Transformation method of ice-cold sample heat treatment equipment

Abstract

The invention discloses a transformation method of ice-cold sample heat treatment equipment. The transformation method comprises the following steps: S1, splitting a control system; an independent temperature control system is arranged to be directly connected with the temperature sensing unit, and the temperature control system independently adjusts the temperature information after receiving the temperature information of the temperature sensing unit; s2, generating control parameters; the temperature control system generates temperature control parameters according to the process parameters in the corresponding process formula and the real-time temperature output by the temperature sensing unit; s3, temperature regulation and control; the temperature control system sends control parameters to the PLC control system in the form of electric signals, and the PLC control system only controls the heating module and the cooling module to work through the received electric signals. The temperature control system independently controls temperature rising and falling, the problem of temperature cross influence or interference in the process that one system controls multiple devices is avoided, and therefore it is guaranteed that the temperature can be independently and accurately controlled in each heat treatment process.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment equipment, and in particular relates to a modification method of ice-cold sample heat treatment equipment. Background Art

[0002] Ice-cold specimen heat treatment equipment is commonly used in materials science and engineering, especially in the field of metallurgy and materials research. Its main function is to simulate different heat treatment processes by controlling the temperature change of the specimen to evaluate the heat treatment effect and performance change of the material.

[0003] The temperature control module, material loading and unloading module, heating and cooling module, etc. of the ice-cold sample heat treatment equipment share a processing system, but the single control system limits the flexibility and adjustment ability in the production process, which will cause temperature instability due to quantity exchange or competition between equipment, resulting in temperature cross-influence between equipment. Summary of the invention

[0004] The present invention aims to solve the problem that a single control system in the prior art may cause temperature instability and cross-effect of temperature between devices due to quantity exchange or competition between devices, and proposes the following technical solution: As a preferred embodiment of the above technical solution, the following steps are included: S1, split control system; An independent temperature control system is set up to be directly connected to the temperature sensing unit, and the temperature control system makes independent adjustments after receiving the temperature information from the temperature sensing unit; S2, generating control parameters; The temperature control system generates temperature control parameters based on the process parameters in the corresponding process recipe and the real-time temperature output by the temperature sensing unit; S3, temperature control; The temperature control system sends the control parameters to the PLC control system in the form of electrical signals. The PLC control system only controls the operation of the heating module and the cooling module through the received electrical signals.

[0005] As a preferred embodiment of the above technical solution, the step S1 further includes temperature determination; S1a: The temperature sensing unit obtains the internal temperature T0 of the equipment and compares the T0 value with the preset value T1 of the temperature control system; S1b: During heating, when the internal temperature of the device T0>T1, the temperature control system determines that the internal temperature of the device has reached the requirement and does not perform corresponding operations; when the internal temperature of the device T0≤T1, the temperature control system determines that the requirement has not been reached and enters step S2; Or S1b: During cooling, when the internal temperature of the equipment is T0≤T1, the temperature control system determines that the internal temperature of the equipment has reached the requirement and does not perform corresponding operations. When the internal temperature of the equipment is T0>T1, the temperature control system determines that the requirement has not been met and enters step S2.

[0006] As a preferred embodiment of the above technical solution, the S3 step also includes heating regulation and cooling regulation. When performing heating regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by controlling the resistance heating temperature and the number of gas supply ports. When performing cooling regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by the cooling compression ratio, the number of compressor operations and the fan speed.

[0007] As a preferred embodiment of the above technical solution, the temperature control system includes a temperature control instrument and an installation component. The temperature control instrument is installed in an installation box of the PLC control system through the installation component. The temperature control instrument is pulled to drive the limit frame to move in the installation frame, and the temperature control instrument is then pulled out of the installation box of the PLC control system.

[0008] As a preferred embodiment of the above technical solution, the installation assembly includes a mounting frame, a connecting piece and a limit frame. The mounting frame is installed on the surface of the installation box of the PLC control system. One end of the limit frame is movably inserted in the mounting frame, and the end of the limit frame is fixedly connected to the connecting piece.

[0009] As a preferred embodiment of the above technical solution, the connecting part includes a socket frame and two mounting blocks, the socket frame is fixedly installed on the surface of the temperature control instrument, and left and right rotating shafts are provided at both ends of the socket frame. Deflection blocks are rotatably socketed on the surfaces of the left and right rotating shafts, and upper and lower limit shafts are fixedly connected to the middle of the deflection block. The upper and lower limit shafts are movably inserted in the corresponding mounting blocks, and the surface of the mounting block is provided with displacement grooves matching the upper and lower limit shafts.

[0010] As a preferred embodiment of the above technical solution, magnetic blocks are provided inside the mounting block and the mounting frame, the two magnetic blocks have opposite magnetic properties, and the mounting block is fixedly connected to the mounting frame via the magnetic blocks.

[0011] As a preferred embodiment of the above technical solution, the surfaces of the left and right rotating shafts are provided with an anti-skid layer, and the surface of the anti-skid layer of the left and right rotating shafts is rough.

[0012] As a preferred embodiment of the above technical solution, a deformable softening layer is provided on the surface of the displacement groove, and the surface of the deformable softening layer of the displacement groove is roughened.

[0013] As a preferred embodiment of the above technical solution, the temperature control system also includes a sealing sheet, which is used to seal the gap between the temperature control instrument and the mounting frame. One end of the sealing sheet is sleeved on the surface of the temperature control instrument, and the other end of the sealing sheet is fixedly connected to the surface of the mounting frame.

[0014] As a preferred embodiment of the above technical solution, the sealing sheet is made of soft rubber material, and the sealing sheet is deformed as the temperature control instrument moves.

[0015] The beneficial effects of the present invention are: 1. The temperature control system can be customized according to specific needs to ensure that the system can accurately meet the temperature requirements of the heat treatment process, whether it is a high temperature or low temperature environment. Because it has its own operation interface and monitoring function, the operator can directly set and adjust the temperature parameters on the system interface, and monitor the temperature changes and system status in real time. In addition, the temperature control system independently controls the temperature rise and fall to avoid the problem of temperature cross-influence or interference when one system controls multiple devices, thereby ensuring that each heat treatment process can independently and accurately control the temperature; 2. Install the temperature control instrument in the installation box of the PLC control system so that the two can share a cooling system to prevent the temperature control instrument from overheating and affecting its own operation. At the same time, the temperature control instrument can be pulled out of the installation box of the PLC control system to facilitate maintenance of the temperature control instrument. 3. The direction of the temperature control instrument can be adjusted through the provided connection parts. It can be adjusted up and down first and then left and right, or it can be adjusted left and right first and then up and down. After the temperature control instrument is adjusted in any direction, it can be convenient for workers of different heights or different workstations to operate and observe, making the use of the temperature control instrument more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a flowchart of an embodiment; Figure 2 What is shown is a schematic diagram of the overall structure of the temperature control system in the embodiment; Figure 3 What is shown is the up and down deflection state diagram of the temperature control instrument in the embodiment; Figure 4 The figure shows the state of the temperature control instrument in the embodiment after the up-down deflection and the left-right deflection; Figure 5 What is shown is the left and right deflection state diagram of the temperature control instrument in the embodiment; Figure 6 The diagram shows the left-right deflection and up-down deflection states of the temperature control instrument in the embodiment; Figure 7 What is shown is a schematic diagram of the structure of each part of the connecting member in the embodiment; Figure 8 Shown is a diagram of the installation position of the sealing sheet in the embodiment.

[0017] In the figure: 10, temperature control instrument; 20, installation assembly; 21, mounting frame; 22, limit frame; 23, connecting parts; 231, sleeve frame; 232, mounting block; 233, left and right rotating shaft; 234, deflection block; 235, upper and lower limit shafts; 236, displacement groove; 30, sealing sheet. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0019] Example Figure 1 A method for modifying an ice-cold sample heat treatment device comprises the following steps: S1, split control system; An independent temperature control system is set up to be directly connected to the temperature sensing unit, and the temperature control system makes independent adjustments after receiving the temperature information from the temperature sensing unit; S2, generating control parameters; The temperature control system generates temperature control parameters based on the process parameters in the corresponding process recipe and the real-time temperature output by the temperature sensing unit; S3, temperature control; The temperature control system sends the control parameters to the PLC control system in the form of electrical signals. The PLC control system only controls the operation of the heating module and the cooling module through the received electrical signals.

[0020] The step S1 also includes temperature determination; S1a: The temperature sensing unit obtains the internal temperature T0 of the equipment and compares the T0 value with the preset value T1 of the temperature control system; S1b: During heating, when the internal temperature of the device T0>T1, the temperature control system determines that the internal temperature of the device has reached the requirement and does not perform corresponding operations; when the internal temperature of the device T0≤T1, the temperature control system determines that the requirement has not been reached and enters step S2; Or S1b: During cooling, when the internal temperature of the equipment is T0≤T1, the temperature control system determines that the internal temperature of the equipment has reached the requirement and does not perform corresponding operations. When the internal temperature of the equipment is T0>T1, the temperature control system determines that the requirement has not been met and enters step S2.

[0021] The S3 step also includes heating regulation and cooling regulation. When performing heating regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by controlling the resistance heating temperature and the number of gas supply ports. When performing cooling regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by the cooling compression ratio, the number of compressor operations and the fan speed.

[0022] When using heat treatment equipment, first set the temperature preset value through the temperature control system, the temperature control system sends an electrical signal to the PLC control system, the PLC control system starts resistance heating and gas supply heating, the temperature sensing unit obtains the internal temperature T0 of the equipment in real time, and compares the T0 value with the temperature preset value T1 of the temperature control system. When the internal temperature of the equipment T0>T1, the temperature control system determines that the internal temperature of the equipment meets the requirements and does not perform corresponding operations. When the internal temperature of the equipment T0≤T1, the temperature control system determines that the requirements are not met and enters step S2. The temperature control system generates temperature control parameters according to the process parameters in the corresponding process formula and the real-time temperature output by the temperature sensing unit. The temperature control system sends the control parameters to the PLC control system in the form of electrical signals. The PLC control system only controls and regulates the resistance heating temperature and gas through the received electrical signals. The number of supply ports is used to quickly heat up. After reaching the target temperature, the equipment will maintain this temperature for a period of time. During this process, the temperature control system detects the internal temperature of the equipment in real time and adjusts it. After the insulation is completed, the cooling work starts. The temperature control system sends an electrical signal to the PLC control system. The PLC control system starts the cooling compression ratio compressor and the fan to cool the inside of the equipment. The temperature sensing unit obtains the internal temperature T0 of the equipment in real time, and compares the T0 value with the preset value T1 of the temperature control system. When the internal temperature of the equipment is T0≤T1, the temperature control system determines that the internal temperature of the equipment has met the requirements and does not perform corresponding operations. When the internal temperature of the equipment is T0>T1, the temperature control system determines that the requirements have not been met and enters step S2. The PLC control system only controls the number of working cooling compression ratio compressors and the fan speed through the received electrical signal to quickly cool down.

[0023] The independently set temperature control system can be customized according to specific needs, ensuring that the system can accurately meet the temperature requirements of the heat treatment process, whether it is a high temperature or low temperature environment. Because it has its own operation interface and monitoring function, the operator can directly set and adjust the temperature parameters on the system interface, and monitor the temperature changes and system status in real time. In addition, the temperature control system independently controls the temperature rise and fall, avoiding the problem of temperature cross-influence or interference when one system controls the process of multiple devices, thereby ensuring that each heat treatment process can independently and accurately control the temperature.

[0024] The operation process of ice-cold sample heat treatment equipment usually includes the following key steps: 1. Preparation: Ensure equipment and specimens are ready, including cleaning specimens and checking equipment safety and operation.

[0025] Set heat treatment parameters, such as target temperature and hold time, and adjust them according to specific heat treatment needs.

[0026] 2. Heating stage: Start the heating equipment and begin heating the sample to the set target temperature. This stage is usually operated according to the set conditions in the heat treatment process chart.

[0027] Monitor and record the temperature changes of the specimen to ensure that the specimen reaches the required heating temperature.

[0028] 3. Insulation stage: When the sample reaches the target temperature, the equipment will maintain this temperature for a period of time, which is called the insulation stage. This process allows the temperature inside the sample to reach a uniform level, ensuring the consistency and integrity of the heat treatment effect.

[0029] 4. Cooling stage: After the holding period is completed, the sample is cooled. The purpose of this stage is to control the cooling rate of the sample and simulate the cooling conditions during different heat treatment processes, such as quenching or annealing.

[0030] Select appropriate cooling medium and rate according to needs to ensure that the microstructure and mechanical properties of the sample reach the expected state.

[0031] 5. Conclusion and analysis: When the specimen has completed the heat treatment process, the equipment is turned off and the specimen is taken out.

[0032] Conduct subsequent microstructure analysis, hardness testing or other performance tests to evaluate the effect of heat treatment and the performance changes of the specimen.

[0033] Record and analyze experimental data to optimize the heat treatment process or carry out further research work.

[0034] Heating equipment is a very critical part of heat treatment equipment. They are responsible for providing the ability to control and manage the temperature of the specimen. The following are some common types of heating equipment in heat treatment equipment: Resistance Heating Furnace: This is one of the most common heating methods for heat treatment equipment. Resistance heating furnaces heat the specimen by passing an electric current through a heating element (usually a resistance wire or a resistance furnace core). They can provide high heating rates and good temperature control, suitable for a variety of heat treatment processes such as annealing, quenching, aging, etc.

[0035] Gas Heated Furnace: This type of heating equipment uses fuel gas or other gases as the heat source. Gas heated furnaces can provide high temperature heating and usually have a faster heating rate, which is suitable for samples that require high temperature treatment, such as heat treatment of special alloys or high temperature steels.

[0036] Induction Heating Equipment: Induction heating uses the principle of electromagnetic induction to heat conductive materials. They generate heat by generating a high-frequency electric field around the specimen, so the heating is very rapid and can provide localized heating. This heating method is widely used for materials that require special treatment, such as rapid heating and high-temperature quenching.

[0037] Microwave heating equipment: Microwave heating equipment uses microwave energy to heat samples. Microwaves can generate heat directly inside the material, so they can heat the sample quickly and evenly, and are suitable for heating treatment of certain special materials.

[0038] In this technical solution, the heating module adopts a heating method combining resistance heating and gas heating.

[0039] Cooling equipment for heat treatment of ice-cold specimens usually includes the following types, and the specific choice depends on the size and material of the specimen and the required cooling rate: Water quenching system: Water quenching system is one of the most common cooling equipment, especially suitable for situations where rapid cooling of specimens is required, such as quenching. Water quenching system usually includes a water tank, a water pump and a nozzle, which can quickly reduce the temperature of the specimen by immersing the specimen in cooling water or spraying water onto the surface of the specimen.

[0040] Air cooling system: The air cooling system uses forced convection to accelerate the cooling of the sample. Usually a powerful fan or air duct is used to blow air from the environment around the sample to remove the heat from the sample surface. This method is suitable for larger samples or when gradual cooling is required.

[0041] Salt bath quenching system: Salt bath quenching system uses a heated salt bath as the cooling medium to provide a more uniform and controlled cooling process. The specimen is immersed in a preheated salt bath to achieve rapid cooling, usually for specific metal alloys and precise cooling rate requirements.

[0042] Oil quenching system: The oil quenching system uses hot oil as the cooling medium and is usually used to quench metals more slowly to control the cooling rate of the sample and obtain specific mechanical properties.

[0043] Air Cooling System: Air cooling systems cool the specimen by placing it in a well-ventilated area, using natural convection or assisted fans. This method is suitable for materials and applications that do not require very rapid cooling.

[0044] In this technical solution, the cooling module adopts an air cooling system for cooling.

[0045] Figure 2-Figure 8In the figure, the temperature control system includes a temperature control instrument 10 and an installation component 20. The temperature control instrument 10 is installed in the installation box of the PLC control system through the installation component 20. The temperature control instrument 10 is pulled to drive the limit frame 22 to move in the installation frame 21, and the temperature control instrument 10 is then pulled out of the installation box of the PLC control system.

[0046] The mounting assembly 20 includes a mounting frame 21, a connecting piece 23 and a limiting frame 22. The mounting frame 21 is installed on the surface of the mounting box of the PLC control system. One end of the limiting frame 22 is movably inserted into the mounting frame 21, and the end of the limiting frame 22 is fixedly connected to the connecting piece 23.

[0047] The temperature control instrument 10 is set in the installation box of the PLC control system so that the two share a heat dissipation system to prevent the temperature control instrument 10 from overheating and affecting its own operation. At the same time, the temperature control instrument 10 can be pulled out of the installation box of the PLC control system to facilitate maintenance of the temperature control instrument 10.

[0048] Temperature control instruments 10 play a vital role in heat treatment equipment. They are used to monitor and control the temperature of the sample to ensure that the heat treatment process is carried out according to the set parameters. The following are some common temperature control instruments 10 and their functions: Temperature sensor: Temperature sensor is one of the core components of temperature control system, used to measure the surface or internal temperature of the sample. Common types of temperature sensors include thermocouples and resistance thermometers (such as PT100). They convert temperature into electrical signals for use by the control system.

[0049] Temperature controllers: Temperature controllers adjust the power of the heating device to maintain the set target temperature based on the signal obtained from the temperature sensor. They usually have a PID (proportional-integral-derivative) control algorithm that can adjust the output of the heating device in real time to achieve and maintain the target temperature as quickly and accurately as possible.

[0050] Recorders: Recorders are used to record temperature changes throughout the heat treatment process. They can record time series data of temperature, which is very important for subsequent quality control and process analysis. Recorders are usually able to generate graphs or reports showing the temperature curve and any temperature anomalies.

[0051] Safety equipment: In the temperature control system, safety equipment such as over-temperature protector and emergency stop button are very important. Over-temperature protector can automatically cut off the power supply when the sample exceeds the safe temperature range to prevent equipment damage or sample deterioration. Emergency stop button allows the operator to immediately stop the heating process in an emergency.

[0052] Temperature Indicator: Temperature indicators display the current temperature of the sample, allowing operators to monitor temperature changes during the heating process in real time. They are usually simple and intuitive, providing a number or pointer to display the current temperature value.

[0053] Figure 4-Figure 8 In the figure, the connecting part 23 includes a sleeve frame 231 and two mounting blocks 232. The sleeve frame 231 is fixedly installed on the surface of the temperature control instrument 10. Both ends of the sleeve frame 231 are provided with left and right rotating shafts 233. The surfaces of the left and right rotating shafts 233 are rotatably sleeved with deflection blocks 234. The middle part of the deflection block 234 is fixedly connected with upper and lower limit shafts 235. The upper and lower limit shafts 235 are movably inserted in the corresponding mounting blocks 232. The surface of the mounting block 232 is provided with displacement grooves 236 matching the upper and lower limit shafts 235.

[0054] The surface of the left-right rotating shaft 233 is provided with an anti-skid layer, and the surface of the anti-skid layer of the left-right rotating shaft 233 is rough.

[0055] The surface of the displacement groove 236 is provided with a deformation softening layer, and the surface of the deformation softening layer of the displacement groove 236 is rough.

[0056] When the direction of the temperature control instrument 10 needs to be adjusted, it is adjusted up and down first, pushing the upper or lower side of the temperature control instrument 10, rotating around the upper and lower limit shafts 235 at the corresponding position, and the other upper and lower limit shafts 235 move along the displacement groove 236 to make the temperature control instrument 10 deflect upward or downward. Because the surface of the displacement groove 236 is provided with a deformable soft layer, and the surface of the deformable soft layer of the displacement groove 236 is rough, the upper and lower limit shafts 235 can be fixed by friction at any position of the displacement groove 236, and then the left and right adjustments are made, pushing the left or right side of the temperature controller, and rotating left or right around the left and right rotation shafts 233 as the center. Because the surface of the left and right rotating shafts 233 is provided with an anti-slip layer, and the surface of the anti-slip layer of the left and right rotating shafts 233 is rough, the left and right rotating shafts 233 can be fixed by friction at any position, so as to adjust the temperature control instrument 10. The left and right adjustments can also be performed first, and the left or right side of the temperature controller is pushed, and the left or right side is rotated left or right with the left and right rotating shafts 233 as the center. After the adjustment is completed, the up and down adjustments are performed, and the upper or lower side of the temperature control instrument 10 is pushed, and the upper and lower limit shafts 235 at the corresponding position are rotated as the center. The other upper and lower limit shafts 235 move along the displacement groove 236 to make the temperature control instrument 10 deflect upward or downward.

[0057] The direction of the temperature control instrument 10 can be adjusted by the provided connecting piece 23. The method of adjusting up and down first and then left and right can be adopted, or the method of adjusting left and right first and then up and down can be adopted. After the temperature control instrument 10 is adjusted in any direction, it can be convenient for workers of different heights or different workstations to operate and observe, making the use of the temperature control instrument 10 more convenient.

[0058] Figure 3-Figure 7 In the embodiment, magnetic blocks are disposed inside the mounting block 232 and the mounting frame 21 , and the two magnetic blocks have opposite magnetic properties. The mounting block 232 is fixedly connected to the mounting frame 21 via the magnetic blocks.

[0059] The mounting block 232 is mounted on the mounting frame 21 by mutual adsorption between two magnetic blocks with opposite magnetic properties, so that the connecting member 23 can be quickly installed and disassembled, which is more convenient to use.

[0060] Figure 2-Figure 3 In the embodiment, the temperature control system further includes a sealing sheet 30, which is used to seal the gap between the temperature control instrument 10 and the mounting frame 21. One end of the sealing sheet 30 is sleeved on the surface of the temperature control instrument 10, and the other end of the sealing sheet 30 is fixedly connected to the surface of the mounting frame 21.

[0061] The sealing sheet 30 is made of soft rubber, and the sealing sheet 30 is deformed as the temperature control instrument 10 moves.

[0062] The sealing sheet 30 can be deformed as the temperature control instrument 10 moves, thereby ensuring the sealing of the gap between the temperature control instrument 10 and the mounting frame 21 without affecting the movement of the temperature control instrument 10 .

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A method for modifying an ice-cold sample heat treatment device, characterized in that: The following steps are involved: S1, split control system; An independent temperature control system is set up to be directly connected to the temperature sensing unit, and the temperature control system makes independent adjustments after receiving the temperature information from the temperature sensing unit; S2, generating control parameters; The temperature control system generates temperature control parameters based on the process parameters in the corresponding process recipe and the real-time temperature output by the temperature sensing unit; S3, temperature control; The temperature control system sends the control parameters to the PLC control system in the form of electrical signals. The PLC control system only controls the operation of the heating module and the cooling module through the received electrical signals.

2. The method for modifying an ice-cold sample heat treatment device according to claim 1, characterized in that: The step S1 also includes temperature determination; S1a: The temperature sensing unit obtains the internal temperature T0 of the equipment and compares the T0 value with the preset value T1 of the temperature control system; S1b: During heating, when the internal temperature of the device T0>T1, the temperature control system determines that the internal temperature of the device meets the requirement and does not perform corresponding operations. When the internal temperature of the device T0≤T1, the temperature control system determines that the requirement is not met and enters step S2; Or S1b: During cooling, when the internal temperature of the equipment is T0≤T1, the temperature control system determines that the internal temperature of the equipment has reached the requirement and does not perform corresponding operations. When the internal temperature of the equipment is T0>T1, the temperature control system determines that the requirement has not been met and enters step S2.

3. The method for modifying an ice-cold sample heat treatment device according to claim 1, characterized in that: The S3 step also includes heating regulation and cooling regulation. When performing heating regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by controlling the resistance heating temperature and the number of gas supply ports. When performing cooling regulation, the PLC control system adjusts the temperature inside the heat treatment equipment by the cooling compression ratio, the number of compressor operations and the fan speed.

4. The method for modifying an ice-cold sample heat treatment device according to claim 1, characterized in that: The temperature control system comprises a temperature control instrument (10) and a mounting assembly (20); the temperature control instrument (10) is installed in an installation box of a PLC control system via the mounting assembly (20); the temperature control instrument (10) is pulled to drive a limit frame (22) to move in the installation frame (21), and the temperature control instrument (10) is then pulled out of the installation box of the PLC control system.

5. The method for modifying an ice-cold sample heat treatment device according to claim 4, characterized in that: The mounting assembly (20) comprises a mounting frame (21), a connecting piece (23) and a limiting frame (22); the mounting frame (21) is mounted on the surface of a mounting box of a PLC control system; one end of the limiting frame (22) is movably inserted into the mounting frame (21), and an end of the limiting frame (22) is fixedly connected to the connecting piece (23).

6. The method for modifying an ice-cold sample heat treatment device according to claim 5, characterized in that: The connecting member (23) comprises a sleeve frame (231) and two mounting blocks (232); the sleeve frame (231) is fixedly mounted on the surface of the temperature control instrument (10); left and right rotating shafts (233) are provided at both ends of the sleeve frame (231); deflection blocks (234) are rotatably sleeved on the surfaces of the left and right rotating shafts (233); upper and lower limit shafts (235) are fixedly connected to the middle of the deflection block (234); the upper and lower limit shafts (235) are movably inserted into corresponding mounting blocks (232); and displacement grooves (236) matching the upper and lower limit shafts (235) are provided on the surface of the mounting block (232).

7. The method for modifying an ice-cold sample heat treatment device according to claim 6, characterized in that: Magnetic blocks are disposed inside the mounting block (232) and the mounting frame (21), the two magnetic blocks have opposite magnetic properties, and the mounting block (232) is fixedly connected to the mounting frame (21) via the magnetic blocks.

8. The method for modifying an ice-cold sample heat treatment device according to claim 6, characterized in that: The surface of the left and right rotating shafts (233) is provided with an anti-slip layer, and the surface of the anti-slip layer of the left and right rotating shafts (233) is rough.

9. The method for modifying an ice-cold sample heat treatment device according to claim 6, characterized in that: A deformable soft layer is provided on the surface of the displacement groove (236), and the surface of the deformable soft layer of the displacement groove (236) is rough.

10. The method for modifying an ice-cold sample heat treatment device according to claim 4, characterized in that: The temperature control system further comprises a sealing sheet (30), the sealing sheet (30) being used to seal the gap between the temperature control instrument (10) and the mounting frame (21), one end of the sealing sheet (30) being sleeved on the surface of the temperature control instrument (10), and the other end of the sealing sheet (30) being fixedly connected to the surface of the mounting frame (21).

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