Automatic rotary evaporation all-in-one machine integrating multi-parameter intelligent regulation and control and operation regulation and control method

Abstract

The invention discloses an automatic rotary evaporation all-in-one machine integrating multi-parameter intelligent regulation and control and an operation regulation and control method. The automatic rotary evaporation all-in-one machine comprises a rack, a rotary evaporation main body module, a cooling system, an automatic heating system, a vacuum system and a control system. By arranging detection devices such as the flow switch, the pressure transmitter and the liquid level sensor, parameters such as the flow of the cooling system and the pressure, the liquid level, the temperature and the vacuum degree in the rotary evaporation bottle can be monitored in real time, and the parameters are transmitted to the control system. The control system automatically adjusts the running states of the circulating pump, the heating device and the vacuum pump according to the parameters, automatic cooling circulation, automatic reaction heating and automatic detection and control of pressure and liquid level are achieved, the automation degree of equipment is improved, manual intervention is reduced, and the working intensity of operators is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material concentration, separation and purification equipment, in particular to an automatic rotary evaporation integrated machine integrated with multi-parameter intelligent regulation and control and a running regulation and control method. BACKGROUND

[0002] In the chemical, pharmaceutical, biological and other industries, the rotary evaporation integrated machine is a commonly used equipment for material concentration, separation and purification. In the operation process of the traditional rotary evaporation integrated machine, frequent manual intervention is often required, such as manual adjustment of the flow of cooling circulation, the temperature of heating, monitoring of the pressure and liquid level in the equipment, etc. This not only increases the working strength of the operator, but also easily leads to unstable operation of the equipment due to human operation errors, and even causes safety accidents. At present, the existing rotary evaporation integrated machines on the market still have certain deficiencies in automatic control. For example, the cooling circulation system usually runs in a fixed flow mode, which cannot automatically adjust the cooling flow according to the actual evaporation situation, resulting in low cooling efficiency or energy waste; the heating system mostly relies on manual temperature setting and cannot automatically adjust according to the state of the material in the equipment and parameters such as pressure and liquid level, which easily causes uneven heating or excessively high or low temperature; for the monitoring of the pressure and liquid level in the equipment, the traditional equipment often lacks real-time and accurate detection and automatic control functions, and when the pressure is too high or the liquid level is abnormal, effective measures cannot be taken in time for processing, which has great safety hazards. Therefore, there is an urgent need for an automatic rotary evaporation integrated machine capable of realizing functions such as automatic cooling circulation, flow monitoring, automatic reaction heating, pressure and liquid level detection, etc., to improve the operation safety and working efficiency of the equipment and reduce manual intervention. SUMMARY

[0003] In view of the above technical problems in the related art, the present application provides an automatic rotary evaporation integrated machine integrated with multi-parameter intelligent regulation and control and a running regulation and control method, which can solve the above problems.

[0004] To achieve the above technical purposes, the technical solution of the present application is as follows: An automatic rotary evaporation integrated machine integrated with multi-parameter intelligent regulation and control, comprising: A rotary evaporation main module, which comprises a rotary drive unit for driving a rotary evaporation flask, the rotary evaporation flask is connected to a collection flask through a collection pipeline, a liquid level sensor is arranged in the collection flask, and a discharge valve is arranged at the discharge end of the bottom of the collection flask, and a condenser tube is arranged at the top of the inner cavity of the collection pipeline, the rotary drive unit, the liquid level sensor and the discharge valve are all electrically connected to a control system; A cooling system comprises a cooling water tank connected with the condensing pipe through a circulating pipe, a circulating peristaltic pump and a flow switch are arranged on the circulating pipe, a temperature sensor one and a pressure transmitter one are arranged in the cooling water tank, the circulating peristaltic pump, the temperature sensor one, the pressure transmitter one and the flow switch are electrically connected with the control system. An automatic heating system comprises a water bath, one end of the rotary evaporating bottle is obliquely immersed in the water bath, a heating device is arranged outside the water bath, a temperature sensor two is arranged in the water bath, a pressure transmitter two is arranged at the bottom of the water bath, the heating device, the temperature sensor two and the pressure transmitter two are electrically connected with the control system. A vacuum system comprises a vacuum pump connected with the top of the collecting pipe through a pipe to extract air to form a vacuum environment, and a vacuum pressure transmitter for detecting the vacuum degree of the vacuum environment, the vacuum pump and the vacuum pressure transmitter are electrically connected with the control system.

[0005] Further, the rotary driving unit is installed on the top of the rack.

[0006] Further, the control system is electrically connected with the alarm unit.

[0007] Further, an automatic lifting device is connected with the lower end of the water bath, the automatic lifting device adopts a stepping servo motor as a driving unit and is provided with a safety limit switch, and the automatic lifting device is electrically connected with the control system.

[0008] Further, an open mouth is arranged on one side of the middle part of the collecting pipe, an adjustable opening degree analog electromagnetic valve is arranged in the open mouth, and the adjustable opening degree analog electromagnetic valve is electrically connected with the control system.

[0009] An operation control method of an automatic rotary evaporation integrated machine with integrated multi-parameter intelligent control comprises the following steps: S100, the control system automatically controls the rotary evaporation main module, the cooling system, the automatic heating system and the vacuum system according to the preset program and control strategy according to the set parameters input by the operator and the real-time monitoring signals of each sensor, so as to realize the automatic operation of the equipment. S110, the control system controls the rotary driving unit to start and drives the rotary evaporating bottle to rotate at a preset speed. S120, the temperature sensor two monitors the temperature in the water bath in real time, the pressure transmitter two monitors the pressure in the water bath in real time, the real-time monitored temperature and pressure are transmitted to the control system, and the control system automatically adjusts the heating power of the heating device and the lifting height of the water bath according to the real-time monitored temperature and pressure, the preset program and the control strategy; S130, after the circulating peristaltic pump is started, the cooling liquid flows in the circulating pipeline, the vapor evaporated from the rotary evaporation bottle is cooled through the condensing pipe, the vapor is condensed into liquid, the flow switch monitors the flow of the cooling liquid in the circulating pipeline in real time, and the flow signal is transmitted to the control system, and the control system controls the rotating speed of the circulating peristaltic pump according to the flow signal; S140, after the vacuum pump is started, the collection space formed by the rotary evaporation bottle, the collection pipeline and the collection bottle is vacuumized, the vacuum pressure transmitter monitors the vacuum degree in the collection space in real time, and the vacuum degree signal is transmitted to the control system, and the control system automatically adjusts the operating state of the adjustable opening degree analog electromagnetic valve according to the set vacuum degree range.

[0010] Further, the control system is provided with an operation touch screen for inputting setting parameters and displaying the operating state and real-time operating parameters of the equipment.

[0011] Further, in step S140, when the vacuum degree is lower than the set lower limit value, the control system controls the vacuum pump to increase the air exhaust rate, and when the vacuum degree is higher than the set upper limit value, the control system controls the vacuum pump to stop running or reduce the air exhaust speed or adjust the opening degree of the adjustable opening degree analog electromagnetic valve, so as to maintain the vacuum degree in the collection space within the preset range.

[0012] The beneficial effects of the present application are as follows: The present application can monitor the flow of the cooling system, the pressure, liquid level, temperature and vacuum degree in the rotary evaporation bottle in real time by setting the detection devices such as the flow switch, the pressure transmitter and the liquid level sensor, and transmit these parameters to the control system. The control system automatically adjusts the operating state of the circulating pump, the heating device and the vacuum pump according to these parameters, realizes automatic cooling circulation, automatic reaction heating, automatic detection and control of pressure and liquid level, improves the automation degree of the equipment, reduces manual intervention and reduces the working intensity of the operators.

[0013] The cooling system can automatically adjust the flow of the cooling liquid according to the actual evaporation condition, improve the cooling efficiency, and at the same time avoid energy waste. The automatic reaction heating system can automatically adjust the heating power according to the temperature, pressure and liquid level of the material, realize the uniformity and precision of heating, and avoid the adverse effects caused by too high or too low temperature on the material.

[0014] The pressure and liquid level detection function can monitor the pressure and liquid level state in the device in real time, and when the pressure is too high or the liquid level is abnormal, the control system can timely issue an alarm and take corresponding control measures, such as adjusting the running state of the vacuum pump, closing the related valve, etc., improving the operation safety of the device and avoiding the occurrence of safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0016] The present application will be further described in detail below according to the drawings.

[0017] Fig. 1 is a structural diagram of an integrated multi-parameter intelligent control automatic rotary evaporation integrated machine according to an embodiment of the present application; Fig. 2 is a working principle diagram of an integrated multi-parameter intelligent control automatic rotary evaporation integrated machine according to an embodiment of the present application.

[0018] In the drawings: 1, rotary evaporation flask; 2, rotary drive unit; 3, collection flask; 4, discharge valve; 5, control system; 6, rack; 7, condenser tube; 8, cooling water tank; 9, circulating peristaltic pump; 10, temperature sensor 1; 11, pressure transmitter 1; 12, water bath; 13, temperature sensor 2; 14, pressure transmitter 2; 15, automatic lifting device; 16, vacuum pump; 17, collection pipeline; 18, adjustable opening degree analog electromagnetic valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0020] As shown in Figs. 1-2 According to the present application, an integrated multi-parameter intelligent control automatic rotary evaporation integrated machine is disclosed, which comprises a rack 6, a rotary evaporation main module, a cooling system, an automatic heating system, a vacuum system and a control system.

[0021] In one specific embodiment of the present application, the rotary evaporation main module includes a rotary drive unit 2 for driving the rotary evaporation flask 1, the rotary drive unit 2 is installed on the top of the rack 6, the rotary evaporation flask 1 is connected to the collection flask 3 through the collection pipeline 17, the collection flask 3 is used to receive the solvent evaporated from the rotary evaporation flask 1, the collection flask 3 is provided with a liquid level sensor for monitoring the liquid level of the solvent in the collection flask 3 and transmitting the liquid level signal to the control system 5, when the liquid level in the collection flask 3 reaches the set upper limit value, the control system 5 controls the alarm unit to issue an alarm (such as a buzzer and / or an alarm lamp), stops the rotary evaporation experiment, and controls the discharge valve 4 to open to complete the material collection work.

[0022] In one specific embodiment of the present application, the cooling system includes a cooling water tank 8 connected to the condensing pipeline 7 through a circulating pipeline, a circulating peristaltic pump 9 is arranged on the circulating pipeline for driving the cooling liquid to circulate between the cooling water tank 8 and the condensing pipeline 7, a temperature sensor 10 and a pressure transmitter 11 are arranged in the cooling water tank for monitoring the temperature and liquid level of the cooling liquid, a flow switch is arranged on the circulating pipeline for monitoring the flow of the cooling liquid and transmitting the flow signal to the control system 5, and the control system 5 automatically adjusts the rotating speed of the circulating peristaltic pump 9 according to the flow signal to control the flow of the cooling liquid, thereby realizing automatic cooling circulation.

[0023] In one specific embodiment of the present application, the automatic heating system includes a water bath 12, a heating device is arranged outside the water bath 12 for heating the material in the rotary evaporation flask 1, a temperature sensor 13 is arranged in the water bath 12 for monitoring the temperature of the material heating and transmitting the temperature signal to the control system, further, a pressure transmitter 14 is arranged at the bottom of the water bath for judging the evaporation condition of the material by monitoring the change of the pressure in the water bath, the automatic lifting device 15 adopts a step servo motor as a driving unit and is provided with a safety limit switch, which can realize dynamic adjustment of the lifting height, and the control system automatically adjusts the height of the water bath 12 and the heating power of the heating device according to the temperature signal and the pressure signal, thereby realizing automatic reaction heating.

[0024] In one specific embodiment of the present application, the vacuum system includes a vacuum pump 16 connected to the top of the collection pipeline 17 through a pipeline for pumping out air to form a vacuum environment, and a vacuum pressure transmitter for detecting the vacuum degree of the vacuum environment, the vacuum pressure transmitter monitors the vacuum degree of the system in real time and transmits the vacuum degree signal to the control system 5, and the control system automatically adjusts the opening degree of the adjustable opening degree analog electromagnetic valve 18 according to the vacuum degree signal to maintain the working vacuum degree in the rotary evaporation flask 1 within the set range.

[0025] In one specific embodiment in the present application, the control system is provided with an operation touch screen (HMI), through which the set temperature, pressure, vacuum degree, liquid level and other parameters can be input, and the display screen displays the running state and various parameters of the equipment in real time, including the cooling liquid flow, material temperature, tank pressure, vacuum degree, liquid level data, etc. The control system automatically controls each system / module of the equipment according to the set parameters input by the operator and the signals monitored by each sensor in real time, and realizes the automatic operation of the equipment according to the preset control program.

[0026] In one specific embodiment in the present application, the rotary evaporation integrated machine in the present application is a multi-layer hierarchical control system in the control layer, which is divided into a perception layer, a data layer, an execution layer, a control layer and a human-computer interaction layer. The human-computer interaction layer includes a touch display screen, which is used for parameter setting, process program selection, real-time data display, data storage, historical curve viewing, fault alarm and remote management, etc. The control layer includes a PLC controller, which receives sensor data, processes corresponding data, and adjusts the PID algorithm of the automatic heating system, the cooling system and the vacuum system according to the preset program and control strategy, judges abnormal parameters and fault alarms, and outputs the execution layer, etc. The execution layer includes heating modules, vacuum pumps, electromagnetic valves, compressors and other components in the system, which adjust each module according to the execution command issued by the control layer. The data layer includes analog input and digital input modules of the PLC, which are used to receive signals from each sensor and upload them to the control layer. The perception layer includes flow switches, pressure transmitters, liquid level sensors, temperature sensors, vacuum pressure transmitters, etc., which are used to collect and transmit the running parameter conditions of each device in each system in real time.

[0027] In one specific embodiment in the present application, the rotary evaporation integrated machine is operated and controlled through the following steps: S100, the control system 5 automatically controls the rotary evaporation main module, the cooling system, the automatic heating system and the vacuum system according to the set parameters input by the operator and the signals monitored by each sensor in real time, and realizes the automatic operation of the equipment according to the preset program and control strategy.

[0028] S110, the control system 5 controls the rotary drive unit 2 to start, and drives the rotary evaporation flask 1 to rotate at a preset speed.

[0029] S120, the temperature sensor two 13 real-time monitoring of the temperature in the water bath 12, pressure transmitter two 14 real-time monitoring of the pressure in the water bath 12, the pressure by conversion for water bath liquid level, can real-time judge the evaporation condition of material (such as water bath liquid at 80 degrees of temperature evaporation decreased 5 cm, about corresponding to the evaporation material evaporation degree can reach 70%, according to the rough correlation of the actual experimental data), these signals are transmitted to the control system 5. Control system 5 according to the preset program and control strategy, and based on the received signal, automatically adjust the heating power of heating device and the lifting height of water bath 12. For example, when the material temperature is lower than the set temperature, the control system controls the heating device to increase the heating power; when the material temperature is close to the set temperature, the heating device is controlled to reduce the heating power, so as to maintain the material temperature in the set range. At the same time, when the pressure in the rotary evaporating flask is too high or the liquid level is abnormal, the control system will also adjust the heating power and the height of the water bath accordingly to ensure the safety and stability of the heating process.

[0030] S130, after the start of the circulating peristaltic pump 9, the cooling liquid flows in the circulating pipeline, and the condensing pipe 7 cools the steam evaporated from the rotary evaporating flask 1 to condense the steam into liquid. The flow switch monitors the flow of cooling liquid in the circulating pipeline in real time, and transmits the flow signal to the control system 5. For example, when the flow is lower than the set minimum value, the control system 5 controls the rotating speed of the circulating peristaltic pump 9 to increase, so as to increase the flow of cooling liquid; when the flow is higher than the set maximum value, the control system 5 controls the rotating speed of the circulating peristaltic pump 9 to decrease, so as to reduce the flow of cooling liquid, thereby realizing automatic cooling circulation.

[0031] S140, after the start of the vacuum pump 16, the collection space formed by the rotary evaporating flask 1, the collection pipeline 17 and the collection flask 3 is vacuumized, and the vacuum pressure transmitter monitors the vacuum degree in the collection space in real time and transmits the vacuum degree signal to the control system 5. The control system automatically adjusts the running state of the adjustable opening degree analog electromagnetic valve 18 according to the set vacuum degree range. When the vacuum degree is lower than the set lower limit value, the control system 5 controls the vacuum pump to increase the air exhaust rate; when the vacuum degree is higher than the set upper limit value, the control system controls the vacuum pump to stop running or reduce the air exhaust speed or adjust the opening degree of the electromagnetic valve, so as to maintain the vacuum degree in the collection space within a suitable range.

[0032] In summary: the innovation points of the present application include the following innovation points: (1) Multi-parameter fusion dynamic regulation technology For the first time, the flow, pressure, liquid level, temperature and other parameters are analyzed and fused to establish a "material quantity-temperature-vacuum degree-cooling temperature" mathematical model, and the optimal process parameters (such as automatically reducing the heating power when the material decreases) are calculated in real time by PLC, which solves the "parameter regulation lag" problem of traditional rotary evaporators (the response time is shortened from 30s to 5s).

[0033] (2) Full-process safety redundancy protection integrated "monitoring-early warning-shutdown" three-level safety mechanism Monitoring level: Real-time data acquisition by pressure / liquid level / temperature sensors (sampling frequency 10 Hz).

[0034] Early warning level: HMI pop-up + buzzer alarm when parameters exceed threshold (such as pressure > 0.8 bar) (response time < 1 s).

[0035] Shutdown level: Automatically trigger pressure relief, power off, and mechanical arm reset when abnormality is not eliminated (action time < 2 s), accident rate reduced from 10% to 0.5% (only 5 abnormalities in 1000 batches of experiments).

[0036] (3) Self-adaptive heating control technology, automatic reaction heating system supports "programmed heating + real-time correction" dual mode Programmed heating: Pre-set heating curve according to solvent characteristics (such as boiling point, thermal stability); Real-time correction: Dynamically adjust heating power through rotary evaporation flask liquid level data (error ≤ 5%), avoid over-evaporation or boiling (over-evaporation rate reduced from 8% to 1%).

[0037] (4) Dynamic vacuum degree regulation technology.

[0038] The vacuum system adopts "pressure transmitter + analog electromagnetic valve" closed-loop control mode, which can dynamically adjust the opening of the electromagnetic valve according to the set vacuum degree of the experiment to realize constant pressure dynamic regulation of the vacuum degree.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic rotary steaming machine with integrated multi-parameter intelligent control, characterized in that: include: A rotary evaporation main body module, the rotary evaporation main body module comprising a rotary drive unit (2) for driving a rotary evaporation bottle (1), the rotary evaporation bottle (1) being connected to a collecting bottle (3) via a collecting pipe (17), a liquid level sensor being provided in the collecting bottle (3), and a discharge valve (4) being provided at the discharge end at the bottom of the collecting bottle (3), a condenser (7) being provided at the top of the inner cavity of the collecting pipe (17), the rotary drive unit (2), the liquid level sensor and the discharge valve (4) being electrically connected to a control system (5); A cooling system, wherein the cooling system comprises a cooling water tank (8), the cooling water tank (8) is connected to the condenser (7) via a circulation pipe, the circulation pipe is provided with a circulation peristaltic pump (9) and a flow switch, the cooling water tank is provided with a temperature sensor (10) and a pressure transmitter (11), the circulation peristaltic pump (9), the temperature sensor (10), the pressure transmitter (11) and the flow switch are all electrically connected to the control system (5); An automatic heating system, the automatic heating system comprising a water bath (12), one end of the rotary evaporation flask (1) being obliquely immersed in the water bath (12), a heating device being provided on the outside of the water bath (12), a second temperature sensor (13) being provided inside the water bath (12), and a second pressure transmitter (14) being provided on the bottom of the water bath (12), the heating device, the second temperature sensor (13), and the second pressure transmitter (14) being electrically connected to the control system (5); A vacuum system, comprising a vacuum pump (16), wherein the vacuum pump (16) is connected to the top of the collecting pipe (17) through a pipe for extracting air to form a vacuum environment, and further comprising a vacuum pressure transmitter for detecting the vacuum degree of the vacuum environment, wherein the vacuum pump (16) and the vacuum pressure transmitter are both electrically connected to the control system (5).

2. The automatic rotary steaming machine with integrated multi-parameter intelligent control according to claim 1 is characterized in that: The rotary drive unit (2) is mounted on the top of the frame (6).

3. The automatic rotary steaming machine with integrated multi-parameter intelligent control according to claim 1 is characterized in that: The control system (5) is electrically connected to an alarm unit.

4. The automatic rotary steaming machine with integrated multi-parameter intelligent control according to claim 1 is characterized in that: The lower end of the water bath (12) is connected to an automatic lifting device (15), the automatic lifting device (15) uses a stepping servo motor as a driving unit and is provided with a safety limit switch, and the automatic lifting device (15) is electrically connected to the control system (5).

5. The automatic rotary steaming machine with integrated multi-parameter intelligent control according to claim 1 is characterized in that: An open mouth is provided on one side of the middle portion of the collecting pipe (17), and an adjustable opening analog solenoid valve (18) is provided in the open mouth. The adjustable opening analog solenoid valve (18) is electrically connected to the control system (5).

6. An operation control method for an automated rotary steaming machine with integrated multi-parameter intelligent control according to any one of claims 1 to 5, characterized in that: The steps include: S100, the control system (5) automatically controls the rotary evaporation main module, the cooling system, the automatic heating system, and the vacuum system according to the set parameters input by the operator and the signals monitored in real time by each sensor, in accordance with the preset program and control strategy, to achieve automatic operation of the equipment; S110, the control system (5) controls the rotation drive unit (2) to start, and drives the rotary evaporation flask (1) to rotate at a preset speed; S120, the second temperature sensor (13) monitors the temperature in the water bath (12) in real time, the second pressure transmitter (14) monitors the pressure in the water bath (12) in real time, and transmits the real-time monitored temperature and pressure to the control system (5), and the control system (5) automatically adjusts the heating power of the heating device and the lifting height of the water bath (12) according to the real-time monitored temperature and pressure, a preset program and a control strategy; S130, after the circulating peristaltic pump (9) is started, the cooling liquid is driven to flow in the circulating pipe, and the steam evaporated from the rotary evaporation bottle (1) is cooled through the condenser (7), and the steam is condensed into liquid. The flow switch monitors the flow of the cooling liquid in the circulating pipe in real time and transmits the flow signal to the control system (5). The control system (5) controls the rotation speed of the circulating peristaltic pump (9) according to the flow signal; S140, after the vacuum pump (16) is started, the collection space formed by the rotary evaporation bottle (1), the collection pipe (17) and the collection bottle (3) is evacuated, the vacuum pressure transmitter monitors the vacuum degree in the collection space in real time, and transmits the vacuum degree signal to the control system (5), and the control system (5) automatically adjusts the operating state of the adjustable opening analog solenoid valve (18) according to the set vacuum degree range.

7. The operation control method according to claim 6, characterized in that: The control system (5) is provided with an operating touch screen for inputting setting parameters and displaying the operating status and real-time operating parameters of the equipment.

8. The operation control method according to claim 6, characterized in that: In step S140, when the vacuum degree is lower than the set lower limit value, the control system (5) controls the vacuum pump to increase the pumping rate; when the vacuum degree is higher than the set upper limit value, the control system (5) controls the vacuum pump to stop running or reduce the pumping rate or adjust the opening of the adjustable opening analog solenoid valve (18) to maintain the vacuum degree in the collection space within a preset range.

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