A hopper scale sampling system and sampling method

Abstract

This invention discloses a hopper scale sampling system, comprising a hopper scale, a sampling device, a reduction and conveying device, and a packaging device. The reduction and conveying device is located below the sampling device. The sampling device includes a sampling trolley, a track assembly, and a drive assembly for moving the sampling trolley on the track assembly. The material collected in the sampling trolley is fed into the reduction and conveying device, and after being reduced and sampled by the reduction and conveying device, it enters the packaging device. This invention also provides a sampling method for the above-mentioned hopper scale sampling system. The hopper scale sampling system of this invention does not require modification of the belt conveyor, the hopper scale is less prone to blockage, has a simple structure, and provides good sample representativeness. It can be widely used for sampling incoming materials at docks.

Description

Technical Field

[0001] This invention belongs to the field of sampling devices, and particularly relates to a solid sampling system and sampling method. Background Technology

[0002] Currently, most material unloading at docks utilizes grab bucket unloading. After unloading, the grab bucket transfers the material into a hopper scale, where it is weighed and then transferred to a conveyor belt for transport. Regarding this unloading process, when sampling is required, it is currently mostly done using sampling machines mounted on the conveyor belts. These sampling methods include mid-conveyor and head-conveyor sampling. Both methods suffer from spillage and blockage, requiring modifications to the conveyor belts to implement the sampling machines, inevitably impacting future conveyor belt maintenance. Furthermore, current hopper scales also suffer from material accumulation and caking on the upper feed grating, requiring timely cleaning by workers; otherwise, blockages can occur, disrupting normal operations. In addition, current sampling methods mostly involve single-point sampling at a single location, resulting in weak sample representativeness. Summary of the Invention

[0003] The technical problem to be solved by this invention is to overcome the shortcomings and defects mentioned in the background art above, and to provide a hopper scale sampling system and method that does not require modification of the belt conveyor, is less prone to material blockage in the hopper scale, and provides highly representative samples. To solve the above technical problem, the technical solution proposed by this invention is as follows:

[0004] A hopper scale sampling system includes a hopper scale, a sampling device, a reduction and conveying device, and a packaging device. The reduction and conveying device is located below the sampling device. The sampling device includes a sampling trolley, a track assembly, and a drive assembly for moving the sampling trolley on the track assembly. The drive assembly is used to move the sampling trolley at the inlet above the hopper scale to perform lateral cutting and material collection through the cross-section of the incoming material flow, and to move the sampling trolley to the side above the hopper scale and tilt the trolley to pour the collected material into the reduction and conveying device. The collected material is fed into the reduction and conveying device, and after being reduced and sampled by the reduction and conveying device, it enters the packaging device.

[0005] In the above-mentioned hopper scale sampling system, preferably, track assemblies are provided on both sides of the upper part of the hopper scale. Each track assembly includes a straight section and an arc section, with the straight section connecting to the arc section. These are respectively located on both sides of the upper entrance of the hopper scale and on the upper side of the hopper scale. Sampling slots are provided in both the straight and arc sections. The sampling trolley includes a receiving hopper, a connecting plate, and sampling wheels. The receiving hopper is located in the middle of the connecting plate, and the sampling wheels are located at both ends of the connecting plate and engaged in the sampling slots. The connecting plate is positioned close to the grid at the upper entrance of the hopper scale. The connecting plate essentially spans the entire upper entrance of the hopper scale. When the sampling trolley returns to the upper part of the hopper scale after unloading, it can promptly push the accumulated material on the upper part of the grid into the grid gaps and allow it to fall into the hopper, preventing material accumulation and caking that could block the feed grid opening.

[0006] In the above-mentioned hopper scale sampling system, preferably, the driving component includes a traction trolley, a traction rail, and a drive sprocket for driving the traction trolley to move on the traction rail. The drive sprocket includes a chain and a chain drive source. The chain is connected to the traction trolley. The traction rail is provided with a traction slot. The traction wheels of the traction trolley are engaged in the traction slot. The traction trolley is connected to the sampling trolley through a connecting rod. The connection method of the connecting rod when it is connected to the traction trolley and the sampling trolley is hinged.

[0007] In this invention, the chain drive source may include a drive wheel and a driven chain. The traction track and sampling track are stacked and fixed on the frame from bottom to top. The traction wheels of the traction trolley are embedded in traction slots and can roll freely, while the sampling wheels of the sampling trolley are embedded in sampling slots and can roll automatically. The traction trolley is connected to the chain drive source as a whole via a chain, and the chain drive source drives the traction trolley to reciprocate linearly within the traction track via the chain. The connecting rod is hinged to the sampling trolley via a connecting rod hinge, and the traction trolley is hinged to the connecting rod via a connecting rod hinge. The traction trolley can drive the sampling trolley to reciprocate within the sampling track via the connecting rod. One end of the sampling trolley track has an arc-shaped structure. After the chain drive source drives the traction trolley to move to the position of the arc-shaped structure via the chain, the sampling trolley as a whole performs a circular motion along the arc track; this is the unloading action. After the chain drive source reverses its movement, the traction trolley drives the sampling trolley to move in the opposite direction, performing a reverse arc motion on the arc track followed by a linear backward motion on the straight section of the track. With the above structural setup, the sampling trolley can perform sampling, unloading, and return to the top of the hopper scale for material collection and cleaning operations.

[0008] In the aforementioned hopper scale sampling system, preferably, the reducing conveyor device includes a feed chute, a reducing conveyor belt, and a waste conveyor belt. The material collected in the sampling trolley is fed into the inlet of the reducing conveyor belt through the feed chute. A reducing device on the reducing conveyor belt is used to reduce the material for sampling. The outlet of the reducing device is connected to the packaging device. The outlet of the reducing conveyor belt is connected to the waste conveyor belt. The feed chute is equipped with an automatic cleaning component. The lower flange of the feed chute is connected to the inlet of the reducing conveyor belt. The reducing device on the reducing conveyor belt reduces the incoming material for sampling according to a set reduction ratio. The outlet of the reducing device is hinged to the rotating chute. The outlet of the reducing conveyor belt is connected to the inlet of the waste conveyor belt, and the outlet of the waste conveyor belt faces the unloading point.

[0009] In the above-mentioned hopper scale sampling system, preferably, the packaging device includes a rotary chute and a multi-station packaging barrel assembly. The rotary chute is connected to the reducing conveyor device. The discharge end of the rotary chute is oscillatingly positioned above the multi-station packaging barrel assembly. An automatic cleaning component is provided on the rotary chute.

[0010] In the aforementioned hopper scale sampling system, preferably, the rotary chute includes a slewing bearing, a tube body, and a drive pusher assembly for driving the tube body to swing. The upper end of the slewing bearing is connected to the reducing conveyor device, and the lower end of the slewing bearing is connected to the tube body. The drive pusher assembly includes a drive pusher and a drive pusher hinge. The drive pusher is connected to the tube body through the drive pusher hinge, and the extension and retraction of the drive pusher drives the tube body to swing back and forth around the central axis of the slewing bearing. The upper end of the slewing bearing connects to the outlet of the reducing device, and the lower end connects to the tube body. The drive pusher is connected to the tube body through the drive pusher hinge. The extension and retraction of the drive pusher drives the tube body to swing back and forth around the central axis of the slewing bearing. By swinging and moving alternately to move directly above multiple packaging barrel positions, the filling of the packaging barrels can be realized.

[0011] In the aforementioned hopper scale sampling system, preferably, the multi-station packaging barrel assembly includes multiple packaging barrels arranged adjacent to each other. Each packaging barrel is equipped with a rotating lid-opening mechanism. The rotating lid-opening mechanism includes a fixed support, an electromagnetic suction strip, a swing frame, and a lid-opening drive device. The lid-opening drive device is mounted on the fixed support. The swing frame is connected to the lid-opening drive device and swings under its drive. The electromagnetic suction strip is located below the swing frame and is used to attract the lid of the packaging barrel. Simultaneously, the packaging barrel can also be equipped with an electromagnetic induction unlocking box and a card reader. The packaging barrel is positioned on a platform. The rotating lid-opening mechanism consists of a fixed support, an electromagnetic suction strip, a swing frame, and a lid-opening drive device (such as a drive motor). The drive motor is fixed to the fixed support. The swing frame is connected to the drive motor, and an electromagnetic suction strip is installed on the swing frame. When the drive motor rotates, it drives the swing frame to swing back and forth, allowing the electromagnetic suction strip to attract the lid of the packaging barrel, thereby opening or closing the lid.

[0012] In the aforementioned hopper scale sampling system, preferably, the automatic cleaning component includes a high-pressure water nozzle, a flushing water pipe, a high-pressure air nozzle, and a gas pipe. The flushing water pipe is connected to the high-pressure water nozzle, and the high-pressure air nozzle is connected to the gas pipe. The outlets of the high-pressure water nozzle and the high-pressure air nozzle are located on the inner wall of the pipe to be cleaned. This automatic cleaning component facilitates the cleaning of the feed chute and rotary chute. First, water washing is used, followed by high-pressure gas treatment, which effectively cleans the inner walls of the feed chute and rotary chute, preventing the mixing of materials from different batches.

[0013] In the aforementioned hopper scale sampling system, preferably, an incoming material detection device is also included for detecting the position of the incoming material and adjusting the movement path of the sampling trolley. By setting up the incoming material detection device, the position of the incoming material can be detected, thereby adjusting the movement trajectory of the sampling trolley to facilitate material receiving. The specific structure and form of the aforementioned incoming material detection device are not limited, such as using a visual recognition component for identification.

[0014] As a general technical concept, the present invention also provides a sampling method for the above-mentioned hopper scale sampling system, comprising the following steps:

[0015] S1: The incoming material falls from above the hopper scale, and the sampling trolley moves under the drive of the drive assembly to perform transverse cutting and material collection through the cross section of the incoming material flow.

[0016] S2: After the material collection is completed, the sampling trolley is driven by the drive component to move to the side above the hopper scale and tilt the vehicle body to pour the material collected in the sampling trolley into the reducing conveyor device.

[0017] S3: The sampling trolley then returns to the upper entrance of the hopper scale under the drive of the drive component, and moves back and forth at the upper entrance of the hopper scale to clean the residual material on the grid of the hopper scale;

[0018] S4: After the sample-reducing conveying device reduces and samples the incoming material, it enters the packaging device, thus completing the sampling process.

[0019] Material unloading at docks often uses grab buckets, with hopper scales used for weighing and transferring. Sampling machines require modifications to the conveyor belts, inevitably impacting future belt maintenance. Furthermore, current hopper scales suffer from material accumulation and caking at the upper feed grating, requiring regular cleaning to prevent blockages and disruption. This invention automatically samples at the hopper scale's feed end without requiring belt modifications. This not only solves maintenance issues associated with belt sampling but also allows the sampling trolley to reciprocate across the upper grating after sampling and unloading, promptly pushing accumulated material into the grating gaps and into the hopper. This prevents material buildup and caking, effectively addressing the problems of material accumulation and caking at the feed grating. In addition, the present invention is equipped with an automatic cleaning component. After the batch sampling is completed, the automatic cleaning component automatically cleans and blows the internal material channel of the equipment to remove residual materials. This can thoroughly solve the problem of temporary material contamination and avoid material mixing during the next batch sampling operation.

[0020] The hopper scale sampling and preparation system of the present invention mainly consists of incoming material detection, real-time sampling, sample reduction and preparation, and automatic packaging. This system can perform incoming material detection, real-time data acquisition by the hopper scale, on-site real-time sample preparation, and packaging of sampled materials. The specific working process is detailed below:

[0021] The incoming material detection device and sampling device are installed at the upper end of the hopper scale. When the grab bucket unloads material above the hopper scale, the incoming material detection device detects a signal, and the driving component of the sampling device promptly drives the sampling trolley to perform lateral cutting and material collection on the cross-section of the material flow during unloading. This sampling method has strong sample representativeness and better sampling effect compared to sampling from a single location. After material collection, when the sampling trolley moves to one end of the arc section of the track assembly, the entire sampling trolley performs an arc motion to achieve the purpose of unloading the material. After unloading is completed, the sampling trolley is driven in the reverse direction to leave the arc section track, and then the sampling trolley is driven to move back and forth to clean the residual material on the grid of the hopper scale.

[0022] After the sampling trolley pours the collected material into the inlet of the reducing conveyor belt, it drives the belt to move towards the outlet. As the material passes the reducing device, the reducing device intermittently scrapes the material according to the set reduction ratio. The scraped material then enters an already opened packaging barrel through a rotary chute. Before the rotary chute discharges the material, the packaging barrel is identified by a card reader. The intelligent induction unlocking box unlocks the electromagnetic lock on the packaging barrel, and then the rotary opening drive device opens the packaging barrel to facilitate the discharge of material through the rotary chute. After the packaging barrel is weighed full by the bottom weighing platform, the rotary chute swings in the reverse direction to move it away, and the rotary opening drive device closes the lid in the reverse direction, thus completing the sample preparation and packaging operation.

[0023] The remaining material on the shrinking conveyor belt that has not been shrunk and scraped enters the waste material conveyor belt through the discharge port of the shrinking conveyor belt, and is then transported to the outlet for unloading.

[0024] After completing a sampling and preparation process, the automatic cleaning component uses multiple high-pressure water nozzles arranged on the chute inside the equipment to perform high-pressure rinsing on the inner wall of the chute to remove residual materials. After cleaning, multiple high-pressure air nozzles arranged on the chute blow away any remaining water stains. After the process is completed, it waits for the next sampling and preparation process.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] The hopper scale sampling system and method of this invention automatically samples at the feed end of the hopper scale, which not only solves some maintenance problems caused by belt conveyor sampling, but also allows the sampling trolley to laterally cut and collect material from the cross-section of the material flow during unloading. This sampling method has strong representativeness and better sampling effect compared to sampling from a single location. Furthermore, after sampling and unloading, the sampling trolley on the upper part of the hopper scale can reciprocate on the top of the upper grid, promptly pushing accumulated material on the upper part of the grid into the grid gaps and falling into the hopper, preventing material from caking and blocking the feed grid opening. This also effectively solves the problem of residual material accumulation and caking on the feed grid. Overall, the hopper scale sampling system of this invention requires no modification to the belt conveyor, the hopper scale is less prone to clogging, has a simple structure, and provides good sample representativeness, making it widely applicable for sampling incoming materials at docks. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the hopper scale sampling system as an example.

[0029] Figure 2 for Figure 1 Side view.

[0030] Figure 3 This is a schematic diagram of the structure above the hopper scale in the embodiment.

[0031] Figure 4 This is a schematic diagram of the hopper scale in the embodiment (when the sampling trolley is located above the hopper scale).

[0032] Figure 5 for Figure 4 Side view (only the upper structure is shown).

[0033] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0034] Figure 7 This is a schematic diagram of the hopper scale in the embodiment (when the sampling trolley is located above the side of the hopper scale).

[0035] Figure 8 This is a schematic diagram of the reduction conveying device and the packaging device in the embodiment.

[0036] Figure 9 for Figure 8 Side view.

[0037] Figure 10 for Figure 9 A magnified view of a section at point B.

[0038] Figure 11 This is a schematic diagram of the structure of the rotating chute in the embodiment.

[0039] Figure 12 This is a schematic diagram of the structure of the multi-station packaging barrel assembly in the embodiment.

[0040] Figure 13 This is a schematic diagram of the automatic cleaning component in the embodiment. Figure 1 (A magnified view of part C, taking the feed chute as an example).

[0041] Legend:

[0042] 1. Incoming material inspection device; 2. Hopper scale; 21. Grating; 3. Reduction conveyor device; 31. Feed chute; 32. Reduction conveyor belt; 321. Reduction device; 33. Waste material conveyor belt; 4. Sampling device; 41. Sampling trolley; 411. Receiving hopper; 412. Connecting plate; 413. Sampling wheel; 42. Track assembly; 421. Straight section; 422. Curved section; 423. Sampling slot; 43. Drive assembly; 431. Traction trolley; 432. Traction track; 433. Chain; 434. Chain drive source; 435. Traction slot; 43 6. Traction wheel; 437. Connecting rod; 438. Tightening device; 5. Sealing device; 51. Rotary chute; 511. Slewing bearing; 512. Pipe body; 513. Drive push rod; 514. Drive push rod hinge; 52. Multi-station sealing barrel assembly; 521. Sealing barrel; 522. Fixed support; 523. Electromagnetic suction strip; 524. Swing frame; 525. Lid opening drive device; 526. Card reader; 527. Intelligent induction unlocking box; 6. Automatic cleaning assembly; 61. High-pressure water nozzle; 62. Flushing water pipe; 63. High-pressure air nozzle; 64. Gas pipe. Detailed Implementation

[0043] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0044] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0045] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0046] Example:

[0047] like Figure 1 and Figure 2As shown, the hopper scale sampling system of this embodiment includes a hopper scale 2, a sampling device 4, a reduction and conveying device 3, and a packaging device 5. The reduction and conveying device 3 is located below the sampling device 4. The sampling device 4 includes a sampling trolley 41, a track assembly 42, and a drive assembly 43 for driving the sampling trolley 41 to move on the track assembly 42. The drive assembly 43 is used to move the sampling trolley 41 at the entrance above the hopper scale 2 to perform transverse cutting and material collection through the cross section of the incoming material flow (and can reciprocate to clean the accumulated material above the hopper scale 2) and to move the sampling trolley 41 to the side above the hopper scale 2 and tilt the vehicle body to pour the material collected in the sampling trolley 41 into the reduction and conveying device 3. The material collected in the sampling trolley 41 is sent into the reduction and conveying device 3, and after being reduced and sampled by the reduction and conveying device 3, it enters the packaging device 5.

[0048] In this embodiment, it is optional, such as Figures 3-7 As shown, track assemblies 42 are provided on both sides above the hopper scale 2. The track assembly 42 includes a straight section 421 and an arc section 422. The straight section 421 and the arc section 422 are connected and are respectively located on both sides of the upper entrance of the hopper scale 2 and on the upper side of the hopper scale 2. Sampling slots 423 are provided in both the straight section 421 and the arc section 422. The sampling trolley 41 includes a receiving hopper 411, a connecting plate 412 and sampling wheels 413. The receiving hopper 411 is located in the middle of the connecting plate 412. The sampling wheels 413 are respectively located at both ends of the connecting plate 412 and are locked in the sampling slots 423. The connecting plate 412 is set close to the grille 21 at the upper entrance of the hopper scale 2.

[0049] In this embodiment, it is optional, such as Figures 3-7 As shown, the drive assembly 43 includes a traction trolley 431, a traction rail 432, and a drive sprocket for moving the traction trolley 431 on the traction rail 432. The drive sprocket includes a chain 433 and a chain drive source 434. The chain 433 is connected to the traction trolley 431. A tensioning device 438 is provided under the chain 433. A traction slot 435 is provided on the traction rail 432. The traction wheel 436 of the traction trolley 431 is engaged in the traction slot 435. The traction trolley 431 is connected to the sampling trolley 41 through a connecting rod 437. The connection method when the connecting rod 437 is connected to the traction trolley 431 and the sampling trolley 41 is a hinge.

[0050] In this embodiment, it is optional, such as Figures 8-9As shown, the reducing conveyor device 3 includes a feed chute 31, a reducing conveyor belt 32, and a waste conveyor belt 33. The material collected in the sampling trolley 41 is fed into the inlet of the reducing conveyor belt 32 through the feed chute 31. The reducing device 321 on the reducing conveyor belt 32 is used to reduce and sample the material. The outlet of the reducing device 321 is connected to the packaging device 5. The outlet of the reducing conveyor belt 32 is connected to the waste conveyor belt 33. An automatic cleaning component 6 is provided on the feed chute 31.

[0051] In this embodiment, it is optional, such as Figures 8-10 As shown, the packaging device 5 includes a rotary chute 51 and a multi-station packaging barrel assembly 52. ​​The rotary chute 51 is connected to the outlet of the divider 321 of the dividing conveyor 3. The discharge end of the rotary chute 51 is swayably positioned above the multi-station packaging barrel assembly 52. ​​An automatic cleaning assembly 6 is provided on the rotary chute 51.

[0052] In this embodiment, it is optional, such as Figure 11 As shown, the rotary chute 51 includes a slewing bearing 511, a tube body 512, and a drive push rod assembly for driving the tube body 512 to swing. The upper end of the slewing bearing 511 is connected to the outlet of the divider 321 of the dividing conveyor 3, and the lower end of the slewing bearing 511 is connected to the tube body 512. The drive push rod assembly includes a drive push rod 513 and a drive push rod hinge 514. The drive push rod 513 is connected to the tube body 512 through the drive push rod hinge 514, and the extension and retraction of the drive push rod 513 drives the tube body 512 to swing back and forth around the central axis of the slewing bearing 511.

[0053] In this embodiment, it is optional, such as Figure 12 As shown, the multi-station packaging barrel assembly 52 includes multiple packaging barrels 521 (two are not shown in the figure). The multiple packaging barrels 521 are arranged adjacent to each other. The packaging barrels 521 are provided with a rotating opening mechanism. The rotating opening mechanism includes a fixed support 522, an electromagnetic suction strip 523, a swing frame 524 and an opening drive device 525. The opening drive device 525 is located on the fixed support 522. The swing frame 524 is connected to the opening drive device 525 and swings under the drive of the opening drive device 525. The electromagnetic suction strip 523 is located below the swing frame 524 and is used to attract the lid of the packaging barrel 521.

[0054] In this embodiment, it is optional, such as Figure 13 As shown, the automatic cleaning assembly 6 includes a high-pressure water nozzle 61, a flushing water pipe 62, a high-pressure air nozzle 63, and a gas pipe 64. The flushing water pipe 62 is connected to the high-pressure water nozzle 61, and the high-pressure air nozzle 63 is connected to the gas pipe 64. The outlets of the high-pressure water nozzle 61 and the high-pressure air nozzle 63 are located on the inner wall of the pipes to be cleaned (feed chute 31 and rotary chute 51).

[0055] In this embodiment, it is optional, such as Figure 1 As shown, it also includes an incoming material detection device 1 for detecting the incoming material position and adjusting the movement path of the sampling trolley 41. The specific structure of the aforementioned incoming material detection device 1 is not limited, such as using a visual recognition mechanism to guide the movement path of the sampling trolley 41.

[0056] This embodiment also provides a sampling method for the above-mentioned hopper scale sampling system, including the following steps:

[0057] S1: The incoming material falls from above the hopper scale 2, and the sampling trolley 41 moves under the drive of the drive component 43 to perform transverse cutting and material collection through the cross section of the incoming material flow.

[0058] S2: After the material collection is completed, the sampling trolley 41 moves to the side above the hopper scale 2 under the drive of the drive component 43 and tilts the body to pour the material collected in the sampling trolley 41 into the reducing conveyor device 3.

[0059] S3: The sampling trolley 41 then returns to the upper entrance of the hopper scale 2 under the drive of the drive component 43, and moves back and forth at the upper entrance of the hopper scale 2 to clean the residual material on the grid 21 of the hopper scale 2.

[0060] S4: After the reducing and sampling device 3 reduces the incoming material, it enters the packaging device 5, thus completing the sampling and preparation.

[0061] The hopper scale sampling and preparation system in this embodiment mainly consists of incoming material inspection, real-time sampling, sample reduction and preparation, and automatic packaging. This system can perform incoming material inspection, real-time data acquisition, on-site real-time sample preparation, and sampled material packaging. The specific working process is detailed below:

[0062] The incoming material detection device 1 and the sampling device 4 are installed at the upper end of the hopper scale 2. When the grab bucket unloads material above the hopper scale 2, the incoming material detection device 1 detects the signal, and the drive component 43 of the sampling device 4 promptly drives the sampling trolley 41 to perform transverse cutting and material collection on the cross-section of the material flow during unloading. This sampling method has strong sampling representativeness and better sampling effect compared to sampling from a single location. After material collection, when the sampling trolley 41 moves to one end of the arc section 422 of the track component 42, the sampling trolley 41 performs a circular arc movement to achieve the purpose of unloading material. After unloading is completed, the sampling trolley 41 is driven in the reverse direction to leave the arc section 422 track, and then the sampling trolley 41 is driven to move back and forth to clean the residual material on the grid 21 of the hopper scale 2.

[0063] The sampling trolley 41 pours the collected material into the inlet of the reducing conveyor belt 32, and then drives the belt to move towards the outlet. When passing the reducing device 321, the reducing device 321 intermittently scrapes the material according to the set reducing ratio. The material obtained by the reducing and scraping enters the already opened packaging barrel 521 through the rotary chute 51. Before the material is discharged from the rotary chute 51, the packaging barrel 521 is identified by the card reader 526. The intelligent induction unlocking box 527 unlocks the electromagnetic lock on the packaging barrel 521, and then the rotary opening drive device 525 opens the packaging barrel 521 to cooperate with the rotary chute 51 to discharge the material. After the packaging barrel 521 is full by the bottom weighing platform, the rotary chute 51 swings in the opposite direction to move away, and the rotary opening drive device 525 closes the lid in the opposite direction, thus completing the sample preparation and packaging operation.

[0064] The remaining material on the shrinking conveyor belt 32 that has not been shrunk and scraped enters the waste material conveyor belt 33 through the discharge port of the shrinking conveyor belt 32, and is then transported to the outlet by the waste material conveyor belt 33 for unloading.

[0065] After completing a sampling and preparation process, the automatic cleaning component 6 uses multiple high-pressure water nozzles 61 arranged on the inside of the chute to perform high-pressure flushing on the inner wall of the chute to remove residual materials. After cleaning, multiple high-pressure air nozzles 63 arranged on the chute blow away any remaining water stains. After the process is completed, the system waits for the next sampling and preparation process.

Claims

1. A hopper scale sampling system, characterized in that, The device includes a hopper scale (2), a sampling device (4), a reduction conveying device (3), and a packaging device (5). The reduction conveying device (3) is located below the sampling device (4). The sampling device (4) includes a sampling trolley (41), a track assembly (42), and a drive assembly (43) for driving the sampling trolley (41) to move on the track assembly (42). The drive assembly (43) is used to move the sampling trolley (41) at the entrance above the hopper scale (2) to perform transverse cutting and material collection through the cross section of the incoming material flow and to move the sampling trolley (41) to the side above the hopper scale (2) and tilt the vehicle body to pour the material collected in the sampling trolley (41) into the reduction conveying device (3). The material collected in the sampling trolley (41) is sent into the reduction conveying device (3), and after being reduced and sampled by the reduction conveying device (3), it enters the packaging device (5). The hopper scale (2) is provided with track assemblies (42) on both sides above. The track assembly (42) includes a straight section (421) and an arc section (422). The straight section (421) and the arc section (422) are connected and respectively located on both sides of the entrance above the hopper scale (2) and above the side of the hopper scale (2). The straight section (421) and the arc section (422) are provided with sampling slots (423). The sampling trolley (41) includes a receiving hopper (411), a connecting plate (412) and sampling wheels (413). The receiving hopper (411) is located in the middle of the connecting plate (412). The sampling wheels (413) are respectively located at both ends of the connecting plate (412) and are locked in the sampling slots (423). The connecting plate (412) is set close to the grid (21) at the entrance above the hopper scale (2).

2. The hopper scale sampling system according to claim 1, characterized in that, The drive assembly (43) includes a traction trolley (431), a traction rail (432), and a drive sprocket for moving the traction trolley (431) on the traction rail (432). The drive sprocket includes a chain (433) and a chain drive source (434). The chain (433) is connected to the traction trolley (431). The traction rail (432) is provided with a traction slot (435). The traction wheels (436) of the traction trolley (431) are engaged in the traction slot (435). The traction trolley (431) is connected to the sampling trolley (41) through a connecting rod (437). The connection method of the connecting rod (437) when it is connected to the traction trolley (431) and the sampling trolley (41) is a hinge.

3. The hopper scale sampling system according to claim 1, characterized in that, The reducing conveyor device (3) includes a feed chute (31), a reducing conveyor belt (32), and a waste conveyor belt (33). The material collected in the sampling trolley (41) is fed into the inlet of the reducing conveyor belt (32) through the feed chute (31). The reducing device (321) on the reducing conveyor belt (32) is used to reduce and sample the material. The outlet of the reducing device (321) is connected to the packaging device (5). The outlet of the reducing conveyor belt (32) is connected to the waste conveyor belt (33). An automatic cleaning component (6) is provided on the feed chute (31).

4. The hopper scale sampling system according to claim 1, characterized in that, The packaging device (5) includes a rotary chute (51) and a multi-station packaging barrel assembly (52). The rotary chute (51) is connected to the shrink conveying device (3). The discharge end of the rotary chute (51) is swayably positioned above the multi-station packaging barrel assembly (52). An automatic cleaning assembly (6) is provided on the rotary chute (51).

5. The hopper scale sampling system according to claim 4, characterized in that, The rotary chute (51) includes a slewing bearing (511), a tube body (512), and a drive push rod assembly for driving the tube body (512) to swing. The upper end of the slewing bearing (511) is connected to the reducing conveying device (3), and the lower end of the slewing bearing (511) is connected to the tube body (512). The drive push rod assembly includes a drive push rod (513) and a drive push rod hinge (514). The drive push rod (513) is connected to the tube body (512) through the drive push rod hinge (514), and the extension and retraction of the drive push rod (513) drives the tube body (512) to swing back and forth around the central axis of the slewing bearing (511).

6. The hopper scale sampling system according to claim 4, characterized in that, The multi-station packaging barrel assembly (52) includes multiple packaging barrels (521), which are arranged adjacent to each other. Each packaging barrel (521) is provided with a rotating opening mechanism. The rotating opening mechanism includes a fixed support (522), an electromagnetic suction strip (523), a swing frame (524), and an opening drive device (525). The opening drive device (525) is located on the fixed support (522). The swing frame (524) is connected to the opening drive device (525) and swings under the drive of the opening drive device (525). The electromagnetic suction strip (523) is located below the swing frame (524) and is used to attract the lid of the packaging barrel (521).

7. The hopper scale sampling system according to any one of claims 3-6, characterized in that, The automatic cleaning assembly (6) includes a high-pressure water nozzle (61), a flushing water pipe (62), a high-pressure air nozzle (63), and a gas pipe (64). The flushing water pipe (62) is connected to the high-pressure water nozzle (61), and the high-pressure air nozzle (63) is connected to the gas pipe (64). The outlets of the high-pressure water nozzle (61) and the high-pressure air nozzle (63) are located on the inner wall of the pipe to be cleaned.

8. The hopper scale sampling system according to any one of claims 1-6, characterized in that, It also includes an incoming material detection device (1) for detecting the incoming material position and adjusting the movement path of the sampling trolley (41).

9. A sampling method for a hopper scale sampling system as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: The incoming material falls from above the hopper scale (2), and the sampling trolley (41) moves under the drive of the drive assembly (43) to perform transverse cutting and material collection through the cross section of the incoming material flow; S2: After the material collection is completed, the sampling trolley (41) moves to the side above the hopper scale (2) under the drive of the drive component (43) and tilts the vehicle body to pour the material collected in the sampling trolley (41) into the reducing conveyor (3). S3: The sampling trolley (41) then returns to the upper entrance of the hopper scale (2) under the drive of the drive component (43) and moves back and forth at the upper entrance of the hopper scale (2) to clean the residual material on the grid (21) of the hopper scale (2); S4: After the material is shrunk and sampled by the shrunk conveying device (3), it enters the packaging device (5) to complete the sampling.

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