JP3027189U - Powder / granule loading device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To quickly and smoothly supply powdered and granular materials without emitting dust to the outside, simply by attaching to the existing pressure vessel without modifying the existing pressure vessel. (EN) Provided is a simple and compact powder-and-granular substance charging device which can realize maintenance-free operation without clogging of a filter. A container (2) having a filter (2b) built in outside a guide hopper (1) having a mounting and fixing part for a pressure vessel (B).
A dust collector 2 having a and a blower 3 are provided. In the guide hopper 1, a closing valve V2 is interposed in the straight tube portion 1b, and a tapered inner cylinder 4 extending to the charging port b of the pressure vessel B is provided in the straight tube portion lower than the closing valve V2 to collect dust. The suction side of the blower 3 is connected to the exhaust chamber 20 of the container 2a of the collector 2 and the pulse air supply system including the pulse valve V4 for backwashing is connected to the container 2a.
On the gas introduction side of the tapered inner cylinder 4, a slanted conduit portion 2c communicating with the straight cylindrical portion 2b of the outer peripheral region of the tapered inner cylinder 4 is continuously provided, and the slanted conduit portion 2c is provided with a blower 3 in the outer peripheral region of the tapered inner cylinder 4. There is an intake valve V3 for exerting a suction force by.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a powder / granular material charging device suitable for charging powder / granular materials to pressurized containers.

[0002]

[Prior art]

 Various powders and granules are used in the fields of metal refining, chemistry, civil engineering, food processing, etc., and these powders and granules are generally referred to as tanks, chambers, silos, etc. ) Is filled and stored in compressed air, and it is quantitatively cut out at the time of use by a feeder, such as a rotary wheel, a rotor, or a screw, which uses only compressed air or a combination of compressed air, and is conveyed to a target location through a hose or the like. For this reason, it is necessary to replenish the powder / granular material from the charging port every time the powder / granular material in the pressure vessel reaches a certain remaining amount. For this reason, in the past, a hopper was provided at the inlet of the pressure vessel, an opening / closing valve such as a cone type or butterfly type was provided inside the inlet, and an exhaust valve for adjusting the pressure inside the vessel was provided to the side of the inlet. Is provided. Then, the granular material is stored in a cloth bag, which is generally called a container bag, and transported to the hopper by a crane, etc., and at the time of charging, the exhaust valve of the pressure container was opened and the internal pressure of the pressure container became equal to the atmospheric pressure. By the way, a method is adopted in which the opening / closing lid of the container bag is released and the container is allowed to fall freely into the pressure vessel through the hopper.

[0003]

[Problems to be solved by the device]

 However, in such a charging means, the space volume in the pressure vessel is reduced due to the accumulation of the powdery particles accompanying the charging. Of course, at the time of this injection, the exhaust valve is opened to exhaust the air in the pressure vessel, but since the space volume inside the vessel decreases rapidly due to the powdered and granular material having a large opening area, the exhaust pipe is used. Exhaust is too late. Especially when a filter is attached to the exhaust pipe, the exhaust efficiency is reduced, which is even more so. For this reason, the pressure inside the container rises above atmospheric pressure as the powder and granules are charged, which causes the powder and granules to fall less easily, and the pressurized air inside the container seeks an escape area. The phenomenon of thrusting outward from the inlet through the hopper is repeated intermittently. In addition, the drop impact at the time of loading throws up the powder and particulate matter, and it is discharged from the exhaust pipe as dust. For this reason, a large amount of dust is scattered around the pressure vessel, which damages the work environment, and high-pressure air is emitted directly from the exhaust pipe, causing tremendous noise and similarly damaging the work environment. It was what was there.

As a countermeasure against this, a ring-shaped processing chamber with a bottom is provided on the outer circumference of the guide hopper, and a filter is arranged therein. The lower part of the processing chamber is connected to an exhaust valve of a pressure vessel by an exhaust pipe, and its exhaust pipe It has been proposed to provide an ejector section for adding compressed air. However, since this is a ring-shaped processing chamber, it becomes a large-scale device, and a pressure recovery container must be provided with a dust recovery pipe with a separate on-off valve only for returning collected dust. Therefore, there is a problem that the existing pressure vessel cannot be applied as it is and a large amount of modification cost is required. Secondly, since the exhaust pipe of the pressure vessel is usually thin, it is difficult to quickly reduce the pressure inside the pressure vessel through this, which consumes a large amount of compressed air and takes a long time for charging. Thirdly, the particulates falling from the guide hopper into the pressure vessel via the bell-type injection valve are sucked from the exhaust pipe and the filter is apt to be clogged, and the injection operation was stopped to regenerate the filter. It tends to have to be done. Therefore, it was necessary to make it a ring-shaped processing chamber and equip more filters than necessary.

The present invention was devised to solve the above-mentioned problems, and the purpose thereof is to attach the powdery or granular material to the existing pressure vessel without modifying the existing pressure vessel. (EN) A simple and compact powder / granular substance charging device that can be quickly and smoothly replenished with no noise to the outside while suppressing noise, and that does not cause filter clogging. It is in.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention has a container having a filter built in outside a guide hopper having a mounting and fixing portion for a pressure container for filling and cutting out powdery or granular material. Each of the guide hopper is provided with a dust collector and a blower, and a feed valve for controlling the flow of the granular material is interposed in the straight cylinder portion following the main portion, and a straight cylinder lower than the feed valve is provided. A tapered inner cylinder extending to the inlet of the pressure vessel is provided inside the unit, and the suction side of the blower is connected to the exhaust chamber of the container of the dust collector and a pulse air valve equipped with a pulse valve for backwashing is installed. A supply system is connected, and on the gas introduction side of the container, a slanted conduit part is provided, the tip of which communicates with the straight cylindrical part of the outer peripheral region of the tapered inner cylinder, and the upper end of the slanted conduit part is connected to the pressure vessel. Connect the exhaust pipe from the exhaust valve provided One is to lower slant conduit portion intermediate portion than the connection portion position is obtained by a structure in which intervening suction valve for applying a suction force by the blower in the peripheral region of the tapered inner cylinder.

[0007] Preferably, the guide hopper includes a controller, to which the supply valve, the suction valve, the pulse valve, and the operation part of the blower are connected, and the exhaust valve is opened at the first time point. At the second time point after a fixed time, the supply valve and suction valve are opened and the pulse valve and blower are driven, which starts the injection of powdery particles through the tapered inner cylinder, and at the same time suction by the blower. By force, the air in the pressure vessel is forcibly discharged from the outer circumference of the tapered inner cylinder through the dust collector, and pulse air is periodically applied to the filter of the dust collector to backwash it. The blower drive is stopped as soon as the supply valve is closed, and the suction valve and the pulse valve are kept open until the fourth point after a predetermined time, so that the dust separated from the filter is removed from the pressure vessel. Back to After a certain time, the exhaust valve will be controlled in a sequence of closing.

[0008]

[Embodiment of device]

 Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 7 show an embodiment of a powdery or granular material charging device according to the present invention. In FIGS. 1 to 3, A is a powdery or granular material charging device according to the present invention, and B is the powdery or granular material charging device A. It is a pressure vessel equipped with, and in this example, a tank with a built-in feeder is used. The pressure vessel B is provided with, for example, a feeder for quantitatively cutting out, which is composed of a compressed air blowing nozzle and a feed wheel (not shown) at the bottom, and is equipped with an exhaust pipe 9 having an exhaust valve V1 at the upper part. The powder-and-granular substance charging device A is configured as a unit in which a guide hopper 1 is equipped with a dust collector 2 and a blower 3.

The guide hopper 1 is connected to the main portion 1 a, which has a main portion 1 a whose upper portion has a large tapered opening for receiving a charging means C such as a container bag or chute and whose lower portion is tapered. And a straight tube portion (neck portion) 1b, and a flange 100 is provided at the lower end of the straight tube portion 1b as a mounting and fixing portion. The flange 100 is installed and fixed by bolts 103 around the inlet port b of the pressure vessel B. ing. A taper-shaped inner cylinder 4 which appropriately protrudes into the pressure vessel from the charging port b is fixed to the straight cylindrical portion 1b with its upper edge portion, and the charging port is provided between the outer surface of the tapered inner cylinder and the inner surface of the straight cylindrical portion. A gap is formed that gradually expands toward b. A replenishment valve V2 for controlling the feeding of the powdery or granular material P flowing down from the feeding means C is provided in the straight tubular portion 1b above the tapered inner tube 4. Inside the main part 1a, a wire net 101 for holding the charging means C is stretched, and on the side surface of the main part higher than the wire net 101, the opening operation of the opening / closing lid part of the charging means C and the granular material. An inspection port 102 for visually recognizing the flow-down state is provided.

In the dust collector 2, a compact filter 2b is internally arranged in a box-shaped container 2a fixed by a bracket 200 on the outer periphery of the main portion 1a. At the lower portion of the container 2a, that is, at the introduction side, a slanting conduit portion 2c having a throat portion 21 whose cross-sectional area is gradually reduced is continuously provided, and the lower end of the slanting conduit portion 2c is tapered as shown in FIG. The straight inner cylinder 4 is communicated with the straight cylindrical portion 1b so as to face the intermediate outer peripheral surface thereof, and the intake valve V3 is interposed in the middle portion of the oblique conduit portion 2c. The exhaust chamber 20 of the container 2a can be opened / closed by an opening / closing lid 2d. The blower 3 is installed and fixed to an abutment 30 provided on the straight cylinder portion 1b or the main portion 1a, and the suction side of the blower 3 is connected to the suction pipe 5 such as a hose as shown in FIGS. It is connected to the exhaust chamber 20 of the container 2a. On the other hand, an exhaust pipe 9 including a hose is connected to the exhaust valve V1, and the exhaust pipe 9 is connected to the throat portion 21 of the dust collector 2 as shown in FIG. A pulse air supply system 7 including a hose is connected to the exhaust chamber 20 of the dust collector 2 at a position out of phase with the suction pipe 5, and the pulse air supply system 7 is Communicating with a compressed air supply such as a compressor. A pulse valve V4 that repeats opening and closing at a desired cycle is interposed in the pulse air supply system 7.

In this embodiment, the supply valve V2 and the intake valve V3 are air-driven butterfly valves, the exhaust valve V1 is an air-driven rotary valve, and the pulse valve V4 is on / off time. It consists of a freely adjustable 2-position switching solenoid valve. The drive unit and the drive unit of the blower 3 are connected to a multiple solenoid valve or a remote control solenoid valve of the controller 8 provided in the guide hopper 1, respectively, so that they are started and stopped by the operation of the controller 8. Has become. The controller 8 is set with a sequence in which the exhaust valve V1, the supply valve V2, the intake valve V3, the pulse valve V4, and the blower 3 are started and stopped in a predetermined order. FIG. 4 shows the timing chart. That is, the exhaust valve V1 is opened at the first time point T ₁ , the replenishment valve V2 and the intake valve V3 are opened at a second time point T ₂ after a certain time from this, the operation of the pulse valve V4 is started, and the blower 3 is driven again. Then, the closing period is started, and thereafter, at the third time point T ₃ , the supply valve V 3 is closed and the drive of the blower 3 is stopped. At the fourth time point T _{4, the} intake valve V 3 is closed and the pulse valve V 4 is turned on. The operation is stopped, and finally the exhaust valve V1 is closed at the fifth time point T ₅ .

[0012]

[Operation of the embodiment]

 Next, the charging procedure and its operation in this embodiment will be described. The granular material P is filled in the charging means C in advance and placed and stored in a storage space or the like. When a sufficient amount of the powder or granular material P is secured in the pressure vessel B, the exhaust valve V1, the supply valve V2, the intake valve V3 and the pulse valve V4 are closed, and the blower 3 is also driven. Has been stopped. In this state, when compressed air is supplied from a compressed air supply source (not shown), the powder and granular material P is quantitatively cut out by the feeder, and the air flow is conveyed from the airtight container B to a desired place through a hose or the like. Then, blowing and spraying are performed. In this way, the remaining amount decreases by quantitatively cutting out the granular material P, and when the residual amount reaches a predetermined amount, a weighing device or the like sends a signal for starting the supply process of the granular material P to the controller 8 Sent to.

First, at the first time point T ₁ , the exhaust valve V1 is opened. By opening the exhaust valve V1, the inside of the pressure vessel B and the inside of the dust collector 2 communicate with each other via the oblique conduit portion 2c. As a result, the pressurized air existing in the pressure vessel B enters the container 2a while decreasing the flow velocity through the exhaust pipe 9 through the throat portion 21 at the upper end of the oblique conduit portion as shown in FIG. After being cleaned by passing through the filter 2b disposed in the exhaust chamber, the exhaust chamber 20 is naturally exhausted to the atmosphere.

When the pressure in the pressure vessel B becomes equal to the atmospheric pressure in this way, the charging means C stored in the storage space by the ceiling crane or the like is charged from the upper opening of the guide hopper 1. , Is installed on the wire net 101. Subsequently, as shown in FIG. 4, at the second time point T ₂ , the supply valve V2, the suction valve V3 and the pulse valve V4 are opened and the blower 3 starts driving. At this time, if the closing state of the charging means C is released, the granular material P passes through the charging valve V2 in the valve opening state from the charging means C and is attached to the straight cylindrical portion 1b as shown in FIG. It freely falls from the inlet b into the pressure vessel B through the inner cylinder 4. At this time, since the intake valve V3 is opened and the blower 3 is driven to be in the exhaust state, the chamber 2a and the slanted conduit portion 2c form a suction system having a large cross-sectional area, and negative pressure generated by intake air is generated. Due to the pressure, a large amount of air in the pressure vessel B is forcibly sucked into the container 2a from between the straight cylinder portion 1b and the tapered inner cylinder 4 through the oblique conduit portion 2c. At this time, the air in the pressure vessel B is also sucked into the container 2a by the exhaust valve V1 and the exhaust pipe 9 which are open at the same time.

Since the connecting position of the slanted conduit portion 2c to the straight cylindrical portion 1b is at the outer peripheral position of the middle portion of the tapered inner cylinder 4 having a free end inside the charging port b, the granular material P is not sucked. Therefore, it can be smoothly dropped into the pressure vessel B through the tapered inner cylinder 4. Due to the oblique conduit portion 2c having a large cross-sectional area, the suction amount of air by the blower 3 is appropriately larger than the volume increase (that is, the space reduction amount) due to the introduction of the powder or granular material P. Keeps a negative pressure. As a result, the granular material P flowing down from the charging means C is forcibly sucked into the pressure container B, the drop of the granular material P into the pressure container B is very stable, and dust generation is suppressed. At the same time, prompt input is achieved. The air containing dust sucked into the container 2a of the dust collector 2 as described above is collected when passing through the filter 2b, purified, and then exhausted from the blower 3. Since the pulse valve V4 has also started to operate from the second time point T ₂ , compressed air is periodically blown into the exhaust chamber 20 of the dust collector 2 through the pulse air supply system 7, and Thus, the dust collected by the filter 2b is periodically shaken off from the filter 2b. Therefore, the filter 2b is automatically regenerated and clogging due to dust is prevented, so that the performance of the filter 2b can be maintained high.

When the charging means C finishes charging the required amount of the granular material P and reaches the third time point T ₃ which is confirmed by a weighing machine or the like, as shown in FIG. Is closed and the drive of the blower 3 is stopped. As a result, the straight tube portion 2b is closed, and the forced intake of air from the pressure vessel B is stopped. However, during this time, the exhaust valve V1 and the intake valve V3 are kept open, and the pulse valve V4 is still driven. Therefore, the backwashing cleaning of the filter 2b by the compressed air periodically blown through the pulse valve V4 is continued, and the dust squeezed from the filter 2b is returned to the pressure vessel B through the slanted conduit portion 2c as a passage. It After that, at the fourth time point T ₄ , the intake valve V3 is closed and the operation of the pulse valve V4 is stopped. Then, further exhaust valve V1 is closed at the fifth time point T ₅ calm the pressure vessel B after a predetermined period of time has elapsed, supply process of particulate matter P is completed.

As described above, in the present invention, the air in the pressure vessel B is forcibly sucked by the blower 3 from the outer annular gap of the flow-down passage during the charging of the particulate matter P, and the dust is collected and then discharged. Since the internal pressure in the pressure vessel B does not increase, the pressurized air containing dust is not pushed through the guide hopper 1 to the outside, and the dust generation is suppressed and the powdery or granular material P is quickly discharged. It can be put into the pressure vessel B. Further, since the pulse valve V4 is activated during the material feeding to periodically regenerate the filter 2b of the dust collector 2 with compressed air, the filter 2b is not clogged at all and the dust can be reliably collected. At the same time, the maintainability is good, and the periodical air blowing by the pulse valve V4 is maintained for a certain period of time even after the forced suction in the pressure vessel B by the blower 3 is completed, so that the dust is separated from the filter 2b and the oblique shape is maintained. It can be returned into the pressure vessel B through the conduit portion 2c.

[0018]

[Effect of device]

 According to claim 1 of the present invention described above, the following excellent effects can be obtained. Since the suction side of the blower 3 is connected to the exhaust chamber 20 of the container 2a of the dust collector 2 and the pulse air supply system equipped with the pulse valve V4 for backwashing is connected, powder and granular materials are introduced. While the filter is being regenerated, the number of filters 2b is small and the chamber 2a for accommodating the filters is compact. A tapered inner cylinder 4 extending to the charging port b of the pressure vessel B is provided in the straight cylinder part, and the straight cylinder part 2 b in the outer peripheral region of the tapered inner cylinder 4 is provided on the gas introduction side of the container 2 a of the dust collector 2. Since the slanting conduit portion 2c communicating with the suction conduit V3 is provided at the middle portion of the slanting conduit portion, the suction valve V3 for causing the suction force of the blower 3 to act on the outer peripheral region of the tapered inner cylinder 4 is provided. Depending on the timing of opening and closing, the air containing dust from the pressure vessel and the dust return can be performed by a single passage, so it is not necessary to provide a pipe or valve for the dust return in the pressure vessel, and the pulse valve described above can be used. The entire structure including the regeneration function and the Machimachi dust collector 2 can be made compact and simple, and the existing pressure vessel does not need to be modified. Since only usable installing, it is possible to greatly reduce the equipment cost and running cost. A tapered inner cylinder 4 extending to the charging port b of the pressure vessel B is provided in the straight cylinder portion, and the taper inner cylinder 4 communicates with the straight cylinder portion 2b in the outer peripheral region of the tapered inner cylinder 4 on the gas introduction side of the container 2a of the dust collector 2. Since the inclined conduit portion 2c is continuously provided and the suction valve V3 for exerting the suction force of the blower 3 is provided in the outer peripheral region of the tapered inner cylinder 4 at the intermediate portion of the inclined conduit portion, the inclined conduit portion having a large sectional area is provided. With the cooperation of the portion 2c and the blower 3, the pressure inside the pressure vessel B can be rapidly reduced to negative pressure, and the free-falling powdery particles can be smoothly dropped into the pressure vessel B without suction. As a result, a large amount of powdery or granular material P can be charged into the pressure vessel within a short time while suppressing dust generation and noise.

According to the second aspect, the guide hopper 1 further includes a controller 8, and the exhaust valve V1, the supply valve V2, the intake valve V3, the pulse valve V4, and the drive unit of the blower 3 are connected to the controller 8. Then, the exhaust valve V1 is opened at the first time point T ₁ , the replenishment valve V2 and the intake valve V3 are opened at a second time point T ₂ after a certain time from this, and the pulse valve V4 and the blower 3 are driven, driven stop of the blower 3 with the supply valve V2 is closed at the third time point T ₃ of input ends, then the suction valve V3 and pulse valve V4 to the fourth time point T _4, which at a predetermined time in the open state Since the exhaust valve V1 is kept closed and the operation is controlled in a sequence that the exhaust valve V1 is closed after a certain period of time, during the charging period, the powdery material is started to be supplied through the tapered inner cylinder 4 and the blower 3 is operated at the same time. From the outer circumference of the tapered inner cylinder 4 by suction force The air in the power container is purified through the dust collector 2 while being forcedly exhausted, and pulsed air is periodically applied to the filter 2b of the dust collector 2 to perform a regeneration process automatically. When the charging is completed, the filter 2b of the dust collector 2 is further regenerated, and the operation of returning the dust separated from the filter 2b into the pressure vessel B is automatically performed. Therefore, the excellent effect that maintenance-free and smooth automatic loading work can be performed is obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing the structure of a powdery or granular material charging device according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a timing chart of a valve and a blower in the powdery or granular material charging device of the present invention.

5 is an explanatory diagram showing a first stage of the charging step shown in FIG. 4. FIG.

6 is an explanatory diagram showing a second stage (feeding period) in the feeding step shown in FIG.

FIG. 7 is an explanatory diagram showing a state of a third stage (after the charging period) in the charging step shown in FIG.

[Explanation of symbols]

 A powder and granular material charging device B pressure container P powder and granular material 1 guide hopper 2 dust collector 2a container 2b filter 2c oblique conduit part 3 blower 4 tapered inner cylinder 7 pulse air supply system 8 controller 9 exhaust pipe 20 exhaust chamber V1 Exhaust valve V2 Supply valve V3 Suction valve V4 Pulse valve

Claims (2)

[Scope of utility model registration request] 1. A dust collector 2 having a container 2a containing a filter 2b on the outside of a guide hopper 1 having a mounting and fixing portion for a pressure vessel B for filling and cutting out powdery or granular material.
And a blower 3 are provided, and the guide hopper 1 has a closing valve V2 for controlling the flow-down of the granular material P in the straight cylindrical portion 1b following the main portion 1a, and is positioned lower than the closing valve V2. A straight inner cylinder 4 extending to the inlet b of the pressure vessel B is provided in the straight cylinder part of the container, and the suction side of the blower 3 is connected to the exhaust chamber 20 of the container 2a of the dust collector 2 while backwashing. Pulse valve V4
Is connected to a pulsed air supply system, and a slanting conduit portion 2c having a tip communicating with a straight cylindrical portion 2b in the outer peripheral region of the tapered inner cylinder 4 is connected to the gas introduction side of the container 2a. An exhaust pipe 9 from an exhaust valve V1 provided in the pressure vessel B is connected to an upper end portion of 2c, and a tapered inner cylinder 4 is provided in an intermediate portion of an oblique conduit portion lower than the connection portion.
A powdery / granular substance charging device characterized in that a suction valve V3 for applying a suction force by the blower 3 is interposed in the outer peripheral region of the. 2. A dust collector 2 having a container 2a containing a filter 2b on the outside of a guide hopper 1 having a mounting and fixing portion for a pressure container B for filling and cutting out powdery or granular material.
And a blower 3 are provided, and the guide hopper 1 has a closing valve V2 for controlling the flow-down of the granular material P in the straight cylindrical portion 1b following the main portion 1a, and is positioned lower than the closing valve V2. A straight inner cylinder 4 extending to the inlet b of the pressure vessel B is provided in the straight cylinder part of the container, and the suction side of the blower 3 is connected to the exhaust chamber 20 of the container 2a of the dust collector 2 while backwashing. Pulse valve V4
Is connected to a pulsed air supply system, and a slanting conduit portion 2c having a tip communicating with a straight cylindrical portion 2b in the outer peripheral region of the tapered inner cylinder 4 is connected to the gas introduction side of the container 2a. An exhaust pipe 9 from an exhaust valve V1 provided in the pressure vessel B is connected to an upper end portion of 2c, and a tapered inner cylinder 4 is provided in an intermediate portion of an oblique conduit portion lower than the connection portion.
An intake valve V3 for exerting a suction force by the blower 3 is interposed in the outer peripheral region of the guide hopper 1, and the guide hopper 1 includes a controller 8, and the controller 8 includes an exhaust valve V1, a supply valve V2, and an intake valve V3. And pulse valve V
4 and the drive unit of the blower 3 are connected, the exhaust valve V1 is opened at the first time point T ₁ , and the second time point T after a lapse of a certain time from this point.
_{At 2} , the replenishment valve V2 and the intake valve V3 are opened, the pulse valve V4 and the blower 3 are driven, and at the third time point T ₃ at the end of closing, the replenishment valve V2 is closed and the drive of the blower 3 is stopped. then, characterized in that the suction valve V3 and the pulse valve V4 to the fourth time point T _4, which at a predetermined time is kept opened, are controlled by the sequence in which the exhaust valve V1 is closed after a predetermined time Powder and granular material charging device.