CN114863785A - Chemical instrument cognitive experimental device - Google Patents

Abstract

The invention provides a chemical instrument cognitive experiment device, including a main water tank and an instrument panel. By using the latest intelligent paperless recorder as a display instrument, the instrument not only has the functions of signal detection and display, but also has control and alarm functions It can realize multiple experimental functions, and the instrument adopts advanced digital technology, and its corresponding interface is the current mainstream form, students can intuitively understand the automatic control technology in the modern production process during the experiment. Understand the basic concepts and methods of configuration settings, students can independently set the instruments, experience the working methods and ideas of field operators and maintenance personnel, and learn and master the measurement instruments for physical quantities such as pressure, flow, level and temperature commonly used in the chemical industry And use methods, understand the process and steps of meter calibration, understand the steps of meter calibration, understand the compensation wire technology in thermocouple temperature measurement, understand the different technologies of over-limit alarm.

Description

A chemical instrument cognitive experiment device

technical field

The invention relates to the technical field of experimental equipment, in particular to a cognitive experimental device for chemical instruments.

Background technique

Automation technology is one of the high-tech technologies that attract worldwide attention, and it is also a high-tech field that my country will focus on developing in the future. Chemical automation is an abbreviation for the automation of production processes of chemical, oil refining, food, light industry and other chemical types. Due to the development of modern automation technology, in the chemical industry, production technology, equipment, control and management have gradually become an organic whole. Therefore, chemical instrumentation and automation courses are generally offered in chemical engineering majors in major colleges and universities across the country. At present, the experimental instruments serving the teaching of this course are relatively scarce, and the existing equipment has three shortcomings and limitations: 1. Emphasis on the experimental teaching of the automatic control process, while the cognition of the detection instruments and display instruments is less reflected; During the experiment, students cannot deeply understand how the automatic control process is realized through the feedback of the detection instrument, but in actual production, they may not be able to correctly select and apply the instrument because they do not understand the detection instrument; 2 The devices of the instrument cognitive experiment are generally only It can realize the measurement and cognition of a type of physical quantity. In the process of chemical production, physical quantities such as pressure, flow rate, temperature, and material level are all important measurands. Students cannot obtain a macro understanding of chemical instruments during the experiment; 3. The principles of the existing experimental devices are mostly based on the equipment developed in the era of analog electronic technology. In recent years, the rapid development of digital electronic technology, analog instruments have been widely replaced by digital instruments, and the functions of modern instruments are more comprehensive and complex. The use of analog instruments for experimental teaching will easily make the students' learning out of touch with the actual production, and provide limited help for them to engage in professional work. In order to solve the above problems, we provide a chemical instrument cognitive experimental device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a chemical instrument cognitive experiment device in view of the deficiencies existing in the use of the current chemical instrument cognition experiment device.

In order to overcome the deficiencies of the prior art, the present invention adopts the following technical solutions:

A chemical instrument cognitive experiment device, comprising a main water tank and an instrument panel, a U-shaped heating rod is bolted on the inside of the main water tank, a glass tube liquid level gauge is bolted on one side of the main water tank, and the main water tank is A differential pressure liquid level gauge is bolted on one side of the main water tank, a PT100 platinum resistance sensor is installed on the top of the main water tank, a K-type thermocouple is installed on the top of the main water tank, and an E-type thermocouple is installed on the top of the main water tank. Even, one side of the main water tank is provided with an auxiliary water tank, the top of the main water tank is connected with a first connecting pipe, the inside of the first connecting pipe is installed with a turbine flowmeter, and the inside of the first connecting pipe is installed There is a rotameter, a pressure transmitter is installed inside the first connecting pipe, an electrical contact pressure gauge is installed inside the first connecting pipe, and a fourth connecting pipe is connected to the bottom of the first connecting pipe, The other end of the fourth connecting pipe is communicated with the auxiliary water tank, one end of the first connecting pipe is communicated with a booster pump, one side of the booster pump is communicated with a second connecting pipe, and the second connecting pipe is connected to the second connecting pipe. The other end is communicated with the main water tank, the top of the second connection pipe is communicated with a third connection pipe, and the other end of the third connection pipe is communicated with the auxiliary water tank.

Optionally, a frequency meter is provided on the front of the instrument panel, and the back of the frequency meter is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with a paperless recorder, and the back of the paperless recorder is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with a wiring plug, and the back of the wiring plug is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with a 24V power supply, and the back of the 24V power supply is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with an alarm contact, and the back of the alarm contact is installed with the instrument panel.

Optionally, a sound and light alarm is provided on the front of the instrument panel, and the back of the sound and light alarm is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with a recorder button, and the back of the recorder button is installed with the instrument panel.

Optionally, the front of the instrument panel is provided with a master switch button, and the back of the recorder button is installed with the instrument panel.

Optionally, a water pump button is installed on the front of the instrument panel, and a heating button is installed on the front of the instrument panel.

The beneficial effects obtained by the present invention are:

1. By using the latest intelligent paperless recorder as a display instrument, the instrument not only has the functions of signal detection and display, but also has control and alarm functions, and can realize multi-experiment functions, and the instrument adopts advanced digital technology. The corresponding interface is the current mainstream form, and students can intuitively understand the automatic control technology in the modern production process during the experiment;

2. Understand the basic concepts and methods of configuration settings, students can set up the instrument independently, and experience the working methods and ideas of on-site operation and maintenance personnel;

3. Learn and master the measurement instruments and usage methods of physical quantities such as pressure, flow rate, level and temperature commonly used in the chemical industry, understand the process and steps of instrument calibration, understand the steps of instrument calibration, and understand the compensation wire technology in thermocouple temperature measurement , to understand the different technologies of overrun alarm;

4. Able to use intelligent instruments, detection instruments and execution units to form a closed-loop control system, understand the basic principles of classic PID control, intuitively feel the advantages and disadvantages of proportional, integral and differential control and the strategies that should be adopted in specific applications.

Description of drawings

The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

Fig. 1 is the front view of the structure of the present invention;

Figure 2 is a front view of the structure of the present invention.

Description of reference symbols: 1-electric contact pressure gauge; 2-pressure transmitter; 3-rotameter; 4-turbine flowmeter; 5-PT100 platinum resistance sensor; 6-K thermocouple; 7-E thermocouple Couple; 8-glass tube level gauge; 9-differential pressure level gauge; 10-U type heating rod; 11-booster pump; 12-auxiliary water tank; 13-main water tank; 14-first connecting pipe; 15 -Second connection pipe; 16-Third connection pipe; 17-Fourth connection pipe; 18-Instrument panel; 19-Frequency meter; 20-Paperless recorder; 21-Connection plug; Contact; 24- sound and light alarm; 25- recorder button; 26- master switch button; 27- water pump button; 28- heating button.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with its embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention, not to limit the present invention. invention. Other systems, methods and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the present invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in the following detailed description and will be apparent from the following detailed description.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms “upper”, “lower”, “left” and “right” are used The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or component must have a specific orientation. Orientation structure and operation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on the present patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

Embodiment 1: A chemical instrument cognitive experiment device, including a main water tank 13 and an instrument panel 18, a U-shaped heating rod 10 is bolted to the main water tank 13, and a glass tube liquid level gauge is bolted to one side of the main water tank 13 8. A differential pressure liquid level gauge 9 is bolted on one side of the main water tank 13, a PT100 platinum resistance sensor 5 is installed on the top of the main water tank 13, a K-type thermocouple 6 is installed on the top of the main water tank 13, and the top of the main water tank 13 is installed An E-type thermocouple 7 is installed, an auxiliary water tank 12 is arranged on one side of the main water tank 13, a first connecting pipe 14 is communicated with the top of the main water tank 13, and a turbine flowmeter 4 is installed inside the first connecting pipe 14. The first connection A rotameter 3 is installed inside the pipe 14 , a pressure transmitter 2 is installed inside the first connecting pipe 14 , an electrical contact pressure gauge 1 is installed inside the first connecting pipe 14 , and the bottom of the first connecting pipe 14 communicates with The fourth connecting pipe 17, the other end of the fourth connecting pipe 17 is communicated with the auxiliary water tank 12, one end of the first connecting pipe 14 is communicated with the booster pump 11, and one side of the booster pump 11 is communicated with the second connecting pipe 15. The other end of the second connecting pipe 15 is communicated with the main water tank 13 , the top of the second connecting pipe 15 is communicated with a third connecting pipe 16 , and the other end of the third connecting pipe 16 is communicated with the auxiliary water tank 12 .

The frequency meter 19 is provided on the front surface of the meter panel 18 , and the back surface of the frequency meter 19 is attached to the meter panel 18 . The paperless recorder 20 is provided on the front of the instrument panel 18 , and the back of the paperless recorder 20 is attached to the instrument panel 18 . The front surface of the instrument panel 18 is provided with a wiring plug 21 , and the rear surface of the wiring plug 21 is attached to the instrument panel 18 . A 24V power supply 22 is provided on the front of the instrument panel 18 , and the back of the 24V power supply 22 is mounted on the instrument panel 18 . The front of the instrument panel 18 is provided with an alarm contact 23 , and the rear of the alarm contact 23 is mounted on the instrument panel 18 . The front of the instrument panel 18 is provided with an audible and visual alarm 24 , and the rear of the audible and visual alarm 24 is installed with the instrument panel 18 . A recorder button 25 is provided on the front of the instrument panel 18 , and the back of the recorder button 25 is attached to the instrument panel 18 . The front of the instrument panel 18 is provided with a master switch button 26 , and the back of the recorder button 25 is attached to the instrument panel 18 . A water pump button 27 is mounted on the front of the instrument panel 18 , and a heating button 28 is mounted on the front of the instrument panel 18 .

Embodiment 2: This embodiment should be understood to include at least all the features of any one of the foregoing embodiments, and further improve on the basis thereof. Specifically, a chemical instrument cognitive experiment device is provided, including a main water tank 13 and an instrument The panel 18, the U-shaped heating rod 10 is bolted on the inside of the main water tank 13, the glass tube liquid level gauge 8 is bolted on one side of the main water tank 13, and the differential pressure liquid level gauge 9 is bolted on one side of the main water tank 13, A PT100 platinum resistance sensor 5 is installed on the top of the main water tank 13, a K-type thermocouple 6 is installed on the top of the main water tank 13, an E-type thermocouple 7 is installed on the top of the main water tank 13, and an auxiliary water tank 12 is installed on one side of the main water tank 13. , the top of the main water tank 13 is communicated with a first connecting pipe 14, the turbine flowmeter 4 is installed inside the first connecting pipe 14, the rotameter 3 is installed inside the first connecting pipe 14, and the inside of the first connecting pipe 14 is installed There is a pressure transmitter 2, an electrical contact pressure gauge 1 is installed inside the first connecting pipe 14, a fourth connecting pipe 17 is communicated with the bottom of the first connecting pipe 14, and the other end of the fourth connecting pipe 17 is communicated with the auxiliary water tank 12 One end of the first connecting pipe 14 is communicated with the booster pump 11, one side of the booster pump 11 is communicated with the second connecting pipe 15, the other end of the second connecting pipe 15 is communicated with the main water tank 13, and the second connecting pipe 15 is connected to the main tank 13. A third connecting pipe 16 is communicated with the top, and the other end of the third connecting pipe 16 is communicated with the auxiliary water tank 12 . Specifically, the device is equipped with two sinks, one main and one auxiliary. Among them, the main water tank 13 can be pre-filled with about 1/3-1/2 of water, combined with the booster pump 11 to realize the cognition and related experiments of pressure and flow meters; the main water tank 13 also has a U-shaped heating rod 10, combined with thermal resistance The PID output port of the thermometer and the paperless recorder 20 realizes the temperature control function, so as to carry out the cognition and related experiments of the thermocouple and the thermal resistance. The auxiliary water tank 12 can adjust the liquid level of the main water tank 13 through the opening and closing and adjustment of the valve, so as to complete the cognition of the liquid level instrument and related experiments. The device also realizes the alarm function through the electric contact pressure gauge 1, the liquid level sensing switch and the paperless recorder 20, respectively. The instrument panel 18 of the device is mainly divided into three areas, the upper left part is the display instrument area, and the frequency meter 19 and the paperless recorder 20 are arranged respectively. The lower left part is the wiring area. This area is pre-installed with U-shaped terminal sockets, which can facilitate students to connect the instrument. The basic wiring diagram is screen-printed in this area, which can assist students to make independent connections in combination with the experimental lecture notes. At the same time, this area is equipped with 22 areas of 24V power supply. , to facilitate the connection of the required power supply of the active instrument; a group of alarm contacts 23 are set in this area, and the alarm function experiment of the electric contact pressure gauge 1 and the liquid level switch can be carried out. In addition, the alarm is also connected in parallel with the alarm relay of the paperless recorder 20 For the output contact, the alarm function can be set through the configuration of the paperless recorder 20 . The upper right area is the switch area, where switches of related devices are arranged.

The experimental contents that can be carried out by this device are as follows:

1. Learn the use and signal recording of intelligent paperless recorders

Master the configuration setting method, and be able to independently set the corresponding configuration for instrument data recording, equipment control and data copying.

2. The use of spring tube pressure gauge and pressure transmitter

(1) Master the wiring method of the pressure transmitter that outputs the standard signal (4-20mA current signal) and the configuration setting method on the paperless recorder. The instrument leads are not connected to the instrument before the start of the experiment. Learning, find the correct port on the panel to connect the instrument, and correctly set the type, range, unit and other configurations of the signal input on the display instrument, so as to realize the automatic recording of the pressure value by the paperless recorder;

(2) Learn how to adjust the zero and range of the instrument, and use the zero and range potentiometers, as well as the zero correction function of the paperless recorder, to calibrate the instrument. Adjust the pipeline valve to change the pressure in the pipeline, measure the output display of the pressure transmitter at 5 pressure points (based on the electric contact pressure gauge), judge whether the zero point has shifted and whether the range needs to be adjusted, and through the zero adjustment and adjustment Range potentiometer to correct it;

(3) Master the upper and lower limit alarm methods and adjustment methods of the electric contact pressure gauge, can adjust two different pressure ranges, and can use the electric contact pressure gauge to realize the sound and light alarm when the system exceeds the pressure range;

3. Use of rotameter and turbine flowmeter

(1) Master the principle and usage of the rotameter, and read the flow in the pipeline correctly;

(2) Understand the measurement principle of the turbine flowmeter, and determine the speed-flow curve of the turbine flowmeter through experiments (based on the flow indication of the rotor flowmeter), and obtain the flow coefficient of the meter.

4. The use of differential pressure liquid level sensor

(1) Master the use of the differential pressure liquid level sensor (using 1-5V signal output), compare the wiring difference between it and the 4-20mA pressure transmitter, master the similarities and differences between the two-wire and three-wire instruments in the wiring and observe The situation of the migration and the corresponding change of the electrical signal, the correct liquid level value can be obtained by correctly migrating the zero point.

5. Use of thermocouple and thermal resistance and PID control

(1) Correctly connect the thermocouple (K type, E type) with the thermal resistance and the paperless recorder, read the temperature value, and compare the temperature measurement characteristics of the three temperature sensors;

(2) Understand the function and characteristics of thermocouple compensation wires;

(3) Master the use of the PID control function of the paperless recorder, adjust the three parameters of proportional coefficient, integral time and differential time respectively, and further understand the influence of proportional, integral and differential control functions on the control system.

(4) Master the use of the self-tuning function of the PID parameters of the instrument, and compare the changes of the system temperature before and after the tuning.

The frequency meter 19 is provided on the front surface of the meter panel 18 , and the back surface of the frequency meter 19 is attached to the meter panel 18 . Specifically, by setting the frequency table 19, it is possible to facilitate the user's observation.

The paperless recorder 20 is provided on the front of the instrument panel 18 , and the back of the paperless recorder 20 is attached to the instrument panel 18 . Specifically, by setting the paperless recorder 20 , the observation by the user can be facilitated.

The front surface of the instrument panel 18 is provided with a wiring plug 21 , and the rear surface of the wiring plug 21 is attached to the instrument panel 18 . Specifically, by arranging the wiring plug 21, it is convenient for the user to connect.

A 24V power supply 22 is provided on the front of the instrument panel 18 , and the back of the 24V power supply 22 is mounted on the instrument panel 18 . Specifically, by setting the 24V power supply 22, it is convenient for the user to connect.

The front of the instrument panel 18 is provided with an alarm contact 23 , and the rear of the alarm contact 23 is mounted on the instrument panel 18 . Specifically, by setting the alarm contact 23, it is convenient for the user to connect.

The front of the instrument panel 18 is provided with an audible and visual alarm 24 , and the rear of the audible and visual alarm 24 is installed with the instrument panel 18 . Specifically, by setting the sound and light alarm device 24, the sound and light alarm can be effectively performed.

A recorder button 25 is provided on the front of the instrument panel 18 , and the back of the recorder button 25 is attached to the instrument panel 18 . Specifically, by setting the recorder button 25, the recorder can be conveniently controlled.

The front of the instrument panel 18 is provided with a master switch button 26 , and the back of the recorder button 25 is attached to the instrument panel 18 . Specifically, by arranging the master switch button 26, the device can be effectively controlled.

A water pump button 27 is mounted on the front of the instrument panel 18 , and a heating button 28 is mounted on the front of the instrument panel 18 . Specifically, by setting the water pump button 27, the water pump can be started conveniently.

To sum up, the device is equipped with two sinks, one main and one auxiliary. Among them, the main water tank 13 can be pre-filled with about 1/3-1/2 of water, combined with the booster pump 11 to realize the cognition and related experiments of pressure and flow meters; the main water tank 13 also has a U-shaped heating rod 10, combined with thermal resistance The PID output port of the thermometer and the paperless recorder 20 realizes the temperature control function, so as to carry out the cognition and related experiments of the thermocouple and the thermal resistance. The auxiliary water tank 12 can adjust the liquid level of the main water tank 13 through the opening and closing and adjustment of the valve, so as to complete the cognition of the liquid level instrument and related experiments. The device also realizes the alarm function through the electric contact pressure gauge 1, the liquid level sensing switch and the paperless recorder 20, respectively. The instrument panel 18 of the device is mainly divided into three areas, the upper left part is the display instrument area, and the frequency meter 19 and the paperless recorder 20 are arranged respectively. The lower left part is the wiring area. This area is pre-installed with U-shaped terminal sockets, which can facilitate students to connect the instrument. The basic wiring diagram is screen-printed in this area, which can assist students to make independent connections in combination with the experimental lecture notes. At the same time, this area is equipped with 22 areas of 24V power supply. , to facilitate the connection of the required power supply of the active instrument; a group of alarm contacts 23 are set in this area, and the alarm function experiment of the electric contact pressure gauge 1 and the liquid level switch can be carried out. In addition, the alarm is also connected in parallel with the alarm relay of the paperless recorder 20 For the output contact, the alarm function can be set through the configuration of the paperless recorder 20 . The upper right area is the switch area, where switches of related devices are arranged.

While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That said, the methods, systems and apparatus discussed above are examples. Various configurations may omit, substitute or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different from that described, and/or various components may be added, omitted, and/or combined. Furthermore, features described with respect to certain configurations may be combined in various other configurations, eg, different aspects and elements of the configurations may be combined in a similar manner. Furthermore, elements therein may be updated as technology develops, ie, many of the elements are examples and do not limit the scope of the disclosure or the claims.

Specific details are given in the description to provide a thorough understanding of example configurations, including implementations. However, configurations may be practiced without these specific details. For example, well-known circuits, procedures, algorithms, structures and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing descriptions of configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.

In conclusion, it is intended that the above detailed description is to be considered as illustrative rather than restrictive, and it should be understood that these embodiments above should be understood to be merely illustrative of the present invention and not intended to limit the scope of protection of the present invention. After reading the contents of the description of the present invention, the skilled person can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims (10)

1. The utility model provides a cognitive experimental apparatus of chemical industry instrument, a serial communication port, including main water tank (13) and instrument panel (18), the inside bolt of main water tank (13) has U type heating rod (10), one side bolt of main water tank (13) has glass pipe level gauge (8), one side bolt of main water tank (13) has differential pressure type level gauge (9), PT100 platinum resistance sensor (5) are installed at the top of main water tank (13), K type thermocouple (6) are installed at the top of main water tank (13), E type thermocouple (7) are installed at the top of main water tank (13), one side of main water tank (13) is provided with auxiliary water tank (12), the top intercommunication of main water tank (13) has first connecting pipe (14), the internally mounted of first connecting pipe (14) has turbine flowmeter (4), the internally mounted of first connecting pipe (14) has rotor flow meter (3), the internally mounted of first connecting pipe (14) has pressure transmitter (2), the internally mounted of first connecting pipe (14) has electric contact pressure table (1), the bottom intercommunication of first connecting pipe (14) has fourth connecting pipe (17), the other end and auxiliary water tank (12) intercommunication of fourth connecting pipe (17), the one end intercommunication of first connecting pipe (14) has booster pump (11), one side intercommunication of booster pump (11) has second connecting pipe (15), the other end and main water tank (13) intercommunication of second connecting pipe (15), the top intercommunication of second connecting pipe (15) has third connecting pipe (16), the other end and auxiliary water tank (12) intercommunication of third connecting pipe (16).

2. The chemical instrument cognitive experiment device according to claim 1, wherein the front surface of the instrument panel (18) is provided with a frequency table (19), and the back surface of the frequency table (19) is mounted with the instrument panel (18).

3. The chemical instrument cognition experiment device according to the claim 1, wherein the front surface of the instrument panel (18) is provided with a paperless recorder (20), and the back surface of the paperless recorder (20) is installed with the instrument panel (18).

4. The chemical instrument cognition experiment device is characterized in that a wiring plug (21) is arranged on the front surface of the instrument panel (18), and the back surface of the wiring plug (21) is installed on the instrument panel (18).

5. The chemical instrument cognitive experiment device according to claim 1, wherein a 24V power supply (22) is arranged on the front surface of the instrument panel (18), and the back surface of the 24V power supply (22) is installed on the instrument panel (18).

6. The chemical instrument cognition experimental device is characterized in that an alarm contact (23) is arranged on the front surface of the instrument panel (18), and the back surface of the alarm contact (23) is installed on the instrument panel (18).

7. The chemical instrument cognition experiment device according to the claim 1, characterized in that the front surface of the instrument panel (18) is provided with an audible and visual alarm (24), and the back surface of the audible and visual alarm (24) is installed with the instrument panel (18).

8. The chemical instrument cognitive experiment device according to claim 1, wherein a recorder button (25) is arranged on the front surface of the instrument panel (18), and the back surface of the recorder button (25) is installed on the instrument panel (18).

9. The chemical industry instrument cognition experiment device according to the claim 8, characterized in that, the front of the instrument panel (18) is provided with a main switch button (26), and the back of the recorder button (25) is installed with the instrument panel (18).

10. The chemical industry instrument cognition experimental device is characterized in that a water pump button (27) is installed on the front face of the instrument panel (18), and a heating button (28) is installed on the front face of the instrument panel (18).

Images