CN108622675B - Air-assisted vector weighing and feeding system and control method - Google Patents
Air-assisted vector weighing and feeding system and control method Download PDFInfo
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- CN108622675B CN108622675B CN201710152238.XA CN201710152238A CN108622675B CN 108622675 B CN108622675 B CN 108622675B CN 201710152238 A CN201710152238 A CN 201710152238A CN 108622675 B CN108622675 B CN 108622675B
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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
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
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- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/24—Gas suction systems
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
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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
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
A wind-conveying type vector weighing and feeding system relates to the technical field of batching equipment of powder materials and comprises a rack, a feeding bin, a feeding system, a weighing system and a wind-conveying system; the feeding system comprises an anti-bridging device, a bin blanking device and a blanking motor, wherein the anti-bridging device is arranged in an inlet of the bin blanking device, and the blanking motor is connected with a blanking mechanism in the bin blanking device; the weighing system comprises a weighing hopper, a metering spiral scale, a powder stirring wall scraping device, a filter cylinder and a weighing sensor; the air supply system comprises an acceleration chamber, an air inlet, a speed reduction motor, a reamer and a ventilation pipe, wherein the reamer and the ventilation pipe are installed in the acceleration chamber, the air inlet is communicated with the ventilation pipe, one section of rubber hose is connected with an outlet of the acceleration chamber, a hose is connected with a conveying pipeline, the hose is sleeved with a hard pipe, the hard pipe is connected with a vibrating machine, the air supply system has the advantages that the segmented PID control feeding is realized, the feeding is guaranteed to have higher precision and stability, and the situation of material blockage cannot easily occur.
Description
Technical Field
The invention relates to the technical field of powder material batching equipment, in particular to an air-assisted vector weighing and feeding system and a control method.
Background
At present in fields such as building materials, metallurgy, electric power, chemical industry, the dosing process of powder material is often related to, show as fig. 1 for the dosing equipment of a common adoption volumetric metering mode in the trade, wherein 1 'is measurement conveying system, 11' is screw conveyer, 12 'is the feed inlet, 13' is the feed opening, 2 'is the wind system of sending, 21' is the accelerator, 22 'is the material export, 3' is the material storehouse, measurement conveying system and wind system of sending are two independent detached devices and assemble the use after the flexible coupling, the theory of operation of this kind of assembly device: the method comprises the following steps that materials enter a material bin and then are fed into a screw conveyor through a feeding hole, the screw conveyor conveys the quantified materials to a discharging hole, the materials enter an accelerator through the discharging hole, the accelerator accelerates the materials in an air conveying mode to be sprayed to a material outlet, and the materials are conveyed to the next procedure through a conveying pipeline; in addition, when the raw material just enters the conveying pipeline through the material outlet of the accelerator, the air blowing sent by the air blowing system is subjected to the action of air pressure, the temperature is increased, the compressed air blowing is suddenly released under the resistance of the material outlet, and the raw material, carbon dioxide and water are most easily gathered and adhered to the wall to react, so that the conveying pipeline which is connected with the accelerator and is positioned at the forefront is most easily subjected to material blockage and is often the most serious area of the material blockage.
Disclosure of Invention
To above problem, this application provides a material is thrown in segmentation closed-loop control, guarantees to throw the material and has higher precision, stability, and the difficult air-assisted vector that takes place the material jam condition feeds the system of weighing, also provides a feed control method based on above-mentioned air-assisted vector feeds the system of weighing simultaneously, and its technical scheme is as follows:
an air-assisted vector weighing and feeding system comprises a rack, a feeding bin, a feeding system, a weighing system and an air-assisted system;
the feeding system comprises an anti-bridging device, a bin blanking device and a blanking motor, wherein the anti-bridging device is arranged in an inlet of the bin blanking device, and the blanking motor is connected with a blanking mechanism in the bin blanking device;
the weighing system comprises a weighing hopper, a metering spiral scale, a powder stirring and wall scraping device and a weighing sensor, wherein the weighing hopper is a spherical shell with a containing cavity inside, a feeding hole and a discharging hole are respectively arranged at the upper part and the lower part of the weighing hopper, a filter cylinder communicated with the outside is also arranged on the weighing hopper, the metering spiral scale comprises a conveying chamber and a spiral machine arranged in the conveying chamber, one end of a rotating shaft of the spiral machine is connected with a transmission case, the other end of the rotating shaft of the spiral machine is connected with a speed reducer, the speed reducer is connected with a variable frequency motor, the powder stirring and wall scraping device comprises a rotating shaft and a fixing frame crossed and connected with the rotating shaft, an arc-shaped scraping blade is connected between the rotating shaft and the two ends of the fixing frame and clings to the inner wall of the weighing hopper, the transmission case is respectively rotationally connected with the rotating shaft and the rotating shaft through an internal chain mechanism, and the feeding hole is flexibly connected with a feeder outlet of the storage bin, the discharge port is communicated with the material conveying chamber, the material conveying chamber is communicated with a material conveying pipeline at an outlet, the weighing sensor is positioned below the screw conveyor and is electrically connected with the weighing hopper, the discharging motor and an external PAC controller, and the PAC controller is electrically connected with the variable frequency motor and the discharging motor;
the air supply system comprises an acceleration chamber, an air inlet, a speed reduction motor, a reamer and a ventilation pipe, wherein the reamer and the ventilation pipe are installed in the acceleration chamber;
the weighing system is fixed on the frame, the pneumatic conveying system is arranged on the frame below the weighing system, the feeding system is arranged above the frame, and the feeding bin is arranged above the feeding system.
Furthermore, an alarm device for detecting pipeline blockage is arranged in the material conveying pipeline.
A control method of an air-assisted vector weighing and feeding system comprises the following steps:
(a) setting an upper threshold value W1 and a lower threshold value W2 of the weighing sensor, inputting set values W1 and W2 into a PAC controller, and pre-inputting the rotating speed of the variable frequency motor on the PAC controller;
(b) starting the variable frequency motor to start material conveying, detecting the material reduction amount of a weighing hopper in unit time by a weighing sensor, namely the actual feeding amount in unit time, feeding the actual feeding amount back to a PAC controller, and calculating the average rotating speed of the variable frequency motor in unit time through an internal program;
(c) the PAC controller compares the rotating speed of the pre-input variable frequency motor with the average rotating speed of the variable frequency motor in the unit time, and then adjusts the rotating speed of the variable frequency motor in the next unit time of the metering screw scale;
(d) circulating the steps (b) and (c), in the process, when the value of the weighing sensor is lower than W2, the feeding system starts feeding materials to the weighing hopper, and when the value of the weighing sensor reaches W1, the feeding system stops feeding materials to the weighing hopper;
(e) and (c) circulating the steps (b), (c) and (d) until the material feeding in one feeding period is completed.
According to the technical scheme, the invention solves the problem of a control mode without feedback information, the actual feeding amount in unit time of the weighing hopper is detected by the weighing sensor, the actual feeding amount is fed back to the PAC controller, the average rotating speed of the variable frequency motor of the screw machine is calculated by an internal program so as to adjust the actual feeding amount in the next unit time, the invention can detect the instantaneous actual feeding quantity and control the change of the feeding quantity, finally realize that the accumulated actual feeding quantity is the same as the accumulated set feeding quantity of the system, increase the metering precision and ensure that the whole system runs more safely and reliably; in addition, the weighing hopper is connected with a filter cylinder, air can be filtered out when materials enter the weighing hopper, meanwhile, a reamer is arranged in the acceleration chamber, the outlet of the acceleration chamber is connected with a hose, the hose can vibrate slightly under the action of a vibrator, and the situation that the materials in the acceleration chamber and a pipeline connected with the outlet of the acceleration chamber are not bridged or stuck to the wall to cause blockage is ensured.
Drawings
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
FIG. 1 is a schematic view of a prior art dosing unit;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the weighing system of FIG. 2;
FIG. 4 is a schematic view of the air delivery system of FIG. 2;
FIG. 5 is a flow chart of a control method of the present invention.
Wherein, 1', a metering conveying system; 11', a screw conveyor; 12', a feed inlet; 13' and a feed opening; 2', an air conveying system; 21', an accelerator; 22' and a material outlet; 3', a material bin; 1. a frame; 2. a feeding bin; 3. a feeding system; 31. an anti-bridging device; 32. a stock bin blanking device; 34. a blanking motor; 4. a weighing system; 41. weighing a hopper; 411. a feeding port; 412. a discharge port; 42. a metering screw scale; 421. a material conveying chamber; 422. a screw machine; 4221. a rotating shaft; 43. a powder stirring and wall scraping device; 431. a rotating shaft; 432. a fixed mount; 433. an arc-shaped scraping blade; 44. a weighing sensor; 45. a transmission case; 46. a speed reducer; 47. a variable frequency motor; 48. a material conveying pipeline; 49. an alarm device; 5. an air delivery system; 51. an acceleration chamber; 52. an air inlet; 53. a reduction motor; 54. a reamer; 55. a vent pipe; 56. a connecting port; 57. a hose; 58. a hard tube; 59. a vibrator; 6. a filter cartridge.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
Example (b):
as shown in fig. 2 to 4, the air-assisted vector weighing and feeding system comprises a frame 1, a feeding bin 2, a feeding system 3, a weighing system 4 and an air-assisted feeding system 5;
the feeding system 3 comprises an anti-bridging device 31, a bin blanking device 32 and a blanking motor 34, wherein the anti-bridging device 31 is arranged in an inlet of the bin blanking device 32, and the blanking motor 34 is connected with a blanking mechanism (not shown) in the bin blanking device 32; the material falls into feed bin glassware 32 of below from feed bin 2, unloading motor 34 makes the material slowly get into the weighing hopper 41 of below through the inside unloading mechanism of feed bin glassware 32, the material need pass through at the entrance of feed bin glassware 32 and prevent bridging device 31, the possibility of material in the in-process that gets into feed bin glassware 32 bridging has been reduced, wherein unloading mechanism can adopt the commentaries on classics leaf structure commonly used, it drives the rotation through the unloading motor, prevent bridging device 31 can adopt middle drive mechanism to realize and the linkage of unloading motor 34 pivot, and need not to reconnect other drive arrangement.
As shown in fig. 3, the weighing system 4 includes a weighing hopper 41, a weighing screw scale 42, a powder stirring wall scraping device 43 and a weighing sensor 44, the weighing hopper 41 is a spherical shell with a cavity inside, a material inlet 411 and a material outlet 412 are respectively arranged above and below the weighing hopper 41, a filter cartridge 6 communicated with the outside is further arranged on the weighing hopper 41, the filter cartridge 6 is used for filtering out gas in the weighing hopper 41, the weighing screw scale 42 includes a material conveying chamber 421 and a screw machine 422 installed in the material conveying chamber 421, one end of a rotating shaft 4221 of the screw machine 422 is connected with a transmission box 45, the other end of the rotating shaft 4221 is connected with a speed reducer 46, the speed reducer 46 is connected with a variable frequency motor 47, the powder stirring wall scraping device 43 includes a rotating shaft 431 and a fixing frame 432 crosswise connected with the rotating shaft 431, an arc-shaped scraping blade 433 is connected between the rotating shaft 431 and the two ends of the fixing frame 432, the, the transmission case 45 is respectively rotatably connected with the rotating shaft 4221 and the rotating shaft 431 through an internal chain mechanism, the feeding port 411 is flexibly connected with an outlet of the bin blanking device 32, the discharging port 412 is communicated with the material conveying chamber 421, the material conveying chamber 421 is communicated with a material conveying pipeline 48 at the outlet, a pipeline blockage alarm device 49 is arranged in the material conveying pipeline 48, the weighing sensor 44 is positioned below the screw machine 422 and electrically connected with the weighing hopper 41, the blanking motor 34 and an external PAC controller (not shown), and the PAC controller is electrically connected with the blanking motor 34 and the variable frequency motor 47; the materials are fully stirred in the weighing hopper 41 by the powder stirring wall scraping device 43, so that the density of the materials is kept uniform all the time, meanwhile, the arc-shaped scraping blades 433 in the powder stirring wall scraping device 43 play a wall cleaning role, wherein a rotating shaft 431 of the powder stirring wall scraping device 43 is linked with a rotating shaft 4221 of the screw machine 422 through a transmission box 45, when a variable frequency motor 47 drives the screw machine 422 to rotate through a speed reducer 46, the powder stirring wall scraping device 43 is linked with the screw machine, an alarm device 49 for detecting pipeline blockage is arranged in the material conveying pipeline 48, so that an alarm can be given out at the first time when the system is blocked, wherein the alarm device 49 can adopt a wind pressure microswitch arranged in the material conveying pipeline 48, the negative pressure is generated in the material conveying pipeline 48 under the normal material conveying condition, and when the material is blocked, the micro positive pressure is generated in the material conveying pipeline 48, and the micro switch senses and gives an alarm; the material is conveyed down to the acceleration chamber 51 by the weighing screw 42, and then is conveyed to the next process by the air conveying system 5.
As shown in fig. 4, the air supply system 5 includes an acceleration chamber 51, an air inlet 52, a speed reduction motor 53, and a reamer 54 and a ventilation pipe 55 installed in the acceleration chamber 51, the air inlet 52 is communicated with the ventilation pipe 55, one end of the ventilation pipe 55 is connected with the reamer 54, the other end is connected with the speed reduction motor 53, an outlet of the acceleration chamber 51 is connected with a section of rubber hose 57, the hose 57 is connected with a conveying pipeline (not shown), the hose 58 is sleeved with a hard pipe 58, the hard pipe 58 is connected with a vibration machine 59, and the acceleration chamber 51 is provided with a connecting port 56 in soft connection with the conveying pipeline 48; the ventilation pipe 55 is hollow inside and serves as a ventilation pipe for blowing, materials entering the acceleration chamber 51 are sprayed out at the mixture outlet 57 in an acceleration mode through wind delivery, the materials are used as a connecting shaft of the reamer 54 connected with the speed reducing motor 53, the speed reducing motor 53 rotates to drive the reamer 54 to rotate through the ventilation pipe 55, the reamer 54 can stir the materials in the acceleration chamber 51 and perform wall cleaning on the inner wall of the acceleration chamber 51, the blockage and bridging of the materials in the acceleration chamber 51 are prevented, a section of hose 57 is arranged at the outlet of the acceleration chamber 51, the hose 57 is vibrated through the hard pipe 58 by using the vibrator 59, and the original wall-sticking objects which are easily gathered at the outlet of the acceleration chamber 51 are blown off through vibration and then blown away to the conveying pipeline to be conveyed to the next process.
Weighing system 4 fixes in frame 1, and pneumatic conveying system 5 is located weighing system 4 below frame 1, and feeding system 3 is located frame 1 top, and feeding storehouse 2 has been placed to feeding system 3 top.
As shown in fig. 5, the feeding control method of the present invention has the following steps:
(a) an upper threshold value W1 and a lower threshold value W2 of the load cell 44 are set, setting values W1 and W2 are input into a PAC controller, and the rotating speed of the variable frequency motor 47 is pre-input into the PAC controller.
(b) Starting the variable frequency motor 47 to start material conveying, detecting the material reduction amount (which is a numerical difference value of the weighing sensor 41 in unit time) of the weighing hopper 41 in unit time by the weighing sensor 44, namely the actual feeding amount in unit time, feeding the actual feeding amount back to the PAC controller, and calculating the average rotating speed of the variable frequency motor 47 in unit time through an internal program; wherein the length of the unit time can be reasonably set according to the whole feeding period, such as 60S.
(c) The PAC controller compares the rotation speed of the pre-input variable frequency motor 47 with the average rotation speed of the variable frequency motor 47 in the unit time, and then adjusts the rotation speed of the variable frequency motor 47 in the next unit time of the metering screw scale 42; when the rotation speed of the pre-input variable frequency motor 47 is less than the average rotation speed of the variable frequency motor 47 in the unit time, the PAC controller finely adjusts the rotation speed of the variable frequency motor 47 of the metering spiral scale 42 to be lower, so that the feeding amount of the metering spiral scale 42 in the next unit time is reduced, and when the rotation speed of the pre-input variable frequency motor 47 is greater than the average rotation speed of the variable frequency motor 47 in the unit time, the PAC controller finely adjusts the rotation speed of the variable frequency motor 47 of the metering spiral scale 42 to be higher, so that the feeding amount of the metering spiral scale 42 in the next unit time is increased.
(d) And (c) circulating the steps (b) and (c), wherein when the value of the weighing sensor 44 is lower than W2, the feeding system 3 starts feeding to the weighing hopper 41, and when the value of the weighing sensor 44 reaches W1, the feeding system 3 stops feeding to the weighing hopper 41.
(e) And (c) circulating the steps (b), (c) and (d) until the material feeding in one feeding period is completed.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (3)
1. An air-assisted vector weighing and feeding system is characterized by comprising a rack, a feeding bin, a feeding system, a weighing system and an air-assisted system;
the feeding system comprises an anti-bridging device, a bin blanking device and a blanking motor, wherein the anti-bridging device is arranged in an inlet of the bin blanking device, and the blanking motor is connected with a blanking mechanism in the bin blanking device;
the weighing system comprises a weighing hopper, a metering spiral scale, a powder stirring and wall scraping device and a weighing sensor, wherein the weighing hopper is a spherical shell with a containing cavity inside, a feeding hole and a discharging hole are respectively arranged at the upper part and the lower part of the weighing hopper, a filter cylinder communicated with the outside is also arranged on the weighing hopper, the metering spiral scale comprises a conveying chamber and a spiral machine arranged in the conveying chamber, one end of a rotating shaft of the spiral machine is connected with a transmission case, the other end of the rotating shaft of the spiral machine is connected with a speed reducer, the speed reducer is connected with a variable frequency motor, the powder stirring and wall scraping device comprises a rotating shaft and a fixing frame crossed and connected with the rotating shaft, an arc-shaped scraping blade is connected between the rotating shaft and the two ends of the fixing frame and clings to the inner wall of the weighing hopper, the transmission case is respectively rotationally connected with the rotating shaft and the rotating shaft through an internal chain mechanism, and the feeding hole is flexibly connected with a feeder outlet of the storage bin, the discharge port is communicated with the material conveying chamber, the material conveying chamber is communicated with a material conveying pipeline at an outlet, the weighing sensor is positioned below the screw conveyor and is electrically connected with the weighing hopper, the discharging motor and an external PAC controller, and the PAC controller is electrically connected with the variable frequency motor and the discharging motor;
the air supply system comprises an acceleration chamber, an air inlet, a speed reduction motor, a reamer and a ventilation pipe, wherein the reamer and the ventilation pipe are installed in the acceleration chamber;
the weighing system is fixed on the frame, the pneumatic conveying system is arranged on the frame below the weighing system, the feeding system is arranged above the frame, and the feeding bin is arranged above the feeding system.
2. The air-assisted vector weighing and feeding system of claim 1, wherein an alarm device for detecting pipeline blockage is arranged in the material conveying pipeline.
3. A feeding control method based on the air-assisted vector weighing and feeding system of claim 1 or 2, characterized by comprising the following steps:
(a) setting an upper threshold value W1 and a lower threshold value W2 of the weighing sensor, inputting set values W1 and W2 into a PAC controller, and pre-inputting the rotating speed of the variable frequency motor on the PAC controller;
(b) starting the variable frequency motor to start material conveying, detecting the material reduction amount of a weighing hopper in unit time by a weighing sensor, namely the actual feeding amount in unit time, feeding the actual feeding amount back to a PAC controller, and calculating the average rotating speed of the variable frequency motor in unit time through an internal program;
(c) the PAC controller compares the rotating speed of the pre-input variable frequency motor with the average rotating speed of the variable frequency motor in the unit time, and then adjusts the rotating speed of the variable frequency motor in the next unit time of the metering screw scale;
(d) circulating the steps (b) and (c), in the process, when the value of the weighing sensor is lower than W2, the feeding system starts feeding materials to the weighing hopper, and when the value of the weighing sensor reaches W1, the feeding system stops feeding materials to the weighing hopper;
(e) and (c) circulating the steps (b), (c) and (d) until the material feeding in one feeding period is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710152238.XA CN108622675B (en) | 2017-03-15 | 2017-03-15 | Air-assisted vector weighing and feeding system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710152238.XA CN108622675B (en) | 2017-03-15 | 2017-03-15 | Air-assisted vector weighing and feeding system and control method |
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| CN108622675A CN108622675A (en) | 2018-10-09 |
| CN108622675B true CN108622675B (en) | 2021-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112794012A (en) * | 2021-01-29 | 2021-05-14 | 杭州可速自动化设备有限公司 | Multifunctional charging and weighing equipment |
| CN116655215B (en) * | 2023-05-16 | 2024-05-28 | 五河县维佳复合材料有限公司 | Automatic feeding system for glass fiber waste silk |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5138196Y2 (en) * | 1971-05-14 | 1976-09-18 | ||
| CN201721974U (en) * | 2010-07-21 | 2011-01-26 | 沈斌 | Micro-positive low pressure continuous pneumatic convey device |
| CN202880492U (en) * | 2012-10-22 | 2013-04-17 | 广州无疆环保设备有限公司 | Anti-blocking device of feeding machine |
| CN104085686B (en) * | 2014-07-10 | 2016-01-06 | 广东环境保护工程职业学院 | A kind of superfine powder pneumatic transport equipment that accurately can control to carry |
| CN204528198U (en) * | 2015-03-26 | 2015-08-05 | 葛洲坝荆门水泥有限公司 | A kind of Novel waistband claims blanking bin device |
| CN205269446U (en) * | 2015-11-18 | 2016-06-01 | 北京正坤博达生物饲料有限公司 | Feeds stirrer |
| CN205953078U (en) * | 2016-06-30 | 2017-02-15 | 兴化市热华能源有限公司 | Be applied to combination formula feed equipment of complicated material |
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