JPH0554531U - Pressure tank type powder and granular material cutting device - Google Patents

Abstract

(57) [Summary] [Purpose] A pressurized tank of this type that can be replenished quickly with a relatively simple structure, without discharging dust to the outside, and pressing noises smoothly. An object is to provide a die / powder cutting device. [Structure] A cutout device is built in the lower part of a pressure-resistant tank, a charging port having an opening / closing valve and an exhaust pipe having an exhaust valve beside it are provided at the upper part of the tank, and a guide hopper is provided above the charging port. This is a pressurized tank type granular material cutting device of a different type, which defines a ring-shaped processing chamber with a bottom with a built-in filter on the outer periphery of the guide hopper, connects the lower part of the processing chamber to an exhaust pipe, and exhausts it. The pipe is provided with an ejector portion that guides air in the downstream direction of the exhaust pipe.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a pressure tank type powder / grain cutting device.

[0002]

[Prior art and its technical problem]

 Metal refining facilities Use pressure tanks as a means of blowing powdered materials such as carburizing agents, decarburizing agents, deoxidizing agents, and slag forming agents into molten metal such as melting furnaces, hot metal furnaces, ladles, converters, etc. However, it is well known that a ceiling is provided with an inlet and a lower part is provided with a cutting mechanism and an outlet. In such a pressure tank type particle cutting device, powder particles are filled in a tank, quantitatively cut by a cutting mechanism that also uses compressed air, and conveyed by air flow to a target location by a hose or the like. Therefore, it is necessary to replenish the powder / granular material from the input port every time the powder / granular substance in the tank reaches a certain remaining amount. Therefore, conventionally, the tank is provided with a hopper leading to the input port. A cone-type or butterfly-type on-off valve is installed in the mouth, and an exhaust valve for adjusting the pressure in the tank is installed on the side of the inlet. The granules are placed in a sturdy cloth bag, which is generally called a container bag, and when they are loaded, they are carried to a hopper by a crane, etc., and when the exhaust valve is opened and the internal pressure of the tank becomes atmospheric pressure, the lower end of the container bag is opened and closed. The method is to open the lid and let it fall freely into the tank.

However, at the time of this charging, the space volume in the tank is reduced due to the flow and accumulation of the powder and granules. Of course, at the time of this injection, the exhaust valve is opened to exhaust the air in the tank, but the speed of decrease of the space volume of the tank due to the particles flowing down from the injection port with a large opening area Exhaust of air from the pipe will not be in time. Especially when a filter is attached to the exhaust pipe, the exhaust efficiency will be reduced, which is even more so. As a result, the pressure inside the tank becomes higher than atmospheric pressure, and the falling condition of the powder and particulate matter deteriorates with the progress of the charging. The phenomenon of plunging outward is repeated intermittently. In addition, dust is generated in the tank due to the impact of charging, and it is discharged from the exhaust pipe. As a result, a large amount of dust is generated and scattered around, causing a serious problem that the working environment is extremely deteriorated and the health of workers is impaired. In addition, since the pressurized air is directly discharged from the exhaust pipe, a great noise is generated, which is also a serious problem in terms of working environment.

[0004]

[Means for Solving the Problems]

 The present invention was devised to solve the above-mentioned problems, and its purpose is to make it possible to replenish powder particles promptly and to release dust to the outside with a relatively simple structure. It is another object of the present invention to provide a pressurized tank type powder and granular material cutting device of this type, which can suppress noise and perform smooth operation. In order to achieve the above-mentioned object, the present invention has a cut-out device at the bottom of a pressure-resistant tank, and an inlet having an opening / closing valve and an exhaust pipe having an exhaust valve on the side of the inlet at the top of the tank. In a pressurized tank type granular material cutting device of a type in which a guide hopper is provided above the mouth, a ring-shaped processing chamber with a bottom is built around the outer circumference of the guide hopper to define the processing chamber of the bottom. The lower part is connected to the exhaust pipe, and the exhaust pipe is provided with an ejector part that guides air in the downstream direction of the exhaust pipe. Another object of the present invention is to provide, in addition to the above, a pressurized tank type powder / particle cutting device of this kind, which can collect the dust accompanying the charging of the powder / grain and automatically return it to the tank. Especially. In order to achieve this object, the present invention is one in which the lower part of the processing chamber is configured to be inclined downward, and the lower end part thereof is connected to the upper part of the tank via a recovery valve. INDUSTRIAL APPLICABILITY The present invention can be used for an auxiliary raw material blowing machine for metal refining, a furnace material spraying machine for spraying and repairing an irregular shaped furnace material on a damaged portion, a mortar or concrete spraying machine, and the like.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show an example of a pressurized tank type powder and granular material cutting device according to the present invention. Reference numeral 1 denotes a pressure tank (silo), which is composed of a cylindrical main portion 1a having a ceiling portion and a bottom portion 1b. A collar 10 is provided in the middle, and the collar 10 is a load cell provided on a stand 3. Is supported via a weighing device 30 such as. A cutting device 2 is built in the bottom portion 1b of the pressure tank 1. The cutting device 2 has a rotary feeder (or rotor) 20 attached to a rotary shaft 220 driven by a motor 22, and the rotary feeder 20 has a pocket portion 21 at its peripheral portion. The bottom portion 1b is provided with an air blowing nozzle 23 so that the air outlet is exposed to the pocket portion 21, and the air blowing nozzle 23 is connected to the compressed air supply source 18 by a pipe. Further, a nozzle 24 as a discharge port is provided on the side of the pocket portion 21, and the nozzle 24 is guided by a hose 25 to a desired place where the powdery or granular material is used.

An inlet 11 is provided in the center of the ceiling of the main portion 1a of the pressure tank 1, and an exhaust pipe 12 is connected to the side of the inlet 11. The opening 11 is provided with an opening / closing valve (closing valve) V _{1 which} is operated from the outside. Further, a guide hopper 4 is detachably fixed to the input port 11 with a lower flange 43. As shown in FIG. 2, the guide hopper 4 has a taper portion 40 and a straight tube portion 41 extending upward from the taper portion 40, and the upper end of the straight tube portion 41 has a trumpet shape for supporting a container bag 6 described later. Is provided. Further, on the outer side of the supporting portion 42, an upper plate 43 extending horizontally is provided. The upper plate 43 preferably has a hinge 430 in the middle so that the upper plate 43 can be opened to facilitate inspection and replacement of the filter 8 of the dust processing body 5 described later.

Reference numeral 5 denotes a dust processing body combined with the guide hopper 4. The dust processing body 5 has a surrounding wall 50 that surrounds the guide hopper 4 substantially concentrically, and an inclined bottom wall 53 provided below the surrounding wall 50. The inclined bottom wall 53 is airtight with the tapered portion 40. The columns 17 are joined and are supported by columns 17 that stand up from the ceiling of the pressure tank 1. The surrounding wall 50 extends upward, and exhaust holes 52, 52 are provided in a portion corresponding to the lower side of the upper plate portion 43, and clean air is discharged to the outside from here.

Therefore, the dust processing body 5 constitutes an annular processing chamber 7 around the guide hopper 4, and a partition wall 51 is provided at an intermediate portion of the processing chamber 7. The filter 8 is arranged on the partition wall 51. The filter 8 may be of any type as long as it can collect particles by passing deer-containing gas through the filter medium. In this embodiment, a bag filter is used. More specifically, an opening 510 is provided in the partition wall 51, a porous support 80 made of a wire mesh or the like is provided on the opening 510, and a filter cloth 81 is externally attached to the outer periphery of the support 80. ing. The filter 8 may have a ring shape as a whole, but in this embodiment, a cylindrical support 80, a filter and a filter cloth 81 are arranged at a predetermined interval as shown in FIG.

As shown in FIG. 3, an opening 55 is provided from the upper part of the dust processing body 5 to a required area. Correspondingly, an opening 45 communicating with the inside is provided in the straight cylindrical portion 41 of the guide hopper 4. ing. These openings 45, 55 are operation ports for opening the bottom lid of the container bag 6. The container bag 6 has a suspending member 60 on the upper portion, and the suspending member 60 is suspended by an overhead crane or the like and installed on the taper-shaped support portion 42 of the guide hopper 4. The exhaust pipe 12 has an upper end connected to the inclined bottom wall 53 of the dust processing body 5. Although this connection is upward in the embodiment, it may be opened laterally, that is, in the tangential direction of the tapered portion 40 of the guide hopper 4. A dust recovery pipe 9 is connected to the lowermost side of the inclined bottom wall 53, and the dust recovery pipe 9 is connected to the ceiling of the pressure tank 1 via a dust recovery valve V ₄ . Further, the exhaust pipe 12 has an exhaust valve V _{2 in the} middle, and an ejector portion 13 is provided on the downstream side of the exhaust valve V ₂ . The ejector portion 13 is for guiding the compressed air to the downstream side of the exhaust pipe 12 so as to give the exhaust pipe a suction force. The exhaust pipe 12 is provided with a ring 130 having a guide hole 131 that obliquely communicates with the exhaust pipe 12. An air hose 132 is connected to the hole 131, and the air hose 132 is connected to a compressed air supply source via an ejector valve V ₃ .

[0010]

[Operation of the embodiment]

Next, the method of use and the operation of this embodiment will be described. The granular material A is filled in the container bag 6 and placed in a storage space or the like. In the state shown in FIG. 1, the pressurized tank 1 is filled with the particulate material A, and the charging valve V ₁ , the exhaust valve V ₂ , the ejector valve V ₃ and the dust recovery valve V ₄ are closed. When the drive motor 22 is rotated in this state and compressed air is supplied from the compressed air supply source 18 to the air blowing nozzle 23, the rotary feeder 20 rotates, so that the particulate matter A in the tank is pocketed. When the pocket portion 21 is filled in the portion 21 and the rotation feeder 20 rotates to match the pocket portion 21 with the discharge port 24, the compressed air blown from the air blowing nozzle 23 causes the compressed air blown into the discharge port 24 to project the hose 25. It is then conveyed to the destination by air flow and blown or sprayed.

In this way, the granular material is cut out quantitatively, and when the remaining amount in the tank reaches a certain level, it is confirmed by the signal from the weighing device 30 that the granular material needs to be replenished. . Therefore, when this replenishment becomes necessary, the drive of the motor 22 is stopped and the supply of the compressed air from the compressed air supply source 18 to the air blowing nozzle 23 is stopped. Then, the exhaust valve V ₂ is opened. As a result, the inside of the pressure tank 1 and the processing chamber 7 of the dust processing body 5 are connected by the exhaust pipe 12. As a result, the pressurized air in the pressurized tank 1 is extracted by the exhaust pipe 12 and sent into the processing chamber 7, and since the filter 8 is arranged in the processing chamber 7, the air in the tank containing dust is Dust is collected by passing through the filter 81, and only clean air is discharged from the opening 52 at the upper part of the dust processing body.

In this way, when the pressure in the pressure tank 1 reaches the atmospheric pressure, the closing valve V ₁ is opened and the ejector valve V ₃ is opened. Then, a hand is inserted through the operation openings 45 and 55 to open the bottom lid of the container bag 6 arranged in the guide hopper 4. As a result, the granular material A flows down through the guide hopper 4 and freely falls from the charging port 11 into the pressurizing link 1. Then, the ejector valve V ₃ is opened at the start of the charging. Then, the compressed air reaches the ejector portion 13 through the air hose 132, and is blown into the exhaust pipe 12 through the guide hole 131 of the ejector portion. Due to this blowing, a suction force is exerted on the exhaust pipe 12 in the downstream direction, whereby the air in the pressure tank 1 is efficiently sucked. For this reason, the granular material A flowing down from the container bag 6 is sucked into the pressure tank 1, so that the granular material A drops very well. Furthermore, since the air in the tank is efficiently sucked into the processing chamber 7 by the suction action of the exhaust pipe 12, dust generation in the pressure tank 1 is prevented. Then, the deer-containing air sent from the pressure tank 1 into the processing chamber 7 is collected by passing through the filter 510 from the opening 510, becomes clean air, and is discharged to the outside from the upper opening 52.

The collected dust falls into the processing chamber 7, and since the processing chamber 7 has the inclined bottom wall 53, the dust collects on the bottom of the inclined bottom wall 53. Since the exhaust is efficiently performed in this way, the internal pressure does not increase in the pressure tank 1 even if the amount of the particulate matter A added increases, and therefore pressurized air containing dust is discharged to the outside through the guide hopper 4. There is no need to push it, and dust is suppressed and it is quickly put into the tank. When charging of the granular material A is completed, the charging valve V ₁ is closed. However, at this time, the exhaust valve V ₂ and the ejector valve V ₃ are still kept open. Therefore, the air in the space inside the tank passes through the exhaust pipe 12 and enters the processing chamber 7. On the other hand, the dust collecting valve V ₄ is opened when the input valve V ₁ is closed, so that the dust accumulated at the bottom of the processing chamber 7 passes through the dust collecting pipe 9 and the pressure tank. Returned to 1. Therefore, it is possible to automatically return the dust to the pressurized tank without the need to collect dust separately.

After a lapse of a predetermined time, the exhaust valve V ₂ and the ejector valve V ₃ are closed, and when the dust inside the processing chamber 7 is completely returned, the dust recovery valve V ₄ is closed. Here, cutting is performed by driving the rotary feeder 20 again and blowing air from the air blowing nozzle 23 as described above.

It should be noted that, as described above, when exhausting the inside of the pressure tank prior to charging the powdery or granular material, the exhaust pipe 12 is introduced into the processing chamber 7 and filtered by passing through the filter 8. Therefore, the dust is prevented from being discharged to the outside, and at the same time, the air in the pressurized tank is put into the processing chamber 7 with a large volume, and it is discharged through the filter cloth. Therefore, the noise is also very small.

[0016] After closing the charged valve V _1, a certain period of time, retains left open the exhaust valve V ₂ and the ejector valve V _3, the exhaust valves V ₂ and ejector valve V ₃ is optionally introduced The valve V ₁ may be closed at the same time as it is closed. In this case, the dust in the processing chamber 7 falls freely into the pressure tank 1 by opening the dust recovery valve V ₄ .

[0017]

[Effect of the device]

According to the present invention described above, in a pressurized tank type powder and granular material cutting device, a ring-shaped processing chamber 7 having a bottom is defined on the outer circumference of the hopper 4, and the bottom of the processing chamber 7 is defined. Is connected to the exhaust pipe 12, and the exhaust pipe 12 is provided with an ejector portion 13 that guides air in the downstream direction of the exhaust pipe. Therefore, scattering of dust and noise in the pressurized tank 1 after cutting are reduced. In addition, since the air flows from the ejector unit 13 to the downstream of the exhaust pipe 12 when the powdery or granular material is charged, the pressure tank 1 is positively depressurized, and thereby the powdery or granular material pressure tank The inside is very well dropped, and at the same time, the dust is collected by the filter 8 in the processing chamber, so it is possible to reliably prevent the dust from scattering to the outside, and to throw in the powder and particulate matter in a clean state. To do Kill. Further, since the lower part of the processing chamber 7 is configured to be inclined downward and the lower part is connected to the upper part of the tank through the dust recovery valve V ₄ , the dust collected by the filter 8 as described above is pressurized in the pressure tank. Therefore, the dust is automatically collected, and the complicated work such as connecting the exhaust pipe to the dust collector and sucking is unnecessary, and no special equipment such as a motor is required. Therefore, there is an advantage that the space is not increased.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a pressurized tank type powder and granular material cutting device according to the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is an explanatory view showing an operation time chart of each valve in the device of the present invention.

[Explanation of symbols]

1 ... pressure tank 2 ... cutout device 4 ... guide hopper 5 ... dust treatment member 6 ... Container bag 7 ... processing chamber 8 ... filter 9 ... dust collection pipe 11 ... inlet 12 ... exhaust pipe 13 ... ejector unit V ₁ ... turned Valve V ₂ Exhaust valve V ₃ Ejector valve V ₄ Dust recovery valve

Claims (2)

[Scope of utility model registration request] 1. A cutout device is built in a lower part of a pressure resistant tank, a charging port having an opening / closing valve and an exhaust pipe having an exhaust valve on the side thereof are provided in the upper part of the tank, and a guide hopper is provided above the charging port. In the pressurized tank type powder and granular material cutting device of the type provided with, a ring-shaped processing chamber with a bottom having a built-in filter is defined on the outer periphery of the guide hopper, and the lower portion of the processing chamber is connected to an exhaust pipe. , A pressure tank type powder and granular material cutting device, characterized in that the exhaust pipe is provided with an ejector portion for guiding air in a downstream direction of the exhaust pipe. 2. The pressure tank type powder and granule slicing device according to claim 1, further comprising a lower part of the processing chamber which is inclined downward and whose lower end is connected to an upper part of the tank through a recovery valve.