JP2009192200A - Dust collection nozzle and industrial dust collector using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collection nozzle and an industrial dust collector using it capable of effectively removing and collecting dust even if dust is fixedly adhered to a floor face when submaterials used as reducing agents are scattered as dust in a plant, or accumulated everywhere in the plant, or the like, in the plant such as a steelmaking plant. <P>SOLUTION: The dust collection nozzle 36 for sucking and collecting dust scattered on the floor face of a plant or the like is composed such that a suction opening 37 for sucking and collecting the dust is provided at a tip of the dust collection nozzle, and a jet hole 62 jetting compressed air toward the floor face via the suction opening is provided in an interior of the suction opening of the dust collection nozzle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dust collecting nozzle for collecting dust generated in a factory such as a steel mill and an industrial dust collecting device using the same, and in particular, effectively removes dust adhered to a floor surface and collects dust. The present invention relates to a dust collecting nozzle that can be used and an industrial dust collecting apparatus using the same.

JP 2004-361003 A JP 2007-78243 A

  Conventionally, in a factory such as the above steel mill, the recovered scrap is melted in an electric furnace, and the electric furnace contains carbon (C), calcium oxide (CaO), magnesium (Mg), etc. A steel material having desired characteristics is obtained by adding an agent as an auxiliary material. At that time, the secondary raw material containing carbon (C), calcium oxide (CaO), magnesium (Mg), etc. used as the reducing agent is, for example, a factory such as a steel mill in a state where a powdery one is packed in a bag. It is carried in, is collected in a predetermined accumulation part in a state where it is taken out from the bag, and is appropriately conveyed and supplied into an electric furnace by a small crane or the like.

  At that time, the auxiliary raw material containing carbon (C), calcium oxide (CaO), magnesium (Mg), etc. used as the reducing agent is in a fine powder state, and therefore scatters around when being taken out of the bag. It tends to soar as dust, and easily accumulates as dust everywhere in a factory such as a steel mill.

  Therefore, in factories such as the above-mentioned steelworks, in order to collect the auxiliary materials that are scattered around the predetermined accumulation part or accumulated as dust everywhere in the factories such as steelworks, and supply it to the electric furnace Industrial dust collectors are used.

  As the industrial dust collector, a dust collector at the time of scrap charging in an electric furnace for steelmaking disclosed in Japanese Patent Application Laid-Open No. 2004-361003 has already been proposed, although the object to be collected is different. Has been.

  As such an industrial dust collector, a suction hose is connected to a dust collecting hopper sucked to a negative pressure by a suction device, and the dust collecting nozzle attached to the tip of the suction hose collects in the factory. What is configured to collect dust as an auxiliary material scattered and deposited around the part or throughout the factory is used. The dust collected by the industrial dust collector is taken out from the dust collecting hopper and packed in a bag. The dust packed in the bag is collected in a stacking unit in the factory, and the dust is collected by a small crane or the like. It is used as a reducing agent by transporting to a furnace and supplying the collected dust into an electric furnace.

  Further, in the industrial dust collector, when the dust collection operation is completed, the suction device that sucks the inside of the dust collection hopper to a negative pressure is stopped. When the suction device is stopped, the dust collection hopper is The suction device when the valve for taking in outside air provided is opened manually to return the inside of the dust collection hopper to atmospheric pressure, and the suction device is stopped while the pressure inside the dust collection hopper is negative. It is intended to prevent damage and failure due to reverse rotation.

  However, since the conventional industrial dust collector has only a function of collecting dust in a factory or the like, in order to reuse the collected dust in an electric furnace or the like, it is necessary to pack it once. Yes, the dust packed in the bag needs to be once accumulated in the accumulation section in the factory and then supplied to the electric furnace. For this reason, the above-mentioned conventional industrial dust device recycles the collected dust, such as bagging, collecting the packed dust in the stacking unit, and further collecting the dust collected in the stacking unit. In other words, a large number of processes are required, such as an operation of supplying the battery again, and the workability is poor. Further, in the conventional industrial dust collector, when dust collected by the industrial dust collector is once packed in a bag, and the dust packed in the bag is collected in the stacking unit, the dust is also scattered around. In addition, it has a problem that it easily rises as dust, easily accumulates as dust everywhere in a factory such as a steel mill, and the recycling efficiency of the collected reducing agent is poor.

  Therefore, in order to solve such a problem, the dust collected by the industrial dust collector is not packed in a bag, but is put into a blowing device that sends the dust to an electric furnace by air pressure. A configuration in which dust is conveyed to the furnace by air pressure has already been proposed and has already been implemented.

  However, the conventional technique has the following problems. That is, in the case of the above-mentioned conventional industrial dust collector, it is necessary to put dust collected by the industrial dust collector into the blowing device, and the dust is composed of fine particles and the like. It was easy to scatter, and even when this dust was put into the blowing device, it had to be relied on manually, and there was a problem that workability was poor.

  In addition, in the case of the above-mentioned conventional industrial dust collector, it is necessary to put the dust collected by the industrial dust collector into the blowing device, and the dust is composed of fine particles etc. There is also a problem that an operator who easily scatters and puts the dust into the blowing device easily sucks the dust and needs to take sufficient dust-proof measures.

  Accordingly, the present applicant has solved the above-mentioned problems of the prior art, and in the factories such as steel mills, the auxiliary material used as a reducing agent is scattered as dust in the factories, and everywhere in the factories. In addition to being able to efficiently collect this dust when it accumulates on the surface, it is possible to automatically supply the collected dust to a desired supply part such as an electric furnace. In order to provide an industrial dust device that greatly improves the safety to the human body, the one disclosed in Japanese Patent Application Laid-Open No. 2007-78243 has already been proposed.

  However, the conventional technique has the following problems. In other words, in the case of the above-mentioned conventional industrial dust collector, oil is mixed in dust as an auxiliary material scattered and deposited around the accumulation part in the factory or everywhere in the factory as a cleaning object. When the water is moistened, the viscosity becomes high, and when it is further solidified, if it sticks to the floor of the factory, it cannot be easily removed by simply sucking it with the dust collecting nozzle. It was.

  In order to solve this problem, the dust as an auxiliary material, which is mixed with oil or becomes highly moistened and becomes highly viscous, is further stepped down and fixed to the floor of the factory, is connected to a compressor or the like. It is conceivable to excavate by blowing medium-pressure air as compressed air through a hose.

  However, in this case, medium-pressure air as compressed air blown through a hose connected to a compressor, etc., winds up the surrounding air and generates dust in the entire factory. It had a new problem of adversely affecting equipment.

  In addition, the operation of blowing compressed air through a hose connected to a compressor or the like needs to be performed separately from the dust collection operation, and there is a problem that workability is lowered.

  Furthermore, in the case of the above-mentioned conventional industrial dust collector, if the forgetting to open the valve for taking in outside air is stopped at the end of the dust collection work and the suction device is stopped, the suction device will reverse and cause damage or failure. It also had the problem that it occurred.

  In the case of the conventional industrial dust collector, when a large amount of dust is circulated in the dust collection hopper, the dust in the dust collection hopper is pressurized by the weight, and the dust collection hopper Further, there is a problem that it becomes difficult to take out the collected dust due to being fixed to the inner wall of the steel.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to use an auxiliary material used as a reducing agent or the like in a factory such as a steel mill. Dust collection nozzle that can effectively remove and collect dust even when the dust adheres to the floor surface, such as when scattered in the factory or accumulated everywhere in the factory And it is providing the industrial dust device using the same.

  Another object of the present invention is to provide an industrial dust device capable of preventing the suction device from being damaged or failing when the dust collection operation is completed in combination with the above object.

  Another object of the present invention is to provide an industrial dust device capable of easily taking out dust collected in a dust collection hopper in combination with the above object.

In order to solve the above problems, the invention described in claim 1 is a dust collection nozzle for sucking and collecting dust scattered on a floor surface of a factory or the like.
A suction opening for sucking and collecting dust is provided at the tip of the dust collection nozzle, and the suction opening of the dust collection nozzle is provided with the suction opening. This is a dust collection nozzle, characterized in that it has an injection port for injecting compressed air toward the floor surface through the opening.

Further, the invention described in claim 2 is an industrial dust collector for sucking and collecting dust scattered on a floor surface of a factory or the like.
A dust collection tank whose inside is kept at a negative pressure by suction means;
A dust collection nozzle connected to the dust collection tank via a suction tubular member;
A suction opening for sucking and collecting dust is provided at the tip of the dust collection nozzle, and the suction opening of the dust collection nozzle is provided with the suction opening. An industrial dust collector characterized in that an injection port is provided for injecting compressed air toward the floor surface through the opening.

  Further, in the invention described in claim 3, the dust collecting nozzle has a valve mechanism for taking in outside air that opens and takes in outside air when the pressure in the dust collecting nozzle becomes a predetermined value or more. The industrial dust collector according to claim 2, wherein the industrial dust collector is provided.

  Further, in the invention described in claim 4, prior to the stop operation of the suction means, when operating the stop means for stopping the suction means when the dust collection work is finished in the dust collection tank, The industrial dust collector according to claim 2 or 3, further comprising an automatic valve for returning the inside of the dust collecting tank to atmospheric pressure by communicating with the outside.

  According to the present invention, in a factory such as a steel mill, when the auxiliary material used as a reducing agent is scattered in the factory as dust or deposited everywhere in the factory, the dust is generated on the floor surface. It is possible to provide a dust collection nozzle that can be effectively removed and collected even when firmly attached to the dust, and an industrial dust device using the same.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
2 to 4 are configuration diagrams respectively showing an industrial dust collecting apparatus to which the dust collecting nozzle according to Embodiment 1 of the present invention is applied.

  As shown in FIGS. 2 to 4, the industrial dust collector 1 includes a frame body 2 formed as a vertically long rectangular frame, and the frame body 2 is roughly divided into about It is composed of a stand frame 3 occupying 2/3 and a top frame 4 occupying about 1/3 of the upper part. As shown in FIGS. 5 to 7, the stand frame 3 includes four support frames 5, a beam frame 6 stretched in the horizontal direction that connects the four support frames 5 to each other, and a support frame 5. And a reinforcing frame 7 that obliquely connects the beam frame 6 to each other. In addition, a disk-shaped base plate 8 is fixed to the lower ends of the four column frames 5 by welding or the like.

  The top frame 4 is composed of four support frames 9 and a beam frame 10 stretched horizontally on the upper ends of the four support frames 9. As shown in FIG. 6, a substantially triangular upper flange 11 is fixed to the upper end of the upper flange 11, and a crane (not shown) is connected to the upper flange 11 via a wire 12 as shown in FIG. 5. A lifting plate 13 for lifting is fixed by welding or the like.

  Further, in the industrial dust collector 1, as shown in FIGS. 2 to 4, a dust collecting hopper 15 as a dust collecting tank is disposed at the upper portion of the stand frame 3, and at the lower portion thereof. The blowing tank 16 of the blowing means is arranged. The dust collecting hopper 15 has an upper part 17 formed in a rectangular parallelepiped shape having a plane square, and a lower part 18 formed in a substantially quadrangular pyramid shape with a narrowed lower end part. Note that the height of the upper portion 17 of the dust collection hopper 15 is set as appropriate in order to satisfy the volume required for the dust collection hopper 15.

  As shown in FIG. 8, the lower portion 18 of the dust collecting hopper 15 is formed symmetrically so that the frontal shapes of the side walls 19 and 20 located on the left and right sides thereof have an opening angle of about 70 degrees. As shown in FIG. 2, the side walls 21 and 22 positioned before and after the front side wall 21 and 22 have a steep slope with the inclination angle of the front side surface 21 being 44 degrees and the inclination angle of the rear side face 22 being 24 degrees. It is formed in an asymmetric shape. The inside of the dust collection hopper 15 is formed in an airtight manner, and can be kept at a negative pressure by sucking the air inside by a suction means, as will be described later.

  Further, as shown in FIG. 2, the industrial dust device 1 is equipped with a suction device 23 as suction means for making the inside of the dust collecting hopper 15 negative pressure as shown in FIG. For example, the suction device 23 is disposed at a position corresponding to the top frame 4. The suction device 23 includes a suction pump 24 including a vacuum pump and a drive motor 25 that rotationally drives the suction pump 24. As the suction pump 24, for example, a pump having a suction air volume of 4.2 m @ 3 / min and a suction pressure of -49 kpa is used.

  As shown in FIG. 2, the suction port 26 of the suction pump 24 is connected to a filter 28 made of a bag film or the like via a suction pipe 27. The filter 28 includes a backwashing electromagnetic valve 29 and an air tank. A dust collecting hopper 15 is connected to the inside of the dust collecting hopper 15. Further, the discharge port 31 of the suction pump 24 is configured to exhaust outside via a special silencer 32 as shown in FIGS. 3 and 4.

  In addition, as shown in FIG. 8, the dust collection hopper 15 includes, for example, a suction pipe 35a as a suction tubular member from a suction port 34 formed in the side wall 33a of the dust collection hopper 15. In addition, a dust collecting nozzle 36 is connected through a long suction hose 35 as a tubular member for suction.

  By the way, in this embodiment, a suction opening for sucking and collecting dust is provided at the tip of the dust collection nozzle, and the suction opening of the dust collection nozzle is provided. Is provided with an injection port for injecting compressed air toward the floor surface through the suction opening.

  That is, the dust collecting nozzle 36 is connected to the tip of the suction hose 35 and is attached to the tip of the cleaning handling pipe 60 that also serves as a gripping member that the worker grips when performing a cleaning operation. As the cleaning handling pipe 60, for example, a SUS pipe having a diameter of 50 mm and a length of 1000 mm is used. The cleaning handling pipe 60 is connected to the dust collection hopper 15 via the suction hose 35 and is sucked by the dust collection hopper 15 at a pressure (negative pressure) of about −80 kPa.

  The dust collecting nozzle 36 is formed of metal such as SUS, like the cleaning handling pipe 60, and is formed in a tapered shape so as to spread in a fan shape toward the tip. Note that a small taper is also provided in the height direction of the dust collecting nozzle 36 so that the tip is narrowed. In addition, as shown in FIG. 1, the tip of the dust collecting nozzle 36 is a suction rectangle formed in an elongated rectangular shape having a relatively long opening width in a direction parallel to the floor surface and a short height direction. An opening 37 is formed, and the opening surface 61 at the tip of the suction opening 37 has a predetermined angle θ with respect to the horizontal plane when the dust collection nozzle 36 is held horizontally as shown in FIG. It is set to tilt only. Therefore, when the dust collecting nozzle 36 is used in a state where it is inclined at a predetermined angle with respect to the floor surface, the opening surface 61 at the tip of the suction opening 37 is substantially parallel to the floor surface or with respect to the floor surface. It is set to incline at a small angle so that dust can be collected efficiently.

  Further, an injection port (jet injection nozzle) 62 for injecting compressed air toward the floor surface through the suction opening 37 is provided inside the dust collection nozzle 36. The injection port 62 is attached to the upper end surface 36 a of the dust collection nozzle 36 by means such as welding so as to penetrate the upper end surface of the dust collection nozzle 36. The injection port 62 is formed of a metal short and small-diameter annular member, and the injection port 62 is compressed on the floor surface of the factory through the suction opening 37 of the dust collection nozzle 36. It is configured to inject air directly. As shown in FIG. 12, the injection port 62 is provided at the center of the opening 37 that is set relatively long in a direction parallel to the floor surface, and the compressed air injected from the injection port 62 , And is configured to prevent leakage from the opening 37 to the outside. Further, as shown in FIG. 12, the injection angle of the injection port 62 is set to be inclined by 45 degrees with respect to the horizontal plane when the dust collection nozzle 36 is held horizontally. Therefore, the dust collection nozzle 36 can be used in a state where it is inclined at 45 degrees with respect to the floor surface, so that compressed air can be jetted from the jet port 62 to the floor surface of the factory substantially perpendicularly. It has become. Note that, at the tip of the dust collecting nozzle 36, a notch 36a is provided at the corner.

  A high pressure air tube 64 disposed in parallel with the cleaning handling pipe 60 is connected to an end portion exposed from the upper end surface of the dust collecting nozzle 36 of the injection port 62 through a joint 63 curved at 45 degrees. While being connected, a high-pressure air tube 66 having a diameter of 10 mm is connected to the base end portion of the high-pressure air tube 64 via an opening / closing valve 65. The high pressure air tube 66 is supplied with high pressure compressed air of about 930 kpa, for example, from a compressor (not shown). When it is not necessary to inject compressed air from the injection port 62, only the normal suction operation can be performed by closing the open / close valve 65.

  The amount of high-pressure compressed air supplied from the compressor is set to about 240 L / min per minute at a pressure of about 930 kpa, for example. On the other hand, the amount of air sucked from the dust collecting nozzle 36 is, for example, a pressure of about −80 kpa, which is 9,000 L / min per minute, which is much larger than the amount of compressed air. Is set. Therefore, the influence on the cleaning efficiency sucked from the dust collecting nozzle 36 by injecting the compressed air from the injection port 62 as described above is {(9000−240) / 9000} × 100 = 97.3%. Is so small that it can be ignored.

  Further, as shown in FIGS. 12 and 13, a valve mechanism 67 for taking in outside air is provided on the upper end surface of the dust collecting nozzle 36. When a large amount of dust is simultaneously sucked by the dust collection nozzle 36, the suction opening 37 of the dust collection nozzle 36 is temporarily blocked by dust, and the cleaning handling pipe 60 or suction The flow rate of the air flowing through the hose 35 becomes almost zero, and the sucked dust accumulates in the reducing portion where the pipe diameter of the cleaning handling pipe 60 and the suction hose 35 becomes small, causing clogging. Thereafter, even if the suction opening 37 of the dust collection nozzle 36 is taken out of the dust, the suction pipe 37 and the suction hose 35 may be clogged without the air suction being resumed. .

  Therefore, in this embodiment, a valve mechanism 67 for taking in outside air is provided on the upper end surface of the dust collecting nozzle 36, and when the cleaning handling pipe 60 and the suction hose 35 are likely to be clogged, When the pressure in the dust collection nozzle 36 becomes higher than a predetermined value, the outside air intake valve mechanism 67 is opened and the outside air is taken into the dust collection nozzle 36 so that the inside of the cleaning handling pipe or the suction hose 35 is filled. The flow rate of the air flowing through the pipe is prevented from becoming almost zero, and the cleaning handling pipe and the suction hose 35 are prevented from being clogged.

  As shown in FIG. 13, the outside air intake valve mechanism 67 opens and closes the outside air intake opening 68 opened at the upper end surface of the dust collecting nozzle 36, and the outside air intake opening 68. A flat valve element 69 is provided on the back side of the upper end surface of the dust collecting nozzle 36 by screws 70 or the like. The flat valve body 69 is made of, for example, a thin metal plate made of stainless steel or the like having a predetermined spring constant. The flat valve body 69 extends in the longitudinal direction as shown in FIG. Are attached to the back side of the upper end surface of the dust collecting nozzle 36 by two screws by a tap plate 72 through two elongated holes 71 formed in parallel.

  Then, as shown in FIG. 14, the flat valve body 69 has a screw 70 positioned so that a predetermined deformation (amount of deflection) is obtained by pressing a predetermined position with a predetermined load. When the pressure in the dust collecting nozzle 36 is adjusted and becomes higher than a predetermined value, it is opened.

  Furthermore, as shown in FIGS. 2, 4, and 8, the blowing tank 41 of the blowing device 16 is connected to the inside of the dust collecting hopper 15 through the communication portion 40 at the lower end of the dust collecting hopper 15. And in communication with each other via a communication port 42. Further, as shown in FIG. 10, a disk-shaped valve plate 43 for opening and closing the communication port 42 is disposed at the communication port 42 so as to be opened and closed. As shown in FIG. 2, the valve plate 43 is opened and closed by a discharge valve 44 attached to the blowing tank 41.

  As shown in FIG. 8, the upper part 45 of the blowing tank 41 is formed in a cylindrical shape, and the lower part 46 is formed thinly in a substantially conical shape downward. A porous plate 47 made of sintered metal, punching metal or the like is provided in the vicinity of the bottom in the blowing tank 41, and pressurized air is supplied to the lower portion of the porous plate 47 from a compressor (not shown). A pipe 48 (see FIG. 2) for supplying pressurized air is connected. In addition, the lower part 46 of the blowing tank 41 is provided with an outside air introduction port 49 for introducing external air into the blowing tank 41 when the inside of the blowing tank 41 is washed at the bottom thereof. The outside air introduction port 49 is normally closed by an opening / closing valve 50 as shown in FIG. In addition, as the compressor, for example, a compressor arranged in advance in a factory is connected and used via a hose. However, the compressor may be configured to be mounted on the industrial dust device 1.

  Further, as shown in FIG. 2, a level meter 51a for detecting the upper limit level is attached to the upper portion 45 of the blowing tank 41, and a level meter 51b for detecting the lower limit level is attached to the lower portion 46 thereof. The height of the dust 100 in the blowing tank 41 can be measured. Moreover, the lower part 46 of this blowing tank 41 has the blowing port 52 which supplies the dust accommodated in the blowing tank 41 to to-be-supplied parts, such as an electric furnace which is not shown in figure, on the side surface by air pressure. The blowing port 52 is configured to be opened and closed by a discharge valve 53. In addition, the part 52a located in the blowing tank 41 of the said blowing port 52 is arrange | positioned so that the upper part of the perforated plate 47 may be opposed, and the dust 100 is reliably blown in with the pressurized air which passes the said perforated plate 47. It is possible to blow into the mouth 52.

  2 and 4, 55 indicates an electric control / operation panel, and 56 indicates a piping system 2 that drives a desired valve or the like to open and close by air pressure.

  Furthermore, in this embodiment, as shown in FIG. 15 and FIG. 16, when the dust collected in the dust collection hopper 15 is solidified and it is difficult to take out from the dust collection hopper 15. By sending compressed air to the inner surface of the dust collection hopper 15 as a dust collection tank, it is possible to smoothly discharge the dust solidified inside the dust collection hopper 15.

  As shown in FIG. 2, the lower portion 18 of the dust collecting hopper 15 has both side walls 21 and 22 positioned at the front and rear sides thereof, the inclination angle of the front side surface 21 is 44 degrees, and the rear side surface. It is formed in an asymmetrical shape so that the inclination angle of 22 becomes a steep slope of 24 degrees so as to prevent dust collected between the opposite side walls 21 and 22 from accumulating in an arch shape and solidifying. It is configured.

  However, since the lower part 18 of the dust collection hopper 15 is formed in a quadrangular pyramid shape, the dust collected on the inner surface of the dust collection hopper 15 is solidified as compared with the case where it is formed in a conical shape. Easy to adhere.

  Therefore, in this embodiment, as shown in FIGS. 15 and 16, in the lower portion 18 of the dust collecting hopper 15, the corner plate 73 having a narrow width that closes the corners of the four corners in a substantially triangular shape is provided at the four corners. The corner plate 73 and the dust collection hopper are formed by means such as welding along the longitudinal direction so that the collected dust is difficult to solidify at the corner portion of the lower portion 18 of the dust collection hopper 15. 15 to the space 74 formed between the lower portion 18 and the inner surface of the lower portion 18 by sending compressed air from a nozzle 75 at the upper end of the space 74 at a predetermined timing. The dust accumulated in the lower portion 18 of the dust collecting hopper 15 is effectively dropped by the air slider action by the compressed air injected toward the lower portion 18 of the 15. It is configured. In addition, since the corner | angular part of the said hopper 15 for dust collection touches especially two side surfaces, there exists a possibility that the collect | recovered dust may adhere and solidify.

  In addition to sending compressed air from the upper end of the space formed between the corner plate and the inner surface of the lower portion 18 of the dust collecting hopper 15, as shown in FIG. You may comprise so that it may send from the lower end part vicinity of the plate 73. FIG.

  Further, as shown in FIG. 15, a manual valve 77 and a pipe 78 are provided from a compressor 76 to a space 74 having a substantially triangular cross section formed between the corner plate 73 and the inner surface of the lower portion 18 of the dust collecting hopper 15. Compressed air is supplied through

  The corner plate 73 is provided up to about 2/3 of the lower portion 18 of the dust collecting hopper 15 as shown in FIG.

  Further, in this embodiment, as shown in FIG. 2, the suction control pump 55 is operated by operating the electric control / operation panel 55 when the industrial dust collector 1 is used to finish the cleaning of the floor surface of a factory or the like. The drive motor 25 that rotates the drive 24 is stopped.

  However, in this case, when the electric control / operation panel 55 is operated to operate a button for stopping the drive motor 25 that rotationally drives the suction pump 24, the upper end of the dust collecting hopper 15 is moved as shown in FIG. The automatic valve 80 provided in the section is first opened through the piping system 56 that is driven to open and close by air pressure, and is returned to the atmospheric pressure in the dust collecting hopper 15, and then provided in the electric control / operation panel 55. The drive motor 25 is stopped through a timer circuit that is delayed by a predetermined time.

  In the above configuration, in the case of the industrial dust device according to this embodiment, the auxiliary material used as a reducing agent or the like in a factory such as a steel mill is as dust in the factory as follows. When the dust is scattered or accumulated everywhere in the factory, this dust can be collected efficiently, and the collected dust is automatically applied to the desired supply part such as an electric furnace. Thus, the workability and the safety to the human body can be greatly improved.

  Further, in the case of the industrial dust device according to this embodiment, the auxiliary material used as a reducing agent or the like in the factory such as a steel mill is scattered as dust in the factory as follows. Even when the dust adheres to the floor surface, such as when it is deposited everywhere in the factory, it can be effectively removed and collected.

  Furthermore, in the case of the industrial dust device according to this embodiment, it is possible to prevent the suction device from being damaged or broken when the dust collection work is finished as follows. Yes.

  Further, in the case of the industrial dust device according to this embodiment, it is possible to easily take out the main dust in the dust collecting hopper as follows.

  That is, in the case of the industrial dust apparatus 1 according to this embodiment, as shown in FIG. 2, the operator operates the electric control / operation panel 55 to operate the suction pump 24, as shown in FIG. As described above, the dust 100 scattered or deposited on the floor surface in a factory such as a steel mill is sucked from the dust collecting nozzle 36 via the suction hose 35 and collected in the dust collecting hopper 15. It is like that. At that time, the communication port 42 provided between the dust collection hopper 15 and the blowing tank 41 is closed by the valve plate 43 by operating the discharge valve 44.

  By doing so, the dust 100 scattered or deposited on the floor surface in a factory such as a steel mill is collected and stored in the dust collection hopper 15. The dust 100 is made of an auxiliary material containing, for example, carbon (C), calcium oxide (CaO), magnesium (Mg), or the like used as a reducing agent.

  At that time, when using the industrial dust collector, oil is mixed into the dust as an auxiliary material scattered and deposited around the accumulation part in the factory and everywhere in the factory as the object to be cleaned. However, if the water is moistened and becomes highly viscous, and further solidified on the floor of the factory, it may not be easily removed by simply sucking it with the dust collecting nozzle.

  In this case, as shown in FIG. 1, the compressor (not shown) is started, and the open / close valve 65 of the high pressure air tube 64 disposed in parallel with the cleaning handling pipe 60 of the dust collecting nozzle 36 is opened. By spraying high-pressure air from the injection port 62 provided in the dust collection nozzle 36 onto the floor of the factory, etc., dust adhered to the floor of the factory by the pressure of the high-pressure air can be easily removed, At the same time, the dust separated from the floor of the factory is sucked by the dust collecting nozzle 36 and can be removed without being scattered around.

  The injection of high-pressure air from the injection port 62 is performed while suctioning from the dust collection nozzle 36, so that the high-pressure air is prevented from leaking outside from the dust collection nozzle 36 and winding up the surrounding dust. it can.

  Next, in the case of the industrial dust device 1, when the dust collection process is completed, the suction pump 24 is stopped by stopping the drive motor, and then between the dust collection hopper 15 and the blowing tank 41. The provided communication port 42 is opened by the valve plate 43 by operating the discharge valve 44 for a predetermined time.

  At this time, when the electric control / operation panel 55 is operated to operate the button for stopping the drive motor 25 that rotationally drives the suction pump 24, the upper end of the dust collecting hopper 15 is provided as shown in FIG. After the automatic valve 80 is opened first through a piping system 56 that is driven to open and close by air pressure, the dust collecting hopper 15 is returned to atmospheric pressure, and then a timer circuit provided in the electric control / operation panel 55 The drive motor 25 is stopped through a state after being delayed by a predetermined time.

  Therefore, in the case of the industrial dust device 1, when the dust collection step is finished, there is no possibility of stopping the suction pump 24 by stopping the drive motor while the inside of the dust collection hopper 15 remains negative. When the dust collection work is finished, it is possible to prevent the suction device from being damaged or broken.

  Then, as shown in FIG. 2, the dust 100 collected in the dust collection hopper 15 falls into the blowing tank 41 by its own weight, but the dust 100 in the dust collection hopper 15 has its own weight. If the drop does not drop sufficiently, the inside of the blowing tank 41 may be set to a negative pressure by a hose. A predetermined amount of dust 100 is accommodated in the blowing tank 41. At that time, the amount of the dust 100 in the blowing tank 41 is detected by the level meters 51a and 51b.

  Also, if the dust 100 in the dust collection hopper 15 does not fall sufficiently due to its own weight, the inside of the blowing tank 41 is not made negative by a hose, as shown in FIGS. 15 and 16. Dust is collected from the lower end of the corner plate by sending compressed air from the upper end of the dust collecting hopper 15 to the space formed between the inner surface of the lower portion 18 of the dust collecting hopper 15 and the corner plate at a predetermined timing. The dust accumulated in the lower portion 18 of the dust collection hopper 15 can be effectively dropped by the air slider action by the compressed air injected toward the lower portion 18 of the hopper 15 for use.

  Therefore, in the case of the industrial dust device according to this embodiment, it is possible to easily take out dust that has been rotated into the dust collection hopper.

  Thereafter, the communication port 42 provided between the dust collection hopper 15 and the blowing tank 41 is closed by the valve plate 43 by operating the discharge valve 44. In this state, this time, the operator operates the electric control / operation panel 55 to operate the compressor (not shown), and as shown in FIG. 11, the compressed air is supplied to the bottom of the blowing tank 41 by the compressor. The dust 100 supplied from the supply pipe 48 and accommodated in the blowing tank 41 is supplied from the blowing port 52 by the pressurized air supplied through the perforated plate 47. The dust supplied from the blowing port 52 is supplied into an electric furnace for steelmaking (not shown) via a supply hose connected to the blowing port 52, and the dust 100 is used as a secondary agent as a reducing agent. It is used as a raw material.

  Thus, in the case of the industrial dust device 1 according to the above-described embodiment, the dust tank 100 that collects the dust 100 collected inside the dust collection hopper 15 is disposed below the dust collection hopper 15. After being accommodated in 41, it can be automatically supplied from the blowing tank 41 to the electric furnace for steelmaking (not shown) through a supply hose by pressurized air, and in a factory such as a steel mill. Of course, when the auxiliary material used as a reducing agent is scattered as dust 100 in the factory or accumulated everywhere in the factory, the dust 100 can be collected efficiently. In other words, the collected dust 100 can be automatically supplied to a desired supply part such as an electric furnace, and workability and safety to the human body can be greatly improved.

  In addition, as shown in FIG. 17, the industrial dust device 1 can be moved to an arbitrary place by being suspended by a crane K via a wire attached to the upper end portion of the frame body 2. It is also possible to perform dust collection work at high places in factories such as steelworks.

1A and 1B are a plan view and a side view showing a dust collection nozzle of an industrial dust collection apparatus according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the industrial dust collector according to Embodiment 1 of the present invention. FIG. 3 is a plan view showing an industrial dust collector according to Embodiment 1 of the present invention. FIG. 4 is a side view showing the industrial dust collector according to Embodiment 1 of the present invention. FIG. 5 is a front view showing a frame body of the industrial dust collector according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing a frame body of the industrial dust collector according to Embodiment 1 of the present invention. FIG. 7 is a side view showing the frame body of the industrial dust collector according to Embodiment 1 of the present invention. FIG. 8 is a front view showing a dust collection hopper and a blowing tank of the industrial dust collector according to Embodiment 1 of the present invention. FIG. 9 is an explanatory view showing a usage state of the industrial dust collector according to Embodiment 1 of the present invention. FIG. 10 is a configuration diagram showing an opening / closing mechanism of the communication portion. FIG. 11 is an explanatory view showing a usage state of the industrial dust collector according to Embodiment 1 of the present invention. 12 (a) to 12 (c) are a plan view, a partially broken front view, and a side view showing the dust collection nozzle of the industrial dust collector according to Embodiment 1 of the present invention. FIGS. 13A to 13C are an enlarged plan view, a longitudinal sectional view, and a sectional view taken along line AA showing the dust collecting nozzle of the industrial dust collecting apparatus according to Embodiment 1 of the present invention. FIGS. 14A to 14C are component diagrams showing components of the valve mechanism. FIGS. 15A to 15D are configuration diagrams showing the dust collection hopper, respectively. FIGS. 16 (a) and 16 (b) are configuration diagrams respectively showing main parts of the dust collection hopper. FIG. 17 is a perspective explanatory view showing a state in which the industrial dust collector according to Embodiment 1 of the present invention is lifted.

Explanation of symbols

  1: Industrial dust collector, 2: Frame body, 15: Dust collecting hopper (dust collecting tank), 23: Suction device, 36: Dust collecting nozzle, 37: Suction opening, 62: Injection port.

Claims (4)

In a dust collection nozzle for sucking and collecting dust scattered on the floor of a factory, etc.
A suction opening for sucking and collecting dust is provided at the tip of the dust collection nozzle, and the suction opening of the dust collection nozzle is provided with the suction opening. A dust collecting nozzle, characterized in that an injection port is provided for injecting compressed air toward the floor surface through the opening. In industrial dust collectors for sucking and collecting dust scattered on the floor of factories, etc.
A dust collection tank whose inside is kept at a negative pressure by suction means;
A dust collection nozzle connected to the dust collection tank via a suction tubular member;
A suction opening for sucking and collecting dust is provided at the tip of the dust collection nozzle, and the suction opening of the dust collection nozzle is provided with the suction opening. An industrial dust collector characterized by comprising an injection port for injecting compressed air toward the floor surface through the opening. 3. The dust collection nozzle is provided with a valve mechanism for taking in outside air that is opened to take in outside air when the pressure in the dust collection nozzle becomes a predetermined value or more. Industrial dust collector described in 1. When the dust collection tank is operated with a stop means for stopping the suction means when finishing the dust collection work, the inside of the dust collection tank is communicated with the outside prior to the stop operation of the suction means. The industrial dust collector according to claim 2 or 3, wherein an automatic valve for returning to atmospheric pressure is provided.

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