PVC compound recording device
Patent Information
- Application Number
- CN202522442484.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-18
AI Technical Summary
[0003]针对现有PVC混料机混料数据记录依赖人工，导致漏统计、错统计、耗时费力的问题，本实用新型提供了一种 PVC 混料记录装置，实现混料数据的自动采集、记录与分析，克服现有技术中PVC混料数据记录准确性差、效率低的缺陷，具体方案为：
为了更好地监控混料生产过程，本申请引入了无纸记录仪对混料过程温度、电流，混料时间，周期内混料锅数进行实时监控。具体为：
Smart Images
Figure CN224838976U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a PVC mixing and recording device, belonging to the technical field of PVC production equipment. Background Technology
[0002] In the PVC product manufacturing process, mixing is a key upstream process that determines the performance of the final product. This process typically relies on the combined use of a hot mixing pot and a cold mixing pot to mix materials. The quality of the mixed clinker directly determines the quality of the final product. Real-time temperature, real-time current, and mixing time of the hot and cold mixing pots are key parameters affecting the quality of the mixed clinker. While mainstream PVC mixing machines in the industry are equipped with basic temperature monitoring and motor drive functions, data recording during the mixing process still relies on manual operation. Operators must periodically observe the control cabinet instruments and manually record real-time temperatures of the hot and cold mixing pots, as well as motor current, start and end times for each pot, and the number of pots produced per shift. This method is not only time-consuming and labor-intensive but also prone to omissions and errors in data recording due to human negligence, severely impacting production efficiency and product quality stability. Utility Model Content
[0003] To address the problems of manual recording of mixing data in existing PVC mixing machines, which leads to omissions, errors, and time-consuming and labor-intensive statistics, this utility model provides a PVC mixing recording device that automatically collects, records, and analyzes mixing data. This overcomes the shortcomings of poor accuracy and low efficiency in existing PVC mixing data recording technologies. The specific solution is as follows: A PVC mixing and recording device, comprising: The data acquisition module includes a temperature acquisition unit and a current acquisition unit. The temperature acquisition unit is respectively installed in the hot mixing pot and the cold mixing pot of the PVC mixer to acquire the temperature of the hot mixing pot and the cold mixing pot in real time. The current acquisition unit is respectively connected to the power supply circuit of the drive motor of the hot mixing pot and the cold mixing pot to acquire the power supply current of the drive motor of the hot mixing pot and the cold mixing pot in real time. The paperless recorder is communicatively connected to the temperature acquisition unit and the current acquisition unit respectively. The paperless recorder receives and stores the real-time temperature and real-time current of the cold mixing pot and the hot mixing pot collected by the temperature acquisition unit and the current acquisition unit. The paperless recorder counts the number of mixing pots based on the start time and end time of the mixing of a single pot.
[0004] Preferably, the paperless recorder integrates a timing module and a counting module; The timing module is used to record the start and end times of a single batch mixing and to calculate the mixing time of a single batch. The counting module counts the number of production batches based on the mixing time.
[0005] Preferably, the timing module is a real-time clock chip, and the timing module triggers timing based on the temperature change curve of the hot mixing pot and the current change curve of the drive motor of the hot mixing pot.
[0006] Preferably, the temperature acquisition unit is a resistance temperature sensor, and at least two temperature acquisition units are provided; The probes of the two resistance temperature sensors extend into the interior of the hot mixing pot and the cold mixing pot, respectively, and are in contact with the corresponding materials in the pot, and are attached to the area in the pot where they are in contact with the materials.
[0007] Preferably, the current acquisition unit is a Hall current sensor; The Hall current sensors are connected in series in the power supply circuits of the drive motors for the hot mixing pot and the cold mixing pot, respectively.
[0008] Preferably, the paperless recorder is also equipped with a color display screen.
[0009] The beneficial effects of this application are as follows: To better monitor the mixing production process, this application introduces a paperless recorder to monitor the temperature, current, mixing time, and number of mixing batches within a cycle in real time. Specifically: In this application, temperature acquisition units are inserted into the hot and cold mixing pots respectively, directly contacting the materials. This allows for real-time capture of the actual temperature changes of the materials inside the pots, ensuring the accuracy of the hot and cold mixing temperature data and providing a precise basis for judging the degree of material mixing and maturation. Current acquisition units are connected in series to the power supply circuits of the drive motors in both the hot and cold mixing pots. This allows for real-time acquisition of the drive motor's operating current, accurately reflecting the motor's load status and indirectly indicating the intensity of material mixing and whether the material quantity is sufficient, avoiding delays or misreadings caused by manual readings. A paperless recorder is communicatively connected to both the temperature and current acquisition units, automatically receiving and storing real-time temperature and current data, replacing the traditional manual timed meter reading mode. This completely solves the problem of time-consuming and labor-intensive manual recording, while avoiding omissions and errors in statistics due to human negligence (such as omitting peak temperature data or incorrectly entering current values), ensuring the integrity and accuracy of the mixing process data.
[0010] Meanwhile, the paperless recorder integrates a real-time clock chip (timing module), which triggers timing based on the temperature change curve of the hot mixing pot (i.e., rising from room temperature to the set upper limit and then falling) and the motor current change curve (i.e., starting when the rated current threshold is reached and stopping when it drops below the lower limit). It accurately records the start and end time of mixing for a single pot and calculates the mixing duration. The counting module automatically accumulates the number of production pots based on the complete mixing duration, avoiding the subjectivity of manually judging the start and end time of mixing, such as timing too early or too late, and the error of manually counting the number of pots (such as omissions or double counting). It realizes the automated and accurate statistics of the mixing duration of a single pot and the number of production pots, and improves the efficiency of production data statistics.
[0011] This application generates relevant production curves based on real-time collected temperature and current changes. Utilizing temperature variations and differences in mixing time during the mixing process, it automatically records the mixing time for each batch of materials. Finally, the aforementioned production data is transmitted to the control terminal computer, which automatically outputs the production data. This provides a PVC mixing recording device that achieves automatic recording of mixing data and accurate counting of batches, eliminating human error. Attached Figure Description
[0012] Figure 1 This is a block diagram of the overall structure of the PVC mixing and recording device in this embodiment of the present invention; Figure 2 This is a schematic diagram of the current curve displayed in the paperless recorder in this embodiment of the present invention; In the attached image: 1. Hot mixing pot; 2. Cold mixing pot; 3. Temperature acquisition unit; 4. Current acquisition unit; 5. Paperless recorder; 6. Production control terminal; 7. Hot mixing current curve. Detailed Implementation
[0013] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.
[0014] As shown in Figure 1, a PVC mixing recording device is provided, including a data acquisition module and a paperless recorder 5.
[0015] The data acquisition module includes a temperature acquisition unit and a current acquisition unit. The temperature acquisition unit extends into the hot mixing pot and the cold mixing pot, respectively. The current acquisition unit is connected to the power supply circuit of the drive motor of the hot mixing pot and the cold mixing pot. The paperless recorder communicates with the temperature acquisition unit and the current acquisition unit, and is connected to the production control terminal. Specifically, the temperature acquisition unit is a platinum resistance temperature sensor, and at least two are provided. The probes of the two platinum resistance temperature sensors extend into the hot mixing pot and the cold mixing pot of the PVC mixer, respectively, and are in direct contact with the materials in the corresponding pots. They are also fitted along the contact area of the materials in the pots to collect the material temperature of the hot mixing pot and the cold mixing pot in real time. The current acquisition unit is a Hall current sensor, and at least two are provided. The two Hall current sensors are connected in series to the power supply circuit of the drive motor of the hot mixing pot and the drive motor of the cold mixing pot, respectively, to collect the operating current of the drive motor power supply circuit in real time. The paperless recorder is communicatively connected to the temperature acquisition unit and the current acquisition unit. It integrates a timing module, a counting module, a data storage unit, and a color display screen. The timing module is a real-time clock chip that triggers timing based on the temperature change curve of the hot mixing pot and the current change curve of the hot mixing pot's drive motor, recording the start and end times of a single pot's mixing process and calculating the mixing duration. The counting module automatically counts the number of production pots within a set period based on the mixing duration output by the timing module. The data storage unit stores real-time temperature and current data acquired by the temperature and current acquisition units, as well as time data recorded by the timing module and pot count data counted by the counting module. The color display screen displays the temperature curve, current curve, single pot mixing duration, and cumulative production pot count in real time, and supports touch operation for querying historical data. In this application, the paperless recorder is also equipped with a data transmission module, which is communicatively connected to the control terminal of the paperless recorder and transmits the data stored in the paperless recorder to the production control terminal 6 in real time (in this application, the production control terminal refers to the production control terminal computer).
[0016] In one embodiment of this application, the temperature acquisition unit 3 uses two PT100 platinum resistance temperature sensors. The probe of one platinum resistance temperature sensor extends into the hot mixing pot 1, directly contacting the PVC material inside the pot, and is fixedly attached to the curved area of the inner wall of the hot mixing pot where it contacts the material. The probe of the other platinum resistance temperature sensor extends into the cold mixing pot 2, contacting and fixing itself to the material inside the cold mixing pot, ensuring real-time acquisition of the true temperature of the materials in both the hot and cold mixing pots. The PT100 platinum resistance temperature sensors are fixed to the inside of the hot and cold mixing pots using ceramic clamps.
[0017] In one embodiment of this application, the current acquisition unit 4 uses two closed-loop Hall current sensors. One Hall current sensor is connected in series to one phase of the three-phase power supply circuit of the drive motor of the hot mixing pot, and the other Hall current sensor is connected in series to one phase of the three-phase power supply circuit of the drive motor of the cold mixing pot, so as to acquire the current signals of the drive motor of the cold mixing pot and the drive motor of the hot mixing pot in real time.
[0018] The paperless recorder 5 is an industrial-grade paperless recorder with multi-channel input function. It is connected to two platinum resistance temperature sensors and two Hall current sensors through shielded cables to receive the temperature of the materials in the hot mixing pot 1 and the cold mixing pot 2 in real time, as well as the real-time current of the drive motor of the cold mixing pot and the drive motor of the hot mixing pot.
[0019] Since the paperless recorder 5 integrates a timing module (i.e., a real-time clock chip, model DS3231), when the temperature of the hot mixing pot 1 starts to rise continuously from room temperature, and the current of the hot mixing pot's drive motor stabilizes at the upper limit of the rated current threshold (for example, in one embodiment of this application, based on the load characteristics of the drive motor of the hot mixing pot of mainstream small and medium-sized mixers in the industry, which is usually 5.5kW-15kW, the upper limit of the rated current threshold is selected as 60% of the rated current to cover the effective mixing load in small and medium-sized mixers), the timing module starts timing; when the temperature of the hot mixing pot reaches the set upper limit and starts to fall, and the current of the drive motor of the hot mixing pot drops to the lower limit of the rated current threshold (for example, in one embodiment of this application, based on the load characteristics of the drive motor of the mainstream hot mixing pot in the industry, which is usually 5.5kW-15kW, the lower limit of the rated current threshold is selected as 30% of the rated current to identify low load conditions), the timing module ends timing, and at the same time, the mixing time of a single pot is calculated based on the time difference between the end of timing and the start of timing. Meanwhile, by setting the upper limit of the rated current threshold, the instantaneous current of the motor may far exceed the rated current at the moment of motor start-up, but at this time the material has not yet started to be effectively mixed. This can filter the instantaneous high current during the start-up stage and avoid starting the timer when no material is mixed. If there is no material or the amount of material in the hot mixing pot is insufficient, the motor current will be lower than the lower limit of the rated current threshold. Even if the temperature rises due to accidental heating, the timer will not be triggered, thus avoiding the error of counting the number of mixing pots when there is no material.
[0020] In one embodiment of this application, when the temperature of the hot mixing pot continuously rises from room temperature and the current of the hot mixing pot drive motor reaches 60% of the rated current threshold (the upper limit of the rated current threshold), the timing module triggers the start of timing; when the temperature of the hot mixing pot reaches the set upper limit and then drops, and the current of the hot mixing pot drive motor drops to below 30% of the rated current threshold (the lower limit of the rated current threshold), the timing module triggers the end of timing, respectively corresponding to... Figure 2 The peak and valley values of the medium-heat mixing current curve 7. The counting module of the paperless recorder 5 automatically accumulates the count based on the complete mixing time output by the timing module each time (i.e., a complete timing cycle from the start to the end of timing) to count the number of production batches.
[0021] In one embodiment of this application, the data storage unit is a memory card, which stores the collected temperature, current, time, and number of pots data at a set frequency. The color display screen is a TFT touch screen, which displays the temperature curves of the hot mixing pot, the temperature curve of the cold mixing pot, the current curve of the hot mixing pot drive motor, the current curve of the cold mixing pot drive motor, as well as the current mixing time of a single pot and the cumulative number of pots produced, in separate areas. It supports querying historical data for any time period through touch operation.
[0022] The communication module uses an RS485 communication module. One end of the communication module is connected to the communication interface of the paperless recorder 5, and the other end is connected to the production control terminal computer; this allows the data stored in the paperless recorder 5 to be transmitted to the control terminal computer in real time. The control terminal computer then displays the various parameter data in real time.
[0023] In this embodiment, the above structural design enables the automatic collection, recording, transmission and analysis of key data during the mixing process of the PVC mixer, completely solving the drawbacks of manual recording, improving data accuracy and production management efficiency, and providing reliable data support for the optimization of the mixing process.
[0024] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.
Claims
1. A PVC mixing and recording device, characterized in that, include: The data acquisition module includes a temperature acquisition unit and a current acquisition unit. The temperature acquisition unit is respectively installed in the hot mixing pot and the cold mixing pot of the PVC mixer to acquire the temperature of the hot mixing pot and the cold mixing pot in real time. The current acquisition unit is respectively connected to the power supply circuit of the drive motor of the hot mixing pot and the cold mixing pot to acquire the power supply current of the drive motor of the hot mixing pot and the cold mixing pot in real time. The paperless recorder is communicatively connected to the temperature acquisition unit, the current acquisition unit, and the production control terminal. The paperless recorder receives and stores the real-time temperature and real-time current of the cold mixing pot and the hot mixing pot collected by the temperature acquisition unit and the current acquisition unit. The paperless recorder counts the number of mixing pots based on the start and end times of mixing in a single pot.
2. The PVC mixing and recording device according to claim 1, characterized in that, The paperless recorder integrates a timing module and a counting module; The timing module is used to record the start and end times of a single batch mixing and to calculate the mixing time of a single batch. The counting module counts the number of production batches based on the mixing time.
3. The PVC mixing and recording device according to claim 2, characterized in that, The timing module is a real-time clock chip, and the timing module triggers timing based on the temperature change curve of the hot mixing pot and the current change curve of the drive motor of the hot mixing pot.
4. The PVC mixing and recording device according to claim 1, characterized in that, The temperature acquisition unit is a resistance temperature sensor, and at least two temperature acquisition units are provided. The probes of the two resistance temperature sensors extend into the interior of the hot mixing pot and the cold mixing pot, respectively, and are in contact with the corresponding materials in the pot, and are attached to the area in the pot where they are in contact with the materials.
5. A PVC mixing and recording device according to claim 1, characterized in that, The current acquisition unit is a Hall current sensor; The Hall current sensors are connected in series in the power supply circuits of the drive motors for the hot mixing pot and the cold mixing pot, respectively.
6. The PVC mixing and recording device according to claim 1, characterized in that, The paperless recorder is also equipped with a color display screen.