Metering mechanism for a feed weigher

Abstract

The utility model relates to the field of feeding weighing equipment, concretely relates to a kind of metering mechanism for feeding weighing machine, including weighing hopper and weighing assembly, the inner wall of weighing hopper is arranged as inclined surface, the circumferential outer wall of weighing hopper is fixedly connected with connecting lug seat, the connecting lug seat is supported on ground by weighing assembly, the weighing assembly includes support column and connecting column, the upper end of support column is fixedly connected with the bottom edge of connecting lug seat, the lower end of support column is fixedly connected with weighing sensor, the bottom of weighing sensor is fixedly connected with ball joint, the top of connecting column is fixedly connected with ball seat. By being provided with the spherical pair structure of ball joint and ball seat, multi-angle self-adaptive adjustment can be realized, additional bending moment generated due to material impact, ground subsidence or hopper deformation can be effectively released, ball joint can freely rotate in ball seat, ensure that weighing sensor always maintains vertical stress state, avoid uneven stress of strain gauge.

Description

Technical Field

[0001] This utility model relates to the field of feeding and weighing equipment, specifically to a measuring mechanism for a feeding and weighing machine. Background Technology

[0002] In industries such as chemical, food, pharmaceutical, and building materials, the accurate measurement of materials directly determines the quality stability of the final product and the controllability of production costs. Feeding and weighing machines are key equipment for realizing quantitative material conveying and weighing, and the performance of their measuring mechanisms directly affects production efficiency, product quality, and cost control.

[0003] Existing weighing and metering mechanisms mostly adopt a single-point suspension or three-point support structure, directly connecting the hopper and the frame through a load cell. However, there are some drawbacks in practical applications: when the material falls from the feeder outlet, it directly impacts the inner wall of the hopper, easily causing the hopper to shake or vibrate, resulting in fluctuations in the output signal of the load cell and affecting weighing accuracy. At the same time, vibrations from material discharge or the external environment can easily be transmitted back to the weighing system through the support structure, easily causing the load cell's force angle to shift, interfering with the weighing process, and producing large measurement errors.

[0004] Therefore, it is necessary to invent a metering mechanism for a feeding and weighing machine to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a metering mechanism for a feeding and weighing machine. By setting a spherical pair structure with a ball joint and a ball seat, it can solve the problem in the prior art where the shaking or vibration of the hopper affects the weighing accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metering mechanism for a feeding weighing machine, comprising a weighing hopper and a weighing assembly, wherein the inner wall of the weighing hopper is set as an inclined surface, and a connecting lug is fixedly connected to the outer circumferential wall of the weighing hopper, the connecting lug being supported on the ground by the weighing assembly, the weighing assembly comprising a support column and a connecting column, the upper end of the support column being fixedly connected to the bottom edge of the connecting lug, a weighing sensor being fixedly connected to the lower end of the support column, a ball joint hinge being fixedly connected to the bottom of the weighing sensor, a ball seat being fixedly connected to the top of the connecting column, the ball joint hinge being embedded inside the ball seat, an elastic damping pad being fixedly connected to the bottom of the connecting column, and an annular sleeve being threadedly connected to the circumferential surface of the connecting column.

[0007] Preferably, the bottom of the weighing hopper has an inverted conical structure, and a discharge pipe is fixedly connected to the bottom of the weighing hopper.

[0008] Preferably, the inner wall of the weighing hopper is covered with a wear-resistant and noise-reducing lining, which is composed of multiple ceramic tiles spliced ​​together.

[0009] Preferably, the axis of the discharge pipe is collinear with the central axis of the weighing hopper, and a discharge control valve is provided on the discharge pipe. The input end of the discharge control valve faces the inlet of the discharge pipe, and the output end of the discharge control valve faces the outlet of the discharge pipe.

[0010] Preferably, the surface of the ball seat is provided with a plurality of integrally formed covering pieces, the covering pieces being elastic and evenly distributed on the top of the ball seat, and the top edge of the annular sleeve being provided with a bevel.

[0011] Preferably, it also includes an electrical control box, which is located on the right side of the weighing hopper. The electrical control box is equipped with a main controller, and the side wall of the electrical control box is equipped with heat dissipation louvers, a touch screen display, and an emergency stop button. The main controller of the electrical control box is electrically connected to the weighing sensor.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This utility model features a spherical joint structure with a ball joint hinge and a ball seat, enabling multi-angle adaptive adjustment. It effectively releases additional bending moments caused by material impact, ground settlement, or hopper deformation. The ball joint hinge can rotate freely within the ball seat, ensuring that the load cell always maintains a vertical load-bearing state, avoiding uneven stress on the strain gauges. The elastic damping pad at the bottom of the connecting column absorbs environmental vibration energy. Vibrations generated by the crusher's operation in the workshop are isolated by the elastic damping pad, reducing the amplitude of vibration transmitted to the load cell and preventing interference from environmental vibrations on the weight signal, thus ensuring weighing stability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2 This is a three-dimensional structural diagram of the entire invention from another perspective; Figure 3 This is a three-dimensional cross-sectional view of the weighing component in this utility model; Figure 4 This is an exploded three-dimensional structural diagram of the weighing component in this utility model.

[0015] Legend: 11. Weighing hopper; 12. Connecting lug; 2. Weighing assembly; 21. Support column; 22. Weighing sensor; 23. Ball joint hinge; 24. Connecting column; 25. Ball seat; 251. Covering sheet; 26. Elastic damping pad; 27. Annular sleeve; 271. Inclined surface; 31. Discharge pipe; 32. Discharge control valve; 33. Electrical control box. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1 - Figure 3 The metering mechanism for a feeding weighing machine shown includes a weighing hopper 11 and a weighing assembly 2. The weighing hopper 11 is located below the discharge port of the feeding weighing machine and is used to hold the material to be weighed. The inner wall of the weighing hopper 11 is set as an inclined surface to guide the material to fall along the central axis and reduce the impact on the inner wall of the weighing hopper 11. A connecting lug 12 is fixedly connected to the outer circumferential wall of the weighing hopper 11. The connecting lug 12 is supported on the ground by the weighing assembly 2. The weighing assembly 2 includes a support column 21 and a connecting column 24. The upper end of the support column 21 is fixed to the bottom edge of the connecting lug 12. The connection includes a load cell 22 fixedly connected to the lower end of the support column 21, with the detection ends of the load cell 22 all facing upwards. A ball joint hinge 23 is fixedly connected to the bottom of the load cell 22. A ball seat 25 is fixedly connected to the top of the connecting column 24, with the ball joint hinge 23 embedded inside the ball seat 25, forming a freely swingable spherical pair to accommodate small displacements during the weighing process and release additional bending moments. An elastic damping pad 26, made of rubber or polyurethane material, is fixedly connected to the bottom of the connecting column 24 to isolate the transmission of external environmental vibrations to the weighing system. like Figure 3 and Figure 4 As shown, the circumferential surface of the connecting column 24 is threaded with an annular sleeve 27, and the surface of the ball seat 25 is provided with multiple integrally formed covering pieces 251. The covering pieces 251 are elastic and evenly distributed on the top of the ball seat 25, and are evenly distributed along the circumference, and have radial elastic deformation capability. The top edge of the annular sleeve 27 is provided with a bevel 271. The bevel 271 of the annular sleeve 27 is used to press the covering piece 251 of the ball seat 25, so that when the annular sleeve 27 is screwed upward along the connecting column 24, its bevel 271 contacts the elastic covering piece 251 and applies radial pressure, causing the elastic covering piece 251 to retract inward, thereby pressing the ball head of the ball head hinge 23 into the ball seat 25, forming an adjustable preload anti-loosening ball hinge structure.

[0018] like Figure 1 and Figure 2As shown, the bottom of the weighing hopper 11 has an inverted conical structure. A discharge pipe 31 is fixedly connected to the bottom of the weighing hopper 11, and its inlet extends into the central area of ​​the bottom of the weighing hopper 11. The inner wall of the weighing hopper 11 is covered with a wear-resistant and noise-reducing lining. The wear-resistant and noise-reducing lining is made of multiple ceramic tiles spliced ​​together and fixed by countersunk screws. It is used to reduce material impact noise and extend the wear resistance of the hopper. The axis of the discharge pipe 31 is collinear with the central axis of the weighing hopper 11. A discharge control valve 32 is installed on the discharge pipe 31. The input end of the discharge control valve 32 faces the inlet of the discharge pipe 31, and the output end of the discharge control valve 32 faces the outlet of the discharge pipe 31. The discharge control valve 32 is a pneumatic or electric butterfly valve, used to control the timed discharge of materials.

[0019] like Figure 1 and Figure 2 As shown, it also includes an electrical control box 33, which is located on the right side of the weighing hopper 11. The electrical control box 33 is equipped with a main controller, and the side wall of the electrical control box 33 is equipped with heat dissipation louvers, a touch display screen and an emergency stop button. The main controller of the electrical control box 33 is electrically connected to the weighing sensor 22, and is used to receive weight signals, execute weighing logic control, and output control commands to the discharge control valve 32.

[0020] The working principle of this utility model is as follows: During use, the upstream feeding equipment feeds the material from the discharge port into the weighing hopper 11. Since the inner wall of the weighing hopper 11 is inclined and has an overall inverted conical structure, the material slides smoothly along the inner wall to the bottom center area under the action of gravity. This effectively avoids the off-center loading phenomenon caused by the material directly impacting the side wall of the hopper, reduces the dynamic interference of the weighing system, and improves the stability of the initial stage of weighing.

[0021] The impact force generated during the material's fall is transmitted through the weighing hopper 11 to the connecting lug 12 fixed to its outer wall, and then through the support column 21 to the weighing sensor 22. The detection end of the weighing sensor 22 faces upward and directly bears the compressive load from above, converting the material weight into an electrical signal and transmitting it to the main controller in the electrical control box 33 in real time. During this process, if the weighing system experiences slight swaying or structural stress due to material impact or external environmental vibration, the spherical pair formed by the ball joint hinge 23 and the ball seat 25 in the weighing assembly 2 can rotate freely and sway slightly, releasing the additional bending moment caused by installation errors, thermal expansion and contraction, or asymmetric impact, preventing stress concentration from damaging the weighing sensor 22, and ensuring weighing accuracy and equipment lifespan.

[0022] Meanwhile, the elastic damping pad 26 at the bottom of the connecting column 24 contacts the ground, forming an effective vibration isolation layer that can absorb and attenuate mechanical vibrations from the ground, prevent external interference signals from entering the weighing system, and further improve weighing stability.

[0023] By rotating the annular sleeve 27, it can move upward along the thread of the connecting column 24. The inclined surface 271 of its top edge gradually presses the elastic covering piece 251 on the top of the ball seat 25, causing it to retract inward. This firmly presses the ball head of the ball head hinge 23 into the ball seat 25. During normal operation of the equipment, the annular sleeve 27 can be tightened appropriately to improve the support rigidity and suppress excessive shaking. When the equipment is maintained or the sensor is replaced, the annular sleeve 27 can be loosened in the opposite direction to release the clamping force, which facilitates the disassembly and replacement of the ball head hinge 23 and greatly improves the maintainability of the equipment.

[0024] After weighing is completed, the main controller issues a command to open the discharge control valve 32 on the discharge pipe 31. The material is discharged through the discharge pipe 31 under the action of gravity. Since the axis of the discharge pipe 31 is collinear with the central axis of the weighing hopper 11, the discharge is smooth and not easy to block or leave residue, ensuring the accuracy of the next weighing.

[0025] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A metering mechanism for a feeding weighing machine, characterized in that, The weighing assembly includes a weighing hopper (11) and a weighing component (2). The inner wall of the weighing hopper (11) is set as an inclined surface. A connecting lug (12) is fixedly connected to the outer circumferential wall of the weighing hopper (11). The connecting lug (12) is supported on the ground by the weighing component (2). The weighing component (2) includes a support column (21) and a connecting column (24). The upper end of the support column (21) is fixedly connected to the bottom edge of the connecting lug (12). A weighing sensor (22) is fixedly connected to the lower end of the support column (21). A ball joint hinge (23) is fixedly connected to the bottom of the weighing sensor (22). A ball seat (25) is fixedly connected to the top of the connecting column (24). The ball joint hinge (23) is embedded inside the ball seat (25). An elastic damping pad (26) is fixedly connected to the bottom of the connecting column (24). An annular sleeve (27) is threadedly connected to the circumferential surface of the connecting column (24).

2. The metering mechanism for a feeding weighing machine according to claim 1, characterized in that: The bottom of the weighing hopper (11) is an inverted cone shape, and the bottom of the weighing hopper (11) is fixedly connected to the discharge pipe (31).

3. The metering mechanism for a feeding weighing machine according to claim 1, characterized in that: The inner wall of the weighing hopper (11) is covered with a wear-resistant and noise-reducing lining, which is made of multiple ceramic tiles spliced ​​together.

4. The metering mechanism for a feeding weighing machine according to claim 2, characterized in that: The axis of the discharge pipe (31) is collinear with the central axis of the weighing hopper (11). A discharge control valve (32) is provided on the discharge pipe (31). The input end of the discharge control valve (32) faces the inlet of the discharge pipe (31), and the output end of the discharge control valve (32) faces the outlet of the discharge pipe (31).

5. The metering mechanism for a feeding weighing machine according to claim 1, characterized in that: The ball seat (25) has a plurality of integrally formed covering pieces (251) on its surface. The covering pieces (251) are elastic and evenly distributed on the top of the ball seat (25). The top edge of the annular sleeve (27) is provided with a bevel (271).

6. The metering mechanism for a feeding weighing machine according to claim 1, characterized in that: It also includes an electrical control box (33), which is located on the right side of the weighing hopper (11). The electrical control box (33) is equipped with a main controller inside. The side wall of the electrical control box (33) is equipped with heat dissipation louvers, a touch screen and an emergency stop button. The main controller of the electrical control box (33) is electrically connected to the weighing sensor (22).

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