Online weighing and proportioning metering device

Abstract

The invention relates to the technical field of conveying and metering, in particular to an online weighing, proportioning and metering device which comprises an outer cylinder, a weighing hopper, an air return pipe, a material suction pipe, a buffer box, a weighing unit, a material supply unit and a stirring unit. According to the invention, the following problems existing in the material conveying and metering process in the prior art can be solved: when falling into the metering and collecting box, materials are easy to impact a filter screen and pop out to the outside, so that loss exists; in the material weighing and metering process and the subsequent conveying process of a metering and collecting box, materials are likely to overflow from an opening in the top, weighing and metering of powder and liquid materials cannot be adapted, and limitation exists. Various materials are sequentially conveyed into the weighing hopper through negative pressure in the weighing hopper, it is ensured that solid particles, powder and liquid materials can completely enter the weighing hopper, cost increase caused by material leakage is prevented, then the materials in the weighing hopper are weighed and metered, and the various materials can be conveyed into the weighing hopper according to the weight proportion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conveying and metering technology, in particular to an online weighing and proportioning metering device. BACKGROUND

[0002] The online weighing and proportioning metering device is mainly used for continuously conveying materials and accurately measuring the flow, weight or volume in real time, and is widely used in production scenes that require dynamic control of material proportioning or delivery amount. The device integrates conveying and metering functions to ensure high-precision measurement of materials during continuous conveying.

[0003] The online weighing and proportioning metering device can convey solid particle materials, powder materials and liquid materials. When conveying and metering solid particles, the weight of the solid particles is measured in real time by a weighing sensor after they are conveyed into a metering cylinder, thereby realizing high-precision and automated conveying and metering of solid particles and facilitating the mixing of multiple materials according to weight proportioning.

[0004] In the conveying and metering of grain, such as corn, wheat and soybeans, the mixed granular food can be used to make animal feed, mixed grain food, etc. In the building materials industry, the mixed materials can be used to make concrete and hollow bricks. In the chemical industry, the mixed chemical raw materials can be used to make corresponding organic compound products.

[0005] With the development of science and technology, technicians in related fields have also made a lot of optimizations to conveying and metering devices. In order to make more accurate comparisons, a vitrified microsphere metering and conveying system is disclosed in Chinese Patent No. CN119822096A, which includes a storage bin, a discharge bin connected to the bottom of the storage bin, a receiving conveyor belt provided at the bottom of the discharge bin, a metering and collecting box placed on the receiving conveyor belt for receiving materials, a filter screen provided inside the metering and collecting box for screening materials, a weight sensor integrated at the bottom of the metering and collecting box, and the weight sensor installed at the four corners of the bottom of the metering and collecting box.

[0006] When the above-mentioned prior art weighs and measures materials, the materials fall downward from the storage bin into the metering and collecting box after being filtered by the filter screen, and the weight of the materials inside the metering and collecting box is obtained by weighing with the weight sensor and the metering and collecting box. When the weight sensor reaches the preset value, the receiving conveyor belt moves the metering and collecting box to the next station.

[0007] However, the above-mentioned prior art has some deficiencies in the process of conveying and metering materials: 1. Since the above-mentioned prior art requires the materials to fall downward from the storage bin into the metering and collecting box, the materials may bounce out of the metering and collecting box when they fall into the metering and collecting box due to impact with the filter screen, which may result in incomplete falling of the materials into the metering and collecting box and increase the cost.

[0008] 2. Since the metering and collecting box has an opening at the top, it is easy for the material to overflow from the opening at the top of the metering and collecting box during the weighing and metering of the material and the subsequent transportation process. As a result, the metering and collecting box can only weigh and measure solid particulate materials and cannot be adapted to powder and liquid materials, thus having limitations.

[0009] Therefore, based on the above-stated viewpoint, there is still room for improvement in the existing conveying and metering devices. Summary of the Invention

[0010] In order to solve the above problems, the present invention provides an online weighing and proportioning metering device, comprising an outer cylinder, a weighing bucket is arranged inside the outer cylinder through a support, a return air duct connected to the upper end of the weighing bucket is provided, the end of the return air duct away from the weighing bucket passes through the outer cylinder and is connected to an external vacuum pump, a suction pipe connected to the side wall of the weighing bucket is provided, the end of the suction pipe away from the weighing bucket passes through the outer cylinder and is connected to a cache box, a weighing unit for weighing and measuring materials is installed between the outer cylinder and the bottom of the weighing bucket, a feeding unit for conveying multiple materials to the weighing bucket according to proportion through the suction pipe is installed on the cache box, and a stirring unit for uniformly mixing multiple materials is installed inside the weighing bucket.

[0011] As a preferred technical solution of the present invention, the weighing unit includes a positioning cylinder installed on the inner bottom wall of the outer cylinder, and a mounting bucket is provided after the telescopic end of the top of the positioning cylinder passes upward through the weighing bucket. A weighing sensor is provided inside the mounting bucket, and a material receiving plate is installed on the upper end of the weighing sensor through a force plate. A controller is provided on the inner bottom wall of the outer cylinder, and the controller is electrically connected to the positioning cylinder and the weighing sensor.

[0012] As a preferred technical solution of the present invention, the lower end of the weighing hopper is provided with a plurality of annularly distributed through holes, and the top of the receiving plate is a conical structure, so that the upper end of the receiving plate gradually tilts downward from the middle to the edge; A lower hopper is installed at the lower end of the weighing hopper and is sleeved on the outside of the positioning cylinder. The lower hopper is connected to multiple through holes at the lower end of the weighing hopper. The end of the lower hopper away from the weighing hopper passes through the outer cylinder and extends outward, and the bottom of the lower hopper gradually tilts downward toward the side away from the weighing hopper.

[0013] As a preferred technical solution of the present invention, a fixing ring is installed on the inner wall of the weighing bucket, the outer diameter of the material receiving plate is smaller than the inner diameter of the fixing ring, the upper end of the fixing ring gradually tilts downward toward the side close to the material receiving plate, and a sealing baffle ring is installed on the outer wall of the material receiving plate, the sealing baffle ring is in contact with the bottom of the fixing ring, and the upper end of the sealing baffle ring gradually tilts downward toward the side away from the material receiving plate.

[0014] As a preferred technical scheme of the present application, the feeding unit comprises a plurality of feeding pipes connected with the buffer box, a plurality of push cylinders corresponding to the positions of the feeding pipes are mounted on the side wall of the buffer box, the push cylinders are electrically connected with the controller, and the telescopic end of the push cylinder is directed to the feeding pipe and is provided with a sealing plug for closing the feeding pipe.

[0015] As a preferred technical scheme of the present application, a plurality of through holes are equidistantly formed in the length direction of the upper end of the buffer box, a blocking net is arranged on the inner wall of the through hole, and a cover is mounted on the inner top wall of the buffer box through a connecting rod.

[0016] As a preferred technical scheme of the present application, the edge of the cover is provided with an upwardly inclined folded edge, there is a gap between the cover and the inner top wall of the buffer box for facilitating ventilation, and the height of the folded edge of the cover is higher than that of the feeding pipe.

[0017] As a preferred technical scheme of the present application, the stirring unit comprises a motor bracket mounted on the inner top wall of the weighing hopper, a drive motor is arranged on the motor bracket, a rotating shaft is arranged at the bottom of the output shaft of the drive motor, a support frame is mounted on the inner wall of the weighing hopper, the rotating shaft penetrates through the support frame, an execution frame for stirring and mixing the material is sleeved on the lower end of the rotating shaft, and the execution frame is located above the receiving plate.

[0018] As a preferred technical scheme of the present application, the execution frame is composed of a linkage ring, a connecting shaft and a material stirring frame, the linkage ring is sleeved on the lower end of the rotating shaft, a plurality of connecting shafts are arranged in a ring shape on the outer wall of the linkage ring, a plurality of material stirring frames are uniformly arranged in a ring shape on the outer wall of the connecting shaft, and the outer contour of the material stirring frame is equal to the inclination angle of the inclined surface on the upper end of the fixed ring and the receiving plate.

[0019] As a preferred technical scheme of the present application, a ring-shaped groove for accommodating a plurality of connecting shafts is formed in the inner wall of the weighing hopper, a rotating ring is rotatably mounted on the inner wall of the ring-shaped groove, one end of the connecting shaft away from the linkage ring penetrates through the rotating ring and extends into the ring-shaped groove, a gear is sleeved on the end of the connecting shaft away from the linkage ring, and a positioning gear ring engaged with the plurality of gears is mounted on the inner bottom wall of the ring-shaped groove.

[0020] In summary, the present application has the following beneficial technical effects: Firstly, the present application can ensure that the material is accumulated on the receiving plate and the upper end of the fixed ring by controlling the upward movement of the receiving plate and the abutting of the sealing ring and the bottom of the fixed ring, then the material on the upper end of the receiving plate is weighed by the weighing sensor, and the weight of the material is measured by the controller, so that the above steps can be repeated to transport a plurality of different materials into the weighing hopper for proportioning according to the weight proportion, thereby improving the weighing and measuring efficiency of the plurality of materials.

[0021] Secondly, the application can ensure that solid particles, powder and liquid material can completely enter the weighing hopper, prevent material from leaking out and increase cost, so that the multiple materials can be delivered to the weighing hopper according to the weight ratio, and the proportioning accuracy of the materials can be ensured.

[0022] Thirdly, the residual material weight in the suction pipe which is not delivered to the weighing hopper can be predicted and compensated to the actual weight by the weighing compensation of the weighing sensor, so that the weighing sensor obtains the predicted weight, when the predicted weight obtained by the weighing sensor meets the standard, the controller controls the push cylinder to drive the sealing plug to close the feeding pipe, so that the residual material in the suction pipe is continuously delivered to the weighing hopper for supplementing the actual weight, so that the final actual weight meets the standard, and the metering accuracy and the proportioning accuracy of the multiple materials are ensured.

[0023] Fourthly, the connecting shaft can drive the stirring frame to revolve around the sun while revolving around itself, so as to enhance the stirring and mixing intensity of the materials, the stirring frame with the same inclination angle as the receiving plate and the upper end of the fixed ring can scrape the materials remaining on the receiving plate and the upper end of the fixed ring and stir them with other materials, so as to further enhance the stirring effect and improve the mixing efficiency of the multiple materials. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Figure 1 is a structural schematic diagram of the application.

[0026] Figure 2 is a structural schematic diagram of the application.

[0027] Figure 3 is a partial enlarged view of A of the application. Figure 2

[0028] Figure 4 is a structural schematic diagram of the weighing hopper, the suction pipe and the feeding unit.

[0029] Figure 5 is a partial enlarged view of B of the application. Figure 4

[0030] Figure 6 is a structural schematic diagram of the buffer box.

[0031] Figure 7 is a structural schematic diagram of the weighing hopper and the stirring unit.

[0032] Figure 8 is a structural schematic diagram of the application. Figure 7 ​​A local enlarged view of C in FIG. 1.

[0033] In the figure, 1, outer cylinder; 2, weighing hopper; 21, through hole; 22, feeding hopper; 23, fixed ring; 3, return air pipe; 4, suction pipe; 5, buffer box; 51, through hole; 52, blocking net; 53, connecting rod; 54, cover; 6, weighing unit; 61, positioning cylinder; 62, mounting hopper; 63, weighing sensor; 64, force plate; 65, receiving plate; 651, sealing ring; 66, controller; 7, feeding unit; 71, feeding pipe; 72, pushing cylinder; 73, sealing plug; 8, stirring unit; 81, motor bracket; 82, driving motor; 83, rotating shaft; 84, support frame; 85, execution frame; 851, linkage ring; 852, connecting shaft; 853, stirring frame; 86, rotating ring; 87, gear; 88, positioning gear ring. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings Figures 1-8 The embodiments of the present application are described in detail.

[0035] The embodiments of the present application disclose an online weighing proportioning metering device. It needs to be explained that the online weighing proportioning metering device is mainly applied to the process of conveying and metering multiple materials and proportioning by weight. In terms of technical effect, the multiple materials can be conveyed into the weighing hopper 2 in sequence according to weight proportion, and the multiple materials are weighed and metered to ensure proportioning accuracy. Especially when the materials are conveyed into the weighing hopper 2, the weight of the materials remaining in the suction pipe 4 and not conveyed into the weighing hopper 2 can be predicted and compensated to the actual weight to obtain a predicted weight. When the predicted weight meets the standard, the materials remaining in the suction pipe 4 are continuously conveyed into the weighing hopper 2, so that the actual weight meets the standard, and the proportioning accuracy of the materials is further ensured. Further, the online weighing proportioning metering device can also stir and mix the multiple materials after the weighing and metering are completed, so as to facilitate subsequent processing.

[0036] Referring to Figure 1 As shown in the figure, an online weighing proportioning metering device includes an outer cylinder 1. The inner part of the outer cylinder 1 is provided with a weighing hopper 2 through a support column. The lower end of the weighing hopper 2 is a certain distance from the inner bottom wall of the outer cylinder 1. The upper end of the weighing hopper 2 is provided with a return air pipe 3 connected thereto. The end of the return air pipe 3 away from the weighing hopper 2 is connected with an external vacuum pump after penetrating through the outer cylinder 1. The side wall of the weighing hopper 2 is provided with a suction pipe 4 connected thereto. The end of the suction pipe 4 away from the weighing hopper 2 is connected with a buffer box 5 after penetrating through the outer cylinder 1. The bottom part between the outer cylinder 1 and the weighing hopper 2 is installed with a weighing unit 6 for weighing and metering the materials. The buffer box 5 is installed with a feeding unit 7 for conveying the multiple materials into the weighing hopper 2 according to the proportion through the suction pipe 4. The inner part of the weighing hopper 2 is installed with a stirring unit 8 for uniformly mixing the multiple materials.

[0037] In the specific implementation process, first, the air in the weighing hopper 2 is pumped out by an external vacuum pump, so that a negative pressure is generated in the weighing hopper 2, second, the material is fed into the feeding unit 7, and the weighing hopper 2 with the negative pressure sucks the multiple materials into the inside of the weighing hopper 2 through the suction pipe 4 to sequentially weigh and measure; then, the multiple materials are uniformly stirred through the stirring unit 8, and finally, the stirred material is discharged from the weighing hopper 2, so as to facilitate subsequent processing of the mixed material; in addition, the present application can adapt to the weighing and stirring of solid particles, powders and liquid materials, thereby improving the adaptability range of the present application.

[0038] Referring to Figure 2 As shown in the figure, since the multiple materials need to be proportioned by weight before mixing, the multiple materials need to be weighed and measured sequentially when being discharged into the weighing hopper 2, based on this, in the present embodiment, the weighing unit 6 includes a positioning cylinder 61 installed on the inner bottom wall of the outer cylinder 1, the telescopic end of the top of the positioning cylinder 61 passes through the weighing hopper 2 upwardly and is provided with a mounting hopper 62, the inside of the mounting hopper 62 is provided with a weighing sensor 63, the upper end of the weighing sensor 63 is installed with a material receiving plate 65 through a force receiving plate 64, the inner bottom wall of the outer cylinder 1 is provided with a controller 66, and the controller 66 is electrically connected between the positioning cylinder 61 and the weighing sensor 63.

[0039] It should be noted that the weighing sensor 63 is a prior art for converting a mass signal into a measurable electrical signal output, when the material is placed on the material receiving plate 65, the material receiving plate 65 exerts a downward pressure on the weighing sensor 63 under the gravity of the material, so that the weighing sensor 63 can convert the received pressure into a mass signal, thereby realizing the weighing of the material; in addition, the controller 66 is a PLC controller in the prior art, mainly used for controlling the start and stop of the positioning cylinder 61, and receiving the measurable electrical signal output by the weighing sensor 63, thereby facilitating the metering of the material.

[0040] Referring to Figure 2 and Figure 3 As shown in the figure, in order to quickly discharge the material after the weighing and measurement from the weighing hopper 2, in the present embodiment, a plurality of annularly distributed through holes 21 are formed in the lower end of the weighing hopper 2, the top of the material receiving plate 65 is a conical structure, so that the upper end of the material receiving plate 65 gradually slopes downward from the middle to the edge; the lower end of the weighing hopper 2 is installed with a lower discharge hopper 22 which is sleeved outside the positioning cylinder 61, the lower discharge hopper 22 is in communication with the plurality of through holes 21 in the lower end of the weighing hopper 2, the end of the lower discharge hopper 22 away from the weighing hopper 2 extends outwardly after passing through the outer cylinder 1, and the bottom of the lower discharge hopper 22 gradually slopes downward to the side away from the weighing hopper 2.

[0041] Further, in order to avoid the gap between the receiving plate 65 and the weighing hopper 2 causing the material to seep down and affect the weighing measurement progress, in the embodiment, a fixed ring 23 is installed on the inner wall of the weighing hopper 2, the outer diameter of the receiving plate 65 is smaller than the inner diameter of the fixed ring 23, the upper end of the fixed ring 23 gradually inclines downward towards the side close to the receiving plate 65, facilitating the material on the upper end of the fixed ring 23 to roll down, and a sealing baffle ring 651 is installed on the outer wall of the receiving plate 65, the sealing baffle ring 651 abuts against the bottom of the fixed ring 23, and the upper end of the sealing baffle ring 651 gradually inclines downward away from the receiving plate 65, so as to facilitate the material remaining on the upper end of the sealing baffle ring 651 to roll down.

[0042] In the specific implementation process, before the material is discharged into the weighing hopper 2, the controller 66 makes the positioning cylinder 61 start to work, the positioning cylinder 61 drives the receiving plate 65 to move upward, so that the receiving plate 65 drives the sealing baffle ring 651 to abut against the bottom of the fixed ring 23, thereby compensating the gap between the receiving plate 65 and the fixed ring 23, ensuring that the material can be stacked on the receiving plate 65 and the upper end of the fixed ring 23, and the material on the upper end of the fixed ring 23 is pressed towards the side close to the receiving plate 65 under the action of gravity, so that the weight of the material is applied to the receiving plate 65; then the controller 66 makes the weighing sensor 63 start to work, and then the material is transported into the weighing hopper 2 through the suction pipe 4, the material on the upper end of the receiving plate 65 is weighed by the weighing sensor 63, and the weight is converted into a signal and transmitted to the controller 66, so that the controller 66 measures the weight of the material; after the weight of the material meets the standard and the mixing is completed, the controller 66 makes the external vacuum pump pause to suck air, and the material transportation work of the suction pipe 4 is stopped, so that the above steps can be repeated to transport multiple different materials into the weighing hopper 2 according to the weight ratio for proportioning, facilitating subsequent processing, and improving the weighing measurement efficiency of multiple materials.

[0043] After the material weighing measurement is completed, the controller 66 controls the positioning cylinder 61 to drive the receiving plate 65 to move downward, the receiving plate 65 drives the sealing baffle ring 651 to move downward to form an annular gap between the sealing baffle ring 651 and the fixed ring 23, so that the material on the upper end of the receiving plate 65 rolls down through the annular gap and then discharges through the through hole 21 and the lower hopper 22 in turn.

[0044] Reference Figure 4As shown, since the material needs to be stirred by multiple different materials to form, multiple materials need to be transported into the weighing hopper 2 in turn through the suction pipe 4, based on this, the feeding unit 7 is also provided in the embodiment, specifically, the feeding unit 7 includes multiple feeding pipes 71 connected with the buffer box 5, and the multiple feeding pipes 71 are respectively used for transporting different materials into the buffer box 5, for example, when the grain is weighed and measured and stirred and mixed, the multiple feeding pipes 71 can respectively transport rice, soybeans, corn and peanuts into the buffer box 5; multiple push cylinders 72 corresponding in position to the feeding pipes 71 are installed on the side wall of the buffer box 5, the push cylinders 72 are electrically connected with the controller 66, and the telescopic end of the push cylinder 72 is directed to the feeding pipe 71 and is provided with a sealing plug 73 used for closing the feeding pipe 71.

[0045] In the specific implementation process, when the material needs to be transported into the weighing hopper 2, the negative pressure is formed in the weighing hopper 2 through the external vacuum pump, during which the controller 66 makes the push cylinder 72 connected to the power to start, so that one of the push cylinders 72 drives the sealing plug 73 to pull out from the feeding pipe 71, so that the negative pressure in the suction pipe 4 and the buffer box 5 sucks the material from the feeding pipe 71 and transports it into the weighing hopper 2, during which the material is weighed and measured by the weighing sensor 63, and after the weight of the material meets the standard, the controller 66 makes the push cylinder 72 drive the sealing plug 73 to recover the closure of the feeding pipe 71, and the controller 66 makes the next push cylinder 72 drive the sealing plug 73 to pull out from the feeding pipe 71, so as to transport the next material into the weighing hopper 2 according to the weight proportion; the above steps are repeated to transport multiple materials into the weighing hopper 2 in turn according to the weight proportion, and the weighing measurement can ensure the proportioning accuracy of the material.

[0046] It should be noted that the negative pressure transportation is a common form of pneumatic conveying, and the material is moved by the negative pressure airflow in the suction pipe 4, so that the negative pressure matched with the suction pipe 4 can be adapted to solid particles, powders and liquid materials, thereby improving the adaptability range of the present application.

[0047] When the negative pressure generated in the weighing hopper 2 sucks the material in the material suction pipe 4, the weighing sensor 63 weighs the material in the weighing hopper 2 in real time, and the weighing compensation of the weighing sensor 63 can be set through the controller 66. Since the material weight obtained by the weighing sensor 63 is the weight of the material in the weighing hopper 2, and the material in the material suction pipe 4 that is not delivered to the weighing hopper 2 also needs to be delivered to the weighing hopper 2, the residual material weight in the material suction pipe 4 that is not delivered to the weighing hopper 2 can be predicted and compensated to the actual weight through the weighing compensation, so that the weighing sensor 63 can obtain the predicted weight. When the predicted weight obtained by the weighing sensor 63 meets the standard, the controller 66 controls the push cylinder 72 to drive the sealing plug 73 to close the material supply pipe 71, so that the residual material in the material suction pipe 4 continues to be delivered to the weighing hopper 2 to supplement the actual weight, so that the final actual weight meets the standard, thereby ensuring the metering accuracy and the matching accuracy of multiple materials.

[0048] Referring to Figure 5 and Figure 6 Since the material suction pipe 4 needs to deliver the material under the action of the negative pressure inside the weighing hopper 2, and the end of the material suction pipe 4 away from the weighing hopper 2 is connected with the buffer box 5, the material suction pipe 4 and the buffer box 5 are easy to contract under the action of the negative pressure, which easily affects the delivery flow of the material. Therefore, the vent hole capable of avoiding the above problems needs to be provided on the buffer box 5. Specifically, in the embodiment, a plurality of through holes 51 are provided on the upper end of the buffer box 5 along the length direction at equal intervals, and a blocking net 52 is arranged on the inner wall of the through hole 51. The blocking net 52 is used to prevent external impurities from entering the buffer box 5 through the through hole 51. The cover 54 is installed on the inner top wall of the buffer box 5 through the connecting rod 53.

[0049] Further, in the embodiment, the edge of the cover 54 has an upwardly inclined folded edge, and the cover 54 and the inner top wall of the buffer box 5 have a gap for easy ventilation. The height of the folded edge of the cover 54 is higher than the height of the material supply pipe 71. Through the cover 54, not only can the material discharged from the material supply pipe 71 avoid easily blocking the through hole 51, but also the through hole 51 can always intake air.

[0050] In the specific implementation process, when all the material supply pipes 71 are closed, the residual material in the material suction pipe 4 still needs to be delivered to the weighing hopper 2 under the action of the negative pressure. At this time, the material suction pipe 4 and the buffer box 5 can intake air under the action of the negative pressure (shown in Figure 6 ), so as to ensure that the air pressure in the material suction pipe 4 and the buffer box 5 is normal, and avoid that the material suction pipe 4 and the buffer box 5 contract under the action of the negative pressure, so that the residual material cannot be smoothly sent into the weighing hopper 2, thereby ensuring the rationality.

[0051] Referring to Figure 7 and Figure 8As shown, since a variety of materials need to be discharged after being stirred and mixed after being fed into the weighing bucket 2 for the next process, a corresponding stirring unit 8 is also provided in this embodiment. Specifically, the stirring unit 8 includes a motor frame 81 installed on the top wall of the weighing bucket 2, and a driving motor 82 is provided on the motor frame 81. A rotating shaft 83 is provided at the bottom of the output shaft of the driving motor 82. A support frame 84 is installed on the inner wall of the weighing bucket 2, and the rotating shaft 83 rotates through the support frame 84. The support frame 84 can ensure the stability of the rotating shaft 83 during rotation, and avoid the lack of support at the end of the rotating shaft 83 away from the driving motor 82 to affect its rotation stability. The lower end of the rotating shaft 83 is provided with an execution frame 85 for stirring and mixing the materials, and the execution frame 85 is located above the material receiving plate 65.

[0052] Furthermore, in this embodiment, the execution frame 85 is composed of a linkage ring 851, a connecting shaft 852 and a material shifting frame 853, wherein the linkage ring 851 is fixedly sleeved on the lower end of the rotating shaft 83, and a plurality of annularly distributed connecting shafts 852 are rotatably installed on the outer wall of the linkage ring 851, and a plurality of annularly distributed material shifting frames 853 are evenly installed on the outer wall of the connecting shaft 852, and the outer contour of the material shifting frame 853 is equal to the inclination angle of the inclined surface of the receiving plate 65 and the upper end of the fixed ring 23.

[0053] Furthermore, in this embodiment, an annular groove for accommodating multiple connecting shafts 852 is opened on the inner wall of the weighing bucket 2, and a rotating ring 86 is rotatably installed on the inner wall of the annular groove. The end of the connecting shaft 852 away from the linkage ring 851 rotates through the rotating ring 86 and extends to the inside of the annular groove, and the end of the connecting shaft 852 away from the linkage ring 851 is fixedly sleeved with a gear 87, and the bottom wall of the annular groove is installed with a positioning gear ring 88 that meshes with the multiple gears 87.

[0054] During the specific implementation process, after the weighing of the material at the upper end of the receiving plate 65 is completed, the drive motor 82 is started, and the drive motor 82 drives the rotating shaft 83 to rotate. The rotating shaft 83 drives multiple connecting shafts 852 and the material diverter rack 853 to perform circumferential motion through the linkage ring 851 and stir and mix the materials in the symmetrical weighing bucket 2; during this period, the connecting shaft 852 rotates under the action of the gear 87 and the positioning gear ring 88, so that the connecting shaft 852 can drive the material diverter rack 853 to rotate while revolving along the rotating shaft 83, so as to enhance the stirring and mixing intensity of the materials; in addition, the material diverter rack 853, which has an inclination angle equal to that of the receiving plate 65 and the upper end of the fixing ring 23, can scrape up the materials remaining on the upper end of the receiving plate 65 and the fixing ring 23 and stir them with other materials, further enhancing the stirring effect, thereby improving the mixing efficiency of multiple materials.

[0055] Working time: the first step: first through the controller 66 make positioning cylinder 61 power on, positioning cylinder 61 driven material receiving plate 65 up, so that the material receiving plate 65 driven sealing baffle ring 651 with fixed ring 23 bottom abuts, so as to compensate the gap between the material receiving plate 65 and the fixed ring 23, the material on the upper end of the fixed ring 23 is pressed to the side close to the material receiving plate 65 under the action of gravity, so that the weight of the material into the weighing hopper 2 is applied to the material receiving plate 65, and then the weighing sensor 63 is started through the controller 66.

[0056] The second step: the air in the weighing hopper 2 is extracted by the external vacuum pump, so that the negative pressure is generated in the weighing hopper 2, during which the controller 66 makes the push cylinder 72 power on, so that one of the push cylinders 72 drives the sealing plug 73 to pull out from the feeding pipe 71, so that the negative pressure in the suction pipe 4 and the buffer tank 5 sucks the material from the feeding pipe 71 and transports it into the weighing hopper 2, during which the material is weighed by the weighing sensor 63 cooperating with the controller 66, and after the weight of the material meets the standard, the controller 66 makes the push cylinder 72 drive the sealing plug 73 to restore the sealing of the feeding pipe 71, and the controller 66 makes the next push cylinder 72 drive the sealing plug 73 to pull out from the feeding pipe 71, so as to transport the next kind of material into the weighing hopper 2 according to the weight proportion; in this way, the multiple push cylinders 72 can open the feeding pipe 71 in turn to transport multiple materials into the weighing hopper 2 according to the weight proportion, and the weighing can ensure the accuracy of the proportion of the materials.

[0057] The third step: when the negative pressure generated in the weighing hopper 2 sucks the material in the suction pipe 4, the weighing sensor 63 weighs the weight of the material in the weighing hopper 2 in real time, and the weighing compensation of the weighing sensor 63 can be set through the controller 66. Since the weight of the material obtained by the weighing sensor 63 is the weight of the material in the weighing hopper 2, the material in the suction pipe 4 that has not been transported into the weighing hopper 2 also needs to be transported into the weighing hopper 2, so that the weight of the material remaining in the suction pipe 4 that has not been transported into the weighing hopper 2 can be predicted and compensated to the actual weight through the weighing compensation, so that the weighing sensor 63 can obtain the predicted weight, and when the predicted weight obtained by the weighing sensor 63 meets the standard, the controller 66 controls the push cylinder 72 to drive the sealing plug 73 to seal the feeding pipe 71, so that the material remaining in the suction pipe 4 continues to be transported into the weighing hopper 2 for supplementing the actual weight, so that the final actual weight meets the standard, thereby ensuring the measurement accuracy and the proportioning accuracy of multiple materials.

[0058] Fourth step: when all the supply pipes 71 are closed, the residual material in the suction pipe 4 still needs to be transported to the weighing hopper 2 under the action of negative pressure, at this time the suction pipe 4 and the buffer tank 5 can inhale under the action of negative pressure under the action of the through hole 51, ensure that the air pressure in the suction pipe 4 and the buffer tank 5 is normal, avoid the suction pipe 4 and the buffer tank 5 shrink under the action of negative pressure and cause the residual material to be unable to smoothly enter the weighing hopper 2.

[0059] Fifth step: after the weighing of the material on the upper end of the receiving plate 65 is completed, the driving motor 82 is started, the driving motor 82 drives the rotating shaft 83 to rotate, the rotating shaft 83 drives a plurality of connecting shafts 852 and the material stirring frame 853 to move in a circumferential direction through the linkage ring 851, the connecting shaft 852 rotates under the action of the gear 87 and the positioning ring gear 88, so that the connecting shaft 852 can drive the material stirring frame 853 to rotate around the rotating shaft 83 while rotating and stirring and mixing the material on the upper end of the receiving plate 65, so as to enhance the stirring and mixing intensity of the material.

[0060] Sixth step: when the weight of the material meets the standard and the mixing is completed, the controller 66 makes the external vacuum pump pause pumping, and closes the delivery material operation of the suction pipe 4; after the material weighing and metering is completed, the controller 66 controls the positioning cylinder 61 to drive the receiving plate 65 to move downward, the receiving plate 65 drives the sealing baffle ring 651 to move downward to form an annular gap with the fixed ring 23, so that the material on the upper end of the receiving plate 65 falls downward through the annular gap, and then falls out through the through hole 21 and the lower hopper 22.

[0061] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

[0062] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An online weighing and proportioning metering device, comprising an outer cylinder (1), a weighing bucket (2) is provided inside the outer cylinder (1) through a support, a return air duct (3) is provided at the upper end of the weighing bucket (2) and is connected to the outer cylinder (1), an end of the return air duct (3) away from the weighing bucket (2) passes through the outer cylinder (1) and is connected to an external vacuum pump, a suction pipe (4) is provided on the side wall of the weighing bucket (2) and is connected to the outer cylinder (1), an end of the suction pipe (4) away from the weighing bucket (2) passes through the outer cylinder (1) and is connected to a buffer box (5), characterized in that: A weighing unit (6) for weighing and measuring materials is installed between the outer cylinder (1) and the bottom of the weighing hopper (2); a feeding unit (7) for conveying a plurality of materials into the weighing hopper (2) according to a proportion through a suction pipe (4) is installed on the buffer box (5); and a stirring unit (8) for uniformly mixing the plurality of materials is installed inside the weighing hopper (2).

2. An online weighing and proportioning device according to claim 1, characterized in that: The weighing unit (6) includes a positioning cylinder (61) installed on the inner bottom wall of the outer cylinder (1), a telescopic end of the top of the positioning cylinder (61) passes upward through the weighing bucket (2) and is provided with a mounting bucket (62), a weighing sensor (63) is provided inside the mounting bucket (62), a material receiving plate (65) is installed on the upper end of the weighing sensor (63) through a force plate (64), a controller (66) is provided on the inner bottom wall of the outer cylinder (1), and the controller (66) is electrically connected to the positioning cylinder (61) and the weighing sensor (63).

3. An online weighing and proportioning device according to claim 2, characterized in that: The lower end of the weighing bucket (2) is provided with a plurality of annularly distributed through holes (21), and the top of the receiving plate (65) is a conical structure, so that the upper end of the receiving plate (65) gradually tilts downward from the middle to the edge; A lower hopper (22) is installed at the lower end of the weighing hopper (2) and is sleeved on the outside of the positioning cylinder (61). The lower hopper (22) is connected to multiple through holes (21) at the lower end of the weighing hopper (2). The end of the lower hopper (22) away from the weighing hopper (2) passes through the outer cylinder (1) and extends outward, and the bottom of the lower hopper (22) gradually tilts downward toward the side away from the weighing hopper (2).

4. The online weighing and proportioning device according to claim 2, characterized in that: A fixing ring (23) is installed on the inner wall of the weighing hopper (2), the outer diameter of the receiving plate (65) is smaller than the inner diameter of the fixing ring (23), the upper end of the fixing ring (23) gradually tilts downward toward the side close to the receiving plate (65), and a sealing retaining ring (651) is installed on the outer wall of the receiving plate (65), the sealing retaining ring (651) abuts against the bottom of the fixing ring (23), and the upper end of the sealing retaining ring (651) gradually tilts downward toward the side away from the receiving plate (65).

5. The online weighing and proportioning device according to claim 2, characterized in that: The feeding unit (7) includes a plurality of feeding pipes (71) connected to the buffer box (5), and a plurality of pushing cylinders (72) corresponding to the positions of the feeding pipes (71) are installed on the side wall of the buffer box (5). The pushing cylinders (72) are electrically connected to the controller (66), and the telescopic end of the pushing cylinder (72) points to the feeding pipe (71) and is installed with a sealing plug (73) for sealing the feeding pipe (71).

6. The online weighing and proportioning device according to claim 1, characterized in that: The upper end of the cache box (5) is provided with a plurality of through holes (51) at equal intervals along the length direction, the inner walls of the through holes (51) are provided with a blocking net (52), and the inner top wall of the cache box (5) is provided with a shielding cap (54) via a connecting rod (53).

7. The online weighing and proportioning device according to claim 6, characterized in that: The edge of the shield cap (54) has an upwardly inclined folded edge, and a gap for ventilation is provided between the shield cap (54) and the inner top wall of the cache box (5), and the folded edge of the shield cap (54) is higher than the height of the feed pipe (71).

8. The online weighing and proportioning device according to claim 1, characterized in that: The stirring unit (8) includes a motor frame (81) mounted on the top wall of the weighing hopper (2), a driving motor (82) is provided on the motor frame (81), a rotating shaft (83) is provided at the bottom of the output shaft of the driving motor (82), a supporting frame (84) is mounted on the inner wall of the weighing hopper (2), the rotating shaft (83) rotates through the supporting frame (84), and an execution frame (85) for stirring and mixing materials is sleeved on the lower end of the rotating shaft (83), and the execution frame (85) is located above the material receiving plate (65).

9. The online weighing and proportioning device according to claim 8, characterized in that: The execution frame (85) is composed of a linkage ring (851), a connecting shaft (852) and a material shifting frame (853), wherein the linkage ring (851) is sleeved on the lower end of the rotating shaft (83), a plurality of annularly distributed connecting shafts (852) are rotatably mounted on the outer wall of the linkage ring (851), and a plurality of annularly distributed material shifting frames (853) are evenly mounted on the outer wall of the connecting shaft (852), and the outer contour of the material shifting frame (853) is equal to the inclination angle of the inclined surface of the receiving plate (65) and the upper end of the fixed ring (23).

10. The online weighing and proportioning device according to claim 9, characterized in that: The inner wall of the weighing bucket (2) is provided with an annular groove for accommodating a plurality of connecting shafts (852), and a rotating ring (86) is rotatably mounted on the inner wall of the annular groove. The end of the connecting shaft (852) away from the linkage ring (851) rotates through the rotating ring (86) and then extends into the inner part of the annular groove, and the end of the connecting shaft (852) away from the linkage ring (851) is sleeved with a gear (87), and a positioning gear ring (88) meshing with the plurality of gears (87) is mounted on the bottom wall of the annular groove.

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