Hot-pressed silicon nitride ceramic electric heating element

Abstract

The utility model relates to the technical field of electric heating elements, in particular to a hot-pressed silicon nitride ceramic electric heating element, which comprises two silicon nitride ceramic substrates arranged up and down, an electrode block and a heating tube, a tube groove is formed between the two silicon nitride ceramic substrates, the heating tube is placed in the tube groove, and the electrode block is arranged in the tube groove. A through groove is formed in the position, located at the front end of the pipe groove, between the two silicon nitride ceramic substrates, a power connection sleeve base is fixedly connected to the end of the heating pipe, the power connection sleeve base is placed in the through groove, a power connection column fixedly penetrates through the end of the electrode block, and the rear end of the power connection column is sleeved with the power connection sleeve base in a sliding mode; the rear end face of the electrode block is provided with an assembling groove, and the assembling groove is sleeved on the outer sides of the front ends of the two silicon nitride ceramic substrates in a sliding mode, so that the two silicon nitride ceramic substrates and the electrode block are convenient to disassemble, a damaged heating tube can be conveniently and independently replaced, and the later use and maintenance cost of the electric heating element can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating elements, in particular to a hot pressed silicon nitride ceramic electric heating element. Background Art

[0002] Electric heating elements are a type of element that realizes the conversion of electrical energy into thermal energy. Various electric heating equipment must use electric heating elements to generate heat. There are many categories of electric heating element products. Conventional varieties include electric heating plates, electric heating belts, electric heating cables, electric heating discs, electric thermocouples, electric heating coils, electric heating rods, electric heating cores, silicon nitride ceramic electric heating elements, tungsten-molybdenum products and silicon carbon rods, etc. Among them, the silicon nitride ceramic electric heating element mainly includes a silicon nitride ceramic substrate and a heating tube embedded in the silicon nitride ceramic substrate. Since the silicon nitride ceramic substrate and the electrode block are usually hot-pressed and fixedly connected, it is difficult to separate the silicon nitride ceramic substrate and the electrode block. If the heating tube in the silicon nitride ceramic substrate is damaged, the electric heating element needs to be replaced as a whole, which increases the later use and maintenance costs of the electric heating element. Therefore, we propose a hot-pressed silicon nitride ceramic electric heating element. Utility Model Content

[0003] The utility model aims to provide a hot pressed silicon nitride ceramic electric heating element to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A hot-pressed silicon nitride ceramic electric heating element comprises two silicon nitride ceramic substrates, an electrode block and a heating tube arranged in an upper and lower manner, a tube groove is formed between the two silicon nitride ceramic substrates, the heating tube is placed in the tube groove, a through groove is formed between the two silicon nitride ceramic substrates at the front end of the tube groove, the end of the heating tube is fixedly connected with an electric connection socket, the electric connection socket is placed in the through groove, an electric connection column is fixedly penetrated at the end of the electrode block, the electric connection socket is slidably sleeved on the rear end outer side of the electric connection column, an assembly groove is provided on the rear end surface of the electrode block, the assembly groove is slidably sleeved on the front end outer side of the two silicon nitride ceramic substrates, a positioning protrusion is hot-pressed and connected to the silicon nitride ceramic substrate, a positioning groove is provided inside the assembly groove, the positioning protrusion is inserted into the positioning groove, a fastening screw groove is provided on the surface of the positioning protrusion, and screw assemblies are threadedly connected to the upper and lower ends of the electrode block, and the screw assembly is adapted to the fastening screw groove.

[0006] Preferably, the front end of the power connection post is fixedly connected to a conductive seat, and the front end of the conductive seat is fixedly connected to a conductive connector.

[0007] Preferably, the cross-sectional shape of the positioning protrusion is rectangular, and the rear end surface of the positioning protrusion is flush with the rear end surface of the electrode block.

[0008] Preferably, the screw assembly consists of two round head screws, and the two round head screws are symmetrically distributed.

[0009] Preferably, two grooves are symmetrically formed on the upper and lower end surfaces of the electrode block, and the end caps of the round head screws are located in the grooves.

[0010] Preferably, the cross-sectional shape of the groove is circular, and the side surface of the end cap portion of the round head screw contacts the inner side surface of the groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model places the heating tube in the tube groove, places the power connection sleeve in the through groove, and the assembly groove on the electrode block is sleeved on the front outer side of the two silicon nitride ceramic substrates, so that the positioning protrusion connected to the silicon nitride ceramic substrate by heat pressing is inserted into the positioning groove, the power connection sleeve is sleeved on the rear outer side of the power connection column, and the screw assembly on the electrode block is threadedly connected to the fastening screw groove on the positioning protrusion, replacing the traditional hot pressing fixing method, so that the two silicon nitride ceramic substrates and the electrode block are easy to disassemble. If the heating tube in the silicon nitride ceramic substrate is damaged and needs to be replaced, it is convenient to replace the damaged heating tube separately without replacing the electric heating element as a whole, which is beneficial to reducing the later use and maintenance costs of the electric heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of a hot-pressed silicon nitride ceramic electric heating element of the utility model;

[0014] Figure 2 This is a schematic cross-sectional view of a hot-pressed silicon nitride ceramic electric heating element of the utility model;

[0015] Figure 3 It is a schematic diagram of the exploded structure of two silicon nitride ceramic substrates and a heating tube in a hot-pressed silicon nitride ceramic electric heating element of the utility model;

[0016] Figure 4 The utility model is a three-dimensional structural schematic diagram of an electrode block in a hot-pressed silicon nitride ceramic electric heating element.

[0017] In the figure: 1, silicon nitride ceramic substrate; 101, tube groove; 102, through groove; 2, electrode block; 201, power connection post; 202, conductive seat; 203, conductive joint; 204, groove; 3, assembly groove; 4, positioning groove; 5, positioning protrusion; 501, fastening screw groove; 6, screw assembly; 7, heating tube; 701, power connection socket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0020] A hot-pressed silicon nitride ceramic electric heating element comprises two silicon nitride ceramic substrates 1, an electrode block 2 and a heating tube 7 arranged in an upper and lower manner, a tube groove 101 is formed between the two silicon nitride ceramic substrates 1, the heating tube 7 is placed in the tube groove 101, a through groove 102 is formed at the front end of the tube groove 101 between the two silicon nitride ceramic substrates 1, an electric connection socket 701 is fixedly connected to the end of the heating tube 7, the electric connection socket 701 is placed in the through groove 102, an electric connection column 201 is fixedly penetrated at the end of the electrode block 2, the electric connection socket 701 is slidably sleeved on the rear end outer side of the electric connection column 201, and the electrode block 2 is provided with a plurality of electric connection sockets 701, wherein the electric connection socket 701 is provided at the rear end outer side of the electric connection socket 201, and the electric connection socket 701 is provided at the rear end outer side of the electric connection socket 201. An assembly groove 3 is provided on the rear end surface, and the assembly groove 3 is slidably sleeved on the outer side of the front ends of the two silicon nitride ceramic substrates 1. A positioning protrusion 5 is hot-pressed and connected to the silicon nitride ceramic substrate 1. A positioning groove 4 is provided inside the assembly groove 3, and the positioning protrusion 5 is inserted into the positioning groove 4. A fastening screw groove 501 is provided on the surface of the positioning protrusion 5. The upper and lower ends of the electrode block 2 are both threadedly connected with a screw assembly 6, and the screw assembly 6 is adapted to the fastening screw groove 501, so that the screw assembly 6 cooperates with the threaded connection to the fastening screw groove 501 on the positioning protrusion 5, and the two silicon nitride ceramic substrates 1 and the electrode block 2 can be fastened and installed.

[0021] As a preferred implementation in this embodiment, Figure 2 As shown, the front end of the power connection post 201 is fixedly connected to a conductive base 202, and the front end of the conductive base 202 is fixedly connected to a conductive connector 203, so that the conductive connector 203 can be connected and energized.

[0022] As a preferred implementation in this embodiment, Figure 1 and Figure 3 As shown, the cross-sectional shape of the positioning protrusion 5 is a rectangle, and the rear end surface of the positioning protrusion 5 is flush with the rear end surface of the electrode block 2, thereby achieving the purpose of ensuring the overall appearance of the electric heating element.

[0023] As a preferred implementation in this embodiment, Figure 1 and Figure 4As shown, the screw assembly 6 is composed of two round head screws, which are symmetrically distributed. Two grooves 204 are symmetrically provided on the upper and lower end surfaces of the electrode block 2, and the end caps of the round head screws are located in the grooves 204. The cross-sectional shape of the groove 204 is circular, and the side of the end cap of the round head screw contacts the inner side of the groove 204, thereby achieving the purpose of ensuring the sealing between the round head screw and the electrode block 2.

[0024] Working principle:

[0025] By placing the heating tube 7 in the tube groove 101, placing the power socket 701 in the through groove 102, and sleeved on the outer front end of the two silicon nitride ceramic substrates 1, the positioning protrusion 5 hot-pressed and connected to the silicon nitride ceramic substrate 1 is inserted into the positioning groove 4, and the power socket 701 is sleeved on the outer rear end of the power post 201. The screw assembly 6 on the electrode block 2 is threadedly connected to the fastening screw groove 501 on the positioning protrusion 5, so that the two silicon nitride ceramic substrates 1 and the electrode block 2 can be fastened and installed. If the heating tube 7 in the silicon nitride ceramic substrate 1 is damaged and needs to be replaced, loosen the screw assembly 6 on the electrode block 2 so that the screw assembly 6 is disengaged from the fastening screw groove 501 on the positioning protrusion 5, and the silicon nitride ceramic substrate 1 is pulled out along the assembly groove 3 on the electrode block 2, so that the silicon nitride ceramic substrate 1 and the electrode block 2 can be completely separated, so that it is convenient to replace the damaged heating tube 7 separately.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hot-pressed silicon nitride ceramic electric heating element, comprising two silicon nitride ceramic substrates (1), an electrode block (2) and a heating tube (7) arranged in an upper and lower manner, a tube groove (101) is formed between the two silicon nitride ceramic substrates (1), and the heating tube (7) is placed in the tube groove (101), characterized in that: A through groove (102) is formed between the two silicon nitride ceramic substrates (1) at the front end of the tube groove (101); the end of the heating tube (7) is fixedly connected to a power connection socket (701); the power connection socket (701) is placed in the through groove (102); the end of the electrode block (2) is fixedly penetrated by a power connection post (201); the power connection socket (701) is slidably sleeved on the rear end outside of the power connection post (201); the rear end surface of the electrode block (2) is provided with an assembly groove (3); the assembly The groove (3) is slidably sleeved on the outer sides of the front ends of the two silicon nitride ceramic substrates (1); a positioning protrusion (5) is hot-pressed and connected to the silicon nitride ceramic substrate (1); a positioning groove (4) is provided inside the assembly groove (3); the positioning protrusion (5) is inserted into the positioning groove (4); a fastening screw groove (501) is provided on the surface of the positioning protrusion (5); and screw assemblies (6) are threadedly connected to the upper and lower ends of the electrode block (2); the screw assembly (6) is adapted to the fastening screw groove (501).

2. The hot-pressed silicon nitride ceramic electric heating element according to claim 1, characterized in that: The front end of the power connection post (201) is fixedly connected to a conductive seat (202), and the front end of the conductive seat (202) is fixedly connected to a conductive connector (203).

3. The hot-pressed silicon nitride ceramic electric heating element according to claim 1, characterized in that: The cross-sectional shape of the positioning protrusion (5) is rectangular, and the rear end surface of the positioning protrusion (5) is flush with the rear end surface of the electrode block (2).

4. The hot-pressed silicon nitride ceramic electric heating element according to claim 1, characterized in that: The screw assembly (6) consists of two round head screws, and the two round head screws are symmetrically distributed.

5. The hot-pressed silicon nitride ceramic electric heating element according to claim 4, characterized in that: Two grooves (204) are symmetrically provided on the upper and lower end surfaces of the electrode block (2), and the end caps of the round head screws are located in the grooves (204).

6. The hot-pressed silicon nitride ceramic electric heating element according to claim 5, characterized in that: The cross-sectional shape of the groove (204) is circular, and the side surface of the end cap of the round head screw contacts the inner side surface of the groove (204).

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