A high-precision metering and conveying system

By adopting an electromagnetic vibration feeding device and weighing feeding device with adjustable vibration frequency and amplitude in the material metering and conveying system, using near-resonance technology and precise weighing technology, the problem of difficulty in uniform mixing and layering of materials during the conveying process is solved, and high-precision material transportation is achieved and production efficiency is improved.

CN222699551UActive Publication Date: 2025-04-01ATEBURUI QINHUANGDAO TECH CO LTD
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Patent Information

Application Number
CN202420980424.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-08
Publication Date
2025-04-01
Estimated Expiration
2034-05-08

AI Technical Summary

Technical Problem

Existing material metering and conveying equipment is difficult to ensure the uniform mixing of multiple materials, resulting in the easy layering of materials during the transportation process, affecting product accuracy and production efficiency.

Method used

A high-precision metering conveying system is designed, and an electromagnetic vibration feeding device with adjustable vibration frequency and amplitude is used to drive the conveying tank to carry animal materials through near-resonance technology to ensure that the materials remain uniformly mixed during the transportation process. At the same time, a weighing feeding device is installed in the system to accurately control the weight of the material and ensure that the product's material usage is strictly controlled.

Benefits of technology

Through the application of near-resonance technology, the layering phenomenon of materials during the transportation process is effectively avoided, the accuracy of the product and the conveying quality of the production line are improved, and the overall production efficiency is improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a high-precision metering and conveying system, which comprises a main support, a main material bin on which feeding and discharging are connected in sequence from top to bottom, a stirring and unloading device, an electromagnetic vibration feeding device and a weighing feeding device, wherein the electromagnetic vibration feeding device comprises an adjustable support seat arranged on the vibration support, a conveying trough bin arranged on the adjustable angle support seat, and an electromagnetic vibration driver arranged below the adjustable support seat and transmission-connected therewith, wherein the adjustable angle support seat comprises a fixed base and an inclined mounting seat, wherein the conveying trough bin is arranged on the inclined mounting seat, the inclined mounting seat at the feeding end of the conveying trough bin is arranged on the fixed base through an angle adjustment mechanism, and the inclined mounting seat at the discharging end is hinged to the fixed base; a shock-absorbing rubber block group A is evenly distributed on the lower end of the fixed base, and is arranged on the vibration support through the shock-absorbing rubber block group A.
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Description

Technical Field

[0001] The utility model belongs to the technical field of material metering and conveying, and relates to a metering and conveying system, in particular to a high-precision metering and conveying system. Background Art

[0002] In the field of material metering and conveying, the measured materials are often mixed, weighed, and conveyed with multiple materials. The mixed materials conveyed to the subsequent workstations need to undergo other processes such as molding. Therefore, it is necessary to ensure the uniformity of the mixing of multiple materials during the material weighing and conveying process. However, the existing technology is difficult to meet this requirement. Materials of different volumes and shapes are prone to stratification during the actual conveying process: materials with large particles and light weight are prone to accumulate on the upper layer of the mixed materials; materials with small particles and heavy weight are prone to accumulate on the lower layer of the mixed materials. This will not only result in poor quality and precision of the products produced, but also reduce the conveying efficiency, thereby affecting the production efficiency of the entire production line. Utility Model Content

[0003] The utility model aims to provide a high-precision metering and conveying system to solve the technical problems of poor precision and low production efficiency of traditional weighing and conveying equipment.

[0004] In order to achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A high-precision metering and conveying system, comprising a main support, a main material bin, a stirring and discharging device, an electromagnetic vibrating feeding device and a weighing feeding device on the main support, wherein the electromagnetic vibrating feeding device comprises an adjustable support seat arranged on the vibration support, a conveying trough bin arranged on the adjustable angle support seat, and an electromagnetic vibrating driver arranged below the adjustable support seat and connected to the adjustable support seat, wherein the adjustable angle support seat comprises a fixed base and an inclined mounting seat, wherein the conveying trough bin is arranged on the inclined mounting seat, wherein the inclined mounting seat at the feeding end of the conveying trough bin is arranged on the fixed base through an angle adjustment mechanism, and the inclined mounting seat at the discharging end is hinged to the fixed base;

[0006] The lower end of the fixed base is evenly distributed with a shock-absorbing rubber block group A, which is arranged on the vibration bracket.

[0007] The main support includes an upper support and a lower support. The main material bin, stirring and feeding device, electromagnetic vibration feeding device and weighing feeding device are arranged on the upper support in sequence. The bottom of the upper support is evenly provided with shock-absorbing rubber block group B, which is arranged on the lower support through the shock-absorbing rubber block group B.

[0008] The main material bin is also provided with a material level meter, a pneumatic percussion hammer and a pneumatic vibrator. The lower end of the material level meter extends into the main material bin, and the upper end extends out of the main material bin. The main material bin is funnel-shaped. The number of the pneumatic percussion hammer and the pneumatic vibrator are two or more, which are arranged at intervals on the side wall of the main material bin.

[0009] The stirring and feeding device includes a stirrer, a reduction motor and a stirring device cover. The reduction motor is transmission-connected to the stirrer. The stirrer is located at the discharge port of the main material bin. The stirring device cover is arranged below the stirrer and has an opening at the upper end to receive the material brought out by the stirrer. The discharge port of the stirring device cover is connected to the feed port of the electromagnetic vibration feeding device.

[0010] The weighing and feeding device includes a weighing silo, a weighing bracket, a weighing sensor, a fabric bag and an opening and closing mechanism. The weighing bracket is horizontally arranged on the upper bracket through a weighing conveying mechanism. The weighing silo is arranged on the weighing bracket through a weighing sensor. The starting end of the stroke of the weighing silo is located at the discharge end of the conveying trough bin. The fabric bag is in the shape of a soft cylinder and is connected to the discharge port of the weighing silo. The opening and closing mechanism is arranged on the weighing brackets on the front and rear sides of the fabric bag, and has the freedom to clamp and close the discharge end of the fabric bag and relax and open it.

[0011] The opening and closing mechanism includes a telescopic rod and a swing arm clamp. The two ends of the swing arm clamp are respectively rotatably set on the weighing bracket. There are two swing arm clamps, and the clamping length is greater than the length of the outlet of the fabric bag. The telescopic rod is arranged between the two swing arm clamps and is transmission-connected to the lower part of the swing arm clamps. The upper parts of the two swing arm clamps are respectively provided with meshing teeth that mesh with each other.

[0012] It also includes a conveying and distributing device, which includes a secondary track horizontally arranged on the lower bracket, and a conveying-distributing bin which is arranged on the secondary track through a mounting frame and is horizontally displaced under the drive of the secondary track. The unloading port of the weighing and feeding device is located above the loading port of the conveying-distributing bin within the travel range; the primary rail and the secondary rail of the secondary track are respectively driven by the primary bracket matching motor and the primary bracket matching motor drive shaft, the secondary bracket matching motor and the secondary bracket matching motor drive shaft arranged on the lower bracket.

[0013] The weighing bracket is provided with position sensors pointing to the weighing bracket above both ends of the stroke.

[0014] It also includes a dust removal cover, which is arranged above the travel range of the weighing and feeding device through a bracket cover.

[0015] It also includes a guide rail fixed on the ground. The lower end of the lower bracket is provided with a pulley matched with the guide rail. The lower bracket is arranged on the guide rail through the pulley and has the freedom to slide relative to the guide rail.

[0016] It also includes a ladder, which extends from the lower end of the lower bracket to the top end of the upper bracket.

[0017] The beneficial effect of the utility model is that the utility model provides a high-precision metering and conveying system, and conveys materials by adopting an electromagnetic vibrating feeding device with adjustable frequency and amplitude. The frequency and amplitude can be adjusted according to the properties of the materials when conveying the materials, thereby driving the conveying trough to drive the materials to produce near resonance, so that the mixed materials can be conveyed while maintaining a uniform mixture, effectively avoiding the stratification of the materials during the conveying process and improving the product precision; in addition, the near-resonance conveying method can also speed up the conveying speed, and can further prevent the stratification of the materials, thereby improving the conveying quality of the production line and the overall production quality.

[0018] The utility model also provides a weighing feeding device at the discharge end of the electromagnetic vibration feeding device, so as to accurately control the weight of the material delivered to the weighing silo, thereby strictly controlling the material consumption of the final product.

[0019] In addition, by setting a secondary track on the lower bracket and setting the conveying-distributing bin on the secondary track, the conveying distance of the conveying-distributing bin can be effectively increased on the basis of reducing the space occupied by the track, so that the material can be accurately transported to the designated location. By setting a guide rail and placing the lower bracket on the guide rail, the distribution range of the system can be further extended, and the distribution can be more convenient and quick to meet the actual production needs.

[0020] In addition, the settings of shock-absorbing rubber block group A, shock-absorbing rubber block group B, and shock-absorbing rubber block group C can effectively absorb the vibration generated by the components, avoiding impact and damage to the components under the vibration source, thereby ensuring that the rest of the device can operate smoothly and extending the service life of these components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged schematic diagram of the electromagnetic vibration feeding device, weighing feeding device and conveying and distributing device;

[0023] Figure 3 It is a partial structural schematic diagram of the weighing and feeding device in the utility model;

[0024] Figure 4 for Figure 3 Right view of .

[0025] Markings in the figure: 1. Main silo, 101. Upper bracket, 102. Lower bracket, 103. Guide rail, 2. Level meter, 3. Pneumatic hammer, 4. Pneumatic vibrator, 5. Agitator, 6. Gear motor, 7. Agitator cover, 8. Adjustable support seat, 81. Fixed base; 82. Tilted mounting seat, 9. Electromagnetic vibration driver, 10. Conveying trough, 11. Dust cover, 12. Weighing bracket, 13. Weighing silo, 131. Fabric bag, 1 32. Swing arm clamp, 133. Meshing teeth, 134. Weighing sensor, 14. Weighing conveying mechanism, 141. Weighing conveying motor, 142. Weighing conveying guide rail, 15. Telescopic rod, 16. Primary bracket supporting motor drive shaft, 17. Secondary bracket supporting motor drive shaft, 18. Shock-absorbing rubber block group A, 19. Shock-absorbing rubber block group C, 20. Shock-absorbing rubber block group B, 21. Conveying-fabric bin, 22. Conveying fabric bag, 23. Position sensor, 24. Ladder. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1 , Figure 2As shown, the utility model provides a high-precision metering and conveying system, which includes a main support, a main material bin 1, a stirring and feeding device, an electromagnetic vibration feeding device and a weighing feeding device, on which feeding and discharging are connected in sequence from top to bottom, the mixed material is stored in the main material bin 1, the stirring and feeding device rotates at the discharge port of the main material bin 1 to drive the mixed material to fall into the conveying trough bin 10 of the electromagnetic vibration feeding device, the material is conveyed to the weighing feeding device through the near-resonance conveyance of the electromagnetic vibration feeding device, and the mixed material can be transferred to the designated position or mold after being weighed. Specifically, the electromagnetic vibration feeding device includes an adjustable support seat 8 arranged on a vibration bracket, a conveying trough bin 10 arranged on an adjustable angle support seat, and an electromagnetic vibration driver 9 arranged below the adjustable support seat 8 and connected thereto. In the present embodiment, since the mixed materials to be conveyed by the system are mostly particles and powders, in order to avoid dust pollution to the surrounding environment during the conveying process, the conveying trough bin 10 in the present embodiment adopts a sealed structure. In addition, the adjustable angle support seat includes a fixed base 81 and an inclined mounting seat 82. The conveying trough bin 10 is arranged on the inclined mounting seat 82. The inclined mounting seat 82 on the feeding end side of the conveying trough bin 10 is arranged on the fixed base 81 through an angle adjustment mechanism, and the inclined mounting seat 82 on the discharging end side is hinged to the fixed base 81. Driven by the angle adjustment mechanism, the feeding end of the conveying trough bin 10 is driven to be raised or lowered. There are many types of angle adjustment mechanisms, such as a telescopic rod 15 whose telescopic end contacts the bottom surface of the inclined mounting seat 82. The technicians can flexibly select them according to the actual situation, and no specific limitation is made in the present embodiment. In addition, in order to prevent the electromagnetic vibration driver 9 from damaging the bracket below due to long-term vibration, in this embodiment, a shock-absorbing rubber block group A18 is evenly arranged at the lower end of the fixed base 81, and the fixed base 81 is set on the main bracket through the shock-absorbing rubber block group.

[0028] Furthermore, in order to further reduce the impact of the vibration of the electromagnetic vibration feeding device on the main support and ensure that the lower end of the main support remains stable and fixed during operation, the main support in this embodiment includes an upper support 101 and a lower support 102, and the main material bin 1, the stirring and feeding device, the electromagnetic vibration feeding device and the weighing feeding device are sequentially arranged on the upper support 101, and the shock-absorbing rubber block group B20 is evenly arranged at the bottom of the upper support 101, and the upper support 101 is arranged on the lower support 102 through the shock-absorbing rubber block group B20.

[0029] In addition, since the mixed materials are mostly granular or powdery materials, it is easy for the materials to get stuck or stick to the wall during the unloading process of the main silo 1. In this embodiment, in order to avoid this and ensure that the materials can flow out of the main silo 1 quickly and smoothly, the main silo 1 is set to be funnel-shaped, and a pneumatic hammer 3 and a pneumatic vibrator 4 are set outside the main silo 1. In this embodiment, the number of pneumatic hammers 3 and pneumatic vibrators 4 is two, respectively, and they are arranged on the side wall of the main silo 1 at intervals and symmetrically. At the same time, in order to facilitate the observation of the amount of remaining materials in the main silo 1, a level meter 2 is also set in the main silo 1 in this embodiment, wherein the lower end of the level meter 2 extends into the main silo 1, and the upper end extends out of the main silo 1.

[0030] The stirring feeding device in this embodiment includes a stirrer 5, a reduction motor 6 and a stirring device cover 7. The reduction motor 6 is connected to the stirrer 5 in a transmission manner and is used to control the rotation speed of the stirrer 5 to reduce and adjust the speed at which the material enters the stirring device cover 7, thereby controlling the feeding speed of the system as a whole. The stirrer 5 is located at the discharge port of the main silo 1, and the stirring device cover 7 is arranged below the stirrer 5 and has an upper opening to receive the material brought out by the stirrer 5. The discharge port of the stirring device cover 7 is connected to the feed port of the electromagnetic vibration feeding device.

[0031] Further, such as Figure 3 , Figure 4 As shown, in order to facilitate the measurement of the weight of the mixed material delivered in a single time, thereby facilitating the transfer of a certain amount of material to a designated location and controlling the delivery accuracy of the material, the weighing and feeding device in this embodiment includes a weighing silo 13, a weighing bracket 12, a weighing sensor 134, a cloth bag 131 and an opening and closing mechanism, wherein the weighing silo 13 is arranged on the weighing bracket 12 through the weighing sensor 134, and in order to avoid the instantaneous impact generated by the weighing silo 13 in the process of receiving the material from affecting the weighing sensor 134, thereby extending the service life of the weighing sensor 134, in this embodiment, a shock-absorbing rubber block group C19 is also arranged between the weighing silo 13 and the weighing sensor 134. The present embodiment also includes a weighing and conveying mechanism 14, which includes a weighing and conveying motor 141 and a weighing and conveying guide rail 142, wherein the weighing bracket 12 is horizontally arranged on the upper bracket 101 through the weighing and conveying guide rail 142, and the weighing and conveying motor 141 is connected to the weighing bracket 12 through a transmission shaft. The weighing silo 13 has the freedom to move horizontally along the weighing and conveying guide rail 142 under its drive, and the starting end of the stroke of the weighing silo 13 is located at the discharge end of the conveying trough bin 10, and the end of the stroke is within the range of the feed port of the next device.

[0032] In addition, in order to facilitate the positioning of the weighing bin 13, in this embodiment, position sensors 23 pointing to the weighing bracket 12 are respectively arranged above the two ends of the weighing bracket 12. When the weighing bracket 12 moves into the sensing range of the weighing sensor 134, it stops moving.

[0033] The cloth bag 131 is made of a wear-resistant material and is made into a soft cylindrical shape, and the upper end is fixed outside the discharge port of the weighing bin 13. Figure 3 , Figure 4 As shown, the opening and closing mechanism includes a telescopic rod 15 and a swing arm clamp 132. The two ends of the swing arm clamp 132 are respectively rotatably set on the load-bearing bracket. There are two swing arm clamps 132. The two swing arm clamps 132 are symmetrically arranged on the front and rear sides of the fabric bag 131. The lower end is used to clamp the fabric bag 131, and the clamping length is greater than the length of the outlet of the fabric bag 131. The telescopic rod 15 is provided at both the left and right ends of the two swing arm clamps 132 and is located between the two swing arm clamps 132. The fixed end of the telescopic rod 15 is provided on the weighing bracket 12, and the telescopic end is hinged to the lower part of one of the swing arm clamps 132. The upper parts of the two swing arm clamps 132 are respectively provided with mutually meshing meshing teeth 133. When the telescopic rod 15 is extended or retracted, one swing arm clamp 132 drives the other swing arm clamp 132 to swing at the same time through the meshing teeth 133, thereby driving the swing arm clamp 132 to clamp the lower end of the fabric bag 131, so that the lower end of the fabric bag 131 is closed and receives the material together with the weighing bin 13, or when the weighing bin 13 is moved to the specified position, the lower end of the fabric bag 131 is opened to transport the fabric bag 131 and the materials in the weighing bin 13 to the next device.

[0034] Furthermore, in order to further reduce the adverse effects of materials on the surrounding environment during weighing and transferring, a dust cover 11 is provided above the weighing and feeding device in this embodiment. The dust cover 11 is provided above the travel range of the weighing and feeding device through a bracket cover.

[0035] In addition, in order to facilitate the transfer of the quantitative mixed material measured by the weighing and feeding device to the designated position, a conveying and distributing device is provided on the lower bracket 102 in this embodiment, wherein the conveying and distributing device includes a secondary track horizontally arranged on the lower bracket 102, and a conveying-distributing bin 21 arranged on the secondary track through a mounting frame and can be horizontally displaced under the drive of the secondary track. In order to provide guidance for the discharge port of the conveying-distributing bin 21, a conveying and distributing bag 22 is also provided at the discharge port of the conveying-distributing bin 21, and the conveying and distributing belt 22 in this embodiment is selected as a cylindrical structure of wear-resistant material; in order to facilitate the transfer of materials, a secondary track is provided below the weighing and conveying guide rail 142, and the discharge port of the weighing and feeding device is located above the upper material port of the conveying-distributing bin 21 within the stroke range; in this embodiment, the primary track and the secondary track of the secondary track are driven by the primary bracket matching motor and the primary bracket matching motor transmission shaft 16, the secondary bracket matching motor and the secondary bracket matching motor transmission shaft 17 respectively provided on the lower bracket 102. The setting of the secondary track can effectively increase the travel of the conveying-distributing bin 21 while occupying as little space as possible, so that the conveying-distributing bin 21 can transfer the materials to a larger linear range after receiving the materials measured by the weighing bin 13 and the cloth bag 131.

[0036] On the basis of the secondary track, in order to improve the overall scene adaptability of the system, enable it to better adapt to the production environment, and be able to distribute materials to designated locations more quickly and conveniently, the system in this embodiment also includes a guide rail 103 fixed to the ground, and a pulley matching the guide rail 103 is provided at the lower end of the lower bracket 102. The lower bracket 102 is arranged on the guide rail 103 through the pulley and can slide relative to the guide rail 103, further expanding the material distribution range of the system.

[0037] In order to facilitate the staff to inspect and repair the various components of the conveying system, a ladder 24 is also provided on one side of the main support in this embodiment. The ladder 24 is located on one side of the main support and extends from the lower end of the lower support 102 to the top of the upper support 101.

[0038] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-precision metering and conveying system, characterized in that: It comprises a main support, a main material bin (1) connected in sequence from top to bottom on the main support for feeding and discharging, a stirring feeding device, an electromagnetic vibrating feeding device and a weighing feeding device, the electromagnetic vibrating feeding device comprising an adjustable support seat (8) arranged on the vibration support, a conveying trough bin (10) arranged on the adjustable angle support seat, and an electromagnetic vibrating driver (9) arranged below the adjustable support seat (8) and connected thereto in a transmission manner, the adjustable angle support seat comprising a fixed base (81) and an inclined mounting seat (82), the conveying trough bin (10) being arranged on the inclined mounting seat, the inclined mounting seat (82) at the feeding end of the conveying trough bin (10) being arranged on the fixed base (81) through an angle adjustment mechanism, and the inclined mounting seat (82) at the discharging end being hinged to the fixed base (81); A shock-absorbing rubber block group A (18) is evenly distributed on the lower end of the fixed base (81), and the shock-absorbing rubber block group A (18) is arranged on the vibration bracket.

2. A high-precision metering and conveying system according to claim 1, characterized in that: The main support comprises an upper support (101) and a lower support (102); the main material bin (1), the stirring feeding device, the electromagnetic vibration feeding device and the weighing feeding device are sequentially arranged on the upper support (101); a shock-absorbing rubber block group B (20) is evenly arranged on the bottom of the upper support (101), and is arranged on the lower support (102) through the shock-absorbing rubber block group B (20).

3. A high-precision metering and conveying system according to claim 1, characterized in that: The main material bin (1) is also provided with a material level meter (2), a pneumatic percussion hammer (3) and a pneumatic vibrator (4); the lower end of the material level meter (2) extends into the main material bin (1), and the upper end extends out of the main material bin (1); the main material bin (1) is funnel-shaped; the pneumatic percussion hammer (3) and the pneumatic vibrator (4) are respectively provided in two or more quantities and are arranged at intervals on the side wall of the main material bin (1).

4. A high-precision metering and conveying system according to claim 1, characterized in that: The stirring and feeding device comprises a stirrer (5), a reduction motor (6) and a stirring device cover (7); the reduction motor (6) is transmission-connected to the stirrer (5); the stirrer (5) is located at the discharge port of the main material bin (1); the stirring device cover (7) is arranged below the stirrer (5) and has an upper opening to receive the material brought out by the stirrer (5); the discharge port of the stirring device cover (7) is connected to the feed port of the electromagnetic vibration feeding device.

5. A high-precision metering and conveying system according to claim 2, characterized in that: The weighing feeding device comprises a weighing silo (13), a weighing bracket (12), a weighing sensor (134), a fabric bag (131) and an opening and closing mechanism. The weighing bracket (12) is horizontally arranged on an upper bracket (101) through a weighing conveying mechanism (14). The weighing silo (13) is arranged on the weighing bracket (12) through a weighing sensor (134). The starting end of the weighing silo (13) is located at the discharge end of the conveying trough bin (10). The fabric bag (131) is in the shape of a soft cylinder and is connected to the discharge port of the weighing silo (13). The opening and closing mechanism is arranged on the weighing bracket (12) at the front and rear sides of the fabric bag (131) and has the freedom to clamp and close the discharge end of the fabric bag (131) and to open and close it.

6. A high-precision metering and conveying system according to claim 5, characterized in that: The opening and closing mechanism comprises a telescopic rod (15) and a swing arm clamp (132), the two ends of the swing arm clamp (132) are respectively rotatably arranged on the weighing bracket (12), the number of the swing arm clamps (132) is two, and the clamping length is greater than the length of the outlet of the cloth bag (131), the telescopic rod (15) is arranged between the two swing arm clamps (132) and is transmission-connected to the lower part of the swing arm clamp (132), and the upper parts of the two swing arm clamps (132) are respectively provided with mutually meshing meshing teeth (133).

7. A high-precision metering and conveying system according to claim 5, characterized in that: It also includes a conveying and distributing device, the conveying and distributing device includes a secondary track horizontally arranged on the lower bracket (102), and a conveying-distributing bin (21) arranged on the secondary track through a mounting frame and horizontally displaced under the drive of the secondary track, the unloading port of the weighing and feeding device is located above the upper port of the conveying-distributing bin (21) within the travel range; the primary rail and the secondary rail of the secondary track are respectively driven by a primary bracket matching motor and a primary bracket matching motor transmission shaft (16), a secondary bracket matching motor and a secondary bracket matching motor transmission shaft (17) arranged on the lower bracket (102).

8. A high-precision metering and conveying system according to claim 5, characterized in that: The weighing bracket (12) is provided with position sensors (23) pointing to the weighing bracket (12) above both ends of the travel.

9. A high-precision metering and conveying system according to claim 1, characterized in that: It also includes a dust removal cover (11), which is arranged above the travel range of the weighing and feeding device through a bracket cover.

10. A high-precision metering and conveying system according to claim 2, characterized in that: It also includes a guide rail (103) fixed on the ground, a pulley matching the guide rail (103) is arranged at the lower end of the lower bracket (102), and the lower bracket (102) is arranged on the guide rail (103) through the pulley and has the freedom to slide relative to the guide rail (103).