Thermal shock furnace with protective cover

Abstract

The utility model relates to the technical field of thermal shock resistance test, specifically disclose a thermal shock furnace with protective cover, the structure includes furnace body, workstation, first furnace door with test platform, vertically lift's second furnace door and detachable protective cover, the protective cover is located workstation top, covers first furnace door moving range, its top opening, one side is equipped with fan, the other side is hinged with the turnover door, and the fan is connected with the temperature sensor located in the test platform, temperature sensor is connected with the temperature control module outside. The protective cover isolates the high temperature area, and air circulation is realized with the fan and the ventilation hole, so that the sample cooling is uniform, the local cracking interference is reduced, and it is suitable for irregular workpiece test; the temperature sensor and temperature control module linkage, automatically start and stop the fan to adjust the cooling rate, improve the experimental efficiency and reliability.

Description

Technical Field

[0001] This utility model relates to the field of thermal shock resistance testing technology, specifically a thermal shock furnace with a protective cover. Background Technology

[0002] In materials science and engineering, thermal shock resistance is an important indicator for evaluating the stability of materials under high-temperature environments. Traditional thermal shock testing equipment typically suffers from problems such as complex operation, insufficient safety, and high energy consumption.

[0003] In existing equipment, sample cooling relies on manual operation. The testing process requires manually moving the heated workpiece to a pre-set cooling water tank for cooling, which is not only inefficient but also poses safety hazards to operators due to high-temperature exposure. Furthermore, manual operation affects the testing cycle and the accuracy of the results to some extent. Traditional water cooling often uses an "immersion" method, which can lead to insufficient contact between the test workpiece and the water (e.g., on surfaces with protrusions or gaps), resulting in uneven cooling, localized thermal stress concentration in the material, and potentially mechanical cracking that is not due to thermal shock, interfering with the authenticity of the experimental results. At the same time, traditional equipment has low functional integration, often requiring additional auxiliary devices for temperature control or protection functions, further increasing operating costs and maintenance complexity.

[0004] Therefore, there is an urgent need for a new type of thermal shock furnace that can solve the above problems in order to meet the needs of modern laboratories and industrial production for efficient and safe thermal shock performance testing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a thermal shock furnace with a protective cover. By setting up a protective cover and a flip-up door, the high-temperature area is isolated to prevent operators from being burned. It is equipped with a fan, ventilation holes and convection ducts to replace immersion cooling, achieve uniform cooling and reduce local cracking. At the same time, it is also equipped with a temperature sensor and a temperature control module to automatically adjust the cooling rate and improve the accuracy and efficiency of testing. This invention solves the problems of low efficiency and insufficient safety of traditional thermal shock furnaces.

[0006] The objective of this utility model is achieved through the following technical solution: A thermal shock furnace with a protective cover includes a furnace body with a furnace opening on its side. An electric heating element is installed on the inner wall of the furnace body. A workbench is located below the furnace opening on one side of the furnace body. A first furnace door is horizontally slidably connected to the top of the workbench. A test platform is connected to the first furnace door on the side opposite to the furnace opening. A vertically lifting second furnace door is connected to the side of the furnace body on the side opposite to the furnace opening. A protective cover with a top opening is detachably connected to the top of the workbench. The horizontal projection range of the protective cover completely covers the sliding path of the first furnace door. A fan is installed on the protective cover on one side of the test platform, and a hinged flip door is connected to the protective cover on the other side of the test platform.

[0007] Furthermore, the protective cover has multiple evenly distributed ventilation holes on the side opposite to the furnace opening.

[0008] Furthermore, the bottom of the protective cover is provided with a plurality of evenly distributed positioning pins, the top of the workbench is provided with positioning holes corresponding to the position and size of the positioning pins, the lower side of the protective cover is provided with a plurality of evenly distributed ear plates, the ear plates are provided with through holes, when the protective cover is installed on the workbench, the ear plates are in a vertical state, and the side of the workbench is provided with threaded holes corresponding to the position and size of the through holes of the ear plates at this time.

[0009] Furthermore, the protective cover is made of 304 stainless steel or 310S stainless steel.

[0010] Furthermore, the inner wall of the protective cover is provided with a heat insulation layer, which is made of cordierite-mullite multiphase ceramic.

[0011] Furthermore, the flip door is equipped with a high-temperature resistant latch, which enables the flip door to be tightly closed with the protective cover.

[0012] Furthermore, the fan is an AxiEco300 axial flow fan with an air volume of 2400 m³ / h, and the fan is connected to an external temperature control module.

[0013] Furthermore, a temperature sensor is installed at the top edge of the test platform. The temperature sensor is a K-type armored thermocouple, model WRNK-191, which is connected to an external temperature control module.

[0014] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: (1) The thermal shock furnace isolates the high-temperature area by setting up a protective cover. With the design of the fan facing the test platform, the air can circulate in the protective cover. The evenly distributed ventilation holes make the cooling rate of the sample surface more consistent and the thermal stress distribution more uniform. This can reduce the interference of local abnormal cracks on the results, and is especially suitable for testing workpieces with irregular shapes.

[0015] (2) The temperature sensor is linked with the external temperature control module to control the fan automatically to start and stop according to the internal temperature. The cooling rate of the test sample can be adjusted according to the test requirements. The overall operating efficiency is high, which solves the shortcomings of traditional thermal shock furnace in controlling cooling rate, efficiency and energy consumption, and improves experimental efficiency and reliability. Attached Figure Description

[0016] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a thermal shock furnace; Figure 2 This is a schematic diagram of the thermal shock furnace with a protective cover according to this utility model (the ear plate is not shown in the figure). Figure 3 This utility model Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the drive mechanism of this utility model; Figure 5 This is a schematic diagram of the structure of the protective cover of this utility model.

[0019] Wherein: 1 is furnace body; 2 is workbench; 3 is first furnace door; 4 is second furnace door; 5 is protective cover; 6 is temperature sensor; 7 is fan; 8 is tilting door; 9 is oil cylinder; 11 is furnace opening; 12 is electric heating tube; 13 is slide rail frame; 21 is slide rail; 22 is drive mechanism; 31 is test platform; 51 is ventilation hole; 52 is positioning pin; 53 is ear plate; 91 is protective shell; 92 is rope; 131 is limit plate; 132 is groove; 133 is center guide wheel; 134 is side guide wheel; 221 is drive motor; 222 is drive sprocket; 223 is transmission chain; 224 is connecting seat; 225 is driven sprocket. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses consistent with some aspects of this invention as detailed in the appended claims.

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] See Figures 1-5 This utility model provides a thermal shock furnace with a protective cover, including a furnace body 1. A furnace opening 11 is provided on the side of the furnace body 1. Multiple evenly distributed electric heating tubes 12 are arranged on the inner wall of the furnace body 1. A workbench 2 is arranged below the furnace opening 11 on one side of the furnace body 1. Two slide rails 21 are arranged on the top of the workbench 2, both facing the furnace opening 11. A drive mechanism 22 is arranged on the top of the workbench 2 between the two slide rails 21. The top of the drive mechanism 22 slides horizontally with the bottom of a first furnace door 3. The furnace body 1 is connected to a test platform 31 on the side of the first furnace door 3 facing the furnace opening 11. A vertical slide rail frame 13 is provided on the side of the furnace body 1, on the side of the furnace opening 11. A vertically moving second furnace door 4 is slidably connected within the slide rail frame 13. Limiting plates 131 are fixedly installed on both sides of the slide rail frame 13. Limiting grooves are provided on both sides of the second furnace door 4. One side of the limiting plate 131 is inserted into the limiting groove 31 to limit the vertical movement of the second furnace door 4 and prevent the second furnace door 4 from being misaligned during vertical sliding. A hydraulic cylinder 9 is connected to the side of the furnace body 1, near the slide rail frame 13. A protective shell 91 is connected to the side of the hydraulic cylinder 9. A rope 92 is fixedly connected to the output end of the top of the hydraulic cylinder 9. The rope 92 is slidably connected to the top of the second furnace door 4.

[0023] like Figure 3 As shown, in one embodiment, a groove 132 is provided on the top of the slide rail frame 13 near the oil cylinder 9. A central guide wheel 133 is provided in the groove 132 near the center of the top of the slide rail frame 13. A side guide wheel 134 is provided in the groove 132 near the oil cylinder 9. The rope 92 passes through the side guide wheel 134 and the central guide wheel 133 in sequence and is fixedly connected to the top of the second furnace door 4.

[0024] like Figure 4As shown, in one embodiment, the drive mechanism 22 includes a drive motor 221. The outer peripheral surface of the drive motor 221 is connected to the inner peripheral surface of a drive sprocket 222. The outer peripheral surface of the drive sprocket 222 is connected to the outer peripheral surface of a driven sprocket 225 via a transmission chain 223. A connecting seat 224 is fixedly connected to the transmission chain 223, and the connecting seat 224 is fixedly connected to the bottom of the first furnace door 3. During operation, the drive motor 221 drives the drive sprocket 222 to rotate, and the drive sprocket 222 drives the driven sprocket 225 to rotate via the transmission chain 223. The transmission chain 223 then drives the connecting seat 224 to move horizontally relative to the first furnace door 3. This is prior art and will not be described in detail here.

[0025] like Figure 2 As shown, the top of the workbench 2 is detachably connected to a protective cover 5 with a top opening via a positioning pin 52 and an ear plate 53. The horizontal projection range of the protective cover 5 completely covers the sliding path of the first furnace door 3, and the top opening is used to balance the air pressure inside and outside the protective cover. This protective cover 5 isolates and protects the experiment to avoid accidents. A fan 7 for controlling the cooling of the workpiece is installed on the protective cover 5 on one side of the test platform 31, and the air outlet of the fan 7 faces one side of the test platform 31. A flip door 8 is hinged to the protective cover 5 on the other side of the test platform 31, and a temperature sensor 6 is set on the top edge of the test platform 31.

[0026] like Figure 5 As shown, the protective cover 5 has multiple evenly distributed ventilation holes 51 to further increase heat dissipation efficiency. The bottom edge of the protective cover 5 is provided with multiple evenly distributed positioning pins 52. The positioning pins 52 are made of 45 steel, with a length of 12~15mm, and are welded vertically to the bottom of the protective cover 5. The top of the workbench 2 is provided with positioning holes corresponding to the position and size of the positioning pins 52. The lower side of the protective cover 5 is welded with multiple evenly distributed ear plates 53. The ear plates 53 are steel plates with a thickness of 5~8mm and are provided with through holes. When the protective cover 5 is installed on the workbench 2, the ear plates 53 are in a vertical state. The side of the workbench 2 is provided with threaded holes corresponding to the position and size of the through holes of the ear plates 53 at this time.

[0027] During installation, align the positioning pin 52 at the bottom of the protective cover 5 with the positioning hole of the workbench 2, and slowly lower the protective cover 5 so that the positioning pin is fully inserted into the positioning hole (the fit clearance between the positioning pin and the positioning hole is 0.1-0.3mm to ensure that the protective cover does not wobble after installation). At this time, the top opening of the protective cover 5 is exactly aligned with the sliding path of the first furnace door 3, and the through hole of the ear plate 53 is aligned with the threaded hole on the side of the workbench 2. Then, use an M8×30 ​​stainless steel bolt to pass through the through hole of the ear plate 53 and screw it into the threaded hole of the workbench 1. The bolt tightening torque is controlled at 15~20N / m.

[0028] Furthermore, the protective cover 5 is normally made of 304 stainless steel. However, if the equipment is used for high-temperature thermal shock testing above 1000℃, the protective cover 5 can be made of 310S stainless steel, which has a long-term operating temperature ≥1000℃ and can resist high-temperature radiation and oxidation corrosion. The welds of the protective cover 5 are welded with stainless steel welding wire (such as ER308L, which is compatible with 304 stainless steel). After welding, it needs to be ground to avoid sharp edges scratching operators or interfering with the sliding of the horizontal moving door panel. The inner wall of the protective cover 5 is provided with a heat insulation layer, which is made of cordierite-mullite multiphase ceramic. In this utility model, the mass ratio of cordierite to mullite is 30%~40%:60%~70%.

[0029] like Figure 2 As shown, the flip door 8 is equipped with a high-temperature resistant latch (made of 304 stainless steel or 310S stainless steel). The flip door 8 is closed with the protective cover 5 through the high-temperature resistant latch. The latch tongue of the high-temperature resistant latch is installed on the flip door 8, and the latch is installed on the protective cover 5. The high-temperature resistant latch secures the flip door 8 after it is closed, preventing the flip door 8 from being accidentally opened due to the air flow driven by the fan 7.

[0030] Furthermore, the fan 7 is an AxiEco300 axial flow fan. Its installation dimensions are 300mm × 300mm × 75mm, with an airflow of 2400m³ / h (free air supply). This airflow covers the test platform and, together with the ventilation holes 51, forms efficient convection, meeting the requirements for controlling the workpiece cooling rate. The static pressure of 150Pa is greater than the resistance of the ventilation holes in the protective cover, preventing high temperatures from stagnating inside the protective cover 5. The fan 7 is connected to an external temperature control module to control its start and stop. The temperature control module is model RKC CH102 and is located in an external PLC control cabinet. A temperature sensor 6, a K-type armored thermocouple model WRNK-191, is installed at the top edge of the test platform 31. This K-type armored thermocouple is connected to the RKC CH102 temperature control module, transmitting the detected temperature signal to the module.

[0031] Furthermore, the electrical equipment inside the device is connected to an external PLC control cabinet. In this embodiment, the PLC control cabinet is connected to the drive mechanism 22, the electric heating tube 12, the oil cylinder 9, and the temperature control module.

[0032] When the equipment is running, first open the flip door 8 and place the workpiece to be tested on the test platform 31, which is composed of insulation cotton, ensuring that the workpiece is stable and correctly positioned. Then start the equipment, and the hydraulic cylinder 9 begins to depressurize. The hydraulic rod of the working cylinder begins to move downward, and the second furnace door 4, which moves vertically, slides upward through the traction of the rope 92 on the hydraulic rod, thereby opening the furnace opening 11. At the same time, the PLC control cabinet controls the drive mechanism 22 to start, so that the first furnace door 3 slides horizontally along the slide rail 21, sending the test platform 31 with the test workpiece into the furnace opening 11. When the horizontally moving first furnace door 3 is complete... After the furnace opening 11 is fully enclosed, the electric heating element 12 is energized and heated via the PLC control cabinet to perform high-temperature treatment on the workpiece. After heating is completed, the PLC control cabinet controls the drive mechanism 22 to reverse, causing the first furnace door 3 to move the test platform 31 out of the furnace opening 11. Simultaneously, the hydraulic cylinder 9 begins to pressurize, and the hydraulic rod connecting cable 92 begins to lower, causing the vertically moving second furnace door 4 to descend and re-close the entrance of the furnace opening 11. During this process, the WRNK-191K armored thermocouple located at the top edge of the test platform 31 monitors the test temperature in real time and transmits the temperature signal to the RKC. The CH102 temperature control module is easily controlled by the PLC control cabinet. After the test platform 31 is moved out, the temperature control module automatically starts the fan 7 according to the program set by the PLC and the received temperature signal to adjust the cooling rate of the workpiece, ensuring the safety and efficiency of the test. After the workpiece temperature drops to a safe range, the temperature control module automatically shuts off the fan 7, and the PLC controls the second furnace door 4 to open, starting the cyclic test. The number of cycles is set by the program until the sample breaks. The critical thermal shock number is recorded to evaluate the material properties. Finally, the operator can unlock the flip door 8 to take out the tested workpiece.

[0033] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0034] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A thermal shock furnace with a protective cover, comprising a furnace body (1), wherein a furnace opening (11) is provided on the side of the furnace body (1), an electric heating tube (12) is provided on the inner wall of the furnace body (1), a workbench (2) is provided on the furnace body (1) below the side of the furnace opening (11), a first furnace door (3) is horizontally slidably connected to the top of the workbench (2), and a test platform (31) is connected to the first furnace door (3) on the side opposite to the furnace opening (11); a vertically lifting second furnace door (4) is connected to the side of the furnace body (1) on the side of the furnace opening (11), characterized in that, The top of the workbench (2) is detachably connected to a protective cover (5) with a top opening. The horizontal projection range of the protective cover (5) completely covers the sliding path of the first furnace door (3). A fan (7) is installed on the protective cover (5) on one side of the test platform (31), and a flip door (8) is hinged on the protective cover (5) on the other side of the test platform (31).

2. The thermal shock furnace according to claim 1, characterized in that, The protective cover (5) has multiple evenly distributed ventilation holes (51) on the side opposite to the furnace opening (11).

3. The thermal shock furnace according to claim 1, characterized in that, The bottom of the protective cover (5) is provided with a plurality of evenly distributed positioning pins (52). The top of the workbench (2) is provided with positioning holes corresponding to the position and size of the positioning pins (52). The lower side of the protective cover (5) is provided with a plurality of evenly distributed ear plates (53). The ear plates (53) are provided with through holes. When the protective cover (5) is installed on the workbench (2), the ear plates (53) are in a vertical state. The side of the workbench (2) is provided with threaded holes corresponding to the position and size of the through holes of the ear plates (53) at this time.

4. The thermal shock furnace according to claim 1, characterized in that, The protective cover (5) is made of 304 stainless steel or 310S stainless steel.

5. The thermal shock furnace according to claim 1, characterized in that, The inner wall of the protective cover (5) is provided with a heat insulation layer, which is made of cordierite-mullite multiphase ceramic.

6. The thermal shock furnace according to claim 1, characterized in that, The flip door (8) is equipped with a high-temperature resistant latch lock, and the flip door (8) is closed with the protective cover (5) through the high-temperature resistant latch lock.

7. The thermal shock furnace according to claim 1, characterized in that, The fan (7) is an AxiEco300 axial flow fan with an air volume of 2400 m³ / h. The fan (7) is connected to an external temperature control module.

8. The thermal shock furnace according to claim 7, characterized in that, A temperature sensor (6) is provided at the top edge of the test platform (31). The temperature sensor (6) is a K-type armored thermocouple with the model number WRNK-191. The K-type armored thermocouple is connected to an external temperature control module.

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