A weighing module of a feeding device with a sensor weighing structure

Abstract

The present invention discloses a weighing module of a feeding device with a sensor weighing structure, which relates to the field of conveying technology and includes a bracket on which a first conveying module, a second conveying module, a weighing module, and a screening module are mounted. 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 tilted and a collecting trough is mounted on the upper side of the screening bin. A first screening net and a second screening net are mounted in the screening bin, and the internal space of the screening bin is divided into three layers of channels by the first screening net and the second screening net. Three discharge augers are mounted at the lower end of the screening bin. The weighing module of the present invention is separately arranged without interference from other pipelines, so that the weighing result is more accurate. The present invention can also perform a feeding operation of a specific weight, so that the weight of the material fed at a single time is more accurate.

Description

Technical Field

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

[0002] The feeding device is generally a commonly used machine in industrial production, which generally completes the feeding function directly through a conveyor belt; the material is directly fed into the production end (reactor in the chemical industry, furnace in the smelting industry, etc.) through the conveyor belt for production.

[0003] Currently, mainstream feeding systems generally utilize continuous conveyor belt feeding, a process that presents two significant technical bottlenecks. First, in terms of weighing control, due to speed fluctuations and accumulation effects during material transportation, accurate measurement of the weight of a single feed is difficult to achieve. Second, in terms of weighing system design, existing systems often utilize an integrated belt scale structure, with the load cell mounted directly on the conveyor belt support frame. This architectural design inevitably subjects the weighing unit to mechanical vibration coupling interference. Furthermore, variations in conveyor belt tension generate a dynamic additional force of 0.3-1.2 kN, resulting in weighing deviations of at least 2.5%, seriously impacting batch feeding accuracy. Summary of the Invention

[0004] In order to solve the problems of inaccurate weighing and inaccurate feeding weight raised in the above background technology, the present invention aims to provide a weighing module of a feeding device with a sensor weighing structure.

[0005] To achieve the above object, the present invention provides the following technical solution: a weighing module of a feeding device with a sensor weighing structure, comprising a bracket on which a first conveying module, a second conveying module, a weighing module and a screening module are mounted;

[0006] 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;

[0007] The screening module includes a screening bin, which is tilted and has a collecting trough installed on the upper side of the screening bin;

[0008] A first screening net and a second screening net are installed in the screening bin. The first screening net is located above the second screening net. The mesh number of the first screening net is smaller than that of the second screening net. The internal space of the screening bin is divided into three layers of channels by the first screening net and the second screening net. A first discharging auger, a second discharging auger and a third discharging auger are installed at the lower end of the screening bin. The first discharging auger, the second discharging auger and the third discharging auger are respectively connected to one layer of channels.

[0009] Both ends of the first discharging auger, the second discharging auger and the third discharging auger are respectively provided with a discharging port, one discharging port of each discharging auger is arranged corresponding to the weighing module, and the other discharging port is located outside the bracket.

[0010] Preferably, the first conveying module includes a first mounting frame, on which a first driving roller and a first driven roller are mounted, and a first conveying belt is mounted on the first driving roller and the first driven roller, and a plurality of grooves are provided on the first conveying belt.

[0011] Preferably, the second conveying module includes a second mounting frame, on which a second driving roller, several second driven rollers and several supporting rollers are installed, and a second conveyor belt is installed on the second driving roller, several second driven rollers and several supporting rollers, and several partitions are installed on the second conveyor belt, and two relatively arranged elastic belts are installed between two adjacent partitions.

[0012] Preferably, the weighing module includes a weighing bucket, a first support frame and two symmetrically arranged second support frames, a third support frame is installed on one side of the second support frame, a first sensor mounting plate is provided on the third support frame, and a second sensor mounting plate is provided on the weighing bucket. The first sensor mounting plate and the second sensor mounting plate are arranged in one-to-one correspondence, and a weighing sensor is installed between the corresponding first sensor mounting plate and the second sensor mounting plate.

[0013] Preferably, a rotating shaft is installed in the weighing bucket, a sealing plate is rotatably installed on the rotating shaft, a support plate is fixedly installed on one side of the sealing plate, an elastic plate is installed between one end of the support plate and the weighing bucket, several windows are opened on the weighing bucket, and several counterweight balls are installed at one end of the sealing plate.

[0014] Preferably, a plurality of pulse gas nozzles are mounted on the first support frame. The pulse gas nozzles are arranged opposite to the windows one by one, and the pulse gas nozzles face the side of the sealing plate where the counterweight ball is mounted.

[0015] Preferably, a plurality of electromagnets are mounted on the first support frame, and the electromagnets are arranged opposite to the windows one by one. A plurality of magnets are provided on the blocking plate, and the magnets are arranged opposite to the electromagnets one by one, and the electromagnets repel each other.

[0016] Preferably, a fourth support frame is mounted on the bracket, the bracket is connected to the screening bin and the bracket via the fourth support frame, and a vibration motor is mounted on one side of the collecting tank.

[0017] Preferably, the first channel is above the first screening net, the second channel is between the first screening net and the second screening net, and the third channel is below the second screening net. The first channel is connected to the third discharging auger, the second channel is connected to the second discharging auger, and the third channel is connected to the first discharging auger. A servo motor is installed at one end of the first discharging auger, the second discharging auger and the third discharging auger.

[0018] Preferably, the first discharging port, the second discharging port and the third discharging port are respectively provided at both ends of the first discharging port, the second discharging port and the third discharging port, one of the first discharging port, the second discharging port and the third discharging port is located above the weighing module, and the other first discharging port, the second discharging port and the third discharging port are located outside the bracket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention adopts a contactless weighing architecture. First, at the mechanical structure level, the weighing module adopts a fully suspended sensor support system, and four groups of weighing sensors form a static support structure, which completely eliminates the ±0.2-0.5N parasitic force interference caused by traditional pipeline conduction; secondly, in the discharge actuator, a pulse pneumatic control sealing plate is used to disable the sealing of the symmetrical weighing bucket (or controlled by magnets and electromagnets with the same poles repelling each other), so that the material falls into the second conveying module below, ultimately achieving higher weighing accuracy, which is a huge improvement over the traditional conveyor belt weighing system.

[0021] When the material enters the screening module through the first conveying module, the material can be classified according to the particle size through the first screening net and the second screening net in the screening module. The weight of materials with different particle sizes is also different. When it is necessary to control the weight of each feeding, the third discharging auger is first controlled to run, and the material with larger particle size is put into the weighing module. When the material in the weighing module reaches 70% to 80% of the predetermined weight of a single feeding, the third discharging auger stops running, and then the second discharging auger is controlled to run, and the material with medium particle size is put into the weighing module. When the material in the weighing module reaches 90% to 95% of the predetermined weight of a single feeding, the second discharging auger stops running, and finally the first discharging auger is controlled to run, and the material with smaller particle size is put 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 multi-component material proportioning process by combining particle size classification with flow step control, and significantly improves the system's adaptability to complex production processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a basic structural diagram of a weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0023] Figure 2The weighing module of the feeding device with a sensor weighing structure of the present invention Figure 1 main view.

[0024] Figure 3 The weighing module of the feeding device with a sensor weighing structure of the present invention Figure 1 Top view of .

[0025] Figure 4 The weighing module of the feeding device with a sensor weighing structure of the present invention Figure 3 AA cross-sectional view.

[0026] Figure 5 This is a schematic diagram of the passage of materials between the weighing modules of a feeding device with a sensor weighing structure of the present invention.

[0027] Figure 6 This is a basic structural diagram of a screening module of a weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0028] Figure 7 The figure is a 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 of the present invention.

[0029] Figure 8 The weighing module of the feeding device with a sensor weighing structure of the present invention Figure 7 Another perspective of the picture.

[0030] Figure 9 The weighing module of the feeding device with a sensor weighing structure of the present invention Figure 8 Magnified view of part A.

[0031] Figure 10 The figure is a schematic diagram of the internal structure of the screening module and the weighing module of the weighing module of the feeding device with a sensor weighing structure of the present invention.

[0032] Figure 11 This is a basic structural diagram of the first conveying module of a weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0033] Figure 12 This is a basic structural diagram of the second conveying module of a weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0034] Figure 13 The basic structure diagram of the weighing module of the weighing module of the feeding device with a sensor weighing structure of the present invention is as follows: Figure 1 .

[0035] Figure 14 The basic structure diagram of the weighing module of the weighing module of the feeding device with a sensor weighing structure of the present invention is as follows: Figure 2 .

[0036] Figure 15 Schematic diagram of the internal structure of a weighing module of a feeding device with a sensor weighing structure of the present invention Figure 1 .

[0037] Figure 16 Schematic diagram of the internal structure of a weighing module of a feeding device with a sensor weighing structure of the present invention Figure 2 .

[0038] Figure 17 Schematic diagram of the internal structure of a weighing module of a feeding device with a sensor weighing structure of the present invention Figure 3 .

[0039] Figure 18 This is a schematic diagram of the current location of the conveyor belt weighing structure.

[0040] Figure 19 The internal structure diagram of the weighing module of the weighing module of the feeding device with a sensor weighing structure of the present invention is as follows Figure 4 .

[0041] Figure 20 The internal structure diagram of the weighing module of the weighing module of the feeding device with a sensor weighing structure of the present invention is as follows Figure 5 .

[0042] Figure 21 This is a flow chart of the third embodiment of a weighing module of a feeding device with a sensor weighing structure according to the present invention.

[0043] In the picture:

[0044] 100, first conveying module; 101, first mounting frame; 102, first driving roller; 103, first driven roller; 104, first conveyor belt; 105, groove;

[0045] 200, second conveying module; 201, second mounting frame; 202, second driving roller; 203, second driven roller; 204, second conveyor belt; 205, partition; 206, elastic belt; 207, support roller;

[0046] 300, weighing module; 301, weighing bucket; 303, blocking 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 nozzle; 318, guide plate;

[0047] 400, screening module; 401, screening chamber; 402, collecting trough; 4031, first discharging auger; 4032, second discharging auger; 4033, third discharging auger; 404, servo motor; 4051, first discharging port; 4052, second discharging port; 4053, third discharging port; 406, fourth support frame; 4071, first screening net; 4072, second screening net; 4081, first channel; 4082, second channel; 4083, third channel; 409, vibration motor;

[0048] 500. Bracket. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] like Figures 1-15 As shown, the present embodiment provides a weighing module of a feeding device with a sensor weighing structure, including a bracket 500 , on which a first conveying module 100 , a second conveying module 200 , a weighing module 300 and a screening module 400 are mounted.

[0051] 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 .

[0052] The first conveying module 100 includes a first mounting frame 101 (such as Figure 11 As shown), a first driving roller 102 and a first driven roller 103 are installed on the first mounting frame 101, and a first conveyor belt 104 is installed on the first driving roller 102 and the first driven roller 103. The first conveyor belt 104 is provided with a plurality of grooves 105.

[0053] In this embodiment, the first conveying module 100 is placed horizontally, 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.

[0054] The second conveying module 200 includes a second mounting frame 201 (such as Figure 12 As shown), a second driving roller 202, a plurality of second driven rollers 203 and a plurality of supporting rollers 207 are installed on the second mounting frame 201, and a second conveyor belt 204 is installed on the second driving roller 202, the plurality of second driven rollers 203 and the plurality of supporting rollers 207. During installation, the second conveyor belt 204 is sleeved and installed on the second driving roller 202 and the plurality of second driven rollers 203, and the second conveyor belt 204 is limited and shaped by the supporting rollers 207. A plurality of partitions 205 are installed on the second conveyor belt 204, and two adjacent partitions 205 are installed between two relatively arranged elastic belts 206.

[0055] The first driving roller 102 and the second driving roller 202 are both driven by corresponding stepping motors. Driving by stepping motors is a conventional prior art in the art and is not shown in the drawings.

[0056] In this embodiment, the second conveying module 200 has a "Z"-shaped structure. The lower end of the second conveying module 200 is located below the first conveying module 100, and the upper end of the second conveying module 200 is flush with the first conveying module 100. The partitions 205 are arranged perpendicular to the second conveyor belt 204. A storage trough is formed between two adjacent partitions 205 and the elastic belt 206. The interior of the storage trough can be used for storing materials. After the materials are weighed, a specific weight of materials can be stored in a storage trough, thereby achieving a quantitative effect during the feeding operation of the present application.

[0057] The weighing module 300 includes a weighing bucket 301 and two symmetrically arranged second support frames 311 (such as Figure 13 As shown), a third support frame 312 is 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 bucket 301. The first sensor mounting plate 313 and the second sensor mounting plate 314 are arranged in a one-to-one correspondence, and a weighing sensor 315 is installed between the corresponding first sensor mounting plate 313 and the second sensor mounting plate 314.

[0058] Corresponding mounting grooves are provided on the first sensor mounting plate 313 and the second sensor mounting plate 314 . The weighing sensors 315 are placed in the corresponding mounting grooves and fixedly connected by corresponding bolts. In this embodiment, there are four weighing sensors 315 .

[0059] A rotating shaft 304 is installed in the weighing bucket 301, and 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 installed between one end of the support plate 310 and the weighing bucket 301. A plurality of windows 306 (such as Figure 15 As shown), a plurality of weighted balls 309 are mounted on one end of the blocking plate 303.

[0060] It should be noted that, in general, the blocking plate 303 will tilt toward the end provided with the weight ball 309, so that the other end of the blocking plate 303 blocks the opening below the symmetrical weight bucket 301 (refer to Figure 15 ); The weight of the counterweight ball 309 needs to be maintained in the weighing bucket 301 when the quantitative material is filled, and the blocking plate 303 will not tilt toward 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 under the blocking plate 303 when it falls into the weighing bucket 301, and when the blocking plate 303 and the support plate 310 are tilted, the elastic plate 316 can also play a blocking effect (refer to Figure 16 and Figure 17 ), the corresponding two side walls of the blocking plate 303, the support plate 310, and the elastic plate 316 are slidably matched with the inner wall of the weighing bucket 301, and one end of the elastic plate 316 is fixed to the inner wall of the weighing bucket 301 by glue.

[0061] The weighing module 300 further includes a first support frame 305, which is located below the weighing bucket 301. A plurality of electromagnets 307 are mounted on the first support frame 305. The electromagnets 307 are arranged opposite to the windows 306. The blocking plate 303 is provided with a plurality of magnets 308. The magnets 308 are arranged opposite to the electromagnets 307. The electromagnets 307 and the magnets 308 repel each other (see FIG. Figure 16 and Figure 17 ), the repulsive force between the electromagnet 307 and the magnet 308 can push the sealing plate 303 to rotate, thereby making the sealing of the sealing plate 303 at the lower end of the weighing bucket 301 invalid. During this process, the counterweight ball 309 periodically hits the elastic plate 316, so that the remaining materials on the elastic plate 316, the sealing plate 303 and the support plate 310 are shaken off and discharged through the feeding port below the weighing bucket 301.

[0062] In this embodiment, when the electromagnet 307 is energized, a repulsive force is generated between the electromagnet 307 and the magnet 308, thereby pushing the end of the sealing plate 303 equipped with the counterweight ball 309 to move upward, causing the counterweight ball 309 to hit the elastic plate 316, thereby causing vibration between the elastic plate 316, the support plate 310 and the sealing plate 303, thereby shaking off the material above them. In this embodiment, the only parts in contact with the weighing bucket 301 are four weighing sensors 315, and there are no other external cables and fluid pipelines, which avoids interference from external conditions and greatly ensures the weighing accuracy of the weighing module 300.

[0063] Reference Figure 18 , which is a feeding device with a weighing structure currently in use. In the figure, a is a conveyor belt, and b is a weighing plate installed inside the conveyor belt. This structural design makes the weighing unit inevitably subject to mechanical vibration coupling interference. At the same time, the change in the tension of the conveyor belt will generate a dynamic additional force of 0.3-1.2kN, which will lead to at least 2.5% weighing deviation, seriously affecting the accuracy of batch feeding; but 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 higher weighing accuracy, which is a huge improvement compared to the weighing structure of traditional feeding devices.

[0064] The screening module 400 includes a screening bin 401, which is tilted. A collecting trough 402 is installed on the upper side of the screening bin 401. A first screening net 4071 and a second screening net 4072 are installed in the screening bin 401. The first screening net 4071 is located above the second screening net 4072. The mesh number of the first screening net 4071 is smaller than that of the second screening net 4072. The internal space of the screening bin 401 is divided into three layers of channels by the first screening net 4071 and the second screening net 4072. The first channel 4081 is above the first screening net 4071, the second channel 4082 is between the first screening net 4071 and the second screening net 4072, and the third channel 4083 is below the second screening net 4072. A vibration motor 409 is installed on one side of the collecting trough 402. In this embodiment, the material is screened into three materials with different particle sizes by the first screening net 4071 and the second screening net 4072, so as to better complete the next step of precise feeding operation.

[0065] The lower end of the screening bin 401 is equipped with a first discharging auger 4031, a second discharging auger 4032 and a third discharging auger 4033. The first channel 4081 is connected to the third discharging auger 4033, the second channel 4082 is connected to the second discharging auger 4032, and the third channel 4083 is connected to the first discharging auger 4031. The first discharging auger 4031, the second discharging auger 4032 and the third discharging auger 4033 are all equipped with a servo motor 404 at one end. Both ends of the first discharging auger 4031 are provided with a first discharging port 4051, and both ends of the second discharging auger 4032 are provided with a second discharging port 4052. 52. A third discharge port 4053 is provided at both ends of the third discharge auger 4033, wherein the first discharge port 4051, the second discharge port 4052 and the third discharge port 4053 are located above the weighing module 300, and the other first discharge port 4051, the second discharge port 4052 and the third discharge port 4053 are located outside the bracket 500. The materials in the third discharge auger 4033 and the third discharge port 4053 are large-particle materials, the materials in the second discharge auger 4032 and the second discharge port 4052 are medium-particle materials, and the materials in the first discharge auger 4031 and the first discharge port 4051 are small-particle materials.

[0066] In this embodiment, the main control PLC executes a three-stage feeding program based on the data obtained by the weighing sensor 315 (the PLC controller is conventional technology in this field and is not shown in the figure): first, a weight value X is set according to the weight of a single feeding as required; the third discharging auger 4033 is controlled to fill the large-particle material 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 discharging auger 4033 stops running; the second discharging auger 4032 runs to fill the medium-particle material 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 discharging auger 4032 stops running; the first discharging auger 4031 runs to fill the small-particle material into the weighing hopper 301 until the weight value Y1 monitored by the weighing module 300 reaches the preset weight value X, and the first discharging auger 4031 stops running.

[0067] In this embodiment, a plurality of sensors are installed in the first channel 4081, the second channel 4082, and the third channel 4083 (refer to Figure 10In item c), the sensor adopts an ultrasonic sensor (which can monitor the material situation in the channel through ultrasonic waves). Its main purpose is to monitor whether blockage occurs in the channel. If blockage occurs, the material at the blocked location is discharged through the corresponding discharge augers (i.e., the first discharge augers 4031, the second discharge augers 4032 and the third discharge augers 4033) through the discharge ports on the outside of the bracket 500 (i.e., the first discharge port 4051, the second discharge port 4052 and the third discharge port 4053) to prevent material blockage.

[0068] The bracket 500 is equipped with a fourth support frame 406 . The bracket 500 and the screening chamber 401 are connected via the fourth support frame 406 . The screening chamber 401 is also fixed to the bracket 500 via some mounting plates.

[0069] In another embodiment of the present application, Figures 1-15 As shown, based on the above embodiment, the difference from the above embodiment is that the electromagnet 307 and the magnet 308 are replaced by a pulse gas nozzle 317, and a plurality of pulse gas nozzles 317 are installed on the first support frame 305. The pulse gas nozzles 317 and the windows 306 are arranged one by one opposite to each other, and the pulse gas nozzles 317 are facing the side of the sealing plate 303 where the counterweight ball 309 is installed. The first support frame 305 and the second support frame 311 are fixedly installed on the bracket 500 through corresponding mounting plates.

[0070] In this embodiment, the pulse gas nozzle 317 is connected to the corresponding pump station, and gas is provided to the pulse gas nozzle 317 through the pump station. The pump station can be used independently of this application, and the pump station is a conventional existing technology and is not shown in the figure. In this embodiment, the parts in contact with the weighing bucket 301 are only four weighing sensors 315, and there are no other external cables and fluid pipelines, which avoids interference from external conditions and greatly ensures the weighing accuracy of the weighing module 300.

[0071] 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 a pulse gas nozzle 317 is installed in the hollow position inside it. A guide plate 318 is installed inside the weighing bucket 301, and the lower end of the guide plate 318 is arranged opposite to the elastic plate 316, and the weighing bucket 301 and its internal parts are required to be made of non-metallic materials.

[0072] The steps for using this embodiment are as follows:

[0073] Step 1: First, the material falls on the first conveying module 100 and is put into the screening bin 401 through the first conveying module 100;

[0074] Step 2: The material is divided into three types of particle sizes in the screening bin 401: large, medium and small. A standard weight value X is set according to the weight of a single charge, and the material is charged into the weighing hopper 301 in a three-level charging manner according to the weight value X.

[0075] Step 3: When the material enters the weighing hopper 301, it will first fall onto the elastic plate 316 through the guide of the guide plate 318, and then fall through the elastic plate 316. During this process, the electromagnet 307 is in the on state, which can absorb the metal impurities contained in the material (refer to Figure 20 d in the figure is a magnetically adsorbable metal present in the recycled plastic granular material);

[0076] Step 4: When the weight value Y1 monitored by the weighing module 300 reaches the preset weight value X, the pulse gas nozzle 317 sprays an appropriate amount of gas to make the blocking plate 303 vibrate within a certain range, and the material in the weighing hopper 301 is discharged through the opening below it by vibration (when the pulse 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 , at this time the highest air pressure sprayed out of the nozzle is L1);

[0077] Step 5: After the set time (15s in this embodiment), the pulse gas nozzle 317 stops spraying. At this time, the material in the weighing bucket 301 has fallen into the storage tank (No. 1). After waiting for 15s, the blocking plate 303 returns to the predetermined state (refer to Figure 19 ), the electromagnet 307 is powered off, and 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 weighing module 300 is running 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 material in the corresponding storage trough (No. 1) into the predetermined position (refer to Figure 5 If the value of Y1 / Y2 is greater than or equal to 100.05%, it means that the material contains metal impurities;

[0078] Step 6. When the material contains metal impurities, the second conveying module 200 rotates to move a new storage trough (No. 2) to the bottom of the weighing hopper 301, and the pulse gas nozzle 317 is used to blow the sealing plate 303 to vibrate again, so that the metal impurities fall into the storage trough (No. 2) below (the maximum air pressure sprayed by the nozzle is L2 at this time, and L2 should be greater than 1.5 times L1). 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. 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, and the second conveying module 200 is driven to first discharge the metal impurities in the storage trough (No. 2) through the predetermined position (refer to Figure 5 e end in the figure), and then drive the second conveying module 200 to put the material in the corresponding storage tank (No. 1) into the predetermined position (refer to 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 bucket 301;

[0079] Step 7: When there may be material stuck in the weighing hopper 301, the pulse gas nozzle 317 is used to blow the blocking plate 303 greatly (the gas pressure L3 blown out at this time is preferably twice that of L2. This method may shorten the service life of the elastic plate 316, and the blowing time should be shortened appropriately at this time), causing it to vibrate over a large range, thereby shaking off the impurities in the weighing hopper 301. After a predetermined time, the pulse gas nozzle 317 stops blowing, and the weight value Y1 detected by the weighing module 300 is monitored 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 cleared. At this time, the second conveying module 200 is controlled to first discharge the metal impurities in the storage trough (No. 2) through the predetermined position (refer to Figure 5 e end in the figure), and then drive the second conveying module 200 to put the material in the corresponding storage tank (No. 1) into the predetermined position (refer to 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 clogging in the weighing bucket 301. If the value of Y1 / Y2 is greater than or equal to 100.05%, the entire system will stop operating and generate an alarm message that the weighing bucket 301 and the weighing sensor 315 are damaged.

[0080] In this document, relational terms such as first and second, etc., 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. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0081] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A 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 mounted; 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 arranged tilted, and a collecting trough is installed on the upper side of the screening bin, and a first screening net and a second screening net are installed in the screening bin, the first screening net is located above the second screening net, and the mesh number of the first screening net is smaller than that of the second screening net. The internal space of the screening bin is divided into three layers of channels by the first screening net and the second screening net, and a first discharging auger, a second discharging auger and a third discharging auger are installed at the lower end of the screening bin, and the first discharging auger, the second discharging auger and the third discharging auger are respectively connected to one layer of channels, and both ends of the first discharging auger, the second discharging auger and the third discharging auger are respectively provided with a discharging port, one discharging port of each discharging auger is arranged corresponding to the weighing module, and the other discharging port is located outside the bracket; The weighing module includes a weighing bucket, a first support frame and two symmetrically arranged second support frames, a third support frame is installed on one side of the second support frame, a first sensor mounting plate is provided on the third support frame, and a second sensor mounting plate is provided on the weighing bucket. The first sensor mounting plate and the second sensor mounting plate are arranged in a one-to-one correspondence, and a weighing sensor is installed between the corresponding first sensor mounting plate and the second sensor mounting plate; A rotating shaft is installed in the weighing bucket, and a sealing plate is rotatably installed on the rotating shaft. A support plate is fixedly installed on one side of the sealing plate. An elastic plate is installed between one end of the support plate and the weighing bucket. Several windows are opened on the weighing bucket, and several counterweight balls are installed on one end of the sealing plate.

2. The weighing module of the 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 mounted. The first driving roller and the first driven roller are matched with each other and a first conveying belt is mounted. The first conveying belt is provided with a plurality of grooves.

3. The weighing module of the 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, several second driven rollers and several supporting rollers are installed, and a second conveyor belt is installed on the second driving roller, several second driven rollers and several supporting rollers, and a several partitions are installed on the second conveyor belt, and two relatively arranged elastic belts are installed between two adjacent partitions.

4. The weighing module of the feeding device with a sensor weighing structure according to claim 1, characterized in that: A plurality of pulse gas nozzles are mounted on the first support frame. The pulse gas nozzles are arranged opposite to the windows one by one, and the pulse gas nozzles face the side of the blocking plate where the counterweight ball is mounted.

5. The weighing module of the feeding device with a sensor weighing structure according to claim 1, characterized in that: A plurality of electromagnets are mounted on the first support frame, and the electromagnets are arranged opposite to the windows one by one. A plurality of magnets are arranged on the blocking plate, and the magnets are arranged opposite to the electromagnets one by one, and the electromagnets repel each other.

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

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

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

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