A food weighing device for food testing

Abstract

This utility model discloses a food weighing device for food testing, belonging to the technical field of weighing devices. It includes a roller conveyor and electric rollers. Multiple sets of electric rollers with equal spacing are arranged in the middle of the roller conveyor, and the electric rollers and the roller conveyor are powered by two different sources. An electronic scale is installed between the sets of electric rollers. A leveling box is installed at the bottom of the roller conveyor. A servo motor is located at the center of the leveling box. A drive shaft is installed at the output end of the servo motor, and a drive gear is fitted on the surface of the drive shaft. Limiting slide rails are provided inside the leveling box on both sides of the servo motor, and racks are provided on both sides of the drive gear. This utility model not only achieves centering and leveling of the tray to prevent tray tilting during weighing, facilitating the sequential input and weighing of food and the rejection of substandard food, but also improves the convenience of batch weighing of food.

Description

Technical Field

[0001] This utility model relates to the field of weighing device technology, specifically a food weighing device for food testing. Background Technology

[0002] Food inspection is a discipline that uses physical, chemical, and biochemical principles to test the quality of food raw materials, auxiliary materials, semi-finished products, finished products, and by-products. It encompasses sensory testing, nutritional analysis, and the detection of additives and harmful substances. Methods include chromatography and spectroscopy, involving the testing of inorganic and organic components. Surface-enhanced Raman spectroscopy is used for the rapid detection of substances such as melamine and Sudan Red. Before testing food, it needs to be weighed. Traditionally, the food to be tested is weighed manually on a scale, with any items not meeting the weight requirement being manually removed. However, this method is inefficient for batch testing scenarios. To improve this, a food weighing device for food testing is proposed.

[0003] For example, a food weighing device for food testing disclosed in authorization announcement number CN222027768U includes a guide trough, which is angled. The inner wall of the guide trough is symmetrically fixedly connected with supporting bosses. A first connecting plate is fixedly connected to the middle of the outer wall of the guide trough. A rotating shaft is mounted on the surface of the first connecting plate through a bearing. A lever is mounted on the top of the rotating shaft, and multiple levers are arranged in the radial position of the rotating shaft. A disc is mounted on the bottom of the rotating shaft.

[0004] Although it achieves the goal of using the elastic force of the tension spring to reset the swing arm, the locking connector engages with the next locking slot, and the lever positions the next solid food item. At this time, the sliding solid food item comes to the support plate through the receiving plate, and the solid food item is weighed by the weighing sensor. This can effectively prevent the solid food item from breaking during the conveying process, and is suitable for fragile solid food items.

[0005] However, the existing weighing devices do not solve the problem that they are not conducive to centering and straightening the pallet to prevent it from tilting during weighing, nor to the sequential input and weighing of food and the rejection of food that does not meet the weight requirements, thus affecting the convenience of batch weighing of food. Utility Model Content

[0006] The purpose of this invention is to provide a food weighing device for food testing, in order to solve the problems mentioned in the background art, such as the difficulty in centering and straightening the tray to prevent the tray from tilting during weighing, which is not conducive to the sequential input and weighing of food and the rejection of food with unqualified weight, thus affecting the convenience of batch weighing of food.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A food weighing device for food testing includes a roller conveyor and electric rollers. Multiple sets of electric rollers with equal spacing are arranged in the middle of the roller conveyor, and the electric rollers and the roller conveyor belong to two different power sources. An electronic scale is arranged between the multiple sets of electric rollers. A leveling box is arranged at the bottom of the roller conveyor. A servo motor is arranged at the center of the leveling box. A drive shaft is installed at the output end of the servo motor, and a drive gear is fitted on the surface of the drive shaft. Limit rails are arranged inside the leveling box on both sides of the servo motor. Racks are arranged on both sides of the drive gear, and the racks mesh with the drive gear and are slidably connected to the limit rails.

[0008] Optionally, each rack has a connecting frame on its side wall, and the connecting frame is slidably connected to the leveling box.

[0009] Optionally, a sizing frame is provided at the end of the connecting frame away from the sizing box, and multiple sets of equidistant sizing wheels are movably installed inside the sizing frame.

[0010] Optionally, a lifting seat is provided at the bottom of the roller conveyor on one side of the aligning box, and a second cylinder is provided inside the lifting seat.

[0011] Optionally, a second push arm is installed at the output end of the second cylinder, and the second push arm is connected to the electronic scale.

[0012] Optionally, sleeves are provided inside the lifting seats on both sides of the second cylinder, and slide rods are slidably provided inside the sleeves, and the slide rods are connected to the electronic scale.

[0013] Optionally, the top of the roller conveyor is provided with a placement plate, a first cylinder is provided on the side wall of the placement plate, and a tray is provided on the surface of the roller conveyor.

[0014] Optionally, a first push arm is installed at the output end of the first cylinder, and a push plate is provided at the end of the first push arm away from the first cylinder.

[0015] Optionally, limit rods are provided on the sidewalls of the push plates on both sides of the first push arm, and the limit rods are slidably connected to the placement plate.

[0016] Optionally, a discharge slope is provided on the side wall of the roller conveyor, and a PLC controller is provided on the side wall of the roller conveyor on one side of the discharge slope. The output terminal of the PLC controller is electrically connected to the input terminal of the electronic scale, the electric roller, the first cylinder, the second cylinder, and the servo motor.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the weighing device not only realizes the centering and straightening of the tray to prevent the tray from tilting during weighing, which facilitates the sequential input and weighing of food and the rejection of food that does not meet the weight requirements, but also improves the convenience of batch weighing of food.

[0018] The food items to be weighed are placed in batches on a pallet. A roller conveyor moves the pallet and food items from right to left. When the pallet moves between two sets of leveling frames, the servo motor is activated. The servo motor drives the drive gear through the drive shaft, which in turn drives two sets of racks to move towards each other. The racks then drive the connecting frame to move towards each other, which in turn drives the leveling frame and leveling wheel closer together, bringing the leveling wheel into contact with the outer wall of the pallet. The two sets of leveling frames then center and clamp the pallet, causing it to swing to the center position on the roller conveyor surface. The roller conveyor provides power to the pallet. With the movement of the leveling wheel, the pallet moves above the electronic scale. The width of the pallet is greater than the width of the electronic scale. The pallet is positioned on both sides of the electronic scale. When the photoelectric sensor on the side detects the tray, the roller conveyor stops working. The second cylinder drives the second push arm to move upward, which in turn drives the electronic scale to move upward. The electronic scale then moves the tray and food upward. At this point, the bottom of the tray separates from the electric roller and comes into full contact with the electronic scale. The electronic scale weighs the tray and the food on it. After weighing, the weight data is transmitted to the PLC controller through the processing chip inside the electronic scale. The PLC controller then determines whether the weight of the tray is acceptable. The above operation is repeated sequentially to complete the weighing of the food. This process centers and straightens the tray to prevent it from tilting during weighing, facilitating the sequential input and weighing of food and improving the convenience of batch weighing.

[0019] After weighing, the pallets continue to move under the drive of the electric rollers. If the weight of a group of pallets is not up to standard, when the group of pallets moves to the placement plate, the photoelectric sensor on one side of the placement plate senses the pallet, the roller conveyor stops working, and the first cylinder drives the push plate to move through the first push arm. The push plate moves the group of pallets with unqualified weight and slides down the discharge slope, where they are manually retrieved. Other pallets with qualified weight continue to move to the inspection station under the drive of the roller conveyor, where they are manually inspected, which facilitates the removal of food products with unqualified weight. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a three-dimensional structural diagram of the present invention; Figure 3 This is a frontal cross-sectional view of the present invention. Figure 4 This is a top view of the structure of this utility model; Figure 5 This is a three-dimensional perspective structural diagram of the alignment box of this utility model.

[0022] Figure label: 1. Roller conveyor; 2. Pallet; 3. Alignment wheel; 4. Alignment frame; 5. Electronic scale; 6. Electric roller; 7. Discharge slope; 8. Placement plate; 9. Limiting rod; 10. First cylinder; 11. First push arm; 12. Push plate; 13. PLC controller; 14. Lifting seat; 15. Alignment box; 16. Second cylinder; 17. Second push arm; 18. Slide bar; 19. Sleeve; 20. Drive shaft; 21. Drive gear; 22. Servo motor; 23. Rack; 24. Limiting slide rail; 25. Connecting frame.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] The following is a detailed description of a food weighing device for food testing provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0025] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0026] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0027] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0028] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0029] Please see Figures 1 to 5 This utility model provides an embodiment of a food weighing device for food testing, comprising a roller conveyor 1 and electric rollers 6. Multiple sets of electric rollers 6 are arranged at equal intervals in the middle of the roller conveyor 1, and the electric rollers 6 and the roller conveyor 1 belong to two different power sources. An electronic scale 5 is arranged between the multiple sets of electric rollers 6. A leveling box 15 is arranged at the bottom of the roller conveyor 1, and a servo motor 22 is arranged at the center of the leveling box 15. The servo motor 22 provides power drive, and a drive shaft 2 is installed at the output end of the servo motor 22. 0. The surface of the drive shaft 20 is fitted with a drive gear 21. The interior of the alignment box 15 on both sides of the servo motor 22 is provided with a limit slide rail 24. The drive gear 21 is provided with a rack 23 on both sides, and the rack 23 meshes with the drive gear 21. The rack 23 is slidably connected to the limit slide rail 24. The side wall of the rack 23 is provided with a connecting frame 25, and the connecting frame 25 is slidably connected to the alignment box 15. The end of the connecting frame 25 away from the alignment box 15 is provided with an alignment frame 4. The interior of the alignment frame 4 is movably installed with multiple sets of alignment wheels 3 at equal intervals.

[0030] A lifting seat 14 is provided at the bottom of the roller conveyor 1 on one side of the aligning box 15. A second cylinder 16 is provided inside the lifting seat 14, which serves as the power drive.

[0031] The output end of the second cylinder 16 is equipped with a second push arm 17, and the second push arm 17 is connected to the electronic scale 5.

[0032] Both sides of the second cylinder 16 have a sleeve 19 inside the lifting seat 14. The sleeve 19 has a sliding rod 18 inside it, and the sliding rod 18 is connected to the electronic scale 5.

[0033] In this utility model, the PLC controller 13 is a Siemens S7-200, which is existing technology. Therefore, its internal structure, working principle, and connection and control method with the electrical components in this application will not be described in detail. The food items to be weighed are placed in batches on the tray 2. The PLC controller 13 is operated to start the roller conveyor 1, which drives the tray 2 and the food to move. The tray 2 moves from right to left. When the tray 2 moves between the two sets of leveling frames 4, the servo motor 22 is activated. The servo motor 22 drives the drive gear 21 to rotate via the drive shaft 20. Under the meshing of the drive gear 21 and the rack 23, and the sliding engagement of the rack 23 and the limiting slide rail 24, the drive gear 21 drives the two sets of racks 23 to move towards each other. The racks 23 drive the connecting frame 25 to move towards each other. The connecting frame 25 drives the leveling frame 4 and the leveling wheel 3 to move closer together, causing the leveling wheel 3 to contact the outer wall of the tray 2. The two sets of leveling frames 4 center and clamp the tray 2, causing it to swing to the middle position on the surface of the roller conveyor 1. Power is supplied to tray 2. With the movement of the leveling wheel 3, tray 2 moves above the electronic scale 5. The width of tray 2 is greater than the width of electronic scale 5. Photoelectric sensors on both sides of electronic scale 5 detect tray 2. At this time, roller conveyor 1 stops working and the second cylinder 16 is opened. The second cylinder 16 drives the second push arm 17 to move upward. With the sliding cooperation of slide rod 18 and sleeve 19, the second push arm 17 drives electronic scale 5 to move upward. Electronic scale 5 drives tray 2 and food to move upward. At this time, the bottom surface of tray 2 is separated from electric roller 6 and fully contacts electronic scale 5. Electronic scale 5 weighs tray 2 and the food on tray 2. After weighing, the weight data is transmitted to PLC controller 13 through the processing chip in electronic scale 5. PLC controller 13 determines whether the weight of the group of trays 2 is qualified. Then, the above operation is repeated to complete the weighing of food. This realizes the centering and leveling of the tray to prevent the tray from tilting during weighing, facilitates the sequential input and weighing of food, and improves the convenience of batch weighing of food.

[0034] The top of the roller conveyor 1 is provided with a placement plate 8, and a first cylinder 10 is provided on the side wall of the placement plate 8. The first cylinder 10 plays a power driving role, and a tray 2 is provided on the surface of the roller conveyor 1.

[0035] A first push arm 11 is installed at the output end of the first cylinder 10, and a push plate 12 is provided at the end of the first push arm 11 away from the first cylinder 10.

[0036] Limiting rods 9 are provided on the side walls of the push plates 12 on both sides of the first push arm 11, and the limiting rods 9 are slidably connected to the placement plate 8.

[0037] A discharge slope 7 is provided on the side wall of the roller conveyor 1. A PLC controller 13 is provided on the side wall of the roller conveyor 1 on one side of the discharge slope 7. The output terminal of the PLC controller 13 is electrically connected to the input terminal of the electronic scale 5, the electric roller 6, the first cylinder 10, the second cylinder 16, and the servo motor 22.

[0038] After weighing, the pallet 2 continues to move under the drive of the electric roller 6. If the weight of the pallet 2 is not up to standard, when the pallet 2 moves to the placement plate 8, the photoelectric sensor on one side of the placement plate 8 senses the pallet 2, and the roller conveyor 1 stops working. Then, the PLC controller 13 opens the first cylinder 10, and the first cylinder 10 drives the push plate 12 to move through the first push arm 11. The limit rod 9 provides sliding limit support for the push plate 12. The push plate 12 drives the pallet 2 with the unqualified weight to move and slide down the discharge slope 7, where it is manually retrieved. Other pallets 2 with the qualified weight continue to move to the inspection station under the drive of the roller conveyor 1, where they are manually inspected, which facilitates the removal of food with unqualified weight.

[0039] The working principle of the technical solution provided by this utility model is as follows: Food items to be weighed are placed in batches on tray 2. A roller conveyor 1 drives tray 2 and the food to move. The direction of movement of tray 2 is from right to left. When tray 2 moves between the two sets of leveling frames 4, a servo motor 22 drives a drive gear 21 to rotate via a drive shaft 20. The drive gear 21 drives two sets of racks 23 to move towards each other. The racks 23 drive a connecting frame 25 to move towards each other. The connecting frame 25 causes the leveling frame 4 and the leveling wheel 3 to move closer together, bringing the leveling wheel 3 into contact. Upon reaching the outer wall of tray 2, two sets of aligning frames 4 clamp and center tray 2, causing it to swing to the middle position on the surface of roller conveyor 1. Roller conveyor 1 provides power to tray 2, moving it above electronic scale 5. Since the width of tray 2 is greater than the width of electronic scale 5, photoelectric sensors on both sides of electronic scale 5 detect tray 2. At this point, roller conveyor 1 stops working, and second cylinder 16 drives second push arm 17 upwards. Second push arm 17 then drives electronic scale 5 upwards, which in turn moves tray 2 and the food upwards. At this point, the bottom surface of tray 2 detaches from the electric roller 6 and fully contacts the electronic scale 5. The electronic scale 5 weighs tray 2 and the food on it. After weighing, the weight data is transmitted to the PLC controller 13 through the processing chip inside the electronic scale 5. The PLC controller 13 determines whether the weight of this group of trays 2 is acceptable. The above operation is then repeated to complete the weighing of the food. After weighing, tray 2 continues to move under the drive of the electric roller 6. If the weight of this group of trays 2 is unacceptable, the system will stop when the group of trays 2 moves to the designated location. When plate 8 is placed, the photoelectric sensor on one side of plate 8 senses the tray 2, the roller conveyor 1 stops working, the first cylinder 10 drives the push plate 12 to move through the first push arm 11, and the limit rod 9 provides sliding limit support for the push plate 12. The push plate 12 drives the group of trays 2 with unqualified weight to move and slide down the discharge slope 7, and they are manually retrieved. Other trays 2 with qualified weight continue to move to the inspection station under the drive of the roller conveyor 1, and are manually inspected. The above is the complete usage of the food weighing device for food inspection.

[0040] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A food weighing device for food testing, comprising a roller conveyor and an electric roller, characterized in that: The roller conveyor has multiple sets of equally spaced electric rollers in its middle section, with the electric rollers and the roller conveyor belonging to two different power sources. An electronic scale is installed between the multiple sets of electric rollers. A leveling box is installed at the bottom of the roller conveyor. A servo motor is installed at the center of the leveling box. A drive shaft is installed at the output end of the servo motor. A drive gear is fitted on the surface of the drive shaft. Limit rails are installed inside the leveling box on both sides of the servo motor. A rack is installed on both sides of the drive gear, and the rack meshes with the drive gear. The rack is slidably connected to the limit rail.

2. The food weighing device for food testing according to claim 1, characterized in that: Each rack has a connecting frame on its side wall, and the connecting frame is slidably connected to the leveling box.

3. The food weighing device for food testing according to claim 2, characterized in that: Each end of the connecting frame away from the alignment box is equipped with an alignment frame, and each alignment frame has multiple sets of alignment wheels installed at equal intervals inside.

4. The food weighing device for food testing according to claim 3, characterized in that: A lifting seat is provided at the bottom of the roller conveyor on one side of the alignment box, and a second cylinder is provided inside the lifting seat.

5. The food weighing device for food testing according to claim 4, characterized in that: The output end of the second cylinder is equipped with a second push arm, and the second push arm is connected to the electronic scale.

6. The food weighing device for food testing according to claim 5, characterized in that: Both sides of the second cylinder have sleeves inside the lifting seats, and each sleeve has a sliding rod inside it, which is connected to the electronic scale.

7. The food weighing device for food testing according to claim 6, characterized in that: The roller conveyor is provided with a placement plate at its top, a first cylinder is provided on the side wall of the placement plate, and a tray is provided on the surface of the roller conveyor.

8. The food weighing device for food testing according to claim 7, characterized in that: The first cylinder has a first push arm installed at its output end, and a push plate is provided at the end of the first push arm that is away from the first cylinder.

9. The food weighing device for food testing according to claim 8, characterized in that: Limiting rods are provided on the side walls of the push plates on both sides of the first push arm, and the limiting rods are slidably connected to the placement plate.

10. The food weighing device for food testing according to claim 9, characterized in that: The roller conveyor is provided with a discharge slope on its side wall. A PLC controller is provided on the side wall of the roller conveyor on one side of the discharge slope. The output terminal of the PLC controller is electrically connected to the input terminal of the electronic scale, electric roller, first cylinder, second cylinder, and servo motor.

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