Automatic temperature control device for sediment preparation tank

Abstract

The utility model relates to the field of medicine processing equipment, in particular to an automatic temperature control device for a precipitate preparation tank, which comprises a return difference control temperature controller for setting a heating temperature and a return difference value and outputting a control signal; the temperature sensing probe is arranged in the circulating pipeline and is used for detecting the heating temperature of the liquid medicine and outputting a detected temperature signal to the return difference control temperature controller; the circulating pump is arranged on the circulating pipeline and is used for driving the liquid medicine to circularly flow; and the control valve is arranged on the heating pipeline and is used for controlling the on-off of the heating pipeline and receiving a control signal of the return difference control temperature controller so as to realize opening or closing. A return difference control mode is adopted, and a specific heating temperature and a return difference value can be set, so that the system is not immediately turned off when the liquid medicine temperature reaches a set value, but is restarted when the temperature is reduced to be below the return difference value, and the heating equipment is prevented from being frequently turned on and turned off.

Description

Technical Field

[0001] The present application relates to the field of pharmaceutical processing equipment, and particularly to an automatic temperature control device for a precipitation preparation tank. Background Art

[0002] In the pharmaceutical process, a precipitation tank is used to precipitate and purify the liquid medicine, improve the cleanliness and purity of the liquid medicine, and avoid the influence of precipitates on the purity of the liquid medicine. When some medicines need to be kept stable or achieve the best precipitation effect at a specific temperature, or when it is necessary to accelerate the dissolution and precipitation process of certain substances, the liquid medicine needs to be heated.

[0003] The heating of the liquid medicine is usually carried out by using steam or hot water. During the heating process, the liquid medicine is driven by a circulation pump to circulate in the circulation pipeline, and steam or hot water is introduced into the heating pipeline. The heating pipeline can be coiled around the circulation pipeline to heat the liquid medicine in a circulating manner.

[0004] During the heating process of the liquid medicine, the temperature also needs to be controlled. At this time, a temperature controller is required to monitor the temperature. In order to realize the heating and heat preservation of the liquid medicine, most of them need to set multiple temperature controllers for PID control. By connecting the relay of the circulation pump through the low-limit temperature controller and disconnecting the relay of the circulation pump through the high-limit temperature controller, the operation of the circulation pump can be controlled. This requires at least two temperature controllers, increasing the cost. And the PID control is specifically manifested as turning off the heating after the temperature is higher than the set temperature and turning on the heating when the temperature is lower than the set temperature. Therefore, when the temperature fluctuates repeatedly, the heating will be frequently turned on and off, which will reduce the service life of electrical appliances such as the circulation pump to a certain extent. Utility Model Content

[0005] The present application provides an automatic temperature control device for a precipitation preparation tank, which can regulate the temperature of the liquid medicine in the precipitation tank and has the advantages of low cost and high stability.

[0006] The automatic temperature control device for a precipitation preparation tank provided by the present application adopts the following technical solutions:

[0007] An automatic temperature control device for a precipitation preparation tank, comprising:

[0008] A dead-band control temperature controller, which is used to set the heating temperature and the dead-band value, and output a control signal according to the received temperature signal;

[0009] A temperature sensor probe, which is arranged in the circulation pipeline and is used to detect the heating temperature of the liquid medicine and output the detected temperature signal to the dead-band control temperature controller;

[0010] A circulation pump, which is arranged on the circulation pipeline and is used to drive the liquid medicine to circulate, and receives the control signal of the dead-band control temperature controller to realize opening or closing;

[0011] A control valve is provided on the heating pipeline to control the on / off of the heating pipeline and receives the control signal of the dead-band control temperature controller to achieve opening or closing.

[0012] By adopting the above technical solution, due to the dead-band control method, a specific heating temperature and dead-band value can be set, so that the system will not immediately turn off the heating equipment when the liquid medicine temperature reaches the set value, but will restart when the temperature drops below the dead-band value, thus avoiding frequent opening and closing of the heating equipment and extending the service life of the electrical appliances.

[0013] Preferably, the control valve is an electric valve.

[0014] By adopting the above technical solution, the electric valve can quickly open or close according to the control signal of the dead-band control temperature controller, further improving the accuracy of temperature control.

[0015] Preferably, the control valve is a pneumatic valve, and a solenoid valve is installed on the control pipeline of the pneumatic valve to receive the control signal of the dead-band control temperature controller and control the operation of the pneumatic valve.

[0016] By adopting the above technical solution, by controlling the on / off of the control pipeline of the pneumatic valve through the solenoid valve, the accuracy and stability of the control can be ensured.

[0017] Preferably, an installation bracket is provided on the control valve, and the solenoid valve is fixedly connected to the installation bracket; a connecting pipe is provided between the solenoid valve and the control valve, and the solenoid valve is connected to the control valve through the connecting pipe.

[0018] By adopting the above technical solution, the integrity of the solenoid valve and the control valve can be improved, and it is highly integrated, facilitating its installation in equipment such as electrical cabinets.

[0019] Preferably, the connecting pipe is set as a rigid pipe.

[0020] By adopting the above technical solution, the stability of the connection between the solenoid valve and the control valve can be improved.

[0021] Preferably, it further includes a detection module, and the detection module includes a main control board and a working detection unit. The main control board is electrically connected to the temperature sensor probe to receive the temperature signal; the working detection unit is electrically connected to the circulation pump to detect whether the circulation pump is running; the working detection unit is also electrically connected to the main control board to transmit the electrical signal.

[0022] By adopting the above technical solution, the detection module can real-time monitor the working state of the circulation pump and the heating temperature of the liquid medicine, thus ensuring the normal operation of the system and the quality of the liquid medicine.

[0023] Preferably, the working detection unit includes a Hall sensor and a signal conditioning circuit;

[0024] The Hall sensor is connected to the power cord of the circulation pump to detect the working current signal of the circulation pump;

[0025] The signal conditioning circuit is electrically connected to the Hall sensor to filter and amplify the current signal;

[0026] The main control board is electrically connected to the signal conditioning circuit to receive the current signal.

[0027] By adopting the above technical solution, when heating is required at a low temperature, if the detection module detects that the circulation pump is not working properly, an alarm can be issued in time or other measures can be taken; when heating needs to be stopped at a high temperature, if the detection module detects that the circulation pump is still working, it can also be processed in time to avoid overheating of the liquid medicine.

[0028] Preferably, an alarm is further included, and the alarm is electrically connected to the main control board for alarming when the circulation pump works abnormally or the temperature of the liquid medicine is abnormal.

[0029] By adopting the above technical solution, through the alarm, abnormal situations in the system can be discovered and processed in time, improving the safety and reliability of the system.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. By adopting the hysteresis control method and setting the heating temperature and hysteresis value, precise control of the heating temperature of the liquid medicine is achieved, avoiding frequent opening and closing of the heating equipment, thereby prolonging the service life of the electrical appliance;

[0032] 2. By integrating components such as a hysteresis control temperature controller, a temperature sensor probe, a circulation pump, and a control valve, the temperature control system is simplified, the cost is reduced, and the reliability and stability of the system are improved;

[0033] 3. By adding a detection module and an alarm, the working state of the circulation pump and the heating temperature of the liquid medicine can be monitored in real time, and an alarm can be issued in case of abnormalities, further improving the safety and reliability of the system. Description of the Drawings

[0034] Figure 1 is a schematic circuit structure diagram of the automatic temperature control device for the precipitation preparation tank in the embodiment of the present application;

[0035] Figure 2 is a schematic connection structure diagram of the pneumatic control valve and the solenoid valve in the embodiment of the present application.

[0036] Reference numerals in the drawings: 1. Hysteresis control temperature controller; 2. Temperature sensor probe; 3. Circulation pump; 4. Control valve; 41. Mounting bracket; 5. Solenoid valve; 6. Connecting pipe; 7. Detection module; 71. Main control board; 72. Working detection unit; 721. Hall sensor; 722. Signal conditioning circuit; 8. Alarm. Detailed implementation mode

[0037] The following will Figure 1-2 further describe the present application in detail.

[0038] This embodiment discloses an automatic temperature control device for a precipitation preparation tank. Referring to Figure 1 , it includes a hysteresis control temperature controller 1, a temperature sensor probe 2, a circulation pump 3, and a control valve 4. The hysteresis control temperature controller 1 is used to set the heating temperature and the hysteresis value, and output a control signal according to the received temperature signal. The temperature sensor probe 2 is arranged in the circulation pipeline and is used to detect the heating temperature of the liquid medicine and output the detected temperature signal to the hysteresis control temperature controller 1. The circulation pump 3 is arranged on the circulation pipeline and is used to drive the liquid medicine to circulate, and receive the control signal of the hysteresis control temperature controller 1 to realize opening or closing. The control valve 4 is an electric valve and is arranged on the heating pipeline and is used to control the on-off of the heating pipeline, and receive the control signal of the hysteresis control temperature controller 1 to realize opening or closing.

[0039] The heating temperature and the hysteresis value are set through the hysteresis control temperature controller 1, and the temperature sensor probe 2 detects the heating temperature of the liquid medicine in real time and feeds back the signal to the hysteresis control temperature controller 1. When the temperature of the liquid medicine is lower than the set heating temperature, the hysteresis control temperature controller 1 outputs a control signal to start the circulation pump 3 and the control valve 4, so that the liquid medicine circulates in the circulation pipeline and is heated through the heating pipeline.

[0040] The hysteresis control temperature controller 1 adopts the hysteresis control method to replace the PID control, sets the heating temperature and the hysteresis value, and adopts the hysteresis control method to replace the PID control. One hysteresis control temperature controller 1 completes the control work of two temperature controllers and realizes automatic heat preservation. For example, if the temperature of the liquid medicine is set at 95 °C and the hysteresis value of the hysteresis control temperature controller 1 is set at 10 °C, then the hysteresis control temperature controller 1 can control the circulation pump 3 to start when the temperature is lower than 90 °C and control the circulation pump 3 to close when the temperature is higher than 100 °C, so as to control the temperature of the liquid medicine between 90 °C and 100 °C.

[0041] As a preferred implementation mode of this embodiment of the present application, the control valve 4 is a pneumatic valve, and in order to realize automatic control and reduce the length of the pneumatic control pipeline, a solenoid valve 5 is installed on the control pipeline of the pneumatic valve. The solenoid valve 5 is used to receive the control signal of the hysteresis control temperature controller 1 and control the operation of the pneumatic valve.

[0042] The pneumatic valve receives the control signal of the differential control temperature controller 1 through the solenoid valve 5. When heating needs to be started, the solenoid valve 5 is energized to open the pneumatic valve, and the heating pipeline introduces a heat source to heat the liquid medicine. When heating needs to be stopped, the solenoid valve 5 is de-energized to close the pneumatic valve, cutting off the supply of the heat source. By adopting the combination of the pneumatic valve and the solenoid valve 5, the on-off of the heating pipeline can be controlled more flexibly, improving the reliability and stability of the system.

[0043] Furthermore, referring to Figure 2 , an installation bracket 41 is provided on the control valve 4, and the solenoid valve 5 is fixedly connected to the installation bracket 41; a connecting pipe 6 is provided between the solenoid valve 5 and the control valve 4, and the solenoid valve 5 and the control valve 4 are connected through the connecting pipe 6. In addition, the connecting pipe 6 is set as a rigid pipe, such as a metal pipe, etc., to enhance the stability of the connection between the solenoid valve 5 and the pneumatic control valve 4.

[0044] As a further improvement of the embodiment of the present application, referring to Figure 1 , the automatic temperature control device for the precipitation preparation tank further adds a detection module 7 and an alarm 8, so as to realize the automatic monitoring of the automatic temperature control device for the precipitation preparation tank and ensure the stable operation of the automatic temperature control device for the precipitation preparation tank.

[0045] Specifically, the detection module 7 includes a main control board 71 and a working detection unit 72. The main control board 71 is electrically connected to the temperature sensor probe 2 to receive the temperature signal. The working detection unit 72 is electrically connected to the power supply line of the circulation pump 3, and judges whether the circulation pump 3 is working normally by detecting the working current and generates a detection signal. The main control board 71 is connected to the working detection unit 72 to receive the detection signal.

[0046] When the circulation pump 3 needs to be started and the liquid medicine is heated, if the circulation pump 3 is not started, the temperature of the liquid medicine will continue to drop below the set temperature, and at the same time, the working current of the circulation pump 3 is abnormal. At this time, the temperature sensor probe 2 transmits an abnormal temperature signal to the main control board 71, the working detection unit 72 outputs an abnormal detection signal to the main control board 71, and the alarm 8 is electrically connected to the main control board 71, so that the main control board 71 can output an alarm signal and start the alarm 8 to give an alarm, reminding the operator to handle the abnormal situation in time. When the temperature is high and heating needs to be stopped, if the detection module 7 detects that the circulation pump 3 is still working, it can also be processed in time to avoid overheating of the liquid medicine.

[0047] In this way, faults in the system can be discovered and processed in time, improving the safety and reliability of the system. In addition, the main control board 71 can also be connected to a display device, and present the abnormal detection signal to the staff through the display device, improving the intuitiveness.

[0048] Specifically, the working detection unit 72 includes a Hall sensor 721 and a signal conditioning circuit 722. The Hall sensor 721 is installed on the power line of the circulation pump 3. When the circulation pump 3 starts, current passes through the Hall sensor 721. The Hall sensor 721 detects the current and outputs a detection signal. The signal conditioning circuit 722 is electrically connected to the Hall sensor 721 to amplify and filter the detection signal and then send it to the main control board 71.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An automatic temperature control device for a precipitation preparation tank, characterized in that Including: A dead-band control temperature controller (1) for setting the heating temperature and the dead-band value, and outputting a control signal according to the received temperature signal; A temperature sensor probe (2) arranged in the circulation pipeline for detecting the heating temperature of the liquid medicine and outputting the detected temperature signal to the dead-band control temperature controller (1); A circulation pump (3) arranged on the circulation pipeline for driving the liquid medicine to circulate, and receiving the control signal of the dead-band control temperature controller (1) to realize opening or closing; A control valve (4) arranged on the heating pipeline for controlling the on-off of the heating pipeline, and receiving the control signal of the dead-band control temperature controller (1) to realize opening or closing.

2. The automatic temperature control device for the precipitation preparation tank according to claim 1, wherein The control valve (4) is an electric valve.

3. The automatic temperature control device for the precipitation preparation tank according to claim 1, characterized in that, The control valve (4) is a pneumatic valve, and a solenoid valve (5) is installed on the control pipeline of the pneumatic valve for receiving the control signal of the dead-band control temperature controller (1) and controlling the operation of the pneumatic valve.

4. The automatic temperature control device for the precipitation preparation tank according to claim 3, wherein, An installation bracket (41) is arranged on the control valve (4), and the solenoid valve (5) is fixedly connected to the installation bracket (41); a connecting pipe (6) is arranged between the solenoid valve (5) and the control valve (4), and the solenoid valve (5) is connected to the control valve (4) through the connecting pipe (6).

5. The automatic temperature control device for the precipitation preparation tank according to claim 4, characterized in that, The connecting pipe (6) is set as a rigid pipe.

6. The automatic temperature control device for the precipitation preparation tank according to claim 1, characterized in that, It further includes a detection module (7), the detection module (7) includes a main control board (71) and a working detection unit (72), the main control board (71) is electrically connected to the temperature sensor probe (2) to receive the temperature signal; the working detection unit (72) is electrically connected to the circulation pump (3) to detect whether the circulation pump (3) is operating; the working detection unit (72) is also electrically connected to the main control board (71) to transmit an electrical signal.

7. The automatic temperature control device for the precipitation preparation tank according to claim 6, wherein The working detection unit (72) includes a Hall sensor (721) and a signal conditioning circuit (722); The Hall sensor (721) is connected to the power supply line of the circulation pump (3) to detect the working current signal of the circulation pump (3); The signal conditioning circuit (722) is electrically connected to the Hall sensor (721) to filter and amplify the current signal; The main control board (71) is electrically connected to the signal conditioning circuit (722) to receive the current signal.

8. The automatic temperature control device for the precipitation preparation tank according to claim 6, characterized in that, It further includes an alarm (8), and the alarm (8) is electrically connected to the main control board (71) for alarming when the circulation pump (3) malfunctions or the liquid medicine temperature is abnormal.

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