Material weighing device and weighing method thereof

Abstract

The invention discloses a material weighing device and a weighing method thereof. The material weighing device comprises a feeding mechanism, a vibration feeder and a weighing mechanism, the weighing mechanism comprises a small scale hopper and a large scale hopper, and a feed port of the small scale hopper is communicated with a discharge port of the vibrating feeder; a feeding hole of the large scale hopper is communicated with a discharging hole of the feeding mechanism; the small scale hopper is provided with a first weighing sensor used for detecting the weight of materials in the small scale hopper, and the large scale hopper is provided with a second weighing sensor used for detecting the weight of the materials in the small scale hopper. The invention further comprises a weighing method of the material weighing device. By arranging the large scale hopper and the small scale hopper, accurate control can be achieved for materials which are light in specific gravity, large in block head and high in feeding speed and precision requirements, and therefore the high weighing speed and precision are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of material weighing, in particular to a material weighing device and a weighing method thereof. Background Art

[0002] Existing products on the domestic market usually adopt the traditional weighing concept, that is, using a weighing unit and a fast or slow feeding method to achieve weighing accuracy.

[0003] For example, CN107244435A discloses an automatic feeding and weighing device and a weighing method, comprising a weighing device, a feeding hopper, a movable door assembly, a vibrating feeder and a controller; the weighing device comprises a weighing hopper; the feeding hopper is located above the weighing hopper, the upper end of the feeding hopper is provided with a feeding port, the side wall of the feeding hopper is provided with a discharging port, and the lower end of the feeding hopper is provided with a discharging port for feeding materials into the weighing hopper; the movable door assembly can be movably arranged on the feeding hopper to adjust the opening of the discharging port; the vibrating feeder has a receiving port arranged below the discharging port and a feeding port for feeding materials into the weighing hopper; the controller is electrically connected to the weighing device, the movable door assembly and the vibrating feeder, and controls the movable door assembly and the vibrating feeder according to the weighing result of the weighing device.

[0004] However, this weighing method can meet the requirements for general materials, but it is difficult to meet the requirements for special materials, such as large bulk materials with high weighing accuracy and small specific gravity. Because the specific gravity is too small and the specified packaging weight must be reached, the scale bucket must be made larger, which results in a larger weight of the weighing itself, and the larger the range of the sensor, which in turn leads to a decrease in the accuracy of the weighing system itself. Secondly, the bulk of the material is large, and a certain weighing speed must be achieved, making it more difficult to control the accuracy. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a material weighing device and a weighing method thereof with fast weighing speed and high weighing accuracy.

[0006] The technical solution of the present invention is: A material weighing device of the present invention comprises a feeding mechanism, a vibrating feeder and a weighing mechanism; the weighing mechanism comprises a small weighing bucket and a large weighing bucket, the feed port of the small weighing bucket is connected with the discharge port of the vibrating feeder; the feed port of the large weighing bucket is connected with the discharge port of the feeding mechanism; the small weighing bucket is provided with a first weighing sensor for detecting the weight of the material in the small weighing bucket, and the large weighing bucket is provided with a second weighing sensor for detecting the weight of the material in the small weighing bucket.

[0007] Furthermore, the feeding mechanism and the vibrating feeder divide the materials through a divider, and the discharge port of the divider divides the first dividing channel and the second dividing channel; the first dividing channel extends to the feed port side of the feeding mechanism, and the second dividing channel extends to the feed port side of the vibrating feeder.

[0008] Furthermore, the feeding mechanism is a belt feeding mechanism, which includes a frame on which a belt drive assembly and a flip material cutting assembly are provided; the flip material cutting assembly includes a material cutting door and a flip drive mechanism for controlling the rotation of the material cutting door; the material cutting door is arranged at the conveying end of the belt drive assembly and is located above the feed port of the large weighing bucket.

[0009] Furthermore, the belt drive assembly includes a conveying belt and a reduction motor driving the conveying belt to rotate, and baffles are provided on both sides of the conveying belt; the flipping drive mechanism includes a two-stroke cylinder and a flipping mechanism, and the piston rod end of the two-stroke cylinder is connected to the material cutting gate via the flipping mechanism.

[0010] Furthermore, the small scale bucket includes a small scale bucket body, and the first weighing sensor is connected to the small scale bucket body; a first scale bucket door is provided at the bottom of the small scale bucket body, and the opening and closing of the first scale bucket door is controlled by a first cylinder.

[0011] Furthermore, the large weighing bucket comprises a large weighing bucket body, and the second weighing sensor is connected to the large weighing bucket body; a second weighing bucket door is provided at the bottom of the large weighing bucket body, and the opening and closing of the second weighing bucket door is controlled by a second cylinder.

[0012] Furthermore, a feed port is provided on the top of the small scale bucket body, which is connected to the discharge port of the vibrating feeder; the tail end of the first cylinder is hinged to the small scale bucket body, the piston rod end is screwed to the first connecting piece, the first connecting piece is hinged to the first scale bucket door, and the first scale bucket door is also hinged to the first rod end joint bearing fixed on the small scale bucket body.

[0013] Furthermore, a second connecting piece and a second rod-end joint bearing are connected to the large scale bucket body; the second connecting piece is hinged to the large scale bucket body, and the second connecting piece is fixedly connected to the second weighing sensor; one end of the second rod-end joint bearing is fixed to the large scale bucket body, and the other end is hinged to the second connecting piece; the tail end of the second cylinder is hinged to the large scale bucket body, the piston rod end is screwed to the joint bearing, the joint bearing is hinged to the second scale bucket door, and one end of the second scale bucket door is also hinged to the third rod-end joint bearing, and the third rod-end joint bearing is fixed to the large scale bucket body.

[0014] Furthermore, the small weighing bucket is fixed on the inner wall of the large weighing bucket body.

[0015] Furthermore, a regulating material pipe is sleeved on the lower end of the second material distribution channel, and the regulating material pipe extends into the feed port of the vibrating feeder and is used to regulate the material flow in the second material distribution channel.

[0016] A weighing method of a material weighing device of the present invention comprises the following steps: S1: Set the target weight value of the large and small weighing buckets; S2: When starting to work, the material is fed into the large weighing hopper, and at the same time, the material is fed into the small weighing hopper through the vibrating feeder; and when the material is fed into the large weighing hopper, it is fed quickly first, and when it is detected that the material weight reaches the fast feeding setting value, it enters the slow feeding state; S3: When it is detected that the weight of the material in the large weighing bucket reaches the target weight value, the feeding is stopped, and the weight of the material in the large weighing bucket is statically reviewed to obtain the actual weight of the material; S4: According to the actual weight of the material in the large weighing bucket, determine the amount of additional material to be fed into the small weighing bucket, so that the total weight of the material eventually reaches the predetermined target weight.

[0017] Beneficial effects of the present invention: (1) By setting up a large scale bucket and a small scale bucket, the large scale bucket can accommodate larger materials. Although the large scale bucket carries a larger weight of materials, its main function is to perform preliminary weighing of the materials and distribute the load to the larger scale bucket, thereby reducing the load of each sensor. The small scale bucket solves the problem of insufficient accuracy of the large scale bucket and compensates for it through high-precision weighing, thereby achieving a balance between accuracy and load, avoiding the situation where a single sensor cannot meet the accuracy requirements under a large material load. Furthermore, the design of the large scale bucket can accommodate more materials and increase the speed during preliminary weighing, while the small scale bucket accurately adjusts the weight when the weighing approaches the target weight. The combination of the two can effectively improve the overall weighing speed; (2) By nesting the small scale bucket in the large scale bucket, the structure is made very compact; (3) Material can be divided into conveyor belt and vibrating feeder by material divider, which greatly improves the convenience of operation; (4) By adopting a combined measurement method of a large scale bucket and a small scale bucket, the large scale bucket can undertake the main material weighing task and can quickly approach the target weight. Through static review, the accuracy of the weighing process can be ensured; the small scale bucket, as a key role in feeding, can adjust the feeding amount according to the actual weight of the large scale bucket, thereby accurately supplementing the slight weight difference and ensuring that the final material weight reaches the set target. This can not only improve the accuracy and response speed of weighing, but also optimize the feeding process through more sophisticated feeding control, save materials and time, and improve the efficiency and stability of the overall system; (5) The material enters the small weighing bucket through the vibrating feeder. The vibrating feeder can accurately control the feeding rate of the material by adjusting the vibration amplitude, frequency and other parameters. This is very important for the fine weighing of the small weighing bucket. It can ensure that the amount of material fed each time is very close to the required weight, avoiding over- or under-feeding, thus facilitating the combined measurement of the small weighing bucket and the large weighing bucket; (6) By setting a material cut-off gate between the large scale bucket and the conveyor belt, precise cut-off control can be achieved. When the predetermined weight is reached, the gate can be quickly closed to prevent more material from flowing into the large scale bucket, thereby maintaining precise control of the material flow. If the conveyor belt is stopped directly, due to the inertia of the material and the sliding of the remaining material, excessive material may enter the large scale bucket, thereby affecting the weighing accuracy of the large scale bucket to reach the target weight value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 yes Figure 1 a top view of the illustrated embodiment; Figure 3 yes Figure 1 a side view of the illustrated embodiment; Figure 4 yes Figure 1 A partial enlarged schematic diagram of the embodiment shown; Figure 5 yes Figure 4 An enlarged schematic diagram of the belt feeding mechanism of the illustrated embodiment; Figure 6 yes Figure 4 An enlarged schematic diagram of a small scale bucket of the illustrated embodiment; Figure 7 yes Figure 1 a front view of the illustrated embodiment; Figure 8 yes Figure 7 An enlarged schematic diagram of the large weighing bucket of the illustrated embodiment.

[0019] Description of the accompanying drawings: 1. Belt feeding mechanism; 101. Frame; 102. Speed ​​reduction motor; 103. Double-stroke cylinder; 104. Cylinder support; 105. Conveying belt; 106. Baffle; 107. Baffle support; 108. First joint bearing; 109. Crank; 110. Rotating shaft; 111. Bearing with seat; 112. Rotating arm; 113. Cutting door; 2. Distributor; 201. Adjusting material pipe; 3. Small weighing bucket; 301. Scale bucket support; 302. First weighing sensor; 303. First rod end joint bearing; 304. First cylinder; 305. First connecting piece; 306. First weighing bucket door; 307. Small weighing bucket body; 4. Vibrating feeder; 5. Large weighing bucket; 501. Second weighing sensor; 502. Second connecting piece; 503. Second rod end joint bearing; 504. Large weighing bucket body; 505. Second cylinder; 506. Second weighing bucket door; 507. Second joint bearing; 508. Third rod end joint bearing. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1~Figure 3 As shown: a material weighing device, including a belt feeding mechanism 1, a distributor 2, a weighing mechanism and a vibrating feeder 4; the distributor 2 is divided into two distribution channels, one distribution channel extends to the top of the belt feeding mechanism 1, and is used to send materials to the belt feeding mechanism 1, and the other distribution channel extends to the top of the vibrating feeder 4, and is used to send materials to the vibrating feeder 4; the weighing mechanism is arranged between the belt feeding mechanism 1 and the vibrating feeder 4, and is used to weigh the incoming materials of the belt feeding mechanism 1 or the vibrating feeder 4.

[0022] like Figure 4 and Figure 5 As shown: In this embodiment, the belt feeding mechanism 1 includes a frame 101, a reduction motor 102, a two-stroke cylinder 103, a conveying belt 105, a flipping mechanism and a material cutting door 113; wherein the reduction motor 102 and the two-stroke cylinder 103 are installed on the frame 101, the conveying belt 105 is controlled to rotate by the reduction motor, and the piston rod of the two-stroke cylinder 103 is connected to the material cutting door 113 via the flipping mechanism.

[0023] Specifically, the frame 101 includes two side panels arranged opposite to each other and brackets connected to the side panels on both sides; a driving roller is provided at one end between the two side panels, and a driven roller is provided at the other end, and the conveying belt 105 is sleeved on the driving roller and the driven roller. The reduction motor 102 is installed on the frame 101 and connected to the shaft end of the driving roller, and is used to drive the driving roller to rotate, thereby driving the belt 105 to rotate. Cylinder supports 104 are also symmetrically installed on the side panels on both sides, and the tail ends of the two double-stroke cylinders 103 are respectively hinged to the corresponding cylinder supports 104 to form a symmetrical structure. Two baffle brackets 107 are also installed on each side panel, and the baffle brackets 107 on both sides extend upward and are connected to the baffle 106, which are used to shield the materials transported on the conveying belt 105 to prevent the materials from splashing or scattering. Preferably, the double-stroke cylinder 103 is arranged between the two baffle brackets 107 on the corresponding side panels.

[0024] The side panels on both sides are symmetrically installed with a flip mechanism, which includes a first joint bearing 108, a crank 109, a rotating shaft 110, a seat bearing 111 and a rotating arm 112. Among them, the first joint bearing is screwed to the piston rod end of the double-stroke cylinder 103 and hinged to the lower end of the crank 109; the side panel is connected to a mounting plate at the end away from the reduction motor 102, and a seat bearing 111 is fixed on the mounting plate. The rotating shaft 110 is connected to the inner hole of the seat bearing 111, the upper end of the crank 109 is clamped to the outer shaft end of the rotating shaft 110, one end of the rotating arm 112 is clamped to the inner shaft end of the rotating shaft 110, and the other end of the rotating arm 112 is welded to the material cut-off door 113 as a whole.

[0025] In this embodiment, the divider 2 is arranged above the belt feeding mechanism 1, the weighing mechanism and the vibrating feeder 4, and the discharge port of the divider is divided into the dividing channels, namely the first dividing channel and the second dividing channel; wherein the first dividing channel extends to the top of the conveying belt 105 and extends to the baffles 106 on both sides. The second dividing channel extends to the top of the vibrating feeder 4, and the lower end of the second dividing channel is sleeved with an adjusting material pipe 201, and the adjusting material pipe 201 extends into the vibrating feeder 4, which is used to adjust the material flow in the second dividing channel. For example: two waist holes extending along the length direction of the adjusting material pipe are provided on the two side walls of the adjusting material pipe 201, and an adjusting bolt is provided in the waist hole, and a valve plate is provided in the adjusting material pipe 201, and the valve plate is connected to the adjusting bolt. By moving the position of the adjusting bolt in the waist hole, the rotation angle of the valve plate is controlled to achieve material flow adjustment.

[0026] In this embodiment, the weighing mechanism includes a small weighing bucket 3 and a large weighing bucket 5.

[0027] Specifically, Figure 6As shown, the small scale bucket 3 includes a small scale bucket body 307, a first weighing sensor 302 and a first cylinder 304. The first weighing sensor 302 is installed on the back of the small scale bucket body 307 through the scale bucket support 301. The small scale bucket body 307 is a structure with a cavity, and a feed port is provided on the top thereof, which is connected to the discharge port of the vibrating feeder 4, that is, the discharge port of the vibrating feeder 4 extends to the top of the feed port of the small scale bucket body 307. The bottom of the small scale bucket body 307 is provided with a first scale bucket door 306, and the side of the small scale bucket body 307 is provided with a first cylinder 304. The tail end of the first cylinder 304 is hinged with the small scale bucket body 307, and the piston rod end is screwed with the first connecting member 305, and the first connecting member 305 is hinged with the side of the first scale bucket door 306; the back of the small scale bucket body 307 is fixed with a first rod end joint bearing 303, and the lower end of the first rod end joint bearing 303 is hinged with the ear seat on the rear side of the first scale bucket door 306. The first scale bucket door 306 is sealed and connected to the bottom of the small scale bucket body 307 to prevent material from leaking out; when unloading is required, the first scale bucket door 306 can be driven to open by the first cylinder 304, and during the weighing process of the small scale bucket, the first cylinder 304 controls the first scale bucket door 306 to be closed. The second scale bucket door 506 described below has the same principle as the first scale bucket door 306, and will not be described in detail later.

[0028] like Figure 7 and Figure 8 As shown: the large weighing bucket 5 includes a large weighing bucket body 504, a second weighing sensor 501 and a second cylinder 505. A second connecting piece 502 is hinged on the side of the large weighing bucket body 504, and the second connecting piece 502 is fixedly connected to the second weighing sensor 501; a second rod end joint bearing 503 is provided below the second connecting piece 502, and the lower end of the second rod end joint bearing 503 is fixed on the large weighing bucket body 504, and the upper end is hinged to the second connecting piece 502. Preferably, the second weighing sensor 501 is a dynamic weighing sensor, so that the second weighing sensor 501 can perform dynamic measurement in a dynamic working environment, especially when the material flows in and out, tilts or other dynamic behaviors of the large weighing bucket 5, allowing more accurate capture of real-time weight data, and providing effective feedback in dynamic operation, while performing static review after feeding stops to improve accuracy. The tail end of the second cylinder 505 is hinged to the side of the large weighing bucket body 504, and the piston rod end is screwed to the second joint bearing 507; the second joint bearing 507 is hinged to the side of the second weighing bucket door 506; the second weighing bucket door 506 is arranged on the bottom surface of the large weighing bucket body 504, and one end of the second weighing bucket door 506 is hinged to the third rod end joint bearing 508, and the third rod end joint bearing 508 is fixed to the front side of the large weighing bucket body 504.

[0029] The large scale bucket body 504 is a structure with a cavity, and its volume is larger than that of the small scale bucket body 307. A feed port is provided on the top thereof, and docks with the discharge end of the conveyor belt 105. The material-cutting door 113 is provided at the conveying end of the conveyor belt, and is located above the feed port of the large scale bucket body 504. It can be driven by the double-stroke cylinder 103 to turn up and down through the turning mechanism. For example, it can be turned up to open so that the material enters the large scale bucket body 504, and it can be turned down to close so that the material on the conveyor belt 105 is intercepted. Preferably, the material-cutting door 113 is designed as an arc-shaped structure with retaining edges on both sides.

[0030] In this embodiment, the large scale bucket body is fixed on the frame 101, and the small scale bucket 3 is fixed on the inner wall of the large scale bucket body close to the vibrating feeder, which is equivalent to the small scale bucket being nested in the large scale bucket, making the structure very compact; and the tare weight of the small scale bucket is smaller, and the weighing accuracy is higher.

[0031] In this embodiment, a control system is also included, which includes a controller. The aforementioned electric components are all connected to the controller, such as the first weighing sensor and the second weighing sensor are connected to the input end of the controller, and the reduction motor and various cylinders are connected to the output end of the controller.

[0032] The working principle of this embodiment is: When weighing starts, the reduction motor 102 starts to drive the conveyor belt 105 to rotate, which is used to convey the material output from the first material distribution channel of the distributor 2. At this time, the two strokes of the two-stroke cylinder 103 are both extended to drive the crank 109 to rotate, thereby driving the rotating shaft 110 to rotate, and the rotating shaft 110 then drives the rotating arm 112 to rotate upward, so that the material intercepting door 113 flips upward and opens to the maximum state, so as to quickly feed the material into the large weighing bucket body 504. When the set fast feeding point is reached, the two-stroke cylinder 103 will retract one stroke, and the speed of the conveyor belt 105 will decrease, entering the slow feeding state; when the second weighing sensor 501 detects that the material reaches the set weight, the reduction motor 102 controls the conveyor belt 105 to stop rotating, and the two-stroke cylinder 103 retracts another stroke, and the material intercepting door 113 moves down to the lowest point to intercept the material on the conveyor belt 105. While the belt feeding mechanism 1 feeds materials into the large weighing bucket body 504, the vibrating feeder also starts to feed materials into the small weighing bucket body 307, and the materials in the small weighing bucket body 307 and the large weighing bucket body 504 are respectively fed through the first weighing sensor 302 and the second weighing sensor 501.

[0033] In this embodiment, a weighing method is preferably as follows: both weighing buckets are fed according to the set target weight, that is, the target weight values ​​of the large weighing bucket and the small weighing bucket are set respectively, but the feeding time of the small weighing bucket 3 should be greater than the feeding time of the large weighing bucket 5, because when the weight of the large weighing bucket 5 reaches the set value and stops feeding, it is also necessary to statically review the weight of the material in the large weighing bucket (that is, read the actual weight after all the materials fall into the large weighing bucket), and then determine the required weighing value in the small weighing bucket 3 according to the actual weight, and finally make up the weight by the small weighing bucket 3, so as to realize the weighing and measurement of special materials. Among them, the feeding time can be set according to the feeding rate and weighing requirements to ensure that the small weighing bucket can continue to replenish materials after the large weighing bucket completes the material feeding and static review until the predetermined target weight is reached. That is: when the material enters the large weighing bucket through the conveyor belt, the feeding process is divided into fast feeding and slow feeding stages. When the large scale bucket reaches the set target weight, the feeding stops and a static review is performed. Since the feeding time of the small scale bucket must ensure that after the large scale bucket completes material feeding and static review, the small scale bucket has not yet completed its target weight weighing, so after the large scale bucket has completed the static review, the weight that needs to be added to the small scale bucket can be determined based on the actual weight of the large scale bucket, and finally the small scale bucket is used to complete the accurate total weighing. This method can ensure the accuracy of weighing and achieve a higher weighing speed.

[0034] In summary, this embodiment has the following advantages: (1) By setting up a large scale bucket and a small scale bucket, the large scale bucket can accommodate larger materials. Although the large scale bucket carries a larger weight of materials, its main function is to perform preliminary weighing of the materials and distribute the load to the larger scale bucket, thereby reducing the load of each sensor; the small scale bucket solves the problem of insufficient accuracy of the large scale bucket and compensates through high-precision weighing, thereby achieving a balance between accuracy and load, avoiding the situation where a single sensor cannot meet the accuracy requirements under a large material load; furthermore, the design of the large scale bucket can accommodate more materials and increase the speed during preliminary weighing, while the small scale bucket accurately adjusts the weight when the weighing approaches the target weight. The combination of the two can effectively improve the overall weighing speed. It can be said that by setting up a large scale bucket and a small scale bucket, for materials with light specific gravity, large size, and high feeding speed and accuracy requirements, precise control can be achieved, thereby achieving a higher weighing speed and accuracy.

[0035] (2) By nesting the small scale bucket in the large scale bucket, the structure is made very compact.

[0036] (3) Material can be divided into conveyor belt and vibrating feeder by material divider, which greatly improves the convenience of operation; (4) By adopting a combined measurement method of a large scale bucket and a small scale bucket, the large scale bucket can undertake the main material weighing task and can quickly approach the target weight. Through static review, the accuracy of the weighing process can be ensured; the small scale bucket, as a key role in feeding, can adjust the feeding amount according to the actual weight of the large scale bucket, thereby accurately supplementing the slight weight difference and ensuring that the final material weight reaches the set target. This can not only improve the accuracy and response speed of weighing, but also optimize the feeding process through more sophisticated feeding control, save materials and time, and improve the efficiency and stability of the overall system; (5) The material enters the small weighing bucket through the vibrating feeder. The vibrating feeder can accurately control the feeding rate of the material by adjusting the vibration amplitude, frequency and other parameters. This is very important for the fine weighing of the small weighing bucket. It can ensure that the amount of material fed each time is very close to the required weight, avoiding over- or under-feeding, thus facilitating the combined measurement of the small weighing bucket and the large weighing bucket; (6) By setting a material cut-off gate between the large scale bucket and the conveyor belt, precise cut-off control can be achieved. When the predetermined weight is reached, the gate can be quickly closed to prevent more material from flowing into the large scale bucket, thereby maintaining precise control of the material flow. If the conveyor belt is stopped directly, due to the inertia of the material and the sliding of the remaining material, excessive material may enter the large scale bucket, thereby affecting the weighing accuracy of the large scale bucket to reach the target weight value.

[0037] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection or integral connection; it can include direct connection, indirect connection through an intermediate medium, and can also include internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A material weighing device, comprising a feeding mechanism, a vibrating feeder and a weighing mechanism; characterized in that: The weighing mechanism includes a small weighing bucket and a large weighing bucket, the feed port of the small weighing bucket is connected with the discharge port of the vibrating feeder; the feed port of the large weighing bucket is connected with the discharge port of the feeding mechanism; the small weighing bucket is provided with a first weighing sensor for detecting the weight of the material in the small weighing bucket, and the large weighing bucket is provided with a second weighing sensor for detecting the weight of the material in the small weighing bucket.

2. The material weighing device according to claim 1, characterized in that: The feeding mechanism and the vibrating feeder divide the materials through a divider, and the discharge port of the divider divides the first dividing channel and the second dividing channel; the first dividing channel extends to the feeding port side of the feeding mechanism, and the second dividing channel extends to the feeding port side of the vibrating feeder.

3. The material weighing device according to claim 1 or 2, characterized in that: The feeding mechanism is a belt feeding mechanism, which includes a frame on which a belt drive assembly and a flip material cutting assembly are provided; the flip material cutting assembly includes a material cutting door and a flip drive mechanism for controlling the rotation of the material cutting door; the material cutting door is arranged at the conveying end of the belt drive assembly and is located above the feed port of the large weighing bucket.

4. The material weighing device according to claim 3, characterized in that: The belt drive assembly includes a conveying belt and a reduction motor driving the conveying belt to rotate, and baffles are provided on both sides of the conveying belt; the flipping drive mechanism includes a double-stroke cylinder and a flipping mechanism, and the piston rod end of the double-stroke cylinder is connected to the material cutting door via the flipping mechanism.

5. The material weighing device according to claim 1 or 2, characterized in that: The small weighing bucket includes a small weighing bucket body, the first weighing sensor is connected to the small weighing bucket body; a first weighing bucket door is provided at the bottom of the small weighing bucket body, and the opening and closing of the first weighing bucket door is controlled by a first cylinder; or the large weighing bucket includes a large weighing bucket body, the second weighing sensor is connected to the large weighing bucket body; a second weighing bucket door is provided at the bottom of the large weighing bucket body, and the opening and closing of the second weighing bucket door is controlled by a second cylinder.

6. The material weighing device according to claim 5, characterized in that: A feed port is provided on the top of the small scale bucket body, which is connected to the discharge port of the vibrating feeder; the tail end of the first cylinder is hinged to the small scale bucket body, the piston rod end is screwed to the first connecting piece, the first connecting piece is hinged to the first scale bucket door, and the first scale bucket door is also hinged to the first rod end joint bearing fixed on the small scale bucket body.

7. The material weighing device according to claim 5, characterized in that: The large weighing bucket body is connected with a second connecting piece and a second rod-end joint bearing; the second connecting piece is hinged to the large weighing bucket body, and the second connecting piece is fixedly connected to the second weighing sensor; one end of the second rod-end joint bearing is fixed to the large weighing bucket body, and the other end is hinged to the second connecting piece; the tail end of the second cylinder is hinged to the large weighing bucket body, the piston rod end is screwed to the joint bearing, the joint bearing is hinged to the second weighing bucket door, one end of the second weighing bucket door is also hinged to the third rod-end joint bearing, and the third rod-end joint bearing is fixed to the large weighing bucket body.

8. The material weighing device according to claim 5, characterized in that: The small weighing bucket is fixed on the inner wall of the large weighing bucket body.

9. The material weighing device according to claim 2, characterized in that: The lower end of the second material distribution channel is sleeved with a material regulating pipe, which extends into the feed port of the vibrating feeder and is used to regulate the material flow in the second material distribution channel.

10. A weighing method for a material weighing device, characterized in that: The following steps are involved: S1: Set the target weight value of the large and small weighing buckets; S2: When starting to work, the material is fed into the large weighing hopper, and at the same time, the material is fed into the small weighing hopper through the vibrating feeder; and when the material is fed into the large weighing hopper, it is fed quickly first, and when it is detected that the material weight reaches the fast feeding setting value, it enters the slow feeding state; S3: When it is detected that the weight of the material in the large weighing bucket reaches the target weight value, the feeding is stopped, and the weight of the material in the large weighing bucket is statically reviewed to obtain the actual weight of the material; S4: According to the actual weight of the material in the large weighing bucket, determine the amount of additional material to be fed into the small weighing bucket, so that the total weight of the material eventually reaches the predetermined target weight.

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