Material weighing device

Abstract

A 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. By arranging the large scale hopper and the small scale hopper, accurate control can be realized for materials which are light in specific gravity, large in block head and high in requirements on feeding speed and precision, so that high weighing speed and precision are achieved.

Description

Technical Field

[0001] This utility model relates to the field of material weighing technology, and in particular to a material weighing device. Background Technology

[0002] Products already available in the domestic market typically employ the traditional weighing approach, which uses a single weighing unit and employs fast and slow feeding methods to achieve weighing accuracy.

[0003] For example, CN107244435A discloses an automatic feeding and weighing device and method, including a weighing device, a feeding hopper, a movable gate assembly, a vibrating feeder, and a controller; the weighing device includes a weighing hopper; the feeding hopper is located above the weighing hopper, the upper end of the feeding hopper is provided with a feed inlet, the side wall of the feeding hopper is provided with a distribution port, and the lower end of the feeding hopper is provided with a discharge port for feeding material into the weighing hopper; the movable gate assembly is movably disposed in the feeding hopper for adjusting the opening of the discharge port; the vibrating feeder has a receiving port located below the distribution port and a feeding port for feeding material into the weighing hopper; the controller is electrically connected to the weighing device, the movable gate assembly, and the vibrating feeder, and controls the movable gate assembly and the vibrating feeder according to the weighing result of the weighing device.

[0004] However, while this weighing method is sufficient for most materials, it struggles to meet the requirements for special materials, such as large pieces of material with low specific gravity and high weighing accuracy. Because of the low specific gravity, achieving the specified packaging weight necessitates a larger weighing hopper, resulting in a heavier weighing weight and a larger sensor range, which in turn reduces the accuracy of the weighing system itself. Secondly, controlling the accuracy becomes even more difficult when dealing with larger material sizes and achieving a certain weighing speed. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a structural material weighing device with fast weighing speed and high weighing accuracy.

[0006] The technical solution of this utility model is: a material weighing device, including a feeding mechanism, a vibrating feeder, and a weighing mechanism; the weighing mechanism includes a small weighing hopper and a large weighing hopper, the inlet of the small weighing hopper is connected to the outlet of the vibrating feeder; the inlet of the large weighing hopper is connected to the outlet of the feeding mechanism; the small weighing hopper is provided with a first weighing sensor for detecting the weight of the material in the small weighing hopper, and the large weighing hopper is provided with a second weighing sensor for detecting the weight of the material in the small weighing hopper.

[0007] Furthermore, the feeding mechanism and the vibrating feeder divide the material through a distributor, and the discharge port of the distributor divides into a first distribution channel and a second distribution channel; the first distribution channel extends to the inlet side of the feeding mechanism, and the second distribution channel extends to the inlet side of the vibrating feeder.

[0008] Furthermore, the feeding mechanism is a belt feeding mechanism, including a frame, on which a belt drive assembly and a tilting and cutting assembly are provided; the tilting and cutting assembly includes a cutting gate and a tilting drive mechanism for controlling the rotation of the cutting gate; the cutting gate is located at the conveying end of the belt drive assembly and above the feed inlet of the large weighing hopper.

[0009] Furthermore, the belt drive assembly includes a conveyor belt and a geared motor that drives its rotation, and baffles are provided on both sides of the conveyor belt; the tilting drive mechanism includes a double-stroke cylinder and a tilting mechanism, and the piston rod end of the double-stroke cylinder is connected to the cutting gate via the tilting mechanism.

[0010] Furthermore, the small weighing hopper includes a small weighing hopper body, and the first weighing sensor is connected to the small weighing hopper body; the bottom of the small weighing hopper body is provided with a first weighing hopper door, and the first weighing hopper door is controlled to open and close by a first cylinder.

[0011] Furthermore, the large weighing hopper includes a large weighing hopper body, and the second weighing sensor is connected to the large weighing hopper body; a second weighing hopper door is provided at the bottom of the large weighing hopper body, and the second weighing hopper door is controlled to open and close by a second cylinder.

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

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

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

[0015] Furthermore, an adjusting material pipe is fitted at the lower end of the second material distribution channel, and the adjusting material pipe extends into the feed inlet of the vibrating feeder to adjust the material flow rate in the second material distribution channel.

[0016] The beneficial effects of this utility model are:

[0017] (1) By setting up a large weighing hopper and a small weighing hopper, the large weighing hopper can meet the needs of materials with larger size. Although the large weighing hopper bears a large weight of material, its main function is to perform preliminary weighing of the material, and distribute the load to the larger weighing hopper, thereby reducing the load of each sensor. The small weighing hopper solves the problem of insufficient accuracy of the large weighing hopper. It compensates for the lack of accuracy by high-precision weighing, thereby achieving a balance between accuracy and load, and avoiding the situation where a single sensor cannot meet the accuracy requirements under a large material load. Furthermore, the design of the large weighing hopper can accommodate more material and increase the speed during preliminary weighing, while the small weighing hopper can accurately adjust the weight when the weighing is close to the target weight. The combination of these two can effectively improve the overall weighing speed.

[0018] (2) By nesting the small weighing bucket inside the large weighing bucket, the structure is made very compact;

[0019] (3) By using a distributor to distribute materials, the materials can be fed into the conveyor belt and the vibrating feeder respectively, which greatly improves the ease of operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 Top view of the embodiment shown;

[0022] Figure 3 yes Figure 1 Side view of the embodiment shown;

[0023] Figure 4 yes Figure 1 A partially enlarged schematic diagram of the embodiment shown;

[0024] Figure 5 yes Figure 4 An enlarged schematic diagram of the belt feeder mechanism in the embodiment shown;

[0025] Figure 6 yes Figure 4 An enlarged schematic diagram of the small scale bucket in the embodiment shown;

[0026] Figure 7 yes Figure 1 A front view of the embodiment shown;

[0027] Figure 8 yes Figure 7 An enlarged schematic diagram of the large scale container in the embodiment shown.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 1. Belt feeding mechanism; 101. Frame; 102. Gear motor; 103. Double-stroke cylinder; 104. Cylinder support; 105. Conveyor belt; 106. Baffle; 107. Baffle bracket; 108. First joint bearing; 109. Crank; 110. Shaft; 111. Bearing with mounting seat; 112. Rotary arm; 113. Cut-off gate;

[0030] 2. Distributor; 201. Adjusting feed pipe;

[0031] 3. Small weighing hopper; 301. Weighing hopper support component; 302. First weighing sensor; 303. First rod end joint bearing; 304. First cylinder; 305. First connecting component; 306. First weighing hopper door; 307. Small weighing hopper body;

[0032] 4. Vibrating feeder;

[0033] 5. Large weighing hopper; 501. Second weighing sensor; 502. Second connector; 503. Second rod end joint bearing; 504. Large weighing hopper body; 505. Second cylinder; 506. Second weighing hopper door; 507. Second joint bearing; 508. Third rod end joint bearing. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1-3 As shown: A material weighing device includes a belt feeder 1, a distributor 2, a weighing mechanism, and a vibrating feeder 4; the distributor 2 is divided into two distribution channels, one of which extends above the belt feeder 1 for feeding material to the belt feeder 1, and the other of which extends above the vibrating feeder 4 for feeding material to the vibrating feeder 4; the weighing mechanism is located between the belt feeder 1 and the vibrating feeder 4 for weighing the material coming from the belt feeder 1 or the vibrating feeder 4.

[0036] like Figure 4 and Figure 5 As shown: In this embodiment, the belt feeding mechanism 1 includes a frame 101, a geared motor 102, a double-stroke cylinder 103, a conveyor belt 105, a tilting mechanism, and a cutting gate 113; wherein the geared motor 102 and the double-stroke cylinder 103 are mounted on the frame 101, the conveyor belt 105 is controlled to rotate by the geared motor, and the piston rod of the double-stroke cylinder 103 is connected to the cutting gate 113 through the tilting mechanism.

[0037] Specifically, the frame 101 includes two opposing side plates and supports connecting the two side plates. A drive roller is located at one end between the two side plates, and a driven roller at the other end. A conveyor belt 105 is fitted onto the drive roller and the driven roller. A geared motor 102 is mounted on the frame 101 and connected to the shaft end of the drive roller to drive the drive roller to rotate, thereby driving the belt 105 to rotate. Cylinder supports 104 are symmetrically mounted on the side plates. The tail ends of two double-stroke cylinders 103 are respectively hinged to their corresponding cylinder supports 104, forming a symmetrical structure. Two baffle supports 107 are also mounted on each side plate. The baffle supports 107 extend upwards and connect to baffles 106 to shield the material transported on the conveyor belt 105, preventing material from splashing or scattering. Preferably, the double-stroke cylinders 103 are located between the two baffle supports 107 on the corresponding side plates.

[0038] A tilting mechanism is symmetrically installed on both side plates. The tilting mechanism includes a first joint bearing 108, a crank 109, a rotating shaft 110, a seated bearing 111, and a rotating arm 112. 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. A mounting plate is connected to the side plate away from the reduction motor 102. The seated bearing 111 is fixed on the mounting plate. The rotating shaft 110 is connected to the inner hole of the seated 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. The other end of the rotating arm 112 is welded to the material cutting gate 113.

[0039] In this embodiment, the distributor 2 is located above the belt feeder 1, the weighing mechanism, and the vibrating feeder 4. The distributor's outlet is divided into distribution channels, namely, a first distribution channel and a second distribution channel. The first distribution channel extends above the conveyor belt 105 and into the baffles 106 on both sides. The second distribution channel extends above the vibrating feeder 4, and an adjusting pipe 201 is fitted at the lower end of the second distribution channel. The adjusting pipe 201 extends into the vibrating feeder 4 and is used to adjust the material flow rate in the second distribution channel. For example, the adjusting pipe 201 has two side holes extending along its length on its two side walls. An adjusting bolt is installed in each side hole, and a valve plate is installed inside the adjusting pipe 201. The valve plate is connected to the adjusting bolt. By moving the adjusting bolt in the side hole, the rotation angle of the valve plate is controlled, thereby adjusting the material flow rate.

[0040] In this embodiment, the weighing mechanism includes a small weighing hopper 3 and a large weighing hopper 5.

[0041] Specifically, such as Figure 6As shown: The small weighing hopper 3 includes a small weighing hopper body 307, a first weighing sensor 302, and a first cylinder 304. The first weighing sensor 302 is mounted on the back of the small weighing hopper body 307 via a weighing hopper support 301. The small weighing hopper body 307 has a cavity structure, and its top is provided with a feed inlet that connects to the discharge outlet of the vibrating feeder 4, that is, the discharge outlet of the vibrating feeder 4 extends above the feed inlet of the small weighing hopper body 307. The bottom of the small weighing hopper body 307 is provided with a first weighing hopper door 306, and the side of the small weighing hopper body 307 is provided with a first cylinder 304. The tail end of the first cylinder 304 is hinged to the small weighing hopper body 307, and the piston rod end is screwed to the first connecting piece 305. The first connecting piece 305 is hinged to the side of the first weighing hopper door 306. The back of the small weighing hopper body 307 is fixed with a first rod end spherical bearing 303, and the lower end of the first rod end spherical bearing 303 is hinged to the lug on the rear side of the first weighing hopper door 306. The first weighing hopper door 306 is sealed to the bottom of the small weighing hopper body 307 to prevent material leakage. When unloading is required, the first weighing hopper door 306 is opened by the first cylinder 304. During the weighing process of the small weighing hopper, the first cylinder 304 controls the first weighing hopper door 306 to be closed. The second weighing hopper door 506 described below operates on the same principle as the first weighing hopper door 306, and will not be described in detail later.

[0042] like Figure 7 and Figure 8 As shown: The large weighing hopper 5 includes a large weighing hopper body 504, a second weighing sensor 501, and a second cylinder 505. A second connecting member 502 is hinged to the side of the large weighing hopper body 504, and the second connecting member 502 is fixedly connected to the second weighing sensor 501; a second rod end joint bearing 503 is provided below the second connecting member 502, the lower end of the second rod end joint bearing 503 is fixed to the large weighing hopper body 504, and the upper end is hinged to the second connecting member 502. Preferably, the second weighing sensor 501 is a dynamic weighing sensor, which enables the second weighing sensor 501 to perform dynamic measurements in dynamic working environments, especially under material inflow / outflow, tilting, or other dynamic behaviors of the large weighing hopper 5, allowing for more accurate capture of real-time weight data and providing effective feedback during dynamic operation, while static verification is performed after feeding stops to improve accuracy. The tail end of the second cylinder 505 is hinged to the side of the large weighing hopper body 504, and the piston rod end is screwed to the second spherical bearing 507; the second spherical bearing 507 is hinged to the side of the second weighing hopper door 506; the second weighing hopper door 506 is located on the bottom surface of the large weighing hopper body 504, one end of the second weighing hopper door 506 is hinged to the third rod end spherical bearing 508, and the third rod end spherical bearing 508 is fixed to the front of the large weighing hopper body 504.

[0043] The large weighing hopper body 504 has a cavity structure and a larger volume than the small weighing hopper body 307. It has a feed inlet at the top, which connects to the discharge end of the conveyor belt 105. The material-cutting gate 113 is located at the conveying end of the conveyor belt and above the feed inlet of the large weighing hopper body 504. Driven by a double-stroke cylinder 103, it is rotated up and down via a tilting mechanism. For example, tilting upwards opens the gate, allowing material to enter the large weighing hopper body 504, while tilting downwards closes it, intercepting the material on the conveyor belt 105. Preferably, the material-cutting gate 113 is designed as an arc-shaped structure with side guards on both sides.

[0044] In this embodiment, the large weighing hopper is fixed on the frame 101, and the small weighing hopper 3 is fixed on the inner wall of the large weighing hopper body near the vibrating feeder. This is equivalent to the small weighing hopper being nested inside the large weighing hopper, making the structure very compact. Furthermore, the small weighing hopper has a smaller tare weight and higher weighing accuracy.

[0045] In this embodiment, a control system is also included. The control system includes a controller, and all the aforementioned electric components are connected to the controller. For example, the first and second weighing sensors are connected to the input terminal of the controller, and the geared motor and various cylinders are connected to the output terminal of the controller.

[0046] The working principle of this embodiment is as follows:

[0047] When weighing begins, the geared motor 102 starts and drives the conveyor belt 105 to rotate, conveying the material output from the first distribution channel of the distributor 2. At this time, both strokes of the double-stroke cylinder 103 are extended, driving the crank 109 to rotate, which in turn drives the rotating shaft 110 to rotate. The rotating shaft 110 then drives the rotating arm 112 to rotate upward, causing the material gate 113 to flip upward and open to its maximum state for rapid feeding into the large weighing hopper 504. When the set rapid feeding point is reached, the double-stroke cylinder 103 retracts one stroke, and the speed of the conveyor belt 105 decreases, entering a slow feeding state. When the second weighing sensor 501 detects that the material has reached the set weight, the geared motor 102 controls the conveyor belt 105 to stop rotating, and the double-stroke cylinder 103 retracts the other stroke, and the material gate 113 moves down to its lowest point to intercept the material on the conveyor belt 105. While the belt feeder 1 feeds material into the large weighing hopper body 504, the vibrating feeder also starts to feed material into the small weighing hopper body 307. The first weighing sensor 302 and the second weighing sensor 501 respectively feed the material into the small weighing hopper body 307 and the large weighing hopper body 504.

[0048] A preferred weighing method in this embodiment is as follows: both weighing hoppers feed material according to a set target weight, but the feeding time of the smaller weighing hopper 3 should be longer than that of the larger weighing hopper 5. This is because when the weight of the larger weighing hopper 5 reaches the set value and feeding stops, a static verification of the material weight in the larger weighing hopper is required (i.e., the actual weight is read after all the material has fallen into the larger weighing hopper). Based on the actual weight, the required weighing value in the smaller weighing hopper 3 is determined, and finally, the smaller weighing hopper 3 replenishes the weight, thereby achieving the weighing and measurement of special materials. In other words, the larger and smaller weighing hoppers weigh material simultaneously to reach a set target weight. When the weight in the larger weighing hopper reaches the set value, its feeding stops. However, at this time, the material weight in the larger weighing hopper still needs to undergo a static verification to ensure more accurate weighing. Then, based on the actual weight in the larger weighing hopper, the weight that the smaller weighing hopper needs to replenish is determined, and finally, the smaller weighing hopper completes the accurate total weighing. This method ensures both weighing accuracy and high weighing speed.

[0049] In summary, this embodiment has the following advantages:

[0050] (1) By setting up a large weighing hopper and a small weighing hopper, the large weighing hopper can meet the needs of materials with larger sizes. Although the large weighing hopper bears a large weight of material, its main function is to perform preliminary weighing of the material, distributing the load across the larger hopper, thereby reducing the load on each sensor. The small weighing hopper solves the problem of insufficient accuracy of the large weighing hopper by compensating through high-precision weighing, thus 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 weighing hopper can accommodate more material, increasing the speed during preliminary weighing, while the small weighing hopper precisely adjusts the weight when the weighing approaches the target weight. The combination of these two can effectively improve the overall weighing speed. It can be said that by setting up a large weighing hopper and a small weighing hopper, precise control can be achieved for materials with light specific gravity, large size, and high requirements for feeding speed and accuracy, thereby achieving a high weighing speed and accuracy.

[0051] (2) By nesting the small weighing bucket inside the large weighing bucket, the structure is made very compact.

[0052] (3) By using a distributor to distribute materials, the materials can be fed into the conveyor belt and the vibrating feeder respectively, which greatly improves the ease of operation.

[0053] Furthermore, the term "connection" should be interpreted broadly, for example, it can include fixed connections, detachable connections, or integral connections; it can include direct connections or indirect connections through an intermediate medium, and it can also include internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this 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 hopper and a large weighing hopper. The inlet of the small weighing hopper is connected to the outlet of the vibrating feeder. The inlet of the large weighing hopper is connected to the outlet of the feeding mechanism. The small weighing hopper is equipped with a first weighing sensor for detecting the weight of the material inside the small weighing hopper, and the large weighing hopper is equipped with a second weighing sensor for detecting the weight of the material inside the small weighing hopper.

2. The material weighing device according to claim 1, characterized in that, The feeding mechanism and the vibrating feeder divide the material through a distributor. The discharge port of the distributor divides into a first distribution channel and a second distribution channel. The first distribution channel extends to the inlet side of the feeding mechanism, and the second distribution channel extends to the inlet 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, including a frame, on which a belt drive assembly and a tilting and cutting assembly are provided; the tilting and cutting assembly includes a cutting gate and a tilting drive mechanism for controlling the rotation of the cutting gate; the cutting gate is located at the end of the conveying of the belt drive assembly and above the feed inlet of the large weighing hopper.

4. The material weighing device according to claim 3, characterized in that, The belt drive assembly includes a conveyor belt and a geared motor that drives its rotation. Baffles are provided on both sides of the conveyor belt. The tilting drive mechanism includes a double-stroke cylinder and a tilting mechanism. The piston rod end of the double-stroke cylinder is connected to the cutting gate via the tilting mechanism.

5. The material weighing device according to claim 1 or 2, characterized in that, The small weighing hopper includes a small weighing hopper body, and the first weighing sensor is connected to the small weighing hopper body; the bottom of the small weighing hopper body is provided with a first weighing hopper door, and the first weighing hopper door is controlled to open and close by a first cylinder.

6. The material weighing device according to claim 1 or 2, characterized in that, The large weighing hopper includes a large weighing hopper body, and the second weighing sensor is connected to the large weighing hopper body; the bottom of the large weighing hopper body is provided with a second weighing hopper door, and the second weighing hopper door is controlled to open and close by a second cylinder.

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

8. The material weighing device according to claim 6, characterized in that, The large weighing hopper body is connected to a second connecting member and a second rod end joint bearing; the second connecting member is hinged to the large weighing hopper body and fixedly connected to a second weighing sensor; one end of the second rod end joint bearing is fixed to the large weighing hopper body, and the other end is hinged to the second connecting member; the tail end of the second cylinder is hinged to the large weighing hopper body, the piston rod end is screwed to the joint bearing, the joint bearing is hinged to the second weighing hopper door, one end of the second weighing hopper door is also hinged to a third rod end joint bearing, and the third rod end joint bearing is fixed to the large weighing hopper body.

9. The material weighing device according to claim 6, characterized in that, The small weighing bucket is fixed to the inner wall of the large weighing bucket body.

10. The material weighing device according to claim 2, characterized in that, The lower end of the second material distribution channel is fitted with an adjusting material pipe, which extends into the feed inlet of the vibrating feeder to adjust the material flow rate in the second material distribution channel.

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