A material weighing device

Abstract

The utility model provides a kind of material weighing device, it includes discharging bin, collection chute and the several groups of feeding weighing mechanism being arranged between discharging bin and collection chute, each group of feeding weighing mechanism includes the screw rod and round pipe combination conveying component being arranged in the discharge port of discharging bin, the discharge port below screw rod and round pipe combination conveying component is set up metering hopper component, the discharge port below metering hopper component is set up collection chute;Screw rod and round pipe combination conveying component include round pipe and the first helical propulsion mechanism of feeding to round pipe inside.This utility model solves the problem of how to improve the feeding speed and accuracy of material weighing device in the process of weighing the material with viscosity and / or powder and / or ultra-light specific gravity (specific gravity <0.5) in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of weighing and packaging equipment, and in particular to a material weighing device. Background Technology

[0002] In the field of weighing and packaging equipment technology, for automatic feeding and weighing devices for small-sized, poorly flowing powder or granular materials (for materials with a single package weight of 0-300 grams), traditional structures and methods such as vibrator feeding, gravity feeding, single screw feeding, or single round tube feeding are usually adopted between the hopper and the weighing component (including the metering hopper).

[0003] Gravity feeding is not conducive to uniform and orderly feeding; vibratory feeding results in significant overall vibration and noise, affecting the operating environment; single-tube or single-screw feeding is slow and lacks precision.

[0004] Therefore, in the weighing process of viscous and / or powdery and / or ultralight materials (specific gravity < 0.5), the challenge of improving the feeding speed and accuracy of the material weighing device has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a material weighing device, which mainly solves the problem of how to improve the feeding speed and accuracy of weighing devices for viscous, powder, and ultra-light specific gravity (specific gravity < 0.5) materials in the above-mentioned prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a material weighing device, which includes a feeding bin, a collecting chute, and several sets of feeding and weighing mechanisms arranged between the feeding bin and the collecting chute, characterized in that: each set of feeding and weighing mechanisms includes a screw and round tube combined conveying assembly arranged at the discharge port of the feeding bin, a metering hopper assembly arranged below the discharge port of the screw and round tube combined conveying assembly, and a collecting chute arranged below the discharge port of the metering hopper assembly;

[0007] The screw and tube combined conveying assembly includes a tube and a first screw propulsion mechanism for feeding material into the tube.

[0008] Furthermore, the circular tube is driven to rotate by the circular tube drive assembly; the first spiral propulsion mechanism includes a screw drive assembly connected to a screw, and the screw is provided with spiral blades for feeding material into the circular tube.

[0009] Furthermore, multiple sets of screw and tube combined conveying assemblies are arranged in parallel;

[0010] In each screw and tube combination conveying assembly, the direction of rotation of the tube is opposite to the direction of rotation of the screw inside it;

[0011] And / or the spiral direction of the circular tube in the adjacent screw and circular tube combined conveying assembly is opposite;

[0012] And / or in the screw and tube combination conveying assembly located on both sides, the tube is rotated inward.

[0013] Furthermore, the feeding bin is provided with a first connection port for connecting round pipes and an opening for extending the corresponding screw and spiral blade into the feeding bin on both sides;

[0014] The bottom of the first connection port is provided with a discharge hole.

[0015] Furthermore, the feeding bin is equipped with at least two long screws connected and driven by a second spiral propulsion mechanism, and the long screws are equipped with large rotating blades.

[0016] Furthermore, the measuring hopper assembly includes a first housing and a measuring hopper. The first housing is equipped with a lever drive assembly and a weighing device. The measuring hopper includes a lever for controlling the opening and closing of the hopper gate. The movable end of the lever drive assembly passes through the first housing and controls the operation of the lever. The weighing device is connected to a hook, which is detachably connected to the measuring hopper.

[0017] Furthermore, the material weighing device includes a control cabinet and several base assemblies. The feeding bin of each feeding and weighing mechanism is connected to the base assembly, and the base assembly is fixed to the top surface of the control cabinet. The control cabinet has a hollow section in the middle, which is connected to the collection chute.

[0018] Furthermore, a feeding hopper is provided on top of the unloading hopper;

[0019] The top of the control cabinet is provided with a first dust cover for covering the feeding hopper, unloading hopper, feeding and weighing mechanism, metering hopper assembly and base assembly. The first dust cover is provided with a second connection port for connecting the dust extraction device and a feeding port for feeding material into the feeding hopper.

[0020] Furthermore, the material weighing device includes a discharge assembly installed at the outlet of the collection chute. The discharge assembly is connected to the control cabinet via a mounting bracket, and a collection hopper is provided below the discharge assembly.

[0021] The discharge assembly is surrounded by a second dust cover, which has an air inlet and an exhaust outlet.

[0022] Furthermore, the material weighing device also includes an operation panel connected to the mounting frame;

[0023] The first dust cover is made of transparent material;

[0024] The second dust cover is made of transparent material;

[0025] The feeding hopper and the discharging hopper are detachably connected; the discharging hopper is detachably connected to the long screw, the screw and the round tube; the collecting chute and the control cabinet are detachably connected; the discharge assembly and the collecting hopper are detachably connected to the mounting frame.

[0026] In view of the above technical features, the present invention has the following beneficial effects:

[0027] 1. This utility model discloses a material weighing device. The feeding and weighing mechanism conveys materials through a combination of a screw and a circular tube conveying assembly (i.e., a combination of screw and circular tube rotation). By matching the operating speeds of the screw and the circular tube, it achieves wide material coverage, high feeding efficiency, and good accuracy. In the weighing process of viscous and / or powdery and / or ultra-lightweight materials (specific gravity < 0.5), it solves the problem of how to improve the feeding speed and accuracy of the material weighing device.

[0028] 2. The material weighing device of this utility model combines a weighing device with a "weighing" function and a "weighing hopper drive" lever drive assembly into a first housing to form a drive unit. It is waterproof, easy to clean, has good structural rigidity, and can guarantee weighing accuracy.

[0029] 3. The material weighing device of this utility model has four channels (i.e., circular tube + metering hopper assembly) as a group of "feeding + metering" units in each feeding hopper. One device can be configured with multiple groups of "feeding + metering" units, which can be matched with the mixed production of various materials, that is, to realize the mixing and blending of materials.

[0030] 4. The material weighing device of this utility model can effectively prevent dust from overflowing through the first dust cover and the second dust cover, making the production environment friendly.

[0031] 5. The material weighing device of this utility model allows for quick disassembly of all parts that come into contact with the material, making maintenance convenient. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a material weighing device in specific embodiment 1. Figure 1 .

[0033] Figure 2 This is a schematic diagram of the structure of a material weighing device in specific embodiment 1. Figure 2 .

[0034] Figure 3 This is a schematic diagram of the structure of a material weighing device in specific embodiment 1. Figure 3 .

[0035] Figure 4 This is a schematic diagram of the structure of a material weighing device in specific embodiment 1. Figure 4 .

[0036] Figure 5 This is a schematic diagram of the feeding hopper in specific embodiment 1.

[0037] Figure 6 This is a schematic diagram of the material feeding hopper in specific embodiment 1.

[0038] Figure 7 This is a schematic diagram of the circular tube drive assembly in specific embodiment 1.

[0039] Figure 8 This is a schematic diagram of the second spiral propulsion mechanism in specific embodiment 1.

[0040] Figure 9 This is a schematic diagram of the circular tube in specific embodiment 1.

[0041] Figure 10 This is a schematic diagram of the screw drive assembly in the first helical propulsion mechanism of specific embodiment 1.

[0042] Figure 11 This is a schematic diagram of the screw in the first spiral propulsion mechanism in specific embodiment 1.

[0043] Figure 12 This is a schematic diagram of the base assembly in specific embodiment 1.

[0044] Figure 13 This is a schematic diagram of the structure of the first housing and hook in the metering hopper assembly in specific embodiment 1.

[0045] Figure 14 This is a schematic diagram of the structure of the measuring hopper and the frame in the measuring hopper assembly of specific embodiment 1. Figure 1 .

[0046] Figure 15 This is a schematic diagram of the structure of the measuring hopper and the frame in the measuring hopper assembly of specific embodiment 1. Figure 2 .

[0047] Figure 16 This is a schematic diagram of the structure of the measuring hopper and the frame in the measuring hopper assembly of specific embodiment 1. Figure 3 .

[0048] Figure 17 This is a schematic diagram of the structure of the measuring hopper and the frame in the measuring hopper assembly of specific embodiment 1. Figure 4 .

[0049] Figure 18 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 1 .

[0050] Figure 19 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 2 .

[0051] Figure 20 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 2 .

[0052] Figure 21 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 3 .

[0053] Figure 22 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 4 .

[0054] Figure 23 This is a schematic diagram of the frame structure in the metering hopper assembly of specific embodiment 1. Figure 5 .

[0055] Figure 24 This is a schematic diagram of the control cabinet in specific embodiment 1.

[0056] Figure 25 This is a schematic diagram of the collection chute structure in specific embodiment 1.

[0057] Figure 26 This is a schematic diagram of the material discharge assembly in specific embodiment 1.

[0058] Figure 27 This is a schematic diagram of the structure of a material weighing device in specific embodiment 1. Figure 5 (Protect the first dust cover).

[0059] Figure 28 This is a schematic diagram showing the rotation direction of the circular tube and the screw in specific embodiment 1.

[0060] In the diagram: 1. Feeding hopper;

[0061] 2. Feeding bin; 210. First connection port; 211. Discharge hole; 220. Opening; 230. Second screw propulsion mechanism; 231. Second rotary motor; 232. Second driving wheel; 233. Second driven wheel A; 234. Second driven wheel B; 240. Long screw; 241. Large spiral blade;

[0062] 3. Feeding and weighing mechanism; 310. Screw and round tube combined conveying assembly; 311. Round tube; 312. Round tube drive assembly; 313. Gear part of the third drive wheel; 314. Third gear part; 315. Third rotary motor; 320. First screw propulsion mechanism; 321. Screw drive assembly; 322. Screw; 323. Spiral blade;

[0063] 4. Measuring hopper assembly; 400. Measuring hopper; 401. Hopper body; 402. Front closing door; 403. Rear closing door;

[0064] 410. First housing; 420. Lever drive assembly; 430. Hook;

[0065] 420. Frame; 421. Hanging rod; 422. Lever; 423. First connecting piece; 424. Second connecting piece; 425. Third connecting piece; 426. Fourth connecting piece; 427. Fifth connecting piece; 428. Sixth connecting piece; 429. First hinge piece; 430. Second hinge piece; 431. First fixing pin; 432. Second fixing pin; 433. Third fixing pin; 434. Fourth fixing pin; 435. Fifth fixing pin; 436. Sixth fixing pin; 437. Spring; 438. First connecting rod; 439. Second connecting rod;

[0066] 5. Base assembly;

[0067] 6. Control cabinet; 610. Cutout section; 620. Stepped section; 630. Limiting section;

[0068] 7. First dust cover; 710. Second connection port; 720. Feed port;

[0069] 8. Collection chute;

[0070] 9. Discharge assembly; 910. Mounting frame; 911. Control panel; 920. Second dust cover; 921. Air inlet; 922. Exhaust outlet; 930. Collection hopper. Detailed Implementation

[0071] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0072] See Figures 1 to 28 In specific embodiment 1, this embodiment 1 provides a material weighing device, which includes a feeding bin 2, a collecting chute 8 and several sets of feeding and weighing mechanisms 3 arranged between the feeding bin 2 and the collecting chute 8. Each set of feeding and weighing mechanisms 3 includes a screw and round tube combined conveying assembly 310 arranged at the discharge port of the feeding bin 2. A metering hopper assembly 4 is arranged below the discharge port of the screw and round tube combined conveying assembly 310, and a collecting chute 8 is arranged below the discharge port of the metering hopper assembly 4.

[0073] The screw and tube combined conveying assembly 310 includes a tube 311 and a first screw propulsion mechanism 320 for feeding material into the tube 311.

[0074] The circular tube 311 is driven to rotate by the circular tube drive assembly 312. The circular tube drive assembly 312 may be a third rotary motor 315. The drive end of the third rotary motor 315 is connected to the third drive wheel. The outer wall of the circular tube 311 is provided with a third gear part 314. The gear part 313 of the third drive wheel and the third gear part 314 are matched. The third rotary motor 315 indirectly drives the circular tube 311 to achieve circumferential rotation.

[0075] The first spiral propulsion mechanism 320 includes a screw drive assembly 321, which is connected to a screw 322. The screw 322 is equipped with a spiral blade 323 for feeding material into the circular tube 311. For example, the screw drive assembly 321 includes a first rotary motor, the drive end of which is connected to the end of the screw 322, driving the screw 322 to rotate. The rotation of the screw 322 drives the spiral blade 323 to rotate. During the rotation of the spiral blade 323, the material in the feeding bin 2 is pushed into the circular tube 311, and / or the material in the circular tube 311 is pushed forward until it falls into the metering hopper 400 of the metering hopper assembly 4, thus realizing the feeding operation of the metering hopper assembly 4. The material is conveyed by the combined rotation of the screw 322 and the circular tube 311, which has high feeding efficiency and good accuracy.

[0076] Multiple sets of screw and round tube combined conveying components 310 are arranged in parallel, and multiple sets are fed synchronously, which further improves the overall feeding speed of the material weighing device.

[0077] In each screw and tube combined conveying assembly 310, the rotation direction of the tube 311 is opposite to that of the screw 322 inside. This allows the screw 322 to both convey materials into the tube 311 and push the materials inside the tube 311 forward. Because the rotation directions are opposite, the spiral blades 323 of the screw 322 can also scrape off the accumulated materials on the inner wall of the tube 311, resulting in better material dispersion and preventing material accumulation (especially sticky materials and powders). This pushes the materials out of the tube 311 as much as possible, ensuring the conveying speed of the materials inside the tube 311 and maintaining stable and efficient material conveying.

[0078] Preferably, the rotation directions of the circular tubes 311 in the adjacent screw and circular tube combined conveying assembly 310 are opposite, so that the material weighing device as a whole can feed the material evenly.

[0079] Preferably, in the screw and tube combination conveying assembly 310 located on both sides, the tube 311 is rotated inward to prevent the material from being rotated out or thrown out of the material weighing device, and to ensure that the material falls into the collection chute.

[0080] The feeding bin 2 is provided with a first connection port 210 for connecting the round tube 311 and an opening 220 for extending the corresponding screw 322 and spiral blade 323 into the feeding bin 2 on both sides. The bottom end of the first connection port 210 is provided with a discharge hole 211. When the material is embedded in the gap between the round tube 311 and the first connection port 210, the material in the gap is discharged through the discharge hole 211 to avoid the accumulation of material affecting the rotation of the round tube 311.

[0081] At least two long screws 240 connected and driven by the second spiral propulsion mechanism 230 are installed in the feeding bin 2. The long screws 240 are located in the feeding bin 2 and are equipped with large spiral blades 241. The second spiral propulsion mechanism 230 includes a second rotary motor 231. The drive end of the second rotary motor 231 is connected to a second driving wheel 232. The second driven wheel A233 and the second driven wheel B234 are respectively connected to the ends of a long screw 240. The gear parts of the second driving wheel 232 and the second driven wheel A233 mesh with each other. The gear parts of the second driven wheel A233 and the second driven wheel B234 mesh with each other. The second rotary motor 231 indirectly drives the long screw 240 to rotate. The long screw 240 drives the large spiral blade 241 to rotate. The large spiral blade 241 pushes the material in the feeding bin 2 to spread more evenly, and evenly fills the feeding bin 2 with the material, so that the material in the feeding bin 2 can enter each circular tube 311 more evenly.

[0082] The weighing hopper assembly 4 includes a first housing 410 and a weighing hopper 400. The first housing 410 houses a lever drive assembly 420 and a weighing device. The weighing hopper 400 includes a lever 422 for controlling the opening and closing of the hopper gate. The movable end of the lever drive assembly 420 passes through the first housing 410 and controls the operation of the lever 422. The weighing device is connected to a hook 430, which is detachably connected to the weighing hopper 400. The first housing 410 combines the "weighing" function of the weighing device and the "weighing hopper 400 driving" function of the lever drive assembly 420 into a single "drive unit." Due to the presence of the first housing 410 and the detachable connection of the hook 430 to the weighing hopper 400, the weighing device and the lever drive assembly 420 are waterproof and easy to clean. The components have good structural rigidity, ensuring the accuracy of material weighing within the weighing hopper 400.

[0083] The measuring hopper 400 includes a hopper body 401 and a frame 420. The hopper body 401 is connected to the frame 420, and the frame 420 is connected to a hanging rod 421. The hanging rod 421 is embedded in a hook 430, so that the hook 430 can be detachably connected to the measuring hopper 400. The frame 420 fixes a first connecting piece 423 with a first fixing pin 431. The first connecting piece 423 is connected to a second connecting piece 424 with a first hinge piece 429. The second connecting piece 424 and one side of the rear closing door 403 are connected to one side of the frame 420 with a second fixing pin 432. A fifth connecting piece 427 and one side of the front closing door 402 are connected to one side of the frame 420 with a third fixing pin 433.

[0084] The third connecting piece 425 and the other side of the rear closing door 403 are connected to the other side of the frame 420 by the fourth fixing pin 434. A first connecting rod 438 is provided between the second connecting piece 424 and the third connecting piece 425. The third connecting piece 425 is connected to the fourth connecting piece 426 by the second hinge piece 430. The fourth connecting piece 426 and the other side of the front closing door 402 are connected to the other side of the frame 420 by the fifth fixing pin 435. A second connecting rod 439 is provided between the fifth connecting piece 427 and the fourth connecting piece 426.

[0085] The first connecting piece 423 connects to one end of the lever 422, the other end of the lever 422 connects to one end of the spring 437, and the other end of the spring 437 connects to the frame 420. The other end of the lever 422 connects to the sixth connecting piece 428, and the sixth connecting piece 428 is connected to the frame 420 through the sixth fixing pin 436.

[0086] When the lever drive assembly 420 drives the lever 422 to rotate upward, the lever 422 drives the first connecting piece 423 and the sixth connecting piece 428 to rotate upward. The first connecting piece 423 pulls up the first hinge piece 429, and the first hinge piece 429 pulls up the second connecting piece 424. The second connecting piece 424 drives the third connecting piece 425 to move upward synchronously through the first connecting rod 438. The second connecting piece 424 is connected to one side of the rear closing door 403, and the third connecting piece 425 is connected to the other side of the rear closing door 403. The second connecting piece 424 and the third connecting piece 425 together drive the rear closing piece to move upward along the axis formed by the connection of the second fixing pin 432 and the fourth fixing pin 434. Simultaneously, the third connecting piece 425 pulls the second hinge piece 430, the second hinge piece 430 pushes the fourth connecting piece 426, and the fourth connecting piece 426 drives the fifth connecting piece 427 to move synchronously through the second connecting rod 439. The fifth connecting piece 427 is connected to one side of the front closing door 402, and the fourth connecting piece 426 is connected to the other side of the front closing door 402. The fifth connecting piece 427 and the fourth connecting piece 426 together drive the front closing piece to rotate forward along the axis formed by the connection of the third fixing pin 433 and the fifth fixing pin 435, so that the front closing door 402 and the rear closing door 403 can be opened outward, so that the material in the bucket 401 can fall into the collection chute 8. Conversely, when the lever drive assembly 420 returns to its original position, the lever 422 rotates downward and returns to its original position under the action of the spring 437, finally realizing the rear door 402 rotating backward and the rear door 403 rotating forward, thus realizing the inward closing of the front door 402 and the rear door 403.

[0087] Before the lever drive assembly 420 drives the lever 422 to rotate upward, the material falls into the hopper 401. The hopper 401 is indirectly connected to the weighing device (such as a weighing sensor) in the first housing 410 through the frame 420, hanging rod 421, and hook 430. The weighing device accurately measures the weight of the material in the hopper 401.

[0088] The material weighing device includes a control cabinet 6 and several base assemblies 5. The feeding bin 2 of each feeding weighing mechanism 3 is connected to the base assembly 5, which is fixed to the top surface of the control cabinet 6. The control cabinet 6 has a hollow section 610 in the middle, which connects to the collecting chute 8. For example, the hollow section 610 in the control cabinet 6 has an inwardly extending step 620, and the top of the collecting chute 8 connects to the step 620 of the hollow section 610 in the control cabinet 6. The control cabinet 6 houses various electrical circuits, achieving integrated wiring and saving wires, making the material weighing device look neat and integrated, and facilitating the overall movement and transportation of the material weighing device. A limiting part 630 is provided on the top of the control cabinet 6 corresponding to the edge of the hollow section 610. The limiting part 630 is used to limit the base assembly 5 and prevent it from moving into the hollow section 610.

[0089] The top of the unloading bin 2 is equipped with the loading bin 1, and the material in the loading bin 1 falls into the unloading bin 2.

[0090] The top of the control cabinet 6 is provided with a first dust cover 7 for covering the feeding bin 1, the unloading bin 2, the feeding and weighing mechanism 3, the metering hopper assembly 4, and the base assembly 5. The first dust cover 7 is provided with a second connection port 710 for connecting the dust extraction device and a feeding port 720 for feeding material into the feeding bin 1.

[0091] The material weighing device includes a discharge assembly 9 installed at the outlet of the collection chute 8. The discharge assembly 9 is connected to the control cabinet 6 via a mounting bracket 910. A collection hopper 930 is provided below the discharge assembly 9. A second dust cover 920 is provided around the discharge assembly 9. The second dust cover 920 is provided with an air inlet 921 and an exhaust outlet 922.

[0092] The first dust cover 7 and the second dust cover 920, together with the control cabinet 6, completely enclose the material weighing device, preventing material dust from spreading into the air, ensuring a clean production environment, avoiding harm to the health of operators, and creating a friendly production environment. For example, the first dust cover 7 and the second dust cover 920, together with the control cabinet 6, form a sealing structure with an IP65 rating specifically designed for powders.

[0093] The material weighing device also includes an operation panel 911 connected to the mounting frame 910.

[0094] The first dust cover 7 is made of transparent material, and the second dust cover 920 is made of transparent material, making it easy to observe the operation of the components inside the dust cover.

[0095] The feeding hopper 1 and the discharging hopper 2 are detachably connected; the discharging hopper 2 is detachably connected to the long screw 240, screw 322 and round tube 311; the metering hopper 400 and the first housing 410 are detachably connected (i.e. the hook 430 is detachably connected to the metering hopper 400); the collecting chute 8 and the control cabinet 6 are detachably connected; the discharge assembly 9 and the collecting hopper 930 are detachably connected to the mounting frame 910. In other words, all parts that come into contact with materials can be quickly disassembled, making maintenance convenient.

[0096] In this embodiment 1, a material weighing device is provided with four feeding bins 1, each feeding bin 1 connected to a discharging bin 2 at its bottom. Each discharging bin 2 corresponds to four sets of feeding and weighing mechanisms 3 (each set of feeding and weighing mechanisms 3 forms a feeding + metering unit with four channels as a group, and each channel corresponds to a set of screw and round tube combined conveying components 310). The four sets of feeding and weighing mechanisms 3 are installed in pairs opposite each other in the hollow part 610 in the middle of the control cabinet 6. The metering hopper 400 of every two sets of feeding and weighing mechanisms 3 corresponds to a collecting chute 8 in the hollow part 610. Each collecting chute 8 corresponds to a set of discharging components 9, and each set of discharging components 9 corresponds to a collecting hopper 930. The four feeding bins 1 can realize the mixed production operation of different types of materials, and the overall layout of the material weighing device saves space. Each channel corresponds to a set of "feeding + metering" units, and one material weighing device can be configured with multiple sets of "feeding + metering" units, which can match the mixed production of multiple materials and realize mixed material blending.

[0097] Material enters the discharge bin 2 through the feeding bin 1. The second spiral propulsion mechanism 230 of the discharge bin 2 drives the long screw 240 to rotate the large spiral blade 241, thus ensuring that the material evenly fills the entire discharge bin 2. Then, the screw and round tube combined conveying assembly 310 in the feeding and weighing mechanism 3 operates. The screw drive assembly 321 of the first spiral propulsion mechanism 320 drives the screw 322 to rotate. The screw 322 drives the spiral blade 323 to rotate, so that the material in the discharge bin 2 is conveyed into the round tube 311 at a set speed. At the same time, the round tube drive assembly 312 drives the round tube 311 to rotate circumferentially. The spiral blade 323 of the screw 322 and the round tube 311 work together to convey the material in the round tube 311 forward and fall into the metering hopper 400. The weighing hopper 400 and the material inside it are weighed in real time by the weighing device inside the first housing 410. After the target weight is reached, the screw and round tube combined conveying assembly 310 stops working, and the material in the round tube 311 stops being fed into the weighing hopper 400. The lever drive assembly 420 inside the first housing 410 controls the front closing door 402 and the rear closing door 403 of the weighing hopper 400 to open and discharge the material into the collection chute 8. The material in the collection chute 8 then falls into the discharge assembly 9 and the collection hopper 930, thus entering the next process.

[0098] Multiple feeding hoppers can be set up as needed to meet the requirements of mixed production of multiple types of materials.

[0099] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0101] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A material weighing device, comprising a feeding hopper (2), a collecting chute (8), and a plurality of feeding and weighing mechanisms (3) disposed between the feeding hopper (2) and the collecting chute (8), characterized in that: Each feeding and weighing mechanism (3) includes a screw and round tube combined conveying assembly (310) set at the discharge port of the feeding bin (2), a metering hopper assembly (4) is set below the discharge port of the screw and round tube combined conveying assembly (310), and a collection chute (8) is set below the discharge port of the metering hopper assembly (4). The screw and tube combined conveying assembly (310) includes a tube (311) and a first screw propulsion mechanism (320) for feeding material into the tube (311).

2. The material weighing device according to claim 1, characterized in that: The circular tube (311) is driven to rotate by the circular tube drive assembly (312); the first spiral propulsion mechanism (320) includes a screw drive assembly (321), which is connected to a screw (322), and the screw (322) is provided with a spiral blade (323) for feeding material into the circular tube (311).

3. The material weighing device according to claim 2, characterized in that: Multiple sets of screw and round tube combined conveying assemblies (310) are arranged in parallel; In each screw and tube combination conveying assembly (310), the rotation direction of the tube (311) is opposite to that of the screw (322) inside it; And / or the rotation direction of the circular tube (311) in the adjacent screw and circular tube combined conveying assembly (310) is opposite; And / or the circular tube (311) in the screw and circular tube combination conveying assembly (310) located on both sides is in an inward spiral direction.

4. The material weighing device according to claim 3, characterized in that: The feeding bin (2) is provided with a first connection port (210) for connecting the round tube (311) and an opening (220) for extending the corresponding screw (322) and spiral blade (323) into the feeding bin (2) on both sides. The bottom of the first connection port (210) is provided with a discharge hole (211).

5. The material weighing device according to claim 4, characterized in that: The feeding bin (2) is equipped with at least two long screws (240) connected and driven by the second screw propulsion mechanism (230), and the long screws (240) are equipped with large spiral blades (241).

6. The material weighing device according to claim 5, characterized in that: The measuring bucket assembly (4) includes a first housing (410) and a measuring bucket (400). The first housing (410) is provided with a lever drive assembly (420) and a weighing device. The measuring bucket (400) includes a lever (422) for controlling the opening and closing of the bucket gate in the measuring bucket (400). The movable end of the lever drive assembly (420) passes through the first housing (410) and controls the operation of the lever (422). The weighing device is connected to a hook (430), which is detachably connected to the measuring bucket (400).

7. The material weighing device according to claim 6, characterized in that: The material weighing device includes a control cabinet (6) and several base assemblies (5). The feeding bin (2) of each feeding weighing mechanism (3) is connected to the base assembly (5). The base assembly (5) is fixed on the top surface of the control cabinet (6). The control cabinet (6) has a hollow part (610) in the middle, and the hollow part (610) is connected to the collection chute (8).

8. The material weighing device according to claim 7, characterized in that: The top of the unloading hopper (2) is equipped with the loading hopper (1); The top of the control cabinet (6) is provided with a first dust cover (7) for covering the feeding bin (1), the unloading bin (2), the feeding and weighing mechanism (3), the metering hopper assembly (4), and the base assembly (5). The first dust cover (7) is provided with a second connection port (710) for connecting the dust extraction device and a feeding port (720) for feeding material into the feeding bin (1).

9. The material weighing device according to claim 8, characterized in that: The material weighing device includes a discharge assembly (9) installed at the outlet of the collection chute (8). The discharge assembly (9) is connected to the control cabinet (6) via a mounting bracket (910). A collection hopper (930) is provided below the discharge assembly (9). The discharge assembly (9) is provided with a second dust cover (920) around its perimeter. The second dust cover (920) is provided with an air inlet (921) and an exhaust outlet (922).

10. The material weighing device according to claim 9, characterized in that: The material weighing device also includes an operation panel (911) connected to the mounting frame (910). The first dust cover (7) is made of transparent material; The second dust cover (920) is made of transparent material; The feeding bin (1) and the discharging bin (2) are detachably connected; the discharging bin (2) is detachably connected to the long screw (240), the screw (322) and the round tube (311); the collecting chute (8) and the control cabinet (6) are detachably connected; the discharge assembly (9) and the collecting hopper (930) are detachably connected to the mounting frame (910).

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