Food conveying and weighing device and weighing method based on photoelectric reflection sticker

Abstract

The application relates to the technical field of food conveying production lines, and discloses a food conveying and weighing device and a weighing method based on photoelectric reflection pasting. The guiding and shunting of the guiding and shunting unit of the separating conveying mechanism can input materials into each separated input channel one by one, the conveying frequency of the input materials from the input bus is monitored, the guiding and shunting range of the guiding and shunting unit is adjusted, only one material can be located in the weighing mechanism within the same time period, the input interference of other materials during the process that the weighing mechanism weighs the material while continuously conveying the material is effectively avoided, the number of the weighing mechanisms can be adjusted, the weighing error of subsequent materials caused by the entry of the subsequent materials during the stable process after the weighing mechanism outputs the material is avoided, and the weighing accuracy of the material is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of food transportation production lines, in particular to a food transportation weighing device and a weighing method based on a photoelectric reflective sticker. Background Art

[0002] Food conveyor weighing equipment is a key component of modern food processing and packaging. It's primarily used for dynamic weighing of food on the production line to ensure that each portion meets standard weight requirements. This type of equipment is typically used in conjunction with conveyor belts, sorting mechanisms, and packaging machines, and is widely used in the automated production of meat, fruits and vegetables, snacks, frozen foods, and other products. With the advancement of industrial automation, dynamic weighing technology has matured. Through the coordinated operation of sensors, control systems, and mechanical structures, it achieves high-speed, high-precision online weighing.

[0003] One of the core challenges of dynamic weighing is ensuring accurate weighing data during the continuous conveyance of food. Traditional weighing methods are susceptible to interference, as food may vibrate, slide, or accumulate as it moves on the conveyor belt. This is especially true on high-throughput production lines, where food items are closely spaced. If conveying speed or timing is improperly controlled, a subsequent food item may enter the weighing area before the previous one has finished weighing, resulting in overlapping weighing signals and ultimately affecting the accuracy of the measurement results. This phenomenon is particularly pronounced with small, lightweight foods (such as potato chips and candies), as their movement is more uncontrollable and more prone to deviation or overlap during conveyance.

[0004] Existing technologies often use mechanical isolation (such as adding baffles or tripping mechanisms) or reducing conveyor speeds to reduce intrusion, but this comes at the expense of production efficiency. Improving weighing accuracy without sacrificing production efficiency remains a pressing need for breakthroughs in food conveyor weighing technology. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a food conveying weighing device and a weighing method based on a photoelectric reflective sticker.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A food conveying and weighing device comprises, in order of material conveying direction, an input bus, a separating conveying mechanism, a plurality of weighing mechanisms, a plurality of reversing conveying mechanisms, an upper output line, and a lower output line. The separating conveying mechanism comprises a guiding and diverting unit and a plurality of separating input channels. The head end of each weighing mechanism is connected to the tail end of a separating input channel via a connecting conveyor belt, and the tail end of each weighing mechanism is connected to the head end of a reversing conveying mechanism. The guiding and diverting unit is capable of receiving material input from the input bus and adjusting the number of enabled separating input channels according to the material conveying frequency. During the same time period, only one material is located within the weighing mechanism, and the weighing mechanism is capable of weighing the material while continuing to convey it. During the same time period, only one material is located within the reversing conveying mechanism, and the reversing conveying mechanism is capable of adjusting the direction of the tail end of the reversing conveying mechanism according to the weighing result of the material by the weighing mechanism at the front end, so as to convey qualified material to the upper output line and unqualified material to the lower output line.

[0008] Preferably, the weighing mechanism includes a mounting frame, a weighing frame and a weighing conveyor belt, a weighing metering unit is provided on one side of the mounting frame, the weighing frame is provided inside the mounting frame, and the weighing conveyor belt is provided at the top of the weighing frame; a shielding cover is provided inside the mounting frame and above the weighing conveyor belt, and photoelectric fences are provided inside the mounting frame and at both ends of the weighing conveyor belt, respectively, and the two photoelectric fences detect the time when the material enters and outputs the weighing conveyor belt respectively.

[0009] Preferably, the weighing frame includes a weighing fixed frame and a weighing movable frame, the weighing fixed frame is fixed to the mounting frame, and the weighing conveyor belt is fixed to the top of the weighing movable frame; the weighing fixed frame and the weighing movable frame are movably connected through a number of evenly distributed weighing sensors, each of the weighing sensors can jointly support the weighing movable frame, and each of the weighing sensors can jointly weigh the weight of the material transported along the weighing conveyor belt.

[0010] Preferably, a photoelectric weighing unit is further provided inside the mounting frame and between the weighing conveyor belt and the shielding cover. The photoelectric weighing unit includes a movable laser and a fixed receiver. The movable laser is fixed between the weighing conveyor belt, and the fixed receiver is fixed inside the mounting frame. The movable laser can emit laser to the fixed receiver. When the material passes through the weighing conveyor belt, the movable laser is displaced along with the weighing conveyor belt, and the fixed receiver can obtain the weight data of the material according to the changes in the received optical path.

[0011] Preferably, the guiding and shunting unit comprises a guiding support, which is arranged above the input bus, two converging guide plates are symmetrically arranged at one end of the bottom end of the guiding support close to one end of the head end of the input bus, a converging channel gradually narrowing along the material conveying direction is formed between the two converging guide plates, an oscillating arm driving motor is arranged at one end of the bottom end of the guiding support away from the head end of the input bus, a guiding driving oscillating arm is fixedly arranged at the output end of the oscillating arm driving motor, two guide plates are fixedly arranged at the bottom end of one end of the guiding driving oscillating arm away from the oscillating arm driving motor, and a guide channel is formed between the two guide plates.

[0012] Preferably, the two guide plates can move with the oscillation of the guiding driving oscillating arm, and the materials can enter the guide channel one by one along the converging channel during the movement of the two guide plates; the input ends of each of the separated input channels converge at the tail end of the input bus; a counting sensor is arranged at the bottom end of the guiding support and at the tail end of the converging channel, the counting sensor can calculate the conveying frequency of the materials according to the flow of the materials entering the guide channel one by one from the converging channel; the oscillation range of the guiding driving oscillating arm increases once and covers one more separated input channel each time when the conveying frequency of the materials enters one set interval.

[0013] Preferably, the reversing conveying mechanism comprises a reversing conveying frame, a buffer conveying belt is arranged at one end of the inside of the reversing conveying frame close to the weighing mechanism, an upper conveying belt, a lower conveying belt and a reversing adjusting unit are arranged at one end of the inside of the reversing conveying frame away from the weighing mechanism; one end of the upper conveying belt and one end of the lower conveying belt away from the buffer conveying belt are fixed with the reversing conveying frame, and the reversing adjusting unit can simultaneously adjust the height of one end of the upper conveying belt and one end of the lower conveying belt close to the buffer conveying belt.

[0014] Preferably, the reversing adjusting unit comprises an angle adjusting roller shaft, the angle adjusting roller shaft is rotationally connected with the reversing conveying frame, driving adjusting arms and driven adjusting arms are arranged at both ends of the angle adjusting roller shaft, and the driving adjusting arms are rotationally connected with the output shaft of an angle adjusting cylinder; the driven adjusting arms are connected with the upper conveying belt through an upper connecting rod, and the upper conveying belt is connected with the lower conveying belt through a lower connecting rod.

[0015] Preferably, when the driven adjusting arms rotate around the angle adjusting roller shaft, one end of the upper conveying belt and one end of the lower conveying belt close to the buffer conveying belt are synchronously moved up and down through the upper connecting rod and the lower connecting rod; the upper output lines are arranged at one end of each of the upper conveying belts away from the buffer conveying belt, and the lower output lines are arranged at one end of each of the lower conveying belts away from the buffer conveying belt.

[0016] A weighing method based on photoelectric reflection stickers, using the food conveying and weighing device to weigh food, comprising the following steps:

[0017] The material to be weighed and measured is collected from the front end of the production line into the input bus, and the separation conveying mechanism guides and separates the material conveyed on the input bus to independently input the material into each separate input channel;

[0018] The material enters the corresponding weighing mechanism along the separate input channel, and only one material is located inside the weighing mechanism at the same time;

[0019] Inside the weighing mechanism, the number of materials inside the weighing mechanism is detected by the reflection of the photoelectric reflection stickers in cooperation with the photoelectric sensor, and when there is only one material, the material is weighed;

[0020] The weighed material enters the reversing conveying mechanism along the weighing mechanism, and the reversing conveying mechanism adjusts the tail end of the reversing conveying mechanism according to the weighing result of the front end of the weighing mechanism, and transports the qualified material to the upper layer output line and the unqualified material to the lower layer output line.

[0021] Compared with the prior art, the present application provides a food conveying and weighing device and a weighing method based on photoelectric reflection stickers, which has the following beneficial effects:

[0022] 1、The food conveying and weighing device can input the material into each separate input channel one by one through the guide and separation of the guide separation unit of the separation conveying mechanism, and can effectively ensure that only one material is located inside the weighing mechanism at the same time by monitoring the conveying frequency of the input material from the input bus and adjusting the guide and separation range of the guide separation unit, effectively avoiding the input interference of other materials during the process of weighing the material while the weighing mechanism continues to convey the material; also, by adjusting the number of weighing mechanisms, the weighing error of the subsequent material caused by the entry of the subsequent material during the stable process after the material is output by the weighing mechanism can be avoided, and the accuracy of the weighing of the material can be ensured.

[0023] 2. This type of food conveying and weighing equipment supports the weighing movable frame through various weighing sensors, and each weighing sensor jointly weighs the weight of the material conveyed along the weighing conveyor belt. By setting a photoelectric weighing unit, when the material passes through the weighing conveyor belt, the movable laser is displaced along the weighing conveyor belt, and the fixed receiver can obtain the weight data of the material according to the change of the received optical path. Therefore, when in use, one weight data of the material can be output through each weighing sensor, and another weight data of the material can be output through the photoelectric weighing unit. The weighing metering unit compares the two weight data, jointly verifies the weighing result of the material, and accurately weighs the material passing through the weighing mechanism.

[0024] 3. This type of food conveying and weighing equipment, driven by a swing arm drive motor, guides the driving swing arm to drive the two guide plates to move synchronously, adjusts the direction of the diversion channel away from one end of the confluence channel, so as to be able to distribute the separated input channels for the materials to enter. When in use, the conveying frequency of the materials entering the diversion channel through the confluence channel is measured by setting a counting sensor, and then the swing range of the two guide plates carried by the guiding driving swing arm is dynamically adjusted according to the conveying frequency of the materials, thereby effectively ensuring the weighing effect of the weighing mechanism located at the rear end of each separated input channel.

[0025] 4. In this type of food conveying and weighing equipment, the weighed material output from the weighing mechanism can first enter the buffer conveyor belt, and through the reversing adjustment unit according to the weighing result of the material output by the weighing metering unit, the output shaft of the angle adjustment cylinder is extended and retracted, and the adjustment arm is driven to drive the angle adjustment roller to rotate, and the driven adjustment arm is driven to rotate, and then the upper connecting rod set at the other end of the driven adjustment arm carries the lower connecting rod to move up and down, and then drives the upper conveyor belt and the lower conveyor belt close to the end of the buffer conveyor belt to move up and down synchronously, thereby adjusting the conveyor belt connected to the buffer conveyor belt and adjusting the final direction of the material output from the buffer conveyor belt. Through the setting of the buffer conveyor belt, the speed of the buffer conveyor belt can be adjusted to cooperate with the adjustment time of the reversing adjustment unit, and effectively output the materials according to whether they are qualified, so that the corresponding materials can be obtained at the tail ends of the upper output line and the lower output line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the three-dimensional structural schematic diagrams of the weighing rear end of a food conveying and weighing device of the present invention;

[0027] Figure 2 This is a second schematic diagram of the three-dimensional structure of the weighing rear end of a food conveying and weighing device of the present invention;

[0028] Figure 3This is a schematic diagram of the three-dimensional structure of a weighing mechanism and a reversing conveying mechanism of a food conveying and weighing device of the present invention;

[0029] Figure 4 This is one of the three-dimensional structural schematic diagrams of a weighing mechanism of a food conveying and weighing device of the present invention;

[0030] Figure 5 This is a second schematic diagram of the three-dimensional structure of a weighing mechanism of a food conveying and weighing device according to the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of a weighing front end and various connecting conveyor belts of a food conveying and weighing device of the present invention;

[0032] Figure 7 This is one of the three-dimensional structural schematic diagrams of the weighing front end of a food conveying and weighing device of the present invention;

[0033] Figure 8 This is a second schematic diagram of the three-dimensional structure of the weighing front end of a food conveying and weighing device according to the present invention;

[0034] Figure 9 This is one of the three-dimensional structural schematic diagrams of a reversing conveying mechanism of a food conveying and weighing device of the present invention;

[0035] Figure 10 This is the second schematic diagram of the three-dimensional structure of the reversing conveying mechanism of the food conveying and weighing equipment of the present invention.

[0036] Figure: 1. Input bus; 2. Separation conveying mechanism; 21. Guide and diversion unit; 211. Guide bracket; 212. Converging guide plate; 213. Swing arm drive motor; 214. Guide drive swing arm; 215. Guide plate; 22. Separation input channel; 3. Weighing mechanism; 31. Mounting frame; 311. Photoelectric barrier; 32. Weighing frame; 321. Weighing fixed frame; 322. Weighing movable frame; 323. Weighing sensor; 33. Weighing conveyor belt; 34. Weighing metering unit; 35. Shielding cover; 36. Photoelectric weighing unit; 361. Active laser; 362. Fixed receiver; 4. Reversing conveying mechanism; 41. Reversing conveying frame; 42. Buffer conveyor belt; 43. Upper conveyor belt; 44. Lower conveyor belt; 45. Reversing adjustment unit; 451. Angle adjustment roller; 452. Driving adjustment arm; 453. Driven adjustment arm; 454. Angle adjustment cylinder; 455. Upper connecting rod; 456. Lower connecting rod; 5. Upper output line; 6. Lower output line. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] As introduced in the background technology, in order to solve the deficiencies in the existing technology and the above technical problems, this application proposes a food conveying weighing device and a weighing method based on photoelectric reflective stickers.

[0039] Example 1: Please refer to Figures 1-10 A food conveying and weighing device comprises, in order of material conveying direction, an input bus 1, a separation conveying mechanism 2, a plurality of weighing mechanisms 3, a plurality of reversing conveying mechanisms 4, an upper output line 5 and a lower output line 6. The separation conveying mechanism 2 comprises a guide diversion unit 21 and a plurality of separation input channels 22. The head end of each weighing mechanism 3 is connected to the tail end of a separation input channel 22 through a connecting conveyor belt, and the tail end of each weighing mechanism 3 is connected to the head end of a reversing conveying mechanism 4; the guide diversion unit 21 can receive the material from the input bus 1. The material is input, and the number of the enabled separated input channels 22 is adjusted according to the material conveying frequency; in the same time period, there is only one material located inside the weighing mechanism 3, and the weighing mechanism 3 can weigh the material while continuing to convey the material; in the same time period, there is only one material located inside the reversing conveying mechanism 4, and the reversing conveying mechanism 4 can adjust the tail end direction of the reversing conveying mechanism 4 according to the weighing result of the material by the weighing mechanism 3 at the front end, and convey the qualified material to the upper output line 5 and the unqualified material to the lower output line 6.

[0040] When in use, this type of food conveying and weighing equipment can weigh packaged or semi-packaged (semi-packaged with isolated food such as cup holders) food. When in use, this type of equipment can be set at the end of multiple front-end production lines, or independently set at the end of a front-end production line (wherein the weighing front end of this type of food conveying and weighing equipment includes an input bus 1 and a partitioning conveying mechanism 2, and the weighing back end includes a plurality of weighing mechanisms 3, a plurality of reversing conveying mechanisms 4, an upper output line 5 and a lower output line 6). Food materials to be weighed and whose accurate specifications are determined enter the front end of the input bus 1 from each front-end production line and are gathered. Under the guidance and diversion of the guide and diversion unit 21 of the partitioning conveying mechanism 2, materials can be input one by one into each partitioned input channel 22. In specific use, by monitoring the conveying frequency of the materials input from the input bus 1 (the amount of materials input in the same time period), the guide and diversion range of the guide and diversion unit 21 is adjusted. When the conveying frequency of the materials is higher, the partitioning is activated. The more input channels 22 there are, the more weighing mechanisms 3 there are that are put into use to weigh the materials at the same time, and it can be effectively ensured that in the same time period, there is only one material inside the weighing mechanism 3, effectively avoiding the input interference of other materials in the process of the weighing mechanism 3 weighing the materials while continuing to transport the materials; it can also be possible to adjust the number of weighing mechanisms 3 to avoid the weighing error of subsequent materials caused by the entry of subsequent materials in the stable process after the weighing mechanism 3 outputs the materials, thereby ensuring the accuracy of the weighing of the materials; and through the setting of the reversing conveying mechanism 4, the reversing conveying mechanism 4 can adjust the tail end direction of the reversing conveying mechanism 4 according to the weighing result of the material by the front-end weighing mechanism 3, and convey qualified materials to the upper output line 5 and unqualified materials to the lower output line 6, and can stably divert and output the weighed materials, avoiding unqualified materials from mixing with qualified materials, and affecting the stability of the food quality after output.

[0041] Example 2: Please refer to Figure 1-Figure 5 The difference from the above embodiment is that the weighing mechanism 3 includes a mounting frame 31, a weighing frame 32 and a weighing conveyor belt 33, a weighing metering unit 34 is provided on one side of the mounting frame 31, the weighing frame 32 is provided inside the mounting frame 31, and the weighing conveyor belt 33 is provided at the top of the weighing frame 32; a shielding cover 35 is provided inside the mounting frame 31 and above the weighing conveyor belt 33, and photoelectric barriers 311 are provided inside the mounting frame 31 and at both ends of the weighing conveyor belt 33, respectively. The two photoelectric barriers 311 respectively detect the time when the material enters and exits the weighing conveyor belt 33.

[0042] The weighing frame 32 comprises a weighing fixed frame 321 fixed between the mounting frame 31 and a weighing movable frame 322, and the weighing conveyor belt 33 is fixed at the top end of the weighing movable frame 322; the weighing fixed frame 321 and the weighing movable frame 322 are movably connected through a plurality of evenly distributed weighing sensors 323, each weighing sensor 323 can jointly support the weighing movable frame 322, and each weighing sensor 323 can jointly weigh the weight of the material conveyed along the weighing conveyor belt 33.

[0043] The inside of the mounting frame 31 and between the weighing conveyor belt 33 and the shielding cover 35 is further provided with a photoelectric weighing unit 36, the photoelectric weighing unit 36 comprises a movable laser 361 and a fixed receiver 362, the movable laser 361 is fixed between the weighing conveyor belt 33 and the fixed receiver 362 is fixed inside the mounting frame 31, the movable laser 361 can emit laser to the fixed receiver 362; when the material passes through the weighing conveyor belt 33, the movable laser 361 is displaced with the weighing conveyor belt 33, at the same time, the fixed receiver 362 can obtain the weight data of the material according to the change of the received light path.

[0044] In specific use, the photoelectric fence 311 can be a combination structure composed of one transmitter and one receiver, or a combination structure composed of one photoelectric reflective sticker and one transmitter-receiver combination. Both structures use the presence or absence of shielding in the light path to determine whether the material passes through the photoelectric fence 311. The weighing sensor 323 is a pressure sensor. The photoelectric weighing unit 36 comprises a movable laser 361 and a fixed receiver 362. The movable laser 361 emits laser to the fixed receiver 362 (the position between the movable laser 361 and the fixed receiver 362 is set to ensure that the light path between the movable laser 361 and the fixed receiver 362 is not shielded). When the material passes through the weighing conveyor belt 33, the movable laser 361 is displaced with the weighing conveyor belt 33, at the same time, the fixed receiver 362 can obtain the weight data of the material according to the change of the received light path. The weight data is calibrated in advance. According to the change of the light path, a plurality of weight values corresponding to the light path are calibrated, so as to obtain accurate weight data.

[0045] During specific use, the shielding cover 35 is used to shield the space above the weighing conveyor belt 33 to prevent the external environment from interfering with the weighing process of the material passing on the weighing conveyor belt 33. The photoelectric barriers 311 are respectively set at both ends of the weighing conveyor belt 33. The two photoelectric barriers 311 respectively detect the time when the material enters and exits the weighing conveyor belt 33, thereby starting the weighing counting in the process of the material entering and exiting the weighing conveyor belt 33. When the material does not enter the weighing conveyor belt 33, each weighing sensor 323 and the photoelectric weighing unit 36 ​​are checked to ensure the accuracy of material weighing. The weighing movable frame 322 is supported by each weighing sensor 323, and each weighing sensor 323 jointly weighs the weight of the material transported along the weighing conveyor belt 33 (the total weight is obtained by subtracting the static weighing input). The weight of the weighing conveyor belt 33 can be obtained by setting the photoelectric weighing unit 36. When the material passes through the weighing conveyor belt 33, the movable laser 361 is displaced along with the weighing conveyor belt 33, and the fixed receiver 362 can obtain the weight data of the material according to the change of the received optical path. Therefore, when in use, one weight data of the material can be output through each weighing sensor 323, and another weight data of the material can be output through the photoelectric weighing unit 36. The weighing metering unit 34 compares the two weight data and jointly verifies the weighing result of the material. When both weight data do not exceed the set qualified range, the material can be judged as qualified, otherwise it is unqualified. The material passing through the weighing mechanism 3 is accurately weighed to prevent unqualified material from being mixed into qualified material, which will affect the stability of the food quality after output.

[0046] Example 3: Please refer to Figure 6-Figure 8 , the difference from the above embodiment is that the guiding and diverting unit 21 includes a guiding bracket 211, which is mounted above the input bus 1, and two converging guide plates 212 are symmetrically provided at one end of the bottom end of the guiding bracket 211 close to the head end of the input bus 1, and a converging channel that gradually shrinks along the material conveying direction is formed between the two converging guide plates 212; a swing arm driving motor 213 is provided at one end of the bottom end of the guiding bracket 211 away from the head end of the input bus 1, and a guiding driving swing arm 214 is fixedly provided at the output end of the swing arm driving motor 213, and two guide plates 215 are fixedly provided at the bottom end of the guiding driving swing arm 214 away from the swing arm driving motor 213, and a guiding channel is formed between the two guide plates 215.

[0047] The two guide plates 215 can move with the swing of the guide drive swing arm 214, and during the movement of the two guide plates 215, the materials can enter the guide channel one by one along the convergence channel; the input ends of each separation input channel 22 converge at the tail end of the input bus 1; a counting sensor is provided at the bottom end of the guide bracket 211 and at the tail end of the convergence channel, and the counting sensor can calculate the material conveying frequency according to the flow rate of the material entering the guide channel one by one from the convergence channel; every time the material conveying frequency enters a set interval, the swing range of the guide drive swing arm 214 increases once and covers one more separation input channel 22.

[0048] During specific use, the cross-section of the confluence channel between the two guide brackets 211 is gradually reduced to cooperate with the conveying effect of the input bus 1, so that the scattered materials can be gradually gathered inside the confluence channel, and the height setting of the guide bracket 211 can be used to intercept the overlapping materials to convey the materials to the confluence channel in a flat state, and the swing arm drive motor 213 is driven to guide the drive swing arm 214 to drive the two guide plates 215 to move synchronously, and adjust the direction of the guide channel away from one end of the confluence channel to be able to distribute the separated input channel 22 into which the materials enter. When in use, the counting sensor (the counting sensor is a common technical solution in the prior art, which can be a grating counter, etc.) is set to count the materials passing through the confluence channel. The material conveying frequency of the flow channel entering the guide channel is measured, and then the swing range of the two guide plates 215 is dynamically adjusted to guide the driving swing arm 214 according to the conveying frequency of the material, which can effectively ensure the weighing effect of the weighing mechanism 3 located at the rear end of each separated input channel 22 (ensuring that in the same time period, there is only one material located inside the weighing mechanism 3, effectively avoiding the input interference of other materials in the process of weighing the material while the weighing mechanism 3 continues to convey the material), while reducing the number of weighing mechanisms 3 put into use, ensuring the weighing efficiency of each weighing mechanism 3 (reducing the working section of the production line and reducing the energy required for staff to monitor the production process), and effectively improving the overall weighing effect of each weighing mechanism 3.

[0049] Example 4: Please refer to Figure 1-Figure 5 , Figure 9-10 The difference from the above embodiment is that the reversing conveying mechanism 4 includes a reversing conveying frame 41, a buffer conveyor belt 42 is provided at one end of the reversing conveying frame 41 close to the weighing mechanism 3, and an upper conveyor belt 43, a lower conveyor belt 44 and a reversing adjustment unit 45 are provided at one end of the reversing conveying frame 41 away from the weighing mechanism 3; the ends of the upper conveyor belt 43 and the lower conveyor belt 44 away from the buffer conveyor belt 42 are fixed to the reversing conveying frame 41, and the reversing adjustment unit 45 can simultaneously adjust the height of the upper conveyor belt 43 and the lower conveyor belt 44 close to the buffer conveyor belt 42.

[0050] The reversing adjustment unit 45 includes an angle adjustment roller 451, which is rotatably connected to the reversing conveying frame 41. A driving adjustment arm 452 and a driven adjustment arm 453 are provided at both ends of the angle adjustment roller 451. The driving adjustment arm 452 is rotatably connected to the output shaft of the angle adjustment cylinder 454; the driven adjustment arm 453 is connected to the upper conveyor belt 43 through an upper connecting rod 455, and the upper conveyor belt 43 and the lower conveyor belt 44 are connected through a lower connecting rod 456.

[0051] When the driven adjustment arm 453 rotates around the angle adjustment roller 451, the upper conveyor belt 43 and the lower conveyor belt 44 are driven to move up and down synchronously at one end close to the buffer conveyor belt 42 through the upper connecting rod 455 and the lower connecting rod 456; the upper output line 5 is set at the end of each upper conveyor belt 43 away from the buffer conveyor belt 42, and the lower output line 6 is set at the end of each lower conveyor belt 44 away from the buffer conveyor belt 42.

[0052] During specific use, the weighed material output from the weighing mechanism 3 can first enter the buffer conveyor belt 42, and the reversing adjustment unit 45 can adjust the weight of the material output from the weighing metering unit 34 through the extension and contraction of the output shaft of the angle adjustment cylinder 454, so that the driving adjustment arm 452 drives the angle adjustment roller 451 to rotate, and drives the driven adjustment arm 453 to rotate, thereby carrying the upper connecting rod 455 set at the other end of the driven adjustment arm 453 and the lower connecting rod 456 to move up and down, thereby driving the upper conveyor belt 43 and the lower conveyor belt 44 close to the end of the buffer conveyor belt 42 to move up and down synchronously, thereby adjusting the conveyor belt connected to the buffer conveyor belt 42, and adjusting the final direction of the material output from the buffer conveyor belt 42. Through the setting of the buffer conveyor belt 42, the speed of the buffer conveyor belt 42 can be adjusted to cooperate with the adjustment time of the reversing adjustment unit 45, and effectively output the materials according to whether they are qualified, so that the corresponding materials can be obtained at the tail ends of the upper output line 5 and the lower output line 6.

[0053] Example 5: A weighing method based on a photoelectric reflective sticker, using a food conveying and weighing device as described in any one of Examples 1 to 4 to weigh food, comprising the following steps:

[0054] The materials to be weighed are collected from the front-end production line and enter the input bus 1. The separation conveying mechanism 2 separates and guides the materials conveyed on the input bus 1 and independently inputs the materials into each separation input channel 22.

[0055] The material enters the corresponding weighing mechanism 3 along the separated input channel 22. In the same time period, there is only one material inside the weighing mechanism 3.

[0056] Inside the weighing mechanism 3, the light reflected by the photoelectric reflective sticker is combined with the photoelectric sensor to detect the amount of material inside the weighing mechanism 3. When there is only one material, the material is weighed;

[0057] The weighed materials are input into the reversing conveying mechanism 4 along the weighing mechanism 3. The reversing conveying mechanism 4 adjusts the tail end direction of the reversing conveying mechanism 4 according to the weighing result of the materials by the weighing mechanism 3 at the front end, and conveys the qualified materials to the upper output line 5 and the unqualified materials to the lower output line 6.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A food conveying and weighing device, comprising, in order of material conveying direction, an input bus, a separation conveying mechanism, a plurality of weighing mechanisms, a plurality of reversing conveying mechanisms, an upper output line, and a lower output line, characterized in that: The separation conveying mechanism includes a guiding and diverting unit and a plurality of separation input channels. The head end of each weighing mechanism is connected to the tail end of one of the separation input channels via a connecting conveyor belt, and the tail end of each weighing mechanism is connected to the head end of one of the reversing conveying mechanisms. The guiding and diverting unit is capable of receiving materials input from the input bus and adjusting the number of the enabled separated input channels according to the conveying frequency of the materials; In the same time period, there is only one material inside the weighing mechanism, and the weighing mechanism can weigh the material while continuing to transport it; In the same time period, there is only one material located inside the reversing conveying mechanism. The reversing conveying mechanism can adjust the tail end direction of the reversing conveying mechanism according to the weighing result of the material by the weighing mechanism at the front end, and convey qualified materials to the upper output line and convey unqualified materials to the lower output line.

2. The food conveying and weighing device according to claim 1, characterized in that: The weighing mechanism includes a mounting frame, a weighing frame and a weighing conveyor belt, a weighing metering unit is provided on one side of the mounting frame, the weighing frame is provided inside the mounting frame, and the weighing conveyor belt is provided on the top of the weighing frame; A shielding cover is provided inside the installation frame and above the weighing conveyor belt, and photoelectric fences are provided inside the installation frame and at both ends of the weighing conveyor belt. The two photoelectric fences respectively detect the time when the material enters and exits the weighing conveyor belt.

3. The food conveying and weighing device according to claim 2, characterized in that: The weighing frame includes a weighing fixed frame and a weighing movable frame, the weighing fixed frame is fixed to the installation frame, and the weighing conveyor belt is fixed to the top of the weighing movable frame; The fixed weighing frame and the movable weighing frame are movably connected via a number of evenly distributed weighing sensors, each of which can jointly support the movable weighing frame, and each of which can jointly weigh the weight of the material transported along the weighing conveyor belt.

4. The food conveying and weighing equipment according to claim 3, characterized in that: A photoelectric weighing unit is further provided inside the mounting frame and between the weighing conveyor belt and the shielding cover. The photoelectric weighing unit includes a movable laser and a fixed receiver. The movable laser is fixed between the weighing conveyor belt and the fixed receiver is fixed inside the mounting frame. The movable laser is capable of emitting laser light toward the fixed receiver. When the material passes through the weighing conveyor belt, the movable laser is displaced along with the weighing conveyor belt, and the fixed receiver can obtain the weight data of the material according to the received light path change.

5. The food conveying and weighing equipment according to claim 1, characterized in that: The guiding and diverting unit includes a guiding bracket, which is mounted above the input bus. Two converging guide plates are symmetrically arranged at one end of the bottom end of the guiding bracket close to the head end of the input bus. A converging channel is formed between the two converging guide plates, which gradually narrows along the material conveying direction. A swing arm drive motor is provided at the end of the bottom of the guide bracket away from the head end of the input bus, and a guide drive swing arm is fixedly provided at the output end of the swing arm drive motor. Two guide plates are fixedly provided at the bottom end of the guide drive swing arm away from the swing arm drive motor, and a guide channel is formed between the two guide plates.

6. The food conveying and weighing equipment according to claim 5, characterized in that: The two guide plates can move along with the swing of the guide drive swing arm, and during the movement of the two guide plates, the materials can enter the guide channel one by one along the converging channel; The input ends of the separate input channels are gathered at the tail end of the input bus; A counting sensor is provided at the bottom end of the guide bracket and at the tail end of the confluence channel. The counting sensor can calculate the conveying frequency of the material according to the flow rate of the material entering the diversion channel one by one from the confluence channel; Every time the material conveying frequency enters a set interval, the swing range of the guide drive swing arm increases once and covers one more separation input channel.

7. The food conveying and weighing equipment according to claim 1, characterized in that: The reversing conveying mechanism includes a reversing conveying frame, a buffer conveyor belt is provided at one end of the reversing conveying frame close to the weighing mechanism, and an upper conveyor belt, a lower conveyor belt and a reversing adjustment unit are provided at one end of the reversing conveying frame away from the weighing mechanism. The ends of the upper conveyor belt and the lower conveyor belt away from the buffer conveyor belt are fixed to the reversing conveying frame, and the reversing adjustment unit can simultaneously adjust the heights of the ends of the upper conveyor belt and the lower conveyor belt close to the buffer conveyor belt.

8. The food conveying and weighing device according to claim 7, characterized in that: The reversing adjustment unit includes an angle adjustment roller shaft, which is rotatably connected to the reversing conveying frame. Both ends of the angle adjustment roller shaft are provided with a driving adjustment arm and a driven adjustment arm, and the driving adjustment arm is rotatably connected to the output shaft of the angle adjustment cylinder. The driven adjustment arm is connected to the upper conveyor belt via an upper connecting rod, and the upper conveyor belt is connected to the lower conveyor belt via a lower connecting rod.

9. The food conveying and weighing device according to claim 8, characterized in that: When the driven adjustment arm rotates around the angle adjustment roller shaft, the upper conveyor belt and the lower conveyor belt are driven to move up and down synchronously at one end close to the buffer conveyor belt through the upper connecting rod and the lower connecting rod; The upper layer output line is arranged at one end of each upper layer conveyor belt away from the buffer conveyor belt, and the lower layer output line is arranged at one end of each lower layer conveyor belt away from the buffer conveyor belt.

10. A weighing method based on photoelectric reflective stickers, characterized in that: The food conveying and weighing device according to any one of claims 1 to 9 is used to weigh food, comprising the following steps: The materials to be weighed are collected from the front-end production line and fed into the input bus. The separation conveying mechanism separates and guides the materials transported on the input bus and independently feeds the materials into each separation input channel. The material enters the corresponding weighing mechanism along the separated input channel. In the same time period, there is only one material inside the weighing mechanism. Inside the weighing mechanism, the light reflected by the photoelectric reflective sticker is used in conjunction with the photoelectric sensor to detect the amount of material inside the weighing mechanism. When there is only one material, the material is weighed. The weighed materials are input into the reversing conveying mechanism along the weighing mechanism. The reversing conveying mechanism adjusts the direction of the tail end of the reversing conveying mechanism according to the weighing result of the material by the weighing mechanism at the front end, and conveys the qualified materials to the upper output line and the unqualified materials to the lower output line.

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