JP2006150178A - Air injection apparatus for particulate material treatment and particulate material color sorting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To recognize an abnormality of an air system and an electric system without using a structure for moving a pressure sensor. <P>SOLUTION: An airtight tank 24 is provided between air entrances of respective power opening/closing valves 16 and a compression air source 22, and the airtight tank 24 and the compression air feeding source 22 are communicated with each other by a base side air feeding line 21. Whereas, the airtight tank 24 and each of the air entrances are communicated with each other by a leading side air feeding line 20 and a base side opening/closing valve 23 is provided on a midway of the base side air feeding line 21. A pressure detection means 25 for detecting that an air pressure in the airtight tank 24 becomes specific magnitude or less is provided. When a valve release current for open-operating a solenoid opening/closing valve 16 is emitted from a valve control apparatus 15, a current detection means 27 for detecting an amount or existence of the valve release current fed to the specific solenoid opening/closing valve 16 fed with the valve release current is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a granular material processing air jet apparatus capable of selecting a specific granular material contained in a granular material such as grain, and a granular material capable of selecting and removing a different color granular material contained in the granular material. It relates to a color sorter.

  Provided with a large number of electromagnetic on-off valves that are individually controlled to be opened and closed by a valve control device. The air outlets of these electromagnetic on-off valves communicate with air injection nozzles, and the air inlets of the electromagnetic on-off valves supply compressed air. There is a particulate color sorter that communicates with a source and that separates and removes different color particulates in a particulate group by an air flow generated by air being ejected from the air ejection nozzle ( Patent Document 1).

  In the above granular material color sorter, air may not be normally ejected from a specific air injection nozzle during the sorting process, but in such a state, it is normal among the non-defective granular materials after the sorting process. In some cases, defective granular materials that have not been sorted out are mixed.

In order to prevent this, a command is issued to the valve control device to cause the pressure sensor to face the air jets of each air jet nozzle in order and to inject compressed air from the air jets of the air jet nozzles in the face-to-face state. Techniques for fault diagnosis that have been made to develop have been developed.
This technique diagnoses that a failure has occurred in the system of the air injection nozzle by detecting that the compressed air is not injected from the air injection nozzle to which the compressed air is to be injected.

JP-A-11-90347

  The conventional failure diagnosis techniques described above require a structure for moving the pressure sensor, which makes the structure complicated and expensive, and also causes air leakage from the air passage from the compressed air supply source to the air injection nozzle. However, there is a problem that it is difficult to discriminate this, or that it is not possible to discriminate abnormal air injection from the air injection nozzle during the sorting process.

  It is an object of the present invention to provide a granular material processing air injection device and a granular material color sorter that can solve such problems without using a pressure sensor.

In order to achieve the above object, the present invention is as follows.
That is, according to the first aspect of the present invention, as described in claim 1, an air injection nozzle for blowing air toward the particulate matter is connected to each of the air outlets of the plurality of power on / off valves, An air injection apparatus for processing particulate matter in which compressed air is supplied from a compressed air supply source to an air inlet, wherein an airtight tank is provided between the air inlet of each of the power on-off valves and the compressed air source, The compressed air supply source is communicated with the original air supply line, while the airtight tank and each of the air inlets are communicated with each other through the front air supply line, and the original air supply line is opened and closed in the middle of the original air supply line. A valve is provided, and pressure detecting means for detecting that the air pressure in the airtight tank has become a specific level or less is provided.

  According to a second aspect of the present invention, an air injection nozzle is communicated with each air outlet of each of the multiple power on / off valves, and an air inlet of each of the power on / off valves is communicated with a compressed air supply source. In the particulate color sorter that sorts and removes different color particulate matter in the particulate matter group by the air flow generated by jetting air from the air jet nozzle, an air supply line connected to each of the air inlets A pressure detecting means for detecting that the air pressure in the air supply line between the original side on-off valve and each of the air inlets is less than a specific level is provided on the way. It is provided.

  According to a third aspect of the present invention, an air injection nozzle is communicated with each air outlet of a large number of power on / off valves, and an air inlet of each of the power on / off valves is communicated with a compressed air supply source. In the particulate color sorter, in which the different color particulate matter in the particulate matter group is sorted and removed by the air flow generated by the air jetting from the air jet nozzle, the air inlet and the compressed air of each of the power on-off valves An airtight tank is provided between the air supply tank and the airtight tank and the compressed air supply source are communicated with each other through the original air supply line, while the airtight tank and each of the air inlets are communicated with each other through the front air supply line. In addition, an original opening / closing valve is provided in the middle of the original air supply line, and pressure detecting means for detecting that the air pressure in the airtight tank has become a specific level or less is provided. And wherein the door.

  According to a fourth aspect of the present invention, there is provided a plurality of electromagnetic on-off valves for individually supplying compressed air to a plurality of air injection nozzles, and a valve control device for controlling the on-off of the electromagnetic on-off valves. In the particulate color sorter, when a signal for opening the electromagnetic on-off valve is input to the valve control device, a valve opening current supplied to the specific electromagnetic on-off valve related to the signal is detected. The present invention is characterized in that an intended current detecting means is provided.

  According to the present invention described above, the following effects can be obtained, that is, the occurrence of a situation in which air is not normally ejected from a specific air ejection nozzle during the sorting process. This can be solved without using the conventional structure to be moved, and the structure can be simplified and inexpensive.

  According to the first, second, or third aspect of the invention, even if a relatively small amount of air leaks from the air passage from the compressed air supply source to the air injection nozzle, it can be determined at any time, and the An air leak can be dealt with reliably.

  According to the third aspect of the present invention, since only the pressure drop in the airtight tank is detected by the pressure detecting means, air leakage from the vent pipe from the airtight tank to each electromagnetic on-off valve can be detected. In addition, since the airtight tank functions as an air reservoir, the pressure of the compressed air supplied to each air injection nozzle can be equalized to improve the selection accuracy.

  According to the invention described in claim 4, even during the sorting process, it is possible to quickly determine an abnormality in the electrical system of the electromagnetic on-off valve, and thereby the non-defective granular material after the sorting process due to the abnormality. It is possible to prevent a situation in which defective granular materials are mixed in a large amount.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an outline of a granular color sorter according to an embodiment of the present invention, FIG. 2 is a rear view showing a nozzle assembly, a power stop valve, a vent pipe and the like in the sorter, and FIG. FIG. 4 is a partial rear view of the nozzle assembly, and FIG. 5 is an arrangement state of air holes and air inlets on a longitudinal front surface including an air injection nozzle in the sorter. FIG. 6 is a schematic diagram showing current detection means in the sorter. FIG. 7 is a flow chart of the sorter, an air injection nozzle, and different color particles. It is the figure which looked at the thing from the front.

  As shown in FIG. 1, the color sorter according to the present invention removes different-colored granular materials w1 such as pebbles, metal pieces, glass pieces or defective quality granular materials mixed in granular materials w such as grains. Therefore, the sorting unit 100 is formed on the body frame, and a raw material tank 101, a non-defective product tank 102, and a defective product tank 103 are provided at appropriate locations.

  The sorting unit 100 includes a feeder 1 that quantitatively feeds the granular material w, a flowing-down basket 2 that is supplied with the granular material w from the feeder 1, and a different-colored granular material w1 from the granular material w group that has dropped from the flowing-down basket 2. An optical sorting means 3 for sorting and removing, and a sorting and collecting unit 4 including a non-defective product storage unit 4a and a defective product storage unit 4b are provided.

  The feeder 1 includes a hopper 5 that is fixed to the body frame and accommodates the granular material w, a trough 6 that is disposed under the hopper 5 and supports the granular material w on the upper surface, and an electromagnetic driving means 7 that vibrates the trough 6. At this time, the trough 6 changes the amplitude and period of vibration applied from the electromagnetic driving means 7 to change the carrying force generated by itself, and the electromagnetic driving means 7 is the optical sorting means 3. The flow rate control device 8 automatically controls the vibration amplitude and period of its own output section so that a good sorting accuracy can be obtained.

  The flow-down rod 2 is formed with a groove forming a straight flow-down guide surface 2a on the upper surface and is supported in an inclined manner by the machine body frame, and the flow-down guide surface 2a guides the granular material w supplied to the guide start end thereof. It is supposed to be dropped so as to fly downward from the lower end of the.

  The optical sorting unit 3 includes a different color particle presence detecting unit 9 and an external force applying unit 10. The different color particle presence detecting means 9 is provided with an area sensor 11 at one of the opposed positions sandwiching a normal movement locus a1 of the granular material w flying from the lower end of the flow guide surface 2a and falling, and a background face body 12 at the other. Provide two or more sets of essential parts for selection, and provide illumination lamps 13 on both the side face body 12 side and the area sensor 11 side, and the area sensors 11 and 11 can change the color of the granular material w flying on the normal movement locus a1. When the change exceeds a certain level, the light quantity comparison means 14 recognizes the granular material w to be monitored as a different color granular material w1 and issues a detection signal.

  As shown in FIG. 2, the external force applying means 10 is a flat square corresponding to each of the valve control device 15, a number of electromagnetic on-off valves 16 (power on-off valves) that are controlled to open and close, and the electromagnetic on-off valves 16. A large number of air injection nozzles 17 arranged in a straight line in the horizontal left-right direction f2 (width direction of the flow-down guide surface 2a), and nozzles corresponding to the outlets of the electromagnetic on-off valves 16 A flexible resin-made front air supply line 20 that communicates with the air inlet 19 of the assembly 18, a source-side air supply line 21 for supplying compressed air to each electromagnetic on-off valve 16, A compressed air source 22 that is connected to the side air supply line 21 and supplies compressed air to the line 21; a source side electromagnetic on-off valve 23 provided in the middle of the source side air supply line 21; And each electromagnetic on-off valve 16 Have been made and that a gas-tight tank 24 provided in the middle of the stage-side air supply line 21 between.

  Pressure detecting means 25 is provided in the vicinity of the airtight tank 24, and an abnormal signal is generated when the air pressure in the airtight tank 24 becomes a predetermined value or less.

  As shown in FIGS. 3 and 4, the nozzle assembly 18 includes a front surface portion 18a, an upper surface portion 18b, a lower surface portion 18c and a back surface portion 18d, and an inclined surface portion 18e connecting the lower surface portion 18c and the back surface portion 18d. It is made into the rod-shaped body long in the left-right direction f2. A large number of air injection nozzles 17 are formed at two positions f2 in the left-right direction above the front surface portion 18a. As shown by A, B, and C in FIG. Formed on the surfaces b1, b2, and b3 is a front vent 26a extending obliquely downward from the air injection nozzle 17 on the vertical surfaces b1, b2, and b3. And the air inflow port 19 is formed in the specific place which is on any one of the lower surface part 18c place, the back surface part 18d place, or the inclined surface part 18e place on each longitudinally-oriented longitudinal surface b1, b2, b3. Among these air inlets 19, the air inlets 19 and 19 on two longitudinally adjacent vertical surfaces adjacent in the left-right direction f2 are at two different locations of the lower surface portion 18c, the back surface portion 18d, and the inclined surface portion 18e. It is formed in a relative arrangement. The air inlet 19 and the rear end p1 of the front-side vent hole 26a in each of the longitudinal surfaces b1, b2, and b3 facing in the front-rear direction are communicated with each other through a straight original-side vent hole 26b.

  The air inlet 19 and the vent holes 26a, 26b shown in FIGS. 2 to 5 are arranged in a front-rear direction vertical surface indicated by reference numeral b1, a front-rear direction vertical surface indicated by reference numeral b2, and a front-rear direction vertical surface indicated by reference numeral b3. The relative arrangement is repeated in this order, but is not limited to this. In addition, the air inlet 19 is communicated with the rear ends of the three original vents 26b having different inclination directions when the nozzle assembly 18 is viewed from the side, but is not limited thereto. When the nozzle assembly 18 is viewed from the side, four or more original side vent holes 26b having different inclination directions are formed, and may be communicated with the respective rear ends of the original side vent holes 26b. Absent.

  Further, the valve controller 15 detects that one or more different color particles w1 are detected and a presence detection signal is input, and a specific adjustment time to be described later elapses for each different color particle w1. Elapsed time until the specified adjustment time elapses, and a valve opening current for opening the electromagnetic on-off valve 16 corresponding to the position of each of the different color granular materials w1 related to the detection is issued It has been.

  Here, the specific adjustment time is specified in advance as an elapsed time from the time when the different color particle presence detection means 9 detects the presence of the different color granular material w1 to the time when the different color granular material w1 falls to the specific drop position d1. This is the time obtained by subtracting the air flow arrival delay time, which will be described later, from the granular material arrival delay time. At this time, the granular material arrival delay time was experimentally obtained for a group of granular materials w as objects to be processed. It may be an average time, or may be a time unique to each granular material w obtained predictively for each corresponding different colored granular material w1 from the falling speed of each actually detected different colored granular material w1. May be. The air flow arrival delay time is the time when a valve opening current for opening the electromagnetic on-off valve 16 is issued from the valve control device 15, and the compressed air is discharged from the electromagnetic on-off valve 15 opened by the current to the corresponding air injection nozzle. 16 is an elapsed time from when the air flow is supplied to the injection nozzle 16 and the air flow generated by the injection reaches the specific drop position d1.

  Current detection means 27 for detecting the amount of current flowing through the electromagnetic coil of each electromagnetic switching valve 16 is provided in the middle of the output circuit in which the valve control device 15 and each electromagnetic switching valve 16 are coupled. Referring also to FIG. 6, the current detection means 27 includes a drive timing circuit 28, a transistor (may be an FET or the like) 29 as a drive element, an amplifier 30, a pass / fail judgment circuit 31, and a resistor 32. The drive timing circuit 28 is configured to detect when a valve opening current is issued from the valve control device 15 to the electromagnetic coil 16a of the electromagnetic on-off valve 16, and to input a synchronization signal to the pass / fail judgment circuit 31. The transistor 29 supplies the valve opening current to the electromagnetic coil 16a through the collector 29b in relation to the supply of the valve opening current through the drive timing circuit 28 to the base 29a, while being proportional to the amount of current flowing through the collector 29b. The generated voltage is generated in the emitter 29c. The amplifier 20 amplifies the voltage of the emitter 29c and inputs the amplified voltage to the pass / fail judgment circuit 31, and the pass / fail judgment circuit 31 receives the synchronization signal input from the drive timing circuit 28, so that the valve opening current is supplied to the electromagnetic coil 16a. The amount of current flowing in the supplied period is determined by the voltage input from the amplifier 30. The pass / fail judgment circuit 31 may simply detect the presence / absence of the valve opening current.

  When a valve opening current is generated from the valve control device 15, the electromagnetic opening / closing valve 16 corresponding to the different color granular material w1 detected by the different color particle presence detecting means 9 is opened, and the position corresponding to the opening operation is changed. The compressed air is ejected from the air injection nozzle 17, and the air flow generated by the ejection is about the above-mentioned from the time when the presence detection signal of the specific different color granular material w <b> 1 by the different color particle presence detection means 9 is input to the valve control device 15. When the granular material arrival delay time has elapsed, the specific falling position d1 on the normal movement trajectory a1 that is the falling trajectory of the specific different color granular material w1 related to the detection by the different color particle presence detecting means 9 is reached.

  The separation collection unit 4 accommodates the granular material w that has fallen from the lower end of the flow-down basket 2 and passed through the optical sorting means 3, and the non-defective product storage unit 4a passes through the normal movement locus a1 and reaches the non-defective product receiving port 4a1. The defective product receiving portion 4b is configured to receive the defective product receiving portion 4b by flying upward and outward from the normal movement locus a1 by the air flow ejected from the air injection nozzle 17, and passing through the upward movement locus a2. The granular material w having reached 4b1 is accommodated.

  Further, the granular material supply path 32 extends from the raw material tank 101 to move the granular material w in the raw material tank 101 into the hopper 5, and the granular material transfer path 33 extends from the non-defective product containing portion 4 a. The granular material w in the non-defective product storage section 4a is transferred into the non-defective product tank 102, and the granular material transfer path 34 is extended from the defective product storage section 4b, and the defective product storage section 4b. The granular material w inside is transferred into the defective product tank 103.

  A shutter device 35 is provided below the detection range of the different color granular material w1 by the different color granular material detection means 9 so that the shutter 35b is moved back and forth in the specific direction f3 by the operation of the drive device 35a. When the shutter 35b is in the retracted state as shown by the solid line in FIG. 1, the shutter device 35 has no effect on the flow of the granular material w falling from the flow-down rod 2, while the shutter 35b is in FIG. When the advancing state as indicated by the imaginary line e is established, all of the granular material w that falls from the flow-down rod 2 is dropped into the defective product accommodating portion 4b.

  At this time, the drive device 35a may be any device such as a fluid pressure cylinder device, an electric motor, or a solenoid, and its operation is controlled by the shutter control device 36. The shutter control device 36 receives an abnormal signal from the pressure detection means 25 or the current detection means 27 in relation to the occurrence of a failure in the area sensor 11, the illumination lamp 13, the electromagnetic bulb 16, or the like that affects the selection of the granular material w1. In response to this input, the driving device 35a is operated to bring the shutter 35b into the advanced state. On the other hand, when the portion that affects the sorting of the granular material w is operating normally, the driving device 35a is used to hold the shutter 35b in the retracted state. It is supposed to operate.

  In the above configuration, the part related to ejecting air from the air jet nozzle 17 constitutes the particulate matter processing air jet apparatus according to the first aspect of the present invention.

Next, a usage example and operation when the grain which is the granular material w is selected using the above-described color sorter will be described.
The grains w and the like stored in the raw material tank 101 are supplied into the hopper 5 through the granular material supply path 32. At this time, the grains w and the like are always maintained at a constant level in the hopper 5. Is preferred. Then, the original side electromagnetic opening / closing valve 23 is opened.

Under this condition, the grain w or the like in the hopper 5 falls on the bottom surface of the trough 6 through the exit passage, and on the other hand, the trough 6 is vibrated back and forth and up and down by the operation of the electromagnetic drive means 7. The grains w and the like that have fallen on the bottom surface of the trough 6 are gradually fed to the front f10 and supplied so as to fall from the sending portion 6a to the guide start end of the flow guide surface 2a of the flow tub 2.
At this time, the flow rate of the grain w or the like from the feeder 1 to the downstream ridge 2 is automatically adjusted to a specific size that provides good sorting performance by the control operation of the flow rate control device 8.

  On the flow guide surface 2a of the flow rod 2, after the grain w or the like slides linearly in a single layer state within a specific width and reaches the lower end of the flow rod 2, the flow guide surface 2a is It falls while flying on the normal movement locus a1 extended downward. If the falling grain w or the like is a non-defective grain w in this way, this reaches the granular object imaging position g of the area sensors 11 and 11, and the area sensor 11 and 11 is exposed to light from the illumination lamp 13. Even if the area sensors 11 and 11 receive the transmitted light or reflected light from the grain w, the different color grain presence detecting means 9 does not detect the different color granular substance w1, The grain w1 falls on the normal movement trajectory a1 as it is, and is accommodated in the non-defective product accommodating portion 4a through the non-defective product receiving port 4b1.

  On the other hand, when the falling grain w or the like is a mixture of pebbles, metal pieces, or different-colored granular material w1 such as poor quality grain as shown in FIG. The light receiving pixels at specific positions of the area sensors 11 and 11 that have received the transmitted light and reflected light from the different color granular material w1 sense a light amount change of a certain level or more. The presence of the granular material w1 is detected and a detection signal is issued, and this detection signal is input to the valve control device 15.

  The grains and the like that have fallen from the downfall 2 reach the relatively wide granular object imaging range g of the area sensors 11 and 11, and the grains w and the like that are falling in the granular object imaging range g move here. During the period, the light-receiving pixel of the area sensor 11 senses a change in the amount of light of a certain degree or more related to the different color granular material w1 when the grain w or the like includes the different color granular material w1, When the different color granular material w1 reaches the detection position g1, a presence detection signal is output.

  The presence detection signal is input to the valve control device 15. In this connection, the valve control means 15 counts the elapsed time from the time when the presence detection signal is input from the different color particle presence detection means 9, When the specific adjustment time has elapsed, a valve opening current for causing the corresponding electromagnetic on-off valve 16 to open is continuously issued for a predetermined very short specific time.

  The electromagnetic on / off valve 16 supplied with a current from the valve control device 15 is immediately opened by exciting the electromagnetic coil 16a, and passes through the corresponding front air supply line 20, so that the compressed air source 21 has an inside of the airtight tank 24. The compressed air sent to the air flow is caused to flow to the corresponding air injection nozzle 17, and the air injection nozzle 17 instantaneously ejects the compressed air toward the specific drop position d <b> 1. The air flow caused by the compressed air thus ejected reaches the specific drop position d1 after the air flow arrival delay time has elapsed from the time when the valve opening current is generated from the valve control device 15. At this time, since the internal volume and the total length of the air passages from the air outlets of the electromagnetic on-off valves 16 to the corresponding air injection nozzles 17 are substantially the same, the air flow arrival delay for the air injection nozzles 17 is the same. The time is approximately the same. On the other hand, each of the different colored granular materials w1 related to the detection by the different colored particle presence detecting means 9 arrives at the specific drop position d1 after the granular material arrival delay time has elapsed from the respective detection time points.

  Therefore, each of the different color particles w1 detected by the different color particle presence detecting means 9 is generated by the air injected from the corresponding air injection nozzle 17 even if they are present at various positions in the left-right direction f2. An external force is applied at an accurate timing by the air flow, and the normal movement trajectory a1 is repelled upward and outward, sorted and removed from the non-defective grain w, etc., flies over the upward movement trajectory a2, and receives defective products. It falls into the defective product storage portion 4b through the inlet 4b1.

  Thus, when each of the different color granular materials w1 detected by the different color particle presence detecting means 9 is repelled by the air flow, the non-defective grain w existing near each different color granular material w1 is also repelled together. However, since the air flow accurately applies an external force to each different color granular material w1, the amount of good grains w falling into the defective product storage portion 4b is small. It will be a thing.

  As a result of the sorting process as described above, the grains w and the like accommodated in the non-defective product storage section 4a are transferred into the non-defective product tank 102 through the granular material transfer path 33 and stored in the defective product storage section 4b. The different color granular material w1 and the non-defective grain w are transferred into the defective product tank 103 through the granular material transfer path 34, and the grain w etc. in the defective product tank 103 is re-colored again as necessary. The sorting process is performed.

During the sorting process as described above, when an abnormality occurs in the electrical system related to the electromagnetic on-off valve 16 and sufficient current does not flow through the electromagnetic coil 16a, the electromagnetic on-off valve 16 does not properly open and the air injection nozzle 17 However, in order to prepare for the occurrence of such a situation, the pass / fail judgment circuit 31 of the current detection means 27 is determined in advance as the voltage value supplied from the amplifier 30. Compared with a reference voltage value for proper operation, an abnormal signal is issued when the former is smaller than the latter.
When the pass / fail judgment circuit 31 determines whether or not the valve opening current is present, the valve opening current exists but cannot be determined until the amount is insufficient, but it is still useful in practice.

  The abnormal signal is input to the shutter control device 36, and the shutter control device 36 immediately activates the driving device 35a to close the shutter 35b, whereby all of the granular material w flowing down from the flow-down rod 2 is inoperable. The progress of a situation in which the different color granular material falls into the non-defective product container 4a through the non-defective product inlet 4b1 and falls into the defective product container 4b is quickly avoided.

Next, the case of diagnosing air leakage from the air system from the original side electromagnetic opening / closing valve 23 to each electromagnetic opening / closing valve 16 will be described.
When the supply of grain as a raw material is temporarily stopped (during operation standby) such as during cleaning, the valve opening current is not supplied from the valve controller 15 to the electromagnetic switch 23 on the original side. The on-off valves 23 are opened, and all the electromagnetic on-off valves 16 are closed because no valve opening current is supplied to all of the electromagnetic on-off valves 16. In this state, compressed air is supplied into the airtight tank 24 through the original side electromagnetic opening / closing valve 23.

  Under this state, the original side electromagnetic opening / closing valve 23 is closed and the air passage portion from the original side electromagnetic opening / closing valve 23 to each electromagnetic opening / closing valve 16 is sealed in a state filled with compressed air. It becomes a state. Now, if an air leak occurs in the air passage portion, the pressure of the compressed air in the airtight tank 24 drops below a predetermined value with the passage of time, and the pressure detecting means 25 generates an abnormal signal. .

  The abnormal signal is input to the shutter control device 36, and the shutter control device 36 immediately activates the driving device 35a to close the shutter 35b, whereby all of the granular material w that flows down from the flow-down rod 2 is inoperable. The progress of a situation in which the different color granular material w1 falls into the non-defective product receiving portion 4b through the non-defective product receiving port 4b1 and is mixed into the non-defective product containing portion 4a due to the air leakage of the air passage portion is quickly avoided.

It is a side view which shows the outline | summary of the granular material color sorter | selector which concerns on the Example of this invention. It is a rear view which shows the nozzle assembly, the power stop valve, the vent pipe, etc. in the said sorter. It is the figure which looked at the said nozzle assembly from diagonally downward. It is a partial rear view of the nozzle assembly. It is the figure which looked at the longitudinally facing surface b1, b2, b3 of the said nozzle assembly from the side. It is a schematic diagram which shows the electric current detection means in the said sorter. It is the figure which looked at the falling soot, the air injection nozzle, and a different color granular material in the said sorter from the front.

Explanation of symbols

15 Valve control device 16 Electromagnetic on-off valve (power on-off valve)
17 Air injection nozzle 20 Front air supply line 21 Original air supply line 22 Compressed air supply source 23 Original electromagnetic on-off valve (original on-off valve)
24 Airtight tank 25 Pressure detection means 27 Current detection means w Granules w1 Different color granules

Claims (4)

  An air injection nozzle for blowing air toward the granular material is connected to each of the air outlets of the multiple power on / off valves, and the granular material is supplied with compressed air from the compressed air supply source to the air inlet of each of the power on / off valves. In the processing air injection device, an airtight tank is provided between an air inlet of each of the power on-off valves and the compressed air source, and the airtight tank and the compressed air supply source are communicated with each other by an original air supply line. Then, the airtight tank and each of the air inlets are communicated with each other by a front air supply line, and an original on-off valve is provided in the middle of the original air supply line, and the air pressure in the airtight tank has a specific magnitude. A particulate matter processing air injection apparatus comprising pressure detection means for detecting that the following has occurred.   An air injection nozzle is communicated with each air outlet of a number of power on / off valves, and an air inlet of each of the power on / off valves is communicated with a compressed air supply source, and air is generated from the air injection nozzles. In a granular color sorter that sorts and removes different color granular materials in a granular material group by an air flow, an original opening / closing valve is provided in the middle of an air supply line communicating with each of the air inlets. A granular material color sorter provided with pressure detecting means for detecting that the air pressure in the air supply line between the air inlet and each of the air inlets is below a specific level.   An air injection nozzle is communicated with each air outlet of a number of power on / off valves, and an air inlet of each of the power on / off valves is communicated with a compressed air supply source, and air is generated from the air injection nozzles. In a granular color sorter that sorts and removes different color granular materials in a granular material group by an air flow, an airtight tank is provided between an air inlet of each of the power on-off valves and the compressed air source, and the airtight tank The compressed air supply source is communicated with the original air supply line, while the airtight tank and each of the air inlets are communicated with each other through the front air supply line, and the original air supply line is opened and closed in the middle of the original air supply line. A particulate color sorter characterized by comprising a valve and pressure detecting means for detecting that the air pressure in the airtight tank is below a specific level.   In a particulate color sorter comprising a number of electromagnetic on-off valves for individually supplying compressed air to a number of air injection nozzles and a valve control device for controlling the opening / closing of the electromagnetic on-off valves, the valve control device includes the valve When a signal for opening the electromagnetic on-off valve is input, current detection means is provided which detects a valve opening current supplied to the specific electromagnetic on-off valve related to the signal. Granular color sorter.

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