Rubber clamping detection device for lower top peg of internal mixer

Abstract

The utility model relates to the technical field of internal mixer equipment, in particular to an internal mixer lower top peg glue clamping detection device which comprises a detection module, a control unit and an execution mechanism. The detection module collects temperature and position information of the lower top peg through a temperature sensor and a displacement sensor, the control unit analyzes data through a logic controller and judges the glue clamping state, and the execution mechanism controls the lower top peg to act through a hydraulic driving assembly and an electromagnetic valve. According to the device, the audible and visual alarm prompts an operator to deal with the adhesive clamping problem in time, the equipment sealing structure is effectively protected, the service life is prolonged, the maintenance cost is reduced, and meanwhile the production efficiency is improved. The device is compact in structure, convenient to mount and suitable for various internal mixer equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of rubber processing equipment, specifically a rubber jamming detection device for the bottom bolt of an internal mixer. Background Technology

[0002] During the mixing process in an internal mixer, the operation of the bottom jack has a significant impact on equipment operation and product quality. Because the material is subjected to intense shearing, compression, and agitation within the mixer chamber, the bottom jack must be opened to discharge the material after mixing, and then closed for the next batch of mixing. However, in actual production, the bottom jack frequently jams. If jamming occurs and the bottom jack is closed using the conventional method, the rubber compound will be forcibly compressed, potentially damaging the jack's sealing structure, affecting the mixer's sealing performance, and impacting the quality of subsequent batches, increasing the defect rate. Furthermore, cleaning a jammed bottom jack requires significant manpower and time, reducing production efficiency and increasing production costs.

[0003] A search revealed a vacuum mixer with publication number CN103552167B, published on May 4, 2016. This design, by installing a vacuum device above the mixing chamber, prevents harmful gases from escaping and causing pollution, and also prevents chemical raw materials from being oxidized by the outside air, ensuring the production of high-quality products. However, this design does not include a function to detect adhesive jamming at the bottom bolt, making it difficult to avoid equipment damage and product quality degradation caused by adhesive jamming under complex operating conditions.

[0004] A search revealed a tilting capping internal mixer with publication number CN110576526B, published on July 2, 2024. This design uses a hydraulic rod to push the mixing chamber horizontally outwards and a pneumatic rod to tilt the cap and lower the pressure plate, facilitating cleaning. While this design improves the ease of cleaning, its primary focus is on cleaning functionality, neglecting the detection and prevention of adhesive jamming at the bottom plug. Therefore, in actual production, the risk of equipment damage and reduced production efficiency due to adhesive jamming still exists.

[0005] The aforementioned problems indicate that traditional internal mixers currently on the market have certain limitations in dealing with the issue of rubber jamming at the bottom top plug. Therefore, this invention aims to provide a detection device for detecting whether the bottom top plug of an internal mixer is jammed and to prevent rubber material from sticking, thereby overcoming the shortcomings of existing technologies and providing a more intelligent, efficient, and adaptable solution to changing environments. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides a device for detecting adhesive jamming in the lower top bolt of an internal mixer. This device aims to solve the problems of equipment damage, reduced product quality, and decreased production efficiency caused by adhesive jamming in the lower top bolt during the production process. By introducing intelligent detection methods, the device monitors the status of the lower top bolt in real time, promptly detects and addresses adhesive jamming, thereby improving the safety and stability of equipment operation.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a device for detecting adhesive jamming at the bottom top bolt of an internal mixer, comprising a detection module, a control unit, and an actuator. The detection module is installed near the discharge port of the bottom top bolt of the internal mixer for collecting temperature and position information; the control unit is located outside the internal mixer and is connected to the detection module via a signal line; the actuator is connected to the drive device of the bottom top bolt of the internal mixer for controlling the opening or closing action of the bottom top bolt.

[0008] The detection module includes a temperature sensor and a displacement sensor. The temperature sensor is embedded in a groove on the surface of the lower top bolt, the depth of which matches the thickness of the temperature sensor to ensure that the surface of the temperature sensor is flush with the surface of the lower top bolt. The displacement sensor is fixedly mounted on the side wall of the lower top bolt, with its probe facing the direction of movement of the lower top bolt, and is used to detect whether the opening position of the lower top bolt is abnormal. The temperature sensor and the displacement sensor are respectively connected to the input terminal of the control unit via signal lines.

[0009] The control unit includes a logic controller and an alarm device. The logic controller has preset temperature thresholds and displacement ranges. When the detected data exceeds the preset range, the logic controller issues a command to control the actuator. The alarm device includes an audible and visual alarm, which is installed on the operation panel of the internal mixer and connected to the output of the logic controller to prompt the operator to intervene manually.

[0010] The actuator includes a hydraulic drive assembly and a solenoid valve. The hydraulic drive assembly is bolted to the drive shaft of the lower top bolt of the internal mixer, and its inlet and outlet are connected to the main oil circuit of the hydraulic system via oil pipes. The solenoid valve is installed in the oil circuit of the hydraulic drive assembly, and its control terminal is connected to the output terminal of the logic controller via a signal line. When the logic controller determines that the rubber is stuck, the solenoid valve switches to the open position, keeping the lower top bolt open and preventing the rubber material from being forcibly squeezed.

[0011] The temperature sensor is a non-contact infrared temperature sensor, which works based on the energy changes of infrared radiation and can quickly respond to temperature anomalies. The displacement sensor is a magnetostrictive displacement sensor, whose probe detects the displacement of the lower bolt by changes in the magnetic field, and features high accuracy and strong anti-interference ability.

[0012] The logic controller is a programmable logic controller (PLC), whose internal program analyzes temperature and displacement data in real time according to a set algorithm. When the temperature sensor detects an abnormal increase in local temperature that lasts for more than a preset value, and the displacement sensor detects that the opening position of the lower top bolt deviates from the normal range, the logic controller determines that the sealant is stuck and sends a command to the solenoid valve through its output terminal.

[0013] The hydraulic drive assembly includes a hydraulic cylinder and a piston rod. The hydraulic cylinder is fixed to the frame of the internal mixer via a flange, and its piston rod is connected to the drive shaft of the lower jack via a pin. The solenoid valve is a two-position three-way solenoid valve, with its inlet connected to the main oil circuit of the hydraulic system and its outlet connected to the front and rear chambers of the hydraulic cylinder, respectively. The opening or closing action of the lower jack is achieved by switching the direction of the oil circuit.

[0014] The audible and visual alarm includes a buzzer and an LED light. The buzzer is installed inside the housing of the alarm device, and its sound frequency is adjusted by a logic controller. The LED light is installed on the front panel of the alarm device, and its color is divided into red and yellow according to the alarm level, corresponding to emergency alarm and early warning status, respectively.

[0015] The temperature sensor is installed as follows: a hole is drilled along the axial direction on the surface of the lower top bolt, the hole diameter matching the outer diameter of the temperature sensor. The temperature sensor is then inserted into the hole and secured with threads. The displacement sensor is installed as follows: a mounting bracket is welded to the side wall of the lower top bolt, and mounting holes are made on the bracket. The displacement sensor is fixed to the bracket with bolts, its probe facing the direction of movement of the lower top bolt.

[0016] This invention offers the following advantages: Real-time monitoring of the lower jack's status is achieved through the coordinated action of a temperature sensor and a displacement sensor. When an abnormal temperature increase and displacement deviate from the normal range are detected, the logic controller automatically identifies it as a stuck state and controls the hydraulic drive assembly via a solenoid valve to keep the lower jack open, preventing the adhesive from being forcibly squeezed. This design effectively protects the lower jack's sealing structure, extends the equipment's service life, and reduces maintenance costs.

[0017] Furthermore, the audible and visual alarms allow operators to promptly clear jammed glue, reducing downtime and improving production efficiency. The unique layout of the temperature and displacement sensors ensures accurate data acquisition, while the intelligent algorithm of the logic controller enhances the accuracy of judgments, preventing false alarms and missed alarms.

[0018] The combination of hydraulic drive components and solenoid valves simplifies the movement control process of the lower jack, enhancing the system's stability and reliability. The overall device has a compact structure, is easy to install, and is suitable for various types of internal mixers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a detailed diagram showing the installation of the detection module;

[0021] Figure 3 This is a block diagram of the internal structure of the control unit;

[0022] Figure 4 A schematic diagram showing the connection between the hydraulic drive assembly and the solenoid valve of the actuator;

[0023] Figure 5 This is a structural diagram of the sound and light alarm.

[0024] Figure 6 This is a flowchart illustrating the process for detecting the adhesive residue on the lower top plug.

[0025] The attached figures are labeled as follows:

[0026] 1. Internal mixer; 2. Bottom bolt; 3. Detection module; 4. Temperature sensor; 5. Displacement sensor; 6. Control unit; 7. Logic controller; 8. Alarm device; 9. Audible and visual alarm; 10. Actuator; 11. Hydraulic drive assembly; 12. Solenoid valve; 13. Hydraulic cylinder; 14. Piston rod; 15. Fixed bracket. Detailed Implementation

[0027] This utility model provides a device for detecting adhesive jamming at the bottom top bolt of an internal mixer, which is described below in conjunction with the appendix. Figure 1 To be continued Figure 6 The specific embodiments of this utility model are described in detail below, along with the component reference numerals marked in the accompanying drawings. The device in this embodiment includes a detection module 3, a control unit 6, and an actuator 10. These components are connected via signal lines and mechanical structures to form a complete detection and control system, used to monitor the status of the lower top bolt 2 of the internal mixer 1 in real time and promptly address any jamming issues.

[0028] like Figure 1As shown, the detection module 3 is installed near the discharge port of the lower top bolt 2 of the internal mixer 1. Its main components are a temperature sensor 4 and a displacement sensor 5. The temperature sensor 4 is embedded in a groove on the surface of the lower top bolt 2. This groove is formed by drilling along the axial direction of the lower top bolt 2, and the diameter of the hole matches the outer diameter of the temperature sensor 4, ensuring that the surface of the temperature sensor 4 is flush with the surface of the lower top bolt 2 after insertion. This installation method avoids interference of the temperature sensor 4 with the surface structure of the lower top bolt 2, while ensuring the accuracy of temperature data acquisition. The temperature sensor 4 uses a non-contact infrared temperature sensor, which can quickly respond to changes in local temperature. The displacement sensor 5 is installed on the side wall of the lower top bolt 2 by a fixing bracket 15. The fixing bracket 15 is welded to the side wall of the lower top bolt 2 and the displacement sensor 5 is fixed to the bracket with bolts. Its probe faces the direction of movement of the lower top bolt 2 and is used to detect whether the opening position of the lower top bolt 2 is abnormal. The displacement sensor 5 uses a magnetostrictive displacement sensor, which has the characteristics of high precision and strong anti-interference ability. Its probe detects the displacement of the lower top bolt 2 by changes in magnetic field. Temperature sensor 4 and displacement sensor 5 are connected to the input terminal of control unit 6 via signal lines, and the collected data is transmitted to control unit 6 for processing.

[0029] Control unit 6 is located outside the internal mixer 1, and its internal structure is as follows: Figure 3 As shown, the system includes a logic controller 7 and an alarm device 8. The logic controller 7 is a programmable logic controller (PLC) with preset temperature thresholds and displacement ranges. When the temperature sensor 4 detects an abnormal increase in the local temperature of the lower top bolt 2 for a duration exceeding the preset value, the logic controller 7 records this abnormal data. Simultaneously, when the displacement sensor 5 detects that the opening position of the lower top bolt 2 deviates from the normal range, the logic controller 7 analyzes both sets of data to determine whether the current state is a jammed state. The output of the logic controller 7 is connected to the alarm device 8 and the actuator 10 via signal lines. When a jammed state is determined, the logic controller 7 issues a command to control the actuator 10 to operate and triggers the alarm device 8 to alert the operator. The alarm device 8 includes an audible and visual alarm 9, such as... Figure 5 As shown, the audible and visual alarm 9 is installed on the control panel of the internal mixer 1, and it contains a buzzer and an LED light. The buzzer adjusts its sound frequency according to the signal from the logic controller 7, and the LED light displays different colors according to the alarm level, with red corresponding to the emergency alarm state and yellow corresponding to the warning state.

[0030] Actuator 10 includes hydraulic drive assembly 11 and solenoid valve 12, such as Figure 4As shown, the hydraulic drive assembly 11 is bolted to the drive shaft of the lower top bolt 2 of the internal mixer 1. Its core components are the hydraulic cylinder 13 and the piston rod 14. The hydraulic cylinder 13 is fixed to the frame of the internal mixer 1 via a flange, and its piston rod 14 is connected to the drive shaft of the lower top bolt 2 via a pin, thereby controlling the opening and closing of the lower top bolt 2. The solenoid valve 12 is installed in the oil circuit of the hydraulic drive assembly 11. Its inlet is connected to the main oil circuit of the hydraulic system, and its outlet is connected to the front and rear chambers of the hydraulic cylinder 13, respectively. The solenoid valve 12 is a two-position three-way solenoid valve, and its control end is connected to the output end of the logic controller 7 via a signal line. When the logic controller 7 determines that the rubber is stuck, the solenoid valve 12 switches to the open state, keeping the piston rod 14 of the hydraulic cylinder 13 in the open state of the lower top bolt 2, preventing the rubber material from being forcibly squeezed and causing equipment damage.

[0031] Figure 2 The installation details of detection module 3 are shown. Temperature sensor 4 is fixed in a groove on the surface of the lower top bolt 2 by threads, ensuring the stability of temperature sensor 4. Displacement sensor 5 is mounted on the side wall of lower top bolt 2 by a fixing bracket 15. The mounting holes on the fixing bracket 15 are aligned with the bolt holes of displacement sensor 5, and it is firmly fixed to the bracket by bolts, ensuring that the probe faces the direction of movement of lower top bolt 2. This layout allows temperature sensor 4 and displacement sensor 5 to work together without interfering with each other during detection, while ensuring the accuracy of data acquisition.

[0032] Figure 6 This diagram illustrates the workflow for detecting the stuck state of the lower top bolt 2, detailing the process from data acquisition to logical judgment and action execution. First, temperature sensor 4 and displacement sensor 5 collect temperature and displacement data of the lower top bolt 2, respectively, and transmit the data to the logic controller 7 via signal lines. The logic controller 7 analyzes the data in real time according to its internal preset algorithm. When temperature sensor 4 detects an abnormal increase in local temperature that lasts longer than a preset value, and displacement sensor 5 detects that the opening position of the lower top bolt 2 deviates from the normal range, the logic controller 7 determines that the bolt is stuck. At this time, the logic controller 7 sends a command to the solenoid valve 12 through its output terminal. The solenoid valve 12 switches to the open state, keeping the piston rod 14 of the hydraulic cylinder 13 in the open state of the lower top bolt 2. Simultaneously, the logic controller 7 triggers the alarm device 8, and the audible and visual alarm 9 sounds and illuminates the LED light, prompting the operator to intervene manually. After the operator cleans the stuck bolt according to the alarm prompt, the logic controller 7 re-detects the temperature and displacement data. Once it confirms that the data has returned to normal, the alarm is deactivated and the lower top bolt 2 resumes normal operation.

[0033] In practical applications, the device of this invention is suitable for various types of internal mixers, and its compact structural design makes installation and maintenance more convenient. The unique layout of the temperature sensor 4 and displacement sensor 5 ensures the accuracy of data acquisition, while the intelligent algorithm of the logic controller 7 improves the accuracy of judgment and avoids false alarms and missed alarms. The cooperation between the hydraulic drive component 11 and the solenoid valve 12 simplifies the action control process of the lower top bolt 2 and enhances the stability and reliability of the system. Through the prompting function of the audible and visual alarm 9, operators can promptly clear the stuck glue, reduce downtime, and improve production efficiency. The overall device design fully considers the actual operating environment and requirements of the internal mixer 1.

[0034] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0035] First, during the mixing process in the internal mixer 1, after the materials have been mixed, the lower top plug 2 needs to be opened for discharge. At this stage, the temperature sensor 4 and displacement sensor 5 in the detection module 3 begin to operate. The temperature sensor 4 is embedded in a groove on the surface of the lower top plug 2, and monitors the local temperature changes on the surface of the lower top plug 2 in real time using a non-contact infrared thermometry principle. When the rubber compound adheres to the surface of the lower top plug 2, friction causes an abnormal increase in local temperature. The temperature sensor 4 transmits the collected temperature data to the logic controller 7 in the control unit 6 via a signal line. Simultaneously, the displacement sensor 5 detects whether the opening position of the lower top plug 2 deviates from the normal range using the magnetostrictive principle, and synchronously transmits the displacement data to the logic controller 7.

[0036] Secondly, the logic controller 7 performs a comprehensive analysis of temperature and displacement data based on an internally preset algorithm. For example, when the temperature sensor 4 detects that the local temperature of the lower top bolt 2 exceeds a preset threshold (e.g., 50°C) and the duration reaches a set value (e.g., 5 seconds), and at the same time, the displacement sensor 5 detects that the displacement of the lower top bolt 2 at the opening position exceeds the normal range (e.g., ±2mm), the logic controller 7 determines that the current state is a stuck state. This determination mechanism is based on multi-parameter collaborative analysis, which can effectively avoid misjudgment or missed judgment caused by fluctuations in a single parameter.

[0037] Subsequently, when the logic controller 7 determines that the rubber is stuck, its output sends a command to the actuator 10. Specifically, after receiving the signal from the logic controller 7, the solenoid valve 12 switches to the open state, keeping the piston rod 14 of the hydraulic cylinder 13 in the open state of the lower top bolt 2. The hydraulic drive assembly 11 is fixed to the frame of the internal mixer 1 via a flange, and its piston rod 14 is connected to the drive shaft of the lower top bolt 2 via a pin, thereby ensuring that the lower top bolt 2 remains in a stable open state and preventing the rubber material from being forcibly squeezed, which could damage the equipment. At the same time, the logic controller 7 triggers the alarm device 8, and the audible and visual alarm 9 emits a buzzer and illuminates an LED light, prompting the operator to intervene manually. The buzzer frequency and the LED light color are adjusted by the logic controller 7 according to the alarm level, with red corresponding to an emergency alarm state and yellow corresponding to a warning state.

[0038] Next, following the prompts from the audible and visual alarm 9, the operator cleaned the lower top bolt 2. After cleaning, the temperature sensor 4 and displacement sensor 5 re-collected data and transmitted the data to the logic controller 7. The logic controller 7 analyzed the newly collected data, and after confirming that the temperature and displacement of the lower top bolt 2 had returned to normal, it deactivated the alarm and restored the lower top bolt 2 to normal operation. This process ensured that the equipment could quickly resume production after the glue jamming problem was resolved, minimizing downtime.

[0039] Furthermore, the design of the hydraulic drive assembly 11 simplifies the motion control process of the lower jack 2. The two-position three-way solenoid valve 12 switches the oil circuit direction to change the pressure in the front and rear chambers of the hydraulic cylinder 13, thereby driving the piston rod 14 to open or close the lower jack 2. This design not only enhances the stability and reliability of the system but also improves the response speed, making the movement of the lower jack 2 more precise and controllable.

[0040] In summary, this invention achieves real-time monitoring of the lower top bolt 2's status through the coordinated operation of temperature sensor 4 and displacement sensor 5. The intelligent algorithm of logic controller 7 improves the accuracy of determining the stuck state through comprehensive analysis of multiple parameters. The cooperation between hydraulic drive component 11 and solenoid valve 12 simplifies the motion control process of the lower top bolt 2 and enhances system stability. The audible and visual alarm 9 provides timely alerts, allowing operators to clear stuck components promptly, reducing downtime and improving production efficiency. The overall device is compact and rationally designed, easy to install, and suitable for various types of internal mixers.

Claims

1. A device for detecting adhesive jamming at the bottom top bolt of an internal mixer, characterized in that: The device includes a detection module (3), a control unit (6), and an actuator (10). The detection module (3) is installed near the discharge port of the lower top bolt (2) of the internal mixer (1) to collect temperature and position information. The control unit (6) is located outside the internal mixer (1) and is connected to the detection module (3) via a signal line. The actuator (10) is connected to the drive device of the lower top bolt (2) of the internal mixer (1) to control the opening or closing action of the lower top bolt (2). The detection module (3) includes a temperature sensor (4) and a displacement sensor (5). The temperature sensor (4) is embedded in a groove on the surface of the lower top bolt (2), and the depth of the groove matches the thickness of the temperature sensor (4) to ensure that the surface of the temperature sensor (4) is flush with the surface of the lower top bolt (2). The displacement sensor (5) is fixedly installed on the side wall of the lower top bolt (2), and its probe faces the direction of movement of the lower top bolt (2).

2. The internal mixer bottom bolt jamming detection device according to claim 1, characterized in that: The temperature sensor (4) is a non-contact infrared temperature sensor; the displacement sensor (5) is a magnetostrictive displacement sensor.

3. The internal mixer bottom bolt jamming detection device according to claim 1, characterized in that: The control unit (6) includes a logic controller (7) and an alarm device (8). The logic controller (7) has a preset temperature threshold and displacement range. When the detected data exceeds the preset range, the logic controller (7) issues a command to control the actuator (10) to operate. The alarm device (8) includes an audible and visual alarm (9), which is installed on the operation panel of the internal mixer (1) and connected to the output of the logic controller (7).

4. The internal mixer bottom bolt jamming detection device according to claim 3, characterized in that: The audible and visual alarm (9) includes a buzzer and an LED light, which displays red or yellow depending on the alarm level.

5. The internal mixer bottom bolt jamming detection device according to claim 1, characterized in that: The actuator (10) includes a hydraulic drive assembly (11) and a solenoid valve (12). The hydraulic drive assembly (11) is fixed to the drive shaft of the top bolt (2) of the internal mixer (1) by bolts, and its oil inlet and outlet are connected to the main oil circuit of the hydraulic system through oil pipes. The solenoid valve (12) is installed on the oil circuit of the hydraulic drive assembly (11), and its control end is connected to the output end of the logic controller (7) through a signal line.

6. The internal mixer bottom bolt jamming detection device according to claim 5, characterized in that: The hydraulic drive assembly (11) includes a hydraulic cylinder (13) and a piston rod (14). The hydraulic cylinder (13) is fixed on the frame of the internal mixer (1) by a flange, and its piston rod (14) is connected to the drive shaft of the lower top bolt (2) by a pin. The solenoid valve (12) is a two-position three-way solenoid valve.

7. The internal mixer bottom bolt jamming detection device according to claim 1, characterized in that: The temperature sensor (4) is fixed in a groove on the surface of the lower top bolt (2) by a thread. The groove is formed by drilling along the axial direction of the lower top bolt (2), and the diameter of the hole matches the outer diameter of the temperature sensor (4). The displacement sensor (5) is installed on the side wall of the lower top bolt (2) by a fixing bracket (15). The fixing bracket (15) is welded to the side wall of the lower top bolt (2) and the displacement sensor (5) is fixed on the bracket by bolts.

8. The internal mixer bottom bolt jamming detection device according to claim 1, characterized in that: The detection module (3), control unit (6) and actuator (10) are connected by signal lines and mechanical structures to form a complete detection and control system.

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