A high-temperature thermal shock experiment system and experiment method

Abstract

The application discloses a high-temperature thermal shock experiment system, which comprises a rack, a control box arranged at the bottom of the rack, a heating furnace fixed to the upper portion of the rack, a furnace chamber of the heating furnace, a heating element arranged in the furnace chamber, a furnace chamber opening of the heating furnace communicating with the furnace chamber, a furnace door assembly arranged directly below the heating furnace and used for carrying materials and being liftable to block the furnace chamber opening, a furnace door lifting mechanism used for controlling the lifting of the furnace door assembly, and a water cooling system comprising a furnace mouth water cooling plate arranged at the bottom of the heating furnace and surrounding the furnace chamber opening. The application has novel design and simple structure. The gradient heat preservation design guarantees the high-temperature constant temperature effect of the furnace chamber, the water cooling mechanism is used to avoid the heat radiation to the periphery, the stable butt joint of the furnace door is guaranteed, and the automatic material thermal shock experiment can be realized by cooperating with the automatic feeding and discharging equipment.

Description

Technical Field

[0001] This invention relates to the field of materials testing equipment technology, and in particular to a high-temperature thermal shock testing system and method. Background Technology

[0002] Thermal shock testing is an important method for verifying the physical stability and resistance to damage of materials under rapid heating and cooling conditions. It typically involves heating the material to an extremely high temperature and then rapidly exposing it to a low-temperature environment for quick cooling. This extreme temperature cycling is crucial for evaluating the crack resistance and service life of new materials such as special ceramics, refractories, and high-temperature alloys, and is an indispensable part of the research and development and production of high-temperature materials.

[0003] Current high-temperature heating equipment requires frequent opening and closing of the furnace door under ultra-high temperature conditions. The structural components at the furnace door are prone to deformation after rapid heating and cooling, leading to problems such as furnace cracking and poor sealing. At the same time, the huge heat radiation generated by the high-temperature opening will directly scorch the furnace opening and the mechanical transmission components below, causing thermal expansion and deformation or lubrication failure, making it difficult to meet the requirements of high-frequency, fully automated safety testing. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art where structural components at the furnace door are prone to deformation after long-term use, leading to easy cracking of the furnace chamber, poor sealing, and the high temperature at the furnace opening during thermal shock experiments affecting the service life of surrounding components, thus failing to meet the needs of automated experiments. Therefore, this invention proposes a high-temperature thermal shock experimental system and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-temperature thermal shock experimental system, comprising:

[0007] The rack and the control box located at its bottom;

[0008] A heating furnace is fixed to the upper part of the frame. The heating furnace has a furnace chamber, a heating element is provided in the furnace chamber, and the bottom of the heating furnace has a furnace chamber opening that communicates with the furnace chamber.

[0009] A furnace door assembly is located directly below the heating furnace, used to support materials and can be raised and lowered to seal the furnace opening;

[0010] Furnace door lifting mechanism, used to control the lifting and lowering of furnace door components;

[0011] The water cooling system includes a furnace mouth water cooling plate disposed at the bottom of the heating furnace and surrounding the furnace opening, a tray water cooling base plate disposed at the bottom of the furnace door assembly, and a central beam water cooling plate disposed transversely in the middle of the frame and located between the heating furnace and the control box.

[0012] Preferably, the furnace body structure of the heating furnace is provided from the inside out as follows: an anti-corrosion lining, a main refractory layer covering the anti-corrosion lining, and a main insulation layer covering the main refractory layer.

[0013] More preferably, the furnace door assembly is provided from top to bottom as follows: a material loading platform for placing materials, a refractory layer for the lower furnace door, and a water-cooled floor for the tray;

[0014] When the furnace door assembly rises to the closed position, the refractory layer of the lower furnace door abuts and adheres to the anti-corrosion lining and main refractory layer at the furnace opening.

[0015] Even more preferably, the anti-corrosion liner and the material carrier are made of silicon carbide material.

[0016] More preferably, the main refractory layer and the lower furnace door refractory layer are made of refractory fiberboard; the main insulation layer is made of insulation fiberboard.

[0017] Preferably, the furnace door lifting mechanism includes a ball screw vertically arranged on one side of the frame and a linear guide rail parallel to it, a drive motor for driving the ball screw to rotate, and a screw nut seat threaded with the ball screw. A horizontally arranged cantilever is fixedly installed on the screw nut seat. The cantilever extends horizontally and is fixedly arranged at the lower end of the tray water-cooled base plate. The screw nut seat or the cantilever slides with the linear guide rail.

[0018] Preferably, the water cooling mechanism further includes a lifting area vertically disposed in the middle of the frame and side water cooling plates located on both sides of the furnace door assembly and the furnace door lifting mechanism.

[0019] Preferably, the control box is equipped with electrical control components. The control box is electrically connected to the heating element, the drive motor and the water cooling system respectively, and is used to automatically control the heating furnace temperature rise and fall, the furnace door assembly rise and fall and the water cooling system start and stop synchronously according to a preset program.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, multiple water-cooled plates are set around the high-temperature area to form an all-round water-cooled cooling system. On the one hand, the water-cooled system absorbs and blocks heat radiation to protect the furnace door lifting mechanism and control box and other components. On the other hand, it also improves the cooling efficiency and ensures the rapid cooling and heating effect achieved by thermal shock.

[0022] 2. In this invention, the design of the furnace opening water-cooled plate, the tray water-cooled bottom plate and the side water-cooled plate effectively protects the flange and ball screw at the furnace opening to maintain a suitable temperature, effectively ensuring the stable connection between the furnace door assembly and the furnace opening, and guaranteeing the service life of the equipment.

[0023] 3. In this invention, the design of the inner wall of the silicon carbide furnace and the material loading platform, combined with the gradient heat insulation fiberboard, not only eliminates material contamination but also ensures a high temperature and constant temperature in the furnace, and effectively reduces the temperature of the equipment shell, thus avoiding impact on the surrounding environment of the equipment.

[0024] 4. In this invention, automatic door closing, heating, constant temperature, thermal shock reciprocating operation, and cooling door opening can all be operated without manual intervention. Furthermore, a large operating space is reserved in the middle of the frame, which is suitable for automated equipment such as robotic arms to load and unload materials. It can easily realize automated thermal shock testing and transfer of materials without human intervention, greatly improving safety.

[0025] This invention features a novel design and a simple structure. The gradient insulation design ensures a high-temperature and constant-temperature effect in the furnace chamber, while the water-cooling mechanism prevents heat radiation to the surrounding area and ensures a stable connection of the furnace door. When combined with an automatic loading and unloading device, it can realize a fully automatic material thermal shock experiment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0027] Figure 2 This is a front structural diagram of the present invention.

[0028] Figure 3 For the appendix Figure 2 Sectional view of AA.

[0029] Figure 4 This is a schematic diagram of the furnace inlet water-cooled plate structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the tray water-cooled base plate structure of the present invention.

[0031] Figure 6 This is a schematic diagram of the side water-cooled plate structure of the present invention.

[0032] In the diagram: 1. Frame; 2. Control box; 3. Heating furnace; 31. Furnace chamber; 32. Heating element; 33. Corrosion-resistant lining; 34. Main refractory layer; 35. Main insulation layer; 36. Furnace chamber opening; 4. Furnace door assembly; 41. Material loading platform; 42. Lower furnace door refractory layer; 5. Furnace door lifting mechanism; 5. Cantilever; 51. Screw nut seat; 52. Ball screw; 53. Drive motor; 54. Linear guide rail; 55. Water cooling mechanism; 6. Furnace mouth water cooling plate; 61. Pallet water cooling bottom plate; 62. Middle beam water cooling plate; 63. Side water cooling plate; 64. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Reference Figure 1-6 A high-temperature thermal shock experimental system, comprising:

[0035] The frame 1 and the control box 2 located at its bottom; a protective shell with heat dissipation and ventilation holes can be laid on the outside of the frame 1.

[0036] A heating furnace 3 is fixed to the upper part of the frame 1. The heating furnace 3 is provided with a furnace chamber 31, and a heating element 32 is provided in the furnace chamber 31. The heating element 32 can be a silicon molybdenum rod. The bottom of the heating furnace 3 is provided with a furnace chamber opening 36 that communicates with the furnace chamber 31.

[0037] The furnace door assembly 4 is located directly below the heating furnace 3, and is used to carry materials and can be raised and lowered to seal the furnace opening 36;

[0038] Furnace door lifting mechanism 5 is used to control the lifting and lowering of furnace door assembly 4;

[0039] The water-cooling system 6 includes a furnace mouth water-cooling plate 61 located at the bottom of the heating furnace 3 and surrounding the furnace opening 36, a tray water-cooling base plate 62 located at the bottom of the furnace door assembly 4, and a central beam water-cooling plate 63 horizontally located in the middle of the frame 1 and between the heating furnace 3 and the control box 2. The furnace mouth water-cooling plate 61 protects the flange of the furnace opening 36 from thermal expansion and deformation due to door opening, ensuring the airtightness of the heating furnace 3 after long-term use. The tray water-cooling base plate 62 blocks the heat from the loading platform 41 from being conducted to the cantilever 51 below, ensuring the structural stability of the cantilever 51. The central beam water-cooling plate 63 isolates the high temperature in the middle of the frame 1 from being conducted to the bottom control box 2 after the door is opened, ensuring the stable operation and long-term use of the electrical components in the control box 2.

[0040] In order to meet the requirements of ultra-high temperature and extreme thermal shock tests at 1600℃, the furnace body structure of the heating furnace 3 is provided from the inside to the outside as follows: anti-corrosion lining 33, main refractory layer 34 covering the anti-corrosion lining 33, and main insulation layer 35 covering the main refractory layer 34.

[0041] The furnace door assembly 4 is provided from top to bottom as follows: a material loading platform 41 for placing materials, a lower furnace door refractory layer 42, and a tray water-cooled floor 43. When the furnace door assembly 4 is raised to the closed position, the lower furnace door refractory layer 42 abuts against and adheres to the anti-corrosion lining 33 and the main refractory layer 34 at the furnace opening 36, so as to form a completely sealed high-temperature furnace when the furnace door is closed, ensuring a good heating effect of the furnace 31 and preventing heat radiation from escaping.

[0042] The anti-corrosion lining 33 and the material carrier platform 41 are made of silicon carbide, which has excellent thermal shock resistance and corrosion resistance. It is not prone to peeling or slag shedding under rapid temperature changes, effectively preventing contamination of the experimental materials by the inner wall of the furnace 31. The main refractory layer 34 and the lower furnace door refractory layer 42 are made of 1700 type refractory fiberboard; the main insulation layer 35 is made of 1500 type insulation fiberboard. The gradient insulation layer formed by the main refractory layer 34 and the main insulation layer 35 can ensure long-term high-temperature constant temperature while significantly reducing the temperature of the equipment shell, avoiding the impact of prolonged operation on the surrounding environment.

[0043] In this technical solution, such as Figure 1-6 As shown, the furnace door lifting mechanism 5 includes a ball screw 53 vertically mounted on one side of the frame 1 and a linear guide rail 55 parallel to it, a drive motor 54 driving the ball screw 53 to rotate, and a screw nut seat 52 threadedly engaged with the ball screw 53. A horizontally mounted cantilever 51 is fixedly installed on the screw nut seat 52. The cantilever 51 extends horizontally and is fixedly mounted on the lower end of the tray water-cooled base plate 62. The screw nut seat 52 or the cantilever 51 is slidably engaged with the linear guide rail 55. When it is necessary to control the lifting of the furnace door assembly 4, the drive motor 54 is started to rotate forward or reverse, which, in conjunction with the ball screw mechanism, drives the furnace door assembly 4 to rise to close or fall to open. The sliding engagement between the linear guide rail 55 and the lead screw nut seat 52 or the cantilever 51 greatly ensures the smoothness of the lifting and lowering process of the furnace door assembly 4, ensuring the stability of the material placed on the loading platform 41, and also preventing the furnace door assembly 4 from twisting during lifting and docking, ensuring the stable docking of the furnace door assembly 4 with the furnace opening 36, and also ensuring the good sealing accuracy of the furnace door assembly 4.

[0044] In this technical solution, such as Figure 1-6 As shown, the water-cooling mechanism 6 also includes side water-cooling plates 64 vertically arranged in the lifting area in the middle of the frame 1 and located on both sides of the furnace door assembly 4 and the furnace door lifting mechanism 5. The side water-cooling plates 64 are used to block the heat escaping from the furnace opening 36 and the heat from the furnace door assembly 4 from radiating to the ball screw 53 and linear guide 55 behind when the door is opened at high temperatures. This cools the furnace door lifting mechanism 5, preventing the transmission components from jamming due to thermal expansion or lubrication failure, and ensuring the stable operation of the furnace door lifting mechanism 5.

[0045] In this technical solution, such as Figure 1-3 As shown, the control box 2 integrates electrical control components such as PLC, relay, and frequency converter. The control box is electrically connected to the heating element 32, the drive motor 54, and the water cooling system, respectively, and is used to automatically control the heating furnace 3's temperature rise and fall, the furnace door assembly 4's rise and fall, and the water cooling system's synchronous start and stop according to a preset program, so as to realize fully automated operation.

[0046] This automatic heating system can be widely used in high-temperature sintering and thermal shock experiments of materials. It is also compatible with robots to achieve automatic sample placement and sampling. Its workflow is as follows:

[0047] Step 1: Place the material to be tested on the loading platform 41. The control box 2 controls the drive motor 54 to start, which drives the cantilever 51 and the furnace door assembly 4 to rise steadily along the linear guide rail 55 until the refractory layer 42 of the lower furnace door is tightly fitted with the furnace opening 36, thus completing the material loading and furnace sealing.

[0048] Step 2: Control box 2 controls the heating element 32 to start, raising the furnace 31 to the set temperature and maintaining the temperature for the set time. At this time, the water cooling system 6 is turned on simultaneously, and cooling water is circulated through each water cooling plate.

[0049] Step 3: During the thermal shock test, according to the experimental settings, the control box 2 drives the furnace door assembly 4 to quickly descend and open through the furnace door lifting mechanism 5, and then quickly rise and close again, repeating the process to achieve the thermal shock test of the material by rapid cooling and heating.

[0050] Step 4: After the experiment is completed, the system stops heating. After the furnace chamber 31 cools down to the set temperature, the furnace door assembly 4 descends to the initial position. The experimenter or robotic arm removes the material, thus completing a single experiment cycle.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-temperature thermal shock experimental system, characterized in that, include: The frame (1) and the control box (2) located at its bottom; A heating furnace (3) is fixed to the upper part of the frame (1). The heating furnace (3) is provided with a furnace chamber (31), a heating element (32) is provided in the furnace chamber (31), and a furnace chamber opening (36) communicating with the furnace chamber (31) is provided at the bottom of the heating furnace (3). The furnace door assembly (4) is located directly below the heating furnace (3) and is used to carry materials and can be raised and lowered to seal the furnace opening (36). The furnace door lifting mechanism (5) is used to control the lifting of the furnace door assembly (4); The water cooling system (6) includes a furnace mouth water cooling plate (61) disposed at the bottom of the heating furnace (3) and surrounding the furnace opening (36), a tray water cooling base plate (62) disposed at the bottom of the furnace door assembly (4), and a central beam water cooling plate (6) disposed laterally in the middle of the frame (1) and located between the heating furnace (3) and the control box (2).

2. The high-temperature thermal shock experimental system according to claim 1, characterized in that, The furnace body structure of the heating furnace (3) is provided from the inside to the outside as follows: anti-corrosion lining (33), main refractory layer (34) covering the anti-corrosion lining (33), and main insulation layer (35) covering the main refractory layer (34).

3. The high-temperature thermal shock experimental system according to claim 2, characterized in that, The furnace door assembly (4) is provided from top to bottom as follows: a material loading platform (41) for placing materials, a lower furnace door refractory layer (42) and a tray water-cooled floor (43). When the furnace door assembly (4) rises to the closed position, the refractory layer (42) of the lower furnace door abuts and adheres to the anti-corrosion lining (33) and the main refractory layer (34) at the furnace opening (36).

4. The high-temperature thermal shock experimental system according to claim 3, characterized in that, The anti-corrosion lining (33) and the material carrier (41) are made of silicon carbide material.

5. A high-temperature thermal shock experimental system according to claim 2 or 3, characterized in that, The main refractory layer (34) and the lower furnace door refractory layer (42) are made of (1700) type refractory fiberboard; the main insulation layer (35) is made of (1500) type insulation fiberboard.

6. The high-temperature thermal shock experimental system according to claim 1, characterized in that, The furnace door lifting mechanism (5) includes a ball screw (53) vertically arranged on one side of the frame (1) and a linear guide rail (55) parallel to it, a drive motor (54) for driving the ball screw (53) to rotate and a screw nut seat (52) threaded with the ball screw (53). A horizontally arranged cantilever (51) is fixedly installed on the screw nut seat (52). The cantilever (51) extends horizontally and is fixedly arranged at the lower end of the tray water-cooled bottom plate (62). The screw nut seat (52) or the cantilever (51) slides with the linear guide rail (55).

7. The high-temperature thermal shock experimental system according to claim 1, characterized in that, The water cooling mechanism (6) also includes a lifting area vertically arranged in the middle of the frame (1) and side water cooling plates (64) located on both sides of the furnace door assembly (4) and the furnace door lifting mechanism (5).

8. The high-temperature thermal shock experimental system according to claim 1, characterized in that, The control box (2) is equipped with electrical control components. The control box is electrically connected to the heating element (32), the drive motor (54) and the water cooling system respectively. It is used to automatically control the heating furnace (3) temperature rise and fall, the furnace door assembly (4) rise and fall and the water cooling system start and stop according to the preset program.

9. An experimental method based on the high-temperature thermal shock experimental system according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Place the material to be tested on the furnace door assembly (4) and control the furnace door lifting mechanism (5) to drive the furnace door assembly (4) to rise to the closed position to close the furnace chamber (31). S2. Start the heating program to raise the temperature of the furnace (31) to the preset temperature, and simultaneously turn on the water cooling system (6) for continuous circulating water cooling; S3. After the constant temperature preset time, control the furnace door lifting mechanism (5) to drive the furnace door assembly (4) to move up and down repeatedly, so that the material is alternately in the high temperature zone inside the furnace and the external cooling zone to carry out thermal shock test; S4. After the experimental cycle is completed, stop heating and cool down to a suitable temperature. Then, the furnace door assembly (4) can be lowered to remove the material and complete the thermal shock experiment.

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