A high-precision double screw feeder

Abstract

The application discloses a high-precision double-screw feeding machine, which comprises a weighing table, a machine head, a material basin, a conveying pipe and conveying screws, the machine head is arranged on the weighing table, one end of the conveying pipe and the material basin are connected with one side of the machine head, the conveying pipe is horizontally arranged below the material basin, two conveying screws are arranged in the conveying pipe in parallel along the length direction of the conveying pipe, one end of the conveying screw extends out of the conveying pipe, a driving piece for driving the conveying screw to rotate is arranged in the machine head, and the bottom end of the material basin is arranged in communication with the conveying pipe. The application has the effect of improving the feeding precision of the device.

Description

Technical Field

[0001] This application relates to the technical field of accurate material weighing, and in particular to a high-precision twin-screw feeder. Background Technology

[0002] A feeder is an auxiliary device used to continuously and uniformly convey bulk materials (such as powders, granules, lumps, flakes, etc.) to subsequent equipment (such as crushers, mixers, reaction vessels, production lines, etc.) at a predetermined rate or dosage. It is widely used in industrial fields such as mining, metallurgy, chemicals, food, building materials, and agriculture. The core function of a feeder is to "regulate the material conveying rhythm," ensuring that subsequent processes can stably receive raw materials. It is a key piece of equipment connecting material storage and processing.

[0003] Currently, the common feeding method involves using a feeder to transport weighed and metered materials to subsequent processing stages. However, materials may adhere to or remain in the feeding device, affecting the feeding accuracy. Furthermore, for feeding devices with minimal material residue, the amount of material directly impacts product quality in processes requiring high precision. Therefore, there is an urgent need for a high-precision feeding device to meet the evolving needs of these processes. Utility Model Content

[0004] To improve the feeding accuracy of the device, this application provides a high-precision twin-screw feeder.

[0005] The high-precision twin-screw feeder provided in this application adopts the following technical solution:

[0006] A high-precision twin-screw feeder includes a weighing platform, a die head, a material basin, a transmission pipe, and conveying screws. The die head is disposed on the weighing platform. One end of the transmission pipe and the material basin are both connected to one side of the die head. The transmission pipe is horizontally disposed below the material basin. Two conveying screws are arranged parallel to each other along the length of the transmission pipe, with one end of each conveying screw extending out of the transmission pipe. The die head is provided with a drive component for driving the conveying screws to rotate. The bottom end of the material basin is connected to the transmission pipe.

[0007] By adopting the above technical solution, during feeding, a certain amount of material is first placed in the material basin. The weighing platform first weighs the total weight of the material. Two conveying screws rotate under the drive of the drive unit, conveying the material in the basin. The material exits from the open end of the transmission pipe and falls into the next stage. The weighing platform weighs the remaining material in the device again. By calculating the difference between the two weighings, the weight of the material exiting the device is accurately measured, avoiding the influence of material adhering to the device on feeding accuracy. Through the coordinated operation of the weighing platform, die head, material basin, transmission pipe, and conveying screws, the feeding accuracy of the device is improved.

[0008] Optionally, a guide tube is vertically connected to the open end of the transmission tube, and the end of the conveying screw extending out of the transmission tube is located in the guide tube, with both ends of the guide tube being open.

[0009] By adopting the above technical solution, the guide tube guides the powder of the output device, reducing the impact of airflow in the external environment on the falling powder, and also reducing the possibility of the powder falling into the external environment.

[0010] Optionally, the weighing platform includes a housing and a pressure sensor disposed therein. A base is provided below the weighing platform, and a locking plate is provided between the base and the weighing platform. The locking plate includes a vertical plate and a horizontal plate. The vertical plate is connected to the vertical outer wall of the weighing platform through a first connector, and the horizontal plate is connected to the top surface of the base through a second connector.

[0011] By adopting the above technical solution, when the device is transported, the locking plate, the first connecting piece, and the second connecting piece are used to lock the weighing platform and the base platform, so that the weighing platform and the base platform are relatively stationary. This reduces the possibility that the pressure sensor in the weighing platform will be subjected to uneven force due to bumps during transportation, reduces the possibility of damage to the pressure sensor, and helps to extend the service life of the device.

[0012] Optionally, the vertical plate has a connecting waist-shaped hole along the vertical direction. The first connecting member includes a connecting screw and a locking nut. One end of the connecting screw is horizontally connected to the vertical side wall of the weighing platform near the locking plate. The connecting screw extends out of the vertical plate through the connecting waist-shaped hole and is threadedly connected to the locking nut. When the connecting screw is located at the top of the connecting waist-shaped hole, the bottom surface of the weighing platform and the top surface of the base platform are spaced apart.

[0013] By adopting the above technical solution, during the transport process, the weighing platform is lifted into a suspended state. At this time, the connecting screw is located at the top of the connecting oblong hole, and the locking nut is used to lock the connecting screw, thus achieving the positioning of the weighing platform. The pressure sensor is not under force at this time, further reducing the possibility of damage to the pressure sensor during transmission. When weighing, the locking nut is loosened, and the weighing platform slides down under gravity until it contacts the top surface of the base platform, at which point normal weighing can be performed.

[0014] Optionally, the guide tube has a communication port for the transmission tube to extend into, and an mounting plate is connected to the outer ring wall of the guide tube, the mounting plate being detachably connected to the transmission tube.

[0015] By adopting the above technical solution, the guide tube is detachably connected to the transmission tube through the mounting plate, making it easy for operators to remove the guide tube for cleaning.

[0016] Optionally, the top surface of the base platform is provided with a top support wedge, and one top support wedge is provided on each of the opposite sides of the weighing platform. The wedge-shaped surface of the top support wedge faces the weighing platform, and the base platform is provided with a driving member for driving the top support wedge to move closer to or away from the weighing platform.

[0017] By adopting the above technical solution, when the weighing platform is erected using the locking plate, the driving component drives the top support wedge block to move towards the weighing platform. The wedge-shaped surface of the top support wedge block contacts the bottom surface of the weighing platform, thereby achieving support for the bottom surface of the weighing platform and improving the structural stability of the weighing platform during transportation.

[0018] Optionally, an anti-slip pad is provided on the wedge-shaped surface of the top support wedge.

[0019] By adopting the above technical solution, the setting of the protective pad increases the friction between the top support wedge and the weighing platform, and further improves the stability when the top support wedge contacts the weighing platform.

[0020] Optionally, the bottom surface of the base platform is provided with a number of supporting rubber blocks.

[0021] By adopting the above technical solution, the supporting rubber block absorbs minor vibrations from the external environment, reducing the impact of the external environment on the accuracy of weighing. In addition, the supporting rubber block also reduces the possibility of slippage of the base platform during weighing.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Through the cooperation of the weighing platform, machine head, material basin, transmission pipe and conveying screw, the feeding accuracy of the device can be improved;

[0024] 2. The locking plate reduces the possibility of uneven stress on the pressure sensor in the weighing platform due to bumps during transportation, thus reducing the possibility of damage to the pressure sensor and helping to extend the service life of the device.

[0025] 3. The supporting rubber blocks absorb minor vibrations from the external environment, reducing the impact of the external environment on the accuracy of weighing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the structure of a high-precision twin-screw feeder according to an embodiment of this application.

[0027] Figure 2 This is a partial sectional view used in the embodiments of this application to illustrate the internal structure of the weighing platform.

[0028] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0029] Figure 4 yes Figure 1 Enlarged view of section B in the middle.

[0030] Figure 5 yes Figure 1 Enlarged view of section C.

[0031] Explanation of reference numerals in the attached drawings: 1. Base platform; 2. Weighing platform; 21. Outer shell; 22. Support block; 23. Pressure sensor; 3. Machine head; 4. Material basin; 5. Transmission pipe; 6. Conveying screw; 7. Connecting assembly; 71. Connecting rod; 72. Top block; 73. Sliding ring; 74. Compression spring; 8. Vertical plate; 81. Connecting oblong hole; 9. Horizontal plate; 10. Connecting screw; 11. Locking nut; 12. Connecting plate; 13. Top support wedge; 14. Anti-slip pad; 15. Adjusting screw; 16. Guide pipe; 161. Connecting port; 17. Mounting plate; 18. Mounting groove; 19. Supporting rubber block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be further described in detail below. Embodiments of this application provide a high-precision twin-screw feeder, which improves the feeding accuracy of the device.

[0033] Reference Figure 1 and Figure 2A high-precision twin-screw feeder includes a base platform 1, a weighing platform 2, a feed head 3, a feed basin 4, a transmission pipe 5, conveying screws 6, and a connecting assembly 7. Several supporting rubber blocks 19 are connected to the bottom surface of the base platform 1, and the weighing platform 2 is placed on the base platform 1. The feed head 3 is vertically mounted on the top surface of the weighing platform 2. One end of the transmission pipe 5 is horizontally connected to the feed head 3. Two conveying screws 6 are parallel and closely fitted within the inner cavity of the transmission pipe 5, with the end of the conveying screw 6 away from the feed head 3 extending out of the transmission pipe 5. A drive source for rotating the feed head 3 is provided within the feed head 3. The feed basin 4 is connected to one side of the feed head 3 and located above the transmission pipe 5. The bottom end of the feed basin 4 is connected to the top end of the transmission pipe 5, and a stirring component for mixing materials is provided within the feed basin 4.

[0034] Reference Figure 1-3 The weighing platform 2 includes a housing 21, a support block 22, and a pressure sensor 23. The housing 21 covers the support block 22, and the bottom surface of the support block 22 is flush with the bottom end of the housing 21. The pressure sensor 23 is connected to the top of the support block 22, and the top of the pressure sensor 23 is connected to the inner top wall of the housing 21. A locking plate is provided between the weighing platform 2 and the base platform 1, with one locking plate on each opposite side of the weighing platform 2. The locking plate includes a vertical plate 8 and a horizontal plate 9 connected to the bottom end of the vertical plate 8. The horizontal plate 9 is bolted to the top surface of the base platform 1. A connecting waist-shaped hole 81 is provided on the vertical plate 8 along the vertical direction. A connecting screw 10 corresponding to the position of the connecting waist-shaped hole 81 is horizontally connected to the vertical outer wall of the weighing platform 2. The connecting screw 10 passes through the connecting waist-shaped hole 81 and passes through the vertical plate 8. A locking nut 11 is threadedly connected to one end of the connecting screw 10 that protrudes from the vertical plate 8. The locking nut 11 abuts against the vertical plate 8. When the connecting screw 10 is located at the top of the connecting waist-shaped hole 81, the weighing platform 2 and the base platform 1 are spaced apart.

[0035] Reference Figure 4 Two connecting plates 12 are vertically connected to the base platform 1, with one connecting plate 12 on each of the opposite sides of the weighing platform 2. A top support wedge 13 is provided on the side of the connecting plate 12 closest to the weighing platform 2. The bottom surface of the top support wedge 13 slides against the top surface of the base platform 1, and the wedge-shaped surface of the top support wedge 13 is located on the side closest to the weighing platform 2. An anti-slip pad 14 is provided on the wedge-shaped surface of the top support wedge 13. An adjusting screw 15 is horizontally threaded onto the connecting plate 12. The adjusting screw 15 is vertically positioned about the vertical sidewall of the weighing platform 2, and one end of the adjusting screw 15 is rotatably connected to the top support wedge 13.

[0036] Reference Figure 2 and Figure 5The open end of the transmission pipe 5 is vertically provided with a guide pipe 16 with two openings. The guide pipe 16 has a connecting port 161 for the end of the transmission pipe 5 to extend into. The conveying screw 6 extends into the guide pipe 16. A mounting plate 17 is connected to the guide pipe 16. The end of the mounting plate 17 away from the guide pipe 16 has a mounting groove 18 along its length.

[0037] Reference Figure 2 and Figure 5 Two sets of connecting components 7 are provided at the top end of the transmission pipe 5. The connecting components 7 include a connecting rod 71, a top block 72, a sliding ring 73, and a compression spring 74. The connecting rod 71 is vertically connected to the transmission pipe 5, the top block 72 is connected to the top end of the connecting rod 71, the sliding ring 73 is slidably sleeved on the connecting rod 71, and the compression spring 74 is sleeved on the connecting rod 71. One end of the compression spring 74 is connected to the bottom surface of the top block 72, and the other end is connected to the top surface of the sliding ring 73. The connecting rod 71 is inserted into the mounting groove 18 of the mounting plate 17, and the sliding plate is pressed against the mounting plate 17 under the action of the compression spring 74.

[0038] Reference Figure 1 , Figure 2 and Figure 5 During feeding, a certain amount of powder is first loaded into the material basin 4. At this time, the weighing platform 2 performs a preliminary weighing of the overall weight of the material. The conveying screw 6 rotates under the drive of the drive source and conveys the material in the material basin 4. The material is output through the transmission pipe 5, and the guide pipe 16 guides the powder, reducing the possibility of the powder falling into the external environment and reducing the impact of airflow on the falling material. The weighing platform 2 weighs the overall weight of the material in the device after feeding. By calculating the difference between the two weights, the system achieves accurate weighing of the material, avoiding the influence of powder adhering to the device on the weighing accuracy. When it is necessary to clean the guide pipe 16, the sliding ring 73 is slid upward, compressing the spring 74 to accumulate elastic potential energy. The mounting plate 17 is then pulled out, realizing the disassembly of the guide pipe 16.

[0039] Reference Figure 2-4 During transport of the device, turning the adjusting screw 15 moves the top support wedge 13 towards the weighing platform 2, lifting it up. The anti-slip pad 14 increases the sliding friction between the top support wedge 13 and the weighing platform 2, helping to achieve stable support for the symmetrical weighing platform 2. At this time, the connecting screw 10 moves to the top of the connecting oblong hole 81, and the locking nut 11 is used to lock the vertical plate 8 and the weighing platform 2, thus fixing the position of the symmetrical weighing platform 2. At this time, the pressure sensor 23 inside the weighing platform 2 is not under force, reducing the possibility of the pressure sensor 23 being damaged by bumps during transportation.

[0040] The implementation principle of a high-precision twin-screw feeder in this embodiment is as follows: During feeding, a certain amount of powder is first loaded into the material basin 4, and the conveying screw 6 conveys the material. The material is output through the transmission pipe 5, and the weighing platform 2 weighs the overall weight of the material in the device after feeding. By calculating the difference between the two weights, the accurate weighing of the material is achieved.

[0041] During transport, the top support wedge 13 lifts the weighing platform 2. At this time, the connecting screw 10 moves to the top of the connecting waist-shaped hole 81, and the locking nut 11 is used to lock the vertical plate 8 and the weighing platform 2. At this time, the pressure sensor 23 inside the weighing platform 2 is not under force, reducing the possibility of the pressure sensor 23 being damaged by bumps during transportation.

[0042] 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 feeder, characterized in that: The device includes a weighing platform (2), a machine head (3), a material basin (4), a transmission pipe (5), and a conveying screw (6). The machine head (3) is mounted on the weighing platform (2). One end of the transmission pipe (5) and the material basin (4) are connected to one side of the machine head (3). The transmission pipe (5) is horizontally positioned below the material basin (4). Two conveying screws (6) are arranged parallel to each other along the length of the transmission pipe (5). One end of the conveying screw (6) extends out of the transmission pipe (5). The machine head (3) is equipped with a drive unit for driving the conveying screws (6) to rotate. The bottom end of the material basin (4) is connected to the transmission pipe (5).

2. The high-precision twin-screw feeder according to claim 1, characterized in that: The open end of the transmission pipe (5) is vertically connected to a guide pipe (16), and the end of the conveying screw (6) extending out of the transmission pipe (5) is located in the guide pipe (16). Both ends of the guide pipe (16) are open.

3. The high-precision twin-screw feeder according to claim 1, characterized in that: The weighing platform (2) includes a housing (21) and a pressure sensor (23) disposed therein. A base (1) is provided below the weighing platform (2). A locking plate is provided between the base (1) and the weighing platform (2). The locking plate includes a vertical plate (8) and a horizontal plate (9). The vertical plate (8) is connected to the vertical outer wall of the weighing platform (2) through a first connector. The horizontal plate (9) is connected to the top surface of the base (1) through a second connector.

4. A high-precision twin-screw feeder according to claim 3, characterized in that: The vertical plate (8) has a connecting waist-shaped hole (81) along the vertical direction. The first connecting member includes a connecting screw (10) and a locking nut (11). One end of the connecting screw (10) is horizontally connected to the vertical side wall of the weighing platform (2) near the locking plate. The connecting screw (10) extends out of the vertical plate (8) through the connecting waist-shaped hole (81) and is threadedly connected to the locking nut (11). When the connecting screw (10) is located at the top of the connecting waist-shaped hole (81), the bottom surface of the weighing platform (2) and the top surface of the base platform (1) are spaced apart.

5. A high-precision twin-screw feeder according to claim 2, characterized in that: The guide tube (16) has a communication port (161) for the transmission tube (5) to extend into. An installation plate (17) is connected to the outer ring wall of the guide tube (16). The installation plate (17) is detachably connected to the transmission tube (5).

6. A high-precision twin-screw feeder according to claim 4, characterized in that: The top surface of the base (1) is provided with a top support wedge (13), and one top support wedge (13) is provided on each of the opposite sides of the weighing platform (2). The wedge-shaped surface of the top support wedge (13) is facing the weighing platform (2). The base (1) is provided with a driving member for driving the top support wedge to move closer to or further away from the weighing platform (2).

7. A high-precision twin-screw feeder according to claim 6, characterized in that: The wedge-shaped surface of the top support wedge (13) is provided with anti-slip pads (14).

8. A high-precision twin-screw feeder according to claim 3, characterized in that: The bottom surface of the base (1) is provided with several supporting rubber blocks (19).

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