CN117485906A - Negative pressure conveying and weighing system and method - Google Patents

Negative pressure conveying and weighing system and method Download PDF

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Publication number
CN117485906A
CN117485906A CN202311458853.5A CN202311458853A CN117485906A CN 117485906 A CN117485906 A CN 117485906A CN 202311458853 A CN202311458853 A CN 202311458853A CN 117485906 A CN117485906 A CN 117485906A
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CN
China
Prior art keywords
weighing
conveying
negative pressure
storage bin
weighing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311458853.5A
Other languages
Chinese (zh)
Inventor
杨敏
李学奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Mesnac Intelligent Technology Co Ltd
Original Assignee
Zhejiang Mesnac Intelligent Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Mesnac Intelligent Technology Co Ltd filed Critical Zhejiang Mesnac Intelligent Technology Co Ltd
Priority to CN202311458853.5A priority Critical patent/CN117485906A/en
Publication of CN117485906A publication Critical patent/CN117485906A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B65G53/06—Gas pressure systems operating without fluidisation of the materials
    • B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
    • B65G53/14—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas the gas flow inducing feed of the materials by suction effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • 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
    • 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
    • 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
    • B65G53/36—Arrangements of containers
    • 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
    • B65G53/40—Feeding or discharging devices
    • B65G53/50—Pneumatic devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
    • G01G17/06—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes having means for controlling the supply or discharge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
    • G01G19/32—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them using two or more weighing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
    • G01G19/34—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them with electrical control means

Abstract

The invention discloses a negative pressure conveying and weighing system and a negative pressure conveying and weighing method, and relates to the technical field of conveying equipment. In order to improve work efficiency and reduce labor intensity of workers, the negative pressure conveying weighing system comprises a storage bin, a weighing device, a conveying device and a control device, wherein the weighing device and the conveying device are electrically connected with the control device, a fan is arranged on the weighing device, and the storage bin is connected with the weighing device through the conveying device capable of being switched on and off. The control device is used for controlling the conveying device to be communicated with the corresponding storage bin and the weighing device, and controlling the fan to be started, so that after materials in the storage bin enter the conveying device, the materials are conveyed under the action of negative pressure to be stored in the weighing device, and in the material conveying process, the weighing device is controlled to weigh. After the fan is started, the material is conveyed to the weighing device by means of negative pressure, the weighing device can weigh the material in the negative pressure conveying process, the degree of automation is high, the working efficiency can be improved, the labor intensity of workers is reduced, the system sealing performance is good, and the environmental pollution can be reduced.

Description

Negative pressure conveying and weighing system and method
Technical Field
The invention relates to the technical field of conveying equipment, in particular to a negative pressure conveying and weighing system and method.
Background
In the fields of food industry, fine chemical industry and the like, various powder materials are required to be weighed according to a certain formula proportion in production, and then are put into equipment such as a mixer and the like for further production. Taking the production of instant noodles as an example, various materials such as flour, starch and the like with different types are required to be used, the various materials are respectively weighed according to the weights of different components set by the process, and then all the weighed materials are put into a dough mixer for mixing. Because of the production capacity requirement, a plurality of dough mixing machines are required to be configured in the same workshop.
At present, a lot of enterprises still adopt a manually weighed batching mode: and (3) packaging one part of the materials into a whole package according to the incoming materials, and manually weighing the insufficient part. The materials counted in 15 kg-25 kg small bags and the materials weighed manually are all required to be manually put into the dough mixer 18 for mixing.
Whether the mode of all manual ingredients or the mode of part of manual ingredients, the labor intensity of workers is high, dust flies upward when the materials are manually weighed and the materials are input into a mixer, the working environment is bad, and the physical health of operators is adversely affected.
Therefore, how to improve the working efficiency and reduce the labor intensity of workers is a technical problem that needs to be solved by the technicians in the field at present.
Disclosure of Invention
Therefore, the invention aims to provide a negative pressure conveying and weighing system and a negative pressure conveying and weighing method, which can improve the working efficiency and reduce the labor intensity of staff.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the negative pressure conveying and weighing system comprises a storage bin, a weighing device, a conveying device and a control device, wherein the weighing device and the conveying device are electrically connected with the control device, a fan is arranged on the weighing device, and the storage bin is connected with the weighing device through the conveying device capable of being switched on and off; the control device is used for controlling the conveying device to be communicated with the corresponding storage bin and the weighing device, controlling the fan to be started, enabling materials in the storage bin to enter the conveying device, conveying the materials under the action of negative pressure to be stored in the weighing device, and controlling the weighing device to weigh in the material conveying process.
In some embodiments, a discharge port of the weighing device is provided with a receiving device, and the receiving device is electrically connected to the control device.
In some embodiments, the system further comprises a tank car, wherein the tank car can feed to a feed inlet of the storage bin after moving to a preset feeding position.
In some embodiments, a tank car aerodynamic source is provided on the tank car to cause the tank car to deliver material to the storage bin by pushing of gas.
In some embodiments, the cartridge is provided in plurality; the conveying device comprises a conveying pipeline and a valve assembly arranged on the conveying pipeline, and the valve assembly is electrically connected with the control device; the conveying pipeline is connected between the storage bins and the weighing devices, and the valve assembly can control the on-off between the weighing devices and each storage bin.
In some embodiments, the delivery line comprises a main pipe and a feed pipe, and the valve assembly comprises a feed three-way distribution valve provided on the main pipe; the weighing device is connected to one end of the main pipe, the feeding three-way distribution valve is arranged at the other end of the main pipe, and each storage bin is correspondingly connected to the feeding three-way distribution valve through the feeding pipe.
In some embodiments, the weighing device is provided in plurality; the valve assembly comprises a discharge three-way distribution valve arranged on the main pipe; the storage bin is connected to one end of the main pipe, the discharging three-way distribution valve is arranged at the other end of the main pipe, and each weighing device is correspondingly connected with the discharging three-way distribution valve through the discharging pipe.
The negative pressure conveying and weighing method is applied to the negative pressure conveying and weighing system; the method includes controlling the conveyor to communicate the selected bin with the selected weighing device; controlling the fan to start so that the selected materials in the storage bin enter the conveying device and then are conveyed under the action of negative pressure to be stored in the corresponding weighing device; and in the material conveying process, controlling the weighing device to weigh, and controlling the conveying device to be disconnected when the weighing value reaches the target value.
In some embodiments, after the control of the conveyor is turned off, the blower continues to be started until all of the material in the conveyor enters the weighing device.
In some embodiments, after the weight of the material stored by the weighing device reaches a set value, the method further comprises: controlling the weighing device to discharge materials to the corresponding receiving device until the weighing value of the weighing device is not greater than a preset discharging threshold value; wherein the set value is not smaller than the target value.
The invention provides a negative pressure conveying weighing system which comprises a storage bin, a weighing device, a conveying device and a control device, wherein the weighing device and the conveying device are electrically connected with the control device, a fan is arranged on the weighing device, and the storage bin is connected with the weighing device through the conveying device capable of being switched on and off. The control device is used for controlling the conveying device to be communicated with the corresponding storage bin and the weighing device, and controlling the fan to be started, so that after materials in the storage bin enter the conveying device, the materials are conveyed under the action of negative pressure to be stored in the weighing device, and in the material conveying process, the weighing device is controlled to weigh.
The invention has the beneficial effects that: after the fan is started, negative pressure can be formed in the system to convey materials to the weighing device, the weighing device can weigh the materials in the negative pressure conveying process, the degree of automation is high, the working efficiency can be improved, the labor intensity of workers is reduced, meanwhile, the system sealing performance in the material conveying process is good, and the environmental pollution can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a process flow diagram of a negative pressure conveying and weighing system according to an embodiment of the present invention.
Reference numerals:
the device comprises a storage bin 1, a feeder 2, a respirator 3, a feeding three-way distribution valve 4, a conveying pipeline 5, a feeding pipe 51, a main pipe 52, a discharging pipe 53, a first dust remover 6, a discharging three-way distribution valve 7, a weighing device 8, a second dust remover 9, a control valve 10, an online filter 11, a fan 12, a control device 13, a tank truck conveying pipeline 14, a hose 15, a quick pipe joint 16, a tank truck 17, a receiving device 18, an air outlet pipe 19 and a conveying device 20.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a negative pressure conveying weighing system and a negative pressure conveying weighing method, which can improve working efficiency and reduce labor intensity of workers.
Referring to fig. 1, the negative pressure conveying weighing system according to the present invention includes a bin 1, a weighing device 8, a conveying device 20 and a control device 13. The weighing device 8 and the conveying device 20 are electrically connected with the control device 13.
The storage bin 1 can be arranged as a bin body with larger volumeSpecifically, the particle size can be 30-200 m 3 Internal selected volume, e.g. volume 200m 3 The storage bin 1 has large volume, can store the production dosage for several days, and does not need frequent feeding. In one embodiment, the storage bin 1 is installed outside the factory building in the open air, for example, on a civil engineering platform or a steel platform, so that the space of the factory building is not occupied, the height of the factory building is not limited, the volume of the storage bin 1 can be large, and the construction cost of the factory building is low.
The weighing device 8 is provided with a temporary storage bin for storing materials, and specifically, the weighing device 8 is a negative pressure powder balance. The weighing device 8 is provided with a fan 12, and the fan 12 can be connected with the weighing device 8 through the second dust remover 9. The fan 12 is embodied as a Roots blower. The storage bin 1 is connected with the weighing device 8 through the conveying device 20 which can be switched on and off.
The control device 13 is used for controlling the conveying device 20 to be communicated with the corresponding storage bin 1 and the weighing device 8, and controlling the fan 12 to be started, so that after materials in the storage bin 1 enter the conveying device 20, the materials are conveyed under the action of negative pressure to be stored in the weighing device 8, and in the process of conveying the materials, the weighing device 8 is controlled to weigh. Wherein the material is specifically powder. Wherein the material stored in the silo 1 may fall by gravity to the conveyor 20.
In this embodiment, after the fan 12 is started, negative pressure can be formed in the system to convey materials to the weighing device 8, the weighing device 8 can finish weighing the materials in the negative pressure conveying process, the degree of automation is higher, the working efficiency can be improved, the labor intensity of workers is reduced, meanwhile, the system sealing performance in the material conveying process is better, and the environmental pollution can be reduced.
Further, a material receiving device 18 is arranged at a material outlet of the weighing device 8, and the material receiving device 18 is electrically connected with the control device 13. In this embodiment, the material receiving device 18 is a dough mixer, but in other embodiments, it may be a mixer, a blender, an extruder, an internal mixer, an open mill, a silo, or the like. After the material weighed in the weighing device 8 reaches the set value, the discharge port of the weighing device 8 can be opened, so that the material in the weighing device 8 can be discharged into the receiving device 18 for further operations such as mixing.
Further, the negative pressure conveying and weighing system further comprises a tank car 17, and the tank car 17 can feed to the feed inlet of the storage bin 1 after moving to a preset feeding position. In some embodiments, the feed inlet of the cartridge 1 is connected to one end of the tank car transfer line 14, the other end of the tank car transfer line 14 is connected to a hose 15, and the other end of the hose 15 is provided with a quick coupler 16. After the tank car 17 conveys the materials to the preset feeding position, a discharging pipeline of the tank car 17 is in butt joint with the quick pipe joint 16, and the tank car 17 can feed the materials to the storage bin 1 through the hose 15 and the tank car conveying pipeline 14, so that the materials in the tank car 17 are conveyed to the storage bin 1 for storage.
In the embodiment, the tank car 17 is used for conveying materials, the conveying speed is high, and only the pipeline butt joint between the tank car 17 and the warehouse 1 needs manual operation, so that the labor intensity is greatly reduced. Of course, in other embodiments, the tank 17 may be eliminated and the cartridge 1 replaced by a manual unpacking, feeding and conveying system.
Further, a tank car aerodynamic source is provided on the tank car 17 so that the tank car 17 delivers material to the storage bin 1 by pushing of gas. Specifically, a bin body air port is formed in the bin 1, and a first dust remover 6 can be arranged on the bin body air port of the bin 1. When the tank wagon aerodynamic source is started, air in the storage bin 1 can be discharged through a bin body air opening on the storage bin 1 and the first dust remover 6.
In this embodiment, the feeding position of the tank car 17 can be made more free by conveying the material with the aid of gas than by gravity blanking, without being higher than the silo 1.
Further, the conveying device 20 is connected with the storage bin 1 through the feeder 2, so that materials in the storage bin 1 are uniformly discharged into the conveying device 20, and the discharging speed is adjustable. Specifically, when the material is conveyed, the material in the bin 1 enters the conveying device 20 through the feeder 2, and enters the weighing device 8 in a negative pressure conveying mode.
Wherein, the discharge gate department of warehouse 1 below sets up feeder 2, and the quantity of feeder 2 can be set up according to productivity and production beat's demand, and for example warehouse 1 and feeder 2 quantity are equal and the one-to-one is connected, and perhaps, a plurality of feeders 2 can be connected to a warehouse 1. In the present embodiment, the feeder 2 is a rotary feeder, and in other embodiments, may be another feeder such as a screw feeder or a disk feeder.
Further, a plurality of bins 1, for example, three bins 1, may be provided, and may be selected according to the number of the recipe expansion. The delivery device 20 comprises a delivery line 5 and a valve assembly provided on the delivery line 5, the valve assembly being electrically connected to the control device 13. The conveying pipeline 5 is connected between the storage bins 1 and the weighing devices 8, and the valve assembly can control the on-off between the weighing devices 8 and each storage bin 1.
Due to the arrangement of the plurality of storage bins 1, different materials can be stored respectively, and each storage bin 1 can sequentially convey the materials to the weighing device 8 for weighing respectively, so that the production efficiency can be further improved. Of course, in other embodiments, only one bin 1 may be provided, and the weighing device 8 may be used for weighing one material, and when multiple materials are involved, the weighing may be accomplished by replacing the material type in the bin 1 or manually assisting the weighing.
Further, the delivery line 5 comprises a main pipe 52 and a feed pipe 51, and the valve assembly comprises a feed three-way distribution valve 4 provided on the main pipe 52. The weighing device 8 is connected to one end of the main pipe 52, the feeding three-way distribution valve 4 is arranged at the other end of the main pipe 52, and each storage bin 1 is correspondingly connected to the feeding three-way distribution valve 4 through the feeding pipe 51, so that the on-off conditions of different storage bins 1 and the weighing device 8 can be controlled by controlling the on-off conditions of the feeding three-way distribution valve 4, and the number of valves can be reduced. Specifically, after each of the three-way feed distribution valves 4 is connected to the main pipe 52, the number of available ports remaining in all of the three-way feed distribution valves 4 is not smaller than the number of cartridges 1 to be connected, and each of the cartridges 1 is connected to a port of a different one of the three-way feed distribution valves 4. Of course, in other embodiments, the feeding three-way distribution valve 4 may be omitted, each feeding pipe 51 is provided with a feeding valve capable of controlling on-off of the feeding valve, and two ends of each feeding pipe 51 are connected with the main pipe 52 and the storage bin 1 respectively.
Further, the weighing device 8 is provided in plurality. The delivery line 5 further comprises a discharge pipe 53 and the valve assembly comprises a discharge three-way dispensing valve 7 provided on the main pipe 52. The storage bin 1 is connected to one end of the main pipe 52, the other end of the main pipe 52 is provided with a discharge three-way distribution valve 7, and each weighing device 8 is correspondingly connected with the discharge three-way distribution valve 7 through a discharge pipe 53. Specifically, after each discharge three-way distribution valve 7 is connected to the main pipe 52, the number of available ports remaining in all the discharge three-way distribution valves 7 is not smaller than the number of weighing devices 8 to be connected, and each weighing device 8 is connected to a port of a different discharge three-way distribution valve 7. In addition, the material receiving device 18 and the weighing device 8, and various pipelines may be provided in number according to the demands of productivity and tact, for example, three material receiving devices 18 and weighing devices 8 are provided.
In this embodiment, since a plurality of weighing devices 8 are provided, the material can be fed at multiple points, and the storage bin 1 can sequentially convey the materials to different weighing devices 8 for weighing respectively, so that the production efficiency can be further improved. In addition, each bin 1 can be subjected to on-off control and communication through the conveying device 20 and can be used for blanking to any weighing device 8, the bin 1 and the weighing device 8 do not need to be subjected to one-to-one corresponding blanking weighing, and the flexibility of equipment use can be improved.
Further, each weighing device 8 is connected to the same fan 12 through an air outlet pipe 19, and each air outlet pipe 19 is provided with a control valve 10 for controlling on-off of the air outlet pipe, and the control valves 10 are electrically connected to the control device 13, so that the arrangement of the fan 12 can be reduced. In some embodiments, the control valve 10 is a butterfly valve. In other embodiments, the weighing devices 8 may be disposed in a one-to-one correspondence with the fans 12.
The negative pressure conveying and weighing system in the embodiment comprises the following process steps:
1. the tank car 17 conveys materials to the vicinity of the storage bin 1, the corresponding storage bin 1 and the tank car conveying pipeline 14 thereof are selected according to the types of the materials conveyed by the tank car 17 and are in butt joint through the quick pipe joint 16, the tank car aerodynamic source is started, the materials are conveyed to the storage bin 1, and air in the storage bin 1 is discharged through the first dust remover 6.
2. The control device 13 obtains the material calling requirement of the material receiving device 18, gives an instruction, the system starts a material mixing flow, the system performs material mixing according to the formula requirement, the fan 12 is started, the weighing device 8 corresponding to the material receiving device 18 corresponding to the material calling requirement and the control valve 10 above the second dust collector 9 are opened, the discharging three-way distribution valve 7 is switched to the conveying direction of the weighing device 8, the feeding three-way distribution valve 4 is switched to the corresponding storage bin 1 direction, and a negative pressure passage is established between the weighing device 8 and the storage bin 1 and the feeder 2 below the weighing device 8.
3. The materials in the corresponding storage bins 1 are fed through the feeders 2, the materials enter the conveying pipelines 5 and are conveyed into the weighing devices 8 under the action of negative pressure, in the conveying process, the weighing devices 8 measure the weight of the materials, when the weight is close to a formula set amount, the speed of the feeders 2 is reduced, when the weight reaches a pre-closing value set by the control device 13, the feeders 2 are stopped, no more materials enter the conveying pipelines 5, the fans 12 continue to work until all the materials in the conveying pipelines 5 enter the weighing devices 8, and the weighing of the materials is completed; and repeating the process, sequentially completing weighing all materials in the formula, and ending the negative pressure conveying and weighing process.
4. After the material receiving device 18 is ready and has the material feeding condition, the control device 13 controls the valve 10 to be opened and starts the discharging program, the discharging is finished through judging the weight of the weighing device 8, and the system completes the whole process of negative pressure conveying weighing and material feeding of a batch of materials.
5. The control device 13 sequentially prepares materials for each material receiving device 18 according to the material calling requirements and the material calling sequence of the material receiving devices 18.
According to the negative pressure conveying weighing system in the embodiment, the negative pressure conveying and weighing process steps can be automatically controlled by the system under the control of the control device 13 through the control logic set by the program of the control device, weighing data and actual feeding data of each batch of formulas are stored in the control device 13, the product quality is traceable, and the weighing and conveying information is traceable, so that the weighing precision of the system is ensured, and the stability of the product quality is ensured; the negative pressure conveying and the weighing process steps are completed in a relatively airtight state, so that the system effectively controls dust leakage, and the working environment is protected from cleaning; the system can complete automatic weighing of the multi-component materials and can be expanded, is suitable for production conditions of large formula consumption and more material types, and overcomes the limitations of the prior products; the system can be added with the process steps of sieving, deironing and the like according to the process requirements.
Besides the negative pressure conveying and weighing system, the invention also provides a negative pressure conveying and weighing method, which comprises the negative pressure conveying and weighing system, and the negative pressure conveying and weighing system can be specifically provided in any embodiment, and the beneficial effects of the negative pressure conveying and weighing system provided in the embodiment can be correspondingly referred to the embodiments. Wherein the steps in the negative pressure delivery weighing method can be performed by the control device 13 in the negative pressure delivery weighing system.
The negative pressure conveying and weighing method comprises the following steps:
s1: the control conveyor 20 communicates with the selected bin 1 and the selected weighing device 8.
Wherein, the storage bins 1 are provided with a plurality of storage bins 1 for respectively storing different materials, and the selected weighing device 8 can be communicated with the storage bins 1 corresponding to the selected materials according to the material calling requirement of the material receiving device 18. Wherein, the material demand can include the material type and weight. In addition, the weighing devices 8 are provided in plurality and are respectively arranged corresponding to the receiving devices 18, when the control device 13 receives the material calling requirement of one receiving device 18, the corresponding weighing device 8 is started, specifically, after the storage bin 1 and the weighing device 8 are selected, the control device 13 controls the corresponding feeding three-way distribution valve 4 and the discharging three-way distribution valve 7 so that the selected storage bin 1 is communicated with the selected weighing device 8, and other storage bins 1 and other weighing devices 8 are cut off through the conveying device 20.
The material calling requirement can be a formula of mixed different materials, in which case, different bins 1 can be sequentially communicated with the selected weighing devices 8 according to a preset sequence, and the corresponding set amount of materials can be conveyed to the weighing devices 8.
S2: the blower 12 is controlled to be started so that after the materials in the selected storage bin 1 enter the conveying device 20, the materials are conveyed under the action of negative pressure to be stored in the corresponding weighing device 8.
Wherein during the material transport, the weighing device 8 is controlled to weigh and the transport device 20 is controlled to be disconnected when the weighing value reaches the target value G1. That is, the weighing device 8 can weigh the materials in the negative pressure conveying process, so that the production efficiency can be improved.
Further, after the conveyor 20 is controlled to be disconnected, the fan 12 is continuously started until all materials in the conveyor 20 enter the weighing device 8.
Wherein, the end of the conveying device 20 connected with the storage bin 1 can be provided with a conveying air opening so as to be matched with the fan 12 to enable the material to flow smoothly. In addition, the delivery tuyere may be provided with a respirator 3.
The volume of the material that can be temporarily stored by the conveyor 20 between the different bins 1 and the weighing devices 8 is constant due to the certainty of the volume of the conveyor 20, so that the weight of the material is also constant, and the weight of the material may be G2, which may be pre-stored in the control device 13.
In some embodiments, in the demand for material, the set amount g0=target value g1+the temporarily stored material weight G2 of the conveying device 20 is the required material weight. More specifically, when the weight weighed by the weighing device 8 approaches the target value G1, the corresponding feeder 2 can be controlled to slow down, when the weight weighed by the weighing device 8 approaches the target value G1, the feeder 2 is controlled to stop feeding, the material does not enter the conveying device 20 through the storage bin 1 any more, the fan 12 continues to operate until the material in the conveying device 20 completely enters the weighing device 8, and the weighing device 8 weighs the set amount G0.
In this embodiment, after the conveying device 20 disconnects the bin 1 from the weighing device 8, the blower 12 is continuously started, so that the material temporarily stored in the conveying device 20 can be continuously conveyed to the weighing device 8, and the waste of the material can be reduced. Of course, in other embodiments, the set amount g0=target value G1 in the demand for the material, and the temporarily stored material in the conveying device 20 can be cleaned before the next conveying to the weighing device 8.
Further, after the weight of the material stored in the weighing device 8 reaches the set value, the method further comprises:
s3: the weighing device 8 is controlled to discharge materials to the corresponding material receiving device 18 until the weighing value of the weighing device 8 is not greater than a preset discharging threshold value.
Wherein the set value is not less than the target value, and the preset unloading threshold is 0 or an error value close to 0.
After the material receiving device 18 is ready and has the material feeding condition, the control device 13 controls the material outlet of the weighing device 8 to be opened and starts the material discharging program. In the process of unloading the material to the material receiving device 18, the weighing device 8 checks the weight of the buffered material in the weighing device 8, and when the weight reaches a preset unloading threshold, for example, the unloading process is finished within a zero or allowable error range, the weight precision of the material actually put into the material receiving device 18 can be ensured, and the error caused by the material remaining in the weighing device 8 is avoided.
The negative pressure conveying weighing system and method of the invention realize the function of simultaneously completing weighing in the process of negative pressure conveying of materials, ensure the precision of weighing and conveying, meet the requirement of a production process on the precision, control dust leakage in the process, and greatly reduce equipment investment cost, maintenance cost and energy consumption; the automatic material proportioning and process system capable of simplifying the flow and reducing the equipment and factory input cost can be realized, meanwhile, the high weighing precision and the high feeding precision of the materials are ensured, the precision requirement of the production process can be met, the problem that the labor intensity of workers is high in the production process of some food industries and fine chemical products at present can be solved, the problem that the dust flying working environment is severe in the production process is solved, the problem that the product quality is not traceable is solved, and the problems that the gravity blanking weighing system can only weigh one to one, the high standby input cost is required and the high factory height is required are solved.
It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.
The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The negative pressure conveying and weighing system and the method provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. The negative pressure conveying weighing system is characterized by comprising a storage bin (1), a weighing device (8), a conveying device (20) and a control device (13), wherein the weighing device (8) and the conveying device (20) are electrically connected with the control device (13), a fan (12) is arranged on the weighing device (8), and the storage bin (1) is connected with the weighing device (8) through the conveying device (20) which can be switched on and off;
the control device (13) is used for controlling the conveying device (20) to be communicated with the corresponding storage bin (1) and the weighing device (8), and controlling the fan (12) to be started, so that after materials in the storage bin (1) enter the conveying device (20), the materials are conveyed under the action of negative pressure to be stored in the weighing device (8), and in the material conveying process, the weighing device (8) is controlled to weigh.
2. Negative pressure conveying weighing system according to claim 1, characterized in that the discharge opening of the weighing device (8) is provided with a receiving device (18), which receiving device (18) is electrically connected to the control device (13).
3. Negative pressure delivery weighing system according to claim 1, further comprising a tank car (17), said tank car (17) being adapted to feed the feed opening of the bin (1) after movement to a preset feeding position.
4. A negative pressure delivery weighing system according to claim 3, characterized in that a tank car aerodynamic source is provided on the tank car (17) so that the tank car (17) delivers material to the storage bin (1) by means of the pushing of gas.
5. Negative pressure delivery weighing system according to any of claims 1 to 4, characterized in that the storage bin (1) is provided in plurality; the conveying device (20) comprises a conveying pipeline (5) and a valve assembly arranged on the conveying pipeline (5), and the valve assembly is electrically connected with the control device (13); the conveying pipeline (5) is connected between the storage bins (1) and the weighing devices (8), and the valve assembly can control the on-off between the weighing devices (8) and each storage bin (1).
6. Negative pressure delivery weighing system according to claim 5, characterized in that said delivery line (5) comprises a main pipe (52) and a feed pipe (51), said valve assembly comprising a feed three-way distribution valve (4) provided on said main pipe (52); the weighing device (8) is connected to one end of the main pipe (52), the feeding three-way distribution valve (4) is arranged at the other end of the main pipe (52), and each storage bin (1) is correspondingly connected to the feeding three-way distribution valve (4) through the feeding pipe (51).
7. Negative pressure delivery weighing system according to claim 5, characterized in that the weighing means (8) are provided in plurality; the conveying pipeline (5) comprises a main pipe (52) and a discharging pipe (53), and the valve assembly comprises a discharging three-way distribution valve (7) arranged on the main pipe (52); the storage bin (1) is connected to one end of the main pipe (52), the discharging three-way distribution valve (7) is arranged at the other end of the main pipe (52), and each weighing device (8) is correspondingly connected with the discharging three-way distribution valve (7) through the discharging pipe (53).
8. A negative pressure conveying weighing method, characterized by being applied to the negative pressure conveying weighing system of any one of claims 1 to 7;
the method comprises the following steps:
-controlling said conveying means (20) to communicate selected said bins (1) with selected said weighing means (8);
controlling the fan (12) to start so that after the selected materials in the storage bin (1) enter the conveying device (20), the materials are conveyed under the action of negative pressure to be stored in the corresponding weighing device (8);
wherein, during the material conveying process, the weighing device (8) is controlled to weigh, and the conveying device (20) is controlled to be disconnected when the weighing value reaches the target value.
9. The negative pressure conveying and weighing method according to claim 8, characterized in that after the conveying device (20) is controlled to be disconnected, the fan (12) is continuously started until all materials in the conveying device (20) enter the weighing device (8).
10. The negative pressure conveying weighing method according to claim 8, characterized in that after the weight of the material stored by the weighing device (8) reaches a set value, it further comprises:
controlling the weighing device (8) to discharge materials to the corresponding receiving device (18) until the weighing value of the weighing device (8) is not greater than a preset discharging threshold value;
wherein the set value is not smaller than the target value.
CN202311458853.5A 2023-11-03 2023-11-03 Negative pressure conveying and weighing system and method Pending CN117485906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311458853.5A CN117485906A (en) 2023-11-03 2023-11-03 Negative pressure conveying and weighing system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311458853.5A CN117485906A (en) 2023-11-03 2023-11-03 Negative pressure conveying and weighing system and method

Publications (1)

Publication Number Publication Date
CN117485906A true CN117485906A (en) 2024-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311458853.5A Pending CN117485906A (en) 2023-11-03 2023-11-03 Negative pressure conveying and weighing system and method

Country Status (1)

Country Link
CN (1) CN117485906A (en)

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