CN116730037B - Feeding system and control method thereof - Google Patents
Feeding system and control method thereof Download PDFInfo
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- CN116730037B CN116730037B CN202310996199.7A CN202310996199A CN116730037B CN 116730037 B CN116730037 B CN 116730037B CN 202310996199 A CN202310996199 A CN 202310996199A CN 116730037 B CN116730037 B CN 116730037B
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- ventilation
- unit
- blowing
- storage bin
- control device
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009423 ventilation Methods 0.000 claims abstract description 110
- 238000007664 blowing Methods 0.000 claims abstract description 86
- 238000001914 filtration Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000010926 purge Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000011010 flushing procedure Methods 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 abstract description 12
- 239000000428 dust Substances 0.000 description 9
- 238000003912 environmental pollution Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
-
- 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
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
-
- 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
-
- 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
- B65G69/18—Preventing escape of dust
Abstract
The application provides a feeding system and a control method thereof, relates to the technical field of feeding equipment, and is used for solving the problem that a screw conveyor emits powder outwards; the screw conveyor is communicated with the storage bin, and the two ventilation devices are arranged on the storage bin and are electrically connected with the control device; the ventilation device comprises a ventilation cylinder, a filtering unit and a pulse back-blowing unit, wherein the ventilation cylinder is provided with an air outlet communicated with a storage bin, the filtering unit is arranged in the ventilation cylinder, the pulse back-blowing unit is provided with a back-blowing port in the ventilation cylinder, and the back-blowing port is configured to spray compressed gas to the filtering unit so as to purge materials on the filtering unit; the control device is configured to control the opening and closing of each air outlet and the starting and stopping of the pulse back-blowing units, and when the pulse back-blowing units in one ventilation device are started, the air outlets in other at least part of ventilation devices are simultaneously opened. The application can prevent the spiral conveyor from powder discharge.
Description
Technical Field
The application relates to the technical field of feeding equipment, in particular to a feeding system and a control method thereof.
Background
A material feeding system for industries such as chemical industry, granary include screw conveyer and with screw conveyer intercommunication's feed bin, screw conveyer carries powder class material to the feed bin, and the material falls into in the feed bin through self gravity, and the powder material is in the in-process that falls into the feed bin, and the dust particle of dissipation in the air generally can be collected through filtering for example the filter core, need carry out the blowback operation to the filter core after a period to avoid adhering too much material on the filter core. However, during blowback operation, screw conveyors have problems with the outward emission of powder material.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a feeding system and a control method thereof, which can make air pressure in a bin and an auger reach a balanced state, so as to avoid the problem that the auger emits powder materials outwards during back blowing operation, thereby avoiding environmental pollution and improving user experience.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
a first aspect of an embodiment of the present application provides a feeding system, including: the device comprises a screw conveyor, a storage bin, two ventilation devices and a control device; the screw conveyor is communicated with the storage bin, and the two ventilation devices are arranged on the storage bin and are electrically connected with the control device; each ventilation device comprises a ventilation cylinder, a filtering unit and a pulse back-blowing unit, wherein the ventilation cylinder is provided with an air outlet communicated with the storage bin and the outside air, the filtering unit is arranged in the ventilation cylinder, the pulse back-blowing unit is provided with a back-blowing port arranged in the ventilation cylinder, and the back-blowing port is configured to spray compressed gas to the filtering unit so as to purge materials on the filtering unit; the control device is configured to control the opening and closing of each air outlet and the starting and stopping of the pulse back-blowing units, and when the pulse back-blowing units in one ventilation device are started, at least part of the air outlets in other ventilation devices are simultaneously opened.
In some optional embodiments, a valve is disposed at each air outlet, the control device is electrically connected with the valve, and the control device controls the valve to open or close the air outlet.
In some alternative embodiments, a solenoid valve is disposed in the gas permeable cylinder at a position near the filtering unit, the solenoid valve is in signal connection with the control device, and the solenoid valve is configured to detect material deposited on the filtering unit.
In some alternative embodiments, the two ventilation devices comprise two ventilation devices, and the two ventilation devices are arranged at the top of the bin at intervals.
In some optional embodiments, the filtering unit includes a filter element, the pulse back-flushing unit includes a gas jet pipe, a pulse valve, a compression pump and a gas tank that are sequentially connected, the compression pump is configured to transmit gas in the gas tank to the gas of the gas jet pipe for compression, a back-flushing port is arranged at an end of the gas jet pipe, the pulse valve is in signal connection with the control device, and the control device controls opening of the pulse valve, so that the compressed gas of the compression pump sweeps the filter element through the back-flushing port.
In some alternative embodiments, the screw conveyor further comprises a connecting pipe, one end of the connecting pipe is communicated with the screw conveyor, and the other end of the connecting pipe is communicated with the storage bin.
A second aspect of the embodiment of the present application provides a control method of a feeding system, which is applied to the feeding system described in the foregoing embodiment, where the control method includes:
acquiring at least one of a density and a thickness of a material deposited on the filter unit;
and determining to start a pulse back-blowing unit in one of the ventilation devices on the storage bin according to at least one of the density and the thickness of the material deposited on the filtering unit, and simultaneously opening at least part of air outlets in other ventilation devices on the storage bin.
In some alternative embodiments, the pulse back-blowing unit in one of the ventilation devices on the bin is started and the air outlets in the other ventilation devices on the bin are simultaneously opened during the process of conveying materials into the bin by the screw conveyor.
In some alternative embodiments, the purge of the pulse back-flushing unit is periodic after the pulse back-flushing unit is activated.
In some optional embodiments, after the pulse back-flushing unit is started, the purging of the pulse back-flushing unit is periodically circulated with a purging duration of 2 s-5 s; and the time length of the stop between the adjacent purging time lengths is 30 s-35 s.
The feeding system provided by the embodiment of the application comprises a screw conveyor, a storage bin, two ventilation devices and a control device, wherein the screw conveyor is communicated with the storage bin, the two ventilation devices are arranged on the storage bin and are electrically connected with the control device, each ventilation device comprises a ventilation cylinder, a filtering unit and a pulse back-blowing unit, the ventilation cylinder is provided with an air outlet communicated with the storage bin and external air, the filtering unit is arranged in the ventilation cylinder, the pulse back-blowing unit is provided with a back-blowing port arranged in the ventilation cylinder, and the back-blowing port is configured to spray compressed gas to the filtering unit so as to purge materials on the filtering unit; the control device is configured to control the opening and closing of each air outlet and the starting and stopping of the pulse back-blowing units, and when the pulse back-blowing unit in one ventilation device is started, at least part of air outlets in other ventilation devices are simultaneously opened. Therefore, in the scheme, the control device controls the pulse back-blowing unit to start back-blowing operation, and simultaneously controls the air outlets in other at least partial ventilation devices to be opened, so that air flows in the storage bin and the screw conveyor flow towards the air outlet with smaller air pressure, the air pressure values in the storage bin and the screw conveyor are reduced, the air pressure values in the storage bin and the screw conveyor reach an equilibrium state, the problem that the screw conveyor outwards emits powder materials due to overlarge air pressure is prevented, environmental pollution is avoided, and user experience is improved.
In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, other technical problems that can be solved by the feeding system and the control method thereof, other technical features included in the technical solutions, and beneficial effects caused by the technical features provided by the embodiments of the present application will be described in further detail in the detailed description of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a feeding system according to an embodiment of the present application;
fig. 2 is a flow chart of a control method of a feeding system according to an embodiment of the present application.
Reference numerals:
100-feeding system;
110-screw conveyor;
120-bin;
130-connecting pipes;
140-ventilation means;
141-a gas permeable cylinder;
142-a filtration unit;
143-pulse valve;
144-a compression pump;
145-gas tank;
146-gas lance.
Detailed Description
In the related art, a material feeding system for industries such as chemical industry, grain and grass includes screw conveyer and the feed bin that communicates with screw conveyer, and screw conveyer carries powder class material to the feed bin, and the material falls into in the feed bin through self gravity, and the powder material generally filters through the filter core through the dust granule of filter core in the in-process of falling into the feed bin, and after a period of time, need carry out the blowback operation to the filter core to avoid adhering too much material on the filter core. However, in the back blowing operation process, the back blowing gas can make the internal atmospheric pressure of feed bin and screw conveyer great, and when gas can't in time discharge, because screw conveyer's seal is not tight, under the great operating mode of atmospheric pressure, can exist the screw conveyer outwards to emit the problem of powder material to cause environmental pollution.
In order to solve the problems, the application provides a feeding system and a control method thereof, wherein the control device controls the pulse back-blowing unit to start back-blowing operation, and simultaneously controls the air outlets in other at least partial ventilation devices to be opened, so that air flows in the storage bin and the screw conveyor flow towards the air outlet with smaller air pressure, and the air pressure values in the storage bin and the screw conveyor are reduced, so that the air pressure values in the storage bin and the screw conveyor reach an equilibrium state, the problem that the screw conveyor outwards emits powder materials due to overlarge air pressure is avoided, the environmental pollution is avoided, and the user experience is improved.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is a schematic structural diagram of a feeding system according to an embodiment of the present application. Referring to fig. 1, an embodiment of the present application provides a feeding system 100, which includes a screw conveyor 110, a bin 120, two ventilation devices 140 and a control device; wherein, the screw conveyor 110 is communicated with the bin 120, and two ventilation devices 140 are arranged on the bin 120 and are electrically connected with the control device; each ventilation device 140 comprises a ventilation cylinder 141, a filtering unit 142 and a pulse back-blowing unit, wherein the ventilation cylinder 141 is provided with an air outlet communicated with the storage bin 120 and the outside air, the filtering unit 142 is arranged in the ventilation cylinder 141, the pulse back-blowing unit is provided with a back-blowing port arranged in the ventilation cylinder 141, and the back-blowing port is configured to spray compressed gas to the filtering unit 142 so as to purge materials on the filtering unit 142; the control device is configured to control the opening and closing of each air outlet and the start and stop of the pulse back-blowing units, and when the pulse back-blowing unit in one ventilation device 140 is started, the air outlets in other at least part of ventilation devices 140 are simultaneously opened.
Wherein the bin 120 may have a metering function, e.g., a scale is provided on the bin 120, different scales having different capacities.
In the embodiment of the application, when materials enter the bin 120 through the screw conveyor 110, as part of dust particles scattered in the air can be adsorbed on the filtering unit 142, when the materials enter the bin 120, the pulse back blowing unit is started by the control device so as to blow compressed gas to the filtering unit 142 through the pulse back blowing unit, and the dust particles adsorbed on the filtering unit 142 are blown.
It is understood that two venting devices 140 may include two venting devices 140 or more than two venting devices 140.
In some embodiments, when the ventilation devices 140 are more than two, for example, three ventilation devices 140, the control device starts the pulse back-blowing unit in one ventilation device 140, and simultaneously starts at least one air outlet in the other two ventilation devices 140 to be opened, so that when the pulse back-blowing unit is in back-blowing operation, high-pressure air flow in the storage bin 120 can flow out through the opened air outlet, so that the air pressure value in the storage bin 120 is reduced, and the air pressure in the storage bin 120 reaches a state of tending to balance.
In other embodiments, the control device controls the pulse back-blowing unit in one ventilation device 140 to be started, and at the same time, the control device starts the air outlets in other ventilation devices 140 to be fully opened, for example, when the ventilation devices 140 are more than two, the air flow with larger air pressure in the storage bin 120 can flow out through the air outlets respectively, so that the efficiency of reducing the air pressure in the storage bin 120 can be improved, and the air pressure in the storage bin 120 can quickly reach the device tending to balance.
Therefore, in the embodiment of the application, the control device controls the pulse back-blowing units in the plurality of ventilation devices 140 to be linked with the air outlets, so that the air pressure balance in the storage bin 120 can be automatically realized, the manual independent starting or closing is not needed, the operation is convenient and quick, and the user experience can be improved.
In some embodiments, when the screw conveyor 110 conveys materials to the bin 120, the control device may control the pulse back-blowing units in each air-permeable device 140 to sequentially start, for example, the control device controls the pulse back-blowing units in the different air-permeable devices 140 to sequentially and periodically open, that is, the pulse back-blowing units in the different air-permeable devices 140 are started in different time periods, and simultaneously the air outlets in the other air-permeable devices 140 are opened, that is, each pulse back-blowing unit in the two air-permeable devices 140 may be alternately opened in turn, so that each air-permeable device 140 sequentially and alternately uses, and the pulse back-blowing unit in each air-permeable device 140 sweeps its corresponding filter unit 142 to avoid depositing more materials on the filter unit 142, and simultaneously, the back-blowing air flows out through the other opened air outlets, so that the problem of local air pressure value in the bin 120 is excessive can be avoided, and the air pressure value in the bin 120 tends to be balanced rapidly, so that the screw conveyor 110 does not emit dust outwards.
In some embodiments, the two ventilation devices 140 include two ventilation devices 140, the two ventilation devices 140 are arranged at the top of the bin 120 at intervals, and the ventilation cylinder 141 is illustratively arranged at the top of the bin 120, and the ventilation cylinder 141 is communicated with the bin 120, and the ventilation cylinder 141 further has an air outlet that can be communicated with external air, and a valve is arranged at the air outlet, and the control device can control the valve to realize opening or closing of the air outlet, so that the efficiency of air outflow can be accelerated by arranging the ventilation cylinder 141 at the top of the bin 120 because the air generally flows from bottom to top.
As shown in fig. 1, when two ventilation devices 140 are needed, the control device controls the pulse back-blowing unit corresponding to one of the two ventilation devices 140 to start and simultaneously opens the air outlet of the other ventilation device 140, so that the two ventilation devices 140 are used alternately, back-blowing air can be discharged from the air outlet of one ventilation device 140, and the problem of overhigh local pressure is not caused, thereby effectively solving the problem of dust emission of the screw conveyor 110.
In some embodiments, a valve is disposed at each air outlet, and the control device is electrically connected to the valve and controls the valve to open or close the air outlet.
In some embodiments, a solenoid valve is disposed in the ventilation cylinder 141 near the filtering unit 142, the solenoid valve is in signal connection with the control device, the infrared is configured to detect the material deposited on the filtering unit 142, when the solenoid valve detects that the material deposited on the filtering unit 142 reaches a preset density or thickness (for example, reaches a density or thickness for starting the pulse back-blowing unit), the control device starts the corresponding pulse back-blowing unit in the ventilation device 140, so as to purge the filtering unit 142 through the pulse back-blowing unit, and remove the material deposited on the filtering unit 142; wherein the pulse back-flushing unit may purge the filter unit 142 periodically, for example, every 30s for 3s; in addition, the control device also simultaneously activates the air outlets in the other ventilation devices 140, so that the air flow with a larger air pressure value in the storage bin 120 flows towards the opened air outlet and flows out through the air outlet.
In other embodiments, a pressure detecting sensor is disposed at an end of each air permeable cylinder 141 near the storage bin 120, the pressure detecting sensor is in signal connection with the control device, the pressure detecting sensor is used for detecting the pressure of the air permeable cylinder 141 near the storage bin 120, when the pressure of the pressure detecting sensor is greater than or equal to the pressure of the dust emitted by the screw conveyor 110, the control device controls the air outlet in each air permeable device 140 to be opened, so that the air with larger air pressure in the storage bin 120 flows out through each air outlet, and the pressure in the storage bin 120 is reduced.
In some embodiments, the filtering unit 142 includes a filter element, the pulse back flushing unit includes a gas jet 146, a pulse valve 143, a compression pump 144 and a gas tank 145 connected in sequence, the compression pump 144 is configured to transmit gas in the gas tank 145 to the gas of the gas jet 146 for compression, a back flushing port is disposed at an end of the gas jet 146, the pulse valve 143 is in signal connection with a control device, and the control device controls opening of the pulse valve 143 so that the gas compressed by the compression pump 144 sweeps the filter element through the back flushing port.
Illustratively, the air lance 146 includes a main pipe and a plurality of branch pipes disposed on the main pipe, each branch pipe is disposed on the main pipe at uniform intervals and is communicated with the main pipe, each blowback port is disposed at an end of each branch pipe, and the air lance 146 is disposed in the filter element, and the blowback ports on each branch pipe respectively correspond to different positions of the circumferential direction of the filter element, so, when the control device controls the pulse valve 143 to start, each blowback port ejects compressed gas to different positions of the filter element, so that materials on the filter element are purged outwards from the center of the filter element, thereby achieving rapid removal of materials deposited on the filter element.
Alternatively, the pulse back-blowing unit may have other structures, as long as the pulse back-blowing unit can purge the material deposited on the filter element, and specifically, the pulse back-blowing unit may refer to the scheme in the related art, and no limitation is made herein.
In some embodiments, the feeding system 100 further includes a connection pipe 130, one end of the connection pipe 130 is in communication with the screw conveyor 110, and the other end of the connection pipe 130 is in communication with the bin 120, such that the screw conveyor 110 conveys the material to the bin 120 through the connection pipe 130.
Fig. 2 is a flow chart of a control method of a feeding system according to an embodiment of the present application. Referring to fig. 1 and fig. 2, an embodiment of the present application further provides a control method of a feeding system, which is applied to the feeding system provided in the foregoing embodiment, where the control method specifically includes:
step S101: at least one of a density and a thickness of material deposited on the filter unit is obtained.
As shown in fig. 1, two ventilation devices 140 are disposed on the bin 120, each ventilation device 140 includes a ventilation cylinder 141, a filtering unit 142 and a pulse back-blowing unit, the ventilation cylinder 141 has an air outlet communicating the bin 120 with the outside air, the filtering unit 142 is disposed in the ventilation cylinder 141, the pulse back-blowing unit has a back-blowing port disposed in the ventilation cylinder 141, and the back-blowing port is configured to spray compressed gas to the filtering unit 142 to purge the material on the filtering unit 142; the control device is configured to control the opening and closing of each air outlet and the start and stop of the pulse back blowing unit, wherein an electromagnetic valve is arranged in the air permeable cylinder 141 at a position close to the filtering unit 142, and when the screw conveyor 110 conveys materials to the storage bin 120, the electromagnetic valve arranged close to the filtering unit 142 detects one of the density and the thickness on the filtering unit 142 or detects the density and the thickness on the filtering unit 142 at the same time, and the detected parameters are fed back to the control device.
Step S102: and determining to start the pulse back-blowing unit in one of the ventilation devices on the storage bin and simultaneously opening the air outlets in at least part of the other ventilation devices on the storage bin according to at least one of the density and the thickness of the material deposited on the filtering unit.
In particular, when at least one of the density and the thickness of the filter unit 142 reaches the parameter of starting the pulse back-blowing unit, the control device controls the pulse back-blowing unit to start, and simultaneously controls the air outlets of at least part of other ventilation devices 140 to be opened, so that when the back-blowing operation is performed on the filter unit 142, the back-blowing air of the pulse back-blowing unit causes the air pressure value in the storage bin 120 to be increased, and the air flow with larger air pressure value flows through each opened air outlet, so that the air outlet achieves the ventilation purpose, the problem that the air pressure values in the storage bin 120 and the screw conveyor 110 are larger to cause the screw conveyor 110 to emit dust outwards is avoided, the environment pollution can be avoided, and the user experience is improved.
It should be noted that, in each ventilation device 140, the control device first starts the pulse back-blowing unit corresponding to the filter unit 142 with the largest density or thickness, and simultaneously opens the air outlet of at least some other ventilation devices 140; when the density or thickness of the filter unit 142 in each ventilation device 140 reaches the value of the corresponding pulse back-blowing unit, the control device may sequentially and sequentially activate the pulse back-blowing units in each ventilation device 140 and simultaneously open at least part of the air outlets in other ventilation devices 140.
In some embodiments, when at least one of the density and thickness of the filter unit 142 reaches the parameters for activating the pulse back-blowing unit, the control device controls the pulse back-blowing unit to be activated, and simultaneously controls the air outlets in the other ventilation devices 140 to be fully opened, so that the efficiency of balancing the air pressure value in the storage bin 120 can be improved, and the pressure in the storage bin 120 and the screw conveyor 110 can be quickly reduced, so that the problem of dust emission of the screw conveyor 110 can be prevented, and environmental pollution can be avoided.
In some embodiments, after each pulse back-flushing unit is started, the control device may control the purging of the pulse back-flushing unit to be periodic, for example, the pulse back-flushing unit is stopped for a fixed period after being purged for a period of time, and then purging is continued until the solenoid valve detects that the material deposited on the filter unit 142 corresponding to the pulse back-flushing unit is less than the density or thickness of the pulse back-flushing unit, and the pulse back-flushing unit is operated in a periodic intermittent manner, so as to avoid the problem that the air pressure in the bin 120 is too great instantaneously.
The method comprises the steps that after the pulse back-flushing unit is started, the purging of the pulse back-flushing unit is periodically circulated with a purging time length of 2 s-5 s, wherein an interval time length between adjacent purging is 30 s-35 s, for example; illustratively, the pulse back-flushing unit sweeps for 3s every 30s interval.
The material feeding system and the control method thereof provided by the embodiment of the application comprise a screw conveyor, a storage bin, two ventilation devices and a control device, wherein the screw conveyor is communicated with the storage bin, the two ventilation devices are arranged on the storage bin and are electrically connected with the control device, each ventilation device comprises a ventilation cylinder, a filtering unit and a pulse back-blowing unit, the ventilation cylinder is provided with an air outlet communicated with the storage bin and external air, the filtering unit is arranged in the ventilation cylinder, the pulse back-blowing unit is provided with a back-blowing port arranged in the ventilation cylinder, and the back-blowing port is configured to jet compressed gas to the filtering unit so as to purge materials on the filtering unit; the control device is configured to control the opening and closing of each air outlet and the starting and stopping of the pulse back-blowing units, and when the pulse back-blowing unit in one ventilation device is started, at least part of air outlets in other ventilation devices are simultaneously opened. Therefore, in the scheme, the control device controls the pulse back-blowing unit to start back-blowing operation, and simultaneously controls the air outlets in other at least partial ventilation devices to be opened, so that air flows in the storage bin and the screw conveyor flow towards the air outlet with smaller air pressure, the air pressure values in the storage bin and the screw conveyor are reduced, the air pressure values in the storage bin and the screw conveyor reach an equilibrium state, the problem that the screw conveyor outwards emits powder materials due to overlarge air pressure is prevented, environmental pollution is avoided, and user experience is improved.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A feeding system, comprising: the device comprises a screw conveyor, a storage bin, two ventilation devices and a control device;
the screw conveyor is communicated with the storage bin, and the two ventilation devices are arranged on the storage bin and are electrically connected with the control device;
each ventilation device comprises a ventilation cylinder, a filtering unit and a pulse back-blowing unit, wherein the ventilation cylinder is provided with an air outlet communicated with the storage bin and the outside air, the filtering unit is arranged in the ventilation cylinder, the pulse back-blowing unit is provided with a back-blowing port arranged in the ventilation cylinder, and the back-blowing port is configured to spray compressed gas to the filtering unit so as to purge materials on the filtering unit;
the control device is configured to control the opening and closing of each air outlet and the starting and stopping of the pulse back-blowing units, and when the pulse back-blowing units in one ventilation device are started, other air outlets in at least part of the ventilation devices are simultaneously opened.
2. The feeding system of claim 1, wherein a valve is provided at each air outlet, the control device is electrically connected to the valve, and the control device controls the valve to open or close the air outlet.
3. The feeding system according to claim 2, wherein a solenoid valve is provided in the gas permeable cylinder at a position close to the filter unit, said solenoid valve being in signal connection with the control device, said solenoid valve being configured to detect material deposited on the filter unit.
4. A feeding system according to any one of claims 1-3, wherein two of said ventilation means comprise two of said ventilation means, two of said ventilation means being arranged at a distance from the top of said silo.
5. A feeding system according to any one of claims 1-3, wherein the filtering unit comprises a filter element, the pulse back flushing unit comprises a gas jet pipe, a pulse valve, a compression pump and a gas tank which are connected in sequence, the compression pump is configured to compress gas in the gas tank and transmit the gas to the gas jet pipe, the back flushing port is arranged at the end part of the gas jet pipe, the pulse valve is in signal connection with the control device, and the control device controls the opening of the pulse valve so that the compressed gas of the compression pump sweeps the filter element through the back flushing port.
6. A feeding system according to any one of claims 1-3, further comprising a connecting tube, one end of which is in communication with the screw conveyor, the other end of which is in communication with the silo.
7. A control method of a feeding system, applied to the feeding system according to any one of claims 1 to 6, characterized in that the control method comprises:
acquiring at least one of a density and a thickness of a material deposited on the filter unit;
and determining to start a pulse back-blowing unit in one ventilation device on the storage bin according to at least one of the density and the thickness of the material deposited on the filtering unit, and simultaneously opening at least part of air outlets in other ventilation devices on the storage bin.
8. The method of controlling a dosing system according to claim 7, wherein,
in the process of conveying materials into the storage bin by the screw conveyor, starting a pulse back blowing unit in one ventilation device on the storage bin, and simultaneously opening air outlets in other ventilation devices on the storage bin.
9. The method of claim 7, wherein the purge of the pulse back-flushing unit is periodic after the pulse back-flushing unit is activated.
10. The method for controlling a feeding system according to claim 9, wherein after the pulse back-flushing unit is started, the purging of the pulse back-flushing unit is periodically circulated with a purging duration of 2 s-5 s, and a dead duration between adjacent purging durations is 30 s-35 s.
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| JP2002276437A (en) * | 2001-03-14 | 2002-09-25 | Nissan Motor Co Ltd | Evaporating fuel treatment device for engine |
| CN204777661U (en) * | 2015-07-08 | 2015-11-18 | 浙江金汇华特种耐火材料有限公司 | Compounding pneumatic transmission device with structure is retrieved to powder |
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