Quantitative feeding production line

Abstract

The utility model relates to a quantitative feeding production line, which belongs to the technical field of rare earth processing technology and equipment, and comprises a plurality of negative pressure feeding, weighing and feeding all-in-one machines, the upper part of a stock bin of each negative pressure feeding, weighing and feeding all-in-one machine is provided with a feed port and a negative pressure interface, and the bottom of the stock bin is provided with a discharge port; the vacuumizing system comprises a first vacuum pump and a vacuum pipeline, and a negative pressure connector of each negative pressure feeding, weighing and feeding all-in-one machine is in butt joint with an air inlet of the first vacuum pump through the vacuum pipeline; and a discharge port of the stock bin of each negative-pressure feeding, weighing and feeding all-in-one machine is in butt joint with one discharging articulated chute, and a port of the bottom end of each discharging articulated chute is located above the liquid level of one electrolytic furnace.

Description

Technical Field

[0001] The utility model belongs to the technical field of rare earth processing technology and equipment, and particularly relates to a quantitative feeding production line. Background Art

[0002] When electrolyzing rare earth raw materials in the rare earth electrolysis industry, it is necessary to continuously, evenly and accurately add the raw materials into the electrolysis furnace. Due to the generally low degree of automation in the electrolysis industry, manual feeding method, volume feeding method, vacuum feeder + buffer bin + screw loss-in-weight weigher feeding method are often used.

[0003] These feeding methods have low automation, and especially cannot weigh the materials while collecting rare earth raw materials and feeding, and accurately quantitatively feed the materials downstream. Summary of the Utility Model

[0004] Aiming at the above problems, the purpose of the utility model is to provide a quantitative feeding production line, which is used to solve the problems that the existing rare earth raw material feeding equipment cannot weigh the materials while collecting rare earth raw materials and feeding, and accurately quantitatively feed the materials downstream.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a quantitative feeding production line, including

[0007] A plurality of negative pressure feeding and weighing feed integrators, each of the negative pressure feeding and weighing feed integrators includes a feed bin, a housing and at least one weighing sensor. The feed bin is arranged in the housing with an annular space left between them, and the feed bin is arranged on the housing through the weighing sensor; the upper part of the feed bin of each negative pressure feeding and weighing feed integrator is provided with a feed inlet and a negative pressure interface, and the bottom is provided with a discharge outlet, and the feed inlet, the negative pressure interface and the discharge outlet are all communicated with the inside of the feed bin;

[0008] A set of vacuum pumping system, including a first vacuum pump and a vacuum pipeline. The negative pressure interfaces of each negative pressure feeding and weighing feed integrator are respectively docked with the air inlet of the first vacuum pump through the vacuum pipeline;

[0009] A plurality of electrolysis furnaces, the discharge outlets of the feed bins of each negative pressure feeding and weighing feed integrator are respectively docked with a feeding chute, and the bottom end port of each feeding chute is located above the liquid level of an electrolysis furnace.

[0010] Further, it also includes a mixing buffer bin with a funnel-shaped lower part. The feed inlets of the bins of each of the negative-pressure feeding, weighing and feeding integrated machines are respectively connected to the bottom end of the mixing buffer bin through material pipelines. A feeder is arranged at the funnel bottom end of the mixing buffer bin, and the feed inlets of the bins of each of the negative-pressure feeding, weighing and feeding integrated machines are respectively connected to the discharge outlet of the feeder through material pipelines.

[0011] Further, a knife gate valve is arranged at the bottom of the mixing buffer bin above the feeder.

[0012] Further, a switching valve is arranged on each of the feeding chutes.

[0013] Further, it also includes a feeding station, a raw material pipeline, a vacuum feeder, a second vacuum pump and a negative-pressure pipeline. A raw material inlet is arranged on the upper side of the mixing buffer bin. The raw material inlet of the mixing buffer bin is connected to the discharge outlet of the feeding station through the raw material pipeline. A negative-pressure port is arranged at the bottom of the vacuum feeder. The vacuum feeder is arranged on the mixing buffer bin, and the negative-pressure port of the vacuum feeder is located above the mixing buffer bin and is connected to the inside of the mixing buffer bin. The air inlet of the second vacuum pump is connected to the negative-pressure port of the vacuum feeder through the negative-pressure pipeline.

[0014] Further, the material pipeline includes a main material pipeline and several material branch pipelines. Each of the negative-pressure feeding, weighing and feeding integrated machines is configured with a material branch pipeline. The feeding ends of the material branch pipelines are respectively butted with the main material pipeline through material three-way valves, and the discharging ends of the material branch pipelines are respectively butted with the feed inlets of the bins of the corresponding negative-pressure feeding, weighing and feeding integrated machines.

[0015] Further, the vacuum pipeline includes a main vacuum pipeline and several vacuum branch pipelines. Each of the negative-pressure feeding, weighing and feeding integrated machines is configured with a vacuum branch pipeline. The air inlet ends of the vacuum branch pipelines are respectively butted with the negative-pressure interfaces of the bins of the corresponding negative-pressure feeding, weighing and feeding integrated machines. The air outlet ends of the vacuum branch pipelines are connected to the main vacuum pipeline through vacuum three-way valves, and the air inlet end of the main vacuum pipeline is butted with the air inlet of the first vacuum pump.

[0016] Further, upper fixing members and lower fixing members are respectively arranged at two ends of each weighing sensor of the negative-pressure feeding and weighing feeder integrated machine. The upper fixing member of the weighing sensor is fixed on the housing, and the lower fixing member of the weighing sensor is fixed on the silo. Wherein, when the number of weighing sensors is one, the single weighing sensor is fixed on the inner wall of the housing, and the silo is arranged on the single weighing sensor in a single-point pressing or pulling manner; when the number of weighing sensors is three, the three weighing sensors are evenly spaced in the annular space between the silo and the housing, and two ends of each weighing sensor are respectively fixedly connected to the silo and the housing; when the number of weighing sensors is four, the four weighing sensors are evenly spaced in the annular space between the silo and the housing, and two ends of each weighing sensor are respectively fixedly connected to the silo and the housing.

[0017] Further, the negative-pressure feeding and weighing feeder integrated machine further includes a dust filter and a filter backblowing and dust cleaning device. The discharge end of the material branch pipe is communicated with the feed inlet of the silo of the corresponding negative-pressure feeding and weighing feeder integrated machine through the dust filter. The filter backblowing and dust cleaning device includes an air storage tank, a plurality of pulse valves and a plurality of blowing pipes. Compressed air is prestored in the air storage tank, and a pulse valve is arranged between the air storage tank and each blowing pipe. The air storage tank is arranged on the side wall at the top of the silo, and the blowing pipes are arranged inside the top of the silo. The dust filter is provided with air extraction holes. The blowing pipe includes a main pipe and a plurality of branch pipes. The plurality of branch pipes are respectively connected to the main pipe. Air outlet holes are distributed on the main pipe and the branch pipes. The air outlet holes of the blowing pipe are respectively opposite to the air extraction holes of the dust filter.

[0018] Further, the negative-pressure feeding and weighing feeder integrated machine further includes a disk feeder. The disk feeder includes a receiving tray, a feeding mechanism and a discharge pipe. The discharge pipe is communicated with the receiving tray through the feeding mechanism. The receiving tray is located below the discharge outlet of the silo. The feeding mechanism is arranged on the receiving tray, and the feeding mechanism is provided with a motor. The receiving tray is a flange plate, and the receiving tray is provided with an O-ring groove. An O-ring is arranged in the O-ring groove. The receiving tray is flange-connected to the bottom of the silo of the negative-pressure feeding and weighing feeder integrated machine and sealed through the O-ring, so that the receiving tray is hermetically docked with the silo of the negative-pressure feeding and weighing feeder integrated machine.

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

[0020] The utility model relates to a quantitative feeding production line. A mixing buffer bin collects rare earth raw materials, collects the bulk rare earth raw materials input manually or the small-pack and small-quantity rare earth raw materials input by a machine, which is convenient for centralized treatment. A negative-pressure feeding weighing and feeding integrated machine weighs the rare earth raw materials in the bin, and feeds the weighed quantitative rare earth raw materials to an electrolytic furnace through a feeding chute. A vacuum pumping system evacuates the bin to form a negative pressure inside the bin, and uses the negative pressure to continuously suck the rare earth raw materials in the mixing buffer bin into the bin of the negative-pressure feeding weighing and feeding integrated machine. The electrolytic furnace electrolyzes the quantitative rare earth raw materials weighed by the negative-pressure feeding weighing and feeding integrated machine into metal. Among them, each negative-pressure feeding weighing and feeding integrated machine includes a bin, a housing and at least one weighing sensor. The bin is arranged in the housing with an annular space left between them, and the bin is arranged on the housing through the weighing sensor. Before use, the switching valve of the feeding chute remains closed, and solid materials accumulate more and more above the switching valve of the feeding chute, in the disk feeder and in the bin, and their weights are collected in real time by three weighing sensors until the weight of the solid materials in the bin reaches the designed value. By adopting the quantitative feeding production line disclosed by the utility model, the powder or particles to be fed can be accurately weighed, and then the weighed quantitative materials are output externally, realizing quantitative feeding to the downstream. Brief Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the quantitative feeding production line provided in Embodiment 1 of the utility model;

[0022] Figure 2 is Figure 1 the enlarged view at A in

[0023] Figure 3 is the structural schematic diagram of the negative-pressure feeding weighing and feeding integrated machine without a housing provided in Embodiment 2 of the utility model;

[0024] Figure 4 is the internal structural schematic diagram of the negative-pressure feeding weighing and feeding integrated machine provided in Embodiment 2 of the utility model;

[0025] Figure 5 is Figure 4 the partial enlarged view at A in

[0026] Figure 6 is the schematic diagram of the weighing sensor arranged in the annular space between the bin and the housing provided in Embodiment 2 of the utility model;

[0027] Figure 7 is Figure 6 the partial enlarged view at B in

[0028] Figure 8 is the three-dimensional structural top view of the disk feeder disclosed in Embodiment 2 of the utility model;

[0029] Figure 9 It is a longitudinal sectional view of the disk feeder disclosed in Embodiment 2 of the present utility model.

[0030] Explanation of reference numerals: 11 - mixing buffer bin, 111 - feeder, 112 - flap valve;

[0031] 12 - negative pressure feeding and weighing feeder integrated machine, 121 - material pipeline, 122 - vacuum pipeline, 123 - pipeline support;

[0032] 13 - first vacuum pump;

[0033] 14 - blanking chute, 140 - lifting switch valve;

[0034] 15 - electrolytic furnace 15;

[0035] 21 - feeding station, 210 - raw material pipeline; 22 - vacuum feeder, 220 - air inlet; 23 - second vacuum pump, 230 - negative pressure pipeline;

[0036] 3 - silo, 300 - housing, 3001 - rectangular frame;

[0037] 30 - load cell, 301 - upper fixing part, 302 - lower fixing part;

[0038] 31 - main material conveying pipe, 311 - dust filter, 312 - gas storage tank, 313 - pulse valve, 314 - spray pipe;;

[0039] 32 - main vacuum pipe, 320 - vacuum branch pipe, 321 - vacuum three-way valve, 322 - first hose;

[0040] 33 - disk feeder, 34 - second hose, 35 - blanking pipe swivel joint;

[0041] 40 - transmission shaft, 41 - motor, 42 - main sprocket, 43 - chain, 44 - sub-sprocket, 45 - bearing;

[0042] 50 - rotating ring, 500 - feeding blade; 51 - receiving tray, 210 - feed inlet, 52 - feeding gear disk, 53 - fixed chassis, 54 - discharge pipe, 55 - discharge hose;

[0043] 6 - O-ring. Detailed implementation manners

[0044] The exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present utility model can be understood more thoroughly and the scope of the present utility model can be fully communicated to those skilled in the art.

[0045] In order to solve the problems that the existing rare earth raw material feeding equipment cannot weigh the materials while collecting rare earth raw materials and cannot feed materials quantitatively to the downstream, the present utility model relates to a quantitative feeding production line. The mixing and buffering bin 11 collects rare earth raw materials, collects the bulk rare earth raw materials manually input or the small packages and small amounts of rare earth raw materials input by machines, which is convenient for centralized processing. The negative pressure feeding and weighing feeder integrated machine 12 weighs the rare earth raw materials in the bin 3 and feeds the weighed quantitative rare earth raw materials to the electrolytic furnace 15 through the feeding chute 14. The vacuum pumping system evacuates the bin 3 to form a negative pressure inside the bin 3, and uses the negative pressure to continuously suck the rare earth raw materials in the mixing and buffering bin 11 into the bin 3 of the negative pressure feeding and weighing feeder integrated machine 12. The electrolytic furnace 15 electrolyzes the quantitative rare earth raw materials weighed by the negative pressure feeding and weighing feeder integrated machine 12 into metals. Among them, each negative pressure feeding and weighing feeder integrated machine 12 includes a bin 3, a housing 300 and at least one weighing sensor 30. The bin 3 is arranged in the housing 300 with an annular space left between them, and the bin 3 is arranged on the housing 300 through the weighing sensor 30. Before use, the switching valve of the feeding chute 14 remains closed, and the solid materials accumulate more and more above the switching valve of the feeding chute 14, above the disk feeder 13 and in the bin 1, and their weights are collected in real time by three weighing sensors 10 until the weight of the solid materials in the bin 1 reaches the designed value. By using the quantitative feeding production line disclosed by the present utility model, the powder or particles to be fed can be accurately weighed, and then the weighed quantitative materials can be output externally to realize quantitative feeding to the downstream.

[0046] Example 1: A quantitative feeding production line

[0047] Embodiment 1 of the present utility model provides a quantitative feeding production line, and its connection relationship will be described in detail below with reference to the accompanying drawings.

[0048] Reference Figure 1 and Figure 2 , the quantitative feeding production line includes a mixing and buffering bin 11, several negative pressure feeding and weighing feeder integrated machines 12, a set of vacuum pumping system and several electrolytic furnaces 15.

[0049] The lower part of the mixing and buffering bin 11 is funnel-shaped;

[0050] Each of the negative-pressure feeding, weighing, and feeding integrated machines 12 includes a bin 3, a housing 300, and at least one weighing sensor 30. The bin 3 is arranged inside the housing 300 with an annular space left between them, and the bin 3 is arranged on the housing 300 through the weighing sensor 30. An inlet and a negative-pressure interface are provided at the upper part of the bin 3 of each negative-pressure feeding, weighing, and feeding integrated machine 12, and an outlet is provided at the bottom. The inlet, the negative-pressure interface, and the outlet are all communicated with the interior of the bin 3. The inlets of the bins 3 of each negative-pressure feeding, weighing, and feeding integrated machine 12 are respectively communicated with the bottom ends of the mixing buffer bins 11 through material pipelines 121.

[0051] The vacuum pumping system includes a first vacuum pump 13 and a vacuum pipeline 122. The negative-pressure interfaces of each negative-pressure feeding, weighing, and feeding integrated machine 12 are respectively butted with the inlet of the first vacuum pump 13 through the vacuum pipeline 122.

[0052] The outlets of the bins 3 of each negative-pressure feeding, weighing, and feeding integrated machine 12 are respectively butted with a blanking chute 14, and the bottom end port of each blanking chute 14 is located above the liquid level of an electrolytic furnace 15.

[0053] Among them, the mixing buffer bin 11 is used to collect rare earth raw materials, collect the bulk rare earth raw materials manually input or the small packages and small amounts of rare earth raw materials input by machines, which is convenient for centralized processing.

[0054] The negative-pressure feeding, weighing, and feeding integrated machine 12 is used to weigh the rare earth raw materials in the bin 3 and send the weighed quantitative rare earth raw materials to the electrolytic furnace 15 through the blanking chute 14.

[0055] The vacuum pumping system is used to evacuate the bin 3 to form a negative pressure inside the bin 3, and use the negative pressure to continuously suck the rare earth raw materials in the mixing buffer bin 11 into the bin 3 of the negative-pressure feeding, weighing, and feeding integrated machine 12.

[0056] The electrolytic furnace 15 is used to electrolyze the quantitative rare earth raw materials weighed by the negative-pressure feeding, weighing, and feeding integrated machine 12 into metal.

[0057] In order to convey the materials in the mixing buffer bin 11 to the negative-pressure feeding, weighing, and feeding integrated machine 12, a feeder 111 is provided at the funnel bottom end of the mixing buffer bin 11. The inlets of the bins 3 of each negative-pressure feeding, weighing, and feeding integrated machine 12 are respectively communicated with the outlet of the feeder 111 through the material pipeline 121.

[0058] Specifically, the feeder 111 is a spiral or impeller feeder equipped with a variable-frequency speed-regulating motor. An air inlet is provided on the feeder 111. The air inlet of the feeder 111 and the material pipeline 121 form a rare-earth material transportation channel for transporting the concentrated rare-earth materials.

[0059] To facilitate the control of discharging from the bottom of the mixing buffer bin 11, a flap valve 112 is provided at the bottom of the mixing buffer bin 11 above the feeder 111.

[0060] To facilitate the control of the material falling during weighing, a switching valve 140 is configured on each of the discharging chutes 14. Preferably, the switching valve 140 is a lifting switching valve. The lifting switching valve not only docks upward with the bin of the negative-pressure feeding and weighing feeder and downward with the discharging chute respectively, but also can block or open the material channel to form a closed state or an open state by movably inserting a switching gate plate in the material channel. When it is necessary to control the flow of materials in the material channel, the material channel can be blocked to enter the closed state or opened to enter the open state.

[0061] In addition to manual feeding, during actual production, machine automatic feeding is also required. To achieve automatic feeding, the quantitative feeding production line further includes a feeding station 21, a raw material pipeline 210, a vacuum feeder 22, a second vacuum pump 23, and a negative-pressure pipeline 230.

[0062] An inlet for raw materials is provided on the upper side of the mixing buffer bin 11. The inlet for raw materials of the mixing buffer bin 11 is connected to the discharge port of the feeding station 21 through the raw material pipeline 210.

[0063] The bottom of the vacuum feeder 22 is provided with a negative-pressure port 220. The vacuum feeder 22 is arranged on the mixing buffer bin 11, and the negative-pressure port 220 of the vacuum feeder 22 is located above the mixing buffer bin 11 and is connected to the inside of the mixing buffer bin 11.

[0064] The air inlet of the second vacuum pump 23 is connected to the negative-pressure port 220 of the vacuum feeder 22 through the negative-pressure pipeline 230.

[0065] Among them, the feeding station 21 is a dust-free sieving feeding station equipped with a vibrating screen. The vibrating screen is equipped with a dust-removing motor. The feeding station 21 is used to receive the original rare-earth raw materials, screen out the impurities in the rare-earth raw materials, separate the impurities, and make the rare-earth raw materials pure.

[0066] The second vacuum pump 23 is used to evacuate the vacuum feeder 22 to form a negative-pressure environment.

[0067] The vacuum feeding machine 22 is used to suck materials from the feeding station 21 to above the mixing buffer bin 11 through negative pressure.

[0068] For the convenience of automatic control, the quantitative feeding production line further includes a controller, and the dust removal motor of the feeding station 21, the variable frequency speed regulating motor of the feeder 111, the plug valve 112, the second vacuum pump 23, the first vacuum pump 13, and each switching valve 140 are respectively connected to the controller.

[0069] As a specific implementation manner, the material pipeline 121 includes a main material pipeline 31 and several material branch pipelines, and each negative pressure feeding and weighing feeder 12 is configured with a material branch pipeline; the feeding ends of the material branch pipelines are respectively butted with the main material pipeline 31 through material three-way valves, and the discharging ends of the material branch pipelines are respectively butted with the feeding ports of the bins 3 of the corresponding negative pressure feeding and weighing feeders 12; wherein, the material three-way valve is used to control the opening and closing of the material supply between the main material pipeline 31 and the feeding port of the bin 3 of the corresponding negative pressure feeding and weighing feeder 12.

[0070] As a specific implementation manner, the vacuum pipeline 122 includes a main vacuum pipeline 32 and several vacuum branch pipelines 320, and each negative pressure feeding and weighing feeder 12 is configured with a vacuum branch pipeline 320; the air inlet ends of the vacuum branch pipelines 320 are respectively butted with the negative pressure interfaces of the bins 3 of the corresponding negative pressure feeding and weighing feeders 12, the air outlet ends of the vacuum branch pipelines 320 are communicated with the main vacuum pipeline 32 through vacuum three-way valves 321, and the air inlet end of the main vacuum pipeline 32 is butted with the air inlet of the first vacuum pump 13; wherein, the connection between the vacuum three-way valve 321 and the main vacuum pipeline 32 is sealed by a hoop or a clamp; the vacuum three-way valve 321 is used to control the opening and closing of the air flow generated by negative pressure between the main vacuum pipeline 32 and the negative pressure interface of the bin 3 of the corresponding negative pressure feeding and weighing feeder 12.

[0071] To support the material pipeline 121 and the vacuum pipeline 122, the quantitative feeding production line further includes several pipeline supports 123, and several pipeline supports 123 are arranged at intervals along the material pipeline 121 or the vacuum pipeline 122, and the material pipeline 121 and / or the vacuum pipeline 122 are arranged on the pipeline supports 123.

[0072] Specifically, both the first vacuum pump 13 and the second vacuum pump 23 are negative pressure Roots blowers or vortex blowers.

[0073] More specifically, the negative pressure feeding and weighing feeder 12 is connected to the controller.

[0074] Specifically, the controller is a programmable logic controller, i.e., PLC, and the controller is configured with a touch screen.

[0075] As a specific implementation manner, upper fixing members 301 and lower fixing members 302 are respectively configured at both ends of each weighing sensor 30 of the negative pressure feeding and weighing feeder integrated machine. The upper fixing member 301 of the weighing sensor 30 is fixed on the housing 300, and the lower fixing member 302 of the weighing sensor 30 is fixed on the bin 3.

[0076] When the number of weighing sensors 30 is one, the single weighing sensor 30 is fixed on the inner wall of the housing 300, and the bin 3 is arranged on the single weighing sensor 30 in a single-point pressing or pulling manner; when the number of weighing sensors 30 is three, the three weighing sensors 30 are evenly spaced in the annular space between the bin 3 and the housing 300, and both ends of each weighing sensor 30 are fixedly connected to the bin 3 and the housing 300 respectively; when the number of weighing sensors 30 is four, the four weighing sensors 30 are evenly spaced in the annular space between the bin 3 and the housing 300, and both ends of each weighing sensor 30 are fixedly connected to the bin 3 and the housing 300 respectively.

[0077] As a specific implementation manner, the negative pressure feeding and weighing feeder integrated machine further includes a dust filter 311 and a filter backwashing and dust cleaning device. The discharge end of the material branch pipe is communicated with the discharge port of the bin 3 of the corresponding negative pressure feeding and weighing feeder integrated machine 12 through the dust filter 311; the filter backwashing and dust cleaning device includes an air storage tank 312, a plurality of pulse valves 313 and a plurality of spray pipes 314. Compressed air is prestored in the air storage tank 312, and a pulse valve 313 is configured between the air storage tank 312 and each spray pipe 314; the air storage tank 312 is arranged on the side wall at the top of the bin 3, and the spray pipe 314 is arranged inside the top of the bin 3; the dust filter 311 is configured with air extraction holes. The spray pipe 314 includes a main pipe and a plurality of branch pipes. The plurality of branch pipes are respectively connected to the main pipe. Air outlet holes are distributed on the main pipe and the branch pipes, and the air outlet holes of the spray pipe 314 are respectively opposite to the air extraction holes of the dust filter 311.

[0078] Further, the negative-pressure feeding, weighing and feeding integrated machine further includes a disk feeder 33. The disk feeder 33 includes a material receiving tray 51, a material feeding mechanism, and a discharge pipe 54. The discharge pipe 54 is communicated with the material receiving tray 51 through the material feeding mechanism. The material receiving tray 51 is located below the discharge port of the material bin 3. The material feeding mechanism is arranged on the material receiving tray 51, and the material feeding mechanism is configured with a motor 41. The material receiving tray 51 is a flange plate, and the material receiving tray 51 is configured with an O-ring groove. An O-ring 6 is arranged in the O-ring groove. The material receiving tray 51 is flange-connected to the bottom of the material bin 3 of the negative-pressure feeding, weighing and feeding integrated machine and sealed through the O-ring 6 to realize the sealed butt joint between the material receiving tray 51 and the material bin 3 of the negative-pressure feeding, weighing and feeding integrated machine.

[0079] For more structural details of the "negative-pressure feeding, weighing and feeding integrated machine", please refer to Embodiment 2.

[0080] Embodiment 2: A negative-pressure feeding, weighing and feeding integrated machine

[0081] Embodiment 2 of the present utility model provides a negative-pressure feeding, weighing and feeding integrated machine, which is used to realize the feeding, weighing and external feeding of rare earth materials in a negative-pressure environment. The structure and connection relationship thereof will be described in detail below.

[0082] Reference Figures 3 to 7 , the negative-pressure feeding, weighing and feeding integrated machine includes a material bin 3, a main material conveying pipe 31, a main vacuum pipe 32, and a disk feeder 33.

[0083] The material bin 3 is in a straight cylinder shape, and a material inlet and a negative-pressure interface are arranged at its upper part, and a discharge port is arranged at its bottom;

[0084] The discharge port of the main material conveying pipe 31 is butted against the material inlet of the material bin 3;

[0085] The air outlet of the main vacuum pipe 32 is used to be butted against a vacuum pump, and its air inlet is butted against the negative-pressure interface of the material bin 3. Among them, when the negative-pressure feeding, weighing and feeding integrated machine is applied to the quantitative feeding production line of Embodiment 1, the "vacuum pump" here is the first vacuum pump 13.

[0086] The disk feeder 33 includes a material receiving tray, and the material receiving tray is located below the discharge port of the material bin 3.

[0087] Among them, the main vacuum pipe 32 is used to evacuate the material bin 3 to form a negative-pressure environment inside the material bin 3;

[0088] The main material conveying pipe 31 provides rare earth raw materials for the material bin 3, and the rare earth raw materials form an air flow mixed with materials in the negative-pressure environment;

[0089] The solid materials in the airflow mixed with materials fall to the bottom of the bin 3, are received by the receiving tray of the rotary feeder 33, and finally are fed out by the rotary feeder 33 to achieve feeding.

[0090] To achieve quantitative weighing of the materials in the bin 3, referring to Figures 4 to 7 , the negative pressure feeding weighing feeder integrated machine further includes a housing 300 and at least one weighing sensor 30. The bin 3 is arranged in the housing 300 with an annular space left between them; the bin 3 is arranged on the inner wall of the housing 300 through the weighing sensor 30.

[0091] Wherein, upper fixing parts 301 and lower fixing parts 302 are respectively configured at both ends of each weighing sensor 30. The upper fixing part 301 of the weighing sensor 30 is fixed on the housing 300, and the lower fixing part 302 of the weighing sensor 30 is fixed on the bin 3.

[0092] The bin 3 is arranged on the inner wall of the housing 300 through the weighing sensor 30 in a single-point compression or tension mode, a three-point compression or tension mode, or a four-point compression or tension mode.

[0093] A specific implementation manner is that when the number of weighing sensors 30 is one, the single weighing sensor 30 is fixed on the inner wall of the housing 300, and the bin 3 is arranged on the single weighing sensor 30 in a single-point compression or tension mode.

[0094] A specific implementation manner is that when the number of weighing sensors 30 is three, the three weighing sensors 30 are evenly spaced in the annular space between the bin 3 and the housing 300, and both ends of each weighing sensor 30 are fixedly connected to the bin 3 and the housing 300 respectively.

[0095] The tops of the three weighing sensors 30 are respectively suspended on the housing 300, and the bottoms of the three weighing sensors 30 are respectively fixed on the outer wall of the bin 3.

[0096] Continue to refer to Figure 5 and Figure 7 , upper fixing parts 301 and lower fixing parts 302 are respectively configured at both ends of each weighing sensor 30. The upper fixing part 301 of the weighing sensor 30 is fixed on the housing 300, and the lower fixing part 302 of the weighing sensor 30 is fixed on the bin 3.

[0097] A specific implementation manner is that when the number of weighing sensors 30 is four, the four weighing sensors 30 are evenly spaced in the annular space between the bin 3 and the housing 300, and both ends of each weighing sensor 30 are fixedly connected to the bin 3 and the housing 300 respectively.

[0098] Specifically, the housing 300 includes a rectangular frame 3001 and plates, such asFigure 4 As shown, the rectangular frame 3001 is a cubic frame composed of columns and crossbeams, and plates are arranged between the connected columns or crossbeams.

[0099] In order to create a negative pressure environment inside the silo 3, in a specific implementation, the intake end of the main vacuum pipeline 32 is docked with a vacuum pump. Each negative pressure feeding, weighing, and dosing machine is equipped with a vacuum branch pipeline 320. The intake end of the vacuum branch pipeline 320 is docked with the negative pressure interface of the silo 3, and the outlet end of the vacuum branch pipeline 320 is docked with the main vacuum pipeline 32 through a vacuum three-way valve 321.

[0100] Among them, the intake end of the vacuum branch pipeline 320 serves as the intake port of the main vacuum pipeline 32 and is connected to the inside of the silo 3 through the negative pressure interface of the silo 3.

[0101] The docking of the intake end of the main vacuum pipeline 32 with the vacuum pump includes the following two forms: When there is only one set of negative pressure feeding, weighing, and dosing machine, the intake end of the main vacuum pipeline 32 is directly docked with the vacuum pump, and its outlet end is set as a blind end. When multiple sets of negative pressure feeding, weighing, and dosing machines are required, the intake end of the first set of negative pressure feeding, weighing, and dosing machine is directly docked with the vacuum pump, and the intake ends of the vacuum main pipelines 32 of the second set, the third set,..., the second-to-last set of negative pressure feeding, weighing, and dosing machines are docked with the outlet ends of the vacuum main pipelines 32 of the adjacent negative pressure feeding, weighing, and dosing machines, and the outlet end of the vacuum main pipeline 32 of the last set of negative pressure feeding, weighing, and dosing machine is set as a blind end.

[0102] Preferably, the docking part of the vacuum three-way valve 321 and the main vacuum pipeline 32 is sealed and connected through a hoop or a clamp.

[0103] Preferably, the vacuum three-way valve 321 and the vacuum branch pipeline 320 are connected through a first hose 322.

[0104] As a specific implementation, the middle part of each main material conveying pipeline 31 is connected to a material branch pipeline through a second three-way valve, and the discharge end of the material branch pipeline is connected to the feed port of the silo 3. Among them, the feed end of the main material conveying pipeline 31 is used to dock with the discharge port of the material 12 for this negative pressure feeding, weighing, and dosing machine, and the other end is set as a blind end or docked with the discharge end of the main material conveying pipeline 31 of the next set of negative pressure feeding, weighing, and dosing machines.

[0105] Furthermore, this negative pressure feeding, weighing, and dosing machine further includes a dust filter 311, and the discharge end of the material branch pipeline and the feed port of the silo 3 are connected through the dust filter 311. Among them, the dust filter 311 is a prior art and will not be elaborated here.

[0106] Furthermore, this negative pressure feeding, weighing, and dosing machine further includes a filter backwashing and dust cleaning device, refer toFigure 4 , the filter backflush dust cleaning device includes an air storage tank 312, a plurality of pulse valves 313 and a plurality of blowpipes 314. Compressed air is pre-stored in the air storage tank 312, and a pulse valve 313 is arranged between the air storage tank 312 and each blowpipe 314;

[0107] The air storage tank 312 is arranged on the side wall at the top of the silo 3, and the blowpipe 314 is arranged inside the top of the silo 3;

[0108] The dust filter 311 is configured with air extraction holes. The blowpipe 314 includes a main pipe and a plurality of branch pipes. The plurality of branch pipes are connected to the main pipe, and air outlet holes are distributed on the main pipe and the branch pipes. The air outlet holes of the blowpipe 314 are respectively aligned with the air extraction holes of the dust filter 311.

[0109] Continue to refer to Figure 4 , the material receiving tray 51 is hermetically butted with the bottom end port of the silo 3. Specifically, a flange is used as the material receiving tray 51 of the disk feeder 33, and the material receiving tray 51 and the bottom end port of the silo 3 are hermetically butted in the form of a flange and a sealing strip, and the material receiving tray is located below the discharge port of the silo 3 and is connected to the inside of the silo 3.

[0110] A specific implementation manner is, refer to Figure 8 and Figure 9 , the disk feeder 33 includes a material receiving tray 51, a material distributing mechanism and a discharge pipe 54, and the discharge pipe 54 is communicated with the material receiving tray 51 through the material distributing mechanism.

[0111] Specifically, the material distributing mechanism is arranged on the material receiving tray 51, and the material distributing mechanism is configured with a motor 41; the material receiving tray 51 is hermetically butted with the silo 3 of the negative pressure feeding and weighing feeder.

[0112] As a specific implementation manner, continue to refer to Figure 8 and Figure 9 , the disk feeder 33 further includes a fixed chassis 53, and the material distributing mechanism includes a transmission shaft 40, a rotating ring 50 and a feeding gear disk 52,

[0113] The material receiving tray 51 and the fixed chassis 53 are covered up and down to form a temporary material transportation cavity for temporarily loading and transporting materials;

[0114] A plurality of material distributing blades 500 are arranged on the rotating ring 50, and the rotating ring 50 is closely attached to the material receiving tray 51;

[0115] A plurality of continuous teeth are circumferentially arranged on the outer edge of the feeding gear disk 52, and the feeding gear disk 52 is installed in the temporary material transportation cavity;

[0116] The rotating ring 50, the material receiving tray 51, the feeding gear disk 52 and the fixed chassis 53 are sleeved on the transmission shaft 40 in sequence from top to bottom, and the transmission shaft 40 sequentially passes through the fixed chassis 53 and the material receiving tray 51 upward. The rotating ring 50 and the feeding gear disk 52 are respectively fixed on the transmission shaft 40;

[0117] The material receiving tray 51 is provided with a feeding port 510. During the rotation of the rotating ring 50, the material pushing blade 500 rotates on the material receiving tray 51 and can sweep the materials on the material receiving tray 51 into the feeding port 510;

[0118] The fixed chassis 53 is provided with a discharging port, and the discharging port is staggered with the feeding port 510; the discharging port of the fixed chassis 53 and the feeding port 510 of the material receiving tray 51 are at an equal distance from the transmission shaft 40, and both the discharging port and the feeding port 510 are inside the gap between adjacent teeth of the feeding gear disk 52;

[0119] During the rotation of the feeding gear disk 52, the teeth of the feeding gear disk 52 can sweep the materials falling into the gap between adjacent teeth of the feeding gear disk 52 to the discharging port.

[0120] The disk feeder 33 further includes a transmission mechanism, and the transmission mechanism includes a motor 41, a main sprocket 42, a chain 43 and a secondary sprocket 44. The main sprocket 42 is arranged on the output shaft of the motor 41, the secondary sprocket 44 is arranged at the bottom end of the transmission shaft 1, and the main sprocket 42 and the secondary sprocket 44 are connected by the chain 43.

[0121] Further, the transmission shaft 1 and the fixed chassis 53 are connected by a bearing 45.

[0122] Further, a discharging flexible pipe 55 is sleeved on the discharging pipe 54 for connecting to the discharging chute pipe 14.

[0123] For more detailed structural forms of the "disk feeder", a detailed introduction is provided in another utility model patent application "A Disk Feeder" of the patent cluster related to the present invention.

[0124] Further, a discharging pipe rotary joint 35 is arranged on the bottom plate of the housing 300, and the discharging pipe rotary joint 35 is communicated with the discharging pipe 54 of the disk feeder 33 through a second flexible pipe 34.

[0125] In order to lead out materials from the disk feeder 33, the negative pressure feeding and weighing feeder further includes a discharging chute pipe 14, and the discharging chute pipe 14 is docked with the discharging pipe rotary joint 35, as Figure 3As shown. Further, in order to control the blanking, a switching valve 140 is provided on the blanking chute 14, and the switching valve is preferably a lifting switching valve, such as Figure 3 As shown.

[0126] Before use, the switching valve of the blanking chute 14 remains closed. The working principle of this negative pressure feeding and weighing feeder is as follows:

[0127] The vacuum main pipe 32 evacuates the bin 3 to form a negative pressure environment. The material conveying main pipe 31 supplies rare earth raw materials to the bin 3. The rare earth raw materials form an air flow mixed with materials in the negative pressure environment;

[0128] The air flow mixed with materials continuously sucks the rare earth raw materials in the mixing buffer bin 11 into the bin 3 of the negative pressure feeding and weighing feeder 12;

[0129] The air flow with materials first passes through the dust filter 111. The gas in the air flow enters the vacuum main pipe 12 and is finally absorbed by the vacuum pump docked with the vacuum main pipe 12. The solid materials in the air flow fall to the bottom of the bin 1 in the bin 1 until they enter the receiving tray 21 of the disk feeder 13 through the discharge port of the bin 1 and are blocked above the switching valve of the blanking chute 14;

[0130] The solid materials accumulate more and more above the switching valve of the blanking chute 14, in the disk feeder 13 and in the bin 1. Their weights are collected in real time by the three weighing sensors 10 until the weight of the solid materials in the bin 1 reaches the designed value;

[0131] Open the switching valve on the blanking chute 14. The accumulated solid materials gradually flow out from the blanking chute 14. At the same time, start the motor 41 of the disk feeder 13. The materials in the bin 1 enter the receiving tray of the disk feeder 13 from the discharge port of the bin 1. The disk feeder 13 continuously conveys the fixed materials out, realizing the blanking of rare earth materials until all the solid materials in the bin 1 are emptied

[0132] Example 3: A method for quantitative feeding production

[0133] Embodiment 3 of the present utility model provides a method for quantitative feeding production, which is divided into three processes: feeding, supplementary feeding, and adding materials. The quantitative feeding production line of Embodiment 1 is adopted. This quantitative feeding production method includes the following steps:

[0134] Step A: Concentrate and temporarily store small packages or small amounts of rare earth raw materials in the mixing buffer bin 11, and collect pure rare earth raw materials, including the following steps:

[0135] Step A1: The feeding station 21 continuously receives small packages or small amounts (such as in bags) of rare earth raw materials. The rare earth raw materials are sieved in the feeding station 21, and the impurities therein are separated to become pure rare earth raw materials;

[0136] Step A2: Keep the second vacuum pump 23 in the startup state. The second vacuum pump 23 evacuates the vacuum feeding machine 22. Under negative pressure operation, the vacuum feeding machine 22 continuously sucks in the gas in the mixing material buffer bin 11 to form an air flow. Under the action of the air flow, the pure rare earth raw materials are transported into the mixing material buffer bin 11 through the raw material pipeline 210;

[0137] Step A3: Repeat Step A2. The pure rare earth raw materials are continuously mixed and centrally stored in the mixing material buffer bin 11 for future use.

[0138] Step B: Start the first vacuum pump 13. The inside of the negative pressure feeding, weighing and feeding integrated machine 12 is evacuated to form a negative pressure environment. Under the action of negative pressure, the collected pure rare earth raw materials are transported to the negative pressure feeding, weighing and feeding integrated machine 12 for weighing, and the quantitatively weighed pure rare earth raw materials are transported into the electrolysis furnace 15;

[0139] Among them, when the negative pressure feeding, weighing and feeding integrated machine 12 does not feed the corresponding electrolysis furnace 15, the negative pressure feeding, weighing and feeding integrated machine 12 obtains a material shortage signal after comparing the material weight collected by the weight sensor with the set lower limit of the silo, indicating that the negative pressure feeding, weighing and feeding integrated machine 12 detects a material shortage, and then adopts a supplementary feeding measure, including the following specific steps:

[0140] Step B1: Open the material three-way valve on the material pipeline 121 and the vacuum three-way valve on the vacuum pipeline 122 corresponding to the negative pressure feeding, weighing and feeding integrated machine 12 with a material shortage, and close all the material three-way valves on the material pipelines 121 and the vacuum three-way valves on the vacuum pipelines 122 corresponding to the other negative pressure feeding, weighing and feeding integrated machines 12;

[0141] Step B2: The rare earth materials to be processed cached in the mixing material buffer bin 11 slide to the bottom of the funnel. Open the feeder 111. The rare earth materials to be processed are transported into the negative pressure feeding, weighing and feeding integrated machine 12 through the material pipeline 121 until the negative pressure feeding, weighing and feeding integrated machine 12 detects the upper limit of the material level and stops feeding.

[0142] When multiple negative pressure feeding, weighing and feeding integrated machines 12 are short of materials, supplementary feeding is carried out in sequence. The feeding method includes the following steps:

[0143] Step C1: The operator first sets the weight to be fed and the required feeding time through the touch screen;

[0144] Step C2: Then start the negative pressure feeding weighing and feeding integrated machine 12, which checks the real-time weight of the silo through a weighing sensor to calculate the discharge flow rate and weight, and performs PID calculation with the set weight and flow rate to control the real-time discharge amount of the negative pressure feeding weighing and feeding integrated machine 12;

[0145] Step C3: the material enters the electrolytic furnace 15 through the discharge chute 14 .

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A quantitative feeding production line, characterized in that, including a number of negative pressure feeding and weighing feeders (12), each of the negative pressure feeding and weighing feeders (12) includes a bin (3), a housing (300) and at least one weighing sensor (30), the bin (3) is arranged inside the housing (300) with an annular space left between them, and the bin (3) is arranged on the housing (300) through the weighing sensor (30); an upper part of the bin (3) of each negative pressure feeding and weighing feeder (12) is provided with a feed inlet and a negative pressure interface, and a discharge outlet is arranged at the bottom, and the feed inlet, the negative pressure interface and the discharge outlet are all communicated with the inside of the bin (3); a set of vacuum pumping system, including a first vacuum pump (13) and a vacuum pipeline (122), and the negative pressure interfaces of each negative pressure feeding and weighing feeder (12) are respectively docked with the inlet of the first vacuum pump (13) through the vacuum pipeline (122); a number of electrolytic furnaces (15), the discharge outlets of the bins (3) of each negative pressure feeding and weighing feeder (12) are respectively docked with a blanking chute (14), and the bottom end port of each blanking chute (14) is located above the liquid level of an electrolytic furnace (15).

2. The quantitative feeding production line according to claim 1, wherein It further includes a mixing buffer bin (11) with a funnel-shaped lower part, and the feed inlets of the bins (3) of each negative pressure feeding and weighing feeder (12) are respectively communicated with the bottom end of the mixing buffer bin (11) through a material pipeline (121); a feeder (111) is arranged at the funnel bottom end of the mixing buffer bin (11), and the feed inlets of the bins (3) of each negative pressure feeding and weighing feeder (12) are respectively communicated with the discharge outlet of the feeder (111) through a material pipeline (121).

3. The quantitative feeding production line according to claim 2, characterized in that a flap valve (112) is arranged at the bottom of the mixing buffer bin (11) above the feeder (111).

4. The quantitative feeding production line according to claim 1, characterized in that a switching valve (140) is arranged on each blanking chute (14).

5. The quantitative feeding production line according to claim 3, characterized in that, It further includes a feeding station (21), a raw material pipeline (210), a vacuum feeder (22), a second vacuum pump (23) and a negative pressure pipeline (230), a raw material inlet is arranged on the upper side of the mixing buffer bin (11), and the raw material inlet of the mixing buffer bin (11) is communicated with the discharge outlet of the feeding station (21) through the raw material pipeline (210); a negative pressure port (220) is arranged at the bottom of the vacuum feeder (22), the vacuum feeder (22) is arranged on the mixing buffer bin (11), and the negative pressure port (220) of the vacuum feeder (22) is located above the mixing buffer bin (11) and is communicated with the inside of the mixing buffer bin (11); the inlet of the second vacuum pump (23) is communicated with the negative pressure port (220) of the vacuum feeder (22) through the negative pressure pipeline (230).

6. The quantitative feeding production line according to claim 3, characterized in that The material pipeline (121) includes a main material pipeline (31) and a number of material branch pipelines, and each negative pressure feeding and weighing feeder (12) is configured with a material branch pipeline; The feeding ends of the material branch pipelines are respectively butted against the main material pipeline (31) through material three-way valves, and the discharging ends of the material branch pipelines are respectively butted against the feeding ports of the bins (3) of the corresponding negative pressure feeding and weighing feeders (12).

7. The quantitative feeding production line according to claim 1, wherein The vacuum pipeline (122) includes a main vacuum pipeline (32) and a number of vacuum branch pipelines (320), and each negative pressure feeding and weighing feeder (12) is configured with a vacuum branch pipeline (320); The air inlet ends of the vacuum branch pipelines (320) are respectively butted against the negative pressure interfaces of the bins (3) of the corresponding negative pressure feeding and weighing feeders (12), the air outlet ends of the vacuum branch pipelines (320) are communicated with the main vacuum pipeline (32) through vacuum three-way valves (321), and the air inlet end of the main vacuum pipeline (32) is butted against the air inlet of the first vacuum pump (13).

8. The quantitative feeding production line according to claim 1, wherein Upper fixing parts (301) and lower fixing parts (302) are respectively arranged at both ends of each weighing sensor (30) of the negative pressure feeding and weighing feeder, the upper fixing part (301) of the weighing sensor (30) is fixed on the housing (300), and the lower fixing part (302) of the weighing sensor (30) is fixed on the bin (3); Wherein, when the number of weighing sensors (30) is one, the single weighing sensor (30) is fixed on the inner wall of the housing (300), and the bin (3) is arranged on the single weighing sensor (30) in a single-point pressing or pulling manner; When the number of weighing sensors (30) is three, the three weighing sensors (30) are evenly spaced in the annular space between the bin (3) and the housing (300), and both ends of each weighing sensor (30) are fixedly connected to the bin (3) and the housing (300) respectively; When the number of weighing sensors (30) is four, the four weighing sensors (30) are evenly spaced in the annular space between the bin (3) and the housing (300), and both ends of each weighing sensor (30) are fixedly connected to the bin (3) and the housing (300) respectively.

9. The quantitative feeding production line according to claim 6, wherein The negative pressure feeding and weighing feeder further includes a dust filter (311) and a filter backwashing and dust cleaning device, The discharging end of the material branch pipeline is communicated with the feeding port of the bin (3) of the corresponding negative pressure feeding and weighing feeder (12) through the dust filter (311); The filter backwashing and dust cleaning device includes an air storage tank (312), a number of pulse valves (313) and a number of spray pipes (314), compressed air is pre-stored in the air storage tank (312), and a pulse valve (313) is arranged between the air storage tank (312) and each spray pipe (314); The gas storage tank (312) is arranged on the side wall at the top of the silo (3), and the injection pipe (314) is arranged inside the top of the silo (3); The dust filter (311) is configured with air extraction holes. The injection pipe (314) includes a main pipe and several branch pipes. The several branch pipes are respectively connected to the main pipe. Air outlet holes are distributed on the main pipe and the branch pipes. The air outlet holes of the injection pipe (314) are respectively opposite to the air extraction holes of the dust filter (311).

10. The quantitative feeding production line according to claim 1, characterized in that, The negative pressure feeding and weighing feeder also includes a disk feeder (33), The disk feeder (33) includes a material receiving tray (51), a material feeding mechanism and a discharge pipe (54). The discharge pipe (54) is communicated with the material receiving tray (51) through the material feeding mechanism; The material receiving tray (51) is located below the discharge port of the silo (3); The material feeding mechanism is arranged on the material receiving tray (51), and the material feeding mechanism is configured with a motor (41); The material receiving tray (51) is a flange plate. The material receiving tray (51) is configured with an O-ring groove. An O-ring (6) is arranged in the O-ring groove. The material receiving tray (51) is flange-connected to the bottom of the silo (3) of the negative pressure feeding and weighing feeder and sealed by the O-ring (6) so that the material receiving tray (51) is hermetically docked with the silo (3) of the negative pressure feeding and weighing feeder.

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