Ultrahigh temperature creep-fatigue two-stage high temperature atmospheric furnace

Abstract

The utility model relates to high temperature atmosphere furnace field discloses a kind of ultrahigh temperature creep fatigue double-section high temperature atmosphere furnace, including shell, the quantity of shell is two, two The shell is set left and right, and two shells are fixedly connected by tension handle, the top of shell is fixedly connected with outer cover by screw, the bottom of shell is fixedly connected with cover plate by screw, and the shell on right side is fixedly connected with thermocouple fixing frame by screw.In the utility model, the double-section furnace body configuration and the independent temperature control system are used, the silicon-carbon rod body and the thermocouple for accurate temperature measurement are matched, the temperature uniformity in the hearth is improved by more than 50%, the temperature gradient can be flexibly regulated, and the problem of poor temperature uniformity of traditional single-section heating furnace is completely solved.The low-temperature cold end is naturally formed by the double-section structure, stable clamping can be realized without relying on external water cooling system, and the accuracy and reliability of test data are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature atmospheric furnaces, and in particular to a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue. Background Technology

[0002] The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace is a key testing equipment for the research and development of new materials in high-end equipment fields such as aviation, aerospace, and nuclear energy. Its core function is to provide materials with a precise and controllable ultra-high temperature environment, simulate the mechanical behavior of materials under extreme working conditions, provide reliable data support for the evaluation of material creep and fatigue performance, and directly affect the safety and service life of high-end equipment.

[0003] In existing technologies, high-temperature fatigue tests mostly rely on single-stage heating atmospheric furnaces. The heating chamber is formed by the insulating bricks on the inner wall of the furnace, and electric heating wires are embedded for heating. Multiple thermocouples are used to collect temperature data. Adjustment components are used to reduce the gap between the furnace body and the specimen to improve insulation. An external water cooling system is then used to clamp the cold end of the specimen to complete the high-temperature mechanical property test.

[0004] However, existing single-stage heating atmospheric furnaces have significant defects in temperature uniformity, with large differences in longitudinal temperature gradients within the furnace chamber, making it difficult to form a stable and consistent ultra-high temperature testing environment. This results in large deviations in material test data, failing to accurately reflect the actual performance of the materials in use. Furthermore, traditional atmospheric furnaces rely on complex water-cooling systems, further limiting their compatibility with standard testing machines. Therefore, a dual-stage ultra-high temperature creep fatigue atmospheric furnace is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an ultra-high temperature creep fatigue dual-stage high temperature atmospheric furnace, which aims to solve the problem of poor temperature uniformity in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue, comprising a shell, wherein there are two shells arranged side by side, and the two shells are fixedly connected by a tension handle, an outer cover is fixedly connected to the top of the shell by screws, and a cover plate is fixedly connected to the bottom of the shell by screws; A thermocouple holder is fixedly connected to the housing on the right side by screws. A double-hole ceramic tube is fixedly connected to the back of the housing, and a thermocouple is installed inside the double-hole ceramic tube. The thermocouple passes through the double-hole ceramic tube and extends into the interior of the housing. A thermocouple clip is provided on the back of the housing, and a first baffle is provided inside the housing. The thermocouple is fixedly connected to the interior of the housing on the right side by the thermocouple clip and the first baffle.

[0007] As a further description of the above technical solution: a second baffle is provided inside the shell, and a heat preservation device is fixedly connected inside the shell through the second baffle.

[0008] As a further description of the above technical solution: an observation window is fixedly installed on the side of the housing by screws.

[0009] As a further description of the above technical solution: the inner wall of the housing is fixedly connected to a rod clamp fixing plate by screws, the rod clamp fixing plate is fixedly connected to a silicon carbide rod clamp by screws, a silicon carbide rod is provided inside the housing, the outer wall of the silicon carbide rod is fitted with an insulating sleeve, and the silicon carbide rod is fixedly connected to the silicon carbide rod clamp through the insulating sleeve.

[0010] As a further description of the above technical solution: the heat preservation device is provided with a ceramic sleeve, and the ceramic sleeve penetrates the heat preservation device, and the silicon carbide rod penetrates the inner wall of the ceramic sleeve.

[0011] As a further description of the above technical solution: the front of the housing is threaded with a bakelite handle, and the back of the housing is provided with an aviation plug socket.

[0012] This utility model has the following beneficial effects: 1. This utility model employs a dual-section furnace body configuration and an independent temperature control system, combined with silicon carbide rods and precise temperature-measuring thermocouples, which improves the temperature uniformity within the furnace chamber by more than 50%. It allows for flexible adjustment of the temperature gradient, completely solving the problem of poor temperature uniformity in traditional single-section heating furnaces. The dual-section structure naturally forms a low-temperature cold end, achieving stable clamping without relying on an external water-cooling system, significantly improving the accuracy and reliability of experimental data.

[0013] 2. This utility model, through its compact modular design and convenient operation structure with bakelite handles and tensioning handles, significantly reduces the size of the equipment and makes it compatible with various standard fatigue testing machines. The synergistic design of the insulation device and ceramic sleeve reduces heat loss, the insulating sleeve ensures heating safety, and the observation window facilitates test monitoring. Overall, the testing device is simplified, reducing operating energy consumption and maintenance costs, and improving the applicability and ease of use of the equipment. Attached Figure Description

[0014] Figure 1 This is a front view of a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue proposed in this utility model; Figure 2 This is a side view of a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue proposed in this utility model; Figure 3 This is a side sectional view of a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue proposed in this utility model. Figure 4This is a partial sectional view of the top of a dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue proposed in this utility model.

[0015] Legend: 1. Sample; 2. Outer cover; 3. Shell; 4. Cover plate; 5. Observation window; 6. First baffle; 7. Thermocouple holder; 8. Insulation device; 9. Silicon carbide rod; 10. Bakelite handle; 11. Second baffle; 12. Aviation connector; 13. Porcelain sleeve; 14. Tightening handle; 15. Silicon carbide rod clamp; 16. Insulating sleeve; 17. Double-hole ceramic tube; 18. Thermocouple clamp; 19. Rod clamp fixing plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figure 1 This utility model provides an embodiment of an ultra-high temperature creep fatigue dual-stage high temperature atmospheric furnace, including a shell 3. There are two shells 3, which are arranged side by side and are fixedly connected by a tension handle 14. The two shells 3 arranged side by side form a cuboid furnace body. The top of the shell 3 is fixedly connected to an outer cover 2 by screws, and the bottom of the shell 3 is fixedly connected to a cover plate 4 by screws. The front of the shell 3 is threaded with a bakelite handle 10 for easy opening, closing and clamping of the furnace. The back of the shell 3 is provided with an aviation plug socket 12 for energizing and heating the silicon carbide rod 9.

[0018] Reference Figure 2 - Figure 4A thermocouple mounting bracket 7 is fixedly connected to the right-side housing 3 by screws. A double-hole ceramic tube 17 is fixedly connected to the back of the housing 3, and a thermocouple is installed inside the double-hole ceramic tube 17. The thermocouple passes through the double-hole ceramic tube 17 and extends into the interior of the housing 3. A thermocouple clip 18 is provided on the back of the housing 3. A first baffle 6 is provided inside the housing 3. The thermocouple is fixedly connected to the inside of the right-side housing 3 through the thermocouple clip 18 and the first baffle 6. A second baffle 11 is provided inside the housing 3. A heat insulation device 8 is fixedly connected to the inside of the housing 3 through the second baffle 11. The side of the housing 3 is fixed with an observation window 5 by screws, which facilitates observation of the state of the sample 1 during the heating process and the addition of measuring tools such as video extensometers. The inner wall of the housing 3 is fixed with a rod clamp fixing plate 19 by screws. The rod clamp fixing plate 19 is fixed with a silicon carbide rod clamp 15 by screws. A silicon carbide rod 9 is provided inside the housing 3. An insulating sleeve 16 is fitted on the outer wall of the silicon carbide rod 9, and the silicon carbide rod 9 is fixedly connected to the silicon carbide rod clamp 15 through the insulating sleeve 16. A ceramic sleeve 13 is provided on the heat preservation device 8, and the ceramic sleeve 13 penetrates the heat preservation device 8. The silicon carbide rod 9 penetrates the inner wall of the ceramic sleeve 13.

[0019] Working principle: In use, first open the left and right shells 3 using the bakelite handle 10, place the test sample 1 in the center of the furnace body, and then tighten the two shells 3 using the pull handle 14 to ensure good furnace sealing. Then connect the power supply to the aviation plug socket 12. The silicon carbide rod 9 is fixed to the rod clamp fixing plate 19 through the silicon carbide rod clamp 15. Heating is started under the insulation protection of the insulating sleeve 16. The heat is transferred to the furnace chamber through the ceramic sleeve 13 on the heat preservation device 8, forming an ultra-high temperature environment. The dual-section furnace body structure achieves precise temperature control through independent temperature control logic. The thermocouple passes through... A double-hole ceramic tube 17 extends into the furnace chamber and is fixed to the first baffle 6 via thermocouple clamp 18. It collects real-time temperature data within the furnace chamber and feeds it back to the control system, dynamically adjusting the heating power of the silicon carbide rod 9 to create a uniform and stable temperature field within the furnace chamber. Simultaneously, the temperature gradient can be flexibly adjusted to adapt to different test requirements. The insulation device 8 is fixed via the second baffle 11, effectively reducing heat loss. Combined with the dual-section thermal zoning design, low-temperature "cold ends" are naturally formed at both ends of the furnace body, allowing the fatigue testing machine clamps to directly hold the sample 1 in the cold end region without relying on an external water cooling system. During the test, the state of the sample 1 can be observed in real-time through the observation window 5 on the side of the shell 3. Measurement tools such as a video extensometer can also be added through the observation window 5 to complete the creep fatigue mechanical property test under ultra-high temperature conditions.

[0020] It is worth noting that in this embodiment, the electrical equipment is a common device in the prior art, and the model used can be customized according to actual usage requirements. The power supply interface of the electrical equipment in this utility model is connected to the power supply system through a switch (not shown in the figure) and a wire (not shown in the figure) to realize its control. The circuits and controls involved are all prior art and are known in the current field, so they will not be described in detail here.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-stage high-temperature atmospheric furnace for ultra-high temperature creep fatigue, comprising a shell (3), characterized in that: There are two housings (3), which are arranged on the left and right sides and are fixedly connected by a pull handle (14). The top of the housing (3) is fixedly connected to an outer cover (2) by screws, and the bottom of the housing (3) is fixedly connected to a cover plate (4) by screws. A thermocouple holder (7) is fixedly connected to the housing (3) on the right side by screws. A double-hole ceramic tube (17) is fixedly connected to the back of the housing (3), and a thermocouple is provided inside the double-hole ceramic tube (17). The thermocouple passes through the double-hole ceramic tube (17) and extends into the inside of the housing (3). A thermocouple clip (18) is provided on the back of the housing (3). A first baffle (6) is provided inside the housing (3). The thermocouple is fixedly connected to the inside of the housing (3) on the right side by the thermocouple clip (18) and the first baffle (6).

2. The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace according to claim 1, characterized in that: The shell (3) is provided with a second baffle (11) inside, and a heat preservation device (8) is fixedly connected to the shell (3) through the second baffle (11).

3. The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace according to claim 1, characterized in that: The side of the housing (3) is fixed with an observation window (5) by screws.

4. The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace according to claim 2, characterized in that: The inner wall of the housing (3) is fixedly connected to a rod clamp fixing plate (19) by screws. The rod clamp fixing plate (19) is fixedly connected to a silicon carbide rod clamp (15) by screws. A silicon carbide rod (9) is provided inside the housing (3). An insulating sleeve (16) is provided on the outer wall of the silicon carbide rod (9). The silicon carbide rod (9) is fixedly connected to the silicon carbide rod clamp (15) through the insulating sleeve (16).

5. The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace according to claim 4, characterized in that: The heat preservation device (8) is provided with a ceramic sleeve (13), and the ceramic sleeve (13) penetrates the heat preservation device (8), and the silicon carbide rod (9) penetrates the inner wall of the ceramic sleeve (13).

6. The ultra-high temperature creep fatigue dual-stage high-temperature atmospheric furnace according to claim 1, characterized in that: The front of the housing (3) is threaded with a bakelite handle (10), and the back of the housing (3) is provided with an aviation plug socket (12).

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