Material adding and mixing method and device and control method

Abstract

The invention belongs to the technical field of feed production and processing equipment. The material adding and mixing method is characterized by comprising the following steps: calculating the weight of liquid required for spraying a material to be mixed according to the weight of the material to be mixed according to the material formula proportioning requirement; the materials are conveyed to a feeding port of the mixing machine, and meanwhile liquid is conveyed to the feeding port of the mixing machine through a pump set and sprayed to the surfaces of the falling materials to be mixed; the materials to be mixed and the liquid are fully mixed, stirred, scattered and discharged in the mixing machine. The technical problems that an existing mixing machine is poor in mixing effect, small in capacity and large in residue amount are solved. The invention also relates to a material adding and mixing device for realizing the material adding and mixing method. The invention further relates to a control method of the material adding and mixing device.

Description

Technical Field

[0001] The present invention belongs to the technical field of feed production and processing equipment, and specifically relates to a material adding and mixing method. The present invention also relates to a material adding and mixing device, which is used to implement the material adding and mixing method. The present invention further relates to a control method of the material adding and mixing device. Background Art

[0002] The mixing section of a feed factory often requires adding a large amount of liquid to the material. The existing equipment for adding and mixing feed liquids includes batch mixers and single-shaft continuous mixers. However, the proportion of liquid added by traditional batch mixers is limited, generally up to about 5%. When a high proportion of liquid is added, the mixer is prone to overcurrent, resulting in production interruption. The production volume can only be reduced to maintain production at a small capacity. The production efficiency is low and the mixing effect is poor, especially for viscous liquids, such as molasses. The production capacity drops by 25-50%, and the material residue inside the equipment is large and difficult to clean. Batch mixers will be difficult to arrange in factories with limited height. In single-shaft continuous mixers, materials and liquids are measured by volume, with poor measurement accuracy, large errors in the ratio of liquids and materials, affecting quality. The single-shaft mixing structure has a short mixing time, poor mixing uniformity, a large amount of head material and tail material, and high labor intensity in handling.

[0003] In addition, whether it is a batch mixer or a single-shaft continuous mixer, the material is first transported into the mixer, and then the liquid is sprayed, and then mixed, stirred, broken up, and discharged. With the above process, the liquid first contacts the powder on the surface of the mixer, and it is easy to agglomerate. In addition, after the mixer works, the material and the liquid are not in sufficient contact, and the mixing effect is poor. Summary of the invention

[0004] The first object of the present invention is to provide a material adding and mixing method to solve the technical problems of poor mixing effect, small production capacity and large residue of existing mixers.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme, a material adding and mixing method, characterized in that the method comprises the following steps: According to the material formula ratio requirements and the weight of the material to be mixed, calculate the weight of the liquid required for spraying the mixed material; The material is transported to the feed port of the mixer. At the same time, the liquid is transported to the feed port of the mixer through the pump group and sprayed on the surface of the falling material to be mixed; The material to be mixed and the liquid are fully mixed, stirred, and dispersed in the mixer, and then discharged.

[0006] When feeding the mixer, the present invention feeds and sprays at the feed port at the same time. In the dynamic process of feeding, the material is in a dispersed state, fully contacts with the spraying liquid, and is sprayed evenly. Afterwards, the material is mixed, stirred, and dispersed by the mixer to further improve the mixing effect of the powder and the liquid, and achieve accurate proportioning of the liquid and the material.

[0007] The present invention is suitable for liquid addition, mixing and breaking up of one or more powdered materials. One or more different liquids can be sprayed onto the product mixture, such as the production of ruminant feed, the production of fermented feed, etc.

[0008] In order to solve the technical problem that the actual liquid addition ratio is inconsistent with the theoretical liquid addition ratio, resulting in mismatch between the material amount and the liquid amount, the present invention adopts the following technical solution, and the method also includes: The speed of the pump group can be adjusted according to the proportion of liquid added; The weight of the material entering the mixer is obtained in real time by using the first weighing sensor; The second weighing sensor is used to obtain the pumping volume of the liquid in real time; the actual liquid addition ratio is compared with the theoretical liquid addition ratio. According to the difference between the two, the speed of the pump group is adjusted to control the actual liquid addition ratio within the allowable error range, thereby ensuring the accurate ratio of real-time material and real-time liquid.

[0009] The materials and liquids are measured by scales, which are accurate. The control system counts the weight of dry materials and liquids in real time, compares them with the theoretical liquid addition ratio, and corrects the pump flow to control the actual liquid addition ratio within the allowable error range.

[0010] In order to solve the technical problem that the real-time material is inconsistent with the theoretical feeding amount, the present invention adopts the following technical solution, which also includes a material conveying method, using at least two sets of material feeding mechanisms to alternately convey materials to the mixer to ensure the continuity of material conveying; The first weighing sensor of each group of material feeding mechanism is used to obtain the discharge flow of each group of material feeding mechanism. According to the material formula ratio requirements, the feeding speed is adjusted, and then the feeding amount entering the mixer is adjusted to ensure real-time and accurate material supply.

[0011] In order to solve the technical problem that the real-time liquid addition amount is inconsistent with the theoretical addition amount, the present invention adopts the following technical solution, which also includes a liquid delivery method, using at least two groups of liquid adding mechanisms to alternately provide sprayed liquid to the mixer to ensure the continuity of liquid delivery; During the liquid spraying and adding process, the liquid is sprayed onto the falling material surface from both sides of the feed port; compressed air is passed through the spray nozzle, and the compressed air pressure is used to assist the atomization of the nozzle; according to the pressure value of the pump group's outlet pipeline and the liquid addition ratio, the number of spray nozzles opened and the spraying amount are controlled to ensure real-time and accurate liquid supply.

[0012] In order to solve the technical problem of waste of head material and tail material, the present invention adopts the following technical solution, and the method also includes a material discharging control method: When the mixer just starts working, collect the head material; When the mixer works normally, discharge the material; When the mixer enters the temporary shutdown stage, stop material transportation, stop liquid transportation and spraying, and collect the machine tailings; When the mixer enters the shutdown stage, material transportation is stopped, liquid transportation and spraying are stopped, and the tail material is collected; the collected head material and tail material are transported to the mixer, mixed again, and the mixer is washed with the head material and tail material. This cycle is repeated N times and the material is discharged, thus realizing the processing of head material and tail material.

[0013] The second object of the present invention is to provide a material adding and mixing device for realizing the material adding and mixing method according to any of the above items, so as to solve the problems of the existing mixing and adding methods and equipment, such as the mixer is prone to overcurrent when a high proportion of liquid is added, high residue, difficult to clean, large error in the liquid and material ratio, poor mixing uniformity, large amount of head material and tail material, and high labor intensity in processing.

[0014] In order to solve the above technical problems, the present invention adopts the following technical solution, and the material adding and mixing device comprises: The material-incoming mechanism comprises a plurality of material-incoming components arranged in parallel; The liquid adding mechanism comprises a plurality of liquid adding components arranged in parallel; the discharge ends of the liquid adding components are respectively connected to the pump groups; The mixing mechanism comprises a collecting hopper and a mixer connected to each other; the collecting hopper is used to receive the materials delivered by the material incoming mechanism; the feed port of the mixer is connected to the discharge port of the collecting hopper, a liquid adding spraying pipeline is arranged on the feed port of the mixer, and the liquid adding spraying pipeline is connected to the pump group.

[0015] The invention has high mixing efficiency, small installation space, low residue, easy cleaning, high automation, accurate liquid and material ratio, and is suitable for mixing a limited number of materials. One or more different liquids are sprayed onto the product mixture.

[0016] In order to solve the technical problem of waste of head material and tail material of the machine, the present invention adopts the following technical solution: a discharging tee is provided on the discharging port of the mixer, and two outlets are provided on the discharging tee, and the two outlets are respectively connected to a discharging bin and a temporary storage bin, and a high material level and a low material level are respectively provided on the discharging bin and the temporary storage bin; The discharge bin is used to temporarily store the normal production discharge; The temporary storage bin is used to temporarily store the head and tail materials of the mixer; the temporary storage bin is connected to the feed port of the collecting bucket via an elevator. The head and tail materials are first transported to the temporary storage bin, and after the production is completed, they are transported back to the mixer for processing, so the utilization rate of raw materials is high.

[0017] In order to solve the technical problem of how to realize the incoming material component, the present invention adopts the following technical solution, wherein the incoming material component includes a silo, a feeder, a weight loss scale, and a feeder connected in sequence; The silo is provided with a high material level and a low material level; The weight loss scale is provided with a first weighing sensor; The rotation speed of the feeder is adjustable.

[0018] In order to solve the technical problem of how to realize the liquid adding component, the present invention adopts the following technical solution, and the liquid adding component includes: A weighing cylinder, on which a liquid inlet pipeline, a liquid level meter, a second weighing sensor, and a liquid outlet pipeline are arranged; a liquid inlet valve is arranged on the liquid inlet pipeline; a liquid outlet valve and a maintenance valve are arranged on the liquid outlet pipeline; a debris discharge pipeline is arranged on the liquid outlet pipeline, and a debris discharge valve is arranged on the debris discharge pipeline; The stirring assembly is arranged in the weighing cylinder.

[0019] In order to solve the technical problem of how to realize the pump group, the present invention adopts the following technical solution, and the pump group includes: An infusion pipeline, a filter cartridge, an inspection valve, a pump, a safety valve, a pressure sensor, a pressure gauge, and a valve arranged in sequence along the liquid flow direction on the infusion pipeline; A cleaning pipeline is arranged at the discharge end of the infusion pipeline, and a cleaning valve is arranged on the cleaning pipeline; A waste discharge pipeline is arranged at the feed end of the infusion pipeline, and a waste discharge valve is arranged on the waste discharge pipeline; The rotation speed of the pump on the infusion pipeline is adjustable.

[0020] In order to solve the technical problem of how to realize the liquid adding spraying pipeline, the present invention adopts the following technical solution, and the liquid adding spraying pipeline includes: A main pipeline is connected to the liquid outlet of the pump group, and a branch pipeline is arranged in parallel on the main pipeline; The spray pipeline is obliquely arranged on the corresponding branch pipeline. A nozzle and a control valve are arranged on the spray pipeline. The nozzle includes a liquid inlet, an air inlet and an outlet. The air inlet is used to connect compressed air. The control valve is used to control the on-off of the spray pipeline.

[0021] In order to solve the technical problem of how to install the liquid adding spraying pipeline, the present invention adopts the following technical solution, which is characterized in that the nozzle is a Y-shaped structure, the liquid inlet and the outlet are in a straight line, and the air inlet is inclined relative to the liquid inlet; The outlet of the nozzle is circular or straight; The main pipeline, branch pipeline and spray pipeline are all located outside the feed port of the mixer, the nozzle is installed obliquely on the side wall of the feed port, and the outlet of the nozzle is located inside the feed port; the control valve and the air inlet of the nozzle are located outside the discharge port.

[0022] In order to solve the technical problem of low mixing efficiency of the existing mixer, the present invention adopts the following technical solution, and the mixing mechanism comprises: A mixing chamber, wherein the mixing chamber comprises a first mixing chamber and a second mixing chamber which are arranged crosswise and overlapped, and the feed port is arranged at the crosswise and overlapping position of the first mixing chamber and the second mixing chamber; The rotor assembly includes a first rotor and a second rotor arranged side by side; the first rotor is arranged in the first mixing chamber; the second rotor is arranged in the second mixing chamber, and the first rotor and the second rotor are arranged crosswise; the first rotor and the second rotor are arranged in opposite directions.

[0023] The present invention adopts a continuous rotor blade stirring and conveying structure, which has high mixing efficiency and low energy consumption; the cylinder body has a small diameter, which can reduce the installation space and is beneficial to the occasions with limited height; the volume space is small, and the residue is easy to clean.

[0024] The present invention is further improved in that a plurality of the incoming material components share a weight loss scale; The number of the incoming material components is 2; The number of the liquid adding components is 2, including a first liquid adding component and a second liquid adding component arranged in parallel; the first liquid adding component and the second liquid adding component are used to alternately provide the spraying liquid to the mixer; The first liquid adding component comprises a first weighing cylinder, on which a first liquid inlet pipeline, a first liquid level meter, a second weighing sensor 1, and a first liquid outlet pipeline are arranged; a first liquid inlet valve is arranged on the first liquid inlet pipeline; a first liquid outlet valve and a first inspection valve are arranged on the first liquid outlet pipeline; a first impurity discharge pipeline is arranged on the first liquid outlet pipeline, and a first impurity discharge valve is arranged on the first impurity discharge pipeline; a first stirring component is arranged in the first weighing cylinder; The second liquid adding component includes a second weighing cylinder, on which a second liquid inlet pipeline, a second liquid level meter, a second weighing sensor 2, and a second liquid outlet pipeline are arranged; a second liquid inlet valve is arranged on the second liquid inlet pipeline; a second liquid outlet valve and a second inspection valve are arranged on the second liquid outlet pipeline; a second impurity discharge pipeline is arranged on the second liquid outlet pipeline, and a second impurity discharge valve is arranged on the second impurity discharge pipeline; and a second stirring component is arranged in the second weighing cylinder.

[0025] The third object of the present invention is to provide a control method for a material adding and mixing device, characterized in that the control method comprises: Set the production parameters corresponding to the recipe: set the maximum weight M2 and minimum weight M1 of the weight loss scale for feeding control, set the maximum weight m2 and minimum weight m1 of the weighing cylinder for liquid inlet control, and set the target flow rate Q of the weight loss scale according to the recipe ratio requirements. i , the target flow rate of the weighing cylinder spraying liquid is q; the liquid addition ratio is n%, n%=q / (∑Q i )×100%; Start the feeder, and feed the material to the weight loss scale. When the weight reaches M2, the feeder stops feeding; Start stirring in the weighing cylinder, open the liquid inlet valve, add liquid to the weighing cylinder, and close the liquid inlet valve after the weight reaches m2; During production: Start the mixer and feeder, open the outlet valve of the weighing cylinder, and the feeder will flow according to the set target flow rate Q. i and the weight change value of the first weighing sensor, adjust the feeding speed so that the actual flow rate reaches the set target flow rates Q1 and Q2; At the same time, open the nozzle pipeline, liquid outlet valve, valve, and pump, and adjust the speed of the pump according to the set spray liquid target flow q and the weight change value of the second weighing sensor, so that the actual flow reaches the set coating liquid target flow q, and the time is ≤10 seconds. At this time, it is the head material stage of just starting the machine, and the discharge tee is connected to the temporary storage bin, and the head material enters the temporary storage bin; When the actual flow rates of the weight loss scale and weighing cylinder reach the target flow rates, the discharge tee is switched to the discharge bin and normal production begins; During the production process, if the weight value of the weight loss scale becomes M1, the feeder is started to add material to the weight loss scale until the weight reaches M2. During the feeding process, the feeder speed remains unchanged; The material on the weight loss scale is transported to the collecting hopper through the feeder, and meets the liquid sprayed by the weighing cylinder through the liquid pump group at the feed port of the mixer. The liquid is sprayed on the surface of the falling dry material from both sides of the feed port. The compressed air is passed through the air inlet of the nozzle, and the air pressure is used to assist the atomization of the nozzle, and then stirred and mixed, and discharged through the discharge port; During the liquid spraying and adding process, the number of nozzle openings of the nozzle pipelines of the two branch pipelines is adjusted according to the pipeline pressure value fed back by the pressure sensor; Obtain the weight M of the material in the real-time weight loss production process and the weight m of the liquid used in the weighing cylinder, calculate the actual liquid addition ratio m / M×100%, compare it with the theoretical liquid addition ratio n%, and adjust the pump flow rate to control the actual liquid addition ratio within the allowable error range.

[0026] In order to solve the technical problem that a liquid addition component runs out of liquid and cannot be produced continuously, the present invention adopts the following technical solution, and the control method also includes: If the weight of the first weighing cylinder is reduced to m1, the first liquid outlet valve is closed, the second liquid outlet valve is opened, the second weighing cylinder is switched, and then the first liquid inlet valve is opened to add liquid to the first weighing cylinder until the weight reaches m2, and the first liquid inlet valve is closed; If the weight of the second weighing cylinder is reduced to m1, the second liquid outlet valve is closed, the first liquid outlet valve is opened, the first weighing cylinder is switched, and then the second liquid inlet valve is opened to add liquid to the second weighing cylinder until the weight reaches m2, and the second liquid inlet valve is closed. The first weighing cylinder and the second weighing cylinder work in this cycle; The liquid level meter is used to detect the liquid level in the weighing cylinder. When the liquid level meter has a signal, the weighing cylinder stops feeding liquid. When there is no signal of the low material level of the silo of the incoming material component, the front end will refill the silo until there is a signal of the high material level of the silo of the incoming material component, and then stop refilling; When there is a signal of the high material level of the discharge bin, the discharge bin is full and the discharge bin needs to speed up the material discharge. If there is still a signal after the set time, the three-way switch needs to be switched to the temporary storage bin; if there is also a signal of the high material level of the temporary storage bin, the upstream needs to be shut down; When there is no signal at the low material level of the discharge bin, it means that the discharge bin is short of material or is empty, and the upstream can feed normally; When there is a signal for the high material level of the temporary storage bin, the temporary storage bin is full and no more material can be fed into the bin; when there is no signal for the low material level of the temporary storage bin, it means that the temporary storage bin is short of material or is empty, and material can be fed from the upstream.

[0027] In order to solve the technical problem of how to control temporary shutdown, the present invention adopts the following technical solution, wherein the control method further includes: Temporary shutdown for production suspension: the material adding and mixing device enters the shutdown stage, stops the feeder; stops the pump; closes the liquid outlet valve of the current weighing cylinder; closes the valve of the pump group; closes the spray pipeline; switches the discharge tee to the temporary storage silo, discharges the tail material to the temporary storage silo, and delays the shutdown of the mixer.

[0028] In order to solve the technical problem of how to control shutdown, the present invention adopts the following technical solution, wherein the control method further comprises: Production is about to end: the production plan requirement is reached, that is, the raw materials prepared at the front end have been produced: when the low material level of the first weight loss scale and the low material level of the second weight loss scale have no signal, and there is no raw material replenishment at the front end, it enters the shutdown stage, and the required liquid dosage is calculated according to the remaining material weight of the first weight loss scale and the second weight loss scale, and compared with the total weight of the remaining liquid in the first weighing cylinder and the second weighing cylinder; If the total weight of the liquid remaining in the first weighing cylinder and the second weighing cylinder is insufficient, the corresponding difference is supplemented; If the total weight of the liquid in the first weighing cylinder and the second weighing cylinder exceeds the liquid usage, the first weighing cylinder and the second weighing cylinder stop replenishing the liquid; When the weight of the material on the first and second weight-loss scales is zero, stop the feeder; stop the pump; close the liquid outlet valve of the current weighing cylinder, close the first and second stirring; close the valve; open the cleaning valve; switch the discharge tee to the temporary storage bin, and discharge the tail material to the temporary storage bin; Then, the elevator is started, and the head material and tail material stored in the temporary storage bin are lifted to the outlet by the elevator and enter the collection bucket, and then mixed again by the mixer and enter the temporary storage bin, and the cycle is repeated 2-3 times; Then, the discharge tee is switched to the discharge bin, and the final mixed material is discharged into the discharge bin, until the material in the temporary storage bin finally enters the discharge bin through the elevator, the collecting bucket, the mixer, and the feed tee; Finally, the elevator is turned off; the nozzle pipeline is turned off; the mixer is turned off, and the feed tee is switched to the temporary storage bin. The present invention can realize the processing of the head and tail materials of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the material adding and mixing device of the present invention.

[0030] Figure 2 It is a schematic diagram of the main structure of the mixer of the present invention.

[0031] Figure 3 The present invention Figure 2 Left view of .

[0032] Figure 4 It is a schematic diagram of the overall structure of the rotor of the present invention.

[0033] Figure 5 It is a structural schematic diagram of the liquid adding spraying pipeline of the present invention; Figure 6 It is a structural schematic diagram of the incoming material assembly of the present invention; Figure 7 It is a structural schematic diagram of the liquid adding system of the present invention; Figure 8 It is a structural schematic diagram of the mixing mechanism of the present invention; In the figure: Mixer 1, barrel 1-1, feed port 1-11, discharge port 1-12, first rotor 1-2a, rotating shaft 1-21a, paddle 1-22a, second rotor 1-2b, liquid adding spraying pipeline 1-3, branch road 1-31, branch road 2 1-32, nozzle pipeline 1-33, switch valve 1-33a, nozzle 1-33b, air inlet interface 1-33c, cleaning door 1-4, buffer pad 1-5, base 1-6, first drive assembly 1-7a, second drive assembly 1-7b; The first incoming material component 100, the first material bin 2, the first high material level 2-1, the first low material level 2-2, the first feeder 3, the first weight loss scale 4, the first weighing sensor 4-1, the first feeder 4-2; The second incoming material component 200, the second material bin 2a, the second high material level 2-1a, the second low material level 2-2a, the second feeder 3a, the second weight loss scale 4a, the first weighing sensor 2 4-1a, the second feeder 4-2a; Collecting bucket 5, elevator 6, discharging tee 7, third silo 8, third highest material level 8-1, third lowest material level 8-2, fourth silo 9, fourth highest material level 9-1, fourth lowest material level 9-2; A first weighing cylinder 10, a second weighing sensor 10-1, a first liquid level meter 10-2, a first liquid inlet valve 10-3, a first stirring valve 10-4, a first liquid outlet valve 10-5, a first impurity discharge valve 10-6, and a first inspection valve 10-7; The second weighing cylinder 11, the second weighing sensor 11-1, the second liquid level meter 11-2, the second liquid inlet valve 11-3, the second stirring 11-4, the second liquid outlet valve 11-5, the second impurity discharge valve 11-6, and the second inspection valve 11-7; Liquid pump group 12, filter cartridge 12-1, third inspection valve 12-2, pump 12-3, safety valve 12-4, third exhaust valve 12-5, pressure sensor 12-6, pressure gauge 12-7, valve 12-8, cleaning valve 12-9. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Example 1 The material adding and mixing method comprises the following steps: According to the material formula ratio requirements and the weight of the material to be mixed, calculate the weight of the liquid required for spraying the mixed material; The material is transported to the feed port of the mixer. At the same time, the liquid is transported to the feed port of the mixer through the pump group and sprayed on the surface of the falling material to be mixed; The material to be mixed and the liquid are fully mixed, stirred, and dispersed in the mixer, and then discharged.

[0036] In one embodiment, the method further comprises: The speed of the pump group can be adjusted according to the proportion of liquid added; The weight of the material entering the mixer is obtained in real time by using the first weighing sensor; The second weighing sensor is used to obtain the pumping volume of the liquid in real time; the actual liquid addition ratio is compared with the theoretical liquid addition ratio. According to the difference between the two, the speed of the pump group is adjusted to control the actual liquid addition ratio within the allowable error range.

[0037] In one embodiment, the method further includes a material conveying method, using at least two sets of material supply mechanisms to alternately convey materials to the mixer to ensure the continuity of material conveying; The first weighing sensor of each group of material feeding mechanism is used to obtain the discharge flow rate of each group of material feeding mechanism, and the feeding speed is adjusted according to the material formula ratio requirements, thereby adjusting the feeding amount entering the mixer.

[0038] In one embodiment, the method further comprises a liquid delivery method, using at least two sets of liquid adding mechanisms to alternately provide the sprayed liquid to the mixer to ensure the continuity of liquid delivery; During the liquid spraying and adding process, the liquid is sprayed onto the falling material surface from both sides of the feed port; compressed air is passed through the spray nozzle, and the compressed air pressure is used to assist the atomization of the nozzle; according to the pressure value of the pump group's outlet pipeline and the liquid addition ratio, the number of spray nozzles opened is controlled to control the spraying amount.

[0039] In one embodiment, the method further comprises a discharge control method: When the mixer just starts working, collect the head material; When the mixer works normally, discharge the material; When the mixer enters the temporary shutdown stage, stop material transportation, stop liquid transportation and spraying, and collect the machine tailings; When the mixer enters the shutdown stage, stop material transportation, stop liquid transportation and spraying, and collect the tail material; transport the collected head material and tail material to the mixer, mix them again, and use the head material and tail material to wash the mixer, repeat N times, and discharge the material.

[0040] Example 2 A material adding and mixing device for implementing the material adding and mixing method described in any one of Example 1 comprises a material incoming mechanism, a liquid adding mechanism, a mixing mechanism, and a pump group.

[0041] The material supply mechanism includes a plurality of material supply components arranged in parallel. The liquid adding mechanism includes a plurality of liquid adding components arranged in parallel; the discharge ends of the liquid adding components are respectively connected to the pump groups.

[0042] The mixing mechanism comprises a collecting hopper and a mixer connected to each other; the collecting hopper is used to receive the materials delivered by the material incoming mechanism; the feed port of the mixer is connected to the discharge port of the collecting hopper, a liquid adding spraying pipeline is arranged on the feed port of the mixer, and the liquid adding spraying pipeline is connected to the pump group.

[0043] This embodiment takes two incoming material components and two liquid adding components as examples. Figures 1 to 8 The first silo 2 of the first incoming material component 100 and the second silo 2a of the second incoming material component 200 generally store different materials, or they may store the same materials.

[0044] like Figure 1 As shown, the material adding and mixing device comprises a mixer 1, a first incoming material component 100, a second incoming material component 200, a collecting bucket 5, an elevator 6, a discharging tee 7, a third silo 8, a fourth silo 9, a first weighing cylinder 10, a second weighing cylinder 11, and a liquid pump group 12.

[0045] like Figure 1 As shown, the first incoming material component 100 includes a first silo 2, a first high material level 2-1, a first low material level 2-2, a first feeder 3, a first weight loss scale 4, a first weighing sensor 4-1, and a first feeder 4-2.

[0046] The first silo 2 consists of a first high material level 2-1 and a first low material level 2-2. The first high material level 2-1 is set at the upper part of the first silo 2, and the first low material level 2-2 is set at the bottom of the first silo 2. When there is a signal at the first high material level 2-1, it means that the first silo 2 is full and the upstream needs to stop feeding. When there is no signal at the first low material level 2-2, it means that the first silo 2 is short of material and the upstream can feed normally.

[0047] A first feeder 3 is provided at the lower end of the first material bin 2 in the first incoming material component 100, and a first weight loss scale 4 is connected below the first feeder 3.

[0048] In the first incoming material component 100, the first weight loss scale 4 controls the speed of the first feeder 4-2 according to the set feeding amount and the actual weight loss value of the first weighing sensor 4-1. During the feeding process of the first weight loss scale 4, the speed of the first feeder 4-2 remains unchanged until the feeding is completed. The first weight loss scale 4 is set with a maximum weight M2 and a minimum weight M1 for feeding control. When the weight of the material in the weight loss scale is lower than M1, the first feeder 3 starts to add material to the first weight loss scale 4 until the weight reaches M2 and stops. The first weight loss scale 4 counts the weight M of the material during the production process. When there is a signal at the first high material level 2-1, it means that the first silo 2 is full and the upstream needs to stop feeding. When there is no signal at the first low material level 2-2, it means that the first silo 2 is short of material and the upstream can feed normally.

[0049] The second incoming material component 200 includes a second material bin 2a, a second high material level 2-1a, a second low material level 2-2a, a second feeder 3a, a second weight loss scale 4a, a first weighing sensor 2 4-1a, and a second feeder 4-2a.

[0050] The second silo 2a consists of a second high material level 2-1a and a second low material level 2-2a. The second high material level 2-1a is set at the upper part of the second silo 2a, and the second low material level 2-2a is set at the bottom of the second silo 2a. When the second high material level 2-1a has a signal, it means that the second silo 2a is full and the upstream needs to stop feeding. When there is no signal at the second low material level 2-2a, it means that the second silo 2a is short of material and the upstream can feed normally.

[0051] A second feeder 3a is provided at the lower end of the second material bin 2 in the second material incoming component 200, and a second weight loss scale 4a is connected below the second feeder 3a. The control method of the second material incoming component 200 is the same as that of the first material incoming component 100.

[0052] The first incoming material assembly 100 and the second incoming material assembly 200 are arranged in parallel, and are connected to a collecting bucket 5 at the bottom, and the collecting bucket 5 is connected to a mixer 1 at the bottom.

[0053] The mixer 1 is composed of a barrel 1-1, a first rotor 1-2a, a second rotor 1-2b, a liquid adding and spraying pipeline 1-3, a cleaning door 1-4, a buffer pad 1-5, a base 1-6, a first driving assembly 1-7a, and a second driving assembly 1-7b.

[0054] The barrel 1-1 is provided with a feed port 1-11 above one end, and a discharge port 1-12 below the other end. The feed port 1-11 is connected to the collecting hopper 5, and the discharge port 1-12 is connected to the discharge tee 7.

[0055] The arc of the matching area between the bottom surface of the barrel 1-1 and the first rotor 1-2a and the second rotor 1-2b is in the shape of ω. The first rotor 1-2a and the second rotor 1-2b are parallel and concentric with the barrel 1-1 respectively. The two rotors rotate in opposite directions and simultaneously throw the material upward and convey it forward at the middle staggered position. The first rotor 1-2a is composed of a rotating shaft 1-21a and a plurality of blades 1-22a.

[0056] The mixer 1 is connected to a discharge tee 7 at the bottom, and one end of the discharge tee 7 is connected to a third silo 8, i.e., a discharge silo; the other end of the discharge tee 7 is connected to a fourth silo 9, i.e., a temporary storage silo. The tee 7 is connected to the fourth silo 9 by default. The discharge port at the bottom of the fourth silo 9 is connected to the inlet of the elevator 6, and the outlet of the elevator 6 is connected to the collecting bucket 5.

[0057] A number of cleaning doors 1-4 are arranged along the length direction of the barrel 1-1 for daily maintenance and cleaning of residues in the mixer 1; the barrel 1-1 is fixed on the base 1-6, and a number of buffer pads 1-5 are arranged between the barrel 1-1 and the base 1-6 to reduce the vibration of the mixer 1 during operation; the first drive assembly 1-7a and the second drive assembly 1-7b are located at one end of the barrel 1-1, and are respectively connected to the first rotor 1-2a and the rotating shaft 1-21a.

[0058] The cylinder of the present invention has a small diameter, which can reduce the installation space and is beneficial to the occasions with limited height; the volume space is small, and the residue is easy to clean; the two rotors of the mixer are driven independently, which is convenient for production and later maintenance and has low cost.

[0059] The first weighing cylinder 10 and the second weighing cylinder 11 are arranged in parallel and connected to one end of a liquid pump group 12 , and the other end of the liquid pump group 12 is connected to the liquid adding spraying pipeline 1 - 3 of the mixer 1 .

[0060] The first weight loss scale 4 is composed of a first weighing sensor 4-1 and a first feeder 4-2. The first weighing sensor 4-1 is used to measure the weight of the material in the first weight loss scale 4. The speed of the first feeder 4-2 is adjustable. The first weight loss scale 4 controls the speed of the first feeder 4-2 according to the set feeding amount and the actual weight loss value of the first weighing sensor 4-1. During the feeding process of the first weight loss scale 4, the speed of the first feeder 4-2 remains unchanged until the feeding is completed.

[0061] The second weight loss scale 4a is composed of a first weighing sensor 4-1a and a second feeder 4-2a. The first weighing sensor 4-1a is used to measure the weight of the material in the second weight loss scale 4a. The speed of the second feeder 4-2a is adjustable. The second weight loss scale 4a controls the speed of the second feeder 4-2a according to the set feeding amount and the actual weight loss value of the first weighing sensor 4-1a. During the feeding process of the second weight loss scale 4a, the speed of the second feeder 4-2a remains unchanged until the feeding is completed.

[0062] A plurality of interfaces are arranged at the upper end of the collecting bucket 5, which are respectively connected with the outlets of the first feeder 4-2, the second feeder 4-2a and the elevator 6, and the outlet at the lower end is connected with the feed port 1-11 of the mixer.

[0063] The liquid adding spraying pipeline includes a main pipeline and a spraying pipeline. The main pipeline is connected to the liquid outlet of the pump group, and a branch pipeline is arranged in parallel on the main pipeline. The spraying pipeline is arranged obliquely on the corresponding branch pipeline, and a nozzle and a control valve are arranged on the spraying pipeline. The nozzle includes a liquid inlet, an air inlet and an outlet, and the air inlet is used to connect compressed air; the control valve is used to control the on and off of the spraying pipeline.

[0064] Preferably, the nozzle is a Y-shaped structure, the liquid inlet and the outlet are in a straight line, and the air inlet is arranged obliquely relative to the liquid inlet. Preferably, the outlet of the nozzle is circular or straight. Preferably, the main pipeline, branch pipeline, and spray pipeline are all located outside the feed inlet of the mixer, the nozzle is installed obliquely on the side wall of the feed inlet, and the outlet of the nozzle is located inside the feed inlet; the control valve and the air inlet of the nozzle are located outside the discharge port.

[0065] Specifically, the liquid adding spraying pipeline 1-3 is composed of a branch line 1-31, a branch line 2 1-32 and a nozzle pipeline 1-33. The liquid adding spraying pipeline 1-3 is symmetrically divided into a branch line 1-31 and a branch line 2 1-32 by the main pipeline. Each branch pipeline is further divided into a plurality of nozzle pipelines 1-33. The nozzle pipeline 1-33 includes a switch valve 1-33a, a nozzle 1-33b and an air inlet interface 1-33c. The switch valve 1-33a is located at the front end of the nozzle 1-33b, and the air inlet interface 1-33c is provided. -33c is arranged between the switch valve 1-33a and the nozzle 1-33b, and each nozzle pipeline 1-33 can be independently controlled by the switch valve 1-33a to control the on and off of the branch, and the air inlet interface 1-33c is used for auxiliary atomization of the liquid. The nozzle pipeline 1-33 can be symmetrically opened in 1 group, 2 groups, 3 groups or fully opened according to the proportion of liquid addition; a plurality of nozzles 1-33b at one end of the liquid addition spray pipeline 1-3 are fixed on both sides of the feed port 1-11 of the barrel 1-1, and the other end is connected to the liquid pump group 12.

[0066] The upper inlet of the discharge tee 7 is connected to the discharge port 1-12 of the mixer 1, and the lower outlet is connected to the third silo 8 and the fourth silo 9. The third silo 8 is the discharge silo; the fourth silo is the temporary storage silo. During normal production, the lower outlet is connected to the third silo 8, and is connected to the fourth silo 9 when the machine is just started or the production is about to end or some washing materials are to be reserved.

[0067] The third silo 8 consists of a third high material level 8 - 1 and a third low material level 8 - 2 . The third high material level 8 - 1 is arranged at the upper part of the third silo 8 , and the third low material level 8 - 2 is arranged at the bottom of the third silo 8 .

[0068] The fourth silo 9 consists of a fourth high material level 9-1 and a fourth low material level 9-2. The fourth high material level 9-1 is arranged at the upper part of the fourth silo 9, and the fourth low material level 9-2 is arranged at the bottom of the fourth silo 9. The outlet of the fourth silo 9 is connected to the inlet of the elevator 6.

[0069] When there is a signal at the third highest material level 8-1, it means that the third material bin 8 is full and the bin needs to speed up the discharge. If there is still a signal after the set time, the three-way 7 needs to be switched to the fourth material bin 9. If there is also a signal at the fourth highest material level 9-1 of the fourth material bin 9, the upstream needs to be shut down. When there is no signal at the third lowest material level 8-2, it means that the third material bin 8 is short of material or is empty, and the upstream can feed normally. When there is a signal at the fourth highest material level 9-1, it means that the fourth material bin 9 is full and no more material can be fed into the bin. When there is no signal at the fourth lowest material level 9-2, it means that the fourth material bin 9 is short of material or is empty, and the upstream can feed.

[0070] The first weighing cylinder 10 is composed of a second weighing sensor 10-1, a first liquid level meter 10-2, a first liquid inlet valve 10-3, a first stirring valve 10-4, a first liquid outlet valve 10-5, a first impurity discharge valve 10-6, and a first inspection valve 10-7. The second weighing sensor 10-1 is used to measure the weight of the liquid in the first weighing cylinder 10, the first liquid level meter 10-2 is used to detect the liquid level in the first weighing cylinder 10, and the first liquid inlet valve 10-3 is used to control the on and off of the liquid inlet to the first weighing cylinder 10.

[0071] The first stirring device 10-4 is arranged on the upper cover at the top of the first weighing cylinder 10, and the stirring rod extends to the middle and lower part of the first weighing cylinder 10, and is used for stirring and mixing the liquid in the first weighing cylinder 10. The first liquid outlet valve 10-5 is arranged at the outlet of the first weighing cylinder 10. The first impurity discharge valve 10-6 and the first inspection valve 10-7 are arranged at the bottom of the outlet of the first weighing cylinder 10; the first impurity discharge valve 10-6 is normally closed and is opened when the first weighing cylinder 10 is cleaned.

[0072] The second weighing cylinder 11 is composed of a second weighing sensor 11-1, a second liquid level gauge 11-2, a second liquid inlet valve 11-3, a second stirring valve 11-4, a second liquid outlet valve 11-5, a second impurity discharge valve 11-6, and a second inspection valve 11-7. The first weighing cylinder 10 and the second weighing cylinder 11 are arranged side by side to alternately provide the sprayed liquid to the mixer 1. The second weighing sensor 11-1 is used to measure the weight of the liquid in the second weighing cylinder 11; the second liquid level gauge 11-2 is used to detect the liquid level in the second weighing cylinder 11, and the weighing cylinder stops feeding liquid when the liquid level gauge has a signal; the second liquid inlet valve 11-3 is used to control the on and off of the second weighing cylinder 11; the first liquid inlet valve 10-3 and the second liquid inlet valve 11-3 do not work at the same time.

[0073] The second stirring device 11-4 is arranged on the upper cover at the top of the second weighing cylinder 11, and the stirring rod extends to the lower middle part of the second weighing cylinder 11, and is used for stirring and mixing the liquid in the second weighing cylinder 11. The second liquid outlet valve 11-5 is arranged at the outlet of the second weighing cylinder 11; the second impurity discharge valve 11-6 and the second inspection valve 11-7 are arranged at the bottom of the outlet of the second weighing cylinder 11; the second impurity discharge valve 11-6 is normally closed and is opened when cleaning the second weighing cylinder 11; the first liquid outlet valve 10-5 and the second liquid outlet valve 11-5 do not work at the same time.

[0074] The first weighing cylinder 10 and the second weighing cylinder 11 are arranged side by side to alternately provide the spraying liquid to the mixer 1 .

[0075] The first weighing cylinder 10 and the second weighing cylinder 11 are set with a maximum weight m2 and a minimum weight m1 for controlling the liquid inlet. When the weight of the liquid in the first weighing cylinder 10 is lower than m1, the first liquid outlet valve 10-5 is closed and the second liquid outlet valve 11-5 is opened. The operation is switched from the first weighing cylinder 10 to the second weighing cylinder 11. The first liquid inlet valve 10-3 is opened (the second liquid inlet valve 11-3 is closed at this time), and the front end replenishes liquid to the first weighing cylinder 10. After the weight reaches m2, the first liquid inlet valve 10-3 is closed and the liquid replenishment is stopped. The first weighing cylinder 10 and the second weighing cylinder 11 work alternately in this way. The weight of each replenishment is fed back to the system by the second weighing sensor 1 10-1 or the second weighing sensor 2 11-1. The system counts the weight of the liquid replenished to the first weighing cylinder 10 or the second weighing cylinder 11 each time, and calculates the total consumption m of the liquid during the production cycle.

[0076] When the first liquid level gauge 10-2 or the second liquid level gauge 11-2 has a signal, the front end needs to stop feeding liquid immediately, and the corresponding first liquid inlet valve 10-3 or the second liquid inlet valve 11-3 is closed.

[0077] During production, the first stirring 10-4 and the second stirring 11-4 are in the open state, and when there is no liquid, the liquid stirring is closed.

[0078] The first exhaust valve 10-6, the second exhaust valve 11-6 and the third exhaust valve 12-5 are in a normally closed state. When cleaning the first weighing cylinder 10, the first exhaust valve 10-6 is opened and the first inspection valve 10-7 is closed; when cleaning the second weighing cylinder 11, the second exhaust valve 11-6 is opened and the second inspection valve 11-7 is closed; when cleaning the pipeline of the liquid pump group 12, the third exhaust valve 12-5 is opened.

[0079] The first inspection valve 10-7, the second inspection valve 11-7 and the third inspection valve 12-2 are in a normally open state. When inspecting the filter cartridge 12-1, the first inspection valve 10-7, the second inspection valve 11-7 and the third inspection valve 12-2 are closed; when inspecting the pump 12-3, the third inspection valve 12-2 is closed.

[0080] The valve 12-8 is in a normally closed state and is opened when the pipeline sprays liquid. The speed of the pump 12-3 can be automatically adjusted according to the size of the liquid addition ratio.

[0081] The nozzle pipelines of the liquid addition spray pipeline are symmetrically distributed on both sides of the mixer feed port, so that the liquid is sprayed on the surface of the falling dry material from both sides, and the atomized liquid has a larger contact surface with the dry material, and the spraying is uniform. Then, after the two rotors stir and mix, the liquid can be fully distributed in the material to achieve a good mixing effect and high mixing uniformity. During the liquid spraying and adding process, the system adjusts the opening number of the nozzle pipeline according to the pipeline pressure value fed back by the pressure sensor, so that the nozzle can achieve the ideal atomization effect. In addition, the air inlet interface is connected to compressed air, and the air pressure can be used to assist the atomization of the nozzle, especially for viscous liquids.

[0082] A pipeline cleaning device is installed on the liquid adding pipeline. After each production, the residual liquid in the pipeline is sprayed and cleaned. The residual liquid in the liquid adding spraying pipeline is all pressed into the mixer by compressed air to mix with the material to prevent the residual liquid in the pipeline from dripping into the mixer at the end of production and affecting the subsequent production. It can reduce the residue in the production process.

[0083] The outlets of the first weighing cylinder 10 and the second weighing cylinder 11 are gathered together and connected to the liquid pump group 12, and the other end of the liquid pump group 12 is connected to the liquid addition spraying pipeline 1-3 of the mixer 1; the liquid pump group 12 is composed of a filter cylinder 12-1, a third inspection valve 12-2, a pump 12-3, a safety valve 12-4, a third impurity discharge valve 12-5, a pressure sensor 12-6, a pressure gauge 12-7, a valve 12-8, and a cleaning valve 12-9.

[0084] On the pipeline of the liquid pump group 12, along the liquid flow direction, there are respectively arranged a filter cartridge 12-1, a third inspection valve 12-2, a pump 12-3, a safety valve 12-4, a third exhaust valve 12-5, a pressure sensor 12-6, a pressure gauge 12-7, a valve 12-8, and a cleaning valve 12-9.

[0085] The filter cartridge 12-1 is used to filter impurities in the liquid to prevent nozzle clogging; the speed of the pump 12-3 is adjustable; the safety valve 12-4 prevents excessive pipeline pressure from causing damage to the pump 12-3 and the pipeline, and automatically refluxes when the pressure is too high; the third impurity removal valve 12-5 is set at the low point of the liquid pump group 12 to facilitate cleaning of impurities in the pipeline; the pressure sensor 12-6 is used to sense the liquid pressure in the pipeline in real time and transmit it to the control system, and the pressure gauge 12-7 is used to observe the liquid pressure in the pipeline on site; the valve 12-8 is used to control the on-off of the pipeline at the outlet of the liquid pump group 12, and the valve 12-8 is closed when the cleaning valve 12-9 is working; the liquid pump group 12 opens the cleaning valve 12-9 after each spraying is completed, and uses compressed air to press all the residual liquid in the liquid addition spray pipeline 1-3 into the mixer 1 to mix with the material.

[0086] In one embodiment, the front-end incoming material can be a single raw material or a mixture of several raw materials. Multiple incoming material components can be set according to the type of production formula.

[0087] In one embodiment, if the production formula is single, only one incoming material component needs to be set. The advantage of setting multiple incoming material components is that when the formula is switched, the next formula can enter the silo and be prepared on the weight loss scale while the current formula is still in production, without waiting.

[0088] In one embodiment, if the production formula requires materials in different silos to be proportioned, multiple silos are set up according to production needs, and the discharge flow of each silo is fed back to the control system by the first weighing sensor corresponding to the silo, and the control system automatically adjusts the speed of the feeder according to the proportion.

[0089] In one embodiment, the silos of multiple incoming material components share a weight loss scale. At this time, when the same materials are stored in the silos, the discharge of each silo can be switched freely. When different materials are stored in the silos, only after the production of the current material is completely completed, can other silos be switched to produce the next formula.

[0090] As another embodiment of the present invention, when liquid spraying is performed on only one raw material or one mixture, only one incoming material assembly 100 is needed. According to actual production conditions, the process flow can be flexibly arranged. The present invention can set one incoming material assembly for liquid spraying of a single raw material or a single mixture.

[0091] As another embodiment of the present invention, liquid spraying is performed on three or more raw materials or three mixed materials by setting a corresponding number of incoming material components. According to actual production conditions, the process flow is flexibly arranged, and the present invention can also set multiple incoming material components for the proportioning and liquid spraying of different materials.

[0092] As another embodiment of the present invention, when there is no requirement for liquid spraying and adding, it can also be used for proportioning and mixing multiple groups of raw materials, and in this case, it is used as a continuous dry material mixer.

[0093] As another embodiment of the present invention, multiple silos can share one weight loss scale. In this case, when the same materials are stored in the silos, the discharge of each silo can be switched freely. When different materials are stored in the silos, only after the production of the current material is completely completed, can other silos be switched to produce the next formula.

[0094] Example 3 The material adding and mixing device works as follows: Preparation before production: Set the production parameters corresponding to the formula: Set the maximum weight M2 and minimum weight M1 of the first weight loss scale 4 and the second weight loss scale 4a for feeding control, set the maximum weight m2 and minimum weight m1 of the first weighing cylinder 10 and the second weighing cylinder 11 for liquid feeding control, set the first weight loss scale 4 and the second weight loss scale 4a for material discharge target flow Q1 and Q2 according to the formula ratio requirements, and the first weighing cylinder 10 and the second weighing cylinder 11 for spraying liquid target flow q. Liquid addition ratio n% (relative to dry matter), n%=q / (Q1+Q2)×100%.

[0095] The first feeder 3 and the second feeder 3a are started, and the first feeder 3 and the second feeder 3a feed materials to the first weight loss scale 4 and the second weight loss scale 4a respectively. After the weight M2 is reached, the first feeder 3 and the second feeder 3a stop feeding materials; Open the first stirring 10-4 and the second stirring 11-4, open the first liquid inlet valve 10-3, add liquid to the first weighing cylinder 10, close the first liquid inlet valve 10-3 after the weight reaches m2, then open the second liquid inlet valve 11-3, add liquid to the second weighing cylinder 11, and close the second liquid inlet valve 11-3 after the weight reaches m2.

[0096] During production: like Figure 1-5 , start the mixer 1, the first feeder 4-2, and the second feeder 4-2a, open the first liquid outlet valve 10-5 of the first weighing cylinder 10, and the first feeder 4-2 and the second feeder 4-2a respectively adjust the feeding speed according to the set target flow rates Q1 and Q2 and the weight change values ​​of the first weighing sensor 1 4-1 and the first weighing sensor 2 4-1a, so that the actual flow in the control system reaches the set target flow rates Q1 and Q2; at the same time, open the nozzle pipeline 1-33, the first liquid outlet valve 10-5, the valve 12-8, and the pump 12-3, and the control system adjusts the speed of the pump 12-3 according to the set spraying liquid target flow rate q and the weight change value of the second weighing sensor 10-1, so that the actual flow in the control system reaches the set coating liquid target flow rate q. This time generally does not exceed 10 seconds, which is called the head material stage. During this process, the discharge tee 7 is connected to the fourth silo 9, and the head material enters the fourth silo 9. When the actual flow rates of the first weight-loss scale 4, the second weight-loss scale 4a and the first weighing cylinder 10 all reach the target flow rates, the discharge tee 7 is switched to the third silo 8, and normal production begins.

[0097] During the production process, if the weight value of the first weight-reducing scale 4 becomes M1, the first feeder 3 is started to feed the first weight-reducing scale 4 until the weight reaches M2. During the feeding process, the speed of the first feeder 4-2 remains unchanged. If the weight value of the second weight-reducing scale 4a becomes M1, the second feeder 3a is started to feed the second weight-reducing scale 4a until the weight reaches M2. During the feeding process, the speed of the second feeder 4-2a remains unchanged. If the weight of the first weighing cylinder 10 is reduced to m1, the first liquid outlet valve 10-5 is closed, the second liquid outlet valve 11-5 is opened, and the second weighing cylinder 11 is switched to, and then the first liquid inlet valve 10-3 is opened to add liquid to the first weighing cylinder 10 until the weight reaches m2, and the first liquid inlet valve 10-3 is closed. If the weight of the second weighing cylinder 11 is reduced to m1, the second liquid outlet valve 11-5 is closed, the first liquid outlet valve 10-5 is opened, the first weighing cylinder 10 is switched, and then the second liquid inlet valve 11-3 is opened to add liquid to the second weighing cylinder 11 until the weight reaches m2, and the second liquid inlet valve 11-3 is closed. The first weighing cylinder 10 and the second weighing cylinder 11 work in this cycle. When there is no signal at the first low material level 2-2 of the first silo 2, the front end refills the first silo 2 until there is a signal at the first high material level 2-1, and then the refilling stops. When there is no signal at the second low material level 2-2a of the second silo 2a, the front end refills the second silo 2a until there is a signal at the second high material level 2-1a, and then the refilling stops.

[0098] The dry materials from the first weight loss scale 4 and the second weight loss scale 4a are transported to the collecting bucket 5 through the first feeder 4-2 and the second feeder 4-2a, and meet the liquid sprayed by the first weighing cylinder 10 or the second weighing cylinder 11 through the liquid pump group 12 at the feed port 1-11 of the mixer 1. Specifically, Figure 5 The main line of the liquid adding spraying pipeline 1-3 is symmetrically divided into a branch line 1-31 and a branch line 2 1-32, and each branch line is further divided into a plurality of nozzle lines 1-33. At least one nozzle line 1-33 is opened at the same position of the nozzles of the branch lines 1-31 and the branch lines 2 1-32 on both sides, so that the liquid is sprayed on the surface of the falling dry material from both sides, and then stirred and mixed by the first rotor 1-2a and the second rotor 1-2b, and discharged through the discharge port 1-12. The first rotor 1-2a and the second rotor 1-2 are turned as shown in FIG. Figure 3 , the blades 1-22a of the two rotors are adjustable in angle, such as Figure 4 The continuous double-rotor blade stirring and conveying structure is adopted, and the material flows and diffuses in the axial and radial directions, and the convection and shear are enhanced, with high mixing efficiency, good uniformity and low energy consumption.

[0099] During the liquid spraying and adding process, the system adjusts the opening quantity of the nozzle pipelines 1-33 on branch line 1-31 and branch line 2 1-32 according to the pipeline pressure value fed back by the pressure sensor 12-6, so that the nozzles can achieve the ideal atomization effect. In addition, the air inlet interface 1-33c passes compressed air, and the air pressure can be used to assist the atomization of the nozzle, especially for viscous liquids.

[0100] The control system continuously accumulates and counts the weight M of the material in the production process of the first weight-reducing scale 4, the weight Ma of the second weight-reducing scale 4a, the weight m of the liquid used by the first weighing cylinder 10 and the second weighing cylinder 11, and calculates the actual liquid addition ratio m / (M+Ma)×100%, compares it with the theoretical liquid addition ratio n%, and corrects the pump flow rate to control the actual liquid addition ratio within the allowable error range.

[0101] The present invention is suitable for liquid addition, mixing and breaking of one or more powdered materials, and one or more different liquids can be sprayed onto the product mixture. Both dry materials and liquids are measured by scales, which are highly accurate and convenient for inventory. The control system continuously accumulates and counts the weight of dry materials and liquids, compares them with the theoretical liquid addition ratio in real time, and corrects the pump flow rate so that the actual liquid addition ratio is controlled within the allowable error range.

[0102] After production: Case 1: Temporary shutdown due to production suspension: The system enters the shutdown phase, stops the first feeder 4-2 and the second feeder 4-2a; stops the pump 12-3; closes the liquid outlet valve of the current weighing cylinder (the first liquid outlet valve 10-5 or the second liquid outlet valve 11-5); closes valve 12-8; closes the nozzle pipeline 1-33; switches the discharge tee 7 to the fourth silo 9, discharges the tail material to the fourth silo 9, and delays the shutdown of the mixer 1.

[0103] Case 2: The production plan requirement is met, that is, the raw materials prepared at the front end have been produced: when there is no signal from the first low material level 2-2 and the second low material level 2-2a, and there is no raw material replenishment at the front end, the system enters the shutdown stage. The system calculates the amount of liquid required based on the remaining material weight of the first weight-reducing scale 4 and the second weight-reducing scale 4a, and compares it with the total weight of the liquid remaining in the first weighing cylinder 10 and the second weighing cylinder 11. If the total weight of the liquid remaining in the first weighing cylinder 10 and the second weighing cylinder 11 is insufficient, only the corresponding difference needs to be supplemented. The last batch no longer follows the replenishment of liquid to the weight of m2. If the total weight of the liquid in the first weighing cylinder 10 and the second weighing cylinder 11 exceeds the liquid dosage, the first weighing cylinder 10 and the second weighing cylinder 11 stop replenishing liquid. When the weight of the materials in the first weight-reducing scale 4 and the second weight-reducing scale 4a is zero, stop the first feeder 4-2 and the second feeder 4-2a; stop the pump 12-3; close the liquid outlet valve (the first liquid outlet valve 10-5 or the second liquid outlet valve 11-5) of the current weighing cylinder, close the first stirring 10-4 and the second stirring 11-4; close the valve 12-8; open the cleaning valve 12-9; switch the discharge tee 7 to the fourth silo 9, and discharge the tail material to the fourth silo 9; then, start the elevator 6, the elevator 6 lifts the head material and tail material stored in the fourth silo 9 to the outlet and enters the collecting bucket 5, and then enters the fourth silo 9 after being mixed again by the mixer 1. This process is to mix the head material and tail material generated during production again to improve the mixing uniformity, and use these materials to wash the mixer 1, reduce the liquid and material residue in the mixer 1, and improve the utilization rate of raw materials. After 2-3 cycles, the discharge tee 7 is switched to the third silo 8, and the final mixed material is discharged into the third silo 8, until the material in the fourth silo 9 finally enters the third silo 8 through the elevator 6, the collecting bucket 5, the mixer 1, and the feed tee 7. Finally, the elevator 6 is turned off; the nozzle pipeline 1-33 is turned off; the mixer 1 is turned off, and the feed tee 7 is switched to the fourth silo 9.

[0104] The invention can fully utilize the head material and the tail material of the machine, and does not need to add additional machine washing materials, thereby avoiding the waste of raw materials and having a high degree of automation; it does not need to manually clean the head material and the tail material of the machine, thereby reducing the labor intensity of workers.

[0105] The invention has high mixing efficiency, small installation space, low residue, easy cleaning, high automation degree and accurate liquid and material ratio.

[0106] The above-mentioned implementation modes are only for illustrating the technical features and concepts of the present invention, and their purpose is to enable technicians familiar with this technology in the field to understand the contents of the present invention and implement them. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and implementation modes of the present invention should be included in the protection scope of the present invention.

Claims

1. A material adding and mixing method, characterized in that: The method comprises the following steps: According to the material formula ratio requirements and the weight of the material to be mixed, calculate the weight of the liquid required for spraying the mixed material; The material is transported to the feed port of the mixer. At the same time, the liquid is transported to the feed port of the mixer through the pump group and sprayed on the surface of the falling material to be mixed; The material to be mixed and the liquid are fully mixed, stirred, and dispersed in the mixer, and then discharged.

2. The material adding and mixing method according to claim 1, characterized in that: The method further comprises: The speed of the pump group can be adjusted according to the proportion of liquid added; The weight of the material entering the mixer is obtained in real time by using the first weighing sensor; The second weighing sensor is used to obtain the pumping volume of the liquid in real time; the actual liquid addition ratio is compared with the theoretical liquid addition ratio. According to the difference between the two, the speed of the pump group is adjusted to control the actual liquid addition ratio within the allowable error range.

3. The material adding and mixing method according to claim 1, characterized in that: The method also includes a material conveying method, using at least two sets of material feeding mechanisms to alternately convey materials to the mixer to ensure the continuity of material conveying; The first weighing sensor of each group of material feeding mechanism is used to obtain the discharge flow rate of each group of material feeding mechanism, and the feeding speed is adjusted according to the material formula ratio requirements, thereby adjusting the feeding amount entering the mixer.

4. The material adding and mixing method according to claim 1, characterized in that: The method also includes a liquid delivery method, using at least two groups of liquid adding mechanisms to alternately provide sprayed liquid to the mixer to ensure the continuity of liquid delivery; During the liquid spraying and adding process, the liquid is sprayed onto the falling material surface from both sides of the feed port; compressed air is passed through the spray nozzle, and the compressed air pressure is used to assist the atomization of the nozzle; according to the pressure value of the pump group's outlet pipeline and the liquid addition ratio, the number of spray nozzles opened is controlled to control the spraying amount.

5. The material adding and mixing method according to claim 1, characterized in that: The method also includes a discharge control method: When the mixer just starts working, collect the head material; When the mixer works normally, discharge the material; When the mixer enters the temporary shutdown stage, stop material transportation, stop liquid transportation and spraying, and collect the machine tailings; When the mixer enters the shutdown stage, stop material transportation, stop liquid transportation and spraying, and collect the tail material; transport the collected head material and tail material to the mixer, mix them again, and use the head material and tail material to wash the mixer, repeat N times, and discharge the material.

6. A material adding and mixing device for implementing the material adding and mixing method according to any one of claims 1 to 5, characterized in that: include: The material-incoming mechanism comprises a plurality of material-incoming components arranged in parallel; The liquid adding mechanism comprises a plurality of liquid adding components arranged in parallel; the discharge ends of the liquid adding components are respectively connected to the pump groups; The mixing mechanism comprises a collecting hopper and a mixer connected to each other; the collecting hopper is used to receive the materials delivered by the material incoming mechanism; the feed port of the mixer is connected to the discharge port of the collecting hopper, a liquid adding spraying pipeline is arranged on the feed port of the mixer, and the liquid adding spraying pipeline is connected to the pump group.

7. The material adding and mixing device according to claim 6, characterized in that: The mixer is provided with a discharging tee at the discharging port, and two outlets are provided on the discharging tee, and the two outlets are respectively connected with a discharging bin and a temporary storage bin, and a high material level and a low material level are respectively provided on the discharging bin and the temporary storage bin; The discharge bin is used to temporarily store the normal production discharge; The temporary storage bin is used for temporarily storing the head material and tail material of the mixer; the temporary storage bin is connected to the feed port of the collecting bucket via an elevator.

8. The material adding and mixing device according to claim 7, characterized in that: The incoming material assembly includes a silo, a feeder, a weight loss scale, and a feeder connected in sequence; The silo is provided with a high material level and a low material level; The weight loss scale is provided with a first weighing sensor; The rotation speed of the feeder is adjustable.

9. The material adding and mixing device according to claim 8, characterized in that: The liquid adding component comprises: A weighing cylinder, on which a liquid inlet pipeline, a liquid level meter, a second weighing sensor, and a liquid outlet pipeline are arranged; a liquid inlet valve is arranged on the liquid inlet pipeline; a liquid outlet valve and a maintenance valve are arranged on the liquid outlet pipeline; a debris discharge pipeline is arranged on the liquid outlet pipeline, and a debris discharge valve is arranged on the debris discharge pipeline; The stirring assembly is arranged in the weighing cylinder.

10. The material adding and mixing device according to claim 9, characterized in that: The pump unit comprises: An infusion pipeline, a filter cartridge, an inspection valve, a pump, a safety valve, a pressure sensor, a pressure gauge, and a valve arranged in sequence along the liquid flow direction on the infusion pipeline; A cleaning pipeline is arranged at the discharge end of the infusion pipeline, and a cleaning valve is arranged on the cleaning pipeline; A waste discharge pipeline is arranged at the feed end of the infusion pipeline, and a waste discharge valve is arranged on the waste discharge pipeline; The rotation speed of the pump on the infusion pipeline is adjustable.

11. The material adding and mixing device according to claim 10, characterized in that: The liquid adding spraying pipeline comprises: A main pipeline is connected to the liquid outlet of the pump group, and a branch pipeline is arranged in parallel on the main pipeline; The spray pipeline is obliquely arranged on the corresponding branch pipeline. A nozzle and a control valve are arranged on the spray pipeline. The nozzle includes a liquid inlet, an air inlet and an outlet. The air inlet is used to connect compressed air. The control valve is used to control the on-off of the spray pipeline.

12. The material adding and mixing device according to claim 11, characterized in that: The nozzle is a Y-shaped structure, the liquid inlet and the outlet are in a straight line, and the air inlet is arranged obliquely relative to the liquid inlet; The outlet of the nozzle is circular or straight; The main pipeline, branch pipeline and spray pipeline are all located outside the feed port of the mixer, the nozzle is installed obliquely on the side wall of the feed port, and the outlet of the nozzle is located inside the feed port; the control valve and the air inlet of the nozzle are located outside the discharge port.

13. The material adding and mixing device according to claim 12, characterized in that: The mixing mechanism comprises: A mixing chamber, wherein the mixing chamber comprises a first mixing chamber and a second mixing chamber which are arranged crosswise and overlapped, and the feed port is arranged at the crosswise and overlapping position of the first mixing chamber and the second mixing chamber; The rotor assembly includes a first rotor and a second rotor arranged side by side; the first rotor is arranged in the first mixing chamber; the second rotor is arranged in the second mixing chamber, and the first rotor and the second rotor are arranged crosswise; the first rotor and the second rotor are arranged in opposite directions.

14. The material adding and mixing device according to claim 13, characterized in that: A plurality of the incoming material components share a weight loss scale; The number of the incoming material components is 2; The number of the liquid adding components is 2, including a first liquid adding component and a second liquid adding component arranged in parallel; the first liquid adding component and the second liquid adding component are used to alternately provide the spraying liquid to the mixer; The first liquid adding component comprises a first weighing cylinder, on which a first liquid inlet pipeline, a first liquid level meter, a second weighing sensor 1, and a first liquid outlet pipeline are arranged; a first liquid inlet valve is arranged on the first liquid inlet pipeline; a first liquid outlet valve and a first inspection valve are arranged on the first liquid outlet pipeline; a first impurity discharge pipeline is arranged on the first liquid outlet pipeline, and a first impurity discharge valve is arranged on the first impurity discharge pipeline; a first stirring component is arranged in the first weighing cylinder; The second liquid adding component includes a second weighing cylinder, on which a second liquid inlet pipeline, a second liquid level meter, a second weighing sensor 2, and a second liquid outlet pipeline are arranged; a second liquid inlet valve is arranged on the second liquid inlet pipeline; a second liquid outlet valve and a second inspection valve are arranged on the second liquid outlet pipeline; a second impurity discharge pipeline is arranged on the second liquid outlet pipeline, and a second impurity discharge valve is arranged on the second impurity discharge pipeline; and a second stirring component is arranged in the second weighing cylinder.

15. The control method of the material adding and mixing device according to claim 14, characterized in that: The control method comprises: Set the production parameters corresponding to the recipe: set the maximum weight M2 and minimum weight M1 of the weight loss scale for feeding control, set the maximum weight m2 and minimum weight m1 of the weighing cylinder for liquid inlet control, and set the target flow rate Q of the weight loss scale according to the recipe ratio requirements. i , the target flow rate of the weighing cylinder spraying liquid is q; the liquid addition ratio is n%, n%=q / (∑Q i )×100%; Start the feeder, and feed the material to the weight loss scale. When the weight reaches M2, the feeder stops feeding; Start stirring in the weighing cylinder, open the liquid inlet valve, add liquid to the weighing cylinder, and close the liquid inlet valve after the weight reaches m2; During production: Start the mixer and feeder, open the outlet valve of the weighing cylinder, and the feeder will flow according to the set target flow rate Q. i and the weight change value of the first weighing sensor, adjust the feeding speed so that the actual flow rate reaches the set target flow rates Q1 and Q2; At the same time, open the nozzle pipeline, liquid outlet valve, valve, and pump, and adjust the speed of the pump according to the set spray liquid target flow q and the weight change value of the second weighing sensor, so that the actual flow reaches the set spray liquid target flow q, and the time is ≤10 seconds. At this time, it is the head material stage of just starting the machine, and the discharge tee is connected to the temporary storage bin, and the head material enters the temporary storage bin; When the actual flow rates of the weight loss scale and weighing cylinder reach the target flow rates, the discharge tee is switched to the discharge bin and normal production begins; During the production process, if the weight value of the weight loss scale becomes M1, the feeder is started to add material to the weight loss scale until the weight reaches M2. During the feeding process, the feeder speed remains unchanged; The material on the weight loss scale is transported to the collecting hopper through the feeder, and meets the liquid sprayed by the weighing cylinder through the liquid pump group at the feed port of the mixer. The liquid is sprayed on the surface of the falling dry material from both sides of the feed port. The compressed air is passed through the air inlet of the nozzle, and the air pressure is used to assist the atomization of the nozzle, and then stirred and mixed, and discharged through the discharge port; During the liquid spraying and adding process, the number of nozzle openings of the nozzle pipelines of the two branch pipelines is adjusted according to the pipeline pressure value fed back by the pressure sensor; Obtain the weight M of the material in the real-time weight loss production process and the weight m of the liquid used in the weighing cylinder, calculate the actual liquid addition ratio m / M×100%, compare it with the theoretical liquid addition ratio n%, and adjust the pump flow rate to control the actual liquid addition ratio within the allowable error range.

16. The control method according to claim 15, characterized in that: The control method further comprises: If the weight of the first weighing cylinder is reduced to m1, the first liquid outlet valve is closed, the second liquid outlet valve is opened, the second weighing cylinder is switched, and then the first liquid inlet valve is opened to add liquid to the first weighing cylinder until the weight reaches m2, and the first liquid inlet valve is closed; If the weight of the second weighing cylinder is reduced to m1, the second liquid outlet valve is closed, the first liquid outlet valve is opened, the first weighing cylinder is switched, and then the second liquid inlet valve is opened to add liquid to the second weighing cylinder until the weight reaches m2, and the second liquid inlet valve is closed. The first weighing cylinder and the second weighing cylinder work in this cycle; The liquid level meter is used to detect the liquid level in the weighing cylinder. When the liquid level meter sends a signal, the weighing cylinder stops feeding liquid. When there is no signal of the low material level of the silo of the incoming material component, the front end will refill the silo until there is a signal of the high material level of the silo of the incoming material component, and then stop refilling; When there is a signal of the high material level of the discharge bin, the discharge bin is full and the discharge bin needs to speed up the material discharge. If there is still a signal after the set time, the three-way switch needs to be switched to the temporary storage bin; if there is also a signal of the high material level of the temporary storage bin, the upstream needs to be shut down; When there is no signal at the low material level of the discharge bin, it means that the discharge bin is short of material or is empty, and the upstream can feed normally; When there is a signal for the high material level of the temporary storage bin, the temporary storage bin is full and no more material can be fed into the bin; when there is no signal for the low material level of the temporary storage bin, it means that the temporary storage bin is short of material or is empty, and material can be fed from the upstream.

17. The control method according to claim 15, characterized in that: The control method further comprises: Temporary shutdown for production suspension: the material adding and mixing device enters the shutdown stage, stops the feeder; stops the pump; closes the liquid outlet valve of the current weighing cylinder; closes the valve of the pump group; closes the spray pipeline; switches the discharge tee to the temporary storage silo, discharges the tail material to the temporary storage silo, and delays the shutdown of the mixer.

18. The control method according to claim 15, characterized in that: The control method further comprises: Production is about to end: the production plan requirement is reached, that is, the raw materials prepared at the front end have been produced: when the low material level of the first weight loss scale and the low material level of the second weight loss scale have no signal, and there is no raw material replenishment at the front end, it enters the shutdown stage, and the required liquid dosage is calculated according to the remaining material weight of the first weight loss scale and the second weight loss scale, and compared with the total weight of the remaining liquid in the first weighing cylinder and the second weighing cylinder; If the total weight of the liquid remaining in the first weighing cylinder and the second weighing cylinder is insufficient, the corresponding difference is supplemented; If the total weight of the liquid in the first weighing cylinder and the second weighing cylinder exceeds the liquid usage, the first weighing cylinder and the second weighing cylinder stop replenishing the liquid; When the weight of the material on the first and second weight-loss scales is zero, stop the feeder; stop the pump; close the liquid outlet valve of the current weighing cylinder, close the first and second stirring; close the valve; open the cleaning valve; switch the discharge tee to the temporary storage bin, and discharge the tail material to the temporary storage bin; Then, the elevator is started, and the head material and tail material stored in the temporary storage bin are lifted to the outlet by the elevator and enter the collection bucket, and then mixed again by the mixer and enter the temporary storage bin, and the cycle is repeated 2-3 times; Then, the discharge tee is switched to the discharge bin, and the final mixed material is discharged into the discharge bin, until the material in the temporary storage bin finally enters the discharge bin through the elevator, the collecting bucket, the mixer, and the feed tee; Finally, turn off the elevator; turn off the nozzle pipeline; turn off the mixer, and switch the feed tee to the temporary storage silo.

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