Weighing module of feeding device with sensor weighing structure

Abstract

The invention discloses a weighing module of a feeding device with a sensor weighing structure, and relates to the technical field of conveying, the weighing module comprises a support, a first conveying module, a second conveying module, the weighing module and a screening module are installed on the support in a matched mode, and the weighing module and the screening module are located between the first conveying module and the second conveying module. The screening module is located above the weighing module and comprises a screening bin, the screening bin is obliquely arranged, a collecting tank is cooperatively installed on the upper side of the screening bin, a first screening net and a second screening net are cooperatively installed in the screening bin, and the inner space of the screening bin is divided into three layers of channels by the first screening net and the second screening net; three discharging augers are installed at the lower end of the screening bin in a matched mode. The weighing module is independently arranged, interference of other pipelines is avoided, the weighing result is more accurate, the feeding operation of specific weight can be carried out, and the weight of materials fed at a time is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying, and specifically to a weighing module of a feeding device with a sensor weighing structure. Background Art

[0002] Feeding devices are generally common machinery in industrial production, and they generally complete the feeding function directly through a conveyor belt; materials are directly fed into the production end (reaction kettles in the chemical industry, furnaces in the smelting industry, etc.) through the conveyor belt for production.

[0003] Currently, mainstream feeding devices generally adopt the continuous feeding method of conveyor belts, and this process has two significant technical bottlenecks. First, in terms of weighing control, due to the speed fluctuations and accumulation effects of materials during transmission, it is difficult to accurately measure the weight of a single feed; second, in the design of the weighing system, existing devices mostly adopt an integrated structure of belt scales, and the weighing sensors are directly installed on the conveyor belt support frame. This architecture design makes the weighing unit inevitably affected by mechanical vibration coupling interference, and at the same time, the change in conveyor belt tension will generate a dynamic additional force of 0.3 - 1.2 kN, which will result in a weighing deviation of at least 2.5%, seriously affecting the accuracy of batch feeding. Summary of the Invention

[0004] To solve the problems of inaccurate weighing and inaccurate feeding weight proposed in the above background art, the purpose of the present invention is to provide a weighing module of a feeding device with a sensor weighing structure.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A weighing module of a feeding device with a sensor weighing structure, including a bracket, on which a first conveying module, a second conveying module, a weighing module, and a screening module are cooperatively installed; The weighing module and the screening module are located between the first conveying module and the second conveying module, and the screening module is located above the weighing module; The screening module includes a screening bin, the screening bin is inclined, and a collection trough is cooperatively installed on the upper side of the screening bin; A first screening mesh and a second screening mesh are cooperatively installed in the screening bin, the first screening mesh is located above the second screening mesh, the mesh number of the first screening mesh is smaller than that of the second screening mesh, the internal space of the screening bin is divided into three-layer channels by the first screening mesh and the second screening mesh, and a first discharge auger, a second discharge auger, and a third discharge auger are cooperatively installed at the lower end of the screening bin, and the first discharge auger, the second discharge auger, and the third discharge auger are respectively communicated with the one-layer channels; Discharge ports are respectively arranged at both ends of the first discharge auger, the second discharge auger, and the third discharge auger, and one discharge port of each discharge auger is correspondingly arranged with the weighing module, and the other discharge port is located outside the bracket.

[0006] Preferably, the first conveying module includes a first mounting frame, on which a first driving roller and a first driven roller are mounted. A first conveyor belt is cooperatively mounted on the first driving roller and the first driven roller, and a plurality of grooves are formed in the first conveyor belt.

[0007] Preferably, the second conveying module includes a second mounting frame, on which a second driving roller, a plurality of second driven rollers and a plurality of supporting rollers are mounted. A second conveyor belt is cooperatively mounted on the second driving roller, the plurality of second driven rollers and the plurality of supporting rollers, and a plurality of partition plates are cooperatively mounted on the second conveyor belt. Two oppositely arranged elastic bands are cooperatively mounted between two adjacent partition plates.

[0008] Preferably, the weighing module includes a weighing hopper, a first support frame and two symmetrically arranged second support frames. A third support frame is cooperatively mounted on one side of the second support frame, a first sensor mounting plate is provided on the third support frame, a second sensor mounting plate is provided on the weighing hopper, the first sensor mounting plate and the second sensor mounting plate are arranged in one-to-one correspondence, and a weighing sensor is cooperatively mounted between the corresponding first sensor mounting plate and the second sensor mounting plate.

[0009] Preferably, a rotating shaft is mounted in the weighing hopper, a blocking plate is rotatably mounted on the rotating shaft, a support plate is fixedly mounted on one side of the blocking plate, an elastic plate is cooperatively mounted between one end of the support plate and the weighing hopper, a plurality of windows are formed in the weighing hopper, and a plurality of counterweight balls are cooperatively mounted at one end of the blocking plate.

[0010] Preferably, a plurality of pulse gas spray nozzles are cooperatively mounted on the first support frame, the pulse gas spray nozzles and the windows are arranged in one-to-one correspondence, and the pulse gas spray nozzles are mounted towards the side of the blocking plate where the counterweight balls are located.

[0011] Preferably, a plurality of electromagnets are cooperatively mounted on the first support frame, the electromagnets and the windows are arranged in one-to-one correspondence, a plurality of magnets are provided on the blocking plate, the magnets and the electromagnets are arranged in one-to-one correspondence, and the electromagnets and the magnets repel each other.

[0012] Preferably, a fourth support frame is cooperatively mounted on the support, the support and the screening bin are connected through the fourth support frame, and a vibration motor is cooperatively mounted on one side of the collection tank.

[0013] Preferably, a first channel is above the first screening net, a second channel is between the first screening net and the second screening net, a third channel is below the second screening net, the first channel is communicated with the first discharge auger, the second channel is communicated with the second discharge auger, the third channel is communicated with the first discharge auger, and servo motors are cooperatively mounted at one ends of the first discharge auger, the second discharge auger and the third discharge auger.

[0014] Preferably, the two ends of the first discharge auger, the second discharge auger and the third discharge auger are respectively provided with a first discharge port, a second discharge port and a third discharge port. One of the first discharge port, the second discharge port and the third discharge port is located above the weighing module, and the other first discharge port, second discharge port and third discharge port are located outside the bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts a non-contact weighing structure. First, at the mechanical structure level, the weighing module adopts a fully suspended sensor support system, and a statically determinate support structure is formed by four groups of weighing sensors, completely eliminating the parasitic force interference of ±0.2 - 0.5N caused by traditional pipeline conduction. Secondly, in the discharging actuator, the pulse pneumatic control blocking plate is used to block the weighing hopper (or controlled by magnets and electromagnets with the same polarity repelling each other), so that the material falls into the second conveying module below, and finally a high weighing accuracy is achieved, which is greatly improved compared with the traditional conveyor belt weighing system.

[0016] When the material enters the screening module through the first conveying module, the material can be classified according to the particle size by the first screening net and the second screening net in the screening module. The weights of materials with different particle sizes are also different. When it is necessary to control the weight of each feeding, first control the third discharge auger to run, and put the larger particle size material into the weighing module. When the material in the weighing module reaches 70% - 80% of the predetermined weight of a single feeding, the third discharge auger stops running. Then control the second discharge auger to run, and put the medium particle size material into the weighing module. When the material in the weighing module reaches 90% - 95% of the predetermined weight of a single feeding, the second discharge auger stops running. Finally, control the first discharge auger to run, and put the smaller particle size material into the weighing module until the material in the weighing module reaches the predetermined weight of a single feeding. This solution effectively solves the overshoot problem in the mixing process of multi-component materials by combining particle size classification and flow step control, and significantly improves the adaptability of the system to complex production processes. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the basic structure of the weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0018] Figure 2 It is a Figure 1 front view of the weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0019] Figure 3 It is a Figure 1 top view of the weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0020] Figure 4 The A-A cross-sectional view of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 3 .

[0021] Figure 5 The schematic diagram of the passing of materials between modules of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0022] Figure 6 The basic structural schematic diagram of the screening module of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0023] Figure 7 The schematic diagram of the positional relationship between the screening module and the weighing module of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0024] Figure 8 Another perspective view of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 7 .

[0025] Figure 9 The enlarged view of part A of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 8 .

[0026] Figure 10 The internal structural schematic diagram of the screening module and the weighing module of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0027] Figure 11 The basic structural schematic diagram of the first conveying module of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0028] Figure 12 The basic structural schematic diagram of the second conveying module of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0029] Figure 13 The basic structural schematic of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 1 .

[0030] Figure 14 The basic structural schematic of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 2 .

[0031] Figure 15 The internal structural schematic diagram of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 1 .

[0032] Figure 16 Internal structure schematic diagram of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 2 。

[0033] Figure 17 Internal structure schematic diagram of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 3 。

[0034] Figure 18 Position schematic diagram of the current conveyor belt weighing structure

[0035] Figure 19 Internal structure schematic of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 4 。

[0036] Figure 20 Internal structure schematic of the weighing module of a feeding device with a sensor weighing structure according to the present invention Figure 5 。

[0037] Figure 21 Flow chart of the third embodiment of the weighing module of a feeding device with a sensor weighing structure according to the present invention

[0038] In the figure: 100, First conveying module; 101, First mounting frame; 102, First driving roller; 103, First driven roller; 104, First conveyor belt; 105, Groove 200, Second conveying module; 201, Second mounting frame; 202, Second driving roller; 203, Second driven roller; 204, Second conveyor belt; 205, Partition board; 206, Elastic belt; 207, Support roller 300, Weighing module; 301, Weighing hopper; 303, Sealing plate; 304, Rotating shaft; 305, First support frame; 306, Window; 307, Electromagnet; 308, Magnet; 309, Counterweight ball; 310, Support plate; 311, Second support frame; 312, Third support frame; 313, First sensor mounting plate; 314, Second sensor mounting plate; 315, Weighing sensor; 316, Elastic plate; 317, Pulse gas spray head; 318, Guide plate 400. Screening module; 401. Screening bin; 402. Collection trough; 4031. First discharge auger; 4032. Second discharge auger; 4033. Third discharge auger; 404. Servo motor; 4051. First discharge port; 4052. Second discharge port; 4053. Third discharge port; 406. Fourth support frame; 4071. First screening mesh; 4072. Second screening mesh; 4081. First channel; 4082. Second channel; 4083. Third channel; 409. Vibration motor 500. Bracket Detailed implementation manner

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0040] As Figures 1 - 15 shown, the weighing module of a feeding device with a sensor weighing structure provided in this embodiment includes a bracket 500, and a first conveying module 100, a second conveying module 200, a weighing module 300 and a screening module 400 are cooperatively installed on the bracket 500

[0041] The weighing module 300 and the screening module 400 are located between the first conveying module 100 and the second conveying module 200, and the screening module 400 is located above the weighing module 300

[0042] The first conveying module 100 includes a first mounting frame 101 (as Figure 11 shown), a first driving roller 102 and a first driven roller 103 are installed on the first mounting frame 101, a first conveyor belt 104 is cooperatively installed on the first driving roller 102 and the first driven roller 103, and a plurality of grooves 105 are formed in the first conveyor belt 104

[0043] In this embodiment, the first conveying module 100 is horizontally placed, and the grooves 105 on the first conveyor belt 104 can increase the friction between the material to be conveyed and the first conveyor belt 104, and can also effectively prevent small granular materials from falling off the first conveyor belt 104

[0044] The second conveying module 200 includes a second mounting frame 201 (as Figure 12As shown, a second driving roller 202, several second driven rollers 203 and several supporting rollers 207 are installed on the second mounting bracket 201. A second conveyor belt 204 is cooperatively installed on the second driving roller 202, several second driven rollers 203 and several supporting rollers 207. During installation, the second conveyor belt 204 is sleeved and installed on the second driving roller 202 and several second driven rollers 203, and the second conveyor belt 204 is limited and shaped by the supporting rollers 207. Several partition plates 205 are cooperatively installed on the second conveyor belt 204, and two oppositely arranged elastic bands 206 are cooperatively installed between two adjacent partition plates 205.

[0045] Both the first driving roller 102 and the second driving roller 202 are driven by corresponding stepping motors. Driving by stepping motors is a conventional prior art in the art and is not shown in the figure.

[0046] In this embodiment, the second conveying module 200 is in a "Z" shape. The lower end of the second conveying module 200 is located below the first conveying module 100, and the higher end of the second conveying module 200 is flush with the first conveying module 100. The partition plates 205 are arranged perpendicular to the second conveyor belt 204. A storage slot is formed between two adjacent partition plates 205 and the elastic bands 206, and the inside thereof can be used for storing materials. After the materials are weighed, materials of a specific weight can be stored in a storage slot, so that when the feeding operation of the present application is carried out, a quantitative effect is achieved.

[0047] The weighing module 300 includes a weighing hopper 301 and two symmetrically arranged second support frames 311 (as Figure 13 shown). A third support frame 312 is cooperatively installed on one side of the second support frame 311. A first sensor mounting plate 313 is provided on the third support frame 312, and a second sensor mounting plate 314 is provided on the weighing hopper 301. The first sensor mounting plate 313 and the second sensor mounting plate 314 are arranged in one-to-one correspondence, and a weighing sensor 315 is cooperatively installed between the corresponding first sensor mounting plate 313 and the second sensor mounting plate 314.

[0048] Corresponding mounting grooves are formed on both the first sensor mounting plate 313 and the second sensor mounting plate 314. The weighing sensor 315 is placed in the corresponding mounting groove and fixedly connected by corresponding bolts. In this embodiment, the number of weighing sensors 315 is four.

[0049] A rotating shaft 304 is installed in the weighing hopper 301. A blocking plate 303 is rotatably installed on the rotating shaft 304. A support plate 310 is fixedly installed on one side of the blocking plate 303. An elastic plate 316 is cooperatively installed between one end of the support plate 310 and the weighing hopper 301. Several windows 306 are formed on the weighing hopper 301 (as Figure 15As shown, a number of counterweight balls 309 are fitted at one end of the plugging plate 303.

[0050] It should be noted that, generally, the plugging plate 303 will tilt towards the end with the counterweight balls 309, so that the other end of the plugging plate 303 seals the opening below the weighing hopper 301 (refer to Figure 15 ); the weight of the counterweight balls 309 needs to be maintained such that when a fixed amount of material is filled in the weighing hopper 301, the plugging plate 303 will not tilt towards the other end; in this embodiment, the elastic plate 316 is made of silicone material with high toughness, which can produce a certain amount of deflection and deformation. The elastic plate 316 can prevent the material from falling below the plugging plate 303 when it falls into the weighing hopper 301, and when the plugging plate 303 and the support plate 310 tilt, the elastic plate 316 can also achieve a plugging effect (refer to Figure 16 and Figure 17 ). The corresponding side walls of the plugging plate 303, the support plate 310, and the elastic plate 316 are slidably fitted with the inner wall of the weighing hopper 301, and one end of the elastic plate 316 is fixed to the inner wall of the weighing hopper 301 with glue.

[0051] The weighing module 300 further includes a first support frame 305. The first support frame 305 is located below the weighing hopper 301. A number of electromagnets 307 are fitted on the first support frame 305. The electromagnets 307 are arranged in one-to-one correspondence with the windows 306. A number of magnets 308 are provided on the plugging plate 303. The magnets 308 are arranged in one-to-one correspondence with the electromagnets 307. The electromagnets 307 and the magnets 308 repel each other (refer to Figure 16 and Figure 17 ). The repulsive force between the electromagnets 307 and the magnets 308 can push the plugging plate 303 to rotate, so that the plugging of the lower end of the weighing hopper 301 by the plugging plate 303 fails. During this process, the counterweight balls 309 periodically strike the elastic plate 316, causing the residual material on the elastic plate 316, the plugging plate 303, and the support plate 310 to be shaken off and discharged through the feeding port below the weighing hopper 301.

[0052] In this embodiment, when the electromagnets 307 are energized, a repulsive force will be generated between the electromagnets 307 and the magnets 308, thereby pushing the end of the plugging plate 303 with the counterweight balls 309 upward, causing the counterweight balls 309 to strike the elastic plate 316, thereby causing vibration between the elastic plate 316, the support plate 310, and the plugging plate 303, and shaking off the material above them. Moreover, in this embodiment, there are only four weighing sensors 315 among the parts in contact with the weighing hopper 301, and there are no other external cables and fluid pipelines, avoiding interference from external situations and greatly ensuring the weighing accuracy of the weighing module 300.

[0053] Refer to Figure 18, which is a feeding device with a weighing structure in current use. In the figure, a is the conveyor belt and b is the weighing plate installed inside the conveyor belt. This architectural design inevitably subjects the weighing unit to mechanical vibration coupling interference. At the same time, the change in the conveyor belt tension will generate a dynamic additional force of 0.3 - 1.2 kN, which will result in a weighing deviation of at least 2.5%, seriously affecting the accuracy of batch feeding. However, referring to the above-mentioned weighing module 300, it forms a statically determinate support structure through four groups of weighing sensors 315, completely eliminating the parasitic force interference caused by traditional pipeline conduction, and can achieve a relatively high weighing accuracy, obtaining a huge improvement compared to the weighing structure of traditional feeding devices.

[0054] The screening module 400 includes a screening bin 401. The screening bin 401 is inclined. A collection trough 402 is installed in cooperation with the upper side of the screening bin 401. A first screening mesh 4071 and a second screening mesh 4072 are installed in cooperation inside the screening bin 401. The first screening mesh 4071 is located above the second screening mesh 4072. The mesh number of the first screening mesh 4071 is smaller than that of the second screening mesh 4072. The internal space of the screening bin 401 is divided into three-layer channels by the first screening mesh 4071 and the second screening mesh 4072. The first channel 4081 is above the first screening mesh 4071. The second channel 4082 is between the first screening mesh 4071 and the second screening mesh 4072. The third channel 4083 is below the second screening mesh 4072. A vibration motor 409 is installed in cooperation on one side of the collection trough 402. In this embodiment, the material is screened into three different particle sizes of materials through the first screening mesh 4071 and the second screening mesh 4072 to better complete the next precise feeding operation.

[0055] At the lower end of the screening bin 401, a first discharge auger 4031, a second discharge auger 4032 and a third discharge auger 4033 are cooperatively installed. The first channel 4081 communicates with the third discharge auger 4033, the second channel 4082 communicates with the second discharge auger 4032, and the third channel 4083 communicates with the first discharge auger 4031. One end of each of the first discharge auger 4031, the second discharge auger 4032 and the third discharge auger 4033 is cooperatively installed with a servo motor 404. Both ends of the first discharge auger 4031 are provided with first discharge ports 4051, both ends of the second discharge auger 4032 are provided with second discharge ports 4052, and both ends of the third discharge auger 4033 are provided with third discharge ports 4053. One of the first discharge ports 4051, the second discharge ports 4052 and the third discharge ports 4053 is located above the weighing module 300, and the other first discharge ports 4051, the second discharge ports 4052 and the third discharge ports 4053 are located outside the bracket 500. The materials in the third discharge auger 4033 and the third discharge port 4053 are large particle size materials, the materials in the second discharge auger 4032 and the second discharge port 4052 are medium particle size materials, and the materials in the first discharge auger 4031 and the first discharge port 4051 are small particle size materials.

[0056] In this embodiment, the main control PLC executes a three - order feeding program according to the data obtained by the weighing sensor 315 (the plc controller is a conventional technology in the art and is not shown in the figure): First, a weight value X is set according to the weight required for a single feeding; control the third discharge auger 4033 to fill the large particle size materials into the weighing hopper 301. When the weight value Y1 monitored by the weighing module 300 reaches 78% ± 2% of the preset weight value X, the third discharge auger 4033 stops running; the second discharge auger 4032 runs to fill the medium particle size materials into the weighing hopper 301. When the weight value Y1 monitored by the weighing module 300 reaches 93% ± 1% of the preset weight value X, the second discharge auger 4032 stops running; the first discharge auger 4031 runs to fill the small particle size materials into the weighing hopper 301 until the weight value Y1 monitored by the weighing module 300 meets the requirement of the preset weight value X, and the first discharge auger 4031 stops running.

[0057] In this embodiment, several sensors are installed in each of the first channel 4081, the second channel 4082 and the third channel 4083 (refer to Figure 10In c) thereof, an ultrasonic sensor is adopted (which can monitor the material condition in the channel through ultrasonic waves). Its main purpose is to monitor whether blockage occurs in the channel. If blockage occurs, the materials at the blocked position are discharged through the corresponding discharging augers (i.e., the first discharging auger 4031, the second discharging auger 4032, and the third discharging auger 4033) through the discharging ports outside the bracket 500 (i.e., the first discharging port 4051, the second discharging port 4052, and the third discharging port 4053) to prevent material blockage.

[0058] A fourth support frame 406 is fitted and installed on the bracket 500. The bracket 500 is connected to the screening bin 401 through the fourth support frame 406. The screening bin 401 is also fixed to the bracket 500 through some mounting plates.

[0059] In another embodiment of the present application, as Figures 1 - 15 shown, on the basis of the above embodiment, different from the above embodiment, the pulse gas nozzles 317 are used to replace the electromagnet 307 and the magnet 308. A number of pulse gas nozzles 317 are fitted and installed on the first support frame 305. The pulse gas nozzles 317 are arranged opposite to the windows 306 one by one. The pulse gas nozzles 317 are oriented towards the side of the plugging plate 303 where the counterweight ball 309 is installed. Both the first support frame 305 and the second support frame 311 are fixedly installed on the bracket 500 through the corresponding mounting plates.

[0060] In this embodiment, the pulse gas nozzles 317 are connected to the corresponding pumping stations, and the pumping stations provide gas for the pulse gas nozzles 317. The pumping stations can be used independently of this application, and the pumping stations are conventional prior arts and are not shown in the figure. And in this embodiment, there are only four load cells 315 among the parts in contact with the weighing hopper 301, and there are no other external cables and fluid pipelines, avoiding the interference of external conditions and greatly ensuring the weighing accuracy of the weighing module 300.

[0061] In another embodiment of the present application, referring to Figures 19 - 21 , on the basis of the previous embodiment, the electromagnet 307 is a tubular electromagnet, and the pulse gas nozzles 317 are installed in the hollow position inside it. A guiding plate 318 is installed inside the weighing hopper 301. The lower end of the guiding plate 318 is arranged opposite to the elastic plate 316, and the weighing hopper 301 and its internal parts are all made of non-metallic materials.

[0062] The usage steps of this embodiment are as follows: Step 1: First, the materials fall on the first conveying module 100 and are fed into the screening bin 401 via the first conveying module 100; Step 2: According to different particle sizes, the materials in the screening bin 401 are divided into three types of materials with large, medium, and small particle sizes. A standard weight value X is set for the weight of a single feeding according to requirements. The materials are fed into the weighing hopper 301 in a three-stage feeding manner according to the weight value X. Step 3: When the materials enter the weighing hopper 301, they first fall on the elastic plate 316 under the guidance of the guide plate 318 and then fall through the elastic plate 316. During this process, the electromagnet 307 is in the on state, and it can adsorb the metal impurities contained in the materials (refer to Figure 20 d in it, which is a metal that can be magnetically adsorbed and exists in the recycled plastic granular materials). Step 4: When the weight value Y1 monitored by the weighing module 300 reaches the required preset weight value X, the pulsed gas nozzle 317 sprays an appropriate amount of gas, causing the blocking plate 303 to vibrate within a certain range. The materials in the weighing hopper 301 are discharged through the opening below it by vibration (when the pulsed gas nozzle 317 sprays intermittent gas, it is necessary to ensure that the counterweight ball 309 at one end of the blocking plate 303 does not contact the elastic plate 316, and the blocking plate 303 needs to maintain an amplitude of ±5 degrees. Refer to Figure 20 , and the maximum air pressure sprayed by the nozzle at this time is L1). Step 5: After a set time (15 s in this embodiment), the pulsed gas nozzle 317 stops spraying gas. At this time, the materials in the weighing hopper 301 have fallen into the storage tank (No. 1). After waiting for 15 s for the blocking plate 303 to return to the predetermined state (refer to Figure 19 ), the electromagnet 307 is powered off. The weight value Y1 monitored by the weighing module 300 at this time is compared with the weight value Y2 monitored when there is no material in the weighing module 300 (the value of Y2 is set when the equipment runs for the first time and there is no material in the weighing module 300). If the value of Y1 / Y2 is less than 100.05%, it means that everything is normal, and the second conveying module 200 is driven to put the materials in the corresponding storage tank (No. 1) into the predetermined position (refer to Figure 5 f end in it). If the value of Y1 / Y2 is greater than or equal to 100.05%, it means that the materials contain metal impurities. Step 6: When there are metal impurities inside the material, the second conveying module 200 rotates to move a new storage tank (No. 2) under the weighing hopper 301. Then, the pulse gas nozzle 317 blows to vibrate the blocking plate 303 again, causing the metal impurities to fall into the lower storage tank (No. 2) (at this time, the maximum air pressure sprayed by the nozzle is L2, and L2 should be greater than 1.5 times of L1). Compare the weight value Y1 monitored by the weighing module 300 at this time with the weight value Y2 monitored when there is no material in the weighing module 300. If the value of Y1 / Y2 is less than 100.05%, it means that the metal impurities in the weighing hopper 301 have been shaken off. First, drive the second conveying module 200 to discharge the metal impurities in the storage tank (No. 2) through a predetermined position (refer to the e end in Figure 5 ), and then drive the second conveying module 200 to put the material in the corresponding storage tank (No. 1) into a predetermined position (refer to the f end in Figure 5 ). If the value of Y1 / Y2 is greater than or equal to 100.05%, it means that there may be material stuck in the weighing hopper 301 at this time; Step 7: When there may be material stuck in the weighing hopper 301, the pulse gas nozzle 317 blows strongly to vibrate the blocking plate 303 (at this time, the blowing gas pressure L3 is preferably twice that of L2. This method may shorten the service life of the elastic plate 316, and the blowing time should be appropriately shortened at this time), causing it to vibrate greatly, and then shaking off the impurities in the weighing hopper 301. After a predetermined time, the pulse gas nozzle 317 stops blowing. Monitor the weight value Y1 monitored by the weighing module 300 again. If the value of Y1 / Y2 is less than 100.05%, it means that the material stuck in the weighing hopper 301 has been removed. At this time, control the drive of the second conveying module 200 to first discharge the metal impurities in the storage tank (No. 2) through a predetermined position (refer to the e end in Figure 5 ), and then drive the second conveying module 200 to put the material in the corresponding storage tank (No. 1) into a predetermined position (refer to the f end in Figure 5 ). At the same time, the main control system issues a warning to be investigated, indicating that the material contains metal impurities and is prone to blockage in the weighing hopper 301. If the value of Y1 / Y2 is greater than or equal to 100.05%, the whole system shuts down and generates an alarm message about damage to the weighing hopper 301 and the weighing sensor 315.

[0063] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Also, the terms "comprises," "comprising," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The weighing module of a feeding device with a sensor weighing structure, characterized in that, It includes a bracket, on which a first conveying module, a second conveying module, a weighing module and a screening module are cooperatively installed; The weighing module and the screening module are located between the first conveying module and the second conveying module, and the screening module is located above the weighing module; The screening module includes a screening bin, which is inclined. A collection trough is cooperatively installed on the upper side of the screening bin. A first screening mesh and a second screening mesh are cooperatively installed in the screening bin. The first screening mesh is located above the second screening mesh. The mesh number of the first screening mesh is smaller than that of the second screening mesh. The internal space of the screening bin is divided into three-layer channels by the first screening mesh and the second screening mesh. A first discharge auger, a second discharge auger and a third discharge auger are cooperatively installed at the lower end of the screening bin. The first discharge auger, the second discharge auger and the third discharge auger are respectively communicated with the one-layer channel. Discharge ports are respectively arranged at both ends of the first discharge auger, the second discharge auger and the third discharge auger. One discharge port of each discharge auger is correspondingly arranged with the weighing module, and the other discharge port is located outside the bracket.

2. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, The first conveying module includes a first mounting frame, on which a first driving roller and a first driven roller are installed. A first conveyor belt is cooperatively installed on the first driving roller and the first driven roller. A number of grooves are formed on the first conveyor belt.

3. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, The second conveying module includes a second mounting frame, on which a second driving roller, a number of second driven rollers and a number of supporting rollers are installed. A second conveyor belt is cooperatively installed on the second driving roller, the number of second driven rollers and the number of supporting rollers. A number of partition plates are cooperatively installed on the second conveyor belt. Two oppositely arranged elastic bands are cooperatively installed between two adjacent partition plates.

4. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, The weighing module includes a weighing hopper, a first support frame and two symmetrically arranged second support frames. A third support frame is cooperatively installed on one side of the second support frame. A first sensor mounting plate is arranged on the third support frame. A second sensor mounting plate is arranged on the weighing hopper. The first sensor mounting plate and the second sensor mounting plate are correspondingly arranged one by one. A weighing sensor is cooperatively installed between the corresponding first sensor mounting plate and the second sensor mounting plate.

5. The weighing module of a feeding device with a sensor weighing structure according to claim 4, characterized in that, A rotating shaft is installed in the weighing hopper. A blocking plate is rotatably installed on the rotating shaft. A support plate is fixedly installed on one side of the blocking plate. An elastic plate is cooperatively installed between one end of the support plate and the weighing hopper. A number of windows are formed on the weighing hopper. A number of counterweight balls are cooperatively installed at one end of the blocking plate.

6. The weighing module of a feeding device with a sensor weighing structure according to claim 5, characterized in that, A number of pulse gas nozzles are cooperatively installed on the first support frame. The pulse gas nozzles are correspondingly arranged one by one with the windows, and the pulse gas nozzles are installed towards the side of the blocking plate with the counterweight balls.

7. The weighing module of a feeding device with a sensor weighing structure according to claim 5, characterized in that, A number of electromagnets are cooperatively installed on the first support frame. The electromagnets are correspondingly arranged one by one with the windows. A number of magnets are arranged on the blocking plate. The magnets and the electromagnets are correspondingly arranged one by one, and the electromagnets and the magnets repel each other.

8. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, A fourth support frame is cooperatively installed on the bracket. The bracket, the screening bin and the bracket are connected through the fourth support frame. A vibration motor is cooperatively installed on one side of the collection trough.

9. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, Above the first screening net is the first channel, between the first screening net and the second screening net is the second channel, and below the second screening net is the third channel. The first channel is connected to the first discharge auger, the second channel is connected to the second discharge auger, and the third channel is connected to the first discharge auger. Servo motors are cooperatively installed at one end of the first discharge auger, the second discharge auger, and the third discharge auger.

10. The weighing module of a feeding device with a sensor weighing structure according to claim 1, characterized in that, At both ends of the first discharge auger, the second discharge auger, and the third discharge auger are respectively provided with a first discharge port, a second discharge port, and a third discharge port. One of the first discharge port, the second discharge port, and the third discharge port is located above the weighing module, and the other first discharge port, second discharge port, and third discharge port are located outside the bracket.

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