JP5346251B2 - Dust collector with blast dissipation function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector with a blast diffusion function which can lessen damages on the body as much as possible at the time of powder explosion, can lower the risk of powder explosion and moreover, prevents blowing off of a diffusion cover at the time of powder explosion to avoid the risk on the surroundings, and the maintenance of the portion neighboring to an opening for the diffusion can be carried out with ease and thus it is safely usable also when installed in the outdoors. <P>SOLUTION: The dust collector is so configured as to filter powder dust suctioned in a dust collection chamber 2 of a body 1 through a suction port by a suctioning action of rotation of a fan 11 for dust collection with a filter 9 installed in the dust collection chamber 2 and discharge filtered clean air to the outside of the body 1 through a discharge port 20E and in the dust collector; a diffusion port 4H for releasing pressure and/or frames to atmospheric air at the time of powder explosion is opened in the upper face and the shape of the whole body is formed in a manner that a diffusion chamber formed to have an approximately reversely trapezoidal cross-section with a gradually widened cross-sectional surface area toward the diffusion port 4H from a lower side part is continuously installed while being communicated to one side part of the dust collection chamber. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a dust collector that collects dust-containing air containing dust, particularly when dust-containing air containing dust that has a risk of dust explosion such as metal powder, resin powder, and grain powder is collected. The present invention relates to a dust collector with a blast radiating function, which is suitable for use in the above.

  When energy from an ignition source such as sparks is applied in a state where dust of a certain concentration or more is floating in the gas, an explosion may occur, which is called dust explosion. The risk of dust explosion depends on the nature of dust, particle size distribution, shape, concentration, and the presence or absence of flammable gas. In particular, as a powder with a high possibility of dust explosion (hereinafter referred to as explosive dust), a high explosion index (Kst value), for example, metal powder such as aluminum, iron and zinc, resin powder such as epoxy, Examples thereof include food powders such as corn starch and starch. When collecting these explosive dust, the dust collector itself must be structured to prevent dust explosions from occurring inside the dust collector, or in the event of a dust explosion, minimizing damage to the surroundings. For this purpose, for example, various safety devices such as the explosion pressure dissipating device described in Patent Document 1 are provided.

Japanese Utility Model Publication No. 57-128323

  According to the explosion pressure dissipating device described in Patent Document 1, the pressure at the time of dust explosion generated in the aircraft is released to the upper atmosphere by opening (opening) the valve lid (radiation lid). However, in the conventional general structure of explosive pressure-dissipating dust collectors (hereinafter simply referred to as conventional dust collectors), a blast duct (dissipating tube) is provided at the top of the valve lid. Despite the opening of the lid, when the explosion pressure propagates upward through the blast duct, the internal pressure of the aircraft rises, resulting in severe damage to the fuselage and scattering of damaged parts. Or, there was a problem that the surrounding area is dangerous due to the diffusion of flames and blasts.

  Furthermore, in the conventional dust collector, the blast duct, the dust chamber, and the clean chamber equipped with the motor are all built in an integrated structure, so only a part of the aircraft was damaged by a relatively small dust explosion. Even in such a case, there is a problem that it takes a great amount of man-hours and costs because it is a replacement of the entire body.

  In addition, when collecting dust-containing air containing explosive dust, even if the filter is damaged or the filter is installed incorrectly, explosive dust is mixed in clean air that has passed through the filter. It is desirable to have a structure that prevents this explosive dust from entering an electric motor section such as a motor that can be an ignition source. However, in general, a dust explosion-proof motor having an external fan that cools itself and improving safety is often used as a motor that rotates a fan serving as a drive source.

  However, when a dust explosion-proof motor is used in a conventional dust collector, a part of the upper surface of the fuselage (top plate of the motor) is opened, and the opening of the exhaust stack and the opening of the upper surface of the fuselage are close to each other. It will become a structure that ends up.

  In the case of such a structure, when a part of the clean air that has passed through the exhaust pipe is drawn by the suction force of the fan outside the motor, and explosive dust is mixed in the clean air as described above, Explosive dust floats around the motor, and in the worst case, a dust explosion occurs.

  Normally, in the event of a dust explosion, the valve lid (dispersion port lid) is periodically opened and closed to check whether it operates normally, and dust accumulates around the vent. If it is deposited, maintenance such as cleaning and removal is performed.

  However, in the conventional dust collector, the diffusion port is located in the back of the dust collecting chamber, and generally no maintenance door or the like is provided. Therefore, it is difficult to perform maintenance around the diffuser, and it is very troublesome to check the opening / closing operation of the diffuser hole lid, which is particularly important, and the valve lid (diffuse port lid) does not open during a dust explosion. A malfunction may occur.

  In addition, when a large-scale dust explosion with high explosion energy occurs, the valve lid (radiation cap) may be blown away by the blast. However, in the conventional dust collector, only the hinge piece and the suspension piece are engaged, and when a large-scale dust explosion as described above occurs, the valve lid (dispersion port lid) blows away. In other words, when the blown-off diffuser lid falls, there is a possibility that a worker or the like to the surrounding area may be dangerous.

  Furthermore, basically, in consideration of safety, a dust collector that collects explosive dust is often installed outdoors. However, the conventional dust collector has a problem that it cannot be installed outdoors because rainwater enters from the exhaust pipe and causes malfunction of the blower.

  Therefore, the technical problem of the present invention is to reduce the dust collector damage at the time of dust explosion, reduce the risk of dust explosion, and further prevent the diffusion lid from blowing off at the time of dust explosion. The purpose is to provide a dust collector with a blast radiating function that can avoid danger to the surroundings, can easily maintain the vicinity of the diffuser (such as a lid and a hinge), and can be installed outdoors.

(1) In order to solve the above technical problem, a dust collector with a blast radiating function according to claim 1 of the present invention is a dust collection chamber inside the fuselage from the suction port by a suction action by rotation of a dust collecting fan. The dust collector is configured to filter the dust sucked into the filter through a filter provided in the dust chamber and to discharge the clean air after the filtration to the outside of the machine body through the exhaust port,
An opening for opening the pressure and / or flame at the time of dust explosion to the atmosphere is opened on one side of the dust collection chamber, and the overall shape of the discharge port is lower than the lower side. An upper side of the dust collector excluding the upper part of the diffuser port, and a diffuser chamber formed in a substantially inverted trapezoidal shape with a cross-sectional area gradually increasing toward the diffuser port. The roof is covered with a roof, and a protective cover is provided around the diffuser to guide the blast diffused from the diffuser at the time of dust explosion toward the upper side of the diffuser. A space is provided between the protective cover and the surrounding part of the diffuser opening up and down. The diffuser is normally closed, and is opened upward by the explosion pressure during a dust explosion. A diffusion lid that can open the It is characterized by being attached with a downward slope toward the gap with the bar .

( 2 ) In the dust collector with a blast radiation function according to claim 2 of the present invention, the dust collecting fan and a motor for rotating the dust collecting fan are housed inside the dust collecting chamber. provided clean room, to cover the upper surface opening of the clean room by said roof, on the roof, the exhaust for discharging the clean air filtered by the filter in accordance with the rotation of the dust collecting fan outside the clean room and mouth, is characterized in that the suction port for taking the cooling air of the motor is provided.

( 3 ) Moreover, the dust collector with a blast radiation function which concerns on Claim 3 of this invention has the exhaust path which guides the clean air which filtered the inside of the roof with the said filter to the said exhaust port inside the said roof. A partition plate for partitioning the motor cooling air into a suction path for taking in air from the suction port is provided.

( 4 ) Moreover, the dust collector with a blast radiation function according to claim 4 of the present invention is characterized in that the dust collection chamber and the clean chamber are configured to be separable from each other.

( 5 ) Further, in the dust collector with a blast radiating function according to claim 5 of the present invention, the diffusing lid for closing the radiating opening is temporarily fixed to the dust collecting chamber side by a fastener at least at one end. An opening / closing shaft projects from the other side of the other end, and the tip side of the opening / closing shaft is fitted into a long hole of a hinge provided in the dust collecting chamber so as to be movable up and down. It is characterized by a nut with a lock.

( 6 ) Further, in the dust collector with a blast radiating function according to claim 6 of the present invention, an inspection lid is provided on the side surface of the protective cover so that the radiating port and its peripheral portion can be maintained. It is a feature.

  According to the means according to claim 1 described in (1) above, the upper part of the dust collector is provided with a roof for protecting rainwater that can be installed outdoors, and there is no blast duct (diffuse pipe). Due to the structure, even when a dust explosion occurs in the dust collection chamber, the diffusion lid at the top of the diffusion opening opens instantly, and the explosion pressure is quickly released into the atmosphere, minimizing damage to the dust collector. It can be stopped.

Further, according to the means according to claim 1 described in the above (1), the strength of the dust collecting chamber is improved by the diffusion chamber formed in a substantially inverted trapezoidal cross section continuously provided on one side of the dust collecting chamber. (The diffusion chamber is fixed to the dust collection chamber by welding and serves as a reinforcement, and the strength of the dust collection chamber is improved.) At the same time, accumulation of explosive dust is prevented. It plays the role of guiding the blast and flame to the outlet.

Further, according to the means according to claim 1 described in the above (1), a protective cover for protecting the blast and flame at the time of the dust explosion is provided around the diffusion port, so that the blast and flame are directed upward. Safety to the surroundings can be ensured by guiding to.

In addition, according to the means according to claim 1 described in the above (1), (including rain water that falls on the dissipation lid top) penetrated rainwater into the opening of the protective cover, communicating around the dissipation opening vertically In addition to flowing down to the ground or the base side due to the gaps (spaces) , the radiating lid is inclined downward toward the gaps, so that rainwater does not accumulate on the protective cover or the upper part of the diffusing lid. Furthermore, dead leaves and dust do not accumulate and do not hinder the opening and closing of the diffusion lid. In addition, by providing a protective cover around the vent that is larger than the vent and reduces the pressure during a dust explosion, it can protect the surroundings from the blast and flame generated from the vent during a dust explosion. it can.

According to the measures according to claim 2 as described above (2) is provided with the suction port to cool the air outlet and a motor for discharging the clean air to the roof, each clean air outlet to the fuselage and the motor cooling This eliminates the need to provide a suction port, simplifies the structure of the fuselage, and allows it to be manufactured at low cost. Further, since the air suction direction for cooling the motor is taken into the apparatus from the opposite direction to the exhaust direction of the clean air filtered by the filter, an excellent cooling effect can be exhibited. Usually, since the temperature outside the machine is lower than inside the machine, the motor can be efficiently cooled by sucking the air outside the machine.

According to the measures according to claim 3 mentioned above (3), any chance, the filter is damaged, even if the clean air explosive powder there is incomplete mounting of the filter is mixed, the explosive Because it has a structure with a partition plate that does not enter the surroundings of motors, casings, fans, etc. in a clean room that can be an ignition source, it is possible to suppress the risk of dust explosion .

According to the measures according to claim 4 as described above (4), for clean room and a dust collecting chamber is separable structure, for example, when the dust explosion occurs, possible to replace the dust collecting chamber only Is also possible. Furthermore, during maintenance such as fan replacement, the maintenance can be performed by removing only the clean room, so that replacement can be performed easily and work efficiency is good.

According to the measures according to claim 5 as described above (5), the blowout preventer dissipation lid comprising locking nut, the blast during dust explosion, because it is never blown dissipation lid, the surrounding Safety is ensured.

According to the measures according to claim 6 described in the above (6), by providing the inspection lid in the protective cover, it is possible to perform maintenance of the peripheral dissipation port easily.

More over that, the (1) to solve the technical problems described above by means mentioned to (6), it is possible to solve the problems of the prior art.

  According to the dust collector with a blast radiating function according to the present invention, it is possible to install it outdoors by providing a roof at the top of the dust collector, improving safety to the surroundings, and by damage to the filter. Since the structure is such that unfiltered air does not easily enter a clean room containing a motor, casing, and fan that can serve as an ignition source, there is an effect of suppressing the risk of dust explosion.

In addition, according to the present invention, the diffuser lid is attached with a downward slope toward the gap between the diffuser and the protective cover, and the upper and lower sides are disposed between the diffuser and the protective cover. Since the above-mentioned gap communicating with the water is provided, rainwater does not collect on the upper surface of the diffusion lid, and furthermore, dead leaves, dust, etc. accumulate and obstruct the opening and closing of the diffusion lid. Therefore, it has the advantage that the dust collector can be installed outdoors and used safely.

  On the other hand, even if a dust explosion occurs for some reason, the blast and flame are guided to the divergence port by the diffusion chamber configured in the inverted trapezoidal cross section provided in the dust collection chamber, and instantly by opening the radiating lid It is possible to minimize the damage to the dust collector by opening the explosion pressure to the atmosphere.

  Furthermore, since the dust collection chamber and the clean room can be separated, it is possible to replace the parts that are severely damaged during the explosion and to use the minor parts, and to protect the area around the vent. It also has the effect of minimizing damage to the surroundings, such as the equipment of the cover and the function of preventing the blowout of the diffusion lid, and has the advantage that it can be used safely.

The perspective view which showed the external appearance of the dust collector with a blast diffusion function which concerns on this invention. Side sectional drawing explaining the internal structure of the dust collector with a blast diffusion function which concerns on this invention. The front sectional view explaining the internal structure of the dust collector with a blast diffusion function which concerns on this invention. The top view of the dust collector with a blast diffusion function which concerns on this invention. The top view explaining the flow of the clean air and motor cooling air in this invention. The top view of other implementation which enlarged the partition chamber shown by FIG. The top view which expanded and showed the hinge part periphery. The side sectional view which expanded and showed the circumference of a radiation lid.

  Hereinafter, embodiments of the dust collector with a blast radiating function according to the present invention will be described in detail with reference to the accompanying drawings. These embodiments are preferable specific examples of the present invention, and may have various technically preferable limitations. However, the technical scope of the present invention is not limited to these unless specifically limited to the present invention. However, the present invention is not limited to this embodiment.

  FIG. 1 is a perspective view showing the appearance of a dust collector with a blast radiating function according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an entire body of a dust collector, and inside the body 1 is a dust collection chamber 2, a clean room 3, and a diffusion chamber as shown in the sectional view of FIG. 2. 4 is provided, and the strength of the machine body 1 itself is improved by reinforcing each part of the dust collection chamber 2 and the like in case of a dust explosion.

  A filter inspection door 5 and a bucket door 6 are attached to the front side of the dust collection chamber 2 by hinges 5T and 6T, and a filter dusting handle 7 and a check valve 8X are provided on the right side of the airframe 1 from the front side. Is provided with a cylindrical suction port 8. Further, the hinges 5T and 6T of the doors 5 and 6 are reinforced to improve the strength. The filter inspection door 5 is a door for use when checking and replacing the filters 9 provided in the clean room 3. Further, the bucket door 6 is a door for use in removing dust collecting dust accumulated in the bucket 6Z configured to be drawn out and inspecting the bucket 6Z. Further, reinforcing plates 5K and 6K are attached to the front surfaces of the filter inspection door 5 and the bucket door 6 to improve the strength.

  The check valve 8X provided in the suction port 8 for sucking dust-containing air containing explosive dust is connected to the suction port 8 when a dust explosion occurs in the dust collector. In addition to preventing propagation to a suction duct (not shown), it also protects surrounding workers from blast and flame. The filter knocking handle 7 is structured such that when the handle 7 is reciprocated in the left-right direction (axial direction) with respect to the front surface, dust adhering to the filters 9 (see FIG. 2) is knocked into the bucket 6Z.

  Inside the clean chamber 3, a motor 10 for sucking dust-containing air containing explosive dust, a fan 11, a casing 12 for storing the fan 11, and an exhaust duct vertically connected to the casing 12. 3X is built-in. Reference numeral 14 denotes a motor inspection door, which is provided on the front surface of the clean room 3, and is a door that is used by opening the inspection port 3H when inspecting the motor 10 and the fan 11.

  15 is an electrical box attached to the outer surface of the clean room 3, and various switches 15S such as a start switch for starting the operation of the dust collector and a stop switch for stopping the operation are attached to the front surface. Has a built-in power distribution device (not shown). Further, the electrical box 15 has a dustproof structure in which the inside is sealed by packing. Normally, when explosive dust is collected, explosive dust particles often float around the fuselage 1 of the dust collector. There is sex. For this reason, the electrical equipment box 15 has a dust-proof structure to prevent the entry of explosive dust. Furthermore, a rain avoidance 15T is attached to the upper part of the electrical box 15, and switches and switches 15S attached to the electrical box 15 are also of a dustproof and waterproof structure.

  Fire extinguishers 16 and 17 are attached to the lower side of the filter inspection door 5 and the clean room 3, and should be inspected if a fire occurs inside the dust collector body 1 due to dust explosion. Without opening the door 5, the fire extinguishing agent suitable for the dust collection can be injected from the fire extinguishing ports 16 and 17 to perform the fire extinguishing work. Note that a plug (not shown) that always closes the digestion port is attached to the fire-extinguishing ports 16 and 17.

  Reference numeral 20 denotes a roof attached to the upper part of the clean room 3. Normally, it is desirable to install the dust collector for collecting explosive dust outdoors in consideration of safety. For this reason, the roof 20 is attached to the upper part of the dust collector, that is, the upper part of the clean room 3 (excluding the upper part of the diffusion port 4H described later) to prevent rainwater from entering the dust collector. In addition, the upper surface of the roof 20 has a slope as shown in FIG. 2 so that rainwater does not collect. Further, a soundproof material (not shown) is stretched on the inner wall of the exhaust path 20A (the path through which the clean air filtered by the filter 9 passes) inside the roof 20, which has an effect of reducing the exhaust noise.

Reference numeral 30 denotes a protective cover. The protective cover 30 holds a fixed gap 30H (see FIGS . 4 to 7) from a diffusion port 4H (see FIG. 2) of the diffusion chamber 4 to be described later, and surrounds the periphery of the diffusion port 4H. Specifically, it is attached to the back side of the clean chamber 3. When a dust explosion occurs in the airframe 1, the diffusion cover 40 (see FIG. 2) that has blocked the diffusion port 4H is opened and blast and flame are diffused to the surroundings, but the protective cover 30 is diffused. Since the surroundings of 4H are covered, the blast and flame are guided to the protective cover 30 and guided and released from the upper end 30A to the upper atmosphere, so that the surrounding safety is ensured.

  Reference numeral 31 denotes a diffusion port inspection lid, which is provided on each side surface of the protective cover 30 when viewed from the front of the machine body 1. When inspecting the periphery of the diffusion port 4H, the diffusion lid inspection lid 31 is opened to check whether the diffusion lid 40 opens and closes smoothly, or the packing between the diffusion lid 40 and the diffusion port 4H is checked. Check whether the product is deteriorated or stuck.

  FIG. 2 is a side sectional view showing the configuration of the present invention. In the dust collection chamber 2, a plurality of filters 9 and filter punching devices 7X are built in parallel, and below the filters 9. The bucket 6Z in which the explosive dust that has collected dust accumulates is stored in a freely retractable manner. In addition, a conductive coating is applied to the inside of the dust collection chamber 2 to prevent charging due to contact with explosive dust.

  As the filter 9, a filter subjected to antistatic treatment is used. As an example of the antistatic treatment, a conductor is attached or painted on a part of the surface of the filter 9, an aluminum sheet is placed inside the filter 9, or a ground wire is attached to the ground portion of the airframe 1 (illustrated). (Omitted) The charged electricity is released. The filter hammering device 7X is connected to the filter hammering handle 7. When the filter hammering handle 7 is reciprocated in the left-right direction (axial direction) with respect to the front surface, each filter hammering device 7X is also reciprocated together. In addition, the dust adhering to each filter 9 is scraped off into the bucket 6Z. The dust that has been wiped off by each filter knocking device 7X ... accumulates in the bucket 6Z, and is periodically taken out from the bucket 6Z and discarded.

  2K is a baffle plate for uniformly collecting explosive powder sucked from the suction port 8 by a plurality of filters 9 arranged in the dust collecting chamber 2, and is formed by punching metal or the like. It has been produced. In FIG. 2, the above-described diffusion chamber 4 is integrally connected to one side portion of the dust collection chamber 2 (specifically, the back side of the dust collection chamber 2) in a communicating state. A diffusion port 4H for opening the pressure at the time of dust explosion to the atmosphere is opened on the upper surface portion of the diffusion chamber 4. As shown in FIG. 2, the entire diffusion chamber 4 has a substantially inverted trapezoidal shape in which the cross-sectional area gradually increases from the lower side toward the diffusion port 4H by an inclined plate 4S that forms a steep slope. A diffusion lid 40 is attached to the diffusion port 4H.

  The inclined plate 4S prevents accumulation of explosive dust, and when a dust explosion occurs in the dust collecting chamber 2, the blast and flame are guided along the inclined plate 4S to the diffusion port 4H. Further, the inclined plate 4S improves the strength of the dust collection chamber 2 (the diffusion chamber 4 is fixed to the dust collection chamber 2 by welding and serves as a reinforcement to improve the strength of the dust collection chamber 2). At the same time, the volume of the dust collection chamber 2 is reduced, and the explosive dust, which is a dust collection material, is efficiently collected by the filters 9.

  Further, the above-described diffusion lid 40 is placed on the upper surface of the diffusion hole 4H (see FIG. 2) provided at the upper part of the diffusion chamber 4, and dust explosion occurs in the dust collection chamber 2. The blast and flame at that time are instantaneously released to the atmosphere through the upper protective cover 30 by opening the diffusion cover 40, and damage to the dust collecting chamber 2 is minimized. The detailed structure and shape will be described later with reference to FIG.

  The motor 10 described above is made in a dust explosion-proof type structure that prevents the explosion or ignition of explosive powder, and an external fan 10F is mounted on the top. The above-described fan 11 and casing 12 are made of aluminum. This is because the airflow around the fan 11 and the inside of the casing 12 are rotating at a high speed. Therefore, when the explosive powder is mixed in the clean air due to the damage of the filter 9 or the like, the fan 11 should be for some reason. This is because even when the material is damaged and contacts the casing 12 at high speed, the material is made of aluminum, so that the generation of sparks (fire types) can be minimized and the risk of dust explosion can be reduced. .

  FIG. 3 is a front sectional view showing the configuration of the present invention, and FIG. 4 is a plan view. In these drawings, 2T is a partition plate for partitioning the clean chamber 3 and the dust collection chamber 2, and the above-described filter 9 is held at the upper end side by the filter mounting plate 9X and mounted on the partition plate 2T side. Yes. A casing 12 is attached above the partition plate 2T. The motor 10 is fixed to the casing 12, and the fan 11 described above is attached to the shaft of the motor 10. Further, the above-described outer fan 10F is mounted on the motor 10, and the air sucked by the outer fan 10F is in contact with the motor 10 itself and cools the heat generated by the motor 10. do.

  As the suction path ZA for the motor cooling air, it passes through the opening 3H provided in the top plate 3F of the clean room 3 from the outside of the machine body 1 through the motor cooling air suction port 20Y of the roof 20 as shown in FIG. Thereafter, the motor 10 is cooled by being sucked by the fan outside the motor 10F.

  FIG. 5 is a plan view showing a flow of clean air discharged from the roof 20 to the outside of the machine body 1 and motor cooling air sucked from the outside of the machine body 1, and FIG. 6 is a partition chamber 20V in FIG. This shows another embodiment in which (details will be described later) is increased (the partition chamber 20V is increased in the exhaust port direction).

  Next, the passage ZB of the clean air that has been sucked from the suction port 8 and filtered by the filter 9 according to FIGS. 2, 3, and 5 will be described. The dust-containing air sucked into the dust collection chamber 2 from the opening 8 is filtered by the filter 9 to become clean air, and after passing through the ventilation hole 12R of the casing 12, the vertically long exhaust duct connected to the casing 12 After passing through the inside of 3X and passing through the duct hole 3K of the top plate 3F and finally passing through the roof 20 and over the partition wall 20G, it is discharged out of the airframe 1 from the clean air exhaust port 20E of the roof 20. The The exhaust port 20E for clean air filtered by the filters 9 is provided on the left side of the front and the front (left side of the drawing, see FIGS. 3 and 4).

  The roof 20 is provided with a roof partition plate 20S that constitutes the clean air passage path ZB. The above-described motor cooling suction path ZA is divided into routes. It has a separate structure. This is because if the filter 9 is damaged or explosive dust is mixed in the clean air due to improper installation of the filter 9 or the like, if the roof 20 does not have the partition plate 20S, the suction force of the motor external fan 10F This is because when explosive dust is sucked by the air and further enters the inside of the motor 10, the motor 10 can be prevented from being damaged, worst, or explosive. Further, the above-described partition chamber 20V is provided inside the roof 20 (on the right side when viewed from the front) so that the exhausted clean air does not enter the motor cooling air suction path ZA. In addition, a soundproof material (not shown) is attached to the inner surface of the roof 20 from which the clean air is discharged, and exhaust noise such as wind noise generated when the clean air is discharged is reduced.

FIG. 7 is a plan view in which the periphery of the mounting hinge portion (described later) of the diffusion lid 40 is enlarged, and FIG. 8 is a side view in which the periphery of the diffusion lid 40 is enlarged, and the diffusion port 4H described above. In the unlikely event that a dust explosion occurs inside the dust collector, the dust collector 4 emits energy such as a blast or flame from the discharge port 4H to prevent the dust collector body 1 from bursting. Usually, assuming a dust explosion, when the in-machine pressure rises to about 10 kPa, the diffusion cover 40 is opened, and the increase in the internal pressure of the main body 1 is suppressed. As shown in FIG. 2, the diffusion cover 40 has a flat plate shape and is inclined downward toward the gap 30 </ b> H so that rainwater does not collect on the upper part of the cover 40 . It is placed so as to close the upper surface of the protruding diffusion port 4H. During normal operation, the internal pressure of the fuselage 1 decreases due to the suction action of the fan 10, and the packing 40P attached to the lower portion of the diffusion lid 40 elastically contacts the upper edge of the diffusion port 4H by this negative pressure. The airframe 1 can be completely blocked from the outside air.

  Reference numerals 41 and 41 denote hinges attached to both sides of the diffusion chamber 4 using attachment bolts 42... So as to be positioned on both edges of the diffusion lid 40, and are provided with vertically long slots 41 </ b> A. The reason why the hole of the hinge 41 is made into a long and long hole 41A in this way is that the entire diffusion lid 40 is lifted up instantaneously by the length of the long hole 41A of the hinge 41 due to a sudden pressure rise in the aircraft when a dust explosion occurs. This is because the increased internal pressure is dissipated outside the air (atmosphere) to reduce the internal pressure in the aircraft and minimize damage to the aircraft 1. The radiation lid 40 is lifted upward by the length of the long hole 41A of the hinge 41, and then rotates around the upper end portion of the long hole 41A of the hinge 41.

  43 is an opening / closing shaft penetrating the inside of the long hole 41A of the hinge 41, and is attached to the body 1 side at both upper ends of the diffusion lid 40, and the opening / closing shaft 43 is a vertically long elongated hole 41A of the hinge 41. The diffusion lid 40 is supported to be freely opened and closed. A screw 43A is cut at one end (the end side not attached to the lid) of each opening / closing shaft 43, and a nut 44 with a locking stopper (such as a wedge nut) is tightened. This is because the opening / closing shaft 43 comes out of the long hole 41A of the hinge 41 due to breakage, deformation or the like of the hinge 41 when the diffusion cap is instantaneously opened by the powerful energy generated during a large-scale dust explosion, and the diffusion cover 40 Is to prevent it from being blown upward.

  In addition, although not illustrated, the radiation lid 40 and the airframe 1 or the radiation chamber 4 are connected by a wire rope (not shown) for preventing the radiation lid 40 from being blown upward during a dust explosion. Yes. In addition, the upper part of the diffusion lid 40 is pressed from above by fixing fasteners 50... This is for preventing air leakage at the time of backwashing and preventing the displacement of the diffusion lid 40 during the inspection of the influence of vibration during transportation and the periphery of the diffusion port 4H. Of course, the shape and the like of the fastener 50 are determined so that the fastener 50 is deformed and broken at a preset explosion pressure and the diffusion cover 40 is opened.

  The dust collector configured as described above has a structure that prevents dust explosion inside the dust collector and a structure that minimizes damage to the surroundings when an explosion occurs inside the dust collector. It is a dust collector suitable for collecting dust-containing air containing air.

  It should be noted that the present invention can also be used in a dust collector used for general dust collection applications.

DESCRIPTION OF SYMBOLS 1 Body of dust collector 2 Dust collection chamber 3 Clean room 4 Dissipation chamber 4H Radiation outlet
4S inclined plate
8 Suction port

9 Filter 10 Motor 11 Fan 20 Roof 20S Partition plate 20E Clean air exhaust port 20Y Motor cooling air suction port 30 Protective cover
30A top edge
30H Clearance 40 Radiation lid 41 Hinge 41A Long hole 43 Opening and closing shaft 44 Nut with lock

Claims (6)

The suction effect caused by the rotation of the dust collection fan, the dust sucked from the suction port to the dust collecting chamber of the internal body, and filtered through a filter provided in the dust collecting chamber, the fuselage outside from the exhaust port to clean air after filtration A dust collector configured to discharge,
An opening for opening the pressure and / or flame at the time of dust explosion to the atmosphere is opened on one side of the dust collection chamber, and the overall shape of the discharge port is lower than the lower side. An upper side of the dust collector excluding the upper part of the diffuser port, and a diffuser chamber formed in a substantially inverted trapezoidal shape with a cross-sectional area gradually increasing toward the diffuser port. The roof is covered with a roof, and a protective cover is provided around the diffuser to guide the blast diffused from the diffuser at the time of dust explosion toward the upper side of the diffuser. Between this protective cover, while providing a gap that communicates the surrounding portion of the diffusion port up and down,
The above-mentioned radiation outlet is normally closed, and when dust explosion occurs, the radiation lid that can be opened upward by the explosion pressure to open the radiation outlet descends toward the gap between the radiation outlet and the protective cover A dust collector with a blast dissipating function, characterized by being installed with an inclination . On top of the dust collecting chamber, provided with a clean room that contains the motor for rotating the dust collecting fan and the dust collecting fan inside, covers the upper surface opening of the clean room by said roof, on the roof Is provided with the exhaust port for discharging the clean air filtered by the filter according to the rotation of the dust collecting fan to the outside of the clean chamber, and the suction port for taking in the cooling air of the motor. The dust collector with a blast radiation function according to claim 1. A partition plate for partitioning the inside of the roof into an exhaust path for guiding clean air filtered by the filter to the exhaust port and a suction path for taking in motor cooling air from the suction port. The dust collector with a blast radiation function according to claim 1, wherein the dust collector is provided. The dust collection apparatus with a blast radiation function according to claim 2 , wherein the dust collection chamber and the clean room are configured to be separable from each other. Said dissipating cover for closing the dissipation port, the at least one end portion of the fastener while being temporarily fixed to the dust collecting chamber side, to the other end side projected from the control shaft, said dissipating distal end side of the control shaft The blast radiating function according to claim 1, wherein the nut is fitted into a long hole of a hinge provided in the chamber so as to be movable up and down, and a nut with a locking stopper is attached to a tip of the opening / closing shaft. Dust collector.   The dust collector with a blast radiating function according to claim 1, wherein an inspection lid is provided on a side surface of the protective cover so as to enable maintenance of the diffusion port and its peripheral portion.

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