A small bell jar furnace testing machine

Abstract

The application provides a small bell furnace testing machine. The machine comprises a furnace body, a furnace cover and a lifting device. The furnace body is internally provided with a furnace cavity, and the lower end of the furnace cavity is provided with a first opening. The top wall inside the furnace body is fixed with a downwardly extending partition plate, which divides the furnace cavity into a first sintering zone and a second sintering zone. The furnace cover comprises a cover body and a sintering plate, and the sintering plate is placed above the cover body. The lifting device is located on the lower side of the furnace body and comprises a liftable workbench. The cover body is placed on the workbench, and the workbench is configured to lift and push the cover body to be buckled on the first opening. The first opening is a circular opening, the part of the cover body buckled on the first opening is cylindrical, the workbench is provided with a rotatable turntable, the turntable is fixed opposite to the cover body, and the turntable is configured to drive the furnace cover to rotate relative to the partition plate. The small bell furnace testing machine provided by the application can widen the application range of the bell furnace.

Description

Technical Field

[0001] This application relates to the field of materials processing, and more specifically, to a small bell-shaped furnace testing machine. Background Technology

[0002] A bell-and-jar furnace is a common heat treatment device widely used in materials processing, metal heat treatment, and ceramic sintering. Its basic structure consists of a furnace body, heating elements, a temperature control system, and a sealing hood. During operation, the air inside the furnace is heated to a set temperature via resistance heating elements, and the workpiece is heated evenly through heat conduction and convection. Furthermore, bell-and-jar furnaces are easy to operate, have low maintenance costs, and their temperature profiles can be flexibly configured according to process requirements, adapting to various scenarios from laboratory research and development to industrial production. With the development of materials science, bell-and-jar furnaces continue to play a crucial role in the preparation of novel alloys, semiconductor materials, and composite materials. Summary of the Invention

[0003] This application provides a small bell-shaped furnace testing machine, which can broaden the application range of bell-shaped furnaces.

[0004] Specifically, this application is implemented through the following technical solution: One aspect of this application provides a small bell-shaped furnace testing machine, including... The furnace body has a furnace cavity inside, and a first opening is provided at the lower end of the furnace cavity. A downwardly extending partition plate is fixed to the top wall inside the furnace body, and the partition plate divides the furnace cavity into a first sintering zone and a second sintering zone. A furnace cover, comprising a cover body and a sintering plate, wherein the sintering plate is placed on top of the cover body; A lifting device, located on the lower side of the furnace body, includes a liftable worktable, the cover is placed on the worktable, and the worktable is configured to lift and push the cover to engage with the first opening; The first opening is a circular opening, and the part of the cover that engages with the first opening is cylindrical. The workbench is provided with a rotatable turntable, which is fixed relative to the cover. The turntable is configured to drive the furnace cover to rotate relative to the partition plate.

[0005] Optionally, the lifting device includes two first and second supports that are intersecting and rotatably connected, the first and second supports being rectangular, and the lifting device also includes a base arranged parallel to the worktable; On the same side of the workbench and the base, one end of the first bracket is hinged to the workbench, one end of the second bracket is hinged to the base, the other end of the first bracket is slidably connected to the base, and the other end of the second bracket is slidably connected to the workbench. The lifting device also includes an electric telescopic rod, the movable end of which is drivenly connected to the first bracket, pushing the first bracket to slide relative to the base, thereby driving the workbench to rise and fall relative to the base.

[0006] Optionally, the bell-shaped furnace testing machine further includes a driving device, the worktable has a circular slot, the turntable is installed in the circular slot, and a through hole is provided at the bottom of the slot. The driving end of the driving device passes through the through hole and is connected to the turntable for transmission. The worktable is also provided with a limiting member that abuts against the top surface of the turntable.

[0007] Optionally, the workbench includes a receiving space formed above the turntable, and the limiting member is configured to extend or retract movably from or into the receiving space.

[0008] Optionally, the partition plate has multiple air blowing ports on its bottom surface facing the first opening, and the multiple air blowing ports are evenly distributed along the length direction of the bottom surface of the partition plate. The multiple air blowing ports are used to blow out inert gas and form an air screen, which together with the partition plate separates the first sintering zone and the second sintering zone.

[0009] Optionally, the sintered plate is mesh-like.

[0010] Optionally, the sintered plate is fixed to the cover by a plurality of rod-shaped supports.

[0011] Optionally, the cover includes an insertion portion that engages with the first opening, and a sealing shoulder portion with a diameter larger than the insertion portion and located outside the furnace body.

[0012] Optionally, a heat insulation plate is provided between the cover and the worktable, and the heat insulation plate is fixed to the cover and the turntable respectively.

[0013] This application provides a small bell-shaped furnace testing machine that divides the furnace cavity into a first sintering zone and a second sintering zone by setting a partition plate. It also includes a rotatable turntable that can move the material placed on the sintering plate between the first and second sintering zones, achieving different stages of sintering in each zone. This partitioned sintering method enables precise control of the sintering process, flexibly adjusting the temperature and material residence time in each zone according to different process requirements, thereby improving sintering efficiency, reducing energy consumption, meeting the sintering needs of different types of materials, and broadening the applicability of the bell-shaped furnace. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a small bell-shaped furnace shown in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the interior of a small bell-shaped furnace shown in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of a lifting device shown in an exemplary embodiment of this application; Figure 4 This is a top view of the workbench shown in an exemplary embodiment of this application; Figure 5 This is a schematic cross-sectional view of the turntable shown in an exemplary embodiment of this application; Figure 6 This is a bottom-up view of the furnace cavity of a small bell-shaped furnace as illustrated in an exemplary embodiment of this application.

[0015] Wherein: 100, furnace body; 110, furnace cavity; 111, first sintering zone; 112, second sintering zone; 110a, first opening; 120, partition plate; 120a, air blowing port; 200, furnace cover; 210, cover body; 211, insertion part; 212, sealing shoulder; 220, sintering plate; 221, rod-shaped support; 300, lifting device; 310, workbench; 311, slot; 312, limiting component; 313, accommodating space; 320, turntable; 321, driving device; 331, first support; 332, second support; 340, base; 350, electric telescopic rod; 400, heat insulation plate; A, material. Detailed Implementation

[0016] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0017] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0018] Please refer to Figure 1 and Figure 2This application provides a small bell-shaped furnace testing machine, including a furnace body 100, a furnace cover 200, and a lifting device 300. The furnace body 100 has an internal furnace cavity 110, with a first opening 110a at the lower end. A downwardly extending partition plate 120 is fixed to the top wall inside the furnace body 100, dividing the furnace cavity 110 into a first sintering zone 111 and a second sintering zone 112. In addition to the top wall inside the furnace body 100, the partition plate 120 can also abut against the side wall of the furnace body 100 to form two relatively independent sintering zones with separable temperatures. For example, one zone can be designated as a preheating sintering zone, and the other as a high-temperature sintering zone. Specifically, two independent heating pipes can be embedded in the side wall of the furnace body 100 surrounding the first sintering zone 111 and the second sintering zone 112 to heat the first sintering zone 111 and the second sintering zone 112 respectively, thereby achieving independent temperature control of the two zones. The partition plate 120 can be made of ceramic or refractory materials, such as alumina ceramic or clay bricks.

[0019] Combination Figure 3 and Figure 4 The furnace cover 200 includes a cover body 210 and a sintering plate 220. The sintering plate 220 is placed above the cover body 210, and the material A to be sintered is placed on the sintering plate 220. After the furnace cover 200 and the furnace body 100 are closed, the sintering plate 220 enters the furnace cavity 110 to carry out the sintering operation. The lifting device 300 is located on the lower side of the furnace body 100. The lifting device 300 includes a liftable worktable 310. The cover body 210 is placed on the worktable 310, and the worktable 310 is configured to lift and push the cover body 210 to engage with the first opening 110a. Here, the lifting device 300 can first push the cover body 210 to a position directly opposite the first opening 110a, and then lift the worktable 310 to engage the cover body 210 with the first opening 110a, thus sending the sintering plate 220 into the furnace cavity 110.

[0020] The first opening 110a is circular, and the part of the cover 210 that engages with the first opening 110a is cylindrical. The worktable 310 is equipped with a rotatable turntable 320, which is fixed relative to the cover 210. The turntable 320 is configured to drive the furnace cover 200 to rotate relative to the partition plate 120. Specifically, the turntable 320 can drive the cover 210 and the sintering plate 220 placed on it to rotate together, thereby causing the sintering plate 220 to rotate within the furnace cavity 110, which in turn drives the material A placed on the sintering plate 220 to switch between the first sintering zone 111 and the second sintering zone 112, realizing the sintering of material A in different temperature zones.

[0021] Material A is sintered in two sintering zones, for example, the first sintering zone 111 is a pre-sintering zone, and the second sintering zone 112 is a high-temperature sintering zone. On one hand, the preheating sintering zone allows for initial heating of the material, ensuring uniform heating and gradually reaching the appropriate sintering starting temperature. This helps eliminate internal stress and prevents cracking caused by excessive temperature differences. On the other hand, the high-temperature sintering zone further enhances the sintering degree, promoting densification, grain growth, and other reactions, thereby improving product quality and performance. Furthermore, this zoned sintering method allows for precise control of the sintering process, flexibly adjusting the temperature and residence time of materials in each zone according to different process requirements. This improves sintering efficiency, reduces energy consumption, meets the sintering needs of different types of materials, and broadens the applicability of the bell-shaped furnace. The lifting device 300 can be a hydraulic lifting device 300, a pneumatic lifting device 300, a screw-type lifting device 300, etc. The relative vertical positions mentioned here are based on the assumption that the bell-shaped furnace is placed on the ground for normal use.

[0022] refer to Figure 3In one embodiment, the lifting device 300 includes two mutually intersecting and rotatably connected first supports 331 and second supports 332, which are rectangular. The lifting device 300 also includes a base 340 arranged parallel to the worktable 310. On the same side of the worktable 310 and the base 340, one end of the first support 331 is hinged to the worktable 310, and one end of the second support 332 is hinged to the base 340. The other end of the first support 331 is slidably connected to the base 340, and the other end of the second support 332 is slidably connected to the worktable 310. The lifting device 300 also includes an electric telescopic rod 350, the movable end of which is drivenly connected to the first support 331, pushing the first support 331 to slide relative to the base 340, thereby raising and lowering the worktable 310 relative to the base 340. With this structure, when the electric telescopic rod 350 is activated, pushing the first support 331 to slide relative to the base 340, a series of linkage reactions are triggered. For example, when the first support 331 slides closer to the second support 332, the angle between the first support 331 and the base 340 gradually increases. Since the length of the first support 331 remains constant, this change causes the end of the first support 331 connected to the worktable 310 to shift upwards, thereby raising the worktable 310. Simultaneously, the second support 332 is linked to the first support 331, and the end of the second support 332 connected to the worktable 310 slides closer to the first support 331, working together to continuously raise the worktable 310. In this way, the lifting device 300 achieves precise electric lifting control of the worktable 310. This shear-type lifting device 300 has a compact structure, small footprint, and stable operation, and can precisely adjust the lifting height of the worktable 310, ensuring sintering quality and process flexibility.

[0023] Combination Figure 4 and Figure 5In one embodiment, the bell-shaped furnace testing machine further includes a drive device 321. A circular slot 311 is provided on the worktable 310, and a turntable 320 is installed in the circular slot 311. A through hole is provided at the bottom of the slot 311. The drive end of the drive device 321 passes through the through hole and is connected to the turntable 320 for transmission. The worktable 310 is also provided with a limiting member 312 that abuts against the top surface of the turntable 320. The slot 311 and the limiting member 312 provided in this embodiment can limit the turntable 320 in the vertical direction without restricting its rotation on the worktable 310, ensuring stability and reducing wobbling during rotation. The drive device 321 facilitates the automated rotation of the sintering plate 220. The drive device 321 can be an electric motor, pneumatic motor, or hydraulic motor, and its output shaft is connected to the turntable 320 shaft via a coupling or gear to drive the rotation of the turntable 320. The joint rotation of the cover 210 and the turntable 320 can be achieved by utilizing the frictional force between them, or by fixing them directly together.

[0024] In one embodiment, combined with Figure 5 The worktable 310 includes a receiving space 313 formed above the turntable 320. A limiting member 312 is configured to extend or retract movably from or into the receiving space 313. The floor of the receiving space 313 is at the same height as the top surface of the turntable 320. Thus, when placing the turntable 320 into the slot 311, the limiting member 312 can be fully moved into the receiving space 313 first. After placing the turntable 320 into the slot 311, the limiting member 312 can be removed from the receiving space 313 and fixed, axially limiting the turntable 320. The limiting member 312 can be a bolt, slide rail, or spring clip structure. It can be installed in the receiving space 313 via a slide rail, and after sliding to a suitable position, the bolt can be tightened or the elastic deformation of the spring clip can be used to achieve fixation.

[0025] Combination Figure 6In one embodiment, the partition plate 120 has multiple air blowing ports 120a on its bottom surface facing the first opening 110a, and these ports are evenly distributed along the length of the bottom surface of the partition plate 120. The multiple air blowing ports 120a are used to blow out inert gas and form an air screen. The air screen and the partition plate 120 together separate the first sintering zone 111 and the second sintering zone 112. This application can further separate the first sintering zone 111 and the second sintering zone 112 without affecting the rotation and switching of material A between the two zones. When material A rotates to the corresponding zone, the air screen can effectively block heat exchange and interference, maintain stable temperature in each zone, and improve sintering quality. Air blowing can be stopped when material A is switched, ensuring smooth rotation of material A. Specifically, an air source, such as a high-pressure nitrogen cylinder or air pump, can be installed outside the furnace body 100, connected to each air blowing port 120a via a pipeline equipped with a solenoid valve. When the sintering plate 220 rotates to the target area, the control solenoid valve is energized, and nitrogen gas is sprayed out from the blowing port 120a to form an air screen; when material A switches to the sintering zone, the solenoid valve is de-energized, the blowing stops, and the rotation of material A is not hindered.

[0026] Combination Figure 2 and Figure 4 In one embodiment, the sintering plate 220 is a mesh. The mesh of the sintering plate 220 allows for more direct and comprehensive heat contact with the material A, reducing local temperature differences and airflow variations in the material A, and improving sintering uniformity.

[0027] In another embodiment, the sintering plate 220 is fixed to the cover 210 by a plurality of rod-shaped supports 221. The plurality of rod-shaped supports 221 raise the sintering plate 220, which facilitates the uniform flow of hot air from bottom to top through the material A placed on the sintering plate 220, ensuring that the bottom of the material A is heated from all directions, further improving the sintering uniformity and avoiding sintering defects caused by uneven heating.

[0028] In one embodiment, the cover 210 includes an insertion portion 211 that engages with the first opening 110a, and a sealing shoulder portion 212 with a diameter larger than the insertion portion 211 and located outside the furnace body 100. The sealing shoulder portion 212 of the cover 210 has a larger diameter than the insertion portion 211 and is located outside the furnace body 100. The pressure provided by the lifting device 300 allows it to fit tightly against the furnace body 100, forming a good external seal to prevent external air from seeping into the furnace cavity 110. Simultaneously, it cooperates with the internal seal of the insertion portion 211 to enhance the overall sealing performance, ensuring a stable sintering atmosphere inside the furnace and facilitating sintering quality control.

[0029] In one embodiment, a heat insulation plate 400 is provided between the cover 210 and the worktable 310, and the heat insulation plate 400 is fixed to both the cover 210 and the turntable 320. The heat insulation plate 400 can effectively block the heat generated during the sintering of the furnace body 100 from being transferred to the turntable 320 and the drive device 321, reducing the impact of heat on the turntable 320 and the drive device 321, reducing component damage and performance degradation caused by high temperatures, and extending the service life of the equipment. The heat insulation plate 400 can be made of materials such as ceramic fiber board or asbestos board.

[0030] It should be noted that the technical solutions or features described in the above embodiments can be combined or complemented by each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modifications made within the spirit and principles of this application are permitted.

Claims

1. A small bell-shaped furnace testing machine, characterized in that, include A furnace body (100) is provided inside a furnace cavity (110), and a first opening (110a) is provided at the lower end of the furnace cavity (110). A downwardly extending partition plate (120) is fixed on the top wall inside the furnace body (100), and the partition plate (120) divides the furnace cavity (110) into a first sintering zone (111) and a second sintering zone (112). A furnace cover (200) includes a cover body (210) and a sintering plate (220), the sintering plate (220) being placed above the cover body (210); A lifting device (300) is located on the lower side of the furnace body (100) and includes a liftable worktable (310). The cover (210) is placed on the worktable (310) and the worktable (310) is configured to lift and push the cover (210) to engage with the first opening (110a). The first opening (110a) is a circular opening, and the part of the cover (210) that engages with the first opening (110a) is cylindrical. The workbench (310) is provided with a rotatable turntable (320), which is fixed relative to the cover (210). The turntable (320) is configured to drive the furnace cover (200) to rotate relative to the partition plate (120).

2. The small bell-shaped furnace testing machine as described in claim 1, characterized in that, The bell-shaped furnace testing machine also includes a drive device (321), the worktable (310) has a circular slot (311), the turntable (320) is installed in the circular slot (311), and a through hole is provided at the bottom of the slot (311). The drive end of the drive device (321) passes through the through hole and is connected to the turntable (320) for transmission. The worktable (310) is also provided with a limiting member (312) that abuts against the top surface of the turntable (320).

3. The small bell-shaped furnace testing machine as described in claim 2, characterized in that, The workbench (310) includes a receiving space (313) formed above the turntable (320), and the limiting member (312) is configured to extend or retract movably from or into the receiving space (313).

4. The small bell-shaped furnace testing machine as described in claim 1, characterized in that, The partition plate (120) has a plurality of air blowing ports (120a) on its bottom surface facing the first opening (110a), and the plurality of air blowing ports (120a) are evenly distributed along the length direction of the bottom surface of the partition plate (120). The plurality of air blowing ports (120a) are used to blow out inert gas and form an air screen, which together with the partition plate (120) separates the first sintering zone (111) and the second sintering zone (112).

5. The small bell-shaped furnace testing machine as described in claim 1, characterized in that, The sintered plate (220) is grid-shaped.

6. The small bell-shaped furnace testing machine as described in claim 5, characterized in that, The sintered plate (220) is fixed to the cover (210) by a plurality of rod-shaped supports (221).

7. The small bell-shaped furnace testing machine as described in claim 1, characterized in that, The cover (210) includes an insertion part (211) that engages with the first opening (110a) and a sealing shoulder part (212) with a diameter greater than the insertion part (211) and located outside the furnace body (100).

8. The small bell-shaped furnace testing machine as described in claim 1, characterized in that, A heat insulation plate (400) is provided between the cover (210) and the worktable (310), and the heat insulation plate (400) is fixed to the cover (210) and the turntable (320) respectively.

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