Combination scale with failing weight rejector

Abstract

The application discloses a combined scale with a device for removing unqualified weights, wherein a material falling mechanism comprises a first material falling hopper and a second material falling hopper; the weighing hopper is rotationally connected to a frame; the weighing hopper meeting the weight requirement releases the measured material to the second material falling hopper, so that the total weight of the multiple groups of measured material is closer to the target weight; and the weighing hopper not meeting the weight requirement releases the measured material to the first material falling hopper; a first discharge port of the first material falling hopper is provided below with a material returning conveyor belt; the material returning conveyor belt returns the measured material discharged from the first material falling hopper to a lifting device, and re-conveyed by the lifting device to a feeding device, so that the measured material participates in the combined weighing again.

Description

Technical Field

[0001] This invention relates to the field of weighing devices, and more particularly to a combined scale with a device for rejecting unqualified weights. Background Technology

[0002] A combination scale is an electronic scale based on the principle of combined weighing. It detects the weight of the objects to be weighed in multiple weighing hoppers, performs combined calculations, selects the optimal combination whose combined weight is closest to the target weight, and releases the objects to be weighed from the weighing hopper of the optimal combination to complete the combined weighing.

[0003] If the maximum allowable difference between the combined weight and the target weight is reduced to improve the accuracy of the combined weight, the probability of the weighing hopper producing a failing weight will increase. This is the biggest obstacle preventing the combined scale from further improving the accuracy of the combined weight of the output product. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a combined scale with a defective weight rejection device to solve the problem that the combined weight accuracy of the output products of existing combined scales cannot be improved.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A combined scale with a failing weight rejection device includes a frame and a weighing mechanism, a feeding mechanism and a return mechanism disposed on the frame;

[0007] The weighing mechanism includes a feeding device, a buffer device, and a weighing device arranged sequentially from top to bottom. The buffer device includes multiple buffer hoppers arranged around the frame, and the weighing device includes multiple weighing hoppers arranged around the frame, with the weighing hoppers rotatably connected to the frame.

[0008] The material feeding mechanism includes a first feeding hopper and a second feeding hopper arranged coaxially, with the second feeding hopper located inside the first feeding hopper. The first feeding hopper has a first inlet and a first outlet, and the second feeding hopper has a second inlet and a second outlet. The weighing hopper swings relative to the frame so that the outlet end of the weighing hopper faces the first inlet or the second inlet.

[0009] The material return mechanism includes a material return conveyor belt and a lifting device. The lifting device has a lifting inlet and a lifting outlet. One end of the material return conveyor belt is located below the first outlet, and the other end of the material return conveyor belt passes through the lifting inlet. The lifting outlet is located above the material supply device.

[0010] In some optional embodiments, the feeding device includes a vibrating component disposed on the frame, a storage tray fixedly connected to the frame, and a plurality of feeding troughs arranged around the storage tray. One end of the feeding trough is movably connected to the storage tray, and the other end of the feeding trough faces the buffer hopper. The vibrating component is connected to the plurality of feeding troughs.

[0011] In some optional embodiments, there are multiple vibrating components, and each of the multiple vibrating components is connected to a multiple feeding trough in a one-to-one correspondence.

[0012] In some optional embodiments, the discharge end of the weighing hopper is provided with a first door and a second door arranged opposite to each other. The first door and the second door are both rotatably connected to the weighing hopper. The first door and the second door are arranged sequentially along the radially outer side to the radially inner side of the frame. The first door and the second door are arranged in a V-shape when closed. The weighing device also includes a door control component. The door control component drives the first door to open when the discharge end of the weighing hopper is facing the first feed inlet, and the door control component drives the second door to open when the discharge end of the weighing hopper is facing the second feed inlet.

[0013] In some optional embodiments, the door control assembly includes an elastic element, a first transmission rod disposed on the first door, a second transmission rod disposed on the second door, and a first stop and a second stop connected to the frame; the two ends of the elastic element are respectively connected to the first door and the second door, the first transmission rod is located on the side of the first door facing the frame, the second transmission rod is located on the side of the second door facing the frame, the first stop is located on the side of the first transmission rod, and the second stop is located on the side of the second transmission rod.

[0014] In some alternative embodiments, the weighing device further includes a drive cylinder, one end of which is connected to the frame and the other end of which is connected to the weighing hopper.

[0015] In some optional embodiments, the lifting device includes a housing and a lifting screw located within the housing. The lifting screw is rotatably connected to the housing. The housing has a lifting inlet and a lifting outlet at its two ends, respectively. The lifting screw extends to the lifting inlet and the lifting outlet at its two ends, respectively.

[0016] In some optional embodiments, a bagging mechanism is also included, with a product conveyor belt provided between the bagging mechanism and the weighing mechanism. One end of the product conveyor belt is located below the second discharge port, and the other end of the product conveyor belt is connected to the bagging mechanism.

[0017] In some optional embodiments, the gate control assembly includes a first drive motor and a second drive motor disposed on the weighing hopper, the main shaft of the first drive motor being connected to the first gate, and the main shaft of the second drive motor being connected to the second gate.

[0018] In some alternative embodiments, the discharge end of the buffer hopper is provided with a buffer gate that is rotatably connected to the buffer hopper.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The feeding mechanism includes a first feeding hopper and a second feeding hopper. The weighing hopper is rotatably connected to the frame. The weighing hopper that meets the weight requirements releases the weighed material into the second feeding hopper, making the total weight of multiple sets of weighed materials closer to the target weight. The weighing hopper that does not meet the weight requirements releases the weighed material into the first feeding hopper. A return conveyor belt is provided below the first discharge port of the first feeding hopper. The return conveyor belt returns the weighed material discharged from the first feeding hopper to the lifting device, and the lifting device re-transports it to the feeding device, so that the weighed material participates in the combined weighing again. Attached Figure Description

[0021] Figure 1 One of the schematic diagrams of the overall structure of the combined scale with a failing weight rejection device for the invention;

[0022] Figure 2 The second schematic diagram of the overall structure of the combined scale with the defective weight rejection device of the invention;

[0023] Figure 3 A schematic diagram of the first and second discharge hoppers of the combined scale with a defective weight rejection device for the invention.

[0024] Figure 4 A schematic diagram of the return mechanism of the combined scale with a defective weight rejection device for the invention;

[0025] Figure 5 A schematic diagram of the first door of the weighing hopper of the combined scale with a failing weight rejection device for the invention, in the open state.

[0026] Figure 6 A schematic diagram of the second door of the weighing hopper of the combined scale with a failing weight rejection device for the invention, in the open state.

[0027] In the picture:

[0028] 10. Frame; 11. First stop block; 12. Second stop block; 20. Feeding device; 21. Feeding trough; 30. Buffer hopper; 40. Weighing hopper; 41. First gate body; 411. First transmission rod; 42. Second gate body; 421. Second transmission rod; 50. First discharge funnel; 51. First feed inlet; 52. First discharge outlet; 60. Second discharge funnel; 61. Second feed inlet; 62. Second discharge outlet; 70. Return material mechanism; 71. Return material conveyor belt; 72. Lifting device. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1

[0033] Combination Figures 1 to 6 The diagram schematically illustrates a combined scale with a failing weight rejection device according to the present invention, including a frame 10 and a weighing mechanism, a feeding mechanism, and a return mechanism 70 disposed on the frame 10. This combined scale is applicable to candy packaging, grain packaging, etc.

[0034] The frame 10 has a rotating structure with its axis vertically aligned. The weighing mechanism includes a feeding device 20, a buffer device, and a weighing device arranged sequentially from top to bottom. The buffer device includes multiple buffer hoppers 30 arranged around the frame 10, and the weighing device includes multiple weighing hoppers 40 arranged around the frame 10, with the weighing hoppers 40 rotatably connected to the frame 10. The number of weighing hoppers 40 is consistent with the number of buffer hoppers 30.

[0035] The feeding device 20 feeds multiple buffer hoppers 30, ensuring that the weight of the measured material in each buffer hopper 30 is close to 1 / n of the target weight M, where n is less than the number of buffer hoppers 30. The buffer hoppers 30 serve as intermediate buffers. Each buffer hopper 30 has a buffer door rotatably connected to its discharge end. After all weighing hoppers 40 have released their measured materials, the buffer door of each buffer hopper 30 opens, releasing its contents into the weighing hoppers 40. The weighing hoppers 40 weigh their contents. Weighing sensors are installed at the connection between the weighing hoppers 40 and the frame 10. These sensors are electrically connected to the control unit of the combined scale. The control unit calculates and combines the weights detected by the multiple weighing hoppers 40 to select the n weighing hoppers 40 whose total weight is closest to the target weight M.

[0036] Combination Figure 3 As shown, the feeding mechanism includes a first feeding funnel 50 and a second feeding funnel 60 coaxially arranged, with the second feeding funnel 60 located inside the first feeding funnel 50. The first feeding funnel 50 has a first inlet 51 and a first outlet 52, and the second feeding funnel 60 has a second inlet 61 and a second outlet 62. The weighing hopper 40 swings relative to the frame 10 so that the discharge end of the weighing hopper 40 faces the first inlet 51 or the second inlet 61. The n weighing hoppers 40 whose total weight is closest to the target weight M release the measured material into the second feeding funnel 60 for further packaging and processing of the subsequent products. If the weight of the measured material in the remaining weighing hoppers 40 that have not yet released the measured material exceeds the preset weight range, it can be determined that no matter how the measured material in these weighing hoppers 40 is combined, it cannot meet the accuracy requirement of the target weight M. Therefore, the measured material in these weighing hoppers 40 should be refilled and weighed. Therefore, the weighing hoppers 40 that have not yet released the weighed material rotate relative to the frame 10 and release the weighed material into the first discharge hopper 50.

[0037] like Figure 4 The return material mechanism 70 includes a return material conveyor belt 71 and a lifting device 72. The lifting device 72 has a lifting inlet and a lifting outlet. One end of the return material conveyor belt 71 is located below the first discharge outlet 52, and the other end of the return material conveyor belt 71 passes through the lifting inlet. The lifting outlet is located above the feeding device 20. The return material conveyor belt 71 returns the measured material released from the first discharge outlet 52 of the first discharge funnel 50 to the lifting device 72. The lifting device 72 then re-transfers the measured material to the feeding device 20 so that the measured material can be re-involved in the combined weighing.

[0038] Specifically, the feeding device 20 includes a vibrating component mounted on the frame 10, a storage tray fixedly connected to the frame 10, and multiple feeding troughs 21 arranged around the storage tray. The vibrating component can be a vibrating motor. One end of the feeding trough 21 is movably connected to the storage tray, and the other end of the feeding trough 21 faces the buffer hopper 30. The vibrating component is connected to multiple feeding troughs 21. Preferably, there are multiple vibrating components, each connected to a corresponding feeding trough 21. The positions of the ends of the multiple feeding troughs 21 correspond one-to-one with the positions of the multiple buffer hoppers 30. When a buffer hopper 30 has finished releasing the measured material, the corresponding feeding trough 21, under the vibration of the vibrating component, moves the measured material from the storage tray to the buffer hopper 30, thus refilling the single buffer hopper 30.

[0039] The weighing hopper 40 has a first door 41 and a second door 42 arranged opposite to each other on its discharge end. Both doors 41 and 42 are rotatably connected to the weighing hopper 40. The first door 41 and second door 42 are arranged sequentially from the radially outer side to the radially inner side of the frame 10, and form a V-shape when closed. When the first door 41 is opened, it moves away from the second door 42; similarly, when the second door 42 is opened, it moves away from the first door 41. The weighing device also includes a door control assembly. This assembly drives the first door 41 to open when the discharge end of the weighing hopper 40 faces the first feed inlet 51, and drives the second door 42 to open when the discharge end of the weighing hopper 40 faces the second feed inlet 61, thereby guiding the object to be measured within the weighing hopper 40 to the first feed inlet 51 or the second feed inlet 61.

[0040] like Figure 5 and Figure 6 In this embodiment, the door control assembly includes an elastic element, a first transmission rod 411 disposed on the first door 41, a second transmission rod 421 disposed on the second door 42, and a first stop 11 and a second stop 12 connected to the frame 10. The elastic element is preferably a spring, with its two ends connected to the first door 41 and the second door 42 respectively. The elastic force of the elastic element causes the first door 41 and the second door 42 to tend to move in opposite directions. The first transmission rod 411 is located on the side of the first door 41 facing the frame 10, the second transmission rod 421 is located on the side of the second door 42 facing the frame 10, the first stop 11 is located on the side of the first transmission rod 411, and the second stop 12 is located on the side of the second transmission rod 421.

[0041] When the discharge end of the weighing hopper 40 moves toward the first feed inlet 51, the first transmission rod 411 moves toward the first stop block 11 and abuts against it. At this time, since the first stop block 11 is fixedly connected to the frame 10, under the action of the first stop block 11, the first transmission rod 411 drives the first door body 41 to rotate relative to the weighing hopper 40. The rotation of the first door body 41 overcomes the elastic force of the elastic element, causing the first door body 41 to open. When the discharge end of the weighing hopper 40 is located between the first feed inlet 51 and the second feed inlet 61, since the first door body 41 and the second door body 42 are only subjected to the elastic force of the elastic element, both the first door body 41 and the second door body 42 are in a closed state. When the discharge end of the weighing hopper 40 moves toward the second feed inlet 61, the second transmission rod 421 moves toward the second stop 12 and abuts against it. At this time, since the second stop 12 is fixedly connected to the frame 10, the second transmission rod 421 drives the second door 42 to rotate relative to the weighing hopper 40 under the action of the second stop 12. The second door 42 rotates and overcomes the elastic force of the elastic element, so that the second door 42 opens.

[0042] The weighing device also includes a drive cylinder, one end of which is connected to the frame 10 and the other end of which is connected to the weighing hopper 40. The drive cylinder extends or retracts to drive the weighing hopper 40 to rotate relative to the frame 10.

[0043] The lifting device 72 includes a housing and a lifting screw located inside the housing. The lifting screw is rotatably connected to the housing. The housing has a lifting inlet and a lifting outlet at both ends. The lifting screw extends to the lifting inlet and the lifting outlet at both ends. Rotating the lifting screw can drive the measured material inside the housing to move relative to the housing, so that the measured material moves from the lifting inlet to the lifting outlet.

[0044] The combined scale with a failing weight rejection device of the present invention also includes a bagging mechanism (not shown). A product conveyor belt is provided between the bagging mechanism and the weighing mechanism. One end of the product conveyor belt is located below the second discharge port 62, and the other end of the product conveyor belt is connected to the bagging mechanism. The measured material released from the second discharge port 62 moves to the bagging mechanism under the conveying of the product conveyor belt to realize the packaging process of the product.

[0045] Example 2

[0046] The difference between this embodiment and Embodiment 1 is that the gate control assembly includes a first drive motor and a second drive motor disposed on the weighing hopper 40. The main shaft of the first drive motor is connected to the first gate 41, and the main shaft of the second drive motor is connected to the second gate 42. That is, the first drive motor and the second drive motor independently drive the first gate 41 and the second gate 42, respectively, to achieve independent opening and closing of the first gate 41 and the second gate 42.

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0048] The feeding mechanism includes a first feeding hopper 50 and a second feeding hopper 60. The weighing hopper 40 is rotatably connected to the frame 10. The weighing hopper 40 that meets the weight requirements releases the weighed material to the second feeding hopper 60, making the total weight of multiple sets of weighed materials closer to the target weight. The weighing hopper 40 that does not meet the weight requirements releases the weighed material to the first feeding hopper 50. A return conveyor belt 71 is provided below the first discharge port 52 of the first feeding hopper 50. The return conveyor belt 71 returns the weighed material discharged from the first feeding hopper 50 to the lifting device 72, and the lifting device 72 re-transports it to the feeding device 20, so that the weighed material participates in the combined weighing again.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A combined scale with a device for rejecting substandard weights, characterized in that, It includes a frame and a weighing mechanism, a feeding mechanism and a return mechanism disposed on the frame; The weighing mechanism includes a feeding device, a buffer device, and a weighing device arranged sequentially from top to bottom. The buffer device includes multiple buffer hoppers arranged around the frame. The weighing device includes multiple weighing hoppers arranged around the frame, and the weighing hoppers are rotatably connected to the frame. A weighing sensor is also provided at the connection between the weighing hoppers and the frame. The weighing sensor is used to calculate and combine the weights of the multiple weighing hoppers. The material feeding mechanism includes a first feeding hopper and a second feeding hopper arranged coaxially, with the second feeding hopper located inside the first feeding hopper. The first feeding hopper has a first inlet and a first outlet, and the second feeding hopper has a second inlet and a second outlet. The weighing hopper swings relative to the frame so that the outlet end of the weighing hopper faces the first inlet or the second inlet. The weighing hopper has a first door and a second door arranged opposite to each other at the discharge end. The first door and the second door are rotatably connected to the weighing hopper. The first door and the second door are arranged sequentially from the radially outer side to the radially inner side of the frame. When closed, the first door and the second door are arranged in a V-shape. The weighing device also includes a door control component. The door control component drives the first door to open when the discharge end of the weighing hopper is facing the first feed inlet, and drives the second door to open when the discharge end of the weighing hopper is facing the second feed inlet. The door control assembly includes an elastic element, a first transmission rod disposed on the first door, a second transmission rod disposed on the second door, and a first stop and a second stop connected to the frame; the two ends of the elastic element are respectively connected to the first door and the second door, the first transmission rod is located on the side of the first door facing the frame, the second transmission rod is located on the side of the second door facing the frame, the first stop is located on the side of the first transmission rod, and the second stop is located on the side of the second transmission rod; The material return mechanism includes a material return conveyor belt and a lifting device. The lifting device has a lifting inlet and a lifting outlet. One end of the material return conveyor belt is located below the first outlet, and the other end of the material return conveyor belt passes through the lifting inlet. The lifting outlet is located above the material supply device.

2. The combined scale with a failing weight rejection device according to claim 1, characterized in that, The feeding device includes a vibrating component mounted on the frame, a storage tray fixedly connected to the frame, and a plurality of feeding troughs arranged around the storage tray. One end of each feeding trough is movably connected to the storage tray, and the other end of each feeding trough faces the buffer hopper. The vibrating component is connected to the plurality of feeding troughs.

3. The combined scale with a failing weight rejection device according to claim 2, characterized in that, The number of vibration components is provided in multiples, and the multiple vibration components are connected to the multiple feeding troughs in a one-to-one correspondence.

4. The combined scale with a failing weight rejection device according to claim 1, characterized in that, The weighing device also includes a drive cylinder, one end of which is connected to the frame and the other end of which is connected to the weighing hopper.

5. The combined scale with a failing weight rejection device according to claim 1, characterized in that, The lifting device includes a housing and a lifting screw located inside the housing. The lifting screw is rotatably connected to the housing. The housing has a lifting inlet and a lifting outlet at its two ends, respectively. The lifting screw extends to the lifting inlet and the lifting outlet at its two ends, respectively.

6. The combined scale with a failing weight rejection device according to claim 1, characterized in that, It also includes a bagging mechanism, and a product conveyor belt is provided between the bagging mechanism and the weighing mechanism. One end of the product conveyor belt is located below the second discharge port, and the other end of the product conveyor belt is connected to the bagging mechanism.

7. The combined scale with a failing weight rejection device according to claim 1, characterized in that, The gate control assembly includes a first drive motor and a second drive motor disposed on the weighing hopper, the main shaft of the first drive motor being connected to the first gate, and the main shaft of the second drive motor being connected to the second gate.

8. The combined scale with a failing weight rejection device according to claim 1, characterized in that, The discharge end of the buffer hopper is provided with a buffer gate that is rotatably connected to the buffer hopper.

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