each other by the traction force (pull-up force) of the spring 25. Are elastically pressed against the bottom surfaces of the main rotating rollers 20 and 20 ', and are rotated in the directions of the arrows shown in FIGS. 6 to 8 in conjunction with the main rotating rollers 20 and 20' by the frictional force. Made up of a structure That.
[0031]
In FIG. 4, reference numeral 17B denotes a spring fixing screw attached to the column 17A. In FIGS. 5 to 8, 17X and 17X denote left and right guide plates of the hopper 17.
[0032]
Since the dust collecting apparatus having a fire countermeasure function according to the present invention has the above-described configuration, the dust collecting device is sucked into the separator 10 from the inlet 11 by receiving the suction action of the blower 6 provided in the dust collector 1. The dust air is guided by the main separation cylinder 12 and the auxiliary separation cylinder 15 and swirls around it. As a result, large-sized dust particles including thermal particles are separated by centrifugal force and contain other fine dust. The airflow is sucked into the dust collector 1 through the air introduction cylinder 16 and filtered by the filter 4. Next, the dust particles having a large mass including the separated heat particles (hereinafter simply referred to as heat particles). The operation of the dust endothermic discharge section that absorbs heat while crushing the) will be described with reference to FIGS. 6 to 8.
[0033]
In each of the above drawings, HS ... are hot particles separated by centrifugal force, and these hot particles HS ... falling into the hopper 17 due to their own weight while turning are the left and right guide plates 17X, 17X. 7 and is fed between the left and right main rotating rollers 20 and 20 ', which rotate relatively as shown in FIG. 7, from the bottom discharge port 17T. Here, as shown in FIG. Since the surface area is increased by being crushed into the rolling shape HT by the contact action, the endothermic action CF by the main rotating rollers 20 and 20 ′ is effectively performed.
[0034]
Next, the heat-absorbed heat particles HV that have passed between the two main rotating rollers 20 and 20 'are elastically contacted with each other as shown in FIG. 8, and rotate between the other main rotating roller 20' and the auxiliary rotating roller 21 '. Or between the one main rotating roller 20 and the auxiliary rotating roller 21, where the endothermic action CF by crushing and rolling by each roller is repeated again, and along with the increase in the endothermic time, The particles HD from which sufficient heat energy has been taken can be dropped and collected to the dust bucket 18 side.
[0035]
Further, the column 17A described above is provided on the vertical contact line between the main rotating rollers 20, 20 'as shown in the figure, and is formed when the large-diameter heat particles HS pass between the rollers 20, 20'. The heat particles HS are prevented from passing directly through the gaps, and the heat particles HS collide with the column 17A as shown by the arrow L in FIG.
[0036]
Next, in FIGS. 1 and 2, reference numeral 14 denotes a sensor chamber provided on the ceiling surface of the separator 10 described above, and in FIG. 2, 14 T denotes a thermal particle detection sensor provided in the sensor chamber 14. Thus, for example, the thermal particle detection sensor 14 using an infrared sensor sends a detection signal toward the inside of the upper end port 16A of the air introduction cylinder 16 to check whether the thermal particle HS has entered the air introduction cylinder 16 or not. When detecting and detecting the intrusion of the hot particles HS, an alarm device such as a buzzer is operated as shown in FIG. 9, or the possibility of fire occurrence is displayed on the display section provided in the control panel 8 shown in FIG. 1 and FIG. 2, reference numeral 13 denotes a duct for sending virgin air from the air cleaning chamber 2 </ b> A of the dust collector 1 into the sensor chamber 14. By feeding the over, it is configured to maintain at all times clean state the heat particle detection sensor 14.
[0037]
In FIG. 2, 9 is a combustion gas sensor provided in the air cleaning chamber 2A of the dust collector 1, and this sensor 9 is a combustion generated when the filter 4 or accumulated dust in the dust collector 1 is attached and ignited. When the presence or absence of gas is detected and combustion gas is detected, the operation of the dust collector 1 is immediately stopped as shown in FIG. 9 to prevent the fire damage from spreading and to prevent the dust collector 1 from exploding. It is configured.
[0038]
【The invention's effect】
As described above, according to the dust collector equipped with the fire countermeasure function according to the present invention, the hot particles sucked into the separator are swirled and centrifuged, and then the hot particles were crushed and absorbed heat. After that, since it is collected in the dust bucket, it is possible to reduce the possibility that the dust collected in the dust bucket will be ignited and ignited, and if the hot particles that are turning are sucked through the air introduction pipe to the dust collector side, Because the detection sensor notifies this, it is possible to prevent the dust collector from generating a fire.Furthermore, when a filter or accumulated dust in the dust collector gets stuck and ignites, the combustion gas sensor detects the combustion gas and operates the dust collector. It can stop and prevent the spread of fire damage and explosion of the dust collector, and it can prevent fire caused by high thermal energy heat particles generated during welding work or laser processing. It is possible to provide a throng dust.
[Brief description of the drawings]
FIG. 1 is a perspective view of a dust collector having a fire countermeasure function according to the present invention, partially broken away.
FIG. 2 is a configuration diagram illustrating the internal structure of the present invention.
FIG. 3 is a plan view illustrating a configuration of a dust heat absorption and discharge portion provided in a hopper portion of the separator.
4 is an exploded perspective view showing the configuration of the drive unit for the dust heat absorption and discharge unit shown in FIG. 3; FIG.
FIG. 5 is a side view of the dust heat absorption / discharge section shown in FIG. 4;
FIG. 6 is a configuration diagram illustrating a state before hot particles are sent to a dust endothermic discharge unit.
FIG. 7 is a configuration diagram illustrating a state in which heat particles are crushed and absorbed.
FIG. 8 is a configuration diagram illustrating a state in which hot particles are crushed again to absorb heat.
FIG. 9 is a block diagram illustrating an operation procedure for preventing fire from occurring by each sensor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dust collector 4 Filter 6 Blower 9 Combustion gas detection sensor 10 Separator 11 Inlet 12 and 15 Separation cylinder 14T Thermal particle detection sensor 16 Air introduction cylinder 16A Upper end port 17 Hopper 18 Dust bucket 20, 20 'Main rotating rollers 21 and 21' Auxiliary rotating roller 22 Motor 23, 25 Traction spring HS Thermal particles

Claims (5)

A separator that can separate and remove hot particles such as fumes and sparks that cause a fire from the dust-containing air that is sucked by the suction action from the dust collector in the front stage of the filter chamber of the dust collector A connected dust collector,
A separation cylinder that swirls dust-containing air flowing into the separator from the inlet into the separator, and separates dust particles having a large mass to the outside by centrifugal force, and a lower central portion of the separation cylinder An air inlet pipe that leads to the dust collector provided with the upper end opened upward, and at least the lower side of the separation cylinder, and is separated by the separation cylinder and drops the large mass of dust. A dust collector equipped with a fire countermeasure function, characterized in that a dust heat absorbing and discharging unit that absorbs heat while crushing particles and discharges it to a lower dust bucket is provided. 2. The fire countermeasure function according to claim 1, wherein the dust endothermic discharge section of the separator is constituted by at least two rotating rollers capable of crushing dust particles and absorbing heat while rotating relatively. Dust collector equipped. At least two main rotating rollers capable of squeezing dust particles and absorbing heat while rotating the dust endothermic discharge part of the separator, and the bottom surface of each main rotating roller while maintaining close contact with each other At least two auxiliary units that can be elastically pressed to the side and driven to rotate, and the dust particles discharged from between the main rotating rollers can be crushed again and absorbed by each main rotating roller 2. A dust collecting device having a fire countermeasure function according to claim 1, wherein the dust collecting device comprises a rotating roller. 2. A hot particle detection sensor capable of detecting hot particles flowing into an upper end port of an air introduction pipe protruding upward is provided on an upper portion of the air introduction pipe provided in the separator. Dust collector equipped with a fire prevention function. A combustion gas sensor capable of detecting combustion gas generated when a filter or accumulated dust inside the dust collector ignites and ignites in the clean air atmosphere of the dust collector connected to the separator. Item 1. A dust collector equipped with the fire countermeasure function according to Item 1.

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