Ignition rod

Abstract

The utility model discloses an ignition rod, and relates to the technical field of ignition rods. The ignition rod comprises a combustion furnace, a sleeve is fixedly connected to the outer surface of the combustion furnace, an ignition rod assembly is arranged in the sleeve, a ceramic plug is fixedly connected to the inner surface of the sleeve, the ignition rod assembly comprises a silicon nitride heating body, a heating tungsten filament is arranged in the silicon nitride heating body, and a ceramic flange is fixedly connected to the outer surface of the silicon nitride heating body. A stainless steel sheet is arranged on the outer surface of the ceramic flange, a mounting screw is arranged in a mounting hole in the outer surface of the stainless steel sheet, a lead is arranged at the end of the heating tungsten filament, and a terminal is arranged at the end, away from the heating tungsten filament, of the lead. A positioning pin, a first limiting part and a second limiting part are arranged on the outer surface of the ceramic flange, a positioning groove is formed in the outer surface of the sleeve, through the ignition rod assembly, installation operation is easy and convenient, the installation position of the ignition rod can be guaranteed, and the ignition rod can be conveniently installed in place.

Description

Technical Field

[0001] The utility model relates to the technical field of ignition rods, and specifically relates to an ignition rod. Background Art

[0002] The silicon nitride ignition rod is a high-temperature heating element, which has the advantages of fast heating, high temperature resistance, corrosion resistance, etc. Therefore, it is widely used in high-temperature industrial furnaces, heaters, welding robots and other fields. The structure of the silicon nitride ceramic ignition rod is crucial for the exertion of its functions. During use, the ignition rod generates sparks under high temperature and high pressure by applying voltage, so as to ignite or initiate the substances to be processed. Due to the excellent mechanical properties and chemical stability of silicon nitride ceramics, the ignition rod has high reliability. After long-term use, the ignition rod will be damaged and needs to be replaced in time. However, the existing ignition rods cannot be accurately positioned during installation, resulting in very inconvenient disassembly and assembly, and affecting the use effect of the ignition rod. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an ignition rod to solve the problems presented in the above background art.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: An ignition rod includes a combustion furnace. The outer surface of the combustion furnace is fixedly connected with a sleeve. An ignition rod assembly is arranged inside the sleeve. The inner surface of the sleeve is fixedly connected with a ceramic plug. The ignition rod assembly includes a silicon nitride heating element. A heating tungsten wire is arranged inside the silicon nitride heating element. The outer surface of the silicon nitride heating element is fixedly connected with a ceramic flange. A stainless steel sheet is arranged on the outer surface of the ceramic flange. Mounting screws are arranged in the mounting holes on the outer surface of the stainless steel sheet. A lead wire is arranged at the end of the heating tungsten wire. A terminal is arranged at the end of the lead wire away from the heating tungsten wire. An internal through hole is opened inside the ceramic flange. A positioning pin, a first limiting part and a second limiting part are arranged on the outer surface of the ceramic flange. A positioning groove is arranged on the outer surface of the sleeve. The combustion furnace includes a first furnace body, a second furnace body and a third furnace body. A first communication hole is opened on the outer surface of the first furnace body. Ventilation small holes are opened on the outer surface of the second furnace body. A second communication hole is opened on the outer surface of the third furnace body.

[0005] Preferably, the inside of the sleeve is communicated with the inside of the first furnace body through the first communication hole. The inside of the sleeve is communicated with the inside of the second furnace body through the ventilation small holes. The inside of the sleeve is communicated with the inside of the third furnace body through the second communication hole.

[0006] Preferably, the stainless steel sheet is connected with the sleeve through the mounting screws. The outer surface of the positioning pin is in extrusion fit with the inner surface of the positioning groove.

[0007] Preferably, the outer surface of the first limiting portion is in contact with the end of the sleeve away from the combustion furnace, and the outer surface of the second limiting portion is in contact with the outer surface of the stainless steel sheet.

[0008] Preferably, the outer surface of the silicon nitride heating element is sleeved and adapted to the inside of the ceramic plug, and the outer surface of the lead wire penetrates through the ceramic flange and extends to the outside.

[0009] Preferably, the igniter rod assembly is connected to the sleeve through the stainless steel sheet and the mounting screw, and the end of the ceramic plug is arranged inside the first communication hole. Advantageous Effects

[0010] The present utility model provides an igniter rod. It has the following advantageous effects:

[0011] (1). For this igniter rod, through the cooperation of the igniter rod assembly, the positioning pin and the positioning groove, the installation of the igniter rod can be more accurate, and the igniter rod is not easy to loosen. Then, by using the stainless steel sheet and the mounting screw, the igniter rod assembly is installed on the sleeve. The operation is simple and convenient, easy to disassemble and assemble, and can also ensure the installation position of the igniter rod, so as to facilitate the installation in place.

[0012] (2). For this igniter rod, through the combustion furnace, which includes three structures: the first furnace body, the second furnace body and the third furnace body, the igniter rod has multiple usage modes. When the combustion furnace adopts the structure of the first furnace body, the ceramic plug can be used to avoid dust entering, and at the same time, it can also prevent blockage, facilitating the igniter rod to ignite better. When the combustion furnace adopts the structure of the second furnace body, multiple ventilation holes can be used to make the passing heat higher, and can also block dust, improving the practicability of the device. When the combustion furnace adopts the structure of the third furnace body, only the igniter rod assembly is arranged in the sleeve connected to the third furnace body, so that the igniter rod assembly directly heats the third furnace body. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the present utility model;

[0014] Figure 2 is the second perspective structural schematic diagram of the present utility model as a whole;

[0015] Figure 3 is the structural schematic diagram of the igniter rod assembly of the present utility model;

[0016] Figure 4 is the structural schematic diagram of the first furnace body of the present utility model;

[0017] Figure 5 is the structural schematic diagram of the second furnace body of the present utility model;

[0018] Figure 6This is a schematic structural diagram of the third furnace body of the present utility model.

[0019] In the figure: 1, combustion furnace; 101, first furnace body; 102, second furnace body; 103, first communication hole; 104, ventilation small hole; 105, third furnace body; 106, second communication hole; 2, sleeve; 3, ignition rod assembly; 301, silicon nitride heating element; 302, ceramic flange; 303, heating tungsten wire; 304, lead wire; 305, positioning pin; 306, first limiting part; 307, internally provided through hole; 308, second limiting part; 4, positioning groove; 5, stainless steel sheet; 6, mounting screw; 7, terminal; 8, ceramic plug. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0021] As Figure 1-6 shown, the present utility model provides an ignition rod, including a combustion furnace 1. A sleeve 2 is fixedly connected to the outer surface of the combustion furnace 1. An ignition rod assembly 3 is arranged inside the sleeve 2. A ceramic plug 8 is fixedly connected to the inner surface of the sleeve 2. The ignition rod assembly 3 includes a silicon nitride heating element 301. A heating tungsten wire 303 is arranged inside the silicon nitride heating element 301. A ceramic flange 302 is fixedly connected to the outer surface of the silicon nitride heating element 301. A stainless steel sheet 5 is arranged on the outer surface of the ceramic flange 302. Mounting screws 6 are arranged in the mounting holes on the outer surface of the stainless steel sheet 5. A lead wire 304 is arranged at the end of the heating tungsten wire 303. A terminal 7 is arranged at one end of the lead wire 304 away from the heating tungsten wire 303. An internally provided through hole 307 is opened inside the ceramic flange 302. A positioning pin 305, a first limiting part 306 and a second limiting part 308 are arranged on the outer surface of the ceramic flange 302. A positioning groove 4 is arranged on the outer surface of the sleeve 2. The combustion furnace 1 includes a first furnace body 101, a second furnace body 102 and a third furnace body 105. A first communication hole 103 is opened on the outer surface of the first furnace body 101. A ventilation small hole 104 is opened on the outer surface of the second furnace body 102. A second communication hole 106 is opened on the outer surface of the third furnace body 105.

[0022] Specifically, the inside of the sleeve 2 is communicated with the inside of the first furnace body 101 through the first communication hole 103. The inside of the sleeve 2 is communicated with the inside of the second furnace body 102 through the ventilation small hole 104. The inside of the sleeve 2 is communicated with the inside of the third furnace body 105 through the second communication hole 106.

[0023] Specifically, the stainless steel sheet 5 is connected to the sleeve 2 through the mounting screws 6, and the outer surface of the positioning pin 305 is press-fitted with the inner surface of the positioning groove 4.

[0024] Specifically, the outer surface of the first limiting portion 306 is in contact with the end of the sleeve 2 away from the combustion furnace 1, and the outer surface of the second limiting portion 308 is in contact with the outer surface of the stainless steel sheet 5.

[0025] Specifically, the outer surface of the silicon nitride heating element 301 is sleeved and adapted to the inside of the ceramic plug 8, and the outer surface of the lead wire 304 penetrates through the ceramic flange 302 and extends to the outside.

[0026] Specifically, the igniter rod assembly 3 is connected to the sleeve 2 through the stainless steel sheet 5 and the mounting screws 6, and the end of the ceramic plug 8 is arranged inside the first communication hole 103.

[0027] The working principle and beneficial effects of the above embodiments.

[0028] In use, insert the silicon nitride heating element 301 into the sleeve 2, align the positioning pin 305 with the positioning groove 4 on the sleeve 2 until the first limiting portion 306 on the ceramic flange 302 abuts against the end of the sleeve 2. Then, slip the stainless steel sheet 5 over the outer surface of the ceramic flange 302 and make the outer surface of the stainless steel sheet 5 abut against the second limiting portion 308 on the ceramic flange 302. Next, use the mounting screw 6 to mount the stainless steel sheet 5 on the sleeve 2, so that the igniter assembly 3 is mounted together with the sleeve 2. Through the above mounting method, the installation of the igniter is made simpler and more convenient. With the cooperation of the positioning pin 305 and the positioning groove 4, the installation of the igniter is more accurate and the igniter is not prone to looseness. Through the provided internal through hole 307, it is used to increase the air circulation inside the igniter and improve the use effect of the igniter. The combustion furnace 1 includes three structures: the first furnace body 101, the second furnace body 102, and the third furnace body 105. When the combustion furnace 1 adopts the structure of the first furnace body 101, a ceramic plug 8 is provided at one end of the sleeve 2 close to the first communication hole 103. The first communication hole 103 is used for the hot air to circulate for heating. The ceramic plug 8 can prevent dust from entering when the air circulates, and at the same time can also prevent blockage, facilitating the igniter to ignite better. When the combustion furnace 1 adopts the structure of the second furnace body 102, a plurality of ventilation small holes 104 are used for the hot air to circulate for heating. Since the ventilation small holes 104 have a smaller inner diameter, the heat passing through can be higher, and dust can also be blocked. When the combustion furnace 1 adopts the structure of the third furnace body 105, the second communication hole 106 is the same as the first communication hole 103. At this time, only the igniter assembly 3 is provided in the sleeve 2 connected to the third furnace body 105, and the third furnace body 105 is directly communicated with the sleeve 2, so that the igniter assembly 3 directly heats the third furnace body 105. The lead wire 304 uses a high-temperature wire with a high-temperature tolerance of 450°C. The terminal 7 is connected to the lead wire 304, and various external power supplies can be connected as needed. Each ceramic component can withstand high temperatures of 1200°C, and the firing temperature of the silicon nitride heating element 301 is 1780°C, which can make the igniter have higher safety.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0030] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An ignition rod, comprising a combustion furnace (1), characterized in that: The outer surface of the combustion furnace (1) is fixedly connected to a sleeve (2), an ignition rod assembly (3) is arranged inside the sleeve (2), a ceramic plug (8) is fixedly connected to the inner surface of the sleeve (2), the ignition rod assembly (3) comprises a silicon nitride heating element (301), a heating tungsten wire (303) is arranged inside the silicon nitride heating element (301), a ceramic flange (302) is fixedly connected to the outer surface of the silicon nitride heating element (301), a stainless steel sheet (5) is arranged on the outer surface of the ceramic flange (302), a mounting hole on the outer surface of the stainless steel sheet (5) is provided with a mounting screw (6), a lead wire (304) is arranged at the end of the heating tungsten wire (303), and the lead wire (304) is away from A terminal (7) is provided at one end of the heating tungsten wire (303); an internal through hole (307) is provided inside the ceramic flange (302); a positioning pin (305), a first limiting portion (306) and a second limiting portion (308) are provided on the outer surface of the ceramic flange (302); a positioning groove (4) is provided on the outer surface of the sleeve (2); the combustion furnace (1) comprises a first furnace body (101), a second furnace body (102) and a third furnace body (105); a first connecting hole (103) is provided on the outer surface of the first furnace body (101); a ventilation hole (104) is provided on the outer surface of the second furnace body (102); and a second connecting hole (106) is provided on the outer surface of the third furnace body (105).

2. An ignition rod according to claim 1, characterized in that: The interior of the sleeve (2) is connected to the interior of the first furnace body (101) via the first connecting hole (103), the interior of the sleeve (2) is connected to the interior of the second furnace body (102) via the ventilation hole (104), and the interior of the sleeve (2) is connected to the interior of the third furnace body (105) via the second connecting hole (106).

3. The ignition rod according to claim 1, characterized in that: The stainless steel sheet (5) is connected to the sleeve (2) via a mounting screw (6), and the outer surface of the positioning pin (305) is pressed and fitted with the inner surface of the positioning groove (4).

4. The ignition rod according to claim 1, characterized in that: The outer surface of the first limiting portion (306) contacts an end of the sleeve (2) away from the combustion furnace (1), and the outer surface of the second limiting portion (308) contacts an outer surface of the stainless steel sheet (5).

5. The ignition rod according to claim 1, characterized in that: The outer surface of the silicon nitride heating element (301) is fitted into the interior of the ceramic plug (8), and the outer surface of the lead wire (304) passes through the ceramic flange (302) and extends to the outside.

6. The ignition rod according to claim 1, characterized in that: The ignition rod assembly (3) is connected to the sleeve (2) via a stainless steel sheet (5) and a mounting screw (6), and the end of the ceramic plug (8) is arranged inside the first communication hole (103).

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