Anti-bridging device for screw feeding hopper
By installing sensors and a motor-driven anti-blocking rod on the feeding hopper, the problem of bridging in the feeding hopper was solved, achieving stable operation of the feeding hopper and efficient monitoring of the equipment, and simplifying the operation process.
Patent Information
- Application Number
- CN202421696456.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-07-18
AI Technical Summary
In existing technologies, bridging is prone to occur in the feeding hopper, leading to unstable experiments and equipment damage. Furthermore, conventional anti-bridging monitoring systems have limited installation or shortened lifespan.
It employs a monitoring system and a blockage elimination system, including sensors, a motor-driven blockage elimination rod, and an observation window. The sensors monitor the material condition, the motor drives the blockage elimination rod to eliminate bridging, and the observation window and handle facilitate operation.
It effectively reduces bridging in the feeding hopper, improves experimental stability, simplifies operation, extends equipment lifespan, and reduces manpower and material consumption.
Smart Images
Figure CN223493817U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material conveying and detection technology, and in particular to a screw feeder anti-bridging device. Background Technology
[0002] For continuous production or testing, extruder screws often have a feed hopper installed at the inlet end. The feed hopper is a component for storing raw materials, and its shape is generally cylindrical at the top, conical in the middle, or cylindrical at the bottom. The slope of the conical surface of the feed hopper exhibits different flow characteristics for raw materials with different particle sizes, shapes, friction coefficients, and adhesion coefficients.
[0003] Raw materials enter the extruder screw through the feed inlet of the hopper. Near the feed inlet of the extruder, the diameter of the hopper gradually decreases, and the L / D ratio changes too rapidly. This causes the material to form an open bridge at the small conical orifice, which can support the material above it. This bridge prevents the raw material from entering the extruder. Bridging is more likely to occur with larger particles, irregular shapes, or materials with low bulk density. Bridging necessitates frequent monitoring of the feed and manual deblocking by researchers. However, bridging often occurs at the bottom of the feed hopper, making it difficult to detect promptly and causing significant fluctuations in the experiment. In severe cases, it can lead to experimental failure and equipment damage, consuming substantial human and material resources.
[0004] Conventional external vibration-based bridge breaking methods are limited by the small size of the screw detection equipment, restricting the installation of vibration devices. Furthermore, the intense vibrations also hinder the normal operation of the experimental testing. In addition, conventional anti-bridging monitoring systems often install sensors on the side of the easily clogged section. However, because the feed inlet pipe or its extension pipe has a large L / D ratio, comprehensive monitoring of the easily clogged section requires multiple detectors, resulting in equipment redundancy. Moreover, the lower part of the easily clogged section is close to the high-temperature screw, and bottom-side installation may shorten the sensor's lifespan. Therefore, a new technical solution is urgently needed to solve at least one of these technical problems. Summary of the Invention
[0005] In view of the above shortcomings, the purpose of this utility model is to provide a screw feed hopper anti-bridging device, which solves the technical problems of poor anti-clogging effect, inadequate monitoring and complicated operation of the prior art, and reduces the bridging phenomenon of the feed hopper.
[0006] To achieve the above-mentioned technical objectives and meet the above-mentioned technical requirements, the technical solution adopted by this utility model is as follows:
[0007] A screw feed hopper anti-bridging device, characterized in that it comprises:
[0008] The monitoring system includes a sensor for sensing the material conveying status inside the extruder, a sensing circuit electrically connected to the sensor, a sensing signal receiver electrically connected to the sensing circuit, and a controller electrically connected to the sensing signal receiver.
[0009] The anti-clogging system includes a motor with an output shaft mounted on the upper side of the material cover, an anti-clogging rod mounted on one end of the output shaft, the anti-clogging rod having a hollow cavity extending through it axially, the sensing circuit passing through the hollow cavity, the sensor being mounted in the hollow cavity, the feeding hopper being connected to the extruder, and the material cover being detachably mounted on the upper side of the feeding hopper.
[0010] As a preferred technical solution, a guide rod is installed inside the hollow cavity, the guide rod is sleeved on the sensing circuit, the motor is fixedly provided with a support structure, and a conductive slip ring is provided on the side of the support structure away from the motor, the conductive slip ring being connected to the guide rod.
[0011] As a preferred technical solution, the unblocking rod is a vibrating rod.
[0012] As a preferred technical solution, the anti-blocking rod is a stirring rod, and multiple stirring blades are provided on the outer periphery of the stirring rod.
[0013] As a preferred technical solution, a lower observation window is provided on the lower outer periphery of the feeding hopper.
[0014] As a preferred technical solution, an upper observation window is provided on the upper side of the material cover.
[0015] As a preferred technical solution, two handles are symmetrically arranged on the upper side of the material cover.
[0016] As a preferred technical solution, the sensor is a capacitive proximity sensor.
[0017] As a preferred technical solution, the conductive slip ring is directly connected to the guide rod circuit.
[0018] As a preferred technical solution, the controller is a DCS distributed controller, and the motor is electrically connected to the DCS distributed controller.
[0019] As a preferred technical solution, the DCS distributed controller is electrically connected to an alarm, which is located on the outer periphery of the DCS distributed controller.
[0020] Compared with traditional technical solutions, the beneficial effects of this utility model are:
[0021] 1) When material bridging occurs, the sensor will transmit a signal to the controller, which will control the motor to perform stirring, significantly reducing bridging of low-density materials, ensuring high efficiency of the experiment, good monitoring effect, and simple and efficient operation.
[0022] 2) The guide rod facilitates the threading of sensor circuits and serves as a guide for clustering;
[0023] 3) The stirring rod stirs the material through the stirring blades, thus preventing blockage;
[0024] 4) The lower observation window allows experimenters to observe the condition of the lower part of the feeding hopper at any time, so as to deal with it in a timely manner;
[0025] 5) The upper observation window allows experimenters to easily observe the condition of the feeding hopper and whether the anti-blocking rod is damaged;
[0026] 6) Two handles facilitate the handling and installation of the material cover by laboratory personnel;
[0027] 7) The DCS distributed controller is connected to the alarm, which can monitor the material status and sound an alarm at any time. After hearing the alarm, the experimental personnel can promptly observe the operation of the device. Attached Figure Description
[0028] Figure 1 A structural diagram of a device provided in one embodiment of this utility model;
[0029] Figure 2 This is a structural diagram of the anti-clogging method provided in one embodiment of the present invention;
[0030] Figure 3 This is a structural diagram of a feeding hopper provided in one embodiment of the present invention.
[0031] exist Figures 1-3 In the middle, 1. Sensor; 2. Sensing circuit; 3. Sensing signal receiver and responder; 4. Controller; 5. Alarm; 6. Motor; 7. Material cover; 8. Anti-blocking rod; 801. Hollow cavity; 9. Extruder; 10. Lower observation window; 11. Agitator blade; 12. Handle; 13. Upper observation window; 14. Guide rod; 15. Feed hopper; 16. Conductive slip ring; 1601. Support structure. Detailed Implementation
[0032] The present invention will now be further described with reference to the accompanying drawings.
[0033] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "top," "bottom," "left," "right," "front," "rear," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0034] Please refer to Figures 1-3 An embodiment of this utility model provides a screw feeder anti-bridging device, including a monitoring system and an anti-clogging system. The monitoring system includes a sensor 1 for sensing the material conveying status inside the extruder 9, a sensing line 2 electrically connected to the sensor 1, a sensing signal receiver 3 electrically connected to the sensing line 2, and a controller 4 electrically connected to the sensing signal receiver 3. The anti-clogging system includes a motor 6 with an output shaft disposed on the upper side of the material cover 7, and an anti-clogging rod 8 disposed at one end of the output shaft. The anti-clogging rod 8 is provided with a hollow cavity 801 that passes through it axially. The sensing line 2 passes through the hollow cavity 801, and the sensor 1 is disposed in the hollow cavity 801. The feeder 15 is connected to the extruder 9, and the material cover 7 is detachably disposed on the upper side of the feeder 15.
[0035] Sensor 1 senses the material condition at the bottom of the feeding hopper 15 and transmits the monitored material signal to the sensor signal receiver 3. Then, the sensor signal receiver 3 transmits the processed signal to the controller 4. The controller 4 controls the motor 6 to work according to the monitored material condition. In the event of material bridging, the controller 4 controls the motor 6 to perform a stirring operation, which significantly reduces the bridging phenomenon of low-density materials, ensuring the high efficiency of the experiment. The operation is simple and efficient. Sensor 1 is installed in the hollow cavity 801, which provides good monitoring effect. Sensor 1 is not easily damaged and does not need to be installed inside the feeding hopper 15 or the extruder 9. Installation and maintenance are relatively convenient.
[0036] like Figures 1-3 As shown, a guide rod 14 is installed inside the hollow cavity 801. The guide rod 14 is sleeved on the sensing circuit 2. The sensor 1 is installed on the guide rod 14 by threaded connection or plug-in connection. The guide rod 14 facilitates the threading of the sensing circuit 2 and plays the role of guiding and clustering.
[0037] like Figures 1-3As shown, the anti-blocking rod 8 is a vibrating rod. When the anti-blocking rod 8 is a vibrating rod, the motor 6 drives the vibrating rod to vibrate. The vibrating rod eliminates blockage through vibration. The vibrating rod is suitable for feeding systems of materials with larger particle sizes. The vibrating rod adopts a common structure, which will not be described in detail.
[0038] like Figures 1-3 As shown, the anti-blocking rod 8 is a stirring rod, and multiple stirring blades 11 are provided on the outer periphery of the stirring rod. The stirring rod stirs the material through the stirring blades 11, which plays the role of anti-blocking. The stirring rod is suitable for powder feeding systems.
[0039] like Figures 1-3 As shown, a lower observation window 10 is provided on the lower outer periphery of the feeding hopper 15. The lower observation window 10 allows the experimenter to observe the condition of the lower part of the feeding hopper 15 at any time so as to deal with it in a timely manner.
[0040] like Figures 1-3 As shown, an upper observation window 13 is provided on the upper side of the material cover 7. The upper observation window 13 makes it easy for the experimenter to observe the condition of the feeding hopper 15 and whether the anti-blocking rod 8 is damaged.
[0041] like Figures 1-3 As shown, two handles 12 are symmetrically arranged on the upper side of the material cover 7, which facilitates the handling and installation of the material cover 7 by the experimental personnel.
[0042] like Figures 1-3 As shown, sensor 1 is a capacitive proximity sensor, which is highly sensitive.
[0043] like Figures 1-3 As shown, a support structure 1601 is fixedly installed on the housing of the motor 6. A conductive slip ring 16 is provided on the side of the support structure 1601 away from the motor 6. The conductive slip ring 16 is connected to the guide rod 14 and is also connected to the sensing line 2 inside the guide rod 14, which avoids the occurrence of wire winding. The use of the conductive slip ring 16 can fix the position of the guide rod 14 on the one hand, and ensure that the sensing line 2 maintains normal communication even if the guide rod 14 rotates.
[0044] like Figures 1-3 As shown, the controller 4 is a DCS distributed control system (DCS). The motor 6 is electrically connected to the DCS. Furthermore, the DCS is electrically connected to an alarm 5, which is located on the outer periphery of the DCS. The DCS allows for real-time monitoring of material conditions and triggering of alarms, enabling personnel to promptly observe the device's operation upon hearing the alarm. Both the software and hardware of the signal control unit in the controller 4 incorporate time delays to minimize short-term system misjudgments and reduce frequent responses from the alarm 5 and the motor 6.
[0045] The monitoring range of the capacitive proximity sensor 1 is adjustable. When the monitoring distance exceeds a certain value, the sensor 1 receives a signal, and the receiver 3 sends a signal to trigger the alarm 5, thereby reminding the experimenter to closely monitor the feeding situation and prevent further escalation. Additionally, the monitoring signal, after conversion, can be viewed on a computer in real time. Furthermore, the monitoring system and anti-clogging system can be equipped with automatic / manual mode switching functions as needed, allowing conversion to manual button control mode. In special circumstances (such as the residual material discharge stage at the end of the experiment), the monitoring system and anti-clogging system can be manually started and stopped. The motor 6 is equipped with an overload protection function as required. When the torque of the stirring rod is too high, the overload protection function of the motor 6 automatically activates to prevent the motor 6 from stalling. Further details are omitted.
[0046] Any numerical values cited herein include all values ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values listed between the minimum and maximum values are similarly explicitly stated in this specification.
[0047] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.
[0048] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.
[0049] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.
[0050] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed utility model subject matter.
Claims
1. A screw feed hopper anti-bridging device, characterized in that, include: The monitoring system includes a sensor for sensing the material conveying status inside the extruder, a sensing circuit electrically connected to the sensor, a sensing signal receiver electrically connected to the sensing circuit, and a controller electrically connected to the sensing signal receiver. The anti-clogging system includes a motor with an output shaft mounted on the upper side of the material cover, an anti-clogging rod mounted on one end of the output shaft, the anti-clogging rod having a hollow cavity extending through it axially, the sensing circuit passing through the hollow cavity, the sensor being mounted in the hollow cavity, the feeding hopper being connected to the extruder, the material cover being detachably mounted on the upper side of the feeding hopper, and the motor being electrically connected to the controller.
2. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, A guide rod is installed inside the hollow cavity and is sleeved on the sensing circuit. The motor is fixedly provided with a support structure. A conductive slip ring is provided on the side of the support structure away from the motor and is connected to the guide rod.
3. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, The unblocking rod is a vibratory rod.
4. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, The anti-blocking rod is a stirring rod, and multiple stirring blades are provided on the outer periphery of the stirring rod.
5. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, A lower observation window is provided on the lower outer periphery of the feeding hopper.
6. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, An observation window is provided on the upper side of the material cover.
7. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, Two handles are symmetrically arranged on the upper side of the material cover.
8. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, The sensor is a capacitive proximity sensor.
9. The anti-bridging device for screw feed hopper according to claim 1, characterized in that, The controller is a DCS distributed controller, and the motor is electrically connected to the DCS distributed controller.
10. The anti-bridging device for screw feed hopper according to claim 9, characterized in that, The DCS distributed controller is electrically connected to an alarm, which is located on the outer periphery of the DCS distributed controller.