High-precision automatic batching and conveying system and method applied to slurry preparation

Abstract

The invention relates to a high-precision automatic batching and conveying system and method applied to slurry preparation, a first rechecking bin is arranged below each main material bin to recheck the weight of materials put into the main material bins so as to ensure that the weight of the materials put into the main material bins meets the design requirements, and meanwhile, a second rechecking bin is arranged below an auxiliary material bin so as to ensure that the weight of the materials put into the main material bins meets the design requirements. The weight of the materials placed in the auxiliary material bin is rechecked, it is ensured that the weight of the materials placed in the auxiliary material bin meets the design requirement, and through the rechecking process, the technical problem that due to errors, failures and other faults of weighing sensors on the main material bin and the auxiliary material bin, the weight of the placed materials is not accurate, and consequently the material blending proportion does not meet the design requirement is effectively solved; and the batching precision of the automatic pulping system is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of material conveying, and in particular relates to a high-precision automatic batching and conveying system used for slurry preparation. Background Art

[0002] Slurry is a raw material in the yarn sizing process, which is used to increase yarn strength, reduce hairiness and improve yarn quality. Slurry is obtained from a variety of materials through steps such as blending, mixing and cooking. In the blending process, manual blending is usually used. This method has technical problems such as high labor intensity, high dust, large weight errors of various material combinations and low blending efficiency. Therefore, in recent years, several automatic batching systems have appeared on the market to replace manual batching pulping in order to obtain higher blending accuracy and pulping efficiency.

[0003] At present, the common automatic batching and conveying system installs a weighing sensor on each material bin to detect the weight of the material in the bin, hoping to achieve high-precision batching. However, in actual applications, it is found that due to errors, failures and other difficult-to-detect faults of the weighing sensor, the configured slurry composition does not match the design. When the user discovers the problem, the slurry has often been configured and even applied to the sizing process, which will cause the company to suffer great losses. Moreover, this loss is unpredictable, bringing great uncertainty to the company's production.

[0004] Therefore, it is necessary to provide a high-precision automatic batching and conveying system and method to solve the above technical problems. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a high-precision automatic batching and conveying system for slurry preparation to solve the technical problem that the material mixing ratio does not meet the design requirements due to errors, failures and other faults of the material bin weighing sensor.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-precision automatic batching and conveying system for slurry preparation, including multiple main material bins and multiple auxiliary material bins, at least one slurry mixing and stirring modulation barrel, each main material bin and auxiliary material bin is connected to the feed port of the slurry mixing and stirring modulation barrel, the discharge port of the slurry mixing and stirring modulation barrel is used to connect the feed port of the high-pressure cooking barrel, the lower ends of the multiple main material bins are respectively gathered to the first re-check bin through screw conveyors, the lower ends of the multiple auxiliary material bins are respectively gathered to the second re-check bin through screw conveyors, and the lower ends of the first re-check bin and the second re-check bin are respectively gathered to the second re-check bin. The ends are respectively connected with the negative pressure feeding pipe through the second valve and the soft connection structure, the downstream end of the negative pressure feeding pipe is connected with the feeding port of the slurry mixing and stirring barrel through a vacuum feeder, and the discharge end of each screw conveyor is provided with a first valve, and each main material bin and auxiliary material bin, the first review bin and the second review bin are respectively provided with a weighing sensor, and each weighing sensor is respectively connected with a controller, and the controller is electrically connected with each screw conveyor, the first valve, the second valve and the vacuum feeder to control the action of each screw conveyor, the first valve, the second valve and the vacuum feeder.

[0007] As a preferred solution, each slurry mixing and stirring barrel is respectively provided with a weighing sensor, and the weighing sensor is also connected to the controller.

[0008] As a preferred solution, the discharge port of each slurry mixing, stirring and modulation barrel is located above the feed port of the high-pressure cooking barrel.

[0009] As a preferred solution, a plurality of legs are discretely distributed circumferentially on the middle outer walls of the main material bin and the auxiliary material bin, and a weighing sensor is arranged under each leg; a plurality of support frames are discretely distributed circumferentially on the middle outer walls of the first review bin and the second review bin, and a weighing sensor is arranged under each support frame, and each weighing sensor is electrically connected to the controller.

[0010] As a preferred solution, the slurry mixing and stirring modulation barrel is also connected to a plurality of liquid slurry storage tanks through a metering pump, the metering pumps correspond to the liquid slurry storage tanks one by one, and the slurry in the liquid slurry storage tanks is pumped into the slurry mixing and stirring modulation barrel through the metering pump; a metering water injection pipe is also connected to the top of the slurry mixing and stirring modulation barrel, and a flow valve is provided on the metering water injection pipe, and the metering pump and the flow valve are respectively electrically connected to the controller and controlled by the controller.

[0011] As a preferred solution, an arch breaking device is provided between the discharge port of each main material bin and auxiliary material bin and the screw conveyor, and an arch breaking device is provided between the discharge port of the first recheck bin and the second recheck bin and the second valve.

[0012] As a preferred solution, a large number of air replenishment holes extending obliquely downward are evenly distributed circumferentially on the top side walls of the first and second recheck bins, and filter cloths covering all the air replenishment holes are sleeved on the outer walls of the first and second recheck bins.

[0013] The present invention further aims to solve the technical problem of providing a high-precision automatic batching and conveying method to solve the technical problem that the material mixing ratio does not meet the design requirements due to errors, failures and other faults of the weighing sensor during the material warehouse conveying process.

[0014] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-precision automatic batching and conveying method, using the above high-precision automatic batching and conveying system to perform the following specific steps: a. Use each weighing sensor to detect the weight of each main material bin, auxiliary material bin, first recheck bin, and second recheck bin in empty state and store or calibrate to zero; b. Replenish materials to each main material bin and each auxiliary material bin, and then use the weighing sensors of each main material bin and each auxiliary material bin to detect the weight of the storage material status of each main material bin and each auxiliary material bin and calculate the material weight; c. The controller controls the screw conveyor at the lower end of the main material bin or auxiliary material bin storing various materials to rotate and feed the materials according to the weight of the materials input by the operator, and continuously detects the weight change of the materials in each main material bin and each auxiliary material bin in the feeding state. When the weight change of any material is equal to the weight required for the compatibility, the controller closes the screw conveyor conveying the material and the first discharge valve, and each screw conveyor conveys the material to the corresponding first review bin or second composite bin; d. The weighing sensors on the first and second recheck bins continuously detect the weight of the materials in the bins and feed back to the controller. The difference Mm between the increase in the weight m of the materials in the first recheck bin and the sum of the decreases in the weight of the materials in each main bin should be within a preset accuracy range. When it exceeds this range, the controller will alarm and suspend the running screw conveyor. The difference M'-m' between the increase in the weight m' of the materials in the second recheck bin and the sum of the decreases in the weight of the materials in each auxiliary bin should be within a preset range. When it exceeds this range, the controller will alarm and suspend the running screw conveyor. e. After the feeding of each main material bin and auxiliary material bin is completed and the first and second recheck bins confirm that the weight of the materials therein is correct, a predetermined amount of water is added to the slurry mixing, stirring and modulating barrel according to the process requirements, and the slurry mixing, stirring and modulating barrel is started for stirring; the controller starts the vacuum feeder and the dosing pump, and controls the second valve at the bottom of the first and second recheck bins to open according to the process sequence, and the materials in the first and second recheck bins fall into the negative pressure feeding pipe in sequence and are sucked into the slurry mixing, stirring and modulating barrel by negative pressure; at the same time, the weighing sensors on the first and second recheck bins continue to detect the weight of the materials in the bins until the detection data remains unchanged, and calculate whether the remaining materials in the bins meet the requirements of the matching error. If the remaining materials in the bins exceed the error range of the material matching weight, the controller alarms and maintains the working state of the vacuum feeder until the operator eliminates the fault and reduces the error to a reasonable range, and the controller delays for a certain period of time and then shuts down the vacuum feeder; the dosing pump pumps the liquid slurry into the slurry mixing, stirring and modulating barrel according to the process sequence.

[0015] f. During the stirring process, add the total amount of water according to the process requirements, and complete the stirring until it is evenly stirred.

[0016] g. Check whether the total amount of material in the slurry mixing and stirring barrel is consistent with the sum of the weight of various raw materials and water. If not, an alarm will be issued for manual review; if consistent, the prepared slurry will be injected into the high-pressure cooking barrel for high-pressure cooking.

[0017] As a preferred solution, when implementing the above step c, the main material bins storing the required compound materials are fed in sequence, and the auxiliary material bins storing the required compound materials are also fed in sequence.

[0018] As a preferred solution, the controller is connected to warning lights corresponding to each main material bin and each auxiliary material bin, and is also connected to an alarm. When the controller detects that the difference between the feed amount of a certain material and the increase in the first review bin or the second review bin exceeds a reasonable range, an alarm is sounded and the warning lights corresponding to the main material bin or the auxiliary material bin storing the material are turned on, prompting employees to troubleshoot the problem.

[0019] The beneficial effects of the present invention are as follows: the high-precision automatic batching and conveying system of the present invention arranges a first review bin under each main material bin to review the weight of the material discharged from the main material bin, thereby ensuring that the weight of the material discharged from the main material bin meets the design requirements; and also arranges a second review bin under the auxiliary material bin to review the weight of the material discharged from the auxiliary material bin, thereby ensuring that the weight of the material discharged from the auxiliary material bin meets the design requirements. Through the review process, the technical problem of inaccurate weight of discharged materials resulting from errors and failures of weighing sensors on the main material bin and the auxiliary material bin and residues in the material conveying process, which results in the material mixing ratio not meeting the design requirements, is effectively overcome, thereby effectively improving the batching accuracy of the automatic pulping system.

[0020] The present invention further provides weighing sensors on each slurry mixing and stirring barrel to verify the amount of liquid slurry pumped, the amount of water added, and the residual amount of material during negative pressure conveying, thereby ensuring that the ratio accuracy of the modulated slurry material meets the design requirements.

[0021] The present invention further achieves complete discharge of the slurry into the high-pressure boiling barrel by arranging the discharge port of each slurry mixing and stirring barrel above the feed port of the high-pressure boiling barrel, thereby avoiding the technical problem of material residue in the conveying pipeline.

[0022] The present invention further adopts a negative pressure pipe to convey materials to suck materials from a low place into a slurry mixing and stirring modulation barrel at a high place for mixing, which not only eliminates the diffusion of material dust into the air to affect air quality, reduces material loss, and improves the accuracy of material ratio, but also enables the slurry mixing and stirring modulation barrel and the high-pressure pulping barrel to be arranged on the sides of each material bin and the review bin, effectively reducing the overall height of the automatic batching and pulping system and reducing the user's production cost.

[0023] The present invention further connects each main material bin with the first review bin, each auxiliary material bin with the second review bin, and the first review bin with the negative pressure material conveying pipe, and the second review bin with the negative pressure material conveying pipe through a soft connection structure, thereby ensuring the accuracy of the materials detected by the weighing sensors of each main material bin, auxiliary material bin, and the first review bin and the second review bin, and ensuring the batching accuracy of the automatic batching and pulping system.

[0024] The soft connection structure adopted in the present invention utilizes an upper material guide pipe and a lower material guide pipe with mutual clearance to ensure that the material accurately falls into the negative pressure material conveying pipe without accumulating on the inner wall of the flexible telescopic tube. The flexible telescopic tube can achieve sealing to prevent external air from directly entering the negative pressure material conveying pipe without being filtered and affecting the slurry quality.

[0025] The present invention utilizes a quantitative pump and a flow valve to accurately control the addition amount of liquid slurry and water, thereby effectively ensuring the batching accuracy of the automatic batching slurry making system.

[0026] The present invention arranges arch-breaking devices at the discharge ports of each main material bin, auxiliary material bin, first re-check bin and second re-check bin to break the arches of materials in each main material bin, auxiliary material bin, first re-check bin and second re-check bin to avoid material agglomeration and inability to normally lower and feed the materials. The arch-breaking device adopted by the present invention utilizes airflow to break the arches of materials, which will not affect the measurement accuracy of the weighing sensor, and can therefore effectively ensure the batching accuracy of the automatic batching and pulping system.

[0027] The present invention further arranges air supply holes on the upper parts of the first and second review bins to realize the formation of a top-down cleaning airflow in the first and second review bins, thereby cleaning the materials on the inner walls of the first and second review bins, reducing the amount of residual materials in the first and second review bins, and further improving the batching accuracy of the automatic batching pulping system.

[0028] The high-precision automatic batching and conveying method of the present invention uses the first review bin to review the weight of the material released from the main bin during the material conveying process to ensure that the weight of the material released from the main bin meets the design requirements, and uses the second review bin to review the weight of the material released from the auxiliary bin to ensure that the weight of the material released from the auxiliary bin meets the design requirements. Through the review process, the technical problem that the material mixing ratio does not meet the design requirements due to the inaccurate weight of the released material caused by the error, failure and other faults of the weighing sensors on the main bin and the auxiliary bin is effectively overcome, and the batching accuracy of the automatic pulping system is effectively improved. At the same time, the weighing sensor set on the slurry mixing and stirring barrel is used to review the amount of liquid slurry pumped, the amount of water added, and the residual amount of material during the negative pressure conveying process, so as to ensure that the accuracy of the modulated slurry material ratio meets the design requirements.

[0029] The present invention further reviews the detection accuracy of the weighing sensors of each main material bin and auxiliary material bin by having the main material bin discharge materials downward in sequence and the auxiliary material bin discharge materials downward in sequence, thereby realizing the function of online calibration of each weighing sensor, greatly reducing the equipment downtime for maintenance and improving production efficiency.

[0030] The present invention further guides the user to narrow the scope of troubleshooting and improve the efficiency of troubleshooting by providing warning lights corresponding to each main material bin and auxiliary material bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of the high-precision automatic batching and conveying system of the present invention; Figure 2 It is a schematic diagram of the connection structure between the soft connection structure and the screw conveyor, the first review bin or the second review bin; Figure 3 It is a schematic diagram of the connection structure between the soft connection structure, the second valve, and the negative pressure feed pipe; Figure 4 It is a schematic diagram of the assembly structure of the first review warehouse; Figure 5 It is a schematic diagram of the half-section structure of the arch breaking device; Figure 1~Figure 5In: 1. Main material bin, 2. Auxiliary material bin, 3. Slurry mixing and stirring barrel, 4. High-pressure slurry boiling barrel, 5. Screw conveyor, 6. First review bin, 7. Second review bin, 8. Second valve, 9. Soft connection structure, 9a. Upper material guide pipe, 9b. Lower material guide pipe, 9c. Flexible telescopic pipe, 9d. Upper flange, 9e. Lower flange, 10. Negative pressure feed pipe, 11. Vacuum feeder, 12. Weighing sensor, 13. Controller, 14. Legs, 15. Support frame, 16. Dosing pump, 17. Liquid slurry storage tank, 18. Quantitative water injection pipe, 19. Flow valve, 20. Arch breaking device, 20a. Inner cylinder, 20b. Outer cylinder, 20c. Annular sealing plate, 20d. Annular air cavity, 20e. Annular piston, 20f. Annular magnet, 20g. Electromagnet, 20h. Exhaust hole, 20i. Detection hole, 20j. Air pressure sensor, 20k. One-way air nozzle, 21. Air compressor, 22. Air supply hole, 23. Filter cloth, 24. Air filter, 25. First valve. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1~Figure 5 The high-precision automatic batching and conveying system for slurry preparation shown in the figure includes two main material bins 1 and six auxiliary material bins 2 ( Figure 1 Only two auxiliary material bins 2 are shown as examples, a slurry mixing and stirring barrel 3, and a high-pressure pulp cooking barrel 4. The lower ends of the two main material bins 1 are respectively gathered to the first recheck bin 6 through the screw conveyor 5, and the lower ends of the six auxiliary material bins 2 are respectively gathered to the second recheck bin 7 through the screw conveyor 5. The lower ends of the first recheck bin 6 and the second recheck bin 7 are respectively connected to the negative pressure feeding pipe 10 through the second valve 8 and the soft connection structure 9. The downstream end of the negative pressure feeding pipe 10 is connected to the feeding port of the slurry mixing and stirring barrel 3 through a vacuum feeder 11. The upstream end of the negative pressure feeding pipe 10 can preferably be connected to an air filter. The filter 24 is used to improve the cleanliness of the material. The discharge port of the slurry mixing and stirring barrel 3 is connected to the feed port of the high-pressure cooking barrel 4. The discharge end of each screw conveyor 5 is provided with a first valve 25. Each main material bin 1 and auxiliary material bin 2, the first review bin 6, and the second review bin 7 are respectively provided with a weighing sensor 12. Each weighing sensor 12 is electrically connected to a controller 13. The controller 13 is electrically connected to each screw conveyor 5, the first valve 25, the second valve 8 and the vacuum feeder 11 to control the action of each screw conveyor 5, the first valve 25, the second valve 8 and the vacuum feeder 11.

[0034] In practical applications, the number of the main material bin 1, the auxiliary material bin 2, the slurry mixing and stirring barrel 3 and the high-pressure slurry cooking barrel 4 can be increased or decreased according to the type of main material, auxiliary material and process requirements.

[0035] As an improvement to the present embodiment, a weighing sensor 12 is also provided on the slurry mixing and stirring barrel 3 , and the weighing sensor 12 is also electrically connected to the controller 13 .

[0036] As another improvement to this embodiment, the discharge port of each slurry mixing, stirring and modulation barrel 3 is located above the feed port of the high-pressure cooking barrel 4.

[0037] As a further improvement to this embodiment, the discharge end of each screw conveyor 5 is connected to the first review bin 6 or the second review bin 7 by a soft connection structure 9, and the soft connection structure 9 includes a coaxially arranged upper guide pipe 9a, a lower guide pipe 9b, a flexible telescopic pipe 9c, an upper flange 9d and a lower flange 9e, wherein the upper guide pipe 9a is clearance-fitted in the lower guide pipe 9b, and the flexible telescopic pipe 9c is sleeved on the outer sides of the upper guide pipe 9a and the lower guide pipe 9b, and the upper end of the upper guide pipe 9a and the upper end of the flexible telescopic pipe 9c are respectively The lower ends of the lower guide pipe 9b and the flexible telescopic tube 9c are respectively fixedly and sealedly connected to the lower flange 9d, the outlet end of each screw conveyor 5 is sealedly connected to the upper flange 9d of each soft connection structure 9, the feed port of the first review bin 6 or the second review bin 7 is sealedly connected to the lower flange 9e of each soft connection structure 9, the discharge port of each second valve 8 is sealedly connected to the upper flange 9d of the soft connection structure 9, and the negative pressure feed pipe 10 is sealedly connected to the lower flange 9e of the soft connection structure 9.

[0038] The specific connection structure of the weighing sensor 12 described in this embodiment is as follows: a plurality of legs 14 are discretely distributed circumferentially on the middle outer walls of the main material bin 1 and the auxiliary material bin 2, and a weighing sensor 12 is arranged under each leg 14; a plurality of support frames 15 are discretely distributed circumferentially on the middle outer walls of the first review bin 6 and the second review bin 7, and a weighing sensor 12 is arranged under each support frame 15, and each weighing sensor 12 is electrically connected to the controller 13 respectively; weighing sensors 12 are also connected to the plurality of pillars of the slurry mixing and stirring barrel 3, and each weighing sensor 12 is also electrically connected to the controller 13 respectively.

[0039] like Figure 1As shown, the slurry mixing and stirring barrel 3 is also connected to a plurality of liquid slurry storage tanks 17 through a metering pump 16, and the metering pump 16 corresponds to the liquid slurry storage tank 17 one by one. The slurry in the liquid slurry storage tank 17 is pumped into the slurry mixing and stirring barrel 3 through the metering pump 16; the top of the slurry mixing and stirring barrel 3 is also connected to a metering water injection pipe 18, and a flow valve 19 is provided on the metering water injection pipe 18. The metering pump 16 and the flow valve 19 are respectively electrically connected to the controller 13 and controlled by the controller 13. The controller 13 can control the metering pump 16 to pump a certain amount of liquid slurry into the slurry mixing and stirring barrel 3 according to the needs of the process formula, and can also control the flow valve 19 to open according to the needs of the process formula to inject a certain amount of clean water or other types of solutions into the slurry mixing and stirring barrel 3.

[0040] In this embodiment, preferably, an arch breaking device 20 is provided between the discharge port of each of the main material bin 1 and the auxiliary material bin 2 and the screw conveyor 5, and an arch breaking device 20 is provided between the discharge port of the first recheck bin 6 and the second recheck bin 7 and the second valve 8, so as to break the agglomerated materials in the bin and make the materials fall smoothly.

[0041] The arch breaking device 20 is commonly an electric vibrator, but in order to avoid the influence of the electric vibrator on the weighing accuracy of the weighing sensor 12, the present embodiment provides another arch breaking device structure, which specifically includes a coaxially arranged inner cylinder 20a, an outer cylinder 20b and an annular sealing plate 20c connected to both ends of the inner and outer cylinders 20a, 20b, an annular air cavity 20d is formed between the inner and outer cylinders 20a, 20b, an annular piston 20e is arranged inside the air cavity 20d, an annular magnet 20f is connected to the lower end of the annular piston 20e, and an electromagnet 20f facing the annular piston 20e is arranged on the annular sealing plate 20c below the annular piston 20e 0g, the electromagnet 20g is electrically connected to the controller 13 and is controlled by the controller 13. A plurality of exhaust holes 20h are evenly distributed in the circumferential direction in the middle of the inner cylinder 20a. A detection hole 20i located above the exhaust hole 20h is opened on the outer cylinder 20b. An air pressure sensor 20j is inserted in the detection hole 20i. The air pressure sensor 20j is sealed and connected to the detection hole 20i. The air pressure sensor 20j is electrically connected to the controller 13. Several one-way air nozzles 20k are connected to the outer edge of the annular sealing plate 20c at the top. The one-way air nozzles 20k are connected in parallel with the air outlet end of an air compressor 21. The one-way air nozzles 20k only take in air but not discharge air.

[0042] The upper end of the electromagnet 20g produces the same magnetic pole as the annular magnet 20f, so the two repel each other, resisting the downward movement of the annular piston 20e, isolating the exhaust hole 20h from the annular air cavity 20d above the annular piston 20e. However, as the air compressor 21 continues to inject air into the annular air cavity 20d, the air pressure above the annular piston 20e gradually increases, forcing the annular piston 20e to move downward. When the air pressure detected by the air pressure sensor 20j reaches a preset value, the controller 13 controls the electromagnet 20g to stop working, the magnetic field of the electromagnet 20g disappears, and the annular piston 20e moves downward rapidly, connecting the exhaust hole 20h with the annular air cavity 20d above the annular piston 20e. The high-pressure air is quickly discharged from the exhaust hole 20h to form a powerful pulse airflow that impacts upward, breaking up the agglomerated materials and allowing the materials to fall smoothly. At the same time, the air pressure value detected by the air pressure sensor 20j drops below the preset value, and the controller 13 starts the electromagnet 20g again. The magnetic field of the electromagnet 20g is generated and the annular piston 20e is quickly pushed upward to close the exhaust hole 20h. This cycle repeats, and the arch breaking device 20 intermittently emits pulse airflow to impact the material, so that the material always remains in a loose state.

[0043] The arch-breaking device 20 of this structure will not affect the detection result of the weighing sensor 12, and thus can ensure the batching accuracy of the high-precision automatic batching and transportation system.

[0044] In this embodiment, it is further preferred that a large number of air-replenishing holes 22 extending obliquely downward are evenly distributed circumferentially on the top side walls of the first and second re-check bins 6 and 7, and filter cloths 23 covering all the air-replenishing holes 22 are sleeved on the outer walls of the first and second re-check bins 7 and 7.

[0045] By arranging air supply holes 22 on the upper part of the first review bin 6 and the second review bin 7, a top-down cleaning airflow is formed in the first review bin 6 and the second review bin 7, so as to clean the materials on the inner walls of the first review bin 6 and the second review bin 7, reduce the amount of residual materials in the first review bin 6 and the second review bin 7, and further improve the batching accuracy of the automatic batching pulping system.

[0046] The method for performing high-precision automatic batching and conveying using the high-precision automatic batching and conveying system of this embodiment includes the following specific steps: a. Use each weighing sensor 12 to detect the weight of each main material bin 1, auxiliary material bin 2, first recheck bin 6, and second recheck bin 7 in an empty bin state and store or perform zero calibration.

[0047] b. Replenish materials to each main material bin 1 and each auxiliary material bin 2, and then use the weighing sensors 12 of each main material bin 1 and each auxiliary material bin 2 to detect the weight of the material storage state of each main material bin 1 and each auxiliary material bin 2 and calculate the material weight.

[0048] c. The controller controls the screw conveyor 5 at the lower end of the main material bin 1 or the auxiliary material bin 2 storing various materials to rotate and feed the materials according to the weight of the materials input by the operator, and continuously detects the weight change of the materials in each main material bin 1 and each auxiliary material bin 2 in the feeding state. When the weight change of any material is equal to the weight required for the compatibility, the controller 13 closes the screw conveyor 5 conveying the material and the first discharge valve 25, and each screw conveyor transports the material to the corresponding first review bin 6 or second composite bin 7.

[0049] d. The weighing sensors 12 on the first re-check bin 6 and the second re-check bin 7 continuously detect the weight of the materials in the bins and feed back to the controller 13. The difference Mm between the increase in material weight m in the first re-check bin 6 and the sum M of the decrease in material in each main bin 1 should be within a preset accuracy range. When it exceeds this range, the controller 13 alarms and suspends the running screw conveyor 5; the difference M'-m' between the increase in material weight m' in the second re-check bin 7 and the sum M' of the decrease in material in each auxiliary bin 2 should be within a preset range. When it exceeds this range, the controller 13 alarms and suspends the running screw conveyor 5.

[0050] e. After the feeding of the main material bin 1 and the auxiliary material bin 2 is completed and the first recheck bin 6 and the second recheck bin 7 confirm that the weight of the materials therein is correct, a predetermined amount of water is added to the slurry mixing, stirring and modulation barrel 3 according to the process requirements, and the slurry mixing, stirring and modulation barrel 3 is started for stirring; the controller 13 starts the vacuum feeder 11 and the metering pump 16, and controls the second valve 8 at the bottom of the first recheck bin 6 and the second recheck bin 7 to open according to the process sequence, and the materials in the first recheck bin 6 and the second recheck bin 8 fall into the negative pressure feeding pipe 10 in sequence and are sucked into the slurry mixing, stirring and modulation barrel 3 by negative pressure; at the same time, the first recheck bin 1 The weighing sensors 12 on the verification bin 6 and the second review bin 7 continue to detect the weight of the materials in the bins until the detection data remains unchanged, and calculate whether the remaining material in the bin meets the matching error requirements. If the remaining material in the bin exceeds the error range of the material matching weight, the controller 13 alarms and maintains the working state of the vacuum feeder 11 until the operator eliminates the fault and reduces the error to a reasonable range. The controller 13 then delays for a certain period of time and then shuts down the vacuum feeder 11; the metering pump 16 pumps the liquid slurry in the liquid slurry storage tank 17 into the slurry mixing and stirring barrel 3 according to the process sequence.

[0051] f. During the stirring process, add the total amount of water according to the process requirements, and complete the stirring until it is evenly stirred.

[0052] g. Check whether the total amount of materials in the slurry mixing and stirring barrel 3 is consistent with the sum of the weights of various raw materials and water. If not, an alarm is triggered for manual review; if consistent, the prepared slurry is injected into the high-pressure boiling barrel 4 for high-pressure cooking. Both the inconsistency and consistency here have error space and do not necessarily need to be completely consistent. The size of the error is set by the user according to the actual transportation volume of the material.

[0053] As a further improvement to the above technical solution, when implementing the above step c, each main material bin 1 storing the required compound materials is fed in sequence, and each auxiliary material bin 2 storing the required compound materials is also fed in sequence.

[0054] The controller 13 is connected to warning lights corresponding to each main material bin 1 and each auxiliary material bin 2, and is also connected to an alarm. When the controller 13 detects that the difference between the feeding amount of a certain material and the increased amount in the first review bin 6 or the second review bin 7 exceeds a reasonable range, an alarm is sounded and the warning lights corresponding to the main material bin 1 or the auxiliary material bin 2 storing the material are turned on, prompting employees to check for faults.

[0055] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A high-precision automatic batching and conveying system for slurry preparation, comprising a plurality of main material bins (1) and a plurality of auxiliary material bins (2), and at least one slurry mixing and stirring modulation barrel (3), wherein each of the main material bins (1) and the auxiliary material bins (2) is connected to a feed port of the slurry mixing and stirring modulation barrel (3), and a discharge port of the slurry mixing and stirring modulation barrel (3) is used to connect to a feed port of a high-pressure pulp cooking barrel (4), characterized in that: The lower ends of the plurality of main material bins (1) are respectively gathered to the first recheck bin (6) through the screw conveyors (5), and the lower ends of the plurality of auxiliary material bins (2) are respectively gathered to the second recheck bin (7) through the screw conveyors (5). The lower ends of the first recheck bin (6) and the second recheck bin (7) are respectively connected to the negative pressure feed pipe (10) through the second valve (8) and the soft connection structure (9). The downstream end of the negative pressure feed pipe (10) is connected to the feed inlet of the slurry mixing and stirring barrel (3) through a vacuum feeder (11). The discharge end of each screw conveyor (5) is connected to the feed inlet of the slurry mixing and stirring barrel (3). A first valve (25) is provided on each of the main material bin (1), the auxiliary material bin (2), the first check bin (6), and the second check bin (7). A weighing sensor (12) is provided on each of the main material bins (1), the auxiliary material bins (2), the first check bin (6), and the second check bin (7). Each weighing sensor (12) is connected to a controller (13). The controller (13) is electrically connected to each of the screw conveyors (5), the first valve (25), the second valve (8), and the vacuum feeder (11) to control the actions of each of the screw conveyors (5), the first valve (25), the second valve (8), and the vacuum feeder (11).

2. The high-precision automatic batching and conveying system according to claim 1 is characterized in that: Each slurry mixing and stirring barrel (3) is provided with a weighing sensor (12), and the weighing sensor (12) is also connected to the controller (13).

3. The high-precision automatic batching and conveying system according to claim 1 is characterized in that: The discharge port of each slurry mixing, stirring and modulating barrel (3) is located above the feed port of the high-pressure slurry cooking barrel (4).

4. The high-precision automatic batching and conveying system according to claim 1 is characterized in that: A plurality of legs (14) are discretely distributed circumferentially on the central outer walls of the main material bin (1) and the auxiliary material bin (2), and a weighing sensor (12) is arranged below each leg (14); a plurality of support frames (15) are discretely distributed circumferentially on the central outer walls of the first recheck bin (6) and the second recheck bin (7), and a weighing sensor (12) is arranged below each support frame (15), and each weighing sensor (12) is electrically connected to a controller (13).

5. The high-precision automatic batching and conveying system according to claim 1 is characterized in that: The slurry mixing and stirring modulation barrel (3) is also connected to a plurality of liquid slurry storage tanks (17) via a metering pump (16), and the metering pumps (16) correspond to the liquid slurry storage tanks (17) one by one. The slurry in the liquid slurry storage tanks (17) is pumped into the slurry mixing and stirring modulation barrel (3) via the metering pump (16); a metering water injection pipe (18) is also connected to the top of the slurry mixing and stirring modulation barrel (3), and a flow valve (19) is provided on the metering water injection pipe (18). The metering pump (16) and the flow valve (19) are respectively electrically connected to the controller (13) and are controlled by the controller (13).

6. The high-precision automatic batching and conveying system according to any one of claims 1 to 5, characterized in that: An arch breaking device (20) is provided between the discharge port of each of the main material bin (1) and the auxiliary material bin (2) and the screw conveyor (5), and an arch breaking device (20) is provided between the discharge port of each of the first recheck bin (6) and the second recheck bin (7) and the second valve (8).

7. The high-precision automatic batching and conveying system according to any one of claims 1 to 4, characterized in that: A large number of air replenishment holes (22) extending obliquely downward are evenly distributed in the circumferential direction on the top side walls of the first recheck bin (6) and the second recheck bin (7), and filter cloths (23) covering all the air replenishment holes (22) are sleeved on the outer walls of the first recheck bin (7) and the second recheck bin (7).

8. A high-precision automatic batching and conveying method based on the high-precision automatic batching and conveying system according to any one of claims 1 to 4, characterized in that: The specific steps include: a. Use each weighing sensor to detect the weight of each main material bin, auxiliary material bin, first recheck bin, and second recheck bin in empty state and store or calibrate to zero; b. Replenish materials to each main material bin and each auxiliary material bin, and then use the weighing sensors of each main material bin and each auxiliary material bin to detect the weight of the storage material status of each main material bin and each auxiliary material bin and calculate the material weight; c. The controller controls the screw conveyor at the lower end of the main material bin or auxiliary material bin storing various materials to rotate and feed the materials according to the weight of the materials input by the operator, and continuously detects the weight change of the materials in each main material bin and each auxiliary material bin in the feeding state. When the weight change of any material is equal to the weight required for the compatibility, the controller closes the screw conveyor conveying the material and the first discharge valve, and each screw conveyor conveys the material to the corresponding first review bin or second composite bin; d. The weighing sensors on the first and second recheck bins continuously detect the weight of the materials in the bins and feed back to the controller. The difference Mm between the increase in the weight m of the materials in the first recheck bin and the sum of the decreases in the weight of the materials in each main bin should be within a preset accuracy range. When it exceeds this range, the controller will alarm and suspend the running screw conveyor. The difference M'-m' between the increase in the weight m' of the materials in the second recheck bin and the sum of the decreases in the weight of the materials in each auxiliary bin should be within a preset range. When it exceeds this range, the controller will alarm and suspend the running screw conveyor. e. After the feeding of each main material bin and auxiliary material bin is completed and the first and second review bins confirm that the weight of the materials therein is correct, a predetermined amount of water is added to the slurry mixing, stirring and modulation barrel according to the process requirements, and the slurry mixing, stirring and modulation barrel is started for stirring; the controller starts the vacuum feeder and the dosing pump, and controls the second valve at the bottom of the first and second review bins to open according to the process sequence, and the materials in the first and second review bins fall into the negative pressure feed pipe in sequence and are sucked into the slurry mixing, stirring and modulation barrel by negative pressure; at the same time, the weighing sensors on the first and second review bins continue to detect the weight of the materials in the bins until the detection data remains unchanged, and calculate whether the remaining materials in the bins meet the compatibility error requirements. If the remaining materials in the bins exceed the error range of the material compatibility weight, the controller alarms and maintains the working state of the vacuum feeder until the operator eliminates the fault and reduces the error to a reasonable range, and the controller delays for a certain period of time and then shuts down the vacuum feeder; the dosing pump pumps the liquid slurry into the slurry mixing, stirring and modulation barrel according to the process sequence; f. During the stirring process, add the total amount of water according to the process requirements, and complete the stirring after stirring evenly; g. Check whether the total amount of material in the slurry mixing and stirring barrel is consistent with the sum of the weight of various raw materials and water. If not, an alarm will be issued for manual review; if consistent, the prepared slurry will be injected into the high-pressure cooking barrel for high-pressure cooking.

9. The high-precision automatic batching and conveying method according to claim 8, characterized in that: When the above step c is implemented, each main material bin storing the required compound materials is fed in sequence, and each auxiliary material bin storing the required compound materials is also fed in sequence.

10. The high-precision automatic batching and conveying method according to claim 9, characterized in that: The controller is connected to warning lights corresponding to each main material bin and each auxiliary material bin, and is also connected to an alarm. When the controller detects that the difference between the feed amount of a certain material and the increase in the first review bin or the second review bin exceeds a reasonable range, an alarm is sounded and the warning lights corresponding to the main material bin or the auxiliary material bin storing the material are turned on, prompting employees to troubleshoot the problem.

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