A bending-resistant silicon nitride ceramic heating element

Abstract

This utility model relates to a bending-resistant silicon nitride ceramic heating element, comprising: a ceramic substrate and an electrode block. A heating tube is fixedly connected to the inner cavity of the ceramic substrate, and a first conductive block is fixedly connected to both ends of the heating tube. The right side of the ceramic substrate is movably inserted into the inner cavity of the electrode block. Two connecting wires are fixedly inserted into the right side of the electrode block, and a second conductive block is fixedly connected to the left end of the connecting wires. Two fixing plates are fixedly connected to the right side of the ceramic substrate, and a connecting groove is formed on the right side of the fixing plates. Movable plates are provided on both the front and rear sides of the inner cavity of the electrode block, and a connecting block is fixedly connected to the left side of the movable plates. The beneficial effect of this utility model is that the elastic conductive sheet deforms, and the elastic conductive sheet fits tightly with the inner walls of the first and second limiting grooves respectively, avoiding poor contact between the first and second conductive blocks, which would prevent the heating element from failing to work.

Description

Technical Field

[0001] This utility model relates to the field of heating element technology, specifically to a bending-resistant silicon nitride ceramic heating element. Background Technology

[0002] Silicon nitride ceramic is an inorganic ceramic material that does not shrink during sintering. Silicon nitride has high strength, especially hot-pressed silicon nitride. Based on its material properties, hot-pressed silicon nitride ceramic is an excellent high-temperature engineering material and has a wide range of applications in high-temperature fields.

[0003] In the prior art, Chinese Patent Publication No. CN222655352U discloses a hot-pressed silicon nitride ceramic heating element, including two silicon nitride ceramic substrates arranged vertically, an electrode block, and a heating tube. A groove is formed between the two silicon nitride ceramic substrates, and the heating tube is placed in the groove. A through groove is formed at the front end of the groove between the two silicon nitride ceramic substrates. A power receiving sleeve is fixedly connected to the end of the heating tube and placed in the through groove. A power receiving post is fixedly passed through the end of the electrode block. The power receiving sleeve is slidably sleeved on the outer rear end of the power receiving post. An assembly groove is opened on the rear end face of the electrode block and is slidably sleeved on the outer front end of the two silicon nitride ceramic substrates. This makes it easy to separate the two silicon nitride ceramic substrates from the electrode block, facilitates the individual replacement of the damaged heating tube, and helps to reduce the later use and maintenance costs of the heating element. However, in actual use, after the electrode block is assembled with the two silicon nitride ceramic substrates, the power connection sleeve is simply fitted onto the outside of the power connection post. This connection method can easily lead to poor contact between the power connection sleeve and the power connection post, thus causing the heating element to fail to work. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application proposes a bending-resistant silicon nitride ceramic heating element in which the elastic conductive sheet deforms and fits tightly against the inner walls of the first and second limiting grooves, thereby preventing poor contact between the first and second conductive blocks that could cause the heating element to malfunction.

[0005] This utility model provides the following technical solution: a bending-resistant silicon nitride ceramic heating element, comprising: a ceramic substrate and an electrode block; a heating tube is fixedly connected to the inner cavity of the ceramic substrate; a first conductive block is fixedly connected to both ends of the heating tube; the right side of the ceramic substrate is movably inserted into the inner cavity of the electrode block; two connecting wires are fixedly inserted into the right side of the electrode block; a second conductive block is fixedly connected to the left end of the connecting wires; two fixing plates are fixedly connected to the right side of the ceramic substrate; a connecting groove is opened on the right side of the fixing plates; movable plates are provided on both the front and rear sides of the inner cavity of the electrode block; a connecting block is fixedly connected to the left side of the movable plates; an insulating rod is fixedly connected to the side of the movable plates near the center of the electrode block; an elastic conductive sheet is fixedly connected to the end of the insulating rod away from the movable plates; screw holes are opened on both the movable plates and the insulating rod; circular grooves are opened on both the front and rear sides of the electrode block; screws are rotatably connected to the inner cavity of the circular grooves.

[0006] As a preferred embodiment of this utility model, a fixing frame is fixedly connected to both the top and bottom of the ceramic substrate. Several reinforcing ribs are fixedly connected to the inner cavity of the fixing frame. The reinforcing ribs are fixedly connected to the ceramic substrate and are arranged in a crisscross pattern.

[0007] As a preferred embodiment of this utility model, the two fixing plates are respectively close to the front and rear sides of the ceramic substrate, and the two fixing plates are arranged symmetrically about the central axis of the ceramic substrate.

[0008] As a preferred embodiment of this utility model, each of the first conductive block and the second conductive block has an inclined surface on one side. A first limiting groove is formed on the inclined surface of the first conductive block, and a second limiting groove is formed on the inclined surface of the second conductive block. Both the first limiting groove and the second limiting groove are matched with the elastic conductive sheet.

[0009] As a preferred embodiment of this utility model, the cross-section of the connecting block is an isosceles trapezoid, and the connecting block and the connecting groove are matched with each other.

[0010] As a preferred embodiment of this utility model, a limiting post is fixedly connected to the side of the movable plate away from the insulating rod, and the limiting post is close to the right side wall of the movable plate. Limiting holes are opened on both the front and rear sides of the inner cavity of the electrode block, and the limiting post is movably inserted into the inner cavity of the adjacent limiting hole.

[0011] As a preferred embodiment of this utility model, the nut portion of the screw matches the circular groove, the screw is inserted into the inner cavity of the screw hole, and the screw is threadedly connected to the screw hole.

[0012] The beneficial effects of this utility model are: 1. In this utility model, when assembling the ceramic substrate and the electrode block, it is only necessary to first move the ceramic substrate into the inner cavity of the electrode block, and then tighten the screw so that the movable plate drives the connecting block and the elastic conductive sheet. The connecting block moves into the inner cavity of the connecting groove to complete the assembly of the ceramic substrate and the electrode block. Continue to tighten the screw, and the connecting block continues to move in the inner cavity of the connecting groove, while the elastic conductive sheet deforms. The elastic conductive sheet is tightly attached to the inner wall of the first limiting groove and the second limiting groove respectively, so as to avoid poor contact between the first conductive block and the second conductive block, which would cause the heating element to fail to work. 2. In this utility model, by setting the first limiting groove and the second limiting groove, the elastic conductive sheet can be limited, so that the deformed elastic conductive sheet can be firmly and tightly attached to the first conductive block and the second conductive block, and the stability is higher. Attached Figure Description

[0013] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a front sectional perspective view of the electrode block of this utility model component; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a front perspective view of the reinforcing rib of the component of this utility model; Figure 5 This is a frontal sectional perspective view of the ceramic substrate of the component of this utility model; Figure 6 This is a front perspective view of the fixing plate of the component of this utility model; Figure 7 This is a front perspective view of the movable plate of the component of this utility model; Figure 8 This is a front perspective view of the first conductive block and the second conductive block of the present invention. In the diagram: 1. Ceramic substrate; 2. Fixing frame; 3. Reinforcing rib; 4. Heating element; 5. First conductive block; 6. Fixing plate; 7. Connecting groove; 8. Electrode block; 9. Connecting wire; 10. Second conductive block; 11. First limiting groove; 12. Second limiting groove; 13. Connecting block; 14. Movable plate; 15. Insulating rod; 16. Elastic conductive sheet; 17. Screw hole; 18. Screw; 19. Circular groove; 20. Limiting post; 21. Limiting hole. Detailed Implementation

[0014] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] Example 1 like Figures 1 to 7 As shown, a bending-resistant silicon nitride ceramic heating element includes: a ceramic substrate 1 and an electrode block 8. A fixing frame 2 is fixedly connected to the top and bottom of the ceramic substrate 1. Several reinforcing ribs 3 are fixedly connected to the inner cavity of the fixing frame 2. The reinforcing ribs 3 are fixedly connected to the ceramic substrate 1. The several reinforcing ribs 3 are arranged in a cross pattern. Through the arrangement of the fixing frame 2 and the reinforcing ribs 3, the moment of inertia of the ceramic substrate 1 is greatly increased. The ceramic substrate 1, the fixing frame 2 and the reinforcing ribs 3 form a high-strength skeleton, which can effectively distribute the load and constrain the deformation of the ceramic substrate 1, prevent local instability, and greatly improve the bending resistance of the ceramic substrate 1. A heating tube 4 is fixedly connected to the inner cavity of the ceramic substrate 1. A first conductive block 5 is fixedly connected to both ends of the heating tube 4. The right side of the ceramic substrate 1 is movably inserted into the inner cavity of the electrode block 8. Two connecting wires 9 are fixedly inserted into the right side of the electrode block 8. A second conductive block 10 is fixedly connected to the left end of the connecting wires 9.

[0016] In this embodiment, two fixing plates 6 are fixedly connected to the right side of the ceramic substrate 1. The two fixing plates 6 are respectively close to the front and rear sides of the ceramic substrate 1. The two fixing plates 6 are arranged symmetrically about the central axis of the ceramic substrate 1. A connecting groove 7 is opened on the right side of the fixing plate 6. Movable plates 14 are provided on both the front and rear sides of the inner cavity of the electrode block 8. A connecting block 13 is fixedly connected to the left side of the movable plate 14. The cross-section of the connecting block 13 is an isosceles trapezoid. The connecting block 13 matches the connecting groove 7. An insulating rod 15 is fixedly connected to the side of the movable plate 14 closest to the center of the electrode block 8. An insulating rod 15 is fixedly connected to the side of the movable plate 14 away from the insulating rod 15. A limiting post 20 is fixedly connected, and the limiting post 20 is close to the right side wall of the movable plate 14. Limiting holes 21 are opened on both the front and rear sides of the inner cavity of the electrode block 8. The limiting post 20 is movably inserted into the inner cavity of the adjacent limiting hole 21. An elastic conductive sheet 16 is fixedly connected to the end of the insulating rod 15 away from the movable plate 14. Screw holes 17 are opened on both the movable plate 14 and the insulating rod 15. Circular grooves 19 are opened on both the front and rear sides of the electrode block 8. Screws 18 are rotatably connected to the inner cavity of the circular grooves 19. The nut part of the screw 18 matches the circular groove 19. The screw 18 is inserted into the inner cavity of the screw hole 17 and is threadedly connected to the screw hole 17.

[0017] When assembling the ceramic substrate 1 and the electrode block 8, the ceramic substrate 1 is moved into the inner cavity of the electrode block 8, and then the screw 18 is turned by an external tool, an Allen wrench. The screw 18 rotates in the inner cavity of the screw hole 17, and the movable plate 14 and the insulating rod 15 move under the action of the thread. The movable plate 14 drives the connecting block 13 and the limiting post 20 to move. The connecting block 13 moves towards the connecting groove 7, and the insulating rod 15 drives the elastic conductive sheet 16 to move towards the first conductive block 5 and the second conductive block 10. The connecting block 13 moves into the inner cavity of the connecting groove 7, thus completing the assembly of the ceramic substrate 1 and the electrode block 8.

[0018] When disassembling the ceramic substrate 1, simply rotate the screw 18 in the opposite direction. The movable plate 14 will move the connecting block 13, the elastic conductive sheet 16, and the limiting post 20. The connecting block 13 will move away from the connecting groove 7, and the elastic conductive sheet 16 will move away from the first limiting groove 11 and the second limiting groove 12. Then, the ceramic substrate 1 will be moved away from the electrode block 8, thus completing the disassembly of the ceramic substrate 1.

[0019] Example 2 like Figure 3 and Figure 8 As shown, the first conductive block 5 and the second conductive block 10 each have a slope on their corresponding sides. The first conductive block 5 has a first limiting groove 11 on its slope, and the second conductive block 10 has a second limiting groove 12 on its slope. The first limiting groove 11 and the second limiting groove 12 are matched with the elastic conductive sheet 16.

[0020] The elastic conductive sheet 16 moves until it is in contact with the inner cavity of the first limiting groove 11 and the second limiting groove 12. Then, the screw 18 is turned and the connecting block 13 continues to move in the inner cavity of the connecting groove 7. The elastic conductive sheet 16 is deformed and is tightly in contact with the inner wall of the first limiting groove 11 and the second limiting groove 12 respectively. This avoids poor contact between the first conductive block 5 and the second conductive block 10, which would cause the heating element to fail to work. By setting the first limiting groove 11 and the second limiting groove 12, the elastic conductive sheet 16 can be limited, so that the deformed elastic conductive sheet 16 can be firmly and tightly in contact with the first conductive block 5 and the second conductive block 10, resulting in higher stability.

[0021] Implementation Plan: During use, when assembling the ceramic substrate 1 and the electrode block 8, the ceramic substrate 1 is moved into the inner cavity of the electrode block 8. Then, using an external tool such as an Allen wrench, the screw 18 is turned. The screw 18 rotates in the inner cavity of the screw hole 17, and the movable plate 14 and the insulating rod 15 move under the action of the threads. The movable plate 14 drives the connecting block 13 and the limiting post 20 to move. The connecting block 13 moves towards the connecting groove 7, and the insulating rod 15 drives the elastic conductive sheet 16 towards the first conductive block 5 and the second conductive block 10. The connecting block 13 moves to the connecting groove 7. The inner cavity of the connecting groove 7 is used to complete the assembly of the ceramic substrate 1 and the electrode block 8. The elastic conductive sheet 16 moves to fit with the inner cavity of the first limiting groove 11 and the second limiting groove 12. Then, the screw 18 is tightened, and the connecting block 13 continues to move in the inner cavity of the connecting groove 7. The elastic conductive sheet 16 deforms and fits tightly with the inner wall of the first limiting groove 11 and the second limiting groove 12 respectively, so as to avoid poor contact between the first conductive block 5 and the second conductive block 10, which would cause the heating element to fail to work. An external power supply can be connected through two sets of connecting wires 9 for power supply.

[0022] When disassembling the ceramic substrate 1, simply rotate the screw 18 in the opposite direction. The movable plate 14 will move the connecting block 13, the elastic conductive sheet 16, and the limiting post 20. The connecting block 13 will move away from the connecting groove 7, and the elastic conductive sheet 16 will move away from the first limiting groove 11 and the second limiting groove 12. Then, the ceramic substrate 1 will be moved away from the electrode block 8, thus completing the disassembly of the ceramic substrate 1.

[0023] When assembling the ceramic substrate 1 and the electrode block 8, the ceramic substrate 1 is first moved into the inner cavity of the electrode block 8. Then, the screw 18 is turned so that the movable plate 14 moves the connecting block 13 and the elastic conductive sheet 16. The connecting block 13 moves into the inner cavity of the connecting groove 7 to complete the assembly of the ceramic substrate 1 and the electrode block 8. The screw 18 is turned again, and the connecting block 13 continues to move in the inner cavity of the connecting groove 7. The elastic conductive sheet 16 is deformed and tightly fits against the inner walls of the first limiting groove 11 and the second limiting groove 12, respectively, to avoid poor contact between the first conductive block 5 and the second conductive block 10, which would cause the heating element to fail to work.

[0024] By setting the first limiting groove 11 and the second limiting groove 12, the elastic conductive sheet 16 can be limited, so that the deformed elastic conductive sheet 16 can be firmly and tightly attached to the first conductive block 5 and the second conductive block 10, resulting in higher stability.

[0025] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A bend-resistant silicon nitride ceramic heating element, characterized by, include: The ceramic substrate and electrode block are assembled. A heating element is fixedly connected to the inner cavity of the ceramic substrate. Both ends of the heating element are fixedly connected to a first conductive block. The right side of the ceramic substrate is movably inserted into the inner cavity of the electrode block. Two connecting wires are fixedly inserted into the right side of the electrode block. The left end of the connecting wires is fixedly connected to a second conductive block. Two fixing plates are fixedly connected to the right side of the ceramic substrate. A connecting groove is opened on the right side of the fixing plates. Movable plates are provided on both the front and rear sides of the inner cavity of the electrode block. A connecting block is fixedly connected to the left side of the movable plates. An insulating rod is fixedly connected to the side of the movable plate near the center of the electrode block. An elastic conductive sheet is fixedly connected to the end of the insulating rod away from the movable plate. Screw holes are opened on both the movable plates and the insulating rod. Circular grooves are opened on both the front and rear sides of the electrode block. Screws are rotatably connected to the inner cavity of the circular grooves.

2. The anti-buckling silicon nitride ceramic heating element according to claim 1, wherein The top and bottom of the ceramic substrate are fixedly connected to a fixing frame. The inner cavity of the fixing frame is fixedly connected to several reinforcing ribs, which are fixedly connected to the ceramic substrate. The reinforcing ribs are arranged in a crisscross pattern.

3. The anti-buckling silicon nitride ceramic heating element according to claim 1, wherein, The two fixing plates are located near the front and rear sides of the ceramic substrate, respectively, and are arranged symmetrically about the central axis of the ceramic substrate.

4. The anti-buckling silicon nitride ceramic heating element according to claim 1, wherein The first conductive block and the second conductive block each have a slope on one side corresponding to each other. The first conductive block has a first limiting groove on its slope, and the second conductive block has a second limiting groove on its slope. Both the first limiting groove and the second limiting groove are matched with the elastic conductive sheet.

5. The flexible-free silicon nitride ceramic heating element according to claim 1, wherein The cross-section of the connecting block is an isosceles trapezoid, and the connecting block and the connecting groove are matched.

6. The flexible-free silicon nitride ceramic heating element according to claim 1, wherein A limiting post is fixedly connected to the side of the movable plate away from the insulating rod, and the limiting post is close to the right side wall of the movable plate. Limiting holes are opened on both the front and rear sides of the inner cavity of the electrode block, and the limiting post is movably inserted into the inner cavity of the adjacent limiting hole.

7. The flexible-free silicon nitride ceramic heating element according to claim 1, wherein The nut portion of the screw matches the circular groove, the screw is inserted into the inner cavity of the screw hole, and the screw is threadedly connected to the screw hole.

Images