Combination weigher, quantitative weighing system containing the combination weigher, and operation method of the system

Abstract

The present invention provides a combination weighing system and a method for operating the system, including a combination weighing system. The combination weighing system includes a controller and a feed hopper. The feed hopper corresponds to multiple feed hoppers, each feed hopper corresponds to a metering hopper, and the multiple metering hoppers are divided into two or more areas, each area corresponds to a collection hopper. The upper portion of each collection hopper corresponds to two or more metering hoppers and corresponding feed hoppers, and the lower portion of each collection hopper corresponds to a discharge port. The controller controls the operation of the feed hopper, the feed hopper, and the metering hopper. The present invention solves the first problem existing in the prior art: how to improve the efficiency of weight replenishment in combination weighing systems; and the second problem: how to accurately and efficiently replenish the weight of materials in a material cup.

Description

Technical Field

[0001] The present invention relates to the field of weighing technology, and in particular to a combination weigher, a quantitative weighing system containing the combination weigher, and an operating method of the system. Background Art

[0002] At present, the existing combination weighers have low working efficiency for material re-weighing and require manual waste discharge of unqualified materials, which makes the processing efficiency even lower. Therefore, how to improve the working efficiency of the combination weighers for re-weighing has become a problem that needs to be solved.

[0003] Furthermore, many food packaging applications require mixed materials. For example, the packaging of nuts requires both the quantity of pellets and the total weight of the finished product. Food manufacturers typically use only pellet counting equipment, then manually check the weight and make up the difference. This process is not only time-consuming and labor-intensive, but also prevents accurate and effective control of the finished product weight.

[0004] Therefore, how to accurately and efficiently refill the material in the cup becomes a problem that needs to be solved. Summary of the Invention

[0005] The object of the present invention is to provide a combination weighing machine and a quantitative weighing system including the combination weighing machine, as well as an operating method of the system, mainly to solve the problem 1 of the above-mentioned prior art: how to improve the working efficiency of the combination weighing machine; and the problem 2: how to accurately and efficiently replenish the material in the material cup. A combination weighing machine and a quantitative weighing system including the combination weighing machine, as well as an operating method of the system are provided.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a combination weigher, characterized in that: the combination weigher includes a controller and a feeding funnel, the feeding funnel corresponds to multiple feeding hoppers, each feeding hopper corresponds to a measuring hopper, the multiple measuring hoppers are divided into two or more areas, each area corresponds to a collecting funnel, the upper part of each collecting funnel corresponds to two or more measuring hoppers and corresponding feeding hoppers, and the lower part of each collecting funnel corresponds to a discharge port; the controller controls the operation of the feeding funnel, the feeding hopper and the measuring hopper.

[0007] Furthermore, the discharge port is divided into a discharge port for qualified materials and a discharge port for unqualified materials;

[0008] A collecting bucket and a collecting bucket driving device are provided between each group of the collecting funnel and the discharge port for discharging the collected materials through the qualified material discharge port or discharging waste through the unqualified material discharge port. The controller controls the operation of the collecting bucket driving device, and the collecting bucket driving device controls the operation of the collecting bucket.

[0009] Furthermore, a chute is provided between each of the metering hoppers and the corresponding collecting funnel; the qualified material discharge port and the unqualified material discharge port are both provided with a chute; a feeding top cone for dispersing the material and a linear feeding track for vibrating the material and making the material fall into the corresponding feeding hopper are also provided between the feeding funnel and the feeding hopper, the feeding funnel corresponds to the feeding top cone, the feeding top cone corresponds to the linear feeding track, and the linear feeding track corresponds to the feeding hopper; the combination weigher is installed on the combination weigher frame.

[0010] A quantitative weighing system includes the above-mentioned combination weigher, characterized in that: the quantitative weighing system also includes a checkweigher, which weighs the material cup containing the material and sends the weighed weight value to the controller of the combination weigher, and the controller of the combination weigher reweights the material cup containing the material based on the difference between the target weight and the weight value weighed by the checkweigher.

[0011] Furthermore, the checkweigher includes an electronic control box and a weighing unit. The weighing unit weighs the material cup and feeds back the weighed weight value to the electronic control box. The electronic control box sends the weighed weight value to the controller of the combination weigher, and the controller of the combination weigher calculates the difference between the target weight and the weight value weighed by the checkweigher.

[0012] Furthermore, the quantitative weighing system includes a conveying mechanism for sending the material cup containing the material to the checkweigher for weighing and then sending it to the combination weigher for reweighting. The conveying mechanism includes a checkweigher conveyor belt and a combination weigher conveyor belt. The checkweigher conveyor belt includes an entrance belt and a weighing section belt corresponding to the weighing unit.

[0013] Furthermore, the checkweigher also includes an instrument for inputting the rated weight and the allowable deviation range value, and the instrument is connected to the electronic control box; a vibration separation device is also provided between the combination scale and the checkweigher for discharging the material cups containing materials that are weighed by the checkweigher and determined to be unqualified based on the rated weight and the allowable deviation range value out of the conveying mechanism, the vibration separation device includes a vibration separation segment belt and an unqualified exclusion lever, and the electronic control box of the checkweigher controls the operation of the unqualified exclusion lever; the checkweigher is installed on the main body frame, and the vibration separation device is installed on the vibration separation device frame.

[0014] Furthermore, there is one feeding funnel and 20 feeding hoppers, corresponding to 20 metering hoppers and 20 chutes; there are two collecting funnels, and corresponding to two groups of collecting hoppers and collecting hopper driving devices, wherein every 10 chutes correspond to one collecting funnel, and each collecting hopper corresponds to a group of two chutes, and the two chutes respectively correspond to a group of qualified material discharge port and unqualified material discharge port.

[0015] A method for operating a quantitative weighing system, which relates to the above-mentioned quantitative weighing system, is characterized in that: the specific steps are as follows

[0016] S1. Set the rated weight and allowable deviation range of the material through the instrument of the checkweigher to form the rated weight range value, and set the target weight of the material through the controller;

[0017] S2. The material cup filled with material enters the entrance belt through the conveying mechanism. The entrance belt sends the material cup filled with material to the weighing section belt. The weighing unit weighs the material cup filled with material and feeds back the weighed weight value to the control box. The control box determines whether the weighed weight value is within the rated weight range.

[0018] If it is not within the rated weight range, when the material cup is conveyed to the vibration separation end belt, the control box controls the vibration separation device to remove the material cup from the conveying mechanism through the unqualified exclusion lever, and the material cup will no longer enter the combination weigher for re-weighing;

[0019] If the control box determines that the weighed weight value is within the rated weight range, the control box will send the weighed weight value to the combination scale controller. At the same time, the conveying mechanism will send the material cup to the qualified material discharge port of the combination scale through the vibrating end belt, waiting for the combination scale to re-weigh it.

[0020] S3. The feeding funnel of the combination weigher discharges the material. After being dispersed by the feeding top cone, the material enters the corresponding feeding hopper through the linear feeding track. The controller controls the feeding hopper to discharge the material into each measuring hopper. Each measuring hopper feeds back the weight of the material inside to the controller, and the controller collects the weight information of the material in each measuring hopper. At the same time, the controller calculates the difference that needs to be reweighed based on the target weight and the weight value fed back by the checkweigher. According to the difference, the controller selects the most appropriate materials from several measuring hoppers for discharge through combined calculation. After the materials in the several measuring hoppers pass through the corresponding chute, collecting funnel and collecting hopper, the corresponding collecting hopper driving device will pass the materials in the collecting hopper through the chute and the qualified material discharge port, and discharge the materials into the material cup waiting for reweighing, completing the reweighing operation of the material cup containing the material.

[0021] Furthermore, the 20 feeding hoppers are arranged in a circle and sorted in sequence, wherein the feeding hoppers numbered 1 to 10 and their corresponding measuring hoppers and chutes correspond to a collecting funnel, a collecting hopper and a collecting hopper driving device, as well as a group of chutes, a qualified material discharge port and an unqualified material discharge port, forming area A; wherein the feeding hoppers numbered 11 to 20 and their corresponding measuring hoppers and chutes correspond to a collecting funnel, a collecting hopper and a collecting hopper driving device, as well as another group of chutes, a qualified material discharge port and an unqualified material discharge port, forming area B; areas A and B are independent of each other, and a combination calculation is performed to select the materials of the most appropriate measuring hoppers, and the weighting operation of the corresponding material cups containing the materials is completed;

[0022] In the above step S3, when the controller cannot select the appropriate materials from several measuring buckets for unloading in a combined calculation manner according to the difference, the materials in all the corresponding measuring buckets are regarded as unqualified reweighting materials. At this time, the controller controls all the materials in the measuring buckets to pass through the corresponding chute, collecting funnel and collecting bucket, and the corresponding collecting bucket driving device discharges the materials in the collecting bucket out of the combination weigher through the chute and the unqualified material discharge outlet, and repeats step S3 until the controller selects the appropriate materials from several measuring buckets for unloading in a combined calculation manner to form qualified reweighting materials, and completes the reweighting operation of the material cup containing the material.

[0023] In view of the above technical features, the present invention has the following beneficial effects:

[0024] 1. By dividing the combination weigher into multiple zones, each zone corresponds to a set of collecting funnels and discharge ports. Each zone can realize independent weight replenishment operation, or multiple zones can realize weight replenishment operation simultaneously, thus greatly improving the working efficiency of weight replenishment of the combination weigher.

[0025] 2. By adding the design of a collecting bucket and a collecting bucket driving device, the combination weigher can be used as a backup unloading hopper. The process of unloading from the collecting bucket to the material cup and the process of unloading from the measuring hopper to the collecting funnel can occur simultaneously, thereby improving the working efficiency of the combination weigher in terms of weight replenishment and unloading. Compared with the working mode in which the two processes occur sequentially, the two processes occur simultaneously, saving a lot of weight replenishment time.

[0026] 3. By adding a collection bucket and a collection bucket drive device, the combination weigher can also control the collection bucket drive device through the controller to remove unqualified materials in the collection bucket, empty the measuring bucket, and carry out a new round of loading and measuring. The controller can then calculate and select several suitable materials for the measuring bucket and reweight the material cup containing the material to ensure that the weight of the material in the cup is more accurate after reweighting, meeting the customer's weight requirements.

[0027] 4. The quantitative weighing system includes a checkweigher and a combination weigher. The checkweigher is in front, which weighs the material cup first and feeds the weight value back to the combination weigher. The combination weigher then accurately replenishes the material in the cup on this basis. The replenishing effect is good and the replenishing efficiency is high. It can accurately and efficiently replenish the material in the cup.

[0028] 5. The quantitative weighing system adds a vibration separation device to remove the cups of unqualified materials in the checkweigher link, further improving the precision and efficiency of the quantitative weighing system's reweighting, and achieving the goal of accurately and efficiently reweighting the materials in the cups. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the combination weigher in Example 1.

[0030] Figure 2 It is a CC sectional view of the combination weigher in Example 1.

[0031] Figure 3 It is a top view of the combination weigher in Example 1, as well as the serial number positions and the A and B partition positions.

[0032] Figure 4 It is a three-dimensional diagram of a quantitative weighing system in Example 2.

[0033] Figure 5 This is a front view of the checkweigher, vibration separation device and conveying mechanism in Example 2.

[0034] Figure 6 It is a top view of the checkweigher, vibration separation device and conveying mechanism in Example 2.

[0035] In the figure: 1 combination weigher; 1-1 feeding funnel; 1-2 feeding cone; 1-3 linear feeding track; 1-4 feeding hopper; 1-5 weighing hopper; 1-6 chute; 1-7 combination weigher frame; 1-8 collecting funnel; 1-9 collecting hopper drive device; 1-10 collecting hopper; 1-11 chute; 1-12 qualified material discharge port; 1-13 unqualified material discharge port;

[0036] 2 Checkweigher; 2-1 Instrument; 2-2 Electric control box; 2-3 Weighing section belt; 2-4 Inlet belt; 2-5 Main frame; 2-6 Weighing unit; 2-7 Vibrating separation device frame; 2-8 Vibrating separation belt; 2-9 Unqualified rejection lever;

[0037] 3. A cup filled with material;

[0038] 4. Other input belts for feeding materials into the checkweigher. DETAILED DESCRIPTION

[0039] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0040] See also Figures 1 to 3This embodiment provides a combination weigher, which includes a controller and a feeding funnel 1-1. The feeding funnel 1-1 corresponds to multiple feeding hoppers 1-4, each feeding hopper 1-4 corresponds to a measuring hopper 1-5, and the multiple measuring hoppers 1-5 are divided into two or more areas, each area corresponds to a collecting funnel 1-8, and the upper part of each collecting funnel 1-8 corresponds to two or more measuring hoppers 1-5 and the corresponding feeding hopper 1-4, and the lower part of each collecting funnel 1-8 corresponds to a discharge port; the controller (not shown in the drawings) controls the operation of the feeding funnel 1-1, the feeding hopper 1-4 and the measuring hopper 1-5.

[0041] The collecting funnel 1-8 is used to collect and aggregate the materials in the measuring hoppers 1-5 within the corresponding range (for example, the collecting funnel 1-8 in area A corresponds to the measuring hoppers 1-5 with serial numbers 1 to 10, and the collecting funnel 1-8 in area B corresponds to the measuring hoppers 1-5 with serial numbers 11 to 20) selected by the controller, so as to facilitate the smooth and rapid entry of the materials into the corresponding collecting hoppers 1-10.

[0042] The discharge port is divided into a qualified material discharge port 1-12 and an unqualified material discharge port 1-13; a collecting bucket 1-10 and a collecting bucket 1-10 driving device 1-9 for discharging the collected materials through the qualified material discharge port 1-12 or discharging waste through the unqualified material discharge port 1-13 are also provided between each group of the collecting funnels 1-8 and the discharge port. The controller controls the operation of the collecting bucket 1-10 driving device 1-9, and the collecting bucket 1-10 driving device 1-9 controls the operation of the collecting bucket 1-10 (for example, controlling the collecting bucket 1-10 to discharge materials corresponding to the qualified material discharge port 1-12 or discharging waste materials through the unqualified material discharge port 1-13, and controlling the opening and closing of the collecting bucket 1-10).

[0043] A chute 1-6 is provided between each of the metering hoppers 1-5 and the corresponding collecting hopper 1-8; a chute 1-11 is provided between the qualified material discharge port 1-12 and the unqualified material discharge port 1-13; a feeding top cone 1-2 for dispersing the material and a linear feeding track 1-3 for vibrating the material and making it fall into the corresponding feeding hopper 1-4 are also provided between the feeding funnel 1-1 and the feeding hopper 1-4. The feeding funnel 1-1 corresponds to the feeding top cone 1-2, and the feeding top cone 1-2 corresponds to the linear feeding track 1-3. The material track 1-3, the linear feeding track 1-3 corresponds to the feeding hopper 1-4; the combination weigher is installed on the combination weigher frame 1-7, that is, the feeding funnel 1-1, the feeding top cone 1-2, the linear feeding track 1-3, the feeding hopper 1-4, the measuring hopper 1-5, the chute 1-6, the collecting funnel 1-8, the collecting hopper 1-10, the driving device 1-9 and the collecting hopper 1-10, the chute 1-11 are all connected or indirectly connected to the frame, and various wires, electrical appliances, etc. connected to the aforementioned components are placed in the frame.

[0044] The feeding hopper 1-4 is also a storage hopper, which temporarily stores materials before the measuring hopper 1-5. It discharges materials into the measuring hopper 1-5 in small amounts as required, so that the measuring hopper 1-5 can weigh the materials therein each time, and the subsequent controller can control several measuring hoppers 1-5 to discharge materials accurately, thereby achieving the effect of accurate weight replenishment of the combination scale.

[0045] The chute 1-6 is used to help the material in the measuring hopper 1-5 to enter the collecting funnel 1-8 quickly and smoothly. The chute 1-11 is used to help the material in the collecting hopper 1-10 to enter the material cup to be refilled quickly and smoothly.

[0046] In this embodiment 1, there is one feeding hopper 1-1 and 20 feeding hoppers 1-4, corresponding to 20 metering hoppers 1-5 and 20 chutes 1-6. There are two collecting hoppers 1-8, and correspondingly, there are two groups of collecting hoppers 1-10 and collecting hopper 1-10 drive devices 1-9. Among them, every 10 chutes 1-6 correspond to one collecting hopper 1-8, and each collecting hopper 1-10 corresponds to a group of two chutes 1-11. The two chutes 1-11 respectively correspond to a group of qualified material discharge ports 1-12 and unqualified material discharge ports 1-13. Of course, the more feeding hoppers 1-4 and corresponding metering hoppers 1-5 there are, the more combination schemes the controller can combine and calculate on the metering hoppers 1-5 to form matching "replenishment values ​​required for replenishment", the higher the success probability of accurate replenishment, and the lower the possibility and / or the fewer times the collecting hopper 1-10 drive devices 1-9 and collecting hoppers 1-10 will discharge unqualified materials.

[0047] The 20 feeding hoppers 1-4 are arranged in a circle and sorted in sequence, wherein the feeding hoppers 1-4 with serial numbers 1 to 10 and their corresponding measuring hoppers 1-5 and chutes 1-6 correspond to a collecting funnel 1-8, a collecting hopper 1-10 and a driving device 1-9 for the collecting hopper 1-10, as well as a group of chutes 1-11, a qualified material discharge port 1-12 and an unqualified material discharge port 1-13, forming area A; wherein the feeding hoppers 1-4 with serial numbers 11 to 20 and their corresponding measuring hoppers 1-5 and chutes 1-6 correspond to a collecting funnel 1-8, a collecting hopper 1-10 and a collecting hopper 1-10 driving device 1-9, as well as a group of chutes 1-11, a qualified material discharge port 1-12 and an unqualified material discharge port 1-13, form area A; -10 drive device 1-9, another set of chutes 1-11, qualified material discharge port 1-12, and unqualified material discharge port 1-13 form Zone B. Zones A and B are independent of each other, performing combined calculations to select the most appropriate materials for several weighing hoppers 1-5, and then completing the reweighting operation for the corresponding material cups. Zones A and B of the combination weigher reweight the two corresponding material cups simultaneously or sequentially without affecting each other. In other words, the feeding, weighing, combining, unloading, and unqualified material discharge operations in Zones A and B are independent and can complete their respective tasks independently. The combination weigher's reweighting operation is more efficient. The number of zones can be increased according to different requirements.

[0048] The controller can also accept the weight value of the material cup containing the material and / or the weight value of the material in the cup (for example, the net weight of the material in the cup can be obtained by subtracting the tare weight from the weight measured by the checkweigher) fed back by other components (such as a checkweigher). The controller can also be used to set a "target weight value" and use the target weight value (including the material cup weight) minus the weight value of the material cup containing the material to obtain the difference, or use the target weight value (excluding the material cup weight) minus the weight value of the material in the cup to obtain the difference, as the "supplementary weight value required".

[0049] Taking area A of the combination weigher as an example, a certain amount of material in the feeding funnel 1-1 falls to the feeding top cone 1-2 (preferably, the feeding funnel 1-1 is located directly above the center of the feeding top cone 1-2, and the feeding top cone 1-2 is in the shape of a cone protruding upward), and the feeding top cone 1-2 disperses the material and relatively evenly enters the linear feeding track 1-3. The linear feeding track 1-3 is provided with a vibrator to help the material in the linear feeding track 1-3 vibrate and make the material fall into the corresponding feeding hopper 1-4 (in fact, the 20 feeding hoppers 1-4 in areas A and B randomly carry the material falling from the corresponding linear feeding track 1-3, and the weight of the material in the feeding hopper 1-4 may be the same or different). At this time, a rough material division operation is performed to roughly control the weight of the material entering the feeding hopper 1-4.

[0050] The controller controls the feed hopper 1-4 to discharge materials into each measuring hopper 1-5, and each measuring hopper 1-5 feeds back the weight of the material therein to the controller, and the controller collects the weight information of the materials in each measuring hopper 1-5; at the same time, the controller calculates the difference that needs to be reweighed based on the target weight and the weight value fed back by the checkweigher, and the controller selects the most appropriate materials from several measuring hoppers 1-5 for discharge according to the difference (i.e., the corresponding "reweighing value that needs to be reweighed") through combined calculation. After the materials in the several measuring hoppers 1-5 pass through the corresponding chute 1-6, collecting funnel 1-8 and collecting hopper 1-10, the corresponding collecting hopper 1-10 driving device 1-9 will drive the materials in the collecting hopper 1-10 through the chute 1-11 and the qualified material discharge port 1-12, and discharge them into the material cup waiting for reweighing, thereby completing the reweighing operation of the material cup containing the material.

[0051] In the above process, the controller obtains the corresponding "replenishing weight value" (the difference between the target weight value and the weight value of the material cup containing the material) according to the weight value of the material cup containing the material corresponding to the qualified material discharge port 1-12 in area A.

[0052] When the controller can calculate the weight of the corresponding measuring buckets 1-5 in area A according to the "weight value required to be replenished" (it can be calculated by combining all the measuring buckets 1-5 in area A at a time, or it can be calculated by combining 1-5 parts of the measuring buckets 1-5 for the first time and 6-10 parts of the measuring buckets 1-5 for the second time in batches), the materials in the most suitable measuring buckets 1-5 meet the requirements (that is, the total weight of the materials in the most suitable measuring buckets 1-5 is equal to the weight required to be replenished). If the weight value is within the weight value required for replenishment or within the allowable deviation range of the weight value required for replenishment, the controller determines that the material is qualified for the collecting bucket 1-10 driving device 1-9 at this time, and the several measuring buckets 1-5 unload the material at the same time, and after entering the corresponding chute 1-6, the material is collected into the collecting bucket 1-10 through the collecting funnel 1-8. Under the control of the controller, the collecting bucket 1-10 driving device 1-9 controls the collecting bucket 1-10 to put the qualified material into the material cup containing the material that needs to be replenished through the chute 1-11, thereby completing the replenishment operation;

[0053] When the controller cannot obtain the materials of several suitable measuring buckets 1-5 that meet the requirements in combination calculation according to the "supplementary weight value to be supplemented" in the corresponding measuring buckets 1-5 in area A (that is, the total weight of the materials in the most suitable measuring buckets 1-5 is greater than or less than the supplementary weight value to be supplemented, or is outside the supplementary weight value to be supplemented and its allowable deviation range), the controller determines that the material is unqualified for the driving device 1-9 of the collecting bucket 1-10 at this time. At this time, the materials in all the measuring buckets 1-5 in area A that are combined and calculated need to be discharged from the combination weigher. Therefore, all the measuring buckets 1-5 that are combined and calculated unload the materials at the same time and enter the corresponding chute 1 -6, the materials are collected by the collecting funnel 1-8 and then collected by the collecting hopper 1-10. Under the control of the controller, the driving device 1-9 of the collecting hopper 1-10 controls the collecting hopper 1-10 to discharge the unqualified materials out of the combination weigher through the chute 1-11 and the unqualified material discharge port. Then, all the feeding hoppers 1-4 and measuring hoppers 1-5 in area A can reload and measure a new batch of materials during the new round of unloading from the feeding funnel 1-1. The controller will perform a combination calculation again based on the "replenishing weight value required" until the materials in the most appropriate several measuring hoppers 1-5 that meet the requirements can be obtained through combination calculation in the corresponding measuring hoppers 1-5 in area A. This ensures that the net weight of the materials in the material cups meets the design requirements for the total weight of the finished product.

[0054] In other words, the "required reweight value" used by the controller to determine whether the material is qualified and control the collection hopper 1-10 drive device 1-9 to operate accordingly is not a fixed value. It is calculated based on the weight of each different material cup and is determined by the weight of each material cup (ultimately, the weight of the material in the cup). This ensures that each material cup can achieve accurate reweighting operation.

[0055] In addition, the design of the collecting bucket 1-10 can also help improve the working efficiency of the combination weigher for re-weighing. Because the material needs to pass through the chute 1-6 and the collecting funnel 1-8 to fall from the measuring bucket 1-5 to the collecting bucket 1-10, which takes time, the collecting bucket 1-10 can be used as a temporary storage space for the re-weighing material. For example, after the first re-weighing material falls into the collecting bucket 1-10, the collecting funnel 1-8 can continue to collect the second re-weighing material.

[0056] The second collection process of the collecting funnel 1-8 and the first unloading process of the collecting hopper 1-10 in the material cup can be carried out simultaneously, and so on. This can save a lot of working time (reduce the time of unloading) and improve the working efficiency of the combination weigher.

[0057] See also Figures 4 to 6 Specific embodiment 2, this embodiment 2 provides a quantitative weighing system, which involves a combination weigher and a checkweigher mentioned in specific embodiment 1. The checkweigher weighs the material cup containing the material and sends the weighed weight value to the controller of the combination weigher. The controller of the combination weigher reweights the material cup containing the material based on the difference between the target weight and the weight value weighed by the checkweigher.

[0058] The checkweigher electronic control box 2-2 and the weighing unit 2-6 are configured such that the weighing unit 2-6 weighs the material cup containing the material and feeds back the weighed weight value to the electronic control box 2-2. The electronic control box 2-2 sends the weighed weight value to the controller of the combination weigher, and the controller of the combination weigher calculates the difference between the target weight and the weight value weighed by the checkweigher.

[0059] The quantitative weighing system includes a conveying mechanism for sending the material cup containing the material to the checkweigher for weighing and then sending it to the combination weigher for reweighting. The conveying mechanism includes a checkweigher conveyor belt and a combination weigher conveyor belt. The checkweigher conveyor belt includes an entrance belt 2-4 and a weighing section belt 2-3 corresponding to the weighing unit 2-6.

[0060] The checkweigher also includes an instrument 2-1 for inputting the rated weight and the allowable deviation range value, and the instrument 2-1 is connected to the electric control box 2-2; a vibration separation device is also provided between the combination scale and the checkweigher for discharging the material cups containing materials that are weighed by the checkweigher and determined to be unqualified according to the rated weight and the allowable deviation range value out of the conveying mechanism, and the vibration separation device includes a vibration separation segment belt 2-8 and an unqualified exclusion lever 2-9, and the electric control box 2-2 of the checkweigher controls the operation of the unqualified exclusion lever 2-9; the checkweigher is installed on the main body frame 2-5, and the vibration separation device is installed on the vibration separation device frame 2-7.

[0061] The instrument 2-1 is used to input the rated weight and the allowable deviation range (at this time, the rated weight and the allowable deviation range are both less than the target weight value, leaving weight space for the combination weigher to make up the weight), and can also be used to display the weight value of the material cup filled with material measured by the weighing unit 2-6; the electronic control box 2-2 is used to control the instrument 2-1 and the weighing unit 2-6, and to feed back the weight value measured by the weighing unit 2-6 to the combination weigher controller, and the electronic control box 2-2 is used to control the operation of the vibration separation device (mainly to control the operation of the unqualified elimination gear lever 2-9 in the vibration separation device); the weighing unit 2-6 is used to weigh the material cup filled with material and feed back the weighed weight value to the electronic control box 2-2.

[0062] Here, "the material cup containing material that is determined to be unqualified after being weighed by the checkweigher" refers to the weight value measured by the checkweigher, which is not within the rated weight range (that is, the rated weight range is formed by the rated weight and the allowable deviation range. For example, if the rated weight is 18g and the allowable deviation range is -1.0g to +2.0g, then the rated weight range is 17g to 20g). If it is higher than the maximum value of the weight range (for example, 20g) or lower than the minimum value of the weight range (for example, 17g), it is considered an unqualified material cup containing material.

[0063] Here, the checkweigher is used to verify whether the weight of the material in the cup is within the rated weight range, rejecting any overweight or underweight material, and ensuring that the final weight of the material in the cup after reweighing on the combination weigher is acceptable. The final weight of the material is determined and guaranteed by the combination weigher.

[0064] A quantitative weighing system is operated as follows:

[0065] S1. Set the rated weight and allowable deviation range of the material through the instrument 2-1 of the checkweigher (for example, if the rated weight of the material is 18g and the allowable deviation range is -1.0g to +2.0g, then the rated weight range is 17g to 20g. You can also set the tare weight of the material cup to 230g according to actual needs) to form the rated weight range (17g to 20g). Set the target weight of the material through the controller of the combination weigher (target weight is 25g or target weight is 25g and the allowable deviation range is -0.5g to +0.5g);

[0066] S2. The material cup filled with material enters the entrance belt 2-4 through the conveying mechanism (for example, other input belt 4 for feeding material to the checkweigher). The entrance belt 2-4 conveys the material cup filled with material to the weighing section belt 2-3. The weighing unit 2-6 weighs the material cup filled with material and feeds the weighed weight value back to the control box. The control box determines whether the weighed weight value is within the rated weight range (17g ~ 20g).

[0067] If the cup is not within the rated weight range (for example, greater than 20g or less than 17g), when the cup is conveyed to the vibration separation belt, the control box controls the vibration separation device to remove the cup from the conveying mechanism through the unqualified rejection lever 2-9 (that is, one end of the unqualified rejection lever 2-9 is fixed and the other end can rotate. The cup that is not within the rated weight range is swept off the vibration separation belt by the rotation of the unqualified rejection lever 2-9 and is subsequently taken away by manual labor or other working mechanisms). The cup will no longer enter the combination weigher for re-weighing.

[0068] If the control box determines that the weighed weight value is within the rated weight range (17g~20g), the control box will send the weighed weight value (for example, the net weight of the material is 19g) to the combination scale controller. At the same time, the conveying mechanism will send the material cup through the vibrating end belt to the qualified material discharge port 1-12 of the combination scale, waiting for the combination scale to reweight it.

[0069] S3. The controller of the combination weigher calculates the corresponding "supplementary weight value" (6g or 6g with an allowable deviation range of -0.5g to +0.5g, i.e., the difference between the target weight and the weighed weight value) according to the target weight of the material (the target weight is 25g or the target weight is 25g and the allowable deviation range is -0.5g to +0.5g) and the weighed weight value (for example, the net weight of the material is 19g). The controller uses the combination calculation method to determine whether it can select several appropriate measuring hoppers 1-5 for material discharge. If it can select several appropriate measuring hoppers 1-5 for material discharge, the controller selects the most appropriate ones. The materials are unloaded (for example, if there are several combinations that meet the conditions, the material weight closest to 6g is selected after the combination. If several combinations meet the conditions and the combined material weights are the same, they are selected in order according to the serial numbers involved in the measuring buckets 1-5). The specific unloading and reweighting steps and processes are detailed in Specific Example 1, which are not repeated here; if it is impossible to select the materials of several suitable measuring buckets 1-5 for unloading, the collecting bucket 1-10 is controlled by the driving device 1-9 of the collecting bucket 1-10 to discharge all the materials in the corresponding measuring bucket 1-5. The specific unloading and reweighting steps and processes are detailed in Specific Example 1, which are not repeated here.

[0070] The controller's combined calculation method, such as "based on the combined compensation principle", means that the combination scale adds weight to the material cup based on the difference between the target weight and the weight value measured by the checkweigher.

[0071] In this patent, the checkweigher not only checks the weight of the preceding process, but also serves as a part of the metering process, namely providing weight data for the combination weigher.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A quantitative weighing system, characterized in that: The quantitative weighing system includes a combination weigher and a checkweigher. The checkweigher is placed before the combination weigher. The checkweigher first weighs the material cup containing the material and sends the weight value to the controller of the combination weigher. The controller of the combination weigher then re-weights the material cup containing the material based on the difference between the target weight and the weight value measured by the checkweigher. The combination weigher includes a controller and a feeding hopper (1-1), the feeding hopper (1-1) corresponds to a plurality of feeding hoppers (1-4), each feeding hopper (1-4) corresponds to a measuring hopper (1-5), the plurality of measuring hoppers (1-5) are divided into two or more areas, each area corresponds to a collecting funnel (1-8), the upper part of each collecting funnel (1-8) corresponds to two or more measuring hoppers (1-5) and the corresponding feeding hopper (1-4), and the lower part of each collecting funnel (1-8) corresponds to a discharge port; the controller controls the operation of the feeding hopper (1-1), the feeding hopper (1-4) and the measuring hopper (1-5); The checkweigher comprises an instrument (2-1) for inputting a rated weight and an allowable deviation range value, the instrument (2-1) being connected to an electric control box (2-2); a vibration separation device is further provided between the combination weigher and the checkweigher for discharging a material cup containing material that is weighed by the checkweigher and determined to be unqualified based on the rated weight and the allowable deviation range value, out of a conveying mechanism; the vibration separation device comprises a vibration separation segment belt (2-8) and an unqualified removal lever (2-9); the electric control box (2-2) of the checkweigher controls the operation of the unqualified removal lever (2-9); the checkweigher is mounted on a main body frame (2-5), and the vibration separation device is mounted on a vibration separation device frame (2-7).

2. A quantitative weighing system according to claim 1, characterized in that: The discharge ports are divided into discharge ports for qualified materials (1-12) and discharge ports for unqualified materials (1-13); A collecting bucket (1-10) and a collecting bucket (1-10) driving device (1-9) are provided between each group of the collecting funnels (1-8) and the discharge port for discharging the collected materials through the qualified material discharge port (1-12) or discharging the collected materials through the unqualified material discharge port (1-13). The controller controls the operation of the collecting bucket (1-10) driving device (1-9), and the collecting bucket (1-10) driving device (1-9) controls the operation of the collecting bucket (1-10).

3. A quantitative weighing system according to claim 2, characterized in that: A chute (1-6) is provided between each of the metering hoppers (1-5) and the corresponding collecting hopper (1-8); a chute (1-11) is provided at the qualified material discharge port (1-12) and the unqualified material discharge port (1-13); a feeding top cone (1-2) for dispersing the material and a linear feeding track (1-3) for vibrating the material and causing it to fall into the corresponding feeding hopper (1-4) are also provided between the feeding hopper (1-1) and the feeding hopper (1-4); the feeding hopper (1-1) corresponds to the feeding top cone (1-2), the feeding top cone (1-2) corresponds to the linear feeding track (1-3), and the linear feeding track (1-3) corresponds to the feeding hopper (1-4); and the combination weigher is mounted on a combination weigher frame (1-7).

4. A quantitative weighing system according to claim 3, characterized in that: The checkweigher includes a weighing unit (2-6), which weighs a material cup containing a material and feeds back the weighed weight value to an electric control box (2-2). The electric control box (2-2) sends the weighed weight value to a controller of a combination weigher, and the controller of the combination weigher calculates the difference between a target weight and a weight value weighed by the checkweigher.

5. A quantitative weighing system according to claim 4, characterized in that: The quantitative weighing system comprises a conveying mechanism for conveying a material cup containing material to a checkweigher for weighing and then conveying it to a combination weigher for re-weighing. The conveying mechanism comprises a checkweigher conveyor belt and a combination weigher conveyor belt. The checkweigher conveyor belt comprises an inlet belt (2-4) and a weighing section belt (2-3) corresponding to a weighing unit (2-6).

6. A quantitative weighing system according to claim 5, characterized in that: There is one feeding funnel (1-1), 20 feeding hoppers (1-4), corresponding to 20 metering hoppers (1-5) and 20 chutes (1-6), two collecting funnels (1-8), and two groups of corresponding collecting hoppers (1-10) and collecting hopper (1-10) driving devices (1-9), wherein every 10 chutes (1-6) correspond to one collecting funnel (1-8), and each collecting hopper (1-10) corresponds to a group of two chutes (1-11), and the two chutes (1-11) respectively correspond to a group of qualified material discharge ports (1-12) and unqualified material discharge ports (1-13).

7. A method for operating a quantitative weighing system, using the quantitative weighing system according to claim 6, characterized in that: The specific steps are as follows S1. Set the rated weight and allowable deviation range of the material through the instrument (2-1) of the checkweigher to form the rated weight range value, and set the target weight of the material through the controller; S2. The material cup filled with material enters the entrance belt (2-4) through the conveying mechanism. After the entrance belt (2-4) sends the material cup filled with material to the weighing section belt (2-3), the weighing unit (2-6) weighs the material cup filled with material and feeds back the weighed weight value to the electric control box (2-2). The electric control box (2-2) determines whether the weighed weight value is within the rated weight range. If the weight is not within the rated weight range, when the material cup is conveyed to the vibration separation end belt, the electric control box (2-2) controls the vibration separation device to remove the material cup from the conveying mechanism through the unqualified elimination lever (2-9), and the material cup will no longer enter the combination weigher for re-weighting. If the electric control box (2-2) determines that the weighed weight value is within the rated weight range, the electric control box (2-2) sends the weighed weight value to the combination weigher controller, and at the same time, the conveying mechanism sends the material cup containing the material to the qualified material discharge port (1-12) of the combination weigher through the vibrating end belt, waiting for the combination weigher to re-weigh it; S3, the feeding funnel (1-1) of the combination weigher discharges the material, and after being dispersed by the feeding top cone (1-2), the material enters the corresponding feeding hopper (1-4) through the linear feeding track (1-3). The controller controls the feeding hopper (1-4) to discharge the material into each measuring hopper (1-5). Each measuring hopper (1-5) feeds back the weight of the material in it to the controller, and the controller collects the weight information of the material in each measuring hopper (1-5); at the same time, the controller calculates the weight that needs to be added based on the target weight and the weight value fed back by the checkweigher. The controller selects the most appropriate materials from several measuring hoppers (1-5) for material discharge according to the difference in combination calculation. After the materials in the several measuring hoppers (1-5) pass through the corresponding chute (1-6), the collecting funnel (1-8) and the collecting hopper (1-10), the corresponding collecting hopper (1-10) driving device (1-9) drives the materials in the collecting hopper (1-10) through the chute (1-11) and the qualified material discharge port (1-12) and discharges the materials into the material cup waiting for reweighting, thereby completing the reweighting operation of the material cup containing the materials.

8. The method for operating a quantitative weighing system according to claim 7, characterized in that: The 20 feeding hoppers (1-4) are arranged in a circle and sorted in sequence, wherein the feeding hoppers (1-4) with numbers 1 to 10 and their corresponding measuring hoppers (1-5), chutes (1-6) correspond to a collecting funnel (1-8), a collecting hopper (1-10) and a driving device (1-9) for the collecting hopper (1-10), as well as a set of chutes (1-11), a discharge port for qualified materials (1-12) and a discharge port for unqualified materials (1-13), forming area A; wherein the feeding hoppers (1-11 to 20) with numbers 1 to 20 and their corresponding measuring hoppers (1-5) and chutes (1-6) correspond to a collecting funnel (1-8), a collecting hopper (1-10) and a driving device (1-9) for the collecting hopper (1-10), as well as a set of chutes (1-11), a discharge port for qualified materials (1-12) and a discharge port for unqualified materials (1-13), form area A; -4) and its corresponding measuring hopper (1-5), chute (1-6) corresponding to a collecting funnel (1-8), a collecting hopper (1-10) and a driving device (1-9) for the collecting hopper (1-10), as well as another set of chutes (1-11), a qualified material discharge port (1-12) and an unqualified material discharge port (1-13), forming area B; area A and area B are independent of each other, and perform combined calculations to select the most appropriate materials for several measuring hoppers (1-5), and complete the reweighting operation of the corresponding material cups containing the materials; In step S3, when the controller cannot select the appropriate materials of several measuring hoppers (1-5) for unloading by combined calculation according to the difference, the materials in all the corresponding measuring hoppers (1-5) are regarded as unqualified reweight materials. At this time, the controller controls the materials of all the measuring hoppers (1-5) to pass through the corresponding chute (1-6), the collecting funnel (1-8) and the collecting hopper (1-10), and the corresponding collecting hopper (1-10) driving device (1-9) discharges the materials in the collecting hopper (1-10) out of the combination weigher through the chute (1-11) and the unqualified material discharge port, and repeats step S3 until the controller selects the appropriate materials of several measuring hoppers (1-5) for unloading by combined calculation to form qualified reweight materials, and completes the reweighting operation of the material cup containing the material.

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