JP3790373B2 - Powder transportation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a granular material transport device for transporting a granular material such as a synthetic resin raw material by a gas flow.
[0002]
[Prior art]
Conventionally, the following devices are known as this type of granular material transport device.
A granular material storage tank, an opening / closing device connected to an outlet at a lower portion of the granular material storage tank, operated by an operating device, a transport pipe having an inlet connected to the outlet of the switching device, and A gas / powder separator with an inlet connected to the outlet of the transport pipe, and a negative pressure inside the transport pipe connected to the gas outlet of this gas / powder separator, and from the powder storage tank into the transport pipe In a particulate transport device having a suction device that creates a gas flow toward the gas / powder separator, an outside air inlet is formed in a transport pipe in the vicinity of the particulate reservoir, and this outside air inlet A filter or net is attached to the actuator, and the opening / closing device operating device and the powder receiving part (in the gas / powder separator or in the powder receiving hopper connected to the outlet) are emptied. Detectors and suction device actuators are connected to the signal line. It is known that the suction device actuating device and the opening / closing device actuating device are actuated by a signal from the control device that is connected to the control device and receives a signal that it is empty from the detector. Yes.
[0003]
[Disadvantages of the prior art]
The conventional apparatus for transporting granular materials has the following drawbacks.
Signals between the switchgear operating device (powder supply side) and the control device provided close to the detector / suction device (powder receiving side), which is generally far away from it Since it was necessary to connect with a wire, the labor is troublesome, and the exchange of the powder storage tank, that is, the powder storage tank currently used for another type of powder storage tank Even in the work of exchanging / connecting with the granule storage tank, the connection of the signal line has to be changed, which is troublesome.
[0004]
[Means for Solving the Problems ]
The present invention employs the following means in order to eliminate the above disadvantages.
The invention of claim 1 includes a granular material storage tank that has an inlet and an outlet for the granular material, stores the granular material, and sends the granular material from the outlet via an opening / closing device, and a granular material receiver A granular material receiving hopper located on the side, a transport pipe for transporting the granular material delivered from the switchgear to the granular material receiving hopper, and the granular material receiving hopper are connected by a conduit, and the powder A suction device having an exhaust port that creates a gas flow from a particle storage tank toward the particle receiving hopper and opens to the atmosphere, and detects that the particles in the particle receiving hopper disappear. A closing plate housed inside the transport pipe abuts on the edge of the air inlet formed in the vicinity of the powder storage tank in the transport pipe and a control device that operates the suction device by the force of the spring The inside of the transport pipe is in a set negative pressure state A detector that detects that the closing plate has opened the outside air inlet against the force of a spring; and a control device that controls the opening and closing device of the powder storage tank based on a detection signal of the detector. It is characterized by providing.
The invention of claim 2 has a granular material storage tank that has an inlet and an outlet for the granular material, stores the granular material, and sends the granular material from the outlet through an opening / closing device, and a granular material receiver The granular material receiving hopper located on the side, the transport pipe for transporting the granular material sent from the opening and closing device to the granular material receiving hopper, and the granular material receiving hopper are connected by a conduit having an air inlet. A suction device that is connected to create a gas flow from the granular material storage tank toward the granular material receiving hopper, a valve that opens and closes the air inlet of the conduit, and the granular material in the granular material receiving hopper A control device for operating the suction device by detecting the disappearance and controlling the opening and closing of the valve according to an appropriate setting, and the edge of the outside air inlet formed in the vicinity of the granular material storage tank in the transport pipe In addition, the closing plate housed inside the transport pipe is a spring force. Therefore, when the inside of the transport pipe is in a set negative pressure state, a detector that detects that the closing plate opens the outside air inlet against the force of the spring, and a detection signal of the detector And a control device for controlling the opening / closing device of the granular material storage tank.
[0005]
【The invention's effect】
The present invention has the following effects by the configuration as described above.
That is , according to the present invention, the opening / closing device operating device can be operated based on the movement of the closing plate, that is, close to the opening / closing device operating device and the detector / suction device (powder receiving side). Therefore, it is not necessary to connect the control device provided with the signal line with a signal line, so that the disadvantages of the conventional device can be solved.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
At least one, specifically, two granular material storage tanks 1 are installed, and these granular material storage tanks 1 have an inlet 2 at the upper part and an outlet 3 at the lower part.
An inlet 6 of a known opening / closing device 5 such as a rotary vane feeder is connected to the outlet 3 of each granular material storage tank 1, and this opening / closing device 5 (specifically, an opening / closing operation of a rotary impeller or the like of the opening / closing device 5). The movable member (not shown) is actuated by an actuating device 9 such as a motor.
The operating device 9 is connected by a signal line 11 to a first control device 10 having a microcomputer sequencer and the like.
[0007]
The outlet 7 of the switchgear 5 is connected to the inlet 15 of the transport pipe 14 via the branch pipe 13.
The transport pipe 14 extends to the left in FIG. 1 and rises upward, and an outside air inlet 18 is formed at the upper end of the rising portion 14a. Specifically, the outside air inlet 18 is formed by making a hole having a diameter smaller than the inner diameter of the transport pipe 14 in a plate 19 attached to the upper end of the rising portion 14a. In other words, the edge 20 that forms the outside air inlet 18 protrudes into the rising portion 14a.
[0008]
A closing plate 21 housed inside the transport pipe 14 (specifically, the rising portion 14 a) is brought into contact with the edge 20 of the outside air inlet 18 by the force of the spring 22. The closing plate 21 has a diameter smaller than the inner diameter of the transport pipe 14 (specifically, the rising portion 14a). In addition, a rod 23 is provided in a hanging shape on the lower surface of the center of the closing plate 21, and this rod 23 is fitted to a guide cylinder 24 so as to be movable up and down. The guide cylinder 24 includes at least two arms 25. It is fixed to the rising portion 14a via a ring body 26 to which the outer end is attached. The closing plate 21 opens the outside air inlet 18 against the force of the spring 22 when the inside of the transport pipe 14 is in a set negative pressure state.
[0009]
A detector 28 such as a limit switch is attached to the plate 19 with or without a bracket 29 for detecting that the closing plate 21 has opened the outside air inlet 18 against the force of the spring 22. .
[0010]
In this embodiment, a specific mechanism for detecting that the closing plate 21 opens the outside air inlet 18 against the force of the spring 22 is as follows.
When the contact of the detector 28 (biased in the direction of contacting with the closing plate 21 by a spring [not shown)] moves downward, the contact protrudes accordingly (hereinafter referred to as detector). It is possible to detect that the closing plate 21 has opened the outside air inlet 18 against the force of the spring 22.
The detector 28 is connected to the first control device 10 via the signal line 11.
The first control device 10 counts the number of “ON” signals of the detector 28 and issues an operation signal / stop signal to the operation device 9 in accordance with an operation pattern corresponding to the count number.
An example of the relationship between the number of "ON" operations of the detector 28 and the operation pattern is as follows.
(1) When the “ON” operation of the detector 28 is performed once, only the actuator 9 on the left side of FIG. 1 is operated,
(2) When the “ON” operation of the detector 28 is performed twice, only the operation device 9 on the right side of FIG. 1 is operated,
(3) When the “ON” operation of the detector 28 is performed three times, the left and right actuators 9 are operated together.
It is said.
[0011]
The outlet 16 of the transport pipe 14 is connected to an inlet 32 of a gas / powder separator 31 that also serves as a granule receiving hopper.
The gas / powder particle separator 31 has an outlet 33 at the bottom and a gas outlet 34 and the inlet 32 at the top. In the gas / powder particle separator 31, there is provided a perforated plate 35 that defines an inlet 32 and a gas outlet 34, which does not allow passage of particles and allows passage of gas.
With such a configuration, the powder particles that have entered the gas / powder separator 31 from the inlet 32 are blocked by the perforated plate 35 and do not come out of the gas outlet 34.
[0012]
The gas outlet 34 of the gas / powder separator 31 has a negative pressure in the transport pipe 14 via a conduit 38, and the gas is directed from the powder storage tank 1 to the gas / powder separator 31 in the transport pipe 14. The suction port 40 of the suction device 39 that creates the flow of the above is connected, and the exhaust port 41 of the suction device 39 is open to the atmosphere.
The suction device 39 is operated by an operation device 42 such as a motor, and this operation device 42 is connected to a second control device 43 having a microcomputer sequencer or the like via a signal line 11.
[0013]
An air inlet 46 is formed in the middle of the conduit 38, and an electromagnetic valve 47 is connected to the air inlet 46. The electromagnetic valve 47 is connected to the second control device 43 via the signal line 11.
With such a configuration, the inside of the conduit 38 can be opened to the atmosphere by opening the electromagnetic valve 47.
[0014]
A transparent cylinder 49 is connected to the outlet 33 of the gas / powder particle separator 31, and the lower end of the transparent cylinder 49 is connected to an inlet of an injection molding machine, an extrusion molding machine (not shown) or the like.
A detector 51 such as a reflective photoelectric switch that detects that the gas / powder separator 31 has become empty is opposed to the transparent tube 49. The detector 51 is connected to the second control device 43 by the signal line 11.
With this configuration, when there is no more granular material in the transparent tube 49, the detector 51 detects this and sends a detection signal to the second controller 43.
[0015]
When the second control device 43 receives the detection signal from the detector 51, the second control device 43 operates the operation device 42 and sets the electromagnetic valve 47 at a predetermined short time interval as many times as set and stored (including zero). open. When the solenoid valve 47 is opened, the atmosphere flows in from the atmosphere introduction port 46, so that the gas suction action in the vicinity of the rising portion 14a is reduced, and as a result, the outside air introduction port 18 is once opened with the operation of the suction device 39. The closed plate 21 closes the outside air inlet 18. In other words, the number of times the solenoid valve 47 is opened makes it possible to operate / determine the number of times the closing plate 21 is closed once opened, and thus the number of times the detector 28 is turned “ON”. As a result, it will be understood that the actuator 9 can be indirectly controlled by the second controller 43 which is far away and not connected by the signal line 11, considering the description in the column of paragraph 0010.
[0016]
Operation of the Embodiment of the Invention
Next, the operation of the embodiment of the invention will be described.
When there is no more granular material in the transparent tube 49, the detector 51 detects this and sends a detection signal to the second control device 43.
When the second control device 43 receives the detection signal from the detector 51, the operation device 42 is operated and the suction device 39 is operated. Further, the electromagnetic valve 47 is opened at a predetermined short time interval as many times as set and stored in the second control device 43. There is a setting state in which the solenoid valve 47 is not opened at all.
Then, the “ON” operation of the detector 28 is performed by the number of times that “1” is added to the number of times that the electromagnetic valve 47 is opened.
Thereafter, based on the number of “ON” operations of the detector 28, the first control device 10 operates the predetermined operation device 9 at a predetermined time and at a predetermined time based on the set operation pattern.
Thereby, the granular material in the predetermined granular material storage tank 1 is transported to the gas / powder particle separator 31 on the flow of gas. The gas is exhausted from the exhaust port 41 of the suction device 39, and the powder and particles are accumulated in the gas and powder separator 31.
And when predetermined time passes, the suction device 39 will stop.
[0017]
[Modifications]
A description will be given below of modifications and the like.
(1) The granular material includes powder, granular material, fine thin piece, short fiber piece and the like.
(2) The opening / closing device 5 may be a slide shutter or a valve that reciprocates to close the inlet 6 or open the inlet 6.
(3) In this embodiment, the gas / powder separator 31 also serves as a powder receiver hopper, but another powder receiver hopper at the outlet 33 of the gas / powder separator 31. May be provided. In this case, the transparent tube 49 is connected to the outlet of the granular material receiving hopper.
[Brief description of the drawings]
FIG. 1 is a system diagram of intermediate omission showing an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a portion A in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Powder storage tank 2 Inlet 3 Outlet 5 Opening and closing device 6 Inlet 7 Outlet 9 Actuator 10 First control device 11 Signal line 14a Standing part 14 Transport pipe 15 Inlet 16 Outlet 18 Outside air introduction port 20 Edge 21 Closure plate 22 Spring 28 Detector 31 Gas / Particle Separator 32 Inlet 33 Outlet 34 Gas Outlet 39 Suction Device 40 Suction Port 41 Exhaust Port 42 Actuator 43 Second Control Device

Claims (2)

A powder storage tank that has an inlet and an outlet for the powder, stores the powder, and sends the powder through the opening / closing device from the outlet ,
A powder receiving hopper located on the powder receiving side;
A transport pipe for transporting the granular material delivered from the switchgear to the granular material receiving hopper ;
A suction device having an exhaust port that is connected to the granular material receiving hopper by a conduit and creates a gas flow from the granular material storage tank toward the granular material receiving hopper and opens to the atmosphere ;
A control device for operating the suction device by detecting the absence of the granular material in the granular material receiving hopper;
A clogging plate housed in the transport pipe is brought into contact with the edge of the outside air inlet formed near the granular material storage tank in the transport pipe by the force of a spring, and the inside of the transport pipe is set. a detector for detecting that the outside air introduction port was opened only in a negative pressure state becomes against the force of said closure plate spring,
A control device for controlling an opening / closing device of the granular material storage tank based on a detection signal of the detector;
A device for transporting granular materials. A granular material storage tank for storing the granular material having an inlet and an outlet for the granular material, and sending the granular material from the outlet through an opening and closing device,
A powder receiving hopper located on the powder receiving side;
A transport pipe for transporting the granular material delivered from the switchgear to the granular material receiving hopper;
The powder receiving hopper is connected by a conduit having an air inlet, and a suction device that creates a gas flow from the powder storing tank toward the powder receiving hopper,
A valve for opening and closing the air inlet of the conduit;
A control device for detecting the absence of the granular material in the granular material receiving hopper and operating the suction device and controlling opening and closing of the valve according to an appropriate setting;
A clogging plate housed in the transport pipe is brought into contact with the edge of the outside air inlet formed near the granular material storage tank in the transport pipe by the force of a spring, and the inside of the transport pipe is set. A detector that detects that the closing plate has opened the outside air inlet against the force of the spring when it is in a negative pressure state;
A control device for controlling the opening and closing device of the granular material storage tank based on a detection signal of the detector;
A device for transporting granular materials.

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