High-precision double-screw weightlessness feeding machine

Abstract

The high-precision double-screw weightless feeding machine comprises a machine body, a discharging barrel and a conveying channel, two conveying shafts and a conveying motor driving the two conveying shafts to rotate synchronously are arranged on the conveying channel, and a grinding assembly is arranged in the discharging barrel and comprises a grinding plate, a driving rod and a swing rod; the two grinding plates are arranged at the bottom end of the discharging barrel, the driving rod is connected to the grinding plates and arranged on the discharging barrel in a penetrating mode, the driving rod is connected with connecting columns, the swing rod is rotationally connected to the machine body, the rotating center of the swing rod is located between the two connecting columns, two driving grooves are formed in the swing rod, and the connecting columns are in sliding fit with the driving grooves. A driving assembly for driving one connecting column to move is arranged on the machine body, a weighing assembly for weighing materials is arranged at the position of the material conveying channel, and a guiding piece for guiding the materials to enter the position between the two grinding plates is connected into the discharging barrel. The material conveying device has the effect of improving the material conveying accuracy of the weightlessness feeding machine.

Description

Technical Field

[0001] This application relates to the field of loss-in-weight feeders, and in particular to a high-precision twin-screw loss-in-weight feeder. Background Technology

[0002] The twin-screw loss-in-weight feeder is an automated feeding device designed for materials with poor flowability, easy bridging, or high precision requirements. Its core lies in enhancing the stability of material conveying through the twin-screw structure and combining dynamic weighing technology to achieve continuous and accurate metering.

[0003] Chinese Patent CN208645772U discloses a twin-screw loss-in-weight feeder, which includes a feeder body. The feeder body includes a hopper, a vertical agitator for stirring the material in the hopper, and a vertical agitator rotation drive device. At least a portion of the vertical agitator is inserted into the hopper. The vertical agitator rotation drive device is connected to the vertical agitator to drive its rotation. This invention uses the vertical agitator to stir the material in the hopper, thereby increasing the material's flowability, improving the uniformity of the batching, and ensuring smooth discharge from the feeder body. This improves batching efficiency and quality, making the feeder suitable for batching materials with poor flowability.

[0004] Regarding the aforementioned technologies, existing feeders use a gearbox to drive an arc rod to rotate at the bottom of the hopper, which is used to agitate the material as it falls, thereby reducing bridging. However, due to humidity or the presence of liquid formulations in the material, lumps may exist in the material. Although the aforementioned structure can make the material fall, it cannot crush the lumps. The lumps falling into the housing will affect the weighing of the material and reduce the material conveying accuracy of the loss-in-weight feeder. Summary of the Invention

[0005] To improve the material conveying accuracy of loss-in-weight feeders, this application provides a high-precision twin-screw loss-in-weight feeder.

[0006] This application provides a high-precision twin-screw loss-in-weight feeder using the following technical solution:

[0007] A high-precision twin-screw loss-in-weight feeder includes a machine body, a feeding hopper, and a conveying channel. The conveying channel is horizontally connected to the machine body, and the feeding hopper is vertically connected to the inlet end of the conveying channel. Two conveying shafts and a conveying motor driving the two conveying shafts to rotate synchronously are installed on the conveying channel. A grinding assembly is installed inside the feeding hopper. The grinding assembly includes grinding plates, a drive rod, and a swing rod. Two grinding plates are installed at the bottom of the feeding hopper, facing each other with a gap. The drive rod is connected to... The material is attached to the grinding plate and passes through the discharge hopper. A connecting column is connected to the drive rod. The swing rod is rotatably connected to the machine body. The rotation center of the swing rod is located between the two connecting columns. Two drive slots are opened on the swing rod. The connecting column is slidably engaged with the drive slots. A drive assembly is provided on the machine body to drive one of the connecting columns to move. A weighing assembly for weighing materials is provided at the material conveying channel. A guide for guiding materials into the space between the two grinding plates is connected inside the discharge hopper.

[0008] By adopting the above technical solution, during material feeding, the material is placed in the feeding hopper, guided by a guide component to the space between two grinding plates. The feeding motor is then started, causing the feeding shaft to rotate. Simultaneously, a drive assembly drives one of the connecting columns to reciprocate, causing a swing arm to swing back and forth. This, in turn, drives another drive rod to move alternately with the original drive rod, causing the two grinding plates to move alternately to grind the lumpy material. Finally, during conveying, the material is weighed by a weighing component, allowing for adjustments to the rotation speed of the feeding shaft as needed, achieving the effect of quantitative material feeding by the loss-in-weight feeder. By setting up the grinding component, it is ensured that lumpy material is ground into granules before falling into the feeding hopper. Compared to existing technologies, this minimizes the possibility of lumpy material affecting the feeder's weighing, improving the material conveying accuracy of the loss-in-weight feeder.

[0009] Optionally, the drive assembly includes a drive motor, a rotating disk, and a connecting rod. A mounting frame is connected to the body, the swing arm is rotatably connected to the mounting frame, the rotating disk is rotatably connected to the mounting frame, a drive column is connected to the rotating disk, the drive column is eccentrically arranged, the connecting rod is rotatably connected between the drive column and one of the connecting columns, and the drive motor is mounted on the mounting frame and coaxially connected to the rotating disk.

[0010] By adopting the above technical solution, when the grinding plate is moved, the drive motor is started to make the rotating disk rotate. Through the drive column, the drive rod is driven to move back and forth, and one of the drive rods moves back and forth. Driven by the swing rod, the effect of the two grinding plates moving alternately is achieved.

[0011] Optionally, several grinding flanges are connected to the opposite sidewalls of the two grinding plates, with the top-to-bottom direction as the reference direction, and the grinding flanges on the two grinding plates are arranged alternately.

[0012] By adopting the above technical solution and setting a grinding flange, when the material passes through the two grinding plates, it is not only ground by the two grinding plates, but also squeezed by the grinding flange, which further improves the grinding effect of the material.

[0013] Optionally, the top of the grinding plate is connected to an inclined plate, with the reference direction being from top to bottom, and the distance between the two inclined plates gradually decreases.

[0014] By adopting the above technical solution, the inclined plate is used to help guide the material into the space between the two grinding plates, reducing the possibility that blocky materials will avoid the grinding range of the grinding plates.

[0015] Optionally, the guide is a conical arc plate. The guide is connected inside the material discharge bucket and located above the grinding plate. The larger end of the guide is located at the top. The guide has a material discharge groove facing the position between the two grinding plates.

[0016] By adopting the above technical solution and setting up guide components, the material falls from the chute in a concentrated manner, making it easier for the material to be ground.

[0017] Optionally, an agitation assembly is provided inside the discharge hopper at a position corresponding to the position above the guide member. The agitation assembly includes an agitation motor, an agitation screw, a limiting rod, a lifting block, and agitation blades. A connecting frame is connected inside the discharge hopper. The agitation screw is vertically rotatably connected to the connecting frame. The agitation screw is a reciprocating screw. The limiting rod is vertically connected to the connecting frame. The agitation motor is mounted on the connecting frame and coaxially connected to the agitation screw. The lifting block is disposed between the agitation screw and the limiting rod. The lifting block is threadedly engaged with the agitation screw and slidably engaged with the limiting rod. A rotating ring is rotatably connected to the lifting block. Several agitation blades are connected to the rotating ring. A rotating component for driving the rotating ring to rotate is provided on the connecting frame.

[0018] By adopting the above technical solution, when stirring the material, the stirring motor is started to make the stirring screw rotate. By setting a limiting rod, the lifting block is raised and lowered back and forth, which drives the rotating ring to rise and fall back and forth. At the same time, in conjunction with the rotating component, the rotating ring is rotated, thus achieving the effect of stirring the material.

[0019] Optionally, the rotating component is a connecting arc plate, which is vertically connected to the connecting frame at the position corresponding to the stirring blade. The axis of the rotating component coincides with the stirring screw. A wave groove is vertically opened on the rotating component. A fixed column is connected between the stirring blade and the rotating ring, and the fixed column is slidably fitted in the wave groove.

[0020] By adopting the above technical solution, by setting a wave groove on the rotating part and sliding the fixed column in the wave groove, the rotating ring reciprocates during the movement, causing the stirring blade to reciprocate, thus achieving the effect of the stirring blade reciprocating to stir the material.

[0021] Optionally, the weighing assembly includes a connecting frame, a supporting arc plate, a weighing sensor, and a controller. The connecting frame is connected to the bottom end of the conveying channel, and a weighing groove is opened at the bottom end of the conveying channel. The connecting frame communicates with the interior of the conveying channel through the weighing groove. The supporting arc plate slides horizontally within the connecting frame and fits against the inner wall of the conveying channel. Several weighing sensors are connected between the connecting frame and the supporting arc plate. The controller is connected to the machine body, and both the weighing sensors and the conveying motor are electrically connected to the controller.

[0022] By adopting the above technical solution, when the material moves in the conveying channel, the supporting arc plate falls due to the weight of the material and is weighed by the weighing sensor. The weighing sensor sends an electrical signal to the controller, so that the control system controls the conveying motor at any time to adjust the speed of the conveying shaft and achieve the effect of quantitative material conveying.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During feeding, the material is placed into the feeding hopper and guided to the space between two grinding plates by the guide component. The feeding motor is started, causing the feeding shaft to rotate. Simultaneously, the drive assembly drives one of the connecting columns to move back and forth, causing the swing rod to swing back and forth. This drives the other drive rod to move alternately with the original drive rod, causing the two grinding plates to move alternately to grind the lumpy material. Finally, the material is weighed by the weighing component during conveying, allowing for adjustments to the rotation speed of the feeding shaft as needed, achieving the effect of quantitative material conveying by the loss-in-weight feeder. By setting up the grinding component, it is ensured that lumpy material is ground into granules and falls into the feeding hopper as much as possible. Compared with existing technologies, this minimizes the possibility of lumpy material affecting the weighing of the feeder and improves the material conveying accuracy of the loss-in-weight feeder.

[0025] 2. When the grinding plate moves, the drive motor is started, which makes the rotating disk rotate. Through the drive column, the drive rod moves back and forth, making one of the drive rods move back and forth. Driven by the swing rod, the two grinding plates move alternately.

[0026] 3. By setting a corrugated groove on the rotating part and sliding the fixed column in the corrugated groove, the rotating ring reciprocates during the movement, causing the stirring blades to reciprocate, thus achieving the effect of reciprocating stirring of the material by the stirring blades. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the twin-screw loss-in-weight feeder in the embodiments of this application.

[0028] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the weighing component.

[0029] Figure 3 This is an exploded view used in the embodiments of this application to illustrate the structure of the guide and agitation components.

[0030] Figure 4 This is an exploded view used in the embodiments of this application to illustrate the structure of the agitation component.

[0031] Figure 5 This is a schematic diagram of the grinding assembly in an embodiment of this application.

[0032] Figure 6 This is an exploded view used in the embodiments of this application to illustrate the structure of the grinding component and the driving component.

[0033] Explanation of reference numerals in the attached drawings: 1. Machine body; 11. Conveying motor; 2. Discharging hopper; 3. Conveying channel; 4. Weighing assembly; 41. Connecting frame; 42. Supporting arc plate; 43. Weighing sensor; 44. Controller; 5. Mounting ring; 51. Guide component; 52. Rotating component; 521. Wave groove; 6. Agitating assembly; 61. Agitating motor; 62. Agitating screw; 63. Limiting rod; 64. Lifting block; 641. Rotating ring; 642. Fixed column; 65. Agitating blade; 7. Grinding assembly; 71. Grinding plate; 711. Grinding flange; 712. Inclined plate; 72. Drive rod; 73. Swing rod; 731. Drive groove; 8. Drive assembly; 81. Drive motor; 82. Rotating disk; 83. Connecting rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0035] This application discloses a high-precision twin-screw loss-in-weight feeder. (Refer to...) Figure 1 and Figure 2The high-precision twin-screw loss-in-weight feeder includes a body 1, a discharge hopper 2, and a conveying channel 3. The conveying channel 3 is horizontally mounted on the body 1, and two conveying shafts are rotatably connected inside the conveying channel 3. The two conveying shafts are connected by a gear set. A conveying motor 11 is installed at the end of the conveying channel 3, and the conveying motor 11 is coaxially connected to one of the conveying shafts.

[0036] Reference Figure 1 and Figure 2 A weighing assembly 4 is installed at the bottom of the material conveying channel 3. The weighing assembly 4 includes a connecting frame 41, a supporting arc plate 42, weighing sensors 43, and a controller 44. A weighing groove is opened in the bottom wall of the material conveying channel 3. The connecting frame 41 is fixedly connected to the bottom of the material conveying channel 3. The supporting arc plate 42 slides horizontally within the connecting frame 41 and fits against the inner wall of the material conveying channel 3. Several weighing sensors 43 are installed between the connecting frame 41 and the supporting arc plate 42. The controller 44 is installed on the machine body 1, and the material conveying motor 11 and the weighing sensors 43 are electrically connected to the controller 44.

[0037] During material conveying, the support arc plate 42 descends under the weight of the material and is weighed by the weighing sensor 43. The sensor then sends an electrical signal to the controller 44, causing the control system to adjust the output power of the conveying motor 11 in a timely manner to adjust the speed of the conveying shaft and achieve the effect of quantitative material conveying.

[0038] Reference Figure 1 and Figure 3 The discharge hopper 2 is vertically positioned above the conveying channel 3. A mounting ring 5 is connected to the inlet end of the conveying channel 3 via a flange. A guide 51 is provided inside the mounting ring 5. The guide 51 is a conical arc plate with its larger end facing upwards. A material drop groove is opened on the guide 51.

[0039] Reference Figure 3 and Figure 4 An agitation assembly 6 is positioned above the guide member 51 within the mounting ring 5. The agitation assembly 6 includes an agitation motor 61, an agitation screw 62, a limiting rod 63, a lifting block 64, and agitation blades 65. A connecting frame is fixedly connected within the mounting ring 5. The agitation screw 62 is vertically rotatably connected to the connecting frame; the agitation screw 62 is a reciprocating screw. The agitation motor 61 is mounted on the connecting frame and coaxially connected to the agitation screw 62. The agitation motor 61 is electrically connected to the controller 44. Two limiting rods 63 are vertically fixedly connected to the connecting frame. The lifting block 64 is positioned between the agitation screw 62 and the limiting rod 63. The lifting block 64 is a cylindrical block that is threadedly engaged with the agitation screw 62 and slidably engaged with the limiting rod 63.

[0040] Reference Figure 4A rotating ring 641 is rotatably connected to the lifting block 64. Several fixed posts 642 are circumferentially fixed to the rotating ring 641. In this embodiment, four posts are used as an example. The stirring blade 65 is fixedly connected to the fixed posts 642. A rotating component 52 is provided on the connecting frame. The rotating component 52 is a connecting arc plate. Four rotating components 52 are fixedly connected to the connecting frame. The axis of the rotating component 52 coincides with the stirring screw 62. A wave groove 521 is opened on the rotating component 52. The fixed posts 642 are slidably fitted in the wave groove 521.

[0041] When stirring materials, the stirring motor 61 is driven to rotate the stirring screw 62, causing the lifting block 64 to move up and down repeatedly, which in turn drives the rotating ring 641 to move up and down repeatedly. Through the sliding cooperation between the fixed column 642 and the wave groove 521, the stirring blade 65 is driven to rotate back and forth, thus achieving the effect of stirring materials.

[0042] Reference Figure 5 and Figure 6 A grinding assembly 7 is installed in the feed end of the conveying channel 3. The grinding assembly 7 includes a grinding plate 71, a drive rod 72, and a swing rod 73. Two grinding plates 71 are installed below the guide member 51, and the two grinding plates 71 are arranged opposite each other. Several grinding flanges 711 are fixedly connected to the opposite side walls of the two grinding plates 71. With the reference direction from top to bottom, the grinding flanges 711 on the two grinding plates 71 are staggered. An inclined plate 712 is fixedly connected to the grinding plate 71. With the reference direction from top to bottom, the distance between the two inclined plates 712 gradually decreases. The inclined plate 712 is used to assist in guiding the movement of materials.

[0043] Reference Figure 6 The drive rod 72 is fixedly connected to the grinding plate 71 and passes through the inlet end of the material conveying channel 3. A connecting post is fixedly connected to the end of the drive rod 72. A mounting bracket is fixedly connected to the machine body 1, and the swing rod 73 is rotatably connected to the mounting bracket. The rotation center of the swing rod 73 is located between the two drive rods 72. A drive groove 731 is opened on the swing rod 73. The drive groove 731 is an oblong groove, and the connecting post slides within the oblong groove.

[0044] Reference Figure 1 and Figure 6 The mounting bracket is equipped with a drive assembly 8, which includes a drive motor 81, a rotating disk 82, and a connecting rod 83. The rotating disk 82 is rotatably connected to the mounting bracket, and a drive column is eccentrically fixed to the rotating disk 82. The drive motor 81 is mounted on the mounting bracket and coaxially connected to the rotating disk 82, and is electrically connected to the controller 44. The connecting rod 83 is hinged between the drive column and one of the connecting columns.

[0045] When grinding materials, the drive motor 81 is started, causing the rotating disk 82 to rotate. Through the connecting rod 83, one of the drive rods 72 moves back and forth. Through the swing rod 73, the other drive rod 72 moves alternately with the original drive rod 72, causing the two grinding plates 71 to move alternately, thus achieving the effect of grinding materials.

[0046] The implementation principle of a high-precision twin-screw loss-in-weight feeder in this application embodiment is as follows: During material feeding, the material is introduced into the discharge hopper 2. The controller 44 starts the stirring motor 61, the stirring screw 62 rotates, the lifting block 64 reciprocates, and at the same time drives the stirring blades to move back and forth to stir the material. The material falls through the discharge chute between the two grinding plates 71. The drive motor 81 is started to make the rotating disk 82 rotate, causing one of the drive rods 72 to move back and forth. Through the swing rod 73, the two grinding plates 71 move alternately and grind the material. The material falls into the conveying channel 3. At the same time, the conveying motor 11 is started to make the conveying shaft rotate. When the material moves, it passes through the support arc plate 42 and is weighed by the weighing sensor 43. The weighing sensor 43 sends an electrical signal to the controller 44, so that the control system controls the output power of the conveying motor 11 to achieve the effect of quantitative material conveying.

[0047] By setting up the grinding component 7, it is possible to ensure that lumpy materials are ground into granules and fall into the feeding hopper. Compared with the existing technology, this reduces the possibility of lumpy materials affecting the weighing of the feeder and improves the material conveying accuracy of the loss-in-weight feeder.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision twin-screw loss-in-weight feeder, comprising a machine body (1), a feed tank (2) and a conveying channel (3), the conveying channel (3) being horizontally connected to the machine body (1), the feed tank (2) being vertically connected to a material inlet end of the conveying channel (3), the conveying channel (3) being provided with two conveying shafts and a conveying motor (11) for driving the two conveying shafts to synchronously rotate, characterized in that: The feeding barrel (2) is provided with a grinding assembly (7), the grinding assembly (7) comprises a grinding plate (71), a driving rod (72) and a swing rod (73), two grinding plates (71) are arranged at the bottom end of the feeding barrel (2), the two grinding plates (71) are oppositely arranged and have a gap, the driving rod (72) is connected to the grinding plate (71) and penetrates the feeding barrel (2), a connecting column is connected to the driving rod (72), the swing rod (73) is rotationally connected to the machine body (1), the rotation center of the swing rod (73) is located between the two connecting columns, two driving grooves (731) are formed in the swing rod (73), the connecting column and the driving groove (731) are in sliding fit, the machine body (1) is provided with a driving assembly (8) for driving one of the connecting columns to move, the feeding channel (3) is provided with a weighing assembly (4) for weighing materials, and the feeding barrel (2) is connected with a guide (51) for guiding materials into the two grinding plates (71).

2. The precision twin-screw loss-in-weight feeder of claim 1, wherein: The driving assembly (8) comprises a driving motor (81), a rotating disc (82) and a connecting rod (83), the machine body (1) is connected with a mounting frame, the swing rod (73) is rotationally connected to the mounting frame, the rotating disc (82) is rotationally connected to the mounting frame, a driving column is connected to the rotating disc (82), the driving column is eccentrically arranged, the connecting rod (83) is rotationally connected between the driving column and one of the connecting columns, and the driving motor (81) is mounted on the mounting frame and coaxially connected with the rotating disc (82).

3. The precision twin-screw loss-in-weight feeder of claim 1, wherein: A plurality of grinding flanges (711) are connected to the opposite side walls of the two grinding plates (71), and the grinding flanges (711) on the two grinding plates (71) are staggered from top to bottom.

4. The precision twin-screw loss-in-weight feeder of claim 3, wherein: The top end of the grinding plate (71) is connected with an inclined plate (712), and the distance between the two inclined plates (712) gradually decreases from top to bottom.

5. The precision twin-screw loss-in-weight feeder of claim 1, wherein: The guide (51) is a conical arc plate, the guide (51) is connected in the feeding barrel (2) and located above the grinding plate (71), the larger end of the guide (51) is located above, a material falling groove is formed in the guide (51), and the material falling groove faces the position between the two grinding plates (71).

6. The precision twin-screw loss-in-weight feeder of claim 1, wherein: The feeding barrel (2) is provided with an agitating assembly (6) at a position corresponding to the position above the guide (51), the agitating assembly (6) comprises an agitating motor (61), an agitating screw (62), a limiting rod (63), a lifting block (64) and agitating blades (65), a connecting frame is connected in the feeding barrel (2), the agitating screw (62) is vertically connected to the connecting frame, the agitating screw (62) is a reciprocating screw, the limiting rod (63) is vertically connected to the connecting frame, the agitating motor (61) is mounted on the connecting frame and coaxially connected to the agitating screw (62), the lifting block (64) is arranged between the agitating screw (62) and the limiting rod (63), the lifting block (64) is threadedly connected to the agitating screw (62) and slidably connected to the limiting rod (63), a rotating ring (641) is rotatably connected to the lifting block (64), and the agitating blades (65) are connected to the rotating ring (641).

7. The precision twin-screw loss-in-weight feeder of claim 6, wherein: The rotating member (52) is a connecting arc plate, the rotating member (52) is vertically connected to the connecting frame at a position corresponding to the agitating blades (65), the axis of the rotating member (52) coincides with the agitating screw (62), a wave groove (521) is vertically formed in the rotating member (52), and a fixing column (642) is connected between the agitating blades (65) and the rotating ring (641) and slidably fitted in the wave groove (521).

8. The precision twin-screw loss-in-weight feeder of claim 1, wherein: The weighing assembly (4) comprises a connecting frame (41), a supporting arc plate (42), weighing sensors (43) and a controller (44), the connecting frame (41) is connected to the bottom end of the material conveying channel (3), the bottom end of the material conveying channel (3) is provided with a weighing groove, the connecting frame (41) is in communication with the inside of the material conveying channel (3) through the weighing groove, the supporting arc plate (42) is slidably fitted in the connecting frame (41) and engages with the inner wall of the material conveying channel (3), the weighing sensors (43) are connected to the connecting frame (41) and the supporting arc plate (42), and the controller (44) is connected to the machine body (1), and the weighing sensors (43) and the material conveying motor (11) are electrically connected to the controller (44).

Images