A feeding device for loss-in-weight scale

Abstract

The present invention discloses a feeding device for a loss-in-weight scale; it relates to the technical field of loss-in-weight scales, and comprises a frame, a tank body is arranged inside the frame, a fixed plate is horizontally fixedly connected to the outside of the tank body, weighing sensors are connected to the four corners of the bottom surface of the fixed plate, the lower end of the tank body is connected to a discharge tank, and the lower end of the discharge tank is connected to a discharge assembly; a feeding mechanism is arranged inside the tank body and on the tank cover; the present invention realizes the transportation and metering of the feeding assembly and the discharge assembly; at the same time, the weighing sensor monitors the weight change in real time, thereby improving the feeding efficiency; the dynamic wind field design of the dust removal assembly is used to improve the cleanliness of the material; the obstruction of the material falling is avoided, and the material quality and the equipment operating environment are significantly improved; the feeding process of the loss-in-weight scale is realized through the multi-system integrated design; and unified maintenance is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of loss-in-weight scales, and in particular to a feeding device for loss-in-weight scales. Background Art

[0002] As a high-precision dynamic metering and conveying equipment, the development background of loss-in-weight scales is closely related to the upgrading of industrial production's demand for metering accuracy and automation level. It also relies on the progress of weighing technology, control theory and materials science. In the field of loss-in-weight scale feeding, traditional feeding devices often have the following problems: 1. Poor conveying and metering: the feeding hopper is prone to sticking residual materials, resulting in blockage and uneven feeding; the unloading is mostly single-screw pushing, which is inefficient and has large discharge fluctuations. The weighing sensor lacks linkage with the feeding and unloading links, making it difficult to adjust the speed in real time and resulting in large metering errors. , the whole process controllability is poor; second, cleanliness and environmental issues: static dust removal only has a single air outlet to extract dust, the coverage is limited, and the dust removal rate is low, which not only affects the quality of the material, but also easily accumulates and interferes with the weighing accuracy, and may also cause the air pressure in the tank to be unbalanced, hindering the falling of the material; third, low integration and efficiency: feeding, weighing, dust removal, discharging and other functions are realized by decentralized equipment, with complex connections, long paths, high energy consumption, large space occupation, high maintenance costs, poor equipment coordination, low overall operating efficiency, and difficulty in forming a continuous process; therefore, improvements and treatments are needed based on the above problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a feeding device for a loss-in-weight scale.

[0004] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a feeding device for a loss-in-weight scale, comprising a frame, a tank body is provided inside the frame, a fixed plate is horizontally fixed to the outside of the tank body, and weighing sensors are connected to the four corners of the bottom surface of the fixed plate, and the weighing sensors are installed on the frame; a tank cover is installed on the top surface of the tank body, and a discharge tank is connected to the lower end of the tank body, two discharge ports are provided at the lower end of the discharge tank, and a discharge assembly is connected to the lower end of the discharge tank; a feeding mechanism is provided in the tank body and on the tank cover, the feeding mechanism includes a feeding assembly provided at the upper end of the tank cover, and the feeding mechanism also includes a dust removal assembly provided in the tank body.

[0005] Preferably, the discharge assembly includes a discharge box installed at the discharge port at the lower end of the discharge tank, the discharge box is connected to the discharge tank, and a connecting plate is installed on the bottom surface of the discharge box, and a first motor is installed on the rear end of the top surface of the connecting plate, and the output shaft of the first motor is connected to a double-headed screw rod through a coupling, and the double-headed screw rod passes through the discharge box, and a material guide pipe is installed on the front end surface of the discharge box, and the front end of the double-headed screw rod is placed in the material guide pipe.

[0006] Preferably, the feeding assembly includes a feeding hopper installed on the top surface of the tank cover, a feeding pipe is installed on the upper end of one side of the feeding hopper, a lower hopper is installed on the other end of the feeding pipe, and a second motor is installed in the middle of the top surface of the feeding hopper, the output shaft of the second motor passes through the upper end of the feeding hopper, and the output shaft of the second motor is connected to the first connecting rod through a coupling, the first connecting rod is vertically placed in the feeding hopper, and the outer side of the first connecting rod is connected to a spiral feeding plate, the outer side of the spiral feeding plate abuts against the inner wall of the feeding hopper, and the spiral feeding plate is provided with a plurality of equidistant discharge holes.

[0007] Preferably, a second connecting rod is vertically provided at the connection between the feeding hopper and the tank cover, the upper end of the second connecting rod is connected to the lower end of the first connecting rod through a flange, and a spiral blanking plate is installed on the upper end of the second connecting rod.

[0008] Preferably, the dust removal component includes an air drying box arranged inside the tank body, the air drying box is in an inverted bucket shape, and the inclined surface of the outer side of the air drying box is sequentially installed with air guide plates from top to bottom, the diameters of the multiple air guide plates increase sequentially from top to bottom, the bottom surface of the air guide plate is provided with multiple equidistant air outlet holes, and the cross-section of the air guide plate is J-shaped, an air guide pipe is provided inside the tank body, and the air guide pipe is L-shaped; one end of the air guide pipe is placed in the air drying box, and the other end of the air guide pipe passes through the tank body.

[0009] Preferably, a plurality of equidistant ventilation holes are provided on the outside of one end of the air duct, and a filter is installed at the other end of the air duct; a support plate is installed below one end of the air duct, the air drying box is rotatably connected to the air duct through a bearing, and the air drying box abuts against the support plate; scrapers are installed at the four ends of the bottom surface of the air drying box, and the scrapers abut against the outer wall of the air duct.

[0010] Preferably, a driving bevel gear is installed at the lower end of the second connecting rod, a quarter of the teeth are installed on the outside of the driving bevel gear, and one side of the driving bevel gear is meshed with a transition bevel gear, one side of the transition bevel gear is rotatably connected to a connecting rod, the other end of the connecting rod is fixed to the inner wall of the tank, and a protective box is installed at one end of the connecting rod, and the driving bevel gear and the transition bevel gear are placed in the protective box.

[0011] Preferably, a third connecting rod is connected to the flange in the middle of the top surface of the air drying box, the upper end of the third connecting rod passes through the protective box, and a driven bevel gear is installed on the upper end of the third connecting rod, and the driven bevel gear is meshed with the transition bevel gear for transmission.

[0012] Preferably, the rear end of the top surface of the tank cover is connected to an exhaust pipe, and the other end of the exhaust pipe is externally connected to an air pump.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The invention uses a feeding assembly and a discharge assembly to convey and meter materials. In the feeding assembly, a second motor drives the spiral feed plate to rotate. Its close contact with the inner wall of the feed hopper can scrape off residual materials. The discharge hole design ensures uniform feeding, and the spiral discharge plate further prevents material accumulation. The discharge assembly uses a double-headed screw rod, which is driven by the first motor to synchronously push the material, and cooperates with the guide tube to achieve stable output. At the same time, the weighing sensor monitors weight changes in real time and accurately controls the feeding and discharge rates by adjusting the motor speed. Compared with traditional feeding devices, this structure solves the problems of material blockage and uneven conveying, improves the measurement accuracy of the loss-in-weight scale, ensures that the material is controllable from feeding to discharging, and improves feeding efficiency.

[0015] 2. This invention improves material cleanliness through the dynamic wind field design of the dust removal component. In the dust removal component, the air drying box is shaped like an inverted bucket and can rotate. The diameter of its outer air guide plate increases from top to bottom. Combined with the filtered air input by the air duct, it forms a multi-layered uniform wind field through the air outlet, effectively blowing away the dust on the surface of the material. The air pump creates negative pressure through the exhaust pipe, quickly expelling the dust from the tank. The filter screen of the air duct prevents the entry of external impurities, and the protective box ensures the stability of the gear transmission. Compared with traditional static dust removal methods, this design not only improves the dust removal rate and prevents dust adhesion from affecting the accuracy of the weighing sensor, but also balances the air pressure in the tank, preventing the material from being blocked from falling, significantly improving the material quality and the equipment operating environment.

[0016] 3. The present invention realizes the feeding process of the loss-in-weight scale through a multi-system integrated design. The device uses a tank body and a frame as a carrier, and integrates a feeding component, a dust removal component, a discharge component and a weighing sensor. Each component forms a continuous closed loop of "feeding-dust removal-weighing-discharging" through mechanical linkage and circuit control. Feeding and dust removal realize power sharing through connecting rod gears, and discharge and weighing are linked and adjusted in real time. Compared with traditional decentralized equipment, this integrated structure shortens the material conveying path and facilitates unified maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the connection between the tank body and the feed tank of the present invention;

[0021] Figure 4This is a schematic diagram of the connection between the feeding tank and the feeding assembly of the present invention;

[0022] Figure 5 Schematic cross-sectional view of the blanking tank and blanking assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the feeding mechanism of the present invention;

[0024] Figure 7 It is a transmission schematic diagram of the feeding mechanism of the present invention;

[0025] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the feeding mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the connection between the air drying box and the air duct of the present invention;

[0027] Figure 10 For the present invention Figure 7 A magnified schematic diagram of the structure of part A in the middle;

[0028] Serial numbers in the figure: 1. Frame; 2. Tank body; 3. Tank cover; 4. Discharge tank; 5. Fixed plate; 6. Weighing sensor; 7. Discharge box; 8. Connecting plate; 9. First motor; 10. Double-headed screw rod; 11. Guide pipe; 12. Feed hopper; 13. Feed pipe; 14. Second motor; 15. First connecting rod; 16. Spiral feed plate; 17. Second connecting rod; 18. Spiral discharge plate; 19. Driving bevel gear; 20. Transition bevel gear; 21. Driven bevel gear; 22. Connecting rod; 23. Third connecting rod; 24. Air drying box; 25. Air guide pipe; 26. Filter; 27. Support plate; 28. Protective box; 29. ​​Exhaust pipe; 30. Discharge hopper; 31. Scraper. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example 1: See Figures 1 to 10The feeding device for a loss-in-weight scale in the present invention comprises a frame 1, a tank body 2 is provided inside the frame 1, a fixing plate 5 is fixedly connected to the outside of the tank body 2 horizontally, and a weighing sensor 6 is connected to the four corners of the bottom surface of the fixing plate 5, and the weighing sensor 6 is installed on the frame 1; a tank cover 3 is installed on the top surface of the tank body 2, and a discharge tank 4 is connected to the lower end of the tank body 2, and two discharge ports are provided at the lower end of the discharge tank 4, and a discharge assembly is connected to the lower end of the discharge tank 4; a feeding mechanism is provided in the tank body 2 and on the tank cover 3, and the feeding mechanism includes a The material is transported to the feed container 2 by the feed hopper 12, and the feed container 2 is connected to the feed container 4 to form a main channel for material circulation; the feed container 2 is connected to the feed container 4 by the feed hopper 12, and the feed container 2 is connected to the feed container 4 by the feed hopper 12. There is a double-headed screw rod 10, which passes through the discharge box 7. A material guide pipe 11 is installed on the front end surface of the discharge box 7, and the front end of the double-headed screw rod 10 is placed in the material guide pipe 11; the discharge box 7 facilitates providing a stable space for the double-headed screw rod 10 to transport materials; the connecting plate 8 facilitates providing stable support for the first motor 9; the first motor 9 facilitates providing power for the transportation of materials in the discharge box 7 and the material guide pipe 11; the double-headed screw rod 10 facilitates improving the material transportation efficiency and ensuring the quantitative output of materials.

[0031] Example 2: The technical solution is basically the same as that of Example 1, except that Figure 6 、 Figure 7 、 Figure 8As shown, the feeding assembly includes a feeding hopper 12 installed on the top surface of the tank cover 3, a feeding pipe 13 is installed on the upper end of one side of the feeding hopper 12, and a lower hopper 30 is installed on the other end of the feeding pipe 13, and a second motor 14 is installed in the middle of the top surface of the feeding hopper 12, the output shaft of the second motor 14 passes through the upper end of the feeding hopper 12, and the output shaft of the second motor 14 is connected to a first connecting rod 15 through a coupling, the first connecting rod 15 is vertically placed in the feeding hopper 12, and the outer side of the first connecting rod 15 is connected to a spiral feeding plate 16, the outer side of the spiral feeding plate 16 abuts against the inner wall of the feeding hopper 12, and the spiral feeding plate 16 is provided with a plurality of equidistant discharge holes; A second connecting rod 17 is vertically provided at the connection between the feeding hopper 12 and the tank cover 3. The upper end of the second connecting rod 17 is connected to the lower end of the first connecting rod 15 through a flange, and a spiral feed plate 18 is installed on the upper end of the second connecting rod 17; the feeding hopper 12 is used to provide space for the initial conveying of materials; the feeding pipe 13 is used to facilitate the entry of external materials into the channel of the feeding hopper 12, thereby realizing a continuous supply of materials; the feed hopper 30 is used to facilitate the feeding of materials to the loss-in-weight scale; the second motor 14 is used to facilitate the power provided to the feeding assembly; the first connecting rod 15 is used to facilitate the power transmitted to the spiral feeding plate 16, driving it to rotate to convey materials; the spiral feeding The plate 16 is convenient for scraping off the residual material on the bucket wall to prevent blockage and ensure smooth feeding; the rotation of the first connecting rod 15 is conveniently transmitted to the spiral discharge plate 18 and the driving bevel gear 19 through the second connecting rod 17, so as to realize the linkage between feeding and dust removal components; the spiral discharge plate 18 is used to prevent the accumulation of materials at the tank cover 3, so as to ensure that the materials enter the tank body 2 smoothly; the dust removal component includes an air drying box 24 arranged inside the tank body 2, the air drying box 24 is in the shape of an inverted bucket, and the outer inclined surface of the air drying box 24 is sequentially installed with air guide plates from top to bottom, the diameters of the multiple air guide plates increase from top to bottom, and the bottom surface of the air guide plate is provided with multiple equidistant air outlet holes, and the air guide holes are arranged at the bottom of the air guide plate. The cross section of the plate is J-shaped, and an air guide duct 25 is provided inside the tank body 2, and the air guide duct 25 is L-shaped; one end of the air guide duct 25 is placed in the air drying box 24, and the other end of the air guide duct 25 passes through the tank body 2; the air drying box 24 is used to blow air evenly to the materials at different heights in the tank body 2, thereby achieving dust removal and air drying effects; the air guide duct 25 is used to introduce external air into the air drying box 24, and the ventilation holes make the air flow evenly distributed, providing an air flow source for dust removal and air drying; the air guide plate is used to support the material, so that the wind from the upper air guide plate is directed to the lower air guide plate, thereby facilitating air drying of the material, and then the air guide plate is rotated to allow the material to be thrown out by centrifugal force.

[0032] Example 3: The technical solution is basically the same as that of Example 1, except that Figure 3 、 Figure 9 、 Figure 10As shown, a plurality of equidistant ventilation holes are provided on the outer side of one end of the air duct 25, and a filter screen 26 is installed at the other end of the air duct 25; a support plate 27 is installed below one end of the air duct 25, and the air drying box 24 is rotatably connected to the air duct 25 through a bearing, and the air drying box 24 abuts against the support plate 27; scrapers 31 are installed at the four ends of the bottom surface of the air drying box 24, and the scrapers 31 abut against the outer wall of the air duct 25; the air entering the air duct 25 is easily filtered through the filter screen 26 to prevent external dust from entering the tank body 2 and contaminating the material, thereby ensuring the purity of the material; the scrapers 31 It is convenient to scrape the dust on the outer wall of the air duct 25; the support plate 27 is used to ensure its stability during rotation to avoid shaking that affects the dust removal effect; the lower end of the second connecting rod 17 is equipped with a driving bevel gear 19, and the outer side of the driving bevel gear 19 is equipped with a quarter of the teeth, and the conical surface of the remaining wheel body is smooth, and one side of the driving bevel gear 19 is meshed with a transition bevel gear 20, and one side of the transition bevel gear 20 is rotatably connected to a connecting rod 22, and the other end of the connecting rod 22 is fixed to the inner wall of the tank body 2, and one end of the connecting rod 22 is equipped with a protective box 28, and the driving bevel gear The gears 19 and the transition bevel gear 20 are placed in the protective box 28; the intermittent transmission of power is facilitated by the driving bevel gear 19 to adapt to the periodic working requirements of the dust removal component; the power of the driving bevel gear 19 is conveniently transmitted to the driven bevel gear 21 through the transition bevel gear 20 to change the power transmission direction; the rotation of the transition bevel gear 20 is facilitated by the connecting rod 22; the transmission between the gears is prevented from being stuck by impurities through the protective box 28; the middle flange of the top surface of the air drying box 24 is connected to the third connecting rod 23, the upper end of the third connecting rod 23 passes through the protective box 28, and the third connecting rod 23 is conveniently transmitted to the driven bevel gear 21 through the transition bevel gear 20 to change the power transmission direction; the connecting rod 22 is convenient for the rotation of the transition bevel gear 20; the protective box 28 is used to prevent impurities from being stuck in the transmission between the gears; the third connecting rod 23 is connected to the third connecting rod 23 at the middle of the top surface of the air drying box 24, the upper end of the third connecting rod 23 passes through the protective box 28, and the third connecting rod 23 is conveniently transmitted to the driven bevel gear 21 through the transition bevel gear 21 to change the power transmission direction; the connecting rod 22 is convenient for the rotation of the transition bevel gear 20; the protective box 28 is used to prevent impurities from being stuck in the transmission between the gears; the third connecting rod 23 is connected to the third connecting rod 23 at the upper end of the third connecting rod 23 A driven bevel gear 21 is installed at the upper end of the rod 23, and the driven bevel gear 21 is meshed with the transition bevel gear 20 for transmission; the power of the driven bevel gear 21 is easily transmitted to the air drying box 24 through the third connecting rod 23, driving the air drying box 24 to rotate, thereby realizing the dynamic operation of the dust removal component; the driven bevel gear 21 is easily driven to rotate the third connecting rod 23, thereby realizing the transmission of power from the transition bevel gear 20 to the third connecting rod 23; the rear end of the top surface of the tank cover 3 is connected to an exhaust pipe 29, and the other end of the exhaust pipe 29 is externally connected to an air pump; the exhaust pipe 29 is used to facilitate the discharge of dust.

[0033] Working Principle: In this embodiment, the present invention also proposes a method for using a feeding device for a loss-in-weight scale, comprising the following steps:

[0034] Step 1: First, connect all electrical equipment to the wires and power on, then let the external material enter the feeding hopper 12 through the feeding pipe 13, start the second motor 14, and drive the first connecting rod 15 and the spiral feeding plate 16 to rotate, so that the spiral feeding plate 16 scrapes the residual material on the hopper wall and feeds the material evenly through the discharge hole; the first connecting rod 15 drives the second connecting rod 17 and the spiral discharge plate 18 to introduce the material into the tank body 2; the total weight is monitored in real time by the weighing sensor 6 and the signal is transmitted to the control system. The system adjusts the speed of the second motor 14 accordingly to control the feeding rate and maintain the amount of material in the tank within a reasonable range;

[0035] Step 2: The driving bevel gear 19 is driven to rotate by the second connecting rod 17, and the driving bevel gear 19 intermittently meshes with the transition bevel gear 20, and the transition bevel gear 20 is meshed with the driven bevel gear 21 to transmit the transmission, thereby driving the third connecting rod 23 to rotate, and then driving the air drying box 24 to rotate around the air guide pipe 25; when the air drying box 24 is in the transmission intermittent state and does not rotate, the material will temporarily remain in the curved groove at the bottom of the air guide plate, thereby extending the air drying operation of the air body for the agglomerated material, and when the air drying box 24 rotates, it will pass through the curved groove. The temporarily air-dried material is thrown out and hits the inner wall, which can cause the air-dried material to impact and disperse. The relatively wet material is still adhered to it. Then the air pump is started to extract the gas and dust inside the tank body 2 through the exhaust pipe 29. At this time, the external air enters through the air guide pipe 25 of the filter 26, is dispersed to the air drying box 24 through the ventilation holes, and then blows towards the material through the air outlet holes of the air guide plate, blowing away the dust and drying the relatively wet material; the air pump extracts the dust through the exhaust pipe 29 to avoid pollution and affect the weighing accuracy;

[0036] In step three, the dust-removed and air-dried material continues to fall into the discharge tank 4 at the lower end of the tank body 2, and enters the corresponding discharge box 7 through the two discharge ports at the lower end of the discharge tank 4; start the first motor 9, and the double-headed screw 10 is driven to rotate through the output shaft of the first motor 9 through the coupling. The double-headed screw 10 passes through the discharge box 7 and the front end extends into the guide pipe 11; due to the special structure of the double-headed screw 10, the material in the discharge box 7 can be pushed at the same time, which greatly improves the material conveying efficiency and ensures that the material enters the guide pipe 11 evenly; at this time, the weighing sensor 6 continuously monitors the total weight of the tank body 2, the remaining material, the discharge tank 4 and the discharge assembly in real time, and calculates the real-time discharge flow rate through the weight change rate;

[0037] Step 4. When the feeding task is completed, first stop the operation of the second motor 14, turn off the feeding control device of the feeding pipe 13, and stop conveying materials into the feeding hopper 12; when it is observed that the material in the feeding hopper 12 is basically empty, and the weighing sensor 6 confirms that the material in the tank body 2, the discharge tank 4 and the discharge box 7 is close to the empty weight, stop the first motor 9 and end the discharging process.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A feeding device for a loss-in-weight scale, comprising a frame (1), characterized in that: The frame (1) is provided with a tank body (2) inside, a fixing plate (5) is fixedly connected horizontally to the outside of the tank body (2), and weighing sensors (6) are connected to the four corners of the bottom surface of the fixing plate (5), and the weighing sensors (6) are installed on the frame (1); a tank cover (3) is installed on the top surface of the tank body (2), and the lower end of the tank body (2) is connected to a discharge tank (4), the lower end of the discharge tank (4) is provided with two discharge ports, and the lower end of the discharge tank (4) is connected to a discharge assembly; a feeding mechanism is provided in the tank body (2) and on the tank cover (3), the feeding mechanism includes a feeding assembly provided at the upper end of the tank cover (3), and the feeding mechanism also includes a dust removal assembly provided in the tank body (2); The discharge assembly comprises a discharge box (7) installed at a discharge port at the lower end of the discharge tank (4), the discharge box (7) is connected to the discharge tank (4), and a connecting plate (8) is installed on the bottom surface of the discharge box (7), a first motor (9) is installed at the rear end of the top surface of the connecting plate (8), an output shaft of the first motor (9) is connected to a double-headed screw rod (10) through a coupling, the double-headed screw rod (10) passes through the discharge box (7), a guide pipe (11) is installed on the front end surface of the discharge box (7), and the front end of the double-headed screw rod (10) is placed in the guide pipe (11); The feeding assembly includes a feeding hopper (12) mounted on the top surface of the tank cover (3), a feeding pipe (13) mounted on the upper end of one side of the feeding hopper (12), a lower hopper (30) mounted on the other end of the feeding pipe (13), and a second motor (14) mounted in the middle of the top surface of the feeding hopper (12), an output shaft of the second motor (14) passes through the upper end of the feeding hopper (12), and the output shaft of the second motor (14) is connected to a first connecting rod (15) through a coupling, the first connecting rod (15) is vertically arranged in the feeding hopper (12), and a spiral feeding plate (16) is connected to the outer side of the first connecting rod (15), the outer side of the spiral feeding plate (16) abuts against the inner wall of the feeding hopper (12), and the spiral feeding plate (16) is provided with a plurality of equidistant discharge holes; The dust removal assembly includes an air drying box (24) arranged inside the tank body (2), the air drying box (24) is in an inverted bucket shape, and air guide plates are sequentially installed on the outer inclined surface of the air drying box (24) from top to bottom, the diameters of the multiple air guide plates increase from top to bottom, the bottom surface of the air guide plate is provided with multiple equidistant air outlet holes, and the cross section of the air guide plate is J-shaped, an air guide pipe (25) is provided inside the tank body (2), and the air guide pipe (25) is L-shaped; one end of the air guide pipe (25) is placed in the air drying box (24), and the other end of the air guide pipe (25) passes through the tank body (2).

2. A feeding device for a loss-in-weight scale according to claim 1, characterized in that: A second connecting rod (17) is vertically provided at the connection between the feeding hopper (12) and the tank cover (3); the upper end of the second connecting rod (17) is connected to the lower end of the first connecting rod (15) through a flange, and a spiral blanking plate (18) is installed at the upper end of the second connecting rod (17).

3. A feeding device for a loss-in-weight scale according to claim 1, characterized in that: A plurality of equidistant ventilation holes are provided on the outer side of one end of the air guide tube (25), and a filter screen (26) is installed on the other end of the air guide tube (25); a supporting plate (27) is installed below one end of the air guide tube (25), the air drying box (24) is rotatably connected to the air guide tube (25) through a bearing, and the air drying box (24) abuts against the supporting plate (27); scrapers (31) are installed at the four ends of the bottom surface of the air drying box (24), and the scrapers (31) abut against the outer wall of the air guide tube (25).

4. A feeding device for a loss-in-weight scale according to claim 2, characterized in that: A driving bevel gear (19) is installed at the lower end of the second connecting rod (17), and a quarter of the teeth are installed on the outer side of the driving bevel gear (19), and one side of the driving bevel gear (19) is meshed with a transition bevel gear (20), and one side of the transition bevel gear (20) is rotatably connected to a connecting rod (22), and the other end of the connecting rod (22) is fixed to the inner wall of the tank body (2), and a protective box (28) is installed at one end of the connecting rod (22), and the driving bevel gear (19) and the transition bevel gear (20) are placed in the protective box (28).

5. The feeding device for a loss-in-weight scale according to claim 1, characterized in that: A third connecting rod (23) is connected to a flange in the middle of the top surface of the air drying box (24), the upper end of the third connecting rod (23) passes through the protective box (28), and a driven bevel gear (21) is installed on the upper end of the third connecting rod (23), and the driven bevel gear (21) is meshed with the transition bevel gear (20) for transmission.

6. The feeding device for a loss-in-weight scale according to claim 1, characterized in that: The rear end of the top surface of the tank cover (3) is connected to an exhaust pipe (29), and the other end of the exhaust pipe (29) is externally connected to an air pump.

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