Multi-raw-material distributing device based on synchronous speed regulation and using method thereof

Abstract

The invention discloses a multi-raw-material distribution device based on synchronous speed regulation and a use method thereof, belongs to the technical field of metallurgical equipment, and is used for solving the problems of multi-raw-material distribution control and equipment synchronization in core-spun yarn production. The device comprises a raw material distribution unit (a two-stage closed material distribution container containing an independent material storage bin and a flow control mechanism), a conveying unit (a belt conveyor, and a belt is tightly attached to a material distribution outlet), and a synchronous speed regulation unit (a speed detection module is coaxially connected with a driven wheel, feeds back the actual speed of the cored wire in real time, and drives the belt conveyor to be synchronous with a main machine through signal processing). Dust leakage is reduced through a closed structure, the three-stage storage bin supports independent proportioning of various raw materials, slipping and material leakage are avoided through speed measurement of a driven wheel, and the synchronization precision is high. Compared with traditional imported equipment, the cost is reduced, the batching error is controlled within + / -2%, and the device is suitable for efficient production of multi-component cored wires in the ferrous metallurgy industry and has the advantages of being environmentally friendly, accurate and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical equipment, and specifically to a multi-material feeding device based on synchronous speed regulation and its usage method. Background Art

[0002] As a key raw material for adjusting the composition of molten steel and purifying steel quality in the iron and steel metallurgy industry, the production process of cored wire is crucial for the quality of metallurgical products. The production of cored wire requires more than twenty processes such as unwinding, rolling, feeding, and winding. Among them, the control of raw material feeding and the synchronization of equipment are the core bottlenecks restricting production efficiency and product quality.

[0003] In the prior art, the feeding of powdered alloy core materials for cored wire generally uses an open asynchronous spiral feeding system, which relies on manual pouring of raw materials into the hopper, resulting in excessive dust concentration in the workshop. Workers need to wear dust masks to operate, with high labor intensity and occupational health risks. At the same time, the traditional feeding system only supports single-material production. For high-end cored wires containing more than two alloy components, domestic enterprises have to adopt imported production lines or semi-automatic manual adjustment schemes: Although imported equipment can achieve multi-material ratio, the cost per unit is as high as 2 million yuan, and the control system is complex and the maintenance cycle is long; semi-automatic production relies on manual frequent adjustment of valves, and the batching error exceeds ±15%, making it difficult to meet the process requirements of precision metallurgy scenarios such as aerospace.

[0004] In the field of speed synchronization control, the traditional solution uses an encoder to detect the rotational speed of the main motor. However, this method can only reflect the motion state of the motor shaft and cannot monitor the actual operation of the cored wire. When abnormalities such as idling of the pressure wheel or wire breakage occur, the encoder still outputs the motor speed signal, resulting in a lag in the shutdown of the feeding system (the delay is more than 0.5 seconds), a large amount of material leakage, causing waste of raw materials and quality defects. In addition, the synchronous control system based on PLC is costly and difficult to expand and maintain, making it difficult to adapt to the equipment upgrade needs of small and medium-sized metallurgical enterprises.

[0005] With the surge in demand for multi-component composite cored wire in the metallurgy industry, the defects of traditional production technologies in dust control, multi-material adaptation, synchronization accuracy, and cost control have become increasingly prominent. Developing a feeding device with high-efficiency ratio, precise synchronization, low consumption, and environmental protection has become the key technical bottleneck to break through the monopoly of imported equipment and enhance the competitiveness of domestic cored wire production. The present invention systematically solves the pain points of the prior art through a multi-stage closed feeding structure and a passive wheel direct speed measurement scheme, providing key equipment support for the green and intelligent production of the metallurgy industry. Summary of the Invention

[0006] The present invention aims to overcome the above-mentioned drawbacks of the prior art and provides a multi-material feeding device based on synchronous speed regulation and its usage method.

[0007] The technical solution adopted by the present invention is as follows: A multi-material feeding device based on synchronous speed regulation, comprising: Raw material distribution unit: It includes two-stage closed feeding containers. Both two-stage feeding containers are provided with corresponding multiple independent storage bins. The lower end of the first-stage feeding container is connected to the second-stage feeding container through a flow control mechanism. The second-stage feeding container is provided with multiple independently adjustable feeding outlets, and each feeding outlet is provided with a flow regulating valve; Conveying unit: It includes a belt conveyor directly connected to the feeding outlet of the second-stage feeding container. The conveying surface of the belt conveyor is closely attached to the lower part of the feeding outlet. The belt conveyor also includes a driving wheel and a driven wheel; Synchronous speed regulation unit: It includes a speed detection module, a signal processing module and a driving module. The speed detection module is coaxially connected to the driven wheel, and it real-time detects the actual running speed of the cored wire and generates a feedback signal. The signal processing module converts the feedback signal into a speed regulation instruction. The driving module is connected to the driving wheel and controls the driving motor of the belt conveyor to run synchronously with the cored wire main machine according to the speed regulation instruction.

[0008] Further, the flow control mechanism includes a gate valve and a sealing flange. The gate valve is used to adjust the raw material flow from the first-stage feeding container to the second-stage feeding container. The sealing flange is fastened by rubber gaskets and bolts to prevent dust leakage.

[0009] Further, the multiple feeding outlets of the second-stage feeding container are arranged at equal intervals along the conveying direction of the belt conveyor. The flow regulating valve of each feeding outlet adjusts the opening degree through a manual knob or electric control, and the opening degree value is visualized through a scale mark.

[0010] Further, the speed detection module is a three-phase AC tachogenerator. Its rotor is coaxially fixed to the driven wheel through a coupling, and its stator is installed on the cored wire main machine frame through a rigid bracket.

[0011] Further, the number of independent storage bins of the first-stage feeding container and the second-stage feeding container is 3 respectively, which are used to store different types of alloy powder raw materials. The storage bin capacity of the first-stage feeding container is larger than that of the second-stage feeding container.

[0012] Further, the synchronous speed regulation unit further includes an emergency braking module. When the feedback signal of the speed detection module continuously is lower than the set threshold for more than 3 seconds, the driving module immediately cuts off the power supply of the driving motor.

[0013] Further, a using method of a multi-material feeding device based on synchronous speed regulation, S1: Load various raw materials into the independent storage bins of the first-stage feeding container respectively, and adjust the raw material flow into the second-stage feeding container through the flow control mechanism; S2: At each cloth outlet of the second-level cloth container, manually or automatically calibrate the opening degree of the flow regulating valve so that each raw material is output to the belt conveyor according to a preset ratio; S3: Start the belt conveyor, and use the speed detection module to detect the rotation speed of the driven wheel in real time, and generate a feedback signal corresponding to the actual running speed of the core-spun yarn; S4: Convert the feedback signal into a speed regulation command through the signal processing module, and the drive module controls the drive motor of the belt conveyor according to the speed regulation command to make the running speed of the belt conveyor synchronize with the main machine of the core-spun yarn.

[0014] Further, the calibration of the opening degree of the flow regulating valve in step S2 includes: When the main machine of the core-spun yarn is not started, manually adjust each flow regulating valve to the initial opening degree; Start the belt conveyor and collect the raw materials output from each cloth outlet, weigh them and compare with the preset ratio; Repeat adjusting the opening degree of the flow regulating valve until the actual output ratio error ≤ 2%, lock the valve opening degree and record it.

[0015] Further, the conversion process of the signal processing module in step S4 includes: Convert the three-phase AC signal output by the tachogenerator into a DC signal through a full-wave rectifier circuit; Input the adjusted DC signal into the frequency converter to control the stepless speed regulation of the drive motor of the belt conveyor.

[0016] Further, it also includes an emergency control step: When the speed detection module detects that the rotation speed of the driven wheel is lower than 50% of the set threshold for more than 5 seconds, or detects that the rotation speed is zero, the drive module immediately cuts off the power supply of the belt conveyor; At the same time, close the flow regulating valve to make the belt conveyor stop running completely within 2 seconds to prevent raw material leakage.

[0017] To sum up, due to the adoption of the above technical solutions, the beneficial effects of the present invention are: The present invention realizes multi-dimensional technical breakthroughs through a multi-stage closed cloth structure and synchronous control of driven wheel speed measurement: 1. Double reduction of dust pollution and labor intensity: Two-stage closed funnels with sealed flanges reduce dust leakage compared with traditional open hoppers. Combined with the design of large-capacity storage in the first stage, the frequency of manual feeding is reduced and the labor intensity is reduced.

[0018] 2. Precise control of multi-raw material ratio: Multiple independent storage bins + visual scale valves support synchronous ratio of multiple raw materials. Through the calibration process of "coarse adjustment of feeding + fine adjustment of weighing", the proportioning error is controlled within ±2%. It replaces imported equipment to realize the localization of complex processes and reduces the equipment cost.

[0019] 3. Zero deviation in speed synchronization: The passive wheel directly measures speed to replace the traditional encoder, which can reflect the actual operating state of the cored wire in real time. When slippage or wire breakage occurs, it will trigger shutdown within a short time, reducing the incidence of leakage accidents. The speed measurement generator + frequency converter has a minimalist control chain, reducing costs compared to the PLC solution and improving maintenance efficiency.

[0020] 4. Improvement in production safety and flexibility: The emergency braking module can complete the dual actions of power-off and valve closing within a short time, eliminating the risk of leakage. The speed of the belt conveyor is steplessly adjustable from 0 to 10 m / min, adapting to various specifications of the main machine, improving the production efficiency of model changeover, and meeting the production requirements of multiple varieties and high precision in the metallurgical industry. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the invention structure; Markings in the figure: 1 - First-stage cloth container, 2 - Second-stage cloth container, 3 - Flow regulating valve, 4 - Belt conveyor, 5 - Driving wheel, 6 - Driven wheel, 7 - Speed detection module, 8 - Signal processing module, 9 - Driving module. Detailed Embodiment

[0022] The present invention will be described in detail below with reference to the drawings.

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Embodiment 1 In this embodiment, as Figure 1 shown, a multi-material cloth feeding device based on synchronous speed regulation includes: Raw material distribution unit: It includes two levels of enclosed cloth containers. Each of the two cloth containers is provided with a corresponding plurality of independent storage bins. The lower end of the first-stage cloth container is connected to the second-stage cloth container through a flow control mechanism. The second-stage cloth container is provided with a plurality of independently adjustable cloth outlets, and each cloth outlet is provided with a flow regulating valve; Conveying unit: It includes a belt conveyor directly connected to the cloth outlet of the second-stage cloth container. The conveying surface of the belt conveyor is closely attached to the lower part of the cloth outlet. The belt conveyor also includes a driving wheel and a driven wheel; Synchronous speed regulation unit: It includes a speed detection module, a signal processing module and a driving module. The speed detection module is coaxially connected to the driven wheel, which can detect the actual running speed of the cored wire in real time and generate a feedback signal. The signal processing module converts the feedback signal into a speed regulation instruction. The driving module is connected to the driving wheel and controls the driving motor of the belt conveyor to run synchronously with the cored wire main machine according to the speed regulation instruction.

[0025] Raw material distribution unit: The first-stage cloth-feeding container is a cylindrical sealed tank with 3 discharge ports evenly distributed at the bottom. Each discharge port is connected to a gate valve (flow control mechanism) through a flange; the second-stage cloth-feeding container is a rectangular box with 3 feed ports corresponding to the first-stage discharge ports at the top, and is connected to the first stage through a sealing flange (with a rubber gasket). 3 cloth outlets are evenly arranged at the bottom of the second stage along the conveying direction of the belt conveyor, and a manual flow regulating valve (with a dial) is installed at each outlet.

[0026] Conveying unit: The belt conveyor is horizontally installed below the second-stage cloth-feeding container, and the gap between the belt surface and the lower end surface of the cloth outlet is ≤5mm (adjustable according to the particle size of the raw material) to ensure that the raw material directly falls on the belt. The driving wheel (with a reduction motor) and the driven wheel (idler wheel) are respectively arranged at both ends of the conveyor, and the shaft end of the driven wheel is connected to a tachogenerator (speed detection module) through a coupling.

[0027] Synchronous speed regulation unit: The stator of the tachogenerator is fixed to the main machine frame through an L-shaped bracket, and the rotor is rigidly connected to the driven wheel coaxially; the signal processing module includes a three-phase full-wave rectification circuit board (with 6 diodes built-in) and a two-stage potentiometer voltage regulation circuit, and the output end is connected to the analog input terminal of the frequency converter (drive module).

[0028] Specifically: The raw material flows quantitatively into the corresponding storage bin of the second stage through the gate valve from the first-stage storage bin. The opening of the cloth outlet valve is adjusted according to the formula, and the raw material falls on the belt surface and is conveyed to the main machine station.

[0029] The driven wheel moves synchronously with the core wire, driving the rotor of the tachogenerator to rotate to generate an alternating voltage (the voltage value is proportional to the speed). After rectification and voltage regulation, a 0-10V DC signal is generated to control the output frequency of the frequency converter, and the speed of the belt motor is adjusted in real time.

[0030] Beneficial effects: Two-stage sealed structure: The dust overflow path is blocked through the sealing flange and rubber gasket, reducing dust leakage compared with the traditional open hopper and improving the workshop environment.

[0031] Direct speed measurement of the driven wheel: The tachogenerator detects the speed of the driven wheel clamped by the core wire. When the core wire breaks or slips and does not move, the driven wheel does not rotate either. In this way, the signal detected by the tachogenerator is consistent with the speed of the core wire. The AC voltage signal detected by the tachogenerator directly controls the frequency converter after rectification. During production, the synchronizer can freely follow the speed of the main machine, so that the same effect as using PLC technology can be achieved, greatly reducing the equipment cost, improving the reliability of the system at the same time, and making the system easy to expand and maintain.

[0032] Independent distribution of multiple raw materials: 3 sets of independent storage bins + material outlet design, supporting simultaneous proportioning of up to 3 kinds of raw materials, which improves the process adaptability compared with the traditional single raw material system.

[0033] Furthermore, the flow control mechanism includes a gate valve and a sealing flange. The gate valve is used to adjust the flow of raw materials from the first-stage distribution container to the second-stage distribution container. The sealing flange is fastened with a rubber gasket and bolts to prevent dust leakage.

[0034] The discharge port of the first-stage material distribution container and the feed port of the second-stage material distribution container are connected by flanges, and a rubber gasket is sandwiched between the flanges. The gate valve is a manual sliding structure, and the cross-section of the valve plate is trapezoidal. The opening and closing degree of the valve plate is controlled by driving the screw with a handle.

[0035] When loading, open the gate valve and the raw materials fall into the second-stage storage bin by gravity; during normal production, adjust the valve plate position (such as full open, 1 / 2 open, etc.) through the handle to control the feed flow from the first stage to the second stage (such as keeping the second-stage material level ≥20cm).

[0036] Rubber gasket + bolt seal: a rigid sealing surface is formed through mechanical compression, which completely prevents dust leakage from the joint and solves the dust problem of traditional open hoppers.

[0037] Rough adjustment of gate valve flow rate: the falling speed of raw materials is controlled by the valve disc stroke, and the second-stage valve is fine-tuned to achieve two-level control of "rough adjustment of feed amount + fine adjustment of proportion" to improve batching efficiency.

[0038] Furthermore, the multiple material outlets of the second-level material distribution container are arranged at equal intervals along the conveying direction of the belt conveyor, and the flow regulating valve of each material distribution outlet is opened by a manual knob or electrically controlled, and the opening value is visualized by a scale mark.

[0039] The three outlets at the bottom of the second-level material distribution container are arranged in a straight line with equal spacing (20cm spacing), and each outlet corresponds to a different area of the belt conveyor. The flow control valve is a butterfly valve structure, with a round knob installed at the exposed end of the valve stem. The outer circumference of the knob is engraved with 11 levels of opening marks from 0 to 10 (each level corresponds to a 5% change in the cross-sectional area of the valve port).

[0040] Working principle: When mixing ingredients, according to the formula ratio (such as material A: material B: material C = 5:3:2), rotate the knob clockwise to the corresponding scale (such as material A knob is adjusted to level 8, material B is adjusted to level 6, and material C is adjusted to level 4), and control the falling flow of raw materials by changing the cross-sectional area of the valve port (the larger the cross-sectional area, the higher the flow).

[0041] Equally spaced material outlets: Different raw materials are laid horizontally in layers on the belt, and can be evenly mixed after the subsequent rolling process, which improves the mixing uniformity compared to traditional single-point laying.

[0042] Visual scale identification: To avoid empirical errors during manual adjustment and cooperate with the calibration process, the batching ratio error can be controlled within ±2%, meeting the requirements of high-precision processes.

[0043] Furthermore, the speed detection module is a three-phase AC tachogenerator. Its rotor is coaxially fixed with the driven wheel through a coupling, and the stator is installed on the main frame of the cored wire machine through a rigid bracket.

[0044] The tachogenerator selects a three-phase AC permanent magnet generator (rated voltage 50V). The rotor shaft is connected to the end of the driven wheel shaft through an elastic coupling; the stator housing is fixed to the angle steel bracket of the main frame through U-bolts, and a rubber shock pad is installed between the bracket and the generator.

[0045] When the driven wheel moves with the cored wire, it drives the generator rotor to rotate synchronously through the coupling, cutting the stator magnetic field to generate a three-phase AC voltage (for example, when the cored wire speed is 5m / min, the output voltage is 25V, and when the speed is 10m / min, the output is 50V).

[0046] Rigid coaxial connection: The coupling transmits the speed of the driven wheel without slip, and the rubber shock pad isolates the vibration interference of the main machine, ensuring the stability of the voltage signal (fluctuation ≤ ±0.5V), and improving the anti-interference ability compared with the traditional encoder scheme.

[0047] Directly detect the actual speed: The driven wheel is in contact with the surface of the cored wire (similar to the structure of a pressure wheel). When wire breakage or slipping occurs, the driven wheel immediately stops rotating, the generator output voltage returns to zero, and the belt is synchronously triggered to stop, avoiding material leakage accidents (the traditional encoder has a delay of more than 0.5 seconds).

[0048] Furthermore, the number of independent storage bins for both the first-stage batching container and the second-stage batching container is 3, which are respectively used to store different types of alloy powder raw materials. The storage bin capacity of the first-stage batching container is larger than that of the second-stage batching container.

[0049] The first stage is provided with a circular feeding port at the top (with a quick-release sealing cover), and the second stage is provided with a transparent observation window on the side (with scale lines).

[0050] The first stage serves as a raw material buffer bin, and a single feeding can meet the demand for continuous production for 2 hours; the second stage monitors the material level through the scale of the observation window. When the material level is lower than the lower limit (such as 0.2m), the gate valve is opened to replenish materials from the first stage.

[0051] Differentiated capacity design: The large capacity of the first stage reduces the frequency of manual feeding (the traditional single-stage hopper needs to be fed every 30 minutes, now it is changed to once every 2 hours), reducing the labor intensity by 60%; the small capacity of the second stage, combined with the observation window, is convenient for real-time monitoring of the batching progress.

[0052] Stainless steel material: Corrosion-resistant, avoiding oxidation and caking of alloy powder materials, and prolonging the service life compared with traditional carbon steel hoppers.

[0053] Furthermore, the synchronous speed regulation unit further includes an emergency braking module. When the feedback signal from the speed detection module continuously drops below the set threshold for more than 3 seconds, the drive module immediately cuts off the power supply of the drive motor.

[0054] When the cored wire breaks or slips severely, resulting in a sudden drop in the rotational speed of the driven wheel, the output voltage of the tachogenerator < 3V, the frequency converter stops outputting, and the belt motor is brake-braked.

[0055] Dual protection mechanism: Through voltage threshold detection + time delay determination, it avoids accidental interference from false triggering, improves the response speed compared with traditional pure mechanical limit switches, can emergency stop when the material leakage amount < 0.5 kg, and reduces raw material waste.

[0056] Furthermore, a method for using a multi-material feeding device based on synchronous speed regulation S1: Load various raw materials into the independent storage bins of the first-stage feeding container respectively, and adjust the flow rate of the raw materials flowing into the second-stage feeding container through the flow control mechanism; S2: At each feeding outlet of the second-stage feeding container, manually or automatically calibrate the opening degree of the flow regulating valve, so that each raw material is output to the belt conveyor according to the preset ratio; S3: Start the belt conveyor, and use the speed detection module to detect the rotational speed of the driven wheel in real time, generating a feedback signal corresponding to the actual running speed of the cored wire; S4: Convert the feedback signal into a speed regulation command through the signal processing module, and the drive module controls the drive motor of the belt conveyor according to the speed regulation command, so that the running speed of the belt conveyor is synchronized with the main machine of the cored wire.

[0057] S1 Raw material loading and rough adjustment: Open the first-stage feeding port cover, pour alloy powders A, B, and C into the corresponding storage bins respectively, and close the sealing cover; according to experience, adjust the gate valve to 70% opening, so that the second-stage material level rises to the middle line of the observation window (about 0.4 m).

[0058] S2 Valve calibration: Manually adjust the valves at each feeding outlet to the 5th level of opening, start the belt conveyor (speed set to 5 m / min), weigh the materials after receiving them in three containers for 1 minute (such as 3 kg of material A, 2 kg of material B, 1 kg of material C, target ratio 5:3:2), calculate the deviation and then adjust the valves to the 8th level (for material A), 6th level (for material B), 4th level (for material C), and repeat until the error ≤ 2%.

[0059] S3 - S4 Synchronous operation: After the host starts, the driven wheel drives the tachogenerator to output a voltage (for example, when the host speed is 8 m / min, it outputs 40 V). After rectification and voltage regulation, it becomes an 8 V DC signal. The frequency converter controls the belt motor to run at 40 HZ (corresponding to a speed of 8 m / min) to achieve synchronization.

[0060] Causal logic: Through the hierarchical control of "coarse adjustment of the feeding amount (gate valve) + fine adjustment of the ratio (outlet valve)", combined with the actual weighing and calibration of the belt conveyor for receiving materials, it is ensured that multiple raw materials are accurately output according to the preset ratio, solving the randomness problem of traditional manual adjustment.

[0061] The closed-loop control chain of driven wheel speed measurement → real-time voltage signal → frequency converter speed regulation makes the belt speed always follow the actual speed of the host (not the theoretical speed of the motor), eliminating mechanical transmission lag, and the synchronous response time < 0.2 seconds.

[0062] Further, the opening calibration of the flow regulating valve in step S2 includes: When the core wire host is not started, manually adjust each flow regulating valve to the initial opening; Start the belt conveyor and collect the raw materials output from each cloth outlet, weigh them and compare with the preset ratio; Repeat adjusting the opening of the flow regulating valve until the actual output ratio error ≤ 2%, lock the valve opening and record it.

[0063] Initial adjustment: According to the difference in raw material fluidity (for example, material A has fine particle size and good fluidity, and the initial opening is set to level 4; material B has coarse particle size and is set to level 6), avoid excessive or too small flow during the first trial of materials.

[0064] Weighing and comparison: Use an electronic scale (accuracy ±10 g) to weigh the receiving container, calculate the actual flow rate (for example, 2.8 kg of material A flows out in 1 minute, the target is 3 kg, and the deviation is -6.7%), and adjust according to the flow rate increment of 0.5 kg corresponding to each level of opening (adjust from level 4 to level 5, the flow rate increases by 0.5 kg, approaching the target value).

[0065] Locking and recording: After calibration, mark at the connection between the valve knob and the valve body, and record the scale of each valve on the equipment operation panel (for example, material A is at level 8, material B is at level 6, and material C is at level 4), which is convenient for quick reuse during the next production.

[0066] Quantitative calibration process: Through the iterative optimization of "setting - testing - adjustment", the ratio error is reduced to meet the strict process requirements of high-end core wires (such as precision alloy core wires for aviation).

[0067] Scale reuse mechanism: Avoid the time-consuming of repeated calibration, improve the production efficiency of product changeover, especially suitable for the production scenario of multiple varieties and small batches.

[0068] Further, the conversion process of the signal processing module in step S4 includes: Converting the three-phase AC signal output by the tachogenerator into a DC signal through a full-wave rectifier circuit; Inputting the adjusted DC signal into the frequency converter to control the stepless speed regulation of the driving motor of the belt conveyor.

[0069] Full-wave rectification: The three-phase alternating current (U, V, W) output by the tachogenerator is connected to the rectifier bridge, converted into pulsating direct current through 6 diodes, and then filtered by a 200 μF capacitor to output a smooth DC voltage (for example, when inputting 30V AC, the output is about 30V DC).

[0070] Stepwise voltage regulation: The first potentiometer (50KΩ) attenuates the 0 - 50V DC signal to 0 - 10V (for example, when inputting 30V DC, it is adjusted to 6V) to adapt to the analog input range (0 - 10V) of the frequency converter; The second potentiometer (10KΩ) adjusts the signal to 0 - XV (for example, if the maximum belt speed is set to 8m / min, then XV = 8V) according to the maximum belt speed (such as 10m / min corresponding to 10V) to avoid overspeed operation.

[0071] Frequency converter control: The Siemens MM440 frequency converter receives a 0 - 8V signal, outputs a frequency of 0 - 40HZ (1HZ corresponds to 0.25m / min), and controls the stepless adjustment of the motor speed within the range of 0 - 1000rpm.

[0072] Further, it also includes an emergency control step: When the speed detection module detects that the rotational speed of the driven wheel is lower than 50% of the set threshold for more than 5 seconds, or detects that the rotational speed is zero, the drive module immediately cuts off the power supply of the belt conveyor; At the same time, close the flow regulating valve to make the belt conveyor stop running completely within 2 seconds to prevent raw material leakage.

[0073] Multi-condition trigger mechanism: Combining the dual judgments of speed threshold + duration reduces false alarms (such as short-term jitters do not trigger shutdown), and at the same time ensures a quick response in case of real anomalies (the total time from detection to shutdown ≤ 2 seconds), saving more than 90% of the time compared to traditional manual intervention.

[0074] Mechanical and electrical linkage shutdown: The power-off of the motor and the closing of the valve are executed synchronously, providing double insurance to prevent material leakage, meeting the safety specification requirements of the metallurgical industry.

[0075] The above are only the preferred embodiments of the invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-material feeding device based on synchronous speed regulation, characterized in that Including: Raw material distribution unit: It includes two - stage sealed cloth - feeding containers, namely the first - stage cloth - feeding container and the second - stage cloth - feeding container. Both of the two cloth - feeding containers are provided with corresponding multiple independent storage bins. The lower end of the first - stage cloth - feeding container is connected to the second - stage cloth - feeding container through a flow - control mechanism. The second - stage cloth - feeding container is provided with multiple independently adjustable cloth - discharging outlets, and each cloth - discharging outlet is provided with a flow - regulating valve. Conveying unit: It includes a belt conveyor directly docked with the cloth - discharging outlet of the second - stage cloth - feeding container. The conveying surface of the belt conveyor is closely attached to the lower part of the cloth - discharging outlet. The belt conveyor also includes a driving wheel and a driven wheel. Synchronous speed - regulation unit: It includes a speed - detection module, a signal - processing module, and a driving module. The speed - detection module is coaxially connected to the driven wheel, and it real - time detects the actual running speed of the cored wire and generates a feedback signal. The signal - processing module converts the feedback signal into a speed - regulation instruction. The driving module is connected to the driving wheel and controls the driving motor of the belt conveyor to run synchronously with the cored - wire main machine according to the speed - regulation instruction.

2. The multi-material fabricating device based on synchronous speed regulation according to claim 1, wherein: The flow - control mechanism includes a gate valve and a sealing flange. The gate valve is used to regulate the raw - material flow from the first - stage cloth - feeding container to the second - stage cloth - feeding container. The sealing flange is fastened by rubber gaskets and bolts to prevent dust leakage.

3. The multi-material cloth feeding device based on synchronous speed regulation according to claim 1, wherein: The multiple cloth - discharging outlets of the second - stage cloth - feeding container are arranged at equal intervals along the conveying direction of the belt conveyor. The flow - regulating valve of each cloth - discharging outlet adjusts the opening degree through a manual knob or electric control, and the opening - degree value is visualized through scale markings.

4. A multi-material fabricating device based on synchronous speed regulation according to claim 1, wherein: The speed - detection module is a three - phase AC tachogenerator. Its rotor is coaxially fixed to the driven wheel through a coupling, and its stator is installed on the cored - wire main - machine frame through a rigid bracket.

5. A multi-material fabricating device based on synchronous speed regulation according to claim 1, characterized in that: The number of independent storage bins of both the first - stage cloth - feeding container and the second - stage cloth - feeding container is 3, which are respectively used to store different types of alloy - powder raw materials. The storage - bin capacity of the first - stage cloth - feeding container is larger than that of the second - stage cloth - feeding container.

6. The multi-material cloth-feeding device based on synchronous speed regulation according to claim 1, wherein: The synchronous speed - regulation unit also includes an emergency - braking module. When the feedback signal from the speed - detection module continuously drops below the set threshold for more than 3 seconds, the driving module immediately cuts off the power supply of the driving motor.

7. A usage method of a multi - raw - material cloth - feeding device based on synchronous speed - regulation, which is applied to a multi - raw - material cloth - feeding device based on synchronous speed - regulation according to any one of claims 1 - 6, characterized in that: S1: Load various raw materials into the independent storage bins of the first - stage cloth - feeding container respectively, and adjust the flow of the raw materials flowing into the second - stage cloth - feeding container through the flow - control mechanism. S2: At each cloth - discharging outlet of the second - stage cloth - feeding container, manually or automatically calibrate the opening degree of the flow - regulating valve so that each raw material is output to the belt conveyor according to a preset ratio. S3: Start the belt conveyor, and real - time detect the rotation speed of the driven wheel through the speed - detection module to generate a feedback signal corresponding to the actual running speed of the cored wire. S4: Convert the feedback signal into a speed - regulation instruction through the signal - processing module, and the driving module controls the driving motor of the belt conveyor according to the speed - regulation instruction to make the running speed of the belt conveyor synchronous with the cored - wire main machine.

8. The usage method of a multi-material cloth feeding device based on synchronous speed regulation according to claim 7, characterized in that: The calibration of the opening degree of the flow - regulating valve in S2 includes: When the cored - wire main machine is not started, manually adjust each flow - regulating valve to the initial opening degree. Start the belt conveyor and collect the raw materials output from each cloth outlet. After weighing, compare with the preset ratio. Repeat to adjust the opening of the flow regulating valve until the actual output ratio error ≤ 2%. Lock the valve opening and record it.

9. The usage method of a multi-material cloth feeding device based on synchronous speed regulation according to claim 7, characterized in that: The conversion process of the signal processing module in S4 includes: Convert the three-phase AC signal output by the tachogenerator into a DC signal through a full-wave rectifier circuit; Input the adjusted DC signal into the frequency converter to control the stepless speed regulation of the driving motor of the belt conveyor.

10. The usage method of a multi-material fabricating device based on synchronous speed regulation according to claim 7, characterized in that: It also includes an emergency control step: When the speed detection module detects that the rotational speed of the driven wheel is lower than 50% of the set threshold for more than 5 seconds continuously, or detects that the rotational speed is zero, the driving module immediately cuts off the power supply of the belt conveyor; At the same time, close the flow regulating valve to make the belt conveyor stop running completely within 2 seconds to prevent raw material leakage.

Images