Fruit and vegetable quantitative weighing device

Abstract

The utility model belongs to fruit and vegetable freeze-drying processing technical field, concretely relates to a fruit and vegetable quantitative weighing device, including frame, install controller and weighing module on the frame, and weighing module includes cross bar, and the bolt screw thread connection weighing sensor that installs both ends of cross bar, and weighing sensor is fixedly established on the frame, and the main shaft in continuous discharge frame is rotatably installed on weighing module, and continuous discharge frame is located vertically below spiral feeder discharge gate, and the outside of main shaft is provided with a plurality of sub -packaging groove even along the axis of main shaft, and the driven gear in drive assembly is fixedly arranged to one end of main shaft, and driven gear engages and connects driving gear, and driving gear transmission connects motor. When weighing module detects that the freeze-dried fruit and vegetable collected in sub -packaging groove reaches the set threshold value, the controller controls the movement of the drive assembly to drive the continuous discharge frame to select a certain angle, and the quantitatively collected material is discharged, and the collected material is weighed again, effectively improving the continuity of weighing and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of fruit and vegetable freeze-drying processing technology, specifically relating to a quantitative weighing device for fruits and vegetables. Background Technology

[0002] Freeze-dried fruits and vegetables are increasingly used in the food processing industry due to their crisp texture and complete nutrient retention. The "quantitative weighing-packaging" process in their production directly affects the consistency of product specifications and production efficiency. Currently, quantitative weighing of freeze-dried fruits and vegetables mainly relies on two types of equipment, both of which have significant problems with insufficient continuity and are difficult to adapt to the needs of continuous industrial production. One type is intermittent manually assisted weighing equipment, where freeze-dried fruits and vegetables are manually poured into the electronic scale hopper, and then manually unloaded to the packaging stage after reaching the set weight. This method has the following limitations: First, manual operation has a slow response time, a long single weighing-unloading cycle, insufficient hourly processing capacity, and low efficiency; second, freeze-dried fruits and vegetables are light and easily scattered, and manual unloading easily causes material loss; third, individual differences in manual operation lead to large fluctuations in weighing accuracy, requiring additional re-inspection and rework. Another type is semi-automatic mechanical weighing equipment, which adopts a "single hopper + electromagnetic valve unloading" structure. It uses a weighing sensor to detect the weight of the material in the hopper, and opens the valve to unload the material after the weight reaches the target. However, this equipment still does not solve the continuity problem: feeding must be paused during unloading, and feeding can only resume after the valve closes and the hopper resets. The interruption time is relatively long, and the improvement in production efficiency is limited. More importantly, freeze-dried fruits and vegetables have a fluffy and porous nature, and they are easy to leave residue on the inner wall of the hopper during unloading, forming "wall-mounted material accumulation". This leads to the accumulation of subsequent weighing errors, requiring frequent shutdowns for cleaning, and further interrupting the production process. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a quantitative weighing device for fruits and vegetables, which solves the problems that existing quantitative weighing equipment for freeze-dried fruits and vegetables either suffers from low efficiency and poor accuracy due to intermittent operation, or requires interruption of unloading and is prone to material accumulation, or is susceptible to mechanical interference and has a complex structure, making it difficult to meet the efficiency and accuracy requirements of continuous production.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a quantitative weighing device for fruits and vegetables, comprising a frame, on which a controller and a weighing module are mounted. The weighing module includes a crossbar, with bolts installed at both ends of the crossbar. The bottom end of each bolt is threadedly connected to the internal threaded hole of the loading shaft of a weighing sensor. The outer flange of the weighing sensor is fixed to the frame by bolts. A connecting seat is fixed on the crossbar, and a main shaft of a continuous unloading rack is rotatably mounted in the connecting seat. The continuous unloading rack is located vertically below the discharge port of a screw feeder. Multiple dispensing slots are evenly arranged around the axis of the main shaft on its outer side. Each dispensing slot is formed by two side plates fixed at intervals along the axial direction of the main shaft and multiple V-shaped plates connecting the inner walls of the two side plates and evenly arranged around the axis of the main shaft. A driven gear in a drive assembly is fixed at one end of the main shaft. The driven gear meshes with a drive gear, which is fixed on the output shaft of a motor.

[0005] The beneficial effects of this utility model are as follows: when the weighing module detects that the freeze-dried fruits and vegetables collected in the dispensing tank have reached the set threshold, the controller controls the drive component to move and drive the continuous unloading rack to select a certain angle to release the quantitatively collected material, and then weighs and collects the material again in quantitative terms, which effectively improves the continuity of weighing and increases production efficiency.

[0006] To avoid affecting the weighing accuracy of the weighing module due to the drive components; As a further improvement to the above technical solution: the motor is fixed on the second bracket, the second bracket is fixed on the frame, and both the driving gear and the driven gear are nylon gear structures.

[0007] The beneficial effects of this improvement are: under low load and low speed conditions when dispensing and conveying freeze-dried fruits and vegetables, the driven gear and the drive gear can maintain smooth rotation and stable meshing, avoiding the use of gear lubricating oil which would increase the load on the driven gear and affect the weighing accuracy of the weighing module.

[0008] To avoid affecting the meshing stability of the drive gear and driven gear when the continuous unloading rack moves downward under increased load; As a further improvement to the above technical solution: the weighing sensor is a spoke-type weighing sensor, the axis of the bolt is parallel to the plane connecting the axes of the driving gear and the driven gear, the driving gear is located vertically above the driven gear, and the full-scale deformation distance of the weighing sensor is 0.025-0.076mm.

[0009] The beneficial effects of this improvement are as follows: by adopting the standard spoke-type load cell of the LCHD series, the drive gear and the driven gear can always maintain a stable meshing transmission when the load cell produces a slight downward displacement of 0.025-0.076mm due to the increase in weight of the continuous unloading rack.

[0010] To ensure a stable connection between the crossbar and the load cell; As a further improvement to the above technical solution: the crossbar has a through hole for a sliding bolt, the head end of the bolt is pressed against the top surface of the crossbar, and the bolt is threaded with a nut, which is pressed against the bottom surface of the crossbar.

[0011] The beneficial effects of this improvement are: the bolt and nut securely connect the crossbar, ensuring the stability of the connection between the crossbar and the load cell.

[0012] In order to achieve accurate positioning of the rotation angle of the continuous unloading rack; As a further improvement to the above technical solution: the side plate has a protruding positioning plate on both sides of the V-shaped plate, the frame is equipped with a position monitoring component, the position monitoring component includes a bracket, the bracket is equipped with a proximity switch, the optical axis of the proximity switch is perpendicular to the circumference of the circle where the center points of multiple positioning plates are located, the controller includes a PLC, a relay and a switch, the PLC in the controller is electrically connected to the proximity switch, and the relay in the controller is electrically connected to the motor and the motor of the screw feeder.

[0013] The beneficial effects of this improvement are: the proximity switch can determine the position of the V-shaped plate by sensing the position of the positioning plate, so that the controller can accurately and automatically control the rotation angle of the drive component and the feeding status of the screw feeder, so as to stably support the freeze-drying of fruits and vegetables.

[0014] In order to ensure that the continuous unloading rack unloads the material neatly during rotation; As a further improvement to the above technical solution: a guide frame is installed on the frame, the guide frame includes a vertical plate, the two ends of the vertical plate are respectively welded to the frame and the guide plate, the guide plate is an arc plate structure, and the axis of the guide plate is collinear with the axis of the main shaft and the side plate, and the end of the V-shaped plate is slidably connected to the inner wall of the guide plate.

[0015] The beneficial effects of this improvement are: the guide plate plays a guiding role, allowing the material in the dispensing tank to be released from the slot formed between the bottom of the guide plate and the V-shaped plate, which facilitates the collection of materials.

[0016] To ensure the stability of the frame's support for the various components of the device; As a further improvement to the above technical solution: the frame is a frame structure composed of multiple channel steels welded together.

[0017] The beneficial effects of this improvement are: the frame is made of welded channel steel, which can provide stable support for all components of the device.

[0018] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the weighing module in this utility model; Figure 4 This is a cross-sectional view of the continuous unloading rack in this utility model; In the diagram: 1. Frame; 2. Controller; 3. Weighing module; 31. Crossbar; 32. Connecting seat; 33. Weighing sensor; 34. Bolt; 35. Nut; 4. Continuous unloading rack; 40. Dispensing slot; 41. Main shaft; 42. Side plate; 43. V-shaped plate; 44. Positioning plate; 5. Guide rack; 51. Vertical plate; 52. Guide plate; 6. Position monitoring component; 61. Bracket 1; 62. Proximity switch; 7. Drive component; 71. Bracket 2; 72. Motor; 73. Drive gear; 74. Driven gear. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0021] Example 1: like Figure 1As shown in Figure 4: A quantitative weighing device for fruits and vegetables includes a frame 1. A controller 2 and a weighing module 3 are mounted on the frame 1. The weighing module 3 includes a crossbar 31, with bolts 34 installed at both ends of the crossbar 31. The bottom end of the bolts 34 is threaded to the internal threaded hole of the loading shaft of a weighing sensor 33. The outer flange of the weighing sensor 33 is fixed to the frame 1 by bolts. A connecting seat 32 is fixed on the crossbar 31. The main shaft 41 of a continuous unloading rack 4 is rotatably mounted in the connecting seat 32. The continuous unloading rack 4 is located vertically below the discharge port of a screw feeder. The outer side of the main shaft 41 is evenly provided with multiple dispensing slots 40 around the axis of the main shaft 41. Each dispensing slot 40 is formed by two side plates 42 fixedly at intervals on the main shaft 41 along the axial direction of the main shaft 41, and multiple V-shaped plates 43 connecting the inner walls of the two side plates 42 and evenly arranged around the axis of the main shaft 41. One end of the main shaft 41 is fixedly provided with a driven gear 74 from the drive assembly 7. The driven gear 74 meshes with a drive gear 73, which is fixed on the output shaft of the motor 72. When the weighing module 3 detects frozen food collected in the dispensing slot 40... When the dried fruits and vegetables reach the set threshold, the controller 2 controls the drive assembly 7 to move and drive the continuous unloading rack 4 to select a certain angle to release the quantitatively collected material, and then immediately weigh and collect the material again in quantitative terms, effectively improving the continuity of weighing and increasing production efficiency. The motor 72 is fixed on the bracket 71, and the bracket 71 is fixed on the frame 1. Both the drive gear 73 and the driven gear 74 are nylon gear structures. Under the low load and low speed conditions of dispensing and conveying freeze-dried fruits and vegetables, the driven gear 74 and the drive gear 73 can maintain smooth rotation and stable meshing, avoiding the use of gear lubrication. The lubricating oil increases the load on the driven gear 74, affecting the weighing accuracy of the weighing module 3. The weighing sensor 33 is a spoke-type weighing sensor. The axis of the bolt 34 is parallel to the plane connecting the axes of the drive gear 73 and the driven gear 74. The drive gear 73 is located vertically above the driven gear 74. The full-scale deformation distance of the weighing sensor 33 is 0.025-0.076mm. By using a standard spoke-type weighing sensor from the LCHD series, the weighing sensor 33 will experience a downward deformation of 0.025-0.076mm due to the increased weight of the continuous unloading rack 4.At a micro-displacement of 0.76mm, the drive gear 73 and the driven gear 74 can always maintain a stable meshing transmission. A through hole for a sliding insert bolt 34 is provided on the crossbar 31. The head of the bolt 34 is pressed against the top surface of the crossbar 31. A nut 35 is threaded onto the bolt 34, and the nut 35 is pressed against the bottom surface of the crossbar 31. The bolt 34 and nut 35 securely connect the crossbar 31, ensuring the stability of the connection between the crossbar 31 and the load cell 33. Positioning plates 44 protrude from the side plates 42 on both sides of the V-shaped plate 43. A position monitoring component 6 is installed on the frame 1. The position monitoring component 6 includes a bracket 61, on which a proximity switch 62 is installed. The optical axis of the proximity switch 62 is perpendicular to the circumference of the circle containing the center points of multiple positioning plates 44. The controller 2 includes a PLC, relays, and switches. The PLC in the controller 2 is electrically connected to the proximity switch 62. The relay in controller 2 is electrically connected to motor 72 and the motor of the screw feeder. Proximity switch 62 can determine the position of V-shaped plate 43 by sensing the position of positioning plate 44, enabling controller 2 to accurately and automatically control the rotation angle of drive assembly 7 and the feeding state of the screw feeder to stably support the freeze-drying of fruits and vegetables. A guide frame 5 is installed on the frame 1. The guide frame 5 includes a vertical plate 51, with its two ends welded to the frame 1 and the guide plate 52, respectively. 2 is an arc-shaped plate structure, and the axis of the guide plate 52 is collinear with the axes of the main shaft 41 and the side plate 42. The inner wall of the guide plate 52 is slidably connected to the end of the V-shaped plate 43. The guide plate 52 plays a guiding role, allowing the material in the dispensing trough 40 to be released through the slot formed between the bottom end of the guide plate 52 and the V-shaped plate 43, facilitating material collection. The frame 1 is a frame structure welded from multiple channel steels. The entire frame 1 is welded from channel steels, providing stable support for all components of the device.

[0022] The working principle of this technical solution is as follows: the PLC of the controller 2 sets the parameters: input the quantitative threshold of freeze-dried fruits and vegetables - such as 20g / portion, the rotation angle of the motor 72 - such as the interval angle between adjacent dispensing tanks 40 is 90°, the feeding speed of the screw feeder - adjusted according to the fluffiness of the material, and calibrate the sensing distance between the proximity switch 62 and the positioning plate 44. The screw feeder and main switch are activated. Freeze-dried fruits and vegetables fall from the feeder outlet into the dispensing trough 40 at the top of the continuous unloading rack 4. The weighing module 3 monitors the material weight in real time: the spoke-type load cell 33 converts the weight signal into an electrical signal and transmits it to the controller 2. The PLC continuously compares the measured value with the set threshold. When the material weight reaches the threshold, the controller 2 immediately sends a command: stop the screw feeder from feeding, and simultaneously start the motor 72 to drive the drive gear 73 to rotate, which in turn drives the driven gear 74 and the main shaft 41 to rotate synchronously. During the rotation of the main shaft, the proximity switch 62 senses the position of the load cell. The position of the plate 44 provides real-time feedback on the rotation angle. When the rotation reaches the set angle, the PLC controls the motor to stop. At this time, the filled dispensing slot 40 rotates to the inside of the guide frame 5, and the V-shaped plate 43 slides along the inner wall of the guide plate 52. Under the influence of gravity and the guide plate, the material is neatly discharged from the bottom slot of the guide plate to the packaging container below. At the same time, the adjacent empty dispensing slot 40 rotates to the outlet of the screw feeder. The controller 2 restarts the screw feeder after a 2-3 second delay to ensure that the material is completely discharged and to start the next round of quantitative weighing, achieving a seamless connection between "unloading and weighing".

[0023] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the invention; these examples are merely for the purpose of helping to understand the method and core ideas of the invention. The above descriptions are only preferred embodiments of the invention. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of the invention, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this invention.

Claims

1. A quantitative weighing device for fruits and vegetables, characterized in that: The system includes a frame (1), on which a controller (2) and a weighing module (3) are mounted. The weighing module (3) includes a crossbar (31), with bolts (34) installed at both ends of the crossbar (31). The bottom end of the bolts (34) is threaded to the internal thread hole of the loading shaft of the load cell (33). The outer flange of the load cell (33) is fixed to the frame (1) by bolts. A connecting seat (32) is fixed on the crossbar (31). The main shaft (41) of the continuous unloading rack (4) is rotatably installed in the connecting seat (32). The continuous unloading rack (4) is located at the discharge port of the screw feeder. Vertically below, a plurality of sub-packing slots (40) are evenly arranged around the axis of the main shaft (41) on the outer side. The sub-packing slots (40) are formed by two side plates (42) fixed at intervals on the main shaft (41) along the axial direction of the main shaft (41) and a plurality of V-shaped plates (43) that connect the inner walls of the two side plates (42) and are evenly arranged around the axis of the main shaft (41). One end of the main shaft (41) is fixed with a driven gear (74) in the drive assembly (7). The driven gear (74) meshes with the drive gear (73). The drive gear (73) is fixed on the output shaft of the motor (72).

2. The quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: The motor (72) is fixed on the bracket (71), which is fixed on the frame (1). The drive gear (73) and the driven gear (74) are both nylon gear structures.

3. The quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: The weighing sensor (33) is a spoke-type weighing sensor. The axis of the bolt (34) is parallel to the plane connecting the axes of the drive gear (73) and the driven gear (74). The drive gear (73) is located vertically above the driven gear (74). The full-scale deformation distance of the weighing sensor (33) is 0.025-0.076 mm.

4. The quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: The crossbar (31) has a through hole for a sliding insert bolt (34). The head of the bolt (34) is pressed against the top surface of the crossbar (31). The bolt (34) is threaded with a nut (35), and the nut (35) is pressed against the bottom surface of the crossbar (31).

5. A quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: The side plate (42) is located on both sides of the V-shaped plate (43) and a positioning plate (44) is protruding. The frame (1) is equipped with a position monitoring component (6). The position monitoring component (6) includes a bracket (61). A proximity switch (62) is installed on the bracket (61). The optical axis of the proximity switch (62) is perpendicular to the circumference of the circle where the center point of the multiple positioning plates (44) is located. The controller (2) includes a PLC, a relay and a switch. The PLC in the controller (2) is electrically connected to the proximity switch (62). The relay in the controller (2) is electrically connected to the motor (72) and the motor of the screw feeder.

6. The quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: A guide frame (5) is installed on the frame (1). The guide frame (5) includes a vertical plate (51). The two ends of the vertical plate (51) are welded to the frame (1) and the guide plate (52) respectively. The guide plate (52) is an arc-shaped plate structure. The axis of the guide plate (52) is collinear with the axis of the main shaft (41) and the side plate (42). The inner wall of the guide plate (52) is slidably connected to the end of the V-shaped plate (43).

7. The quantitative weighing device for fruits and vegetables according to claim 1, characterized in that: The frame (1) is a frame structure composed of multiple channel steels welded together.

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