Hexagonal boron nitride high-temperature sintering furnace

Abstract

The utility model discloses hexagonal boron nitride high temperature sintering furnace, including sintering furnace shell, the front side inner wall of sintering furnace shell is equipped with fixed inner lining shell, and the inside of fixed inner lining shell is equipped with heating body mounting slot respectively, and the inside of heating body mounting slot is equipped with heating body respectively, still including movable lining mechanism, movable lining mechanism: it includes movable inner lining shell, slot, heating body lining, frame board and spacing insertion pipe, movable inner lining shell is located the inside of fixed inner lining shell, and the inside of movable inner lining shell is equipped with slot respectively, and this hexagonal boron nitride high temperature sintering furnace, through the separation of heating body lining, movable inner lining shell and heating body in proper order, the lining part of high temperature sintering furnace is convenient to disassemble, is convenient to carry out the overall cleaning to high temperature sintering furnace inside after every hexagonal boron nitride sintering is completed, guarantees the quality of subsequent hexagonal boron nitride sintering.

Description

Technical Field

[0001] This utility model relates to the field of hexagonal boron nitride technology, specifically a hexagonal boron nitride high-temperature sintering furnace. Background Technology

[0002] Hexagonal boron nitride is a synthetic inorganic material, a hexagonal network-like layered crystal composed of nitrogen and boron atoms. It is the only phase of boron nitride found in nature. It appears as a soft, loose, smooth, hygroscopic white powder. The production of hexagonal boron nitride requires high-temperature sintering to achieve the required purity. The existing technology, authorized by publication number CN 223179278, pertains to this material. U proposes a high-temperature ceramic sintering furnace, comprising: a sintering furnace shell, one end of which is connected to a sintering furnace door panel via a hinge; two ends of one side of the sintering furnace door panel are fixedly mounted with connecting shafts; locking blocks are movably fitted onto the surfaces of the two connecting shafts; L-shaped latches are fixedly mounted on both ends of one side of the sintering furnace shell; a pulley assembly is provided on the surface of the sintering furnace shell; a firing assembly is provided inside the sintering furnace shell; and a moving assembly is provided at the bottom of the firing assembly. Although it can achieve the sintering of hexagonal boron nitride, its inner lining components are always in a fixed state with the furnace body, making it inconvenient to clean the inside of the sintering furnace after sintering. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-temperature sintering furnace for hexagonal boron nitride. By separating the heating inner lining, the movable inner lining shell and the heating element in sequence, the inner lining components of the high-temperature sintering furnace can be easily disassembled. This facilitates a thorough cleaning of the interior of the high-temperature sintering furnace after each hexagonal boron nitride sintering, ensuring the quality of subsequent hexagonal boron nitride sintering and effectively solving the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hexagonal boron nitride high-temperature sintering furnace, including a sintering furnace shell, a fixed inner liner shell provided on the front inner wall of the sintering furnace shell, a heating element mounting groove provided on the inner side of the fixed inner liner shell, a heating element provided inside the heating element mounting groove, and a movable inner liner mechanism. The movable inner liner mechanism includes a movable inner liner shell, slots, a heating element inner liner, frame plates, and limiting tubes. The movable inner liner shell is located inside the fixed inner liner shell. Slots are provided on the inner side of the movable inner liner shell, and heating elements are inserted into the slots. The heating elements are respectively set inside the heating elements inner liner. The frame plates are longitudinally slidably connected to the outer side of the fixed inner liner shell. The opposing inner sides of the two frame plates are provided with limiting tubes that cooperate with the heating elements inner liner. By separating the heating elements inner liner, movable inner liner shell, and heating elements in sequence, the inner liner components of the high-temperature sintering furnace can be easily disassembled. This facilitates a thorough cleaning of the interior of the high-temperature sintering furnace after each hexagonal boron nitride sintering, ensuring the quality of subsequent hexagonal boron nitride sintering.

[0005] Furthermore, the heating element liner includes an inner shell, a sliding tube, and a sliding hole. The inner shell is inserted into the interior of the slot. The inner shell has sliding holes on both the front and rear inner walls. The sliding tube is longitudinally slidably connected inside each sliding hole. The heating element mounting slot has insertion holes on both the front and rear inner walls. The insertion holes cooperate with the sliding tubes for installation, which facilitates temporary positioning of the inner shell inside the heating element mounting slot.

[0006] Furthermore, the heating element liner also includes a lever plate, which is respectively disposed on the outer arc surface of the slide tube and is longitudinally slidably connected to the inside of the inner liner shell to facilitate the movement of the slide tube.

[0007] Furthermore, the heating element liner also includes support plates and positioning grooves. The support plates are respectively disposed at the front and rear ends of the inner liner shell. The surface of each support plate is provided with positioning grooves. Positioning discs are provided at the front and rear ends of the heating element. The outer arc surface of the positioning discs is provided with clearance grooves that cooperate with the straight grooves of the positioning grooves to determine the position of the heating element inside the inner liner shell.

[0008] Furthermore, a PLC controller is provided on the right side of the sintering furnace shell. The input terminal of the PLC controller is electrically connected to an external power source. The heating element is an electric heating tube, and the input terminal of the heating element is electrically connected to the output terminal of the PLC controller to control the start and stop of the entire device.

[0009] Furthermore, the inner wall of the sintering furnace shell is provided with electric push rods, and the telescopic ends of the electric push rods are fixedly connected to the adjacent frame plates to provide power for the movement of the frame plates.

[0010] Furthermore, the inner wall of the sintering furnace shell and the outer side of the fixed inner lining shell are filled with heat-insulating fiberboard to block the transfer of heat to the outside.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This hexagonal boron nitride high-temperature sintering furnace has the following advantages: By separating the heating element, the movable inner liner shell, and the heating element in sequence, the inner lining components of the high-temperature sintering furnace can be easily disassembled. This facilitates a thorough cleaning of the interior of the high-temperature sintering furnace after each hexagonal boron nitride sintering, ensuring the quality of subsequent hexagonal boron nitride sintering. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the sintering furnace shell of this utility model; Figure 3 This is a schematic diagram of the movable inner lining mechanism of this utility model; Figure 4 This is a structural schematic diagram of the overall device of this utility model, viewed from the front and in cross-section. Figure 5 This is a structural schematic diagram of the overall device of this utility model, taken from the front view and exploded. Figure 6 This is a schematic diagram of the exploded portion of the movable inner lining mechanism of this utility model; Figure 7 This is a side view sectional diagram of the overall device of this utility model; Figure 8 This is an enlarged structural diagram of point A in this utility model.

[0013] In the figure: 1 Sintering furnace outer shell, 2 Fixed inner lining shell, 3 Heating element mounting groove, 4 Heating element, 5 Movable inner lining mechanism, 51 Movable inner lining shell, 52 Slot, 53 Heating element inner lining, 531 Inner lining shell, 532 Support plate, 533 Positioning slide, 534 Slide tube, 535 Toggle plate, 536 Slide hole, 54 Frame plate, 55 Limiting insertion tube, 6 PLC controller, 7 Electric push rod, 8 Positioning plate, 9 Insertion hole, 10 Heat insulation fiber board. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-8This embodiment provides a technical solution: a hexagonal boron nitride high-temperature sintering furnace, including a sintering furnace shell 1, which can be a stainless steel shell to provide space for the high-temperature sintering of hexagonal boron nitride. The front inner wall of the sintering furnace shell 1 is provided with a fixed inner lining shell 2, which can be an alumina ceramic shell to protect the furnace body from the effects of high temperature. The inner side of the fixed inner lining shell 2 is provided with heating element mounting grooves 3 to provide space for the installation of heating elements. The heating element mounting grooves 3 are all provided with heating elements 4, which can be silicon carbide heating tubes. It also includes a movable inner lining mechanism 5. The movable inner liner mechanism 5 includes a movable inner liner shell 51, slots 52, a heating element inner liner 53, frame plates 54, and limiting tubes 55. The movable inner liner shell 51 is located inside the fixed inner liner shell 2. Slots 52 are provided on the inner side of the movable inner liner shell 51, and heating element inner liners 53 are inserted into the slots 52. Heating elements 4 are respectively disposed inside the heating element inner liners 53. Frame plates 54 are longitudinally slidably connected to the outer side of the fixed inner liner shell 2. Limiting tubes 55 are provided on the opposite inner sides of the two frame plates 54 to cooperate with the heating element inner liner 53. When the two frame plates 54 move relative to each other, the limiting tubes 55 are inserted into the sliding tubes 534 to firmly limit the position of the inner liner shell 531. At the same time, the sockets on the surface of the frame plates 54 are connected to the plugs at the ends of the heating elements 4. Next, the electrical connection to the heating element 4 is completed. When the two frame plates 54 separate relative to each other, the limiting insert 55 leaves the interior of the sliding tube 534, releasing the firm limiting of the inner liner shell 531. At the same time, the connecting socket on the surface of the frame plate 54 separates from the plug at the end of the heating element 4, releasing the electrical connection of the heating element 4. The heating element inner liner 53 includes an inner liner shell 531, a sliding tube 534, and a sliding hole 536. The inner liner shell 531 is inserted into the interior of the slot 52. The front and rear inner walls of the inner liner shell 531 are provided with sliding holes 536. The sliding tube 534 is longitudinally slidably connected inside the sliding holes 536. The front and rear inner walls of the heating element mounting slot 3 are provided with insertion holes 9. The insertion holes 9 are installed in conjunction with the sliding tube 534. The sliding tube 534 is pushed out of the insertion hole 9 by the lever 535, releasing the limiting of the inner liner shell 531. The time limit position allows the inner liner 531 to be pulled out of the slot 52. Similarly, when the sliding hole 536 and the insertion hole 9 are longitudinally aligned, the sliding tube 534 is pushed into the insertion hole 9 to temporarily limit the position of the inner liner 531. The heating element liner 53 also includes a lever 535, which is respectively set on the outer arc surface of the sliding tube 534. The lever 535 is longitudinally slidably connected to the inside of the inner liner 531 to facilitate the movement of the sliding tube 534. The heating element liner 53 also includes a support plate 532 and a positioning groove 533. The support plate 532 is respectively set at the front and rear ends of the inside of the inner liner 531. The surface of the support plate 532 is provided with a positioning groove 533. The front and rear ends of the heating element 4 are provided with positioning plates 8. The outer arc surface of the positioning plate 8 is provided with a positioning groove 533. The straight groove is fitted with a clearance groove. Rotating the heating element 4 causes the positioning disk 8 to rotate within the circular groove of the positioning slide 533 until the clearance groove on the outer arc surface of the positioning disk 8 is parallel to the straight groove of the positioning slide 533. At this point, the positioning disk 8 can be pushed in and slide within the straight groove of the positioning slide 533 to remove the heating element 4 from the inner liner shell 531. The surface of the heating element 4 is then cleaned. Rotating the positioning disk 8 causes the clearance groove on the outer arc surface of the positioning disk 8 to form a certain angle with the straight groove of the positioning slide 533, preventing the positioning disk 8 from leaving the circular groove of the positioning slide 533. This completes the positioning of the heating element 4 and the inner liner shell 531. A PLC controller 6 is located on the right side of the sintering furnace outer shell 1 to control the start and stop of the entire device. The input terminal of the PLC controller 6 is electrically connected to an external power supply.The heating element 4 is an electric heating tube. The input end of the heating element 4 is electrically connected to the output end of the PLC controller 6. Electric push rods 7 are respectively installed on the inner wall of the sintering furnace outer shell 1. The telescopic ends of the electric push rods 7 are fixedly connected to adjacent frame plates 54, providing power for the movement of the frame plates 54. Because the frame plates 54 can only slide longitudinally, radial force on the telescopic ends of the electric push rods 7 can be avoided, preventing damage. A heat-insulating fiberboard 10 is filled between the inner wall of the sintering furnace outer shell 1 and the outer surface of the fixed inner lining shell 2 to prevent heat dissipation to the outside. Simultaneously, the electric push rods 7 are located between the heat-insulating fiberboard 10 and the inner wall of the sintering furnace outer shell 1, preventing temperature transfer to the electric push rods 7 and reducing the impact of high temperature on the operation of the electric push rods 7.

[0016] The working principle of the hexagonal boron nitride high-temperature sintering furnace provided by this utility model is as follows: During the production process of hexagonal boron nitride, the furnace cover of the sintering furnace shell 1 is opened, and the mold containing hexagonal boron nitride powder is placed inside the movable inner liner shell 51. Then, the furnace cover of the sintering furnace shell 1 is closed, and the heating element 4 is started through the PLC controller 6. The heat generated by the heating element 4 is used to sinter the hexagonal boron nitride. After the hexagonal boron nitride is sintered and removed from the movable inner liner shell 51, the electric push rod 7 can be started. The telescopic end of the electric push rod 7 drives the two frame plates 54 to separate relative to each other, so that the limiting insertion tube 55 leaves the inside of the sliding tube 534. The secure restraint on the inner liner shell 531 is removed, and the connecting socket on the surface of the frame plate 54 is disconnected from the plug at the end of the heating element 4, thus canceling the electrical connection of the heating element 4. At this time, the slide tube 534 can be pushed away from the insertion hole 9 by the lever 535, thus canceling the temporary restraint on the inner liner shell 531 and pulling the inner liner shell 531 out of the slot 52. After all the inner liner shells 531 have left the slot 52, the movable inner liner shell 51 can be pulled out from the fixed inner liner shell 2 to facilitate cleaning of the inside of the high-temperature sintering furnace. Then, the heating element 4 can be rotated to make the positioning plate 8 rotate in the circular groove of the positioning slide 533 until it is positioned. The clearance groove on the outer arc surface of the positioning disc 8 is parallel to the straight groove of the positioning slide 533. At this time, the positioning disc 8 can be pushed into and slid in the straight groove of the positioning slide 533 to remove the heating element 4 from the inner liner shell 531. The surface of the heating element 4 is cleaned. After cleaning, the above operation is repeated in reverse. The movable inner liner shell 51 is inserted into the fixed inner liner shell 2. First, the positioning disc 8 is pushed from the straight groove of the positioning slide 533 into the circular groove of the positioning slide 533. Then, the positioning disc 8 is rotated so that the clearance groove on the outer arc surface of the positioning disc 8 forms a certain angle with the straight groove of the positioning slide 533, preventing the positioning disc 8 from leaving the positioning slide 531. Inside the circular groove 3, the heating element 4 and the inner liner 531 are positioned. Then, the inner liner 531 is inserted into the heating element mounting groove 3 through the slot 52. When the sliding hole 536 and the insertion hole 9 are longitudinally aligned, the sliding tube 534 is pushed into the insertion hole 9 to temporarily limit the position of the inner liner 531. Finally, the electric push rod 7 is activated. The telescopic end of the electric push rod 7 drives the two frame plates 54 to move relative to each other, so that the limiting insertion tube 55 is inserted into the sliding tube 534 to firmly limit the position of the inner liner 531. At the same time, the socket on the surface of the frame plate 54 is connected to the plug at the end of the heating element 4 to complete the electrical connection of the heating element 4.

[0017] It is worth noting that the PLC controller 6 disclosed in the above embodiments can be an IVC1 model PLC controller, and the heating element 4 and electric actuator 7 can be freely configured according to the actual application scenario. The heating element 4 can be a 3-segment silicon carbide rod, and the electric actuator 7 can be a DTZ10000 model electric actuator. The PLC controller 6 controls the operation of the heating element 4 and the electric actuator 7 using methods commonly used in the prior art.

[0018] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hexagonal boron nitride high-temperature sintering furnace, comprising a furnace shell (1), wherein a fixed inner liner shell (2) is provided on the front inner wall of the furnace shell (1), and a heating element mounting groove (3) is provided on the inner side of the fixed inner liner shell (2), and a heating element (4) is provided inside each heating element mounting groove (3), characterized in that: It also includes a movable lining mechanism (5); The movable inner liner mechanism (5) includes a movable inner liner shell (51), a slot (52), a heating inner liner (53), a frame plate (54), and a limiting tube (55). The movable inner liner shell (51) is located inside the fixed inner liner shell (2). The inner side of the movable inner liner shell (51) is provided with a slot (52). The heating inner liner (53) is inserted into the slot (52). The heating element (4) is respectively set inside the heating inner liner (53). The frame plate (54) is longitudinally slidably connected to the outer side of the fixed inner liner shell (2). The inner sides of the two frame plates (54) are provided with limiting tubes (55) that cooperate with the heating inner liner (53).

2. The hexagonal boron nitride high-temperature sintering furnace according to claim 1, characterized in that: The heating element liner (53) includes an inner shell (531), a sliding tube (534) and a sliding hole (536). The inner shell (531) is inserted into the slot (52). The inner shell (531) has a sliding hole (536) on both the front and rear inner walls. The sliding tube (534) is longitudinally slidably connected inside the sliding hole (536). The heating element mounting slot (3) has a socket (9) on both the front and rear inner walls. The socket (9) is installed in conjunction with the sliding tube (534).

3. The hexagonal boron nitride high-temperature sintering furnace according to claim 2, characterized in that: The heating inner liner (53) also includes a dial plate (535), which is respectively disposed on the outer arc surface of the slide tube (534) and is longitudinally slidably connected to the inside of the inner liner shell (531).

4. The hexagonal boron nitride high-temperature sintering furnace according to claim 2, characterized in that: The heating element inner liner (53) also includes a support plate (532) and a positioning groove (533). The support plate (532) is respectively set at the front and rear ends of the inner liner shell (531). The surface of the support plate (532) is provided with a positioning groove (533). The front and rear ends of the heating element (4) are provided with positioning discs (8). The outer arc surface of the positioning disc (8) is provided with a clearance groove that cooperates with the straight groove of the positioning groove (533).

5. The hexagonal boron nitride high-temperature sintering furnace according to claim 1, characterized in that: The right side of the sintering furnace shell (1) is provided with a PLC controller (6). The input terminal of the PLC controller (6) is electrically connected to an external power source. The heating element (4) is an electric heating tube. The input terminal of the heating element (4) is electrically connected to the output terminal of the PLC controller (6).

6. The hexagonal boron nitride high-temperature sintering furnace according to claim 5, characterized in that: The inner wall of the sintering furnace shell (1) is provided with electric push rods (7), and the telescopic ends of the electric push rods (7) are fixedly connected to the adjacent frame plates (54).

7. The hexagonal boron nitride high-temperature sintering furnace according to claim 1, characterized in that: The inner wall of the sintering furnace shell (1) and the outer side of the fixed inner lining shell (2) are filled with heat-insulating fiberboard (10).

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