CN107479488A - Ore storage bin automatic control system - Google Patents
Ore storage bin automatic control system Download PDFInfo
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- CN107479488A CN107479488A CN201710866834.4A CN201710866834A CN107479488A CN 107479488 A CN107479488 A CN 107479488A CN 201710866834 A CN201710866834 A CN 201710866834A CN 107479488 A CN107479488 A CN 107479488A
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- electrically connected
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- capital
- plc
- control module
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
- B65G67/06—Feeding articles or materials from bunkers or tunnels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
- B65G69/0483—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials with electric or magnetic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15069—Use of function modules with timer, counter, relay functions and I-O
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The present invention relates to mineral transportation art, more particularly to ore storage bin automatic control system.Its technical scheme is：Ore storage bin automatic control system, including industrial computer, industrial computer is electrically connected with PLC, and PLC is electrically connected with Interleaved control module, Interleaved control module is electrically connected with some solenoid directional control valves, the hydraulic cylinder that the open-and-close mechanism that solenoid directional control valve is connected with the discharge port for controlling ore storage bin opens and closes.A kind of ore storage bin automatic control system of multiple discharge ports alternating blowing of present invention offer controllable ore storage bin, solve the problems, such as that vehicle has received large impact or rollover when ore storage bin blowing is uneven.
Description
Technical field
The present invention relates to mineral transportation art, more particularly to ore storage bin automatic control system.
Background technology
Belt Conveying mode is usually taken in traditional bulk material entrucking, and its major defect is：Firstth, transfer efficiency is low,
Separate unit conveyer takes long enough just fill a car.Secondth, can not solve the problems, such as viscous material entrucking, Belt Conveying is usual
Suitable bulk does not have sticking material, can cause roller and belt slippage for the stronger material of viscosity, conveyer can not be normal
Operation.3rd, feed bin must make cone bucket, and due to being single-point type discharge method, feed bin, which can only make cone bucket, could meet needs,
It will form that cone bucket portion is hollow for viscous material, situation about can not discharge often occurs.4th, entrucking is uneven, is being transported to
A pagoda shape stockpiling area is formed when inside lorry, therefore can not monitor whether to fill automatically, charge weight can only be estimated probably,
And system is simple and crude, it is impossible to efficiently automatically controls.
Number of patent application is that CN201220687133.7 utility model patent discloses a kind of module combined type feed bin, is wrapped
Storage bin and fixed mount are included, described storage bin is placed on fixed mount, and the side of storage bin is provided with shunting door.The present invention uses steel
The funneling ore storage bin of structure rectangle, is advantageous to the discharge of mineral aggregate, is not easily blocked gape, and multiple ore storage bins are set according to the demand of storage ore deposit
Parallel combination, mineral aggregate is diverted to other ore storage bins by an ore storage bin using difference in height, without extra power demand, and in shunting door
And the position of ore impact is often subject to according to it after fixed dam and sets stiffened panel to increase its anti-impact force.Structure of the present invention
Simply, simple installation, it is stable and reliable in work, be advantageous to the entrucking transport of automobile, reduce and load cost, improve production efficiency.
Above-mentioned feed bin is opened multiple discharge ports, automobile is by fast simultaneously during entrucking is carried out to haulage vehicle
The impact of fast blanking is larger, easily causes vehicle damage.Discharge port equably can not carry out entrucking to vehicle, when railway carriage side fills
When entering excessive mineral aggregate, easily there is rollover situation in vehicle.Therefore, it is necessary to make ore storage bin enter line misregistration blowing to vehicle, just can guarantee that
Uniform entrucking, and vehicle is avoided by large impact.At present, also multiple discharge ports of ore storage bin are not handed in the prior art
For the system of opening control.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of ore deposit of multiple discharge ports alternating blowing of controllable ore storage bin
Storehouse automatic control system, solve the problems, such as that vehicle has received large impact or rollover when ore storage bin blowing is uneven.
To solve above-mentioned technical problem, the present invention uses following technical scheme：
Ore storage bin automatic control system, including industrial computer, industrial computer are electrically connected with PLC, and PLC is electrically connected with
Interleaved control module, Interleaved control module are electrically connected with some solenoid directional control valves；It is provided with out on some discharge ports of ore storage bin
Mechanism is closed, some hydraulic cylinders are installed on ore storage bin, hydraulic cylinder is connected with open-and-close mechanism, and solenoid directional control valve is connected with hydraulic cylinder.
As the preferred scheme of the present invention, the Interleaved control module includes the time relay, and the time relay is controlled with PLC
Device processed electrically connects, and is electrically connected with first switch on the normally opened contact of the time relay, first switch is changed with a portion electromagnetism
Electrically connected to the positive stroke contact of valve；Be electrically connected with second switch on the normally-closed contact of the time relay, second switch with it is another
The positive stroke contact electrical connection of part solenoid directional control valve, the closing time of the time relay are identical with turn-off time；Electromagnetic switch
The revesal contact of valve electrically connects with PLC.
As the preferred scheme of the present invention, the Interleaved control module includes the time relay, and the time relay is controlled with PLC
Device processed electrically connects, and is electrically connected with first switch on the normally opened contact of the time relay, is electrically connected on the normally-closed contact of the time relay
It is connected to second switch；Control module of buying securities with all one's capital, the output of first switch are respectively connected with the positive stroke contact of some solenoid directional control valves
End electrically connects with a portion control module of buying securities with all one's capital, and second switch and another part control module of buying securities with all one's capital electrically connect；Buy securities with all one's capital control
Molding block is electrically connected to form feedback circuit with PLC, and the revesal contact of solenoid directional control valve electrically connects with PLC,
The closing time of the time relay is identical with turn-off time.
As the preferred scheme of the present invention, be electrically connected with the PLC for detect vehicle whether in place red
Outside line sensor, be electrically connected with PLC for prompt vehicle whether voice signal device and optical signal exchanger in place.
As the preferred scheme of the present invention, the control module of buying securities with all one's capital includes some radar range finding sensors, radar range finding
Sensor is electrically connected to form feedback circuit with PLC, and a radar range finding sensor, thunder are mounted on each discharge port
Electromagnetic relay is electrically connected with up to distance measuring sensor, electromagnetic relay is electrically connected with switch of buying securities with all one's capital, and is electrically connected with first switch
One end of the switch of buying securities with all one's capital for control module of buying securities with all one's capital electrically connects with first switch, the control module of buying securities with all one's capital electrically connected with second switch
Buy securities with all one's capital one end of switch electrically connects with second switch, and the other end for switch of buying securities with all one's capital and the positive stroke contact of solenoid directional control valve are electrically connected
Connect.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, Interleaved control module of the invention can control multiple foldings staggeredly to open, then the discharge port one of part diverse location
Rising can make in railway carriage that mineral are more uniform when opening, and avoid vehicle from toppling over.Dislocation is opened multiple open-and-close mechanisms and is also avoided that simultaneously
The problem of car body is by large impact when opening whole open-and-close mechanisms.To sum up, the present invention can guarantee that charging is uniform, avoid car body by
Cross large impact or inclination.
2nd, when vehicle in place after, the contacting of PLC Connection Time relay.The closing time of the time relay
Identical with turn-off time, then first switch is alternately connected with second switch.After solenoid directional control valve is connected, hydraulic cylinder positive action,
The open-and-close mechanism of the position is opened.After buying securities with all one's capital, PLC directly controls solenoid directional control valve counteragent, the work of hydraulic cylinder
Stopper rod is stretched out, and the open-and-close mechanism at the position is closed.Therefore, two groups of discharge ports can be opened alternately, each discharge port in single group discharge port
Charging is evenly distributed, then mineral can be evenly distributed in railway carriage, avoids vehicle from producing inclination or the situation by large impact.
3rd, after the present invention sets control module of buying securities with all one's capital, the control module of buying securities with all one's capital in first switch or second switch is not detected by
When the position is bought securities with all one's capital, the solenoid directional control valve on the circuit is connected, hydraulic cylinder positive action, and the open-and-close mechanism of the position is opened.When
When position where control module of buying securities with all one's capital detects is bought securities with all one's capital, circuit disconnects where control module of buying securities with all one's capital, and control module of buying securities with all one's capital will
Signal of buying securities with all one's capital feeds back to PLC, and PLC directly controls solenoid directional control valve counteragent, and the piston rod of hydraulic cylinder is stretched
Go out, the open-and-close mechanism at the position is closed.Therefore, two groups of discharge ports can be opened alternately, each discharge port charging point in single group discharge port
Cloth is uniform, then mineral can be evenly distributed in railway carriage, avoids vehicle from producing inclination or the situation by large impact.
4th, after infrared ray sensor detects vehicle in place, PLC controls voice signal device and optical signal exchanger
Signal condition change, driver vehicle is reminded in place with this, also reminds other vehicles can not to enter the parking stall.
5th, when radar range finding sensor, which detects, buys securities with all one's capital, electromagnetic relay action, buy securities with all one's capital and switch off, then electromagnetic switch
Valve stops positive action.The radar range finding sensor signal that will buy securities with all one's capital feeds back to PLC, PLC control electromagnetic switch
Valve counteragent, then open-and-close mechanism discharge port is closed.The present invention can close discharge port automatically when buying securities with all one's capital, and reduce artificial behaviour
Make, avoid the overladen situation of mineral.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the invention including buying securities with all one's capital during control module；
Fig. 3 is the local structural graph of ore storage bin；
Fig. 4 is the top view of ore storage bin partial structurtes.
In figure, 1- ore storage bins, 2- Hubei Province formula draw valve, 3- hydraulic cylinders, 11- control ore storage bins, 21- rotational valve plates, 22- gears.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Embodiment one
Ore storage bin automatic control system, including industrial computer, industrial computer are electrically connected with PLC, and PLC is electrically connected with
Interleaved control module, Interleaved control module are electrically connected with some solenoid directional control valves, and solenoid directional control valve is connected with for controlling ore storage bin 1
Discharge port 11 on open-and-close mechanism 2 open and close hydraulic cylinder 3.
Open-and-close mechanism 2 is Hubei Province formula draw valve, and Hubei Province formula draw valve 2 includes two groups of rotational valve plates 21, and two groups of rotational valve plates 21 are equal
It is be hinged with ore storage bin 1, it is connected with gear 22 on rotational valve plate 21, the gear 22 on two groups of rotational valve plates 21 engages, and one of which turns
The dynamic one end of valve plate 21 away from gear 22 and the piston rod of hydraulic cylinder 3 are hinged.Two groups of rotational valve plates 21 are mutual in two groups of teeth wheel 22
Rotated opposite to each other in the case of engagement, the discharge port 11 is opened.Hydraulic cylinder 3 is controlled by controlling the actuation time of hydraulic cylinder 3
Elongation, so as to control the opening degree of discharge port 11.Hubei Province formula draw valve can guarantee that the accurate folding of discharge port 11, and opening degree is easy
In adjustment.
The Interleaved control module of the present invention can control multiple foldings staggeredly to open, then the discharge port 11 1 of part diverse location
Rising can make in railway carriage that mineral are more uniform when opening, and avoid vehicle from toppling over.Dislocation is opened multiple open-and-close mechanisms 2 and is also avoided that simultaneously
The problem of car body is by large impact when opening whole open-and-close mechanisms 2.To sum up, the present invention can guarantee that charging is uniform, avoid car body
Large impact or inclination are received.
For example, the quantity of discharge port 11 is six, six discharge ports 11 are set in two rows, the both ends of first row discharge port 11
Control module of buying securities with all one's capital in the middle part of control module of buying securities with all one's capital and second row electrically connects with first switch；The both ends of second row discharge port 11
Control module of buying securities with all one's capital in the middle part of control module of buying securities with all one's capital and first row electrically connects with second switch.First switch controls first row two
Buying securities with all one's capital in the middle part of buy securities with all one's capital control module and the second row at end while acts control module, and second switch controls expiring for second row both ends
Buying securities with all one's capital in the middle part of storehouse control module and first row while acts control module, then every time action when, open discharge port 11 is uniform
Distribution, ensure that ore drawing also more uniformly, avoids car body from producing inclined situation due to being under pressure uneven.
Embodiment two
On the basis of embodiment one, the Interleaved control module includes the time relay, and the time relay controls with PLC
Device is electrically connected, and first switch, first switch and a portion electromagnetic switch are electrically connected with the normally opened contact of the time relay
The positive stroke contact electrical connection of valve；Second switch, second switch and another portion are electrically connected with the normally-closed contact of the time relay
The positive stroke contact of solenoid directional control valve is divided to electrically connect, the closing time of the time relay is identical with turn-off time；Solenoid directional control valve
Revesal contact electrically connected with PLC.
When vehicle in place after, the contacting of PLC Connection Time relay.The closing time of the time relay and
Turn-off time is identical, then first switch is alternately connected with second switch.After solenoid directional control valve is connected, the positive action of hydraulic cylinder 3 should
The open-and-close mechanism 2 of position is opened.After buying securities with all one's capital, PLC directly controls solenoid directional control valve counteragent, the work of hydraulic cylinder 3
Stopper rod is stretched out, and the open-and-close mechanism 2 at the position is closed.Therefore, two groups of discharge ports 11 can be opened alternately, respectively be unloaded in single group discharge port 11
The charging of material mouth 11 is evenly distributed, then mineral can be evenly distributed in railway carriage, is avoided vehicle from producing and is tilted or by large impact
Situation.
Embodiment three
On the basis of embodiment one or embodiment two, the Interleaved control module includes the time relay, time relay
Device is electrically connected with PLC, and first switch is electrically connected with the normally opened contact of the time relay, and the normally closed of the time relay is touched
Second switch is electrically connected with point；Control module of buying securities with all one's capital is respectively connected with the positive stroke contact of some solenoid directional control valves, first opens
The output end of pass and a portion control module of buying securities with all one's capital electrically connect, and second switch and another part control module of buying securities with all one's capital are electrically connected
Connect；Control module of buying securities with all one's capital is electrically connected to form feedback circuit with PLC, and revesal contact and the PLC of solenoid directional control valve are controlled
Device electrically connects, and the closing time of the time relay is identical with turn-off time.
After the present invention sets control module of buying securities with all one's capital, the control module of buying securities with all one's capital in first switch or second switch is not detected by this
When position is bought securities with all one's capital, the solenoid directional control valve on the circuit is connected, and the positive action of hydraulic cylinder 3, the open-and-close mechanism 2 of the position is opened.When
When position where control module of buying securities with all one's capital detects is bought securities with all one's capital, circuit disconnects where control module of buying securities with all one's capital, and control module of buying securities with all one's capital will
Signal of buying securities with all one's capital feeds back to PLC, and PLC directly controls solenoid directional control valve counteragent, and the piston rod of hydraulic cylinder 3 is stretched
Go out, the open-and-close mechanism 2 at the position is closed.Therefore, two groups of discharge ports 11 can be opened alternately, each discharge port 11 in single group discharge port 11
Charging is evenly distributed, then mineral can be evenly distributed in railway carriage, avoids vehicle from producing inclination or the situation by large impact.
Example IV
On the basis of above-mentioned any one embodiment, it is electrically connected with the PLC for whether detecting vehicle
Infrared ray sensor in place, be electrically connected with PLC for prompt vehicle whether voice signal device and light letter in place
Number device.
After infrared ray sensor detects vehicle in place, PLC is to control voice signal device and optical signal exchanger
Signal condition changes, and reminds driver vehicle in place with this, also reminds other vehicles can not to enter the parking stall.
Embodiment five
On the basis of above-mentioned any one embodiment, the control module of buying securities with all one's capital includes some radar range finding sensors,
Radar range finding sensor is electrically connected to form feedback circuit with PLC, and a radar range finding is mounted on each discharge port
Sensor, radar range finding sensor are electrically connected with electromagnetic relay, and electromagnetic relay is electrically connected with switch of buying securities with all one's capital, with first switch
One end of the switch of buying securities with all one's capital of the control module of buying securities with all one's capital of electrical connection electrically connects with first switch, the control of buying securities with all one's capital electrically connected with second switch
One end of the switch of buying securities with all one's capital of molding block electrically connects with second switch, and the other end for switch of buying securities with all one's capital and the positive stroke of solenoid directional control valve touch
Head electrical connection.
When radar range finding sensor, which detects, buys securities with all one's capital, electromagnetic relay action, buy securities with all one's capital and switch off, then solenoid directional control valve
Stop positive action.The radar range finding sensor signal that will buy securities with all one's capital feeds back to PLC, PLC control solenoid directional control valve
Counteragent, then open-and-close mechanism 2 discharge port is closed.The present invention can close discharge port automatically when buying securities with all one's capital, and reduce artificial behaviour
Make, avoid the overladen situation of mineral.
Claims (5)
1. ore storage bin automatic control system, it is characterised in that including industrial computer, industrial computer is electrically connected with PLC, PLC controls
Device is electrically connected with Interleaved control module, and Interleaved control module is electrically connected with some solenoid directional control valves, and solenoid directional control valve is connected with use
In the hydraulic cylinder (3) that the open-and-close mechanism (2) on the discharge port (11) of control ore storage bin (1) opens and closes.
2. ore storage bin automatic control system according to claim 1, it is characterised in that the Interleaved control module includes the time
Relay, the time relay are electrically connected with PLC, and first switch is electrically connected with the normally opened contact of the time relay, the
One switch electrically connects with the positive stroke contact of a portion solenoid directional control valve；It is electrically connected with the normally-closed contact of the time relay
Second switch, second switch electrically connect with the positive stroke contact of another part solenoid directional control valve, the closing time of the time relay
It is identical with turn-off time；The revesal contact of solenoid directional control valve electrically connects with PLC.
3. ore storage bin automatic control system according to claim 1, it is characterised in that the Interleaved control module includes the time
Relay, the time relay are electrically connected with PLC, and first switch is electrically connected with the normally opened contact of the time relay, when
Between relay normally-closed contact on be electrically connected with second switch；It is respectively connected with and buys securities with all one's capital on the positive stroke contact of some solenoid directional control valves
Control module, output end and a portion of first switch control module of buying securities with all one's capital are electrically connected, and second switch is expired with another part
Storehouse control module electrical connection；Control module of buying securities with all one's capital is electrically connected to form feedback circuit, the revesal of solenoid directional control valve with PLC
Contact electrically connects with PLC, and the closing time of the time relay is identical with turn-off time.
4. the ore storage bin automatic control system according to Claims 2 or 3, it is characterised in that electrically connected in the PLC
Have for detect vehicle whether infrared ray sensor in place, be electrically connected with PLC for whether in place prompting vehicle
Voice signal device and optical signal exchanger.
5. ore storage bin automatic control system according to claim 3, it is characterised in that the control module of buying securities with all one's capital includes some
Radar range finding sensor, radar range finding sensor are electrically connected to form feedback circuit with PLC, are respectively mounted on each discharge port
There is a radar range finding sensor, radar range finding sensor is electrically connected with electromagnetic relay, and electromagnetic relay, which is electrically connected with, buys securities with all one's capital
Switch, one end of the switch of buying securities with all one's capital of the control module of buying securities with all one's capital electrically connected with first switch electrically connects with first switch, opened with second
One end of the switch of buying securities with all one's capital of the control module of buying securities with all one's capital of powered-down connection electrically connects with second switch, the other end and electromagnetism of switch of buying securities with all one's capital
The positive stroke contact electrical connection of reversal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710866834.4A CN107479488B (en) | 2017-09-22 | 2017-09-22 | Automatic control system for ore bin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710866834.4A CN107479488B (en) | 2017-09-22 | 2017-09-22 | Automatic control system for ore bin |
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| CN107479488A true CN107479488A (en) | 2017-12-15 |
| CN107479488B CN107479488B (en) | 2023-09-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020030439A1 (en) * | 2018-08-06 | 2020-02-13 | Thyssenkrupp Industrial Solutions Ag | System for continuously loading utility vehicles |
| CN115057257A (en) * | 2022-07-01 | 2022-09-16 | 上海宝田新型建材有限公司 | Detection and control system for preventing expansion damage of ore powder bulk head chute barrel |
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