CN113716348A

CN113716348A - Pneumatic conveying system for continuously conveying betel nuts and having automatic cleaning function

Info

Publication number: CN113716348A
Application number: CN202111166305.6A
Authority: CN
Inventors: 朱巨才; 彭彬; 刘领; 孙志宏
Original assignee: Hunan Onyear Food Co ltd
Current assignee: Hunan Onyear Food Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-11-30
Anticipated expiration: 2041-09-30
Also published as: CN113716348B

Abstract

The invention discloses a pneumatic conveying system with an automatic cleaning function for continuously conveying betel nuts, which comprises a material supply device, at least one material and impurity separating device, a gas and dust separating device, a cleaning device and a PLC (programmable logic controller) control system which are connected, wherein the PLC control system also comprises a PLC controller, a signal input module, a signal output module and an analog quantity control module for variable frequency speed regulation, wherein the PLC controller, the signal input module, the signal output module and the analog quantity control module are electrically connected. The invention can solve the technical problems of large dust emission in a workshop, large occupied area of equipment, difficult cleaning after the equipment is dirty and easy blockage and material clamping in the conveying process of the areca nuts, thereby reducing the working intensity of workers, improving the automation level of the equipment and ensuring the cleanness and sanitation in the workshop.

Description

Pneumatic conveying system for continuously conveying betel nuts and having automatic cleaning function

Technical Field

The invention relates to the field of betel nut conveying equipment, in particular to a pneumatic conveying system with an automatic cleaning function for continuously conveying betel nuts.

Background

The betel nut is one of four southern medicines in China, is mainly produced in Guangdong and Yunnan, has the highest output in Philippines, India and Indonesia abroad, is similar to olive, is oval or spindle-shaped in appearance, is a delicious food which is well favored by consumers, has the production value of more than 700 million yuan per year in the betel nut production and processing industry, and has hundreds of thousands of workers. Areca catechu contains more than 20 kinds of trace elements, 11 kinds of trace elements necessary for human body. The semen Arecae contains total alkaloids 0.3-0.6%, mainly arecoline, and small amount of arecoline, demethylarecoline, isodemethylarecoline, arecoline and homoarecoline, all of which are present together with tannic acid. And tannin, fat, mannitol, galactose, sucrose, catechin, epicatechin, leucocyanidin, arecango red pigment, saponin, dimer, trimer, tetramer of various procyanidins, etc.

The main processing procedures in the production process of the betel nuts are about fifteen, the characteristics of betel nut materials in different procedures are greatly different, and manual work or logistics conveying lines are needed for turnover. For example, the original betel nut is relatively dry, the surface of the betel nut contains more dust, and the materials also contain more fallen betel nut flower stalks, fiber filaments and other impurities; the cooked betel nuts are wet and have a plurality of water drops on the surface; the water content of the flavored areca nuts is high, and a small amount of residual brine and ingredient mucus exist on the surfaces of the flavored areca nuts; the roasted areca nuts have high temperature and dry and comfortable appearance, but part of ingredients on the surface are dried to form tiny particles which are easy to fall off and become flying dust. Therefore, the requirements of different processes on logistics transportation equipment are also different.

At present, the main equipment for material turnover and conveying in the betel nut processing process is a belt conveyor and a chain plate conveyor, the problems of large dust emission, easy equipment pollution, difficult cleaning, large cleaning workload and large equipment occupied space in different processes in the betel nut conveying process are solved, and the betel nut production requires the workshop environment to meet the standard of a clean workshop and needs to strictly control the floating dust and the temperature and humidity of the workshop. The problems of dust raising, dirt and difficult cleaning of the conveyor are the main reasons for the unqualified workshop environment. If the conveyor is subjected to closed treatment and a dust removal system is added, the equipment investment is high, the energy consumption is high, and the cleaning difficulty in the interior of the conveyor is further increased. In order to solve the technical problem, the betel nut is conveyed by air force in a pipeline preferentially, but the phenomenon of material blockage and material blockage is easily caused when materials are conveyed because the feeding speed is easily inconsistent due to the operation of staff; the production parameters can not be recorded and inquired, which causes great difficulty to the production operation.

For example, CN201921629189.5 discloses a betel nut conveying device, including conveying frame and reposition of redundant personnel subassembly, the reposition of redundant personnel subassembly includes front end plate, back end plate and a plurality of splitter plate, and front end plate and back end plate are close to one side of conveying frame and all are equipped with a plurality of teeth at intervals, and the below of each tooth all corresponds and is provided with a splitter plate, and the interval between the adjacent teeth of front end plate is less than or equal to the interval between the adjacent teeth of back end plate. Compared with the prior art, the utility model provides a betel nut conveyor improves work efficiency. But the equipment does not solve the problems of large dust, large occupied space, small delivery amount and the like in the betel nut conveying process.

Therefore, the research and development of betel nut conveying equipment which is free of dust raising, small in equipment occupied space, easy to clean and capable of achieving automatic control is an urgent need of many betel nut processing enterprises.

Disclosure of Invention

The invention aims to solve the problems, provides a pneumatic conveying system with an automatic cleaning function for continuously conveying betel nuts, and can solve the technical problems of large dust emission in a workshop, large equipment floor area and difficulty in cleaning the equipment after the equipment is dirty in the conveying process of the betel nuts, so that the workshop environment for betel nut production is improved.

In order to realize the purpose, the invention adopts the technical scheme that: a pneumatic conveying system for continuously conveying betel nuts and having an automatic cleaning function comprises a storage bin, and the system comprises a material supply device, at least one material and impurity separating device, a gas and dust separating device, a cleaning device and a PLC (programmable logic controller) control system which are connected, wherein the material supply device comprises a material conveying conveyor, a vibration feeder, a material receiving device, a pneumatic accelerator and a feeding pipeline which are sequentially connected, the material and impurity separating device comprises a material and dust separator, an air closing valve and the storage bin which are communicated up and down, the gas and dust separating device comprises an air pipe, a first dust remover and a fan, the material and dust separator is provided with an air inlet and an air outlet, the air inlet is communicated with the feeding pipeline, and the air outlet is communicated with the air pipe;

the cleaning device comprises a cleaning water pump and a plurality of cleaning pipelines which are connected with a cleaning water tank, the water outlet ends of the cleaning pipelines are respectively connected with the starting end of the feeding pipeline, the material-dust separator and the storage bin, the storage bin is provided with a water outlet, and one of the cleaning pipelines is connected with the tail end of the feeding pipeline;

the PLC control system comprises a PLC controller, a signal input module, a signal output module and an analog quantity control module for frequency conversion and speed regulation, the signal output module also comprises a feeding and conveying system control module and a cleaning system control module, the feeding and conveying system control module is electrically connected with the material supply device, the material and impurity separation device and the gas and dust separation device, and the cleaning system control module is electrically connected with the cleaning device; the signal input module further comprises a valve signal receiving module and a wind pressure signal receiving module, and the PLC is electrically connected with the signal input module, the signal output module and the analog quantity control module.

Preferably, the analog quantity control module is respectively and electrically connected with the feeding conveyor, the vibration feeder, the fan and the air-closing valve.

Preferably, the device also comprises a shunt valve, one end of the shunt valve is communicated with a feeding pipeline of the material supply device, the other end of the shunt valve is communicated with an air inlet of a material-dust separator of any one material-impurity separation device, and an air outlet of any one material-impurity separation device is communicated with an air pipe; the water outlet end of the cleaning pipeline is communicated with the material-dust separator and the storage bin of any one material-impurity separation device, and the shunt valve is electrically connected with the valve signal receiving module.

Preferably, a feeding bin for transferring and storing materials is arranged at the top of the feeding conveyor.

Preferably, the vibration feeder comprises a trough, a linear vibrator and a vibration rack, the linear vibrator is fixedly connected to the vibration rack, the trough is arranged at the top of the linear vibrator, and the betel nut raw seeds are conveyed in a vibration trough mode.

Preferably, the receiver includes receiver main part, feeding regulating plate, adjust knob, the receiver main part is inside hollow structure, the both ends of receiver main part are equipped with respectively and communicate to inside receiver input port and receiver output port, the receiver input port is equipped with the feeding regulating plate, the both sides of feeding regulating plate are equipped with the edge the waist shape hole of receiver input port direction of height, adjust knob sets up the opening size that is used for controlling the receiver input port in the waist shape hole of feeding regulating plate both sides, and former seed of sesame oil is followed the receiver input port gets into, follows the receiver output port is discharged.

Preferably, the pneumatic accelerator comprises a first connecting body and a second connecting body, a pneumatic accelerator input port is arranged in the first connecting body, a pneumatic accelerator output port communicated with the pneumatic accelerator input port is arranged in the second connecting body, a gas buffer chamber is further arranged in the second connecting body, a cavity is formed by fixedly connecting the first connecting body and the second connecting body, a compressed air inlet hole communicated to the gas buffer chamber is formed in the outer wall of the second connecting body, a compressed air outlet hole communicated with the pneumatic accelerator output port is further arranged in the gas buffer chamber, the compressed air outlet holes are distributed in the gas buffer chamber in an annular array manner, a first annular ring groove and a second annular ring groove are formed in one end, close to the pneumatic accelerator input port, of the second connecting body, and a first annular sealing ring and a second annular sealing ring are respectively arranged in the first annular ring groove and the second annular ring groove. The first annular sealing ring and the second annular sealing ring improve the sealing performance of the first connecting body and the second connecting body after the first connecting body and the second connecting body are connected; the gas buffer chamber is communicated with the compressed air inlet hole and the compressed air outlet hole, so that the internal negative pressure of the pneumatic accelerator is enhanced.

Preferably, the device also comprises a first feeding ball valve arranged at the starting end of the feeding pipeline and a second feeding ball valve arranged at the tail end of the feeding pipeline, wherein the first feeding ball valve and the second feeding ball valve are electrically connected with the valve signal receiving module to control the on-off of the material transportation in the feeding pipeline.

Preferably, the feeding pipeline is alternatively connected by a bent pipe and a straight pipe and ascends in a step shape, the vertical distance from the lowest point of the lower end of the feeding pipeline to the highest point of the top end of the feeding pipeline is equal to the material lifting height of the pneumatic conveying system, and the further connection mode is as follows: the feeding pipeline comprises a first feeding bent pipe, a first feeding straight pipe, a second feeding bent pipe and a second feeding straight pipe which are connected in sequence; the distance between the center of the lower end flange of the first feeding bent pipe and the center of the upper port of the second feeding bent pipe is equal to the material lifting height of the pneumatic conveying system, and the further preferable height is 4.5-6m, so that the betel nuts can be conveyed to the designated position smoothly, and material blockage is prevented. If the field environment does not have the primary lifting condition, secondary lifting can be performed, and the tail end of the second feeding straight pipe is sequentially connected with a third feeding bent pipe, a third feeding straight pipe and a fourth feeding bent pipe, so that the required lifting height is achieved. If the lifting can be carried out for one time, secondary lifting or multiple times of lifting can be avoided.

Preferably, the material dirt separator still including be used for the installation the air inlet with the separator casing of gas outlet, the top of separator casing is equipped with the observation window subassembly, the bottom of separator casing still is equipped with the separator discharge gate and is used for fixing the square flange board at airlock valve top, be equipped with the pipeline of giving vent to anger in the gas outlet and be used for adjusting the altitude mixture control ring of pipeline height of giving vent to anger.

Preferably, the air-lock valve comprises an air-lock valve body, a driving motor and a transmission mechanism, wherein an air-lock valve feeding port and an observation port are formed in the top of the air-lock valve body, an air-lock valve discharging port is formed in the bottom of the air-lock valve body, the transmission mechanism and an annular transition plate are arranged on one side of the air-lock valve body, the annular transition plate is located between the air-lock valve body and the transmission mechanism, one end of the transmission mechanism is connected with the driving motor, a rotor communicated to the inside of the air-lock valve body is arranged on the other end of the transmission mechanism, a chain is arranged on the transmission mechanism, the driving motor drives the rotor to rotate through the chain on the transmission mechanism, blades distributed in an annular array are arranged on the surface of the rotor, and when the air-lock valve is in a working state, a worker can observe the inside condition of the air-lock valve body through the observation port.

Preferably, the included angle between the feeding port of the air-lock valve and the horizontal plane is 55-65 degrees, so that materials can slide into the air-lock valve body.

Preferably, the rotor surface is provided with 4-8 blades distributed in an annular array for conveying the materials in the air-lock valve body to the storage bin as soon as possible.

Preferably, this internal casing right circular arc district and the casing left circular arc district that is equipped with of airlock, the blade with casing right circular arc district with clearance between the casing left circular arc district is less than 1.5mm, strengthens airlock is under operating condition, the leakproofness of blade and casing circular arc district.

Preferably, the initiating terminal of tuber pipe is equipped with tuber pipe compensator, pneumatic butterfly valve and wind pressure detection device, pneumatic butterfly valve with the valve signal receiving module electricity is connected, wind pressure detection device is the wind pressure changer, the wind pressure changer with the wind pressure signal receiving module electricity is connected. One end of the air pipe compensator is fixedly connected with the starting end of the air pipe, the other end of the air pipe compensator is connected with an air outlet of the material-dust separator, and the pneumatic butterfly valve controls the opening and closing of the air pipe through the valve signal receiving module; the wind pressure transmitter is used for detecting internal wind pressure and transmitting a wind pressure signal to the wind pressure signal receiving module.

Preferably, the fan is electrically connected with the analog quantity control module, and the analog quantity control module is used for adjusting the frequency of the fan; the output of fan has connected gradually muffler and second dust remover, and after first dust remover in with the tuber pipe impurity rapid segregation in the high-speed gas that flows, the impurity of separation falls into the storage jar of first dust remover bottom, and gas after the edulcoration is then discharged from the gas vent at top filters the dust removal in the second dust remover, makes the gas that discharges to external world make and reach indoor emission standard, the muffler then is used for falling of fan makes an uproar.

Preferably, the top of the material-dust separator is also provided with at least three first cleaning balls, and the first cleaning balls are distributed on the material-dust separator in an annular array; the top of storage feed bin still is equipped with at least three second cleaning ball be annular array distribution on the storage feed bin, first cleaning ball and second cleaning ball all are connected with cleaning system control module electricity. When wasing material dirt separator and storage feed bin, the inner wall of material dirt separator is hugged closely to first cleaning ball, and the inner wall of storage feed bin is hugged closely to the second cleaning ball, and the sphere of cleaning ball contacts the back with rivers, forms the splash that is the arc and scatters, from last washing to material dirt separator and storage feed bin extremely down.

Preferably, the cleaning pipeline comprises a first cleaning pipeline, a second cleaning pipeline and a third cleaning pipeline, and the first cleaning pipeline is connected with the starting end of the feeding pipeline; the second cleaning pipeline is connected with the first cleaning balls on the material-dust separator and the second cleaning balls on the storage bin through a pipeline tee joint, and the third cleaning pipeline is connected with the tail end of the feeding pipeline and a water outlet of the storage bin.

Preferably, the starting end and the tail end of the feeding pipeline are respectively provided with a cleaning water inlet and a cleaning water outlet, the cleaning water inlet comprises a first flange joint, a first porous anti-blocking opening is arranged in a connecting area of the first flange joint and the starting end of the feeding pipeline, and a plurality of water inlet through holes are arranged in the first porous anti-blocking opening; the cleaning water outlet comprises a second flange joint, a second porous anti-blocking opening is arranged in a connecting area between the second flange joint and the tail end of the feeding pipeline, and a plurality of water outlet through holes are formed in the second porous anti-blocking opening. The first multi-hole bayonet-proof port of the cleaning water inlet and the second multi-hole bayonet-proof port of the cleaning water outlet can both prevent materials from being blocked at the positions in the pneumatic conveying process, and meanwhile, the first multi-hole bayonet-proof port can also be used for feeding water to clean the feeding pipeline and emptying residual water in the feeding pipeline; the second porous anti-seize port can also be used to allow the wash water in the feed line to flow from there back to the wash water tank.

Preferably, the first cleaning pipeline is provided with a first cleaning valve, a cleaning aeration valve and a blowdown valve; a second cleaning valve and a third cleaning valve are arranged on the second cleaning pipeline; a fourth cleaning valve, a fifth cleaning valve and a sixth cleaning valve are arranged on the third cleaning pipeline; the first cleaning valve, the cleaning aeration valve, the blow-down valve, the second cleaning valve, the third cleaning valve and the fourth cleaning valve are electrically connected with the valve signal receiving module. The valve signal receiving module is used for controlling the on-off of water flow of the cleaning valve, the cleaning air supplementing valve is used for controlling compressed air to enter and generate a large amount of bubbles when the feeding pipeline is cleaned, the cleaning efficiency of the feeding pipeline is improved, and the blow-down valve is used for controlling cleaning water to enter the feeding pipeline to clean and then discharge the residual cleaning water in the feeding pipeline.

Preferably, a seventh cleaning valve for controlling the on-off of water flow is arranged between the cleaning water tank and the cleaning water pump.

Preferably, the PLC control system further includes a PLC communication module, and the PLC communication module is electrically connected to the PLC controller. Through a local area network arranged by an Ethernet switch, a worker can implement remote control on the PLC control system through a central control system and an HMI control interface.

Compared with the prior art, the pneumatic conveying system for continuously conveying the betel nuts comprises a connected material supply device, at least one material and impurity separating device, a gas and dust separating device, a cleaning device and a PLC (programmable logic controller) control system, wherein each part has the following advantages:

(1) the material feeding device has the advantages that: the technical problem that the chain scraper conveyor occupies a large area is solved, meanwhile, the areca original seeds are continuously conveyed in a negative pressure environment generated by a fan, and the single conveying capacity is large.

(2) The material and impurity separating device has the advantages that: the negative pressure generated by the fan effectively absorbs impurities such as betel nut flower stalks, fiber filaments and the like on the original betel nut seeds, the impurities are transferred to the air-dust separation device through the air outlet of the material-dust separator, the material-impurity separation of the original betel nut seeds is realized, and the original betel nut seeds after the impurities are separated are collected into the storage bin along the air-tight valve.

(3) The gas-dust separation device has the advantages that: the impurity that obtains after the separation collects the centralized processing in the middle of the dust remover again, has solved the big technical problem that leads to the workshop sanitation not up to standard of raise dust, has improved the clean and tidy degree in workshop, has ensured staff's in the workshop physical and mental health.

(4) The cleaning device has the advantages that: can implement effective cleanness to conveying pipeline, material dirt separator and storage feed bin, prevent that the sesame oil from taking place secondary pollution in conveying pipeline, and need not manual cleaning, reduce labourer's the washing degree of difficulty, the sewage after the washing can be retrieved centralized processing, avoids polluting external environment to accord with the environmental protection requirement.

(5) The PLC control system has the advantages that: the problems that the feeding speed is inconsistent easily caused by the operation of staff, and the phenomena of material blockage and material blockage are easily caused during the conveying are solved; the technical problems that the existing equipment is difficult to clean, long in cleaning time and unqualified in equipment sanitation are solved, and therefore manual operation is reduced.

The equipment is compact in arrangement and small in occupied space, and the layout of the equipment in a workshop is favorably optimized; the betel nuts can be continuously conveyed in a pneumatic conveying mode, the single conveying capacity is large, and a conveying line can be freely selected; meanwhile, dust in the betel nuts can be removed, and the betel nuts are uniformly treated after being collected in a centralized manner, so that the technical problem that the environmental sanitation is not up to the standard due to large dust raising in a workshop is solved, the cleanliness of the workshop is improved, and the production environment of the betel nut workshop is improved; the cleaning difficulty is greatly reduced due to the arrangement of the cleaning device; and realizes the automatic conveying, the material and impurity separation, the gas and dust separation and the automatic cleaning of the betel nuts through a PLC control system, and improves the automation level of the pneumatic conveying of the betel nuts.

Drawings

FIG. 1 is a general view of the apparatus connection of the present invention;

FIG. 2 is a schematic diagram of the connection of the apparatus according to embodiment 2 of the present invention;

FIG. 3 is a schematic view of a vibrating feeder;

FIG. 4 is a schematic view of the structure of the receiver;

FIG. 5 is a schematic diagram of a pneumatic accelerator;

FIG. 6 is a schematic view of a purge inlet;

FIG. 7 is a schematic view of the structure of the cleaning water outlet;

FIG. 8 is a schematic view of a dust separator;

FIG. 9 is a schematic structural view of a wind-blocking valve;

FIG. 10 is a schematic view of the internal structure of the airlock valve;

FIG. 11 is a schematic diagram of the control system connections of the present invention;

FIG. 12 is a detailed schematic diagram of an embodiment of the present invention;

FIG. 13 is a flow chart of the present invention.

The text labels in the figures are represented as: 1. a feed conveyor; 2. a feeding bin; 3. vibrating the feeder; 301. a trough; 302. a linear vibrator; 303. vibrating the frame; 4. a material receiver; 401. a receiver body; 402. a feeding adjusting plate; 403. adjusting a knob; 5. a pneumatic accelerator; 501. a first connecting body; 502. fastening a bolt; 503. a first annular seal ring; 504. compressed air enters the hole; 505. a second connector; 506. a compressed air outlet; 507. a gas buffer chamber; 508. a second annular seal ring; 509. a pneumatic accelerator input port; 510. an output port of the pneumatic accelerator; 6. a first feed ball valve; 7. cleaning the water inlet; 701. a first flange joint; 702. a first porous bayonet-resistant; 8. a first feed bend; 9. a first straight feed pipe; 10. a second feeding bent pipe; 11. a second straight feed pipe; 12. cleaning a water outlet; 1201. a second flange joint; 1202. a second porous bayonet-proof; 13. a second feed ball valve; 14. a third purge valve; 15. a first cleaning ball; 16. a material dust separator; 1601. a separator housing; 1602. an air inlet; 1603. an air outlet; 1604. an observation window assembly; 1605. a height adjustment ring; 1606. an air outlet pipe; 1607. a separator discharge port; 1608. a square flange plate; 17. an air-lock valve; 1701. closing an air valve feeding port; 1702. a drive motor; 1703. a transmission mechanism; 1704. an annular transition plate; 1705. a rotor; 1706. a blade; 1707. a right circular arc area of the shell; 1708. a viewing port; 1709. a left arc area of the shell; 1710. a discharge hole of an air-tight valve; 18. a second cleaning ball; 19. a second purge valve; 20. a storage bin; 21. an air duct compensator; 22. a pneumatic butterfly valve; 23. a wind pressure transmitter; 24. an air duct; 25. a first dust remover; 26. a second dust remover; 27. a fan; 28. a muffler; 29. cleaning the air supply valve; 30. a blowoff valve; 31. a first purge valve; 32. an eighth purge valve; 33. cleaning the water pump; 34. a seventh purge valve; 35. cleaning the water tank; 36. a fourth purge valve; 37. a third feeding bent pipe; 38. a third straight feeding pipe; 39. a fourth feeding bent pipe; 40. a shunt valve; 41. a fifth purge valve; 42. a sixth purge valve; 43. a first cleaning pipe; 44. a second cleaning pipe; 45. and thirdly, cleaning the pipeline.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

Example 1

As shown in fig. 1, 11 and 12, a pneumatic conveying system with an automatic cleaning function for continuously conveying betel nuts comprises a material supply device, at least one material and impurity separating device, a gas and dust separating device and a cleaning device which are connected, and further comprises a PLC control system, wherein the material supply device comprises a material conveying machine 1, a vibration feeder 3, a material receiver 4, a pneumatic accelerator 5 and a conveying pipeline which are connected in sequence, the material and impurity separating device comprises a material and dust separator 16, an air-closing valve 17 and a storage bin 20 which are communicated up and down, the gas and dust separating device comprises a wind pressure detecting device, a first dust remover 25 and a fan 27 which are connected by a wind pipe 24, the material and dust separator 16 is provided with a gas inlet 1602 and a gas outlet 1603, the gas inlet 1602 is communicated with the conveying pipeline, and the gas outlet 1603 is communicated with the wind pipe 24; the cleaning device comprises a cleaning water tank 35, a cleaning water pump 33 and a plurality of cleaning pipelines which are connected, the water outlet ends of the cleaning pipelines are respectively connected with the starting end of the feeding pipeline, the material-dust separator 16 and the storage bin 20, a water outlet is arranged on the storage bin 20, one cleaning pipeline is connected with the tail end of the feeding pipeline, and the cleaning device is used for automatically cleaning and sterilizing the feeding pipeline and the material-impurity separating device; the PLC control system comprises a PLC controller, a signal input module, a signal output module and an analog quantity control module for frequency conversion and speed regulation, the signal output module also comprises a feeding and conveying system control module and a cleaning system control module, the feeding and conveying system control module is electrically connected with the material supply device, the material and impurity separation device and the gas and dust separation device, and the cleaning system control module is electrically connected with the cleaning device; the signal input module further comprises a valve signal receiving module and a wind pressure signal receiving module, and the PLC is electrically connected with the signal input module, the signal output module and the analog quantity control module. The PLC control system further comprises a PLC communication module, the PLC communication module is electrically connected with the PLC controller, and through a local area network arranged by the Ethernet switch, a worker can implement remote control on the PLC control system through the central control system and the HMI control interface.

The feeding conveyor 1 is electrically connected with the analog quantity control module, the top of the feeding conveyor 1 is provided with a feeding bin 2 for transferring and storing materials, when manual direct feeding is adopted, a feeding hopper with a smaller volume can be designed to facilitate manual feeding, and when a lifting machine or a conveyor is adopted for feeding, the feeding hopper can be designed to be 1.5-20m³And the large-capacity storage bin is used for storing more materials.

As shown in fig. 3, the vibrating feeder 3 is electrically connected to the analog quantity control module, the vibrating feeder 3 includes a trough 301, a linear vibrator 302, and a vibrating frame 303, the linear vibrator 302 is fixedly connected to the vibrating frame 303, the trough 301 is disposed at the top of the linear vibrator 302, the material is accelerated primarily by linear vibration, and the material is conveyed to the receiver 4 quickly and uniformly.

As shown in fig. 4, the receiver 4 is installed at the discharge end of the vibrating feeder 3, the receiver 4 includes a receiver main body 401, a feeding adjustment plate 402, and an adjustment knob 403, the receiver main body 401 is an internal hollow structure, two ends of the receiver main body 401 are respectively provided with a receiver input port and a receiver output port communicated to the inside, the receiver input port is rectangular, and is spaced 5-40mm from the end surface of the trough 301 of the vibrating feeder 3; the output port of the receiver is circular and is fixedly connected to the input port 509 of the pneumatic accelerator. The material receiver input port still is equipped with feeding regulating plate 402, the both sides of feeding regulating plate 402 are equipped with the edge the waist shape hole of material receiver input port direction of height, adjust knob 403 sets up the opening size that is used for controlling the material receiver input port in the waist shape hole of feeding regulating plate 402 both sides compresses tightly and fixes simultaneously feeding regulating plate 402 to can find best input port height, realize neither putty can inhale the material with the highest efficiency again.

As shown in fig. 5, the pneumatic accelerator 5 functions as: the negative pressure airflow formed by spraying the compressed air sucks the material from one end, and then the material is mixed with the compressed air and sprayed out from the other end in an accelerating manner, so that the material entering the feeding pipeline has high initial speed. The pneumatic accelerator 5 comprises a first connecting body 501 and a second connecting body 505, wherein a pneumatic accelerator input port 509 is arranged in the first connecting body 501, a pneumatic accelerator output port 510 communicated with the pneumatic accelerator input port 509 is arranged in the second connecting body 505, a gas buffer chamber 507 is further arranged in the second connecting body 505, the gas buffer chamber 507 is formed by the fixed connection of the first connecting body 501 and the second connecting body 505, and specifically is an annular cavity (the fixed connection is that the first connecting body 501 is connected with the second connecting body 505 by 4-12 fastening bolts 502 distributed in an annular array), the second connecting body 505 is provided with a compressed air inlet hole 504 communicated with the gas buffer chamber 507 on the outer wall thereof, and the compressed air inlet hole 504 is a threaded hole for accessing compressed air; the gas buffer chamber 507 is also provided with compressed air outlet holes 506 communicated with the pneumatic accelerator output port 510, the compressed air outlet holes 506 are distributed in the gas buffer chamber 507 in an annular array, the number of the compressed air outlet holes is generally 4-32, and the diameter of the compressed air outlet holes is 1-3 mm. A first annular ring groove and a second annular ring groove are formed in one end, close to the pneumatic accelerator input port 509, of the second connecting body 505, and a first annular sealing ring 503 and a second annular sealing ring 508 are respectively arranged in the first annular ring groove and the second annular ring groove to play a role in sealing. The tail end of the input port 509 of the pneumatic accelerator is provided with a first quick-connection flange which is connected with the output port of the material receiver, the inner diameter of the first quick-connection flange is equal to that of the output port of the material receiver, and then the first quick-connection flange is gradually reduced so that materials can pass smoothly and collision damage is reduced; the tail end of the output port 510 of the pneumatic accelerator is provided with a second quick-connection flange which is connected with the first feeding ball valve 6, and the inner diameter of the second quick-connection flange is equal to that of the first feeding ball valve 6.

The working principle of the pneumatic accelerator 5 is as follows: compressed air enters the annular gas buffer chamber 507 from the compressed air inlet holes 504, and is rapidly ejected out from the plurality of compressed air outlet holes 506 distributed in the annular array to the pneumatic accelerator output port 510, so that a negative pressure zone is formed near the pneumatic accelerator input port 509, negative pressure airflow is generated to suck materials into the center of the second connecting body 505, and the materials are mixed with the rapidly ejected compressed air, so that the materials are rapidly accelerated and ejected out from the pneumatic accelerator output port 510.

The feeding pipeline is formed by alternately connecting bent pipes and straight pipes, and particularly comprises a first feeding bent pipe 8, a first feeding straight pipe 9, a second feeding bent pipe 10 and a second feeding straight pipe 11 which are sequentially connected and used for forming a pneumatic conveying channel, so that materials can stably and quickly reach the material-dust separator 16 through the feeding pipeline. The inner diameters of all components of the feeding pipeline are required to be consistent, and when the raw areca nuts and semi-finished products are conveyed, the inner diameters of all the components of the feeding pipeline are phi 100-phi 170 mm. The distance between the center of the lower end flange of the first feeding bent pipe 8 and the center of the upper port of the second feeding bent pipe 10 is equal to the material lifting height of a pneumatic conveying system, and the preferred height is 4.5-6m, so that the betel nuts can be conveyed to the designated position smoothly. The head end of the first feeding bent pipe 8 is provided with a first feeding ball valve 6 which is fixedly connected between the first feeding bent pipe 8 and the pneumatic accelerator 5 through a fast-assembling clamp; the tail end of the second feeding straight pipe 11 is provided with a second feeding ball valve 13 which is fixedly connected to an air inlet 1602 of the material-dust separator 16 through a fast-assembling clamp, and the first feeding ball valve 6 and the second feeding ball valve 13 are electrically connected with the valve signal receiving module to control the on-off of material transportation in the feeding pipeline.

As shown in fig. 6 and 7, the beginning end and the end of the feeding pipeline are respectively provided with a cleaning water inlet 7 and a cleaning water outlet 12, so that water flows in from the cleaning water inlet 7 and flows out from the cleaning water outlet 12, and the whole feeding pipeline is cleaned. The cleaning water inlet 7 comprises a first flange joint 701, a first porous anti-blocking opening 702 is arranged in a connecting area of the first flange joint 701 and the starting end of the feeding pipeline, and a plurality of water inlet through holes with the diameter of 2-6mm are arranged in the first porous anti-blocking opening 702; the cleaning water outlet 12 comprises a second flange joint 1201, a second porous anti-blocking port 1202 is arranged in a connecting area of the second flange joint 1201 and the tail end of the feeding pipeline, and a plurality of water outlet through holes with the diameter of 2-6mm are arranged in the second porous anti-blocking port 1202. The first porous bayonet 702 of the cleaning water inlet 7 and the second porous bayonet 1202 of the cleaning water outlet 12 can both prevent materials from being blocked at the positions in the pneumatic conveying process, and the first porous bayonet 702 can also be used for cleaning a feeding pipeline by feeding water and emptying residual water in the feeding pipeline; the second porous anti-bayonet 1202 also serves to allow the wash water in the feed line to flow back to the wash water tank 35 from there.

As shown in fig. 8, the material-dust separator 16 is in a cylindrical structure, the inner diameter of the air inlet 1602 on one side of the material-dust separator 16 is the same as the inner diameter of the feeding pipeline, the air outlet 1603 is located in the center of the top of the material-dust separator 16 and is in a cylindrical shape, the upper portion of the air outlet is a flange, and the bottom of the air outlet is provided with a circle of inward-protruding steps for conveying materials into the material-dust separator 16 and upwards sucking impurities in the betel nut raw seeds. The material-dust separator 16 further comprises a separator housing 1601 for mounting the air inlet 1602 and the air outlet 1603, an observation window assembly 1604 is arranged at the top of the separator housing 1601, and the observation window assembly 1604 is composed of transparent glass, a pressure ring, a sealing ring and a fastening bolt and is used for observing the material state in the material-dust separator 16; the separator is characterized in that a separator discharge port 1607 and a square flange plate 1608 used for being fixed to the top of the air closing valve 17 are arranged at the bottom of the separator shell 1601, the separator discharge port 1607 is communicated with an air closing valve feeding port 1701, conveyed betel nuts enter the air closing valve 17 from the separator discharge port 1607, an air outlet pipeline 1606 and a height adjusting ring 1605 used for adjusting the height of the air outlet pipeline 1606 are arranged in the air outlet 1603, the height adjusting ring 1605 is installed on a step protruding from the lower portion of the air outlet 1603, and zero or more circular rings with different heights are installed and used for adjusting the relative height of the lower end face of the air outlet pipeline 1606, so that impurities such as flower bases, fiber filaments and the like in materials can be fully separated from the betel nuts as much as possible. The outlet pipe 1606 may be suspended within the height adjustment ring 1605 or the outlet 1603 by a protruding step when installed.

The top of the material-dust separator 16 is also provided with at least three first cleaning balls 15, and the first cleaning balls are distributed on the material-dust separator 16 in an annular array; the top of the storage bin 20 is further provided with at least three second cleaning balls 18, the storage bin 20 is distributed in an annular array, and the first cleaning balls 15 and the second cleaning balls 18 are connected with the water outlet end of the cleaning pipeline and electrically connected with the cleaning system control module. The cleaning balls are controlled to be tightly attached to the inner walls of the material-dust separator 16 and the storage bin 20, so that large water splash is formed after the spherical surface is contacted with water flow, and the material-dust separator 16, the air-lock valve 17 and the storage bin 20 are cleaned from top to bottom.

As shown in fig. 9 and 10, the air-lock valve 17 is electrically connected to the analog quantity control module, the air-lock valve 17 includes an air-lock valve body, a driving motor 1702, and a transmission 1703, the top of the air-lock valve body is provided with an air-lock valve inlet 1701 and an observation port 1708, the bottom of the air-lock valve body is provided with an air-lock valve outlet 1710, one side of the air-lock valve body is provided with the transmission 1703 and an annular transition plate 1704, the annular transition plate 1704 is located between the air-lock valve body and the transmission 1703, one end of the transmission 1703 is connected to the driving motor 1702, the other end is provided with a rotor 1705 communicated to the inside of the air-lock valve body, the transmission 1703 is provided with a chain, the driving motor 1702 drives the rotor 1705 to rotate through the chain on the transmission 1703, the surface of the rotor 1705 is provided with blades 1706 distributed in an annular array, the blades 1706 are 4-8 pieces, for transporting the material in the airlock body to the storage silo 20 as quickly as possible.

The angle between the inlet 1701 of the airlock and the horizontal plane is 55-65 degrees, so that the material can slide into the airlock body. The air-tight valve is characterized in that a shell right circular arc area 1707 and a shell left circular arc area 1709 are arranged in the air-tight valve body, gaps between the blades 1706 and the shell right circular arc area 1707 and between the blades 1706 and the shell left circular arc area 1709 are smaller than 1.5mm, and the sealing performance between the blades 1706 and the shell circular arc area is enhanced when the air-tight valve 17 is in a working state.

The initiating terminal of tuber pipe 24 is equipped with tuber pipe compensator 21, pneumatic butterfly valve 22 and wind pressure detection device, pneumatic butterfly valve 22 with the valve signal receiving module electricity is connected, wind pressure detection device is wind pressure changer 23, wind pressure changer 23 with the wind pressure signal receiving module electricity is connected. Wherein air duct compensator 21 one end is connected on air duct 24, and the other end is connected on the gas outlet of material dirt separator 16, pneumatic butterfly valve 22 is used for control the break-make of negative pressure air current in the conveying pipeline, wind pressure changer 23 is used for detecting inside wind pressure to on transmitting the wind pressure signal to wind pressure signal receiving module.

The first dust remover is preferably a cyclone dust remover, and the second dust remover is preferably a pulse dust remover.

The valve signal receiving module is electrically connected with the electromagnetic valve, and the wind pressure signal receiving module is electrically connected with the wind pressure detection device. The electromagnetic valves comprise a first feed ball valve 6, a second feed ball valve 13, a pneumatic butterfly valve 22, a first cleaning valve 31, a cleaning aeration valve 29, a blowdown valve 30, a second cleaning valve 19, a third cleaning valve 14, a fourth cleaning valve 36 and a shunt valve 40.

The fan 27 is electrically connected with the analog quantity control module, the output end of the fan 27 is sequentially connected with a silencer 28 and a second dust remover 26, the silencer 28 is used for reducing noise of the fan 27, the second dust remover 26 is used for filtering and removing dust in the second dust remover 26 after impurities are removed by the first dust remover 25, and gas is discharged from the gas outlet at the top to the second dust remover 26, so that the gas discharged to the outside reaches the indoor discharge standard.

The cleaning pipeline comprises a first cleaning pipeline 43, a second cleaning pipeline 44 and a third cleaning pipeline 45, the first cleaning pipeline 43 is connected with the starting end of the feeding pipeline, the second cleaning pipeline 44 is connected with the first cleaning balls 15 on the material-dust separator 16 and the second cleaning balls 18 on the storage bin 20 through a three-way joint, and the third cleaning pipeline 45 is connected with the tail end of the feeding pipeline.

The cleaning water used for cleaning the material dust separator and the storage bin can be directly discharged from a water outlet in the storage bin, and can also be communicated with a cleaning pipeline and reflows into the water tank for reuse. Therefore, as a further proposal, the water outlet in the storage bin can be communicated with the water tank through a cleaning pipeline to form a backflow.

The first cleaning pipeline 43 is also provided with a first cleaning valve 31, a cleaning aeration valve 29 and a blowdown valve 30; the second cleaning pipeline 44 is also provided with a second cleaning valve 19 and a third cleaning valve 14; and a fourth cleaning valve 36, a fifth cleaning valve 41 and a sixth cleaning valve 42 are further arranged on the third cleaning pipeline 45. The first cleaning valve 31, the cleaning aeration valve 29, the blowdown valve 30, the second cleaning valve 19, the third cleaning valve 14 and the fourth cleaning valve 36 are electrically connected with the valve signal receiving module. The other end of the cleaning air compensation valve 29 is connected with a compressed air pipeline and is used for controlling compressed air to enter and generate a large amount of bubbles when the feeding pipeline is cleaned, so that the cleaning efficiency of the feeding pipeline is improved, and the first cleaning valve 31 and the blow-down valve 30 are respectively used for controlling cleaning water to enter the feeding pipeline for cleaning and discharging residual cleaning water in the feeding pipeline out of the pipeline; the second purge valve 19 and the third purge valve 14 are respectively used for controlling the purge water to enter the dust separator 16 and the storage bin 20 for purging; the fourth cleaning valve 36, the fifth cleaning valve 41 and the sixth cleaning valve 42 are used for controlling the sewage after the cleaning to flow back to the cleaning water tank 35.

The washing water tank 35 is an open water tank for storing washing water solution. A seventh cleaning valve 34 for controlling the on-off of water flow is arranged between the cleaning water tank 35 and the cleaning water pump 33, and an eighth cleaning valve 32 is arranged at the joint of the cleaning water pump 33 and the water outlet end of the cleaning pipeline and used for manual regulation and control.

The cleaning water tank 35 is used for conveying water into the cleaning pipeline, the cleaning water pump 33 is used for providing power for water flow conveying, water flow in the first cleaning pipeline 43 enters from the cleaning water inlet 7 and flows out from the cleaning water outlet 12, and cleaning of the feeding pipeline is implemented; the second cleaning pipeline 44 acts on the material-dust separator 16 and the storage bin 20 through a pipeline tee joint, and the cleaned sewage flows out from a water outlet on the storage bin 20; the third cleaning pipe 45 is connected to the cleaning water outlet 12 at the end of the feed pipe, and after cleaning is completed, the fourth cleaning valve 36 is opened to allow the sewage to flow back to the cleaning water tank 35, thereby preventing the sewage from polluting the external environment.

The PLC control system is used for automatically controlling and monitoring the feeding conveying system and the automatic cleaning system, and realizes the functions of one-key starting operation, automatic pipe blockage prevention and automatic cleaning, so that the feeding conveying system can continuously and stably operate. The PLC is the brain of an electrical control system and is used for connecting and controlling electrical elements of each terminal, so as to realize automatic control, monitoring, alarming and communication connection with a central control system; the one-key starting is that the PLC control system automatically controls the action sequence of each part according to the logical relation of starting and stopping of each part of the material conveying system to realize automatic operation; the automatic anti-blocking pipe is characterized in that the PLC control system automatically controls the feeding speed of the feeding conveyor 1 and the feeding speed of the vibrating feeder 3 through the pressure value detected by the wind pressure transmitter 23, when the detected pressure is lower than a set value, feeding is slowed down or stopped, and when the pressure is recovered to be higher than the set value, feeding is accelerated. The automatic cleaning is realized by the PLC control system automatically starting the cleaning water pump 33, the cleaning valves and other components according to the logic relation according to the states of all parts of the cleaning system, so as to automatically clean and sterilize the feeding pipeline, the material dust separator 16, the air-lock valve 17 and the storage bin 20.

The method comprises the steps of setting process production path requirements through a PLC control system, controlling a first feeding ball valve 6, a second feeding ball valve 13, an air closing valve 17, a pneumatic butterfly valve 22, a first cleaning valve 31, a cleaning air supplementing valve 29, a blow-down valve 30, a second cleaning valve 19, a third cleaning valve 14 and a shunt valve 40, executing opening/closing actions according to corresponding process paths, collecting running state signals of all electrical elements and transmitting the signals to a signal input module, and judging whether a starting path is consistent with a selected process path or not according to feedback signals by the PLC control system. PLC control system passes through signal output module control material feeding device, material miscellaneous separator, gas dust separator and belt cleaning device, start material feeding conveyor 1, vibration feeder 3, fan 27, second dust remover 26, gather the pressure data transfer analog control module in the strength pipeline in real time according to wind pressure changer 23, signal output module controls the frequency of converter in the material feeding conveyor 1 through the wind pressure control of survey, control material feeding conveyor 1 reduces the input speed when the pressure value of wind pressure risees, prevent that the feeding from piling up and producing putty, the card material condition. The cleaning device controls the action of the cleaning valve through the signal output module, controls the cleaning air supplement valve 29 to supplement air bubbles into the first cleaning pipeline 43, and automatically finishes sewage discharge and opens the second round of cleaning after soaking is finished regularly.

Example 2

As shown in fig. 2, a pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts is different from embodiment 1 in that: limited by the factory environment, the feeding pipeline is difficult to lift to the target height at one time, so that the bent pipes and the straight pipes are connected in an alternating mode and rise in a stepped mode for 2 times, the first lifting is about 4.5 meters, and the second lifting is about 1.5 meters, so that the target height is achieved. Therefore, the end of the second straight feeding pipe 11 is further connected with a third bent feeding pipe 37, a third straight feeding pipe 38 and a fourth bent feeding pipe 39 in sequence for second lifting.

The valve further comprises a shunt valve 40, and the shunt valve 40 is electrically connected with the valve signal receiving module. One end of the shunt valve 40 is communicated with a feeding pipeline of the material supply device, the other end of the shunt valve is communicated with an air inlet 1602 of the material-dust separator 16 of any one material-impurity separation device, an air outlet 1603 of any one material-impurity separation device is communicated with the air pipe 24, an water outlet end of the cleaning pipeline is communicated with the material-dust separator 16 of any one material-impurity separation device and the storage bin 20, and a third cleaning pipeline 45 of the cleaning device is further provided with a fifth cleaning valve 41 and a sixth cleaning valve 42.

Through the arrangement of the branch valves 40, the feeding pipeline is divided into a plurality of pipeline branches to be connected to the material-dust separators 16, so that a plurality of sets of areca nut pneumatic conveying equipment and automatic cleaning equipment are formed. The rest parts are all the same as the structure of the embodiment 1.

As shown in fig. 13, the specific operation flow of the present invention is: firstly, setting a PLC control system into a production mode, selecting a production process path opening action mode, opening a first feeding ball valve 6 and a second feeding ball valve 13, enabling a feeding pipeline to be in a pneumatic conveying mode state, and determining whether the actions are consistent or not through state input signals of the first feeding ball valve 6 and the second feeding ball valve 13; opening the pneumatic butterfly valve 22 and the air-lock valve 17 corresponding to the bin number according to the selected bin number, inputting a signal corresponding to the bin number according to the fed back state, ensuring that the pneumatic butterfly valves 22 and the air-lock valves 17 of other bin numbers are in a closed state, and setting the frequency of a frequency converter of the air-lock valve 17 to be 30Hz for starting; after the path selection matching is judged to be completed, the first dust remover 25 and the second dust remover 26 are started to ensure that the fan 27 absorbs materials after being started, the frequency of the fan 27 is set to 35Hz for starting, the rapid formation of the air pressure in the pipeline is ensured, and the change of the air pressure is monitored in real time through the air pressure transmitter 23; starting the vibration feeder 3 and the feeding conveyor 1 when the wind pressure reaches-5.5 KPa, setting the feeding starting speed of the feeding conveyor 1 to be 40Hz for starting, keeping the wind pressure at about-8 KPa in a full load state, regulating the feeding speed at any time according to a wind pressure monitoring value after the starting is finished, regulating the feeding speed in a range from-8 KPa to-15 KPa according to the wind pressure monitoring, when the wind pressure is from-5.5 KPa to-8 KPa, keeping the feeding frequency constant at 40Hz for operation, when the wind pressure is from-8 KPa to-15 KPa, detecting the wind pressure conversion rate in a 10 second period, controlling the feeding speed to be linearly changed and regulated in a range from 40Hz to 20Hz, stopping feeding when the wind pressure exceeds-15 KPa, and sending an alarm, so that the phenomena of material blockage caused by material difference and manual operation misoperation in the feeding process can be effectively solved through the linear regulation, meanwhile, the storage state of the storage bin is monitored in real time through a weight transmitter in the storage bin 20, and an operator is reminded of the feeding state.

After the raw betel nut seeds or semi-finished product materials enter the material-dust separator 16, impurities such as betel nut flower stalks, fiber filaments and dust contained in the raw betel nut seeds are absorbed by the air outlet 1603 and the air outlet pipeline 1606 of the material-dust separator 16, then fall into the air-tight valve 17, and are conveyed into the storage bin 20 through the air-tight valve discharge hole 1710. A fan 27 in the gas-dust separating device provides power for the material-dust separator 16 to absorb impurities in the betel nut raw seeds, the impurities absorbed by the material-dust separator 16 are discharged into the first dust remover 25 through the air pipe 24, the first dust remover 25 separates the impurities in the high-speed flowing gas, the gas after the impurities are separated is discharged into the second dust remover 26 to be filtered and dedusted, and the gas discharged to the outside reaches the indoor discharge standard. After the raw betel nut seeds are conveyed and the impurities are separated, the raw betel nut seeds are discharged from the storage bin 20 to a discharging hopper at the bottom end.

In the layered material supply stopping device after feeding is completed, the feeding conveyor 1 is firstly delayed for 5s and stopped, and then the vibrating feeder 3, the first dust remover 25, the fan 27 and the second dust remover 26 are stopped after being delayed for 18 s.

After production is finished, switching to an automatic cleaning mode, controlling the first feeding ball valve 6 and the second feeding ball valve 13 to be in a cleaning mode state, starting a cleaning water inlet 7, a cleaning water outlet 12, a first cleaning valve 31, an eighth cleaning valve 32 and a fourth cleaning valve 36, starting a cleaning water pump 33 after valve signal feedback is finished, starting a cleaning air supplementing valve 29 after 4min to soak water flow for 10min, and ensuring steam bubble input all the time during soaking; and (3) closing the cleaning water pump 33 and the cleaning aeration valve 29, opening the drain valve for 30 min, and then performing secondary cleaning, wherein the cleaning water added with detergent is used for the first cleaning, and the cleaning water is directly used for the second cleaning. And simultaneously opening a fifth cleaning valve 41 and a sixth cleaning valve 42 to clean the material distribution gate, wherein the cleaning time is 20min, all the cleaning valves stop moving after the time is up, and the whole cleaning process is finished.

After the cleaning, the cleaning water flows back to the cleaning water tank 35 through the third cleaning pipeline 45, and finally the cleaning water is subjected to centralized treatment, so that the pollution of the cleaning water to the external environment is prevented.

In the production and cleaning processes, parameters and data can be transmitted and stored in the central control system, and workers can inquire the stored parameters and data on the HMI control interface.

It is to be noted that, in the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the present invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the invention.

Claims

1. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts comprises a storage bin (20), it is characterized in that the system comprises a material supply device, at least one material and impurity separation device, a gas and dust separation device, a cleaning device and a PLC control system which are connected, the material feeding device comprises a feeding conveyor (1), a vibrating feeder (3), a material receiver (4), a pneumatic accelerator (5) and a feeding pipeline which are connected in sequence, the material and impurity separating device comprises a material and dust separator (16), an air-tight valve (17) and a storage bin (20) which are communicated up and down, the gas-dust separation device comprises an air pipe (24), a first dust remover (25) and a fan (27), the material-dust separator (16) is provided with an air inlet (1602) and an air outlet (1603), the air inlet (1602) is communicated with the feeding pipeline, and the air outlet (1603) is communicated with the air pipe (24);

the cleaning device comprises a cleaning water pump (33) and a plurality of cleaning pipelines which are connected with a cleaning water tank (35), the water outlet ends of the cleaning pipelines are respectively connected with the starting end of the feeding pipeline, the material-dust separator (16) and the storage bin (20), a water outlet is arranged on the storage bin (20), and one cleaning pipeline is connected with the tail end of the feeding pipeline;

2. The pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1, wherein: the analog quantity control module is respectively and electrically connected with the feeding conveyor (1), the vibration feeder (3), the fan (27) and the air-closing valve (17).

3. The pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1, wherein: the device is characterized by further comprising a shunt valve (40), wherein one end of the shunt valve (40) is communicated with a feeding pipeline of a material supply device, the other end of the shunt valve (40) is communicated with an air inlet (1602) of a material-dust separator (16) of any one material-impurity separating device, and an air outlet (1603) of any one material-impurity separating device is communicated with an air pipe (24); the water outlet end of the cleaning pipeline is communicated with a material-dust separator (16) and a storage bin (20) of any one material-impurity separation device; the shunt valve (40) is electrically connected with the valve signal receiving module.

4. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the vibration feeder (3) comprises a trough (301), a linear vibrator (302) and a vibration rack (303), wherein the linear vibrator (302) is fixedly connected to the vibration rack (303), and the trough (301) is arranged at the top of the linear vibrator (302).

5. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the material receiver (4) comprises a material receiver main body (401), a feeding adjusting plate (402) and an adjusting knob (403), the material receiver main body (401) is of an internal hollow structure, two ends of the material receiver main body (401) are respectively provided with a material receiver input port and a material receiver output port which are communicated to the inside, the material receiver input port is provided with the feeding adjusting plate (402), two sides of the feeding adjusting plate (402) are provided with edges in waist-shaped holes in the height direction of the material receiver input port, and the adjusting knob (403) is arranged in the waist-shaped holes in two sides of the feeding adjusting plate (402) and used for controlling the opening size of the material receiver input port.

6. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the pneumatic accelerator (5) comprises a first connecting body (501) and a second connecting body (505), a pneumatic accelerator input port (509) is arranged in the first connecting body (501), a pneumatic accelerator output port (510) communicated with the pneumatic accelerator input port (509) is arranged in the second connecting body (505), a gas buffer chamber (507) is further arranged in the second connecting body (505), and the gas buffer chamber (507) is formed by fixedly connecting the first connecting body (501) and the second connecting body (505); the outer wall of the second connecting body (505) is provided with a compressed air inlet hole (504) communicated to the gas buffer chamber (507), the gas buffer chamber (507) is further internally provided with a compressed air outlet hole (506) communicated with the pneumatic accelerator output port (510), the compressed air outlet holes (506) are distributed in the gas buffer chamber (507) in an annular array manner, one end, close to the pneumatic accelerator input port (509), of the second connecting body (505) is provided with a first annular ring groove and a second annular ring groove, and the first annular ring groove and the second annular ring groove are respectively internally provided with a first annular sealing ring (503) and a second annular sealing ring (508).

7. The pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1, wherein: the vertical distance from the lowest point of the lower end of the feeding pipeline to the highest point of the top end is equal to the material lifting height of the pneumatic conveying system.

8. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the material dirt separator (16) still includes and is used for installing air inlet (1602) with separator casing (1601) of gas outlet (1603), the top of separator casing (1601) is equipped with observation window subassembly (1604), the bottom of separator casing (1601) still is equipped with separator discharge gate (1607) and is used for fixing close square flange board (1608) at blast gate (17) top, be equipped with in gas outlet (1603) and give vent to anger pipeline (1606) and be used for adjusting height adjustment ring (1605) of giving vent to anger pipeline (1606) height.

9. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the air-lock valve (17) comprises an air-lock valve body, a driving motor (1702) and a transmission mechanism (1703), the top of the air-tight valve body is provided with an air-tight valve feeding port (1701) and an observation port (1708), the bottom is provided with an air-tight valve discharging port (1710), one side of the air-tight valve body is provided with a transmission mechanism (1703) and an annular transition plate (1704), the annular transition plate (1704) is located between the airlock valve body and the transmission mechanism (1703), one end of the transmission mechanism (1703) is connected with the driving motor (1702), the other end is provided with a rotor (1705) communicated to the inside of the air-closing valve body, a chain is arranged on the transmission mechanism (1703), the driving motor (1702) drives the rotor (1705) to rotate through the chain on the transmission mechanism (1703), the surface of the rotor (1705) is provided with blades (1706) distributed in an annular array.

10. The pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 9, wherein: the air-tight valve is characterized in that a shell right circular arc area (1707) and a shell left circular arc area (1709) are arranged in the air-tight valve body, and a gap between the blade (1706) and the shell right circular arc area (1707) and a gap between the blades and the shell left circular arc area (1709) are smaller than 1.5 mm.

11. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the starting end of the air pipe (24) is provided with an air pipe compensator (21), a pneumatic butterfly valve (22) and an air pressure detection device; pneumatic butterfly valve (22) with the valve signal receiving module electricity is connected, wind pressure detection device is wind pressure changer (23), wind pressure changer (23) with wind pressure signal receiving module electricity is connected.

12. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the top of the material-dust separator (16) is also provided with at least three first cleaning balls (15), and the first cleaning balls are distributed on the material-dust separator (16) in an annular array; the top of the storage bin (20) is also provided with at least three second cleaning balls (18), the storage bin (20) is distributed in an annular array, and the first cleaning balls (15) and the second cleaning balls (18) are electrically connected with a cleaning system control module.

13. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the cleaning pipeline comprises a first cleaning pipeline (43), a second cleaning pipeline (44) and a third cleaning pipeline (45), and the first cleaning pipeline (43) is connected with the starting end of the feeding pipeline; the second cleaning pipeline (44) is connected with a first cleaning ball (15) on the material-dust separator (16) and a second cleaning ball (18) on the storage bin (20) through a pipeline tee joint, and the third cleaning pipeline (45) is connected with the tail end of the feeding pipeline.

14. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the starting end and the tail end of the feeding pipeline are respectively provided with a cleaning water inlet (7) and a cleaning water outlet (12), the cleaning water inlet (7) comprises a first flange joint (701), a first porous anti-bayonet (702) is arranged in a connecting area of the first flange joint (701) and the starting end of the feeding pipeline, and a plurality of water inlet through holes are formed in the first porous anti-bayonet (702); the cleaning water outlet (12) comprises a second flange joint (1201), a second porous anti-bayonet (1202) is arranged in a connecting area of the second flange joint (1201) and the tail end of the feeding pipeline, and a plurality of water outlet through holes are formed in the second porous anti-bayonet (1202).

15. The pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 13, wherein: a first cleaning valve (31), a cleaning aeration valve (29) and a blowdown valve (30) are arranged on the first cleaning pipeline (43); a second cleaning valve (19) and a third cleaning valve (14) are arranged on the second cleaning pipeline (44); a fourth cleaning valve (36), a fifth cleaning valve (41) and a sixth cleaning valve (42) are arranged on the third cleaning pipeline (45); the first cleaning valve (31), the cleaning air supplement valve (29), the blowdown valve (30), the second cleaning valve (19), the third cleaning valve (14) and the fourth cleaning valve (36) are all electrically connected with the valve signal receiving module.

16. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the PLC control system further comprises a PLC communication module, and the PLC communication module is electrically connected with the PLC controller.

17. A pneumatic conveying system with automatic cleaning function for continuously conveying betel nuts as claimed in claim 1 or 3, characterized in that: the automatic feeding device is characterized by further comprising a first feeding ball valve (6) arranged at the starting end of the feeding pipeline and a second feeding ball valve (13) arranged at the tail end of the feeding pipeline, wherein the first feeding ball valve (6) and the second feeding ball valve (13) are electrically connected with the valve signal receiving module.