Three-control three-measurement type temperature control device and method

Abstract

The invention provides a three-control three-measurement type temperature control device and method, and is applied to the field of high-temperature furnace temperature control in a material high-temperature mechanical test. The three-control three-measurement type temperature control device comprises a box body and a high-temperature furnace, side plates are installed on the two sides of the outer wall of the box body through bolts, a control instrument is installed at the position, close to the upper end, of the front end face of the box body in an embedded mode, an installation plate is installed on one side of the interior of the box body through bolts, and an input and output control conversion circuit is fixedly arranged on the installation plate. Three temperature measuring ports and three temperature control ports are respectively arranged on two sides of the rear end face of the box body close to the upper end, and a power input end and a power output end are respectively arranged on two sides of the rear end face of the box body close to the lower end. A traditional mode that temperature control is conducted by adopting feedback of sample temperature all the time is abandoned, the rapid temperature rising principle of an air preheating technology is innovatively introduced, switching is conducted between the air temperature and the sample temperature, and rapid and accurate control over the sample temperature is achieved.

Description

Technical Field

[0001] The present invention is a device for temperature control of a high-temperature furnace in high-temperature mechanical tests of materials, specifically a three-control and three-measurement temperature control device and method. Background Art

[0002] During the high-temperature mechanical test of metal materials, the accuracy, stability, and heating efficiency of the high-temperature furnace temperature control have a great impact on the test results and test efficiency. Traditional high-temperature furnace temperature control systems generally use three control instruments and three temperature sensors for temperature PID closed-loop control, which belongs to the temperature measurement and control integrated temperature measurement and control method. At the present stage, the research and development of high-temperature mechanics of materials are changing with each passing day. The traditional temperature control method cannot meet the current refined and diversified test requirements. The traditional control system has the following problems to be solved urgently:

[0003] 1. The temperature control accuracy is poor and the stability is insufficient. During use, temperature overshoot, fluctuation exceeding the range, and temperature deviation not meeting the standard often occur;

[0004] 2. The heating efficiency is poor, and the heating time is generally 1 hour or even longer, resulting in extremely low overall test efficiency. Moreover, due to the large energy consumption caused by the heating efficiency problem, it does not conform to the current trend of industrial green and sustainable development;

[0005] 3. There is no protection measure for the upper temperature limit of the heating wire. When the sample temperature needs to reach a relatively extreme temperature, the heating wire temperature will be much higher than the extreme temperature, and it is easy to reach the molten state of the heating wire, affecting the service life of the high-temperature furnace;

[0006] 4. Traditional temperature controllers mostly have single-type sensor channel interfaces and cannot be compatible with multiple types of sensor interfaces at the same time. If other types of sensors need to be replaced, it is necessary to disassemble the controller and replace the special sensor cable, which is time-consuming and laborious. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a three-control and three-measurement temperature control device, including a box body and a high-temperature furnace. Both sides of the outer wall of the box body are installed with side plates through bolts. A control instrument is embedded and installed at the upper end of the front end face of the box body. An installation plate is installed on one side inside the box body through bolts. An input-output control conversion circuit is fixedly arranged on the installation plate. Three temperature measurement ports and three temperature control ports are respectively arranged on both sides at the upper end of the rear end face of the box body. A power input terminal and a power output terminal are respectively arranged on both sides at the lower end of the rear end face of the box body;

[0008] Six temperature sensors are evenly arranged on the inner wall of the high-temperature furnace. Among them, three temperature sensors are respectively connected to three temperature measurement ports and are responsible for measuring the temperature of the sample placed in the high-temperature furnace. The other three temperature sensors are respectively connected to three temperature control ports and assist in controlling the temperature in the high-temperature furnace and protecting the upper limit of the heating element temperature. Multiple resistance heating wires are arranged on the inner wall of the high-temperature furnace and are divided into upper, middle, and lower sections and are evenly distributed inside the high-temperature furnace.

[0009] Preferably, among the six temperature sensors, the three temperature sensors for temperature measurement respectively correspond to the temperature measurement of the upper, middle, and lower heating wire regions; and the other three temperature sensors respectively correspond to the temperature control of the upper, middle, and lower heating wire regions.

[0010] Preferably, the control instrument adopts a high-precision multi-channel programmable control instrument and controls the output voltage magnitude through the PID algorithm for temperature control.

[0011] Preferably, an alarm button is installed on one side near the lower end of the front end face of the box body, and start-stop buttons for controlling the start and stop of heating are respectively installed on the other side of the alarm button.

[0012] Preferably, a communication port is installed at the lower end of the three temperature control ports on the rear end face of the box body, and a fuse is installed at the lower end of the three temperature measurement ports on the rear end face of the box body.

[0013] Preferably, a switch is installed at the middle position of the rear end face of the box body above the power input and output ports and below the fuse and the communication port.

[0014] Preferably, the three temperature control ports and the three temperature measurement ports are all installed in an equidistant arrangement in the vertical direction and are divided into upper, middle, and lower parts.

[0015] Preferably, both the power input end and the power output end are connected to an input-output control conversion circuit arranged inside, and the input-output control conversion circuit is electrically connected to the control instrument.

[0016] A usage method of a three-control-three-measurement type temperature control device includes the following steps: The control instrument cooperates with the output control voltage of the input-output control conversion circuit to supply power to the resistance heating wires in the high-temperature furnace for heating, so as to heat the sample in the furnace to the target temperature. By dividing the resistance heating wires into upper, middle, and lower sections and evenly arranging them inside the high-temperature furnace, the control instrument feeds back the real-time temperature of the six temperature sensors arranged inside the high-temperature furnace to the temperature measurement and control ports, and controls the voltage magnitude output to the heating wires through the PID algorithm to complete the closed-loop control of the temperature.

[0017] Preferably, the high-temperature furnace performs rapid heating based on air preheating technology; wherein the input-output control conversion circuit outputs the converted control voltage from the power output terminal, and the power output terminal is connected to the voltage input terminal of the high-temperature furnace, and the voltage input terminal of the high-temperature furnace outputs the voltage to the resistance heating wire for heating and temperature rise.

[0018] The present invention provides a three-control and three-measurement type temperature control device and method. It has the following beneficial effects:

[0019] The present invention provides a three-control and three-measurement type temperature control device and method. The present invention abandons the traditional method of controlling temperature by continuously using the feedback of the sample temperature. Through the rapid heating principle of the air preheating technology in the high-temperature furnace, two groups of temperature sensors for temperature measurement and control are switched between the air temperature and the sample temperature to achieve rapid and precise control of the sample temperature, thereby improving the heating efficiency. The redundant arrangement scheme of the sensors ensures the high precision and reliability of temperature measurement. Even in special environments, the output of the sensors can be effectively calibrated to avoid temperature control errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the axonometric structure schematic diagram of the present invention;

[0021] Figure 2 is of the present invention Figure 1 right view structure schematic diagram;

[0022] Figure 3 is of the present invention Figure 2 partial cross-sectional structure schematic diagram;

[0023] Figure 4 is of the present invention Figure 3 structure schematic diagram of another perspective;

[0024] Figure 5 is the internal structure schematic diagram of the present invention;

[0025] Figure 6 is the process framework structure schematic diagram of the present invention.

[0026] Wherein, 1. box body; 2. control instrument; 3. alarm button; 4. start-stop button; 5. input-output control conversion circuit; 6. switch gate; 7. side plate; 8. mounting plate; 9. temperature measurement port; 10. temperature control port; 11. communication port; 12. fuse; 13. power input terminal; 14. power output terminal. DETAILED DESCRIPTION OF THE INVENTION

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] This three-control and three-measurement type temperature control device mainly consists of an electrical component carrier (box body), a high-precision multi-channel programmable control instrument, and electrical components. The control instrument, start / stop and alarm buttons are arranged on the front of the box body, and the power input, control power output, channel interfaces and communication interfaces are arranged on the back of the box body. The input / output control conversion circuit is arranged inside the box body. The overall layout is compact and beautiful, and can easily cope with various installation environments.

[0029] Embodiment:

[0030] As Figures 1 - 5 shown, an embodiment of the present invention provides a three-control and three-measurement type temperature control device, including a box body 1 and a high-temperature furnace. On both sides of the outer wall of the box body 1, side plates 7 are installed by bolts. At the upper end of the front end face of the box body 1, a control instrument 2 is embedded. On one side inside the box body 1, a mounting plate 8 is installed by bolts. An input / output control conversion circuit 5 is fixedly arranged on the mounting plate 8. On both sides of the upper end of the back end face of the box body 1, three temperature measurement ports 9 and three temperature control ports 10 are respectively arranged. On both sides of the lower end of the back end face of the box body 1, a power input end 13 and a power output end 14 are respectively arranged;

[0031] Specifically, the side plates 7 installed based on bolts on both sides are one on the left and one on the right and can be quickly disassembled for use, which is convenient for internal maintenance. The mounting plate 8 is located at the position of the side plate 7 on the right side, and the side plate 7 on the right side can also provide a protective effect on the mounting plate 8; the control instrument 2 adopts a high-precision multi-channel programmable control instrument and controls the output voltage magnitude through the PID algorithm to control the temperature, thus providing great help for the rapid and stable heating of the sample, and improving the test efficiency.

[0032] In this solution, six temperature sensors are evenly arranged on the inner wall of the high-temperature furnace. Among them, three temperature sensors are respectively connected to the three temperature measurement ports 9 and are responsible for measuring the temperature of the sample placed in the high-temperature furnace. The other three temperature sensors are respectively connected to the three temperature control ports 10 and assist in controlling the temperature in the high-temperature furnace and protecting the upper limit of the heating element temperature; a plurality of resistance heating wires are arranged on the inner wall of the high-temperature furnace and are divided into upper, middle and lower sections and are evenly distributed inside the high-temperature furnace; the three temperature sensors for temperature measurement among the six temperature sensors respectively correspond to the temperature measurement of the upper, middle and lower sections of the heating wire areas; and the other three temperature sensors respectively correspond to the temperature control of the upper, middle and lower sections of the heating wire areas.

[0033] Specifically, dividing the six temperature sensors into two groups of different types of sensors is conducive to implementing the separation of measurement and control. At the same time, the multi-channel interface adopted on the box body 1 can meet the simultaneous access of six sensors, saving installation control. The controller is light and beautiful and can be easily mounted on the device; that is, the dual-type sensor channel interface adopted can meet the use of two common sensor types.

[0034] Refer to Figures 1 - 5 , an alarm button 3 is installed on one side near the lower end of the front end face of the box body 1, and a start-stop button 4 for controlling the start and stop of heating is installed on the other side of the alarm button 3; a switch gate 6 is installed at the middle position of the rear end face of the box body 1 above the power input and output ports and below the fuse 12 and the communication port 11.

[0035] Specifically, it can achieve fast start-stop control and the on-off effect of power input; at the same time, the added alarm button 3 can achieve one-key alarm effect, making it more convenient to use.

[0036] Refer to Figure 4 , a communication port 11 is installed at the lower end of the three temperature control ports 10 on the rear end face of the box body 1, and a fuse 12 is installed at the lower end of the three temperature measurement ports 9 on the rear end face of the box body 1;

[0037] Specifically, based on the setting of the communication port 11, the communication connection between the internal electrical components of the box body 1 and the internal components of the high-temperature furnace is realized, and the setting of the fuse 12 plays a protective role, reducing the occurrence of accidental damage.

[0038] Refer to Figure 3 , the three temperature control ports 10 and the three temperature measurement ports 9 are all installed in an equally spaced arrangement in the vertical direction and are divided into upper, middle, and lower parts;

[0039] Specifically, arranging the two groups of ports vertically at equal intervals not only makes the arrangement and installation clearer and neater, but also facilitates inspection and search, with better organization.

[0040] Both the power input terminal 13 and the power output terminal 14 are connected to the input-output control conversion circuit 5 provided inside, and the input-output control conversion circuit 5 is electrically connected to the control instrument 2; that is, when in use, after the voltage is connected through the power input terminal 13 and transmitted to the internal input-output control conversion circuit 5, the input-output control conversion circuit 5 converts the input voltage according to the detected temperature data, and then the converted voltage is output from the power output terminal 14 to complete the timely conversion control output.

[0041] Refer to Figure 6, this embodiment provides a method for using a three-control and three-measure temperature control device, including the following steps: The control instrument cooperates with the output control voltage of the input-output control conversion circuit to supply power to the resistance heating wire in the high-temperature furnace for heating, so as to heat the sample in the furnace to the target temperature. By dividing the resistance heating wire into upper, middle, and lower sections and evenly arranging them in the high-temperature furnace, the control instrument feeds back the real-time temperature of the six temperature sensors arranged inside the high-temperature furnace to the temperature measurement and control ports, and completes the closed-loop control of the temperature by controlling the voltage output to the heating wire through the PID algorithm. The high-temperature furnace is rapidly heated based on the air preheating technology; among them, the input-output control conversion circuit outputs the converted control voltage from the power supply output terminal, and the power supply output terminal is connected to the voltage input terminal of the high-temperature furnace, and the voltage input terminal of the high-temperature furnace outputs the voltage to the resistance heating wire for heating and temperature rise.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-control and three-measurement type temperature control device, comprising a box body (1) and a high-temperature furnace, characterized in that: On both sides of the outer wall of the box body (1), side plates (7) are installed by bolts. At the upper end of the front face of the box body (1), a control instrument (2) is embedded. On one side inside the box body (1), a mounting plate (8) is installed by bolts. An input-output control conversion circuit (5) is fixedly arranged on the mounting plate (8). On both sides of the upper end of the rear face of the box body (1), three temperature measurement ports (9) and three temperature control ports (10) are respectively arranged. At both sides of the lower end of the rear face of the box body (1), a power input terminal (13) and a power output terminal (14) are respectively arranged. Six temperature sensors are evenly arranged on the inner wall of the high-temperature furnace. Three of the temperature sensors are respectively connected to the three temperature measurement ports (9) and are responsible for measuring the temperature of the sample placed in the high-temperature furnace. The other three temperature sensors are respectively connected to the three temperature control ports (10) and assist in controlling the temperature inside the high-temperature furnace and protecting the upper limit of the temperature of the heating element. Multiple resistance heating wires are arranged on the inner wall of the high-temperature furnace and are divided into upper, middle and lower sections and are evenly distributed inside the high-temperature furnace.

2. The three-control and three-measurement type temperature control device according to claim 1, characterized in that: Among the six temperature sensors, the three temperature sensors for temperature measurement respectively correspond to the temperature measurement of the upper, middle and lower heating wire regions; and the other three temperature sensors respectively correspond to the temperature control of the upper, middle and lower heating wire regions.

3. The three-control and three-measurement type temperature control device according to claim 1, characterized in that: The control instrument (2) adopts a high-precision multi-channel programmable control instrument and controls the output voltage magnitude through the PID algorithm for temperature control.

4. A triple-control and triple-measurement type temperature control device according to claim 1, characterized in that: On one side of the lower end of the front face of the box body (1), an alarm button (3) is installed, and on the other side of the alarm button (3), a start-stop button (4) for controlling the start and stop of heating is respectively installed.

5. A three-control and three-measurement type temperature control device according to claim 1, characterized in that: On the rear face of the box body (1), at the lower end of the three temperature control ports (10), a communication port (11) is installed. On the rear face of the box body (1), at the lower end of the three temperature measurement ports (9), a fuse (12) is installed.

6. A triple-control and triple-measurement type temperature control device according to claim 1, characterized in that: On the rear face of the box body (1), at the middle position above the power input and output ports and below the fuse (12) and the communication port (11), a switch gate (6) is installed.

7. A triple-control and triple-measurement type temperature control device according to claim 1, characterized in that: The three temperature control ports (10) and the three temperature measurement ports (9) are all installed in an equally spaced arrangement in the vertical direction and are divided into upper, middle and lower parts.

8. A triple-control and triple-measurement type temperature control device according to claim 1, characterized in that: The power input terminal (13) and the power output terminal (14) are both connected to the input-output control conversion circuit (5) arranged inside. The input-output control conversion circuit (5) is electrically connected to the control instrument (2).

9. A method for using a temperature control device with three controls and three measurements, characterized in that, Including the following steps: Through the control instrument, the output control voltage of the input-output control conversion circuit is given to the resistance heating wires inside the high-temperature furnace for heating, so as to heat the sample in the furnace to the target temperature. By dividing the resistance heating wires into upper, middle and lower sections and evenly arranging them inside the high-temperature furnace, the control instrument feeds back the real-time temperature of the six temperature sensors arranged inside the high-temperature furnace to the temperature measurement and control ports, and controls the voltage magnitude output to the heating wires through the PID algorithm to complete the closed-loop control of temperature.

10. The usage method of a three-control and three-measurement type temperature control device according to claim 9, characterized in that: The high-temperature furnace performs rapid heating based on air preheating technology; among them, the input-output control conversion circuit outputs the converted control voltage from the power output terminal, and the power output terminal is connected to the voltage input terminal of the high-temperature furnace, and the voltage input terminal of the high-temperature furnace outputs the voltage to the resistance heating wire for heating and temperature rise.

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