Efficient microwave coupling device of silicon nitride microwave sintering furnace

Abstract

The utility model discloses an efficient microwave coupling device of a silicon nitride microwave sintering furnace, which relates to the technical field of microwave coupling and comprises a base, a furnace body is fixedly mounted on the top surface of the base, an opening is formed in the top surface of the furnace body, and turntables are symmetrically and rotatably connected to the outer side of the furnace body. When the device is used, a silicon nitride block is clamped and fixed through the clamping mechanism, and the moving mechanism is matched with the rotating mechanism to enable silicon nitride clamped on the rotating seat to slide up and down and rotate at the same time, so that the position of the silicon nitride in the furnace body is convenient to change; and each side surface of the silicon nitride can uniformly absorb microwaves, and the temperature difference between the edge and the center is eliminated, so that the microwave sintering effect of the silicon nitride is improved.

Description

Technical Field

[0001] This utility model relates to the field of microwave coupling technology, and in particular to a high-efficiency microwave coupling device for silicon nitride microwave sintering furnace. Background Technology

[0002] Silicon nitride, as an important structural ceramic material, is widely used in aerospace, mechanical engineering, and electronic information fields due to its high hardness, high temperature resistance, corrosion resistance, and good thermal shock resistance. Traditional sintering processes rely on external heat sources to heat the green body through conduction and convection, which suffers from slow heating rates, high energy consumption, and a tendency to cause abnormal grain growth, making it difficult to meet the requirements for preparing high-performance silicon nitride ceramics. In contrast, microwave sintering technology, due to its volumetric heating characteristics, can achieve rapid heating, shorten the sintering cycle by more than 50%, and suppress grain coarsening, making it a research hotspot in recent years.

[0003] However, during microwave sintering, the standing wave field formed by microwaves in the resonant cavity causes the energy density of the edge region of the blank to be higher than that of the center region, resulting in a large temperature gradient difference between the two. Since the silicon nitride blank is usually left undisturbed after being placed in the furnace, the presence of microwaves in the blank leads to unevenness in the silicon nitride, which affects the sintering quality of silicon nitride. In view of this, this application proposes a high-efficiency microwave coupling device for silicon nitride microwave sintering furnace. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency microwave coupling device for silicon nitride microwave sintering furnaces.

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

[0006] A high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace includes a base, a furnace body fixedly mounted on the top surface of the base, an opening on the top surface of the furnace body, turntables symmetrically rotatably connected to the outer side of the furnace body, an electric telescopic rod fixedly mounted on the outer side of each turntable, a top cover mounted on the top of two electric telescopic rods, a sealing seat fixedly mounted on the bottom surface of the top cover and engaged within the opening, a gear ring mounted on the outer side of one of the turntables, a fixed seat fixedly mounted on the outer side of the furnace body, a first motor fixedly mounted on the outer side of the fixed seat, a drive gear mounted on the output shaft of the first motor and meshing with the gear ring, a movable seat slidably connected inside the furnace body, the furnace body driving the movable seat to slide up and down via a moving mechanism, two fixed plates symmetrically mounted on the top surface of the movable seat, the two fixed plates rotatably connected to a rotating seat, a clamping mechanism mounted on the top surface of the rotating seat, and the furnace body driving the rotating seat to rotate via the rotating mechanism.

[0007] Preferably, the rotating mechanism includes a rack, which is fixedly installed on the bottom wall of the furnace body. A driven gear is rotatably connected to the outer side of one of the fixed plates, and the driven gear meshes with the rack. The driven gear is coaxially connected to the rotating seat.

[0008] Preferably, the moving mechanism includes multiple guide rails, which are symmetrically installed on the bottom wall of the furnace body. Each guide rail is slidably connected to the moving seat. Multiple assembly plates are symmetrically installed on the top surface of the furnace body. Each pair of corresponding assembly plates is rotatably connected to a rotating shaft. Multiple high-temperature alloy wires are symmetrically wound on the outer side of each rotating shaft. The other end of each high-temperature alloy wire is fixedly connected to the top surface of the moving seat. A second motor is fixedly installed on the outer side of the multiple assembly plates. The output shaft of each second motor is coaxially connected to the rotating shaft corresponding to its position.

[0009] Preferably, the clamping mechanism includes two L-shaped plates, which are symmetrically mounted on the top surface of the rotating seat. Each L-shaped plate has two screws symmetrically threaded to its top surface. Each rotating seat has a pressure plate slidably connected to its outer side, and the bottom end of each screw is rotatably connected to the pressure plate corresponding to its position.

[0010] Preferably, a protective shell is fixedly installed on the top surface of the furnace body, and each assembly plate and rotating shaft is located inside the protective shell.

[0011] Preferably, multiple T-shaped blocks are symmetrically installed on the outer side of the movable seat, and each T-shaped block is slidably connected to a guide rail corresponding to its position, and the bottom end of each high-temperature alloy wire is fixedly installed on the top surface of the corresponding T-shaped block.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model uses a moving mechanism, a rotating mechanism, a moving seat, a fixed plate, a rotating seat, a clamping mechanism, and other devices to clamp and fix the silicon nitride block through the clamping mechanism. The moving mechanism, in conjunction with the rotating mechanism, allows the silicon nitride clamped on the rotating seat to slide up and down while rotating, thereby facilitating the change of position of the silicon nitride in the furnace. This ensures that all sides of the silicon nitride can absorb microwaves uniformly, eliminating the temperature difference between the edge and the center, and thus increasing the microwave sintering effect of the silicon nitride.

[0014] 2. This utility model, through the use of a first motor, an electric telescopic rod, and other devices, enables the rapid opening or closing of the opening by the cooperation of the first motor and the electric telescopic rod. Compared with the traditional method of sealing the furnace body by connecting multiple buckles, this method is more convenient to operate. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the high-efficiency microwave coupling device for the silicon nitride microwave sintering furnace proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the sealing seat installation structure of the high-efficiency microwave coupling device for the silicon nitride microwave sintering furnace proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the moving mechanism of the high-efficiency microwave coupling device for the silicon nitride microwave sintering furnace proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the rotating mechanism of the high-efficiency microwave coupling device for the silicon nitride microwave sintering furnace proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the clamping mechanism of the high-efficiency microwave coupling device for silicon nitride microwave sintering furnace proposed in this utility model.

[0020] In the diagram: 1. Base; 2. Furnace body; 3. Turntable; 4. Electric telescopic rod; 5. Top cover; 6. Fixed seat; 7. Opening; 8. Protective shell; 9. Gear ring; 10. Drive gear; 11. First motor; 12. Sealing seat; 13. Guide rail; 14. Moving seat; 15. Assembly plate; 16. Rotating shaft; 17. Second motor; 18. High-temperature alloy wire; 19. Rack; 20. Driven gear; 21. T-block; 22. Fixed plate; 23. Rotating seat; 24. L-shaped plate; 25. Pressure plate; 26. Screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] This utility model provides a technical solution: such as Figure 1-5 As shown, the high-efficiency microwave coupling device for silicon nitride microwave sintering furnace includes a base 1, a furnace body 2 fixedly installed on the top surface of the base 1, an opening 7 on the top surface of the furnace body 2, turntables 3 symmetrically rotatably connected to the outer side of the furnace body 2, an electric telescopic rod 4 fixedly installed on the outer side of each turntable 3, a top cover 5 jointly installed at the top of the two electric telescopic rods 4, a sealing seat 12 fixedly installed on the bottom surface of the top cover 5, and the sealing seat 12 is locked in the opening 7, a gear ring 9 is installed on the outer side of one of the turntables 3, a fixed seat 6 is fixedly installed on the outer side of the furnace body 2, a first motor 11 is fixedly installed on the outer side of the fixed seat 6, a drive gear 10 is installed on the output shaft of the first motor 11, and the drive gear 10 meshes with the gear ring 9;

[0023] With the above-mentioned device, the opening 7 can be quickly opened or closed by the cooperation of the first motor 11 and the electric telescopic rod 4. Compared with the traditional method of closing the furnace body 2 by multiple buckles, the operation is more convenient. It should be noted that the furnace body 2 is a microwave sintering furnace.

[0024] A movable seat 14 is slidably connected inside the furnace body 2. The furnace body 2 drives the movable seat 14 to slide up and down through a moving mechanism. Two fixed plates 22 are symmetrically installed on the top surface of the movable seat 14. The two fixed plates 22 are rotatably connected to a rotating seat 23. A clamping mechanism is installed on the top surface of the rotating seat 23. The furnace body 2 drives the rotating seat 23 to rotate through the rotating mechanism. The clamping mechanism clamps and fixes the silicon nitride block. The moving mechanism cooperates with the rotating mechanism to make the clamped silicon nitride slide up and down while rotating, thereby reducing the problem of uneven microwave energy absorption.

[0025] Furthermore, the rotating mechanism includes a rack 19, which is fixedly installed on the bottom wall of the furnace body 2. A driven gear 20 is rotatably connected to the outer side of one of the fixed plates 22, and the driven gear 20 meshes with the rack 19. The driven gear 20 is coaxially connected to the rotating seat 23. The driven gear 20 is driven to rotate by the rack 19, thereby driving the rotating seat 23 to rotate.

[0026] Furthermore, the moving mechanism includes multiple guide rails 13, which are symmetrically installed on the bottom wall of the furnace body 2. Each guide rail 13 is slidably connected to the moving seat 14. Multiple assembly plates 15 are symmetrically installed on the top surface of the furnace body 2. Each pair of corresponding assembly plates 15 are rotatably connected to a rotating shaft 16. Multiple high-temperature alloy wires 18 are symmetrically wound on the outer side of each rotating shaft 16. The other end of each high-temperature alloy wire 18 is fixedly connected to the top surface of the moving seat 14. A second motor 17 is fixedly installed on the outer side of the multiple assembly plates 15. The output shaft of each second motor 17 is coaxially connected to the rotating shaft 16 corresponding to the position.

[0027] Furthermore, the clamping mechanism includes two L-shaped plates 24, which are symmetrically mounted on the top surface of the rotating seat 23. Each L-shaped plate 24 has two screws 26 symmetrically threadedly connected to its top surface. Each rotating seat 23 has a pressure plate 25 slidably connected to its outer side, and the bottom end of each screw 26 is rotatably connected to the pressure plate 25 corresponding to its position.

[0028] Furthermore, a protective shell 8 is fixedly installed on the top surface of the furnace body 2, and each assembly plate 15 and rotating shaft 16 are located inside the protective shell 8.

[0029] Furthermore, multiple T-shaped blocks 21 are symmetrically installed on the outer side of the movable seat 14, and each T-shaped block 21 is slidably connected to the guide rail 13 corresponding to the position, and the bottom end of each high-temperature alloy wire 18 is fixedly installed on the top surface of the corresponding T-shaped block 21.

[0030] This utility model provides a high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace. The specific working principle is as follows: When performing microwave sintering, the silicon nitride billet is first placed on the top surface of the rotating seat 23. The pressure plate 25 is adjusted by rotating the screw 26 so that it moves down along the L-shaped plate 24 to firmly clamp the billet.

[0031] Then the first motor 11 is started, and its drive gear 10 meshes with the gear ring 9 to drive the turntable 3 to rotate, so that the top cover 5 rotates to be directly above the opening 7 of the furnace body 2. The electric telescopic rod 4 extends and pushes the top cover down, and the sealing seat 12 is embedded in the opening 7 to achieve a seal.

[0032] After sintering begins, the second motor 17 drives the rotating shaft 16 to rotate, winding or releasing the high-temperature alloy wire 18, and pulling the moving seat 14 to slide up and down along the guide rail 13. At the same time, during the movement of the moving seat 14, the driven gear 20 on the outside of the fixed plate 22 meshes with the rack 19 on the furnace bottom wall, driving the rotating seat 23 to rotate synchronously, so that the billet absorbs microwave energy evenly during the up and down movement and rotation.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace, comprising a base (1), characterized in that, A furnace body (2) is fixedly installed on the top surface of the base (1). An opening (7) is provided on the top surface of the furnace body (2). Turntables (3) are symmetrically connected to the outer side of the furnace body (2). An electric telescopic rod (4) is fixedly installed on the outer side of each turntable (3). A top cover (5) is installed on the top of the two electric telescopic rods (4). A sealing seat (12) is fixedly installed on the bottom surface of the top cover (5), and the sealing seat (12) is locked in the opening (7). A toothed ring (9) is installed on the outer side of one of the turntables (3). A fixing seat (6) is fixedly installed on the outer side of the furnace body (2). A first motor (11) is fixedly installed on the outside of the furnace body (2). A drive gear (10) is installed on the output shaft of the first motor (11), and the drive gear (10) meshes with the gear ring (9). A movable seat (14) is slidably connected inside the furnace body (2). The furnace body (2) drives the movable seat (14) to slide up and down through the moving mechanism. Two fixed plates (22) are symmetrically installed on the top surface of the movable seat (14). The two fixed plates (22) are rotatably connected to a rotating seat (23). A clamping mechanism is installed on the top surface of the rotating seat (23). The furnace body (2) drives the rotating seat (23) to rotate through the rotating mechanism.

2. The high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace according to claim 1, characterized in that, The rotating mechanism includes a rack (19), which is fixedly installed on the bottom wall of the furnace body (2). A driven gear (20) is rotatably connected to the outside of one of the fixed plates (22), and the driven gear (20) meshes with the rack (19). The driven gear (20) is coaxially connected with the rotating seat (23).

3. The high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace according to claim 2, characterized in that, The moving mechanism includes multiple guide rails (13), and the multiple guide rails (13) are symmetrically installed on the bottom wall of the furnace body (2), and each guide rail (13) is slidably connected to the moving seat (14). Multiple assembly plates (15) are symmetrically installed on the top surface of the furnace body (2). Each pair of corresponding assembly plates (15) are rotatably connected to a rotating shaft (16). Multiple high-temperature alloy wires (18) are symmetrically wound on the outer side of each rotating shaft (16), and the other end of each high-temperature alloy wire (18) is fixedly connected to the top surface of the moving seat (14). A second motor (17) is fixedly installed on the outer side of the multiple assembly plates (15), and the output shaft of each second motor (17) is coaxially connected to the rotating shaft (16) corresponding to the position.

4. The high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace according to claim 3, characterized in that, The clamping mechanism includes two L-shaped plates (24), which are symmetrically mounted on the top surface of the rotating seat (23). Each L-shaped plate (24) has two screws (26) symmetrically threaded on its top surface. Each rotating seat (23) has a pressure plate (25) slidably connected to its outer side. The bottom end of each screw (26) is rotatably connected to the pressure plate (25) corresponding to its position.

5. The high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace according to claim 4, characterized in that, The top surface of the furnace body (2) is fixedly equipped with a protective shell (8), and each assembly plate (15) and rotating shaft (16) are located inside the protective shell (8).

6. The high-efficiency microwave coupling device for a silicon nitride microwave sintering furnace according to claim 5, characterized in that, Multiple T-shaped blocks (21) are symmetrically installed on the outer side of the movable seat (14), and each T-shaped block (21) is slidably connected to the guide rail (13) corresponding to the position, and the bottom end of each high-temperature alloy wire (18) is fixedly installed on the top surface of the corresponding T-shaped block (21).

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