Drive load monitoring material control device and polymer material pelletizer

Abstract

The utility model relates to material processing field especially drive load monitoring material control device and polymer material pelletizer, the device includes drive arrangement, starting device, current sensor, control loop, control unit and feeding device. Current sensor real -time monitoring drive motor's working current, control unit compares and contrasts with the current value that gathers with the preset threshold value, when the current value is in the setting time -length and falls in the amplitude more than the threshold value, judge as many root material strip fracture fault, immediately through control loop output signal, synchronous control feeding device stops feeding, starting device removes back safe position. The device constructs the quick, reliable under -load protection mechanism through current monitoring, solves the problem that the traditional single temperature monitoring is easy to lose effectiveness and leads to the material stacking, realizes double interlock protection, reduces the cleaning difficulty, improves production automation degree and reliability.

Description

Technical Field

[0001] This utility model relates to the field of material processing, and in particular to a drive load monitoring material control device and a polymer pelletizer. Background Technology

[0002] In the operation of the polymer pelleting system, the infrared temperature switch installed on the starting device plays a crucial role. This device is mainly used for real-time monitoring of the pellets during production. Its core working principle is that when an abnormality is detected in the pellets and the temperature exceeds the set value, an alarm mechanism is immediately triggered. This results in an interruption of material feeding, and the starting device automatically moves from the production position to the starting position, achieving interlocked shutdown, thereby preventing more serious production problems caused by pellet abnormalities to a certain extent.

[0003] However, in actual production scenarios, material bar fluctuations are quite frequent. Although in most cases the infrared temperature monitoring function can respond promptly to material bar anomalies and complete interlock shutdown operations, there are still a few special cases. Due to the uncertainty of the material bar stacking position and various interference factors that may exist in the production environment, the infrared temperature sensing function may fail. This failure directly leads to large-area material accumulation, and cleaning up these accumulations is not only difficult but also time-consuming, seriously affecting the continuity and efficiency of production, and causing unnecessary losses to the enterprise. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a drive load monitoring material control device, including a drive device, a starting device, a current sensor, a control circuit, a control unit, and a feeding device; The current sensor is electrically connected to the drive motor and is used to collect the operating current value of the drive motor in real time. The control circuit is electrically connected to the output terminal of the control unit, and the output terminal of the control circuit is respectively connected to the control terminal of the feeding device and the control terminal of the starting device. The control unit is electrically connected to the current sensor. When the current value collected by the current sensor is lower than the current setting threshold, the control unit outputs a control signal through the control loop to control the feeding device to stop feeding and control the starting device to move from the production position to the starting position.

[0005] Based on the above solution, it further includes an infrared temperature switch installed on the starting device. The infrared temperature switch is electrically connected to the control unit. When the infrared temperature switch detects an over-temperature signal, the control unit outputs a control signal through the control loop to control the feeding device to stop feeding and control the starting device to move from the production position to the starting position.

[0006] Based on the above scheme, the control unit further includes a pre-stored current setting threshold. The interlocking control signal is triggered only when the current value collected by the current sensor decreases by more than the current setting threshold within a set time period.

[0007] Furthermore, based on the above scheme, the threshold can be set and adjusted by the control unit.

[0008] In addition to the above solution, an alarm device is further included, which is electrically connected to the control unit.

[0009] Based on the above scheme, the control unit is further configured as a programmable logic controller, with its input port connected to the signal output terminal of the current sensor, and / or its input port connected to the infrared temperature switch, and its output port electrically connected to the control loop.

[0010] Based on the above scheme, further, the current sensor is a through-hole current sensor, and the driving device is a drive motor; One phase wire of the drive motor power line passes through the sensing hole of the through-type current sensor.

[0011] Based on the above scheme, the starting device further includes a guide plate, a guide trough, and a spraying device; the guide plate is arranged adjacent to the feeding device and is used to receive the extruded material strip; the inlet end of the guide trough is connected to the guide plate and is used to guide the material strip; the outlet of the spraying device is aligned with the guide plate and the guide trough and is used to spray cooling water.

[0012] This utility model also provides a polymer pelletizer, including a frame and a drive load monitoring and material control device as described above, wherein the starting device of the drive load monitoring and material control device is located above the frame.

[0013] Based on the above scheme, a waste bin is further included. When the starting device is moved to the starting position, the discharge end of the feeding device is directly opposite the inlet of the waste bin, which is used to receive and collect the material squeezed out from the feeding device after the machine stops.

[0014] Compared with existing technologies, the drive load monitoring and material control device provided by this utility model creatively introduces an underload protection mechanism based on a sudden current drop by monitoring the load current changes of the drive motor in real time. This device can accurately detect abnormal operating conditions caused by the simultaneous breakage of multiple polymer strips, resulting in a sudden drop in the operating current of the drive motor. Through the control unit, it quickly triggers interlocking control, which can greatly avoid large-area material accumulation accidents caused by monitoring failure. This fundamentally solves the problems of difficult and time-consuming cleaning, effectively reduces unplanned downtime and losses caused by material blockage during production, and significantly improves the automation level of the polymer pelletizing system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the drive load monitoring material control device provided by this utility model; Figure 2 A schematic diagram of the circuit connection of the drive load monitoring material control device provided by this utility model.

[0017] Figure label: 10 Drive device, 11 Start-up device, 12 Current sensor, 13 Control circuit, 14 Control unit, 15 Feeding device, 16 Guide plate, 17 Material guide chute, 18 Spraying device, 19 Frame, 20 Waste bin, 21 Production position, 22 Start-up position. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] To address the issue of existing infrared temperature sensing functions being prone to failure and resulting in large-area material accumulation, this utility model provides a solution... Figure 1-2 The shown is a drive load monitoring material control device.

[0021] The control device, such as Figure 1-2 As shown, it includes a drive device 10, a starting device 11, a current sensor 12, a control circuit 13, a control unit 14, and a feeding device 15; The current sensor 12 is electrically connected to the drive motor and is used to collect the operating current value of the drive motor in real time. The control circuit 13 is electrically connected to the output terminal of the control unit 14. The output terminal of the control circuit 13 is respectively connected to the control terminal of the feeding device 15 and the control terminal of the starting device 11. The control unit 14 is electrically connected to the current sensor 12. When the current value collected by the current sensor 12 is lower than the current setting threshold, the control unit 14 outputs a control signal through the control loop 13 to control the feeding device 15 to stop feeding and control the starting device 11 to move from the production position 21 to the starting position 22.

[0022] Specifically, during use, after the equipment is started normally, the molten polymer material is extruded from the feeding device 15 to form multiple strips, and the drive motor drives the cutter to run under load. Its working current is stable within a normal range. The control unit 14 continuously monitors the data transmitted from the current sensor 12 and compares it with the preset current threshold. The system maintains normal production status.

[0023] When an anomaly occurs during production, such as the sudden breakage of multiple material strips, the load on the cutter is instantly and drastically reduced, causing a sharp drop in the operating current of the drive motor. The current sensor 12 captures this sudden change in current value in real time and immediately transmits it to the control unit 14. The logic judgment program within the control unit 14 is quickly activated, and once it is confirmed that the current drop exceeds the preset safety threshold, it is immediately determined to be a material interruption fault. Subsequently, the control unit 14 sends control signals to the feeding device 15 and the starting device 11 simultaneously through the control loop 13, instructing the feeding device 15 to immediately stop working and interrupt the material supply; at the same time, it instructs the drive device 10 of the starting device 11 to operate, driving it from the production position 21 to the starting position 22.

[0024] Furthermore, it also includes an infrared temperature switch installed on the starting device 11. The infrared temperature switch is electrically connected to the control unit 14. When the infrared temperature switch detects an over-temperature signal, the control unit 14 outputs a control signal through the control circuit 13 to control the feeding device 15 to stop feeding and control the starting device 11 to move from the production position 21 to the starting position 22.

[0025] In the above scheme, an infrared temperature switch is added and electrically connected to the control unit 14, forming a dual interlocking protection mechanism. As an independent monitoring unit, the infrared temperature switch can directly and non-contactly detect the surface temperature of the material strip, effectively capturing localized overheating anomalies caused by material strip accumulation, poor flow, etc. When either the temperature signal or the current signal triggers a set threshold, the system will execute a shutdown protection action, thus forming two mutually redundant safety barriers.

[0026] Furthermore, the control unit 14 has a pre-stored current setting threshold. The interlock control signal is triggered only when the current value collected by the current sensor 12 decreases by more than the current setting threshold within a set time period. The threshold can be set and adjusted by the control unit 14.

[0027] For example, small fluctuations in current will not cause a shutdown. For instance, the current fluctuation range of the drive motor can be set to 1% to 10%, and the machine will not stop within this range.

[0028] By introducing a set-duration judgment mechanism, normal current fluctuations and real faults can be effectively distinguished, avoiding accidental shutdowns during production. This significantly improves the stability and continuity of equipment operation. The adjustable threshold function allows the device to flexibly adapt to different materials and operating conditions, greatly enhancing the system's adaptability and the flexibility of production scheduling.

[0029] Furthermore, it also includes an alarm device, which is electrically connected to the control unit 14, ensuring that the operator can respond immediately and shorten the fault handling time.

[0030] Furthermore, such as Figure 2 As shown, the control unit 14 is a programmable logic controller (PLC), whose input port is connected to the signal output terminal of the current sensor 12, and / or its input port is connected to the infrared temperature switch, and its output port is electrically connected to the control loop 13.

[0031] Furthermore, the current sensor 12 is a through-hole current sensor 12, and the driving device 10 is a drive motor; one phase wire of the power supply line of the drive motor is passed through the sensing hole of the through-hole current sensor 12. The non-contact measurement method of the through-hole current sensor 12 makes installation and modification simpler and safer, and completely avoids the risks that may be caused by the wiring of the main circuit.

[0032] Furthermore, such as Figure 1 As shown, the starting device 11 includes a guide plate 16, a guide trough 17, and a spraying device 18. The guide plate 16 is located adjacent to the feeding device 15 and is used to receive the extruded strip. The inlet end of the guide trough 17 is connected to the guide plate 16 and is used to guide the strip. The outlet of the spraying device 18 is aligned with the guide plate 16 and the guide trough 17 and is used to spray cooling water. The starting device 11, with its guide plate 16, guide trough 17, and spraying device 18, provides a reliable path for efficient cooling and stable forming of the molten strip, ensuring the quality of the pellets.

[0033] This utility model also provides a polymer pelletizer, such as... Figure 1 As shown, it includes a frame 19 and a drive load monitoring material control device as described above, wherein the starting device 11 of the drive load monitoring material control device is located above the frame 19.

[0034] This polymer pelletizer integrates the aforementioned control device into the entire pelletizer, forming a production unit with self-state perception and intelligent protection capabilities, which greatly improves the automation level of the equipment.

[0035] Furthermore, such as Figure 1 As shown, it also includes a waste bin 20. When the starting device 11 is moved to the starting position 22, the discharge end of the feeding device 15 is directly opposite the inlet of the waste bin 20, which is used to receive and collect the material squeezed out from the feeding device 15 after the machine stops.

[0036] In the above scheme, the remaining molten material briefly extruded from the feeding device 15 will fall directly into the dedicated waste bin 20 to avoid accumulating and solidifying near the guide chute 17 and the cutter. As a result, the operator can easily carry out cleaning and subsequent restart preparations, and the entire system can quickly and orderly enter a safe shutdown state.

[0037] Preferably, the feeding device is a die head.

[0038] Although this document frequently uses terms such as drive device, starting device, current sensor, control circuit, control unit, and feeding device, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A material control device for driving load monitoring, characterized in that: It includes a drive unit (10), a starting unit (11), a current sensor (12), a control circuit (13), a control unit (14), and a feeding device (15). The current sensor (12) is electrically connected to the driving device (10) and is used to collect the operating current value of the driving device (10) in real time; The control circuit (13) is electrically connected to the output terminal of the control unit (14). The output terminal of the control circuit (13) is connected to the control terminal of the feeding device (15) and the control terminal of the starting device (11) respectively. The control unit (14) is electrically connected to the current sensor (12). When the current value collected by the current sensor (12) is lower than the current threshold preset in the control unit (14), the control unit (14) outputs a control signal through the control loop (13) to control the feeding device (15) to stop feeding and control the starting device (11) to move from the production position (21) to the starting position (22).

2. The drive load monitoring material control device according to claim 1, characterized in that: It also includes an infrared temperature switch on the starting device (11), which is electrically connected to the control unit (14). When the infrared temperature switch detects an over-temperature signal, the control unit (14) outputs a control signal through the control loop (13).

3. The drive load monitoring material control device according to claim 1, characterized in that: The control unit (14) has a preset current threshold. The control signal is triggered only when the current value collected by the current sensor (12) decreases by more than the preset current threshold within a set time period.

4. The drive load monitoring material control device according to claim 3, characterized in that: The threshold can be set and adjusted by the control unit (14).

5. The drive load monitoring material control device according to claim 1, characterized in that: It also includes an alarm device, which is electrically connected to the control unit (14).

6. The drive load monitoring material control device according to claim 2, characterized in that: The control unit (14) is a programmable logic controller, whose input port is connected to the signal output terminal of the current sensor (12), and / or its input port is connected to the infrared temperature switch, and its output port is electrically connected to the control loop (13).

7. The drive load monitoring material control device according to claim 1, characterized in that: The current sensor (12) is a through-hole current sensor (12), and the driving device (10) is a drive motor; One phase of the power supply line of the drive motor is inserted through the sensing hole of the through-type current sensor (12).

8. The drive load monitoring material control device according to claim 1, characterized in that: The starting device (11) includes a guide plate (16), a guide trough (17), and a spraying device (18); the guide plate (16) is located adjacent to the feeding device (15) and is used to receive the extruded material strip; the inlet end of the guide trough (17) is connected to the guide plate (16) and is used to guide the material strip; the outlet of the spraying device (18) is aligned with the guide plate (16) and the guide trough (17) and is used to spray cooling water.

9. A polymer pelletizer, characterized in that: It includes a frame (19) and a drive load monitoring material control device as described in any one of claims 1-8, wherein the starting device (11) of the drive load monitoring material control device is located above the frame (19).

10. The polymer pelletizer according to claim 9, characterized in that: It also includes a waste bin (20), and when the starting device (11) is moved to the starting position (22), the discharge end of the feeding device (15) is directly opposite the inlet of the waste bin (20), which is used to receive and collect the material squeezed out from the feeding device (15) after the machine stops.

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