Ignition cap and ignition device

Abstract

The present application generally relates to the technical field of furnace tube equipment, and specifically, to an ignition cap and an ignition device. The ignition cap is installed in the ignition device, the first tube body is used to transport oxygen, and the second tube body is used to transport hydrogen. The igniter is arranged close to the second air outlet, the first air outlet is located in front of the second air outlet, and the first air outlet is arranged on the peripheral side of the first tube body, so that the air outlet direction of the first air outlet intersects with the air outlet direction of the second air outlet, thereby accelerating the mixing of hydrogen and oxygen. During the actual use of the ignition device, the first tube body can be located above the second tube body, so that the first air outlet is set upward, the density of oxygen is greater than that of hydrogen, and oxygen and hydrogen flow upward and downward to mix, thereby improving the uniformity of the hydrogen and oxygen mixing, and after the oxygen is ejected from the first tube body, it flows downward along the inner wall of the ignition chamber, which is conducive to the oxygen being evenly heated by the heater, thereby ensuring the temperature of the gas in the ignition chamber, making the gas burn fully, and avoiding the risk of explosion.

Description

Technical Field

[0001] The present application generally relates to the technical field of furnace tube equipment, and in particular to an ignition cap and an ignition device. Background Art

[0002] The diffusion process requires the use of hydrogen-oxygen combustion for wet oxygen oxidation. During the process of hydrogen and oxygen input into the ignition chamber, oxygen and hydrogen are controlled separately, which can only ensure that oxygen and hydrogen enter at the same time. However, if hydrogen and oxygen cannot be mixed evenly after entering the ignition chamber, incomplete combustion will occur, and there may even be a risk of explosion for a long time. Summary of the Invention

[0003] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. This Summary of the Application is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] In order to solve the technical problem of incomplete combustion caused by uneven mixing of hydrogen and oxygen in the existing ignition chamber, the present application provides an ignition cap and an ignition device.

[0005] To achieve the above-mentioned invention objectives, this application adopts the following technical solutions:

[0006] An ignition cap, comprising a cap body, and provided on the cap body:

[0007] The first tube body is provided with a first air outlet;

[0008] a second tube body, arranged in parallel with the first tube body, the second tube body being provided with a second air outlet; and

[0009] an igniter, disposed adjacent to an outer peripheral side of the second air outlet;

[0010] Wherein, the first air outlet is located in front of the second air outlet, and the first air outlet is provided on the peripheral side of the first tube body.

[0011] Furthermore, in some embodiments of the present application, the first air outlet is located on a side of the first tube body facing away from the second air outlet;

[0012] and / or

[0013] The first tube is used to transport oxygen; the second tube is used to transport hydrogen.

[0014] Furthermore, in some embodiments of the present application, the second tube body is provided with a constriction structure at the second gas outlet to accelerate the flow of the gas.

[0015] Furthermore, in some embodiments of the present application, the cap body includes an assembly part and a fixing part, the first tube body, the second tube body, and the fixing part are installed on the assembly part, and the fixing part is used to connect the igniter so that the igniter is fixed on the assembly part.

[0016] Furthermore, in some embodiments of the present application, the igniter includes a silicon carbide ring, the fixing part passes through the silicon carbide ring, and a hook is provided at one end of the fixing part passing through the silicon carbide ring, and the fixing part is also provided with a fixing rib, and the silicon carbide ring is located between the hook and the fixing rib. Furthermore, in some embodiments of the present application, the fixing part is provided with a temperature measuring hole, and the temperature measuring hole extends along the length direction of the fixing part to the igniter.

[0017] Furthermore, in some embodiments of the present application, the temperature measuring hole includes a first hole segment and a second hole segment, the diameter of the second hole segment is smaller than the diameter of the first hole segment, and the igniter is located on the outer periphery of the second hole segment.

[0018] Furthermore, in some embodiments of the present application, the diameter of the first air outlet is defined as b1, the distance from the center of the first air outlet to the end of the first tube body is defined as b2, the inner diameter of the first tube body is defined as b3, and the outer diameter of the first tube body is defined as b4, then b4>b2>b3>b1, and b3>2b1.

[0019] An ignition device comprises the above-mentioned ignition cap.

[0020] Furthermore, some embodiments of the present application further include a housing and a heater. The housing has an ignition chamber and an exhaust hole connected to the ignition chamber. The first tube has a first air outlet on one side, the second tube has a second air outlet on one side, and the igniter is located within the ignition chamber. The heater surrounds the igniter and is located outside the housing. As can be seen from the above technical solution, the advantages and positive effects of the ignition cap and ignition device of the present application are:

[0021] The present application provides an ignition cap and an ignition device, wherein the ignition cap is installed in the ignition device, the ignition cap includes a first tube body, a second tube body and an igniter, the first tube body is provided with a first gas outlet, the first tube body is used to transport oxygen, the second tube body is arranged in parallel with the first tube body, the second tube body is provided with a second gas outlet, the second tube body is used to transport hydrogen, the igniter is arranged close to the second gas outlet, that is, the igniter is close to the hydrogen outlet, the first gas outlet is located in front of the second gas outlet, the first gas outlet is arranged on the circumference of the first tube body, so that the gas outlet direction of the first gas outlet intersects with the gas outlet direction of the second gas outlet, thereby accelerating the mixing of hydrogen and oxygen, and in actual use of the ignition device, the first tube body can be located above the second tube body, so that the first gas outlet is arranged upward, the density of oxygen is greater than that of hydrogen, the oxygen and hydrogen flow upward and downward to mix, thereby improving the uniformity of the hydrogen and oxygen mixing, and after the oxygen is ejected from the first tube body, it flows downward along the inner wall of the ignition chamber, which is conducive to the oxygen being evenly heated by the heater, thereby ensuring the temperature of the gas in the ignition chamber, making the gas burn fully, and avoiding the risk of explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 FIG1 is a schematic diagram showing the structure of an ignition cap according to an exemplary embodiment.

[0025] Figure 2 FIG1 is a schematic structural diagram of an ignition cap from another perspective according to an exemplary embodiment.

[0026] Figure 3 FIG1 is a schematic diagram of a first tube body in an ignition cap according to an exemplary embodiment.

[0027] Figure 4 FIG1 is a schematic diagram of a second tube body of an ignition cap according to an exemplary embodiment.

[0028] Figure 5 FIG1 is a schematic diagram of a fixing member of an ignition cap according to an exemplary embodiment.

[0029] Figure 6 FIG. 1 is a schematic diagram of a mounting tube of an ignition cap according to an exemplary embodiment.

[0030] Figure 7 FIG1 is a schematic diagram showing an ignition device including an ignition cap assembly according to an exemplary embodiment.

[0031] Figure 8 is a partial cross-sectional schematic diagram showing an ignition device according to an exemplary embodiment.

[0032] The description of the accompanying drawings is as follows:

[0033] 10-first tube body; 11-first air outlet;

[0034] 20-second tube body; 21-second air outlet; 22-narrowing structure;

[0035] 30-silicon carbide ring;

[0036] 40-fixing piece; 41-temperature measuring hole; 42-hook; 411-first hole section; 412-second hole section;

[0037] 50-fixed ribs;

[0038] 60-assembly part; 61-first assembly hole; 62-second assembly hole; 63-third assembly hole;

[0039] 70-housing; 71-exhaust hole. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] The diffusion process requires the use of hydrogen-oxygen combustion for wet oxygen oxidation. During the process of hydrogen and oxygen input into the ignition chamber, oxygen and hydrogen are controlled separately, which can only ensure that oxygen and hydrogen enter at the same time. However, if hydrogen and oxygen cannot be mixed evenly after entering the ignition chamber, incomplete combustion will occur, and there may even be a risk of explosion for a long time.

[0042] In order to solve the technical problem of incomplete combustion caused by uneven mixing of hydrogen and oxygen in the existing ignition chamber, the present application is to provide an ignition cap and an ignition device, the ignition cap is installed in the ignition device, the ignition cap includes a first tube body 10, a second tube body 20 and an igniter, the first tube body 10 is provided with a first air outlet 11, the first tube body 10 is used to transport oxygen, the second tube body 20 is arranged in parallel with the first tube body 10, the second tube body 20 is provided with a second air outlet 21, the second tube body 20 is used to transport hydrogen, the igniter is arranged close to the second air outlet 21, that is, the igniter is close to the hydrogen port, and the first air outlet 11 is located in front of the second air outlet 21 The first gas outlet 11 is arranged on the peripheral side of the first tube body 10, so that the gas outlet direction of the first gas outlet 11 intersects with the gas outlet direction of the second gas outlet 21, thereby accelerating the mixing of hydrogen and oxygen. During the actual use of the ignition device, the first tube body 10 can be located above the second tube body 20, so that the first gas outlet 11 is set upward. The density of oxygen is greater than that of hydrogen, and oxygen and hydrogen flow upward and downward to mix, thereby improving the uniformity of the hydrogen and oxygen mixing. After the oxygen is ejected from the first tube body 10, it flows downward along the inner wall of the ignition chamber, which is conducive to the uniform heating of the oxygen by the heater, thereby ensuring the temperature of the gas in the ignition chamber, making the gas burn fully, and avoiding the risk of explosion.

[0043] Figure 1 FIG1 is a schematic diagram showing the structure of an ignition cap according to an exemplary embodiment. Figure 2 FIG1 is a schematic structural diagram of an ignition cap from another perspective according to an exemplary embodiment. Figure 3 FIG. 1 is a schematic diagram of a first tube 10 in an ignition cap according to an exemplary embodiment. Figure 4 FIG. 1 is a schematic diagram of a second tube body 20 of an ignition cap according to an exemplary embodiment. Figure 5 FIG. 4 is a schematic diagram of a fixing member 40 of an ignition cap according to an exemplary embodiment. Figure 6 FIG. 1 is a schematic diagram of a mounting tube of an ignition cap according to an exemplary embodiment. Figure 7 FIG1 is a schematic diagram showing an ignition device including an ignition cap assembly according to an exemplary embodiment.

[0044] refer to Figure 1-8 As shown, the present application provides an ignition cap and an ignition device, the ignition device is equipped with the ignition cap, and the uniformity of hydrogen and oxygen mixing is improved by improving the oxygen outlet, hydrogen outlet and igniter position in the ignition cap. The igniter is set close to the hydrogen outlet to ensure complete gas combustion.

[0045] The ignition cap includes a cap body, a first tube body 10, a second tube body 20, an igniter and a fixing part 40 arranged on the cap body, and the cap body includes an assembly part 60. The first tube body 10, the second tube body 20 and the fixing part 40 are installed on the assembly part 60. The length of the first tube body 10 is greater than the length of the second tube body 20. The first tube body 10 and the second tube body 20 are respectively located on opposite sides of the assembly part 60.

[0046] In the present application, the first tube body 10 is used to transport oxygen, and the second tube body 20 is used to transport hydrogen. The first tube body 10 is provided with a first gas outlet 11, which is an oxygen outlet, and the second tube body 20 is provided with a second gas outlet 21, which is a hydrogen outlet. The igniter is arranged on the outer peripheral side of the second gas outlet 21, that is, the igniter is close to the hydrogen outlet, the first gas outlet 11 is located in front of the second gas outlet 21, and the first gas outlet 11 is arranged on the first tube body. The peripheral side of the body 10, that is, the first gas outlet 11 discharges gas in the radial direction of the first tube body 10, and the second gas outlet 21 discharges gas in the axial direction of the second tube body 20, so that the gas outlet direction of the first gas outlet 11 intersects with the gas outlet direction of the second gas outlet 21, accelerates the mixing of hydrogen and oxygen, and avoids the situation where hydrogen and oxygen are mixed on the side away from the first gas outlet 11 and the second gas outlet 21 in the ignition chamber when the hydrogen and oxygen are ejected in the same direction, resulting in uneven hydrogen and oxygen mixing around the gas outlet and incomplete combustion.

[0047] During actual use of the ignition device, the first gas outlet 11 can be set upward, and the first tube body 10 is located above the second tube body 20. Therefore, the first gas outlet 11 is set back to the second tube body 20. The first gas outlet 11 is close to the inner wall of the ignition chamber. After oxygen is ejected from the first tube body 10, it flows downward along the inner wall of the ignition chamber, which is conducive to uniform heating of the oxygen by the heater, ensuring the temperature of the gas in the ignition chamber, and making the gas burn fully. The density of oxygen is greater than that of hydrogen, and oxygen and hydrogen flow upward and downward to mix, thereby improving the uniformity of hydrogen-oxygen mixing, making the gas burn fully, and avoiding the risk of explosion.

[0048] The igniter includes a silicon carbide ring 30, and the fixing part 40 has a columnar structure. The fixing part 40 passes through the silicon carbide ring 30, and a hook 42 is provided at one end of the fixing part 40 passing through the silicon carbide ring 30. The hook 42 blocks the silicon carbide ring 30 to prevent the silicon carbide ring 30 from falling out. A fixing rib 50 is also provided on the fixing part 40. The fixing rib 50 is located on the side of the silicon carbide ring 30 facing away from the hook 42, that is, the silicon carbide ring 30 is limited between the hook 42 and the fixing rib 50, thereby preventing the silicon carbide ring 30 from moving.

[0049] refer to Figure 3 As shown, one end of the first tube body 10 is an air inlet, and the other end of the first tube body 10 is a closed end. Near the closed end, the first tube body 10 radially opens a first air outlet 11. In the present application, the first air outlet 11 is circular.

[0050] The diameter of the first air outlet 11 is defined as b1, the distance from the center of the first air outlet 11 to the closed end of the first tube body 10 is defined as b2, the maximum inner diameter of the first tube body 10 is defined as b3, and the maximum outer diameter of the first tube body 10 is defined as b4.

[0051] In the present application, b4>b2>b3>b1, and b3>2b1, to ensure the speed of oxygen ejected from the first tube body 10, b3<b2<1.1b3, thereby preventing the first gas outlet 11 from being too far away from the closed end of the first tube body 10, preventing the oxygen entering the first tube body 10 from strongly colliding with the oxygen flowing back from the closed end of the first tube body 10, thereby affecting the oxygen ejection speed.

[0052] Example;

[0053] The length of the first tube body 10 can be 170mm-180mm, the diameter of the first air outlet 11 is 2.4mm-2.8mm, the distance between the center of the first air outlet 11 and the closed end of the first tube body 10 is 7.2mm-7.5mm, the maximum inner diameter of the first tube body 10 is 7mm, and the maximum outer diameter of the first tube body 10 is 10mm.

[0054] refer to Figure 4 As shown, the second tube body 20 is a straight tube structure, one end of the second tube body 20 is an inlet end, and the other end of the second tube body 20 is provided with a second gas outlet 21. The second tube body 20 is used for hydrogen transmission.

[0055] The maximum outer diameter of the second tube body 20 is defined as a1, and the maximum inner diameter of the second tube body 20 is defined as a2. In the present application, a1=b4, a2=b3, that is, the maximum outer diameter of the second tube body 20 is equal to the maximum outer diameter of the first tube body 10, and the maximum inner diameter of the second tube body 20 is equal to the maximum inner diameter of the first tube body 10, so as to control the transmission ratio of hydrogen and oxygen.

[0056] Example:

[0057] The length of the second tube body 20 is 145 mm-155 mm, the inner diameter of the second tube body 20 is 7 mm, and the outer diameter of the second tube body 20 is 10 mm.

[0058] In order to increase the ejection speed of hydrogen from the second tube body 20 and thus limit the size of the second gas outlet 21 , the second tube body 20 is provided with a constriction structure 22 near the second gas outlet 21 to accelerate the gas flow speed.

[0059] refer to Figure 5As shown, the fixing member 40 is a columnar structure, and the silicon carbide ring 30 is passed through the fixing member 40, and a hook 42 is provided at one end of the fixing member 40 passing through the silicon carbide ring 30, and the hook 42 blocks the silicon carbide ring 30 to prevent the silicon carbide ring 30 from falling out. A fixing rib 50 is also provided on the fixing member 40, and the fixing rib 50 is located on the side of the silicon carbide ring 30 facing away from the hook 42, that is, the silicon carbide ring 30 is limited between the hook 42 and the fixing rib 50, thereby preventing the silicon carbide ring 30 from moving.

[0060] In a specific example, the fixing rib 50 is extended toward the second tube body 20 , and the fixing rib 50 is fixedly connected to the second tube body 20 , further improving the stability of the fixing member 40 and the silicon carbide ring 30 .

[0061] The fixing part 40 is provided with a temperature measuring hole 41, which extends along the length direction of the fixing part 40 to the igniter. The temperature measuring hole 41 includes a first hole section 411 and a second hole section 412. The diameter of the second hole section 412 is smaller than the diameter of the first hole section 411, and the igniter is located on the outer peripheral side of the second hole section 412, so that the inner wall of the temperature measuring hole is closer to the thermocouple thermometer, thereby improving the temperature measurement accuracy.

[0062] In the present application, the fixing member 40 is tilted relative to the second tube 20. Figure 1 The state shown is for reference only. The angle between the fixing member 40 and the horizontal plane is between 80° and 85°. If the angle is too large, the fixing member 40 may be too close to the second tube body 20, affecting the accuracy of temperature measurement. If the size is too small, it is impossible to open a proper assembly hole in the assembly member 60.

[0063] refer to Figure 1 、 2 As shown in 6, the assembly part 60 is a cup-shaped structure, and a first assembly hole 61, a second assembly hole 62 and a third assembly hole 63 are provided at the bottom of the assembly part 60, wherein the first assembly hole 61 and the second assembly hole 62 are respectively located on opposite sides of the assembly part 60, and the third assembly hole 63 is arranged close to the second assembly hole 62. The first tube body 10 is sealed and connected to the first assembly hole 61, the second tube body 20 is sealed and connected to the second assembly hole 62, and the fixing part 40 is sealed and connected to the third assembly hole 63.

[0064] In the present application, a tie rod is provided inside the assembly part 60 , and the first tube body 10 , the second tube body 20 and the fixing part 40 are fixedly connected to the assembly part 60 via one tie rod respectively, thereby ensuring the stability of the first tube body 10 , the second tube body 20 and the fixing part 40 .

[0065] Combine Figure 1-2As shown, in the axial direction of the second tube body 20, the distance between the second gas outlet 21 and the center of the first gas outlet 11 is L, L=6b1, to avoid the first gas outlet 11 being too far away from the second gas outlet 21. After the hydrogen is sprayed out for a distance, it mixes with the oxygen in front to ensure uniform mixing of hydrogen and oxygen.

[0066] refer to Figure 7 、 8 As shown, the present application also provides an ignition device, which includes a shell 70, a heater and the above-mentioned ignition cap. The shell 70 has an ignition chamber and an exhaust hole 71 and a mounting hole connected to the ignition chamber. The assembly part 60 is installed in the mounting hole, so that the first tube body 10, the second tube body 20 and the fixing part 40 are partially located inside the ignition chamber.

[0067] Among them, the first air outlet 11, the second air outlet 21 and the silicon carbide ring 30 are located in the ignition chamber, and the heater is arranged around the outside of the shell 70 corresponding to the igniter. In the present application, the shell is a tubular structure. In the length direction of the shell, the first air outlet 11, the second air outlet 21 and the silicon carbide ring 30 are within the coverage range of the heater. Preferably, the silicon carbide ring 30 is the heating center position, so as to effectively heat the silicon carbide ring 30 and realize rapid ignition of the ignition chamber. The first tube body is located above the second tube body. After oxygen is ejected from the first tube body 10, it flows downward along the inner wall of the ignition chamber, which is conducive to the uniform heating of the oxygen by the heater, ensuring the temperature of the gas in the ignition chamber, making the gas burn fully, and avoiding the risk of explosion due to insufficient combustion for a long time.

[0068] It should be noted that, in the present application, the first tube body 10 , the second tube body 20 , the fixing member 40 , the assembly member 60 , the fixing rib 50 and the shell 70 are all made of quartz material and are resistant to high temperatures.

[0069] In summary, the present application provides an ignition cap and an ignition device, the ignition device is equipped with the ignition cap, the ignition cap includes a first tube body 10, a second tube body 20 and an igniter, the first tube body 10 is provided with a first air outlet 11, the first tube body 10 is used to transport oxygen, the second tube body 20 is arranged in parallel with the first tube body 10, the second tube body 20 is provided with a second air outlet 21, the second tube body 20 is used to transport hydrogen, the igniter is arranged on the outer peripheral side of the second air outlet 21, that is, the igniter is close to the hydrogen outlet, the first air outlet 11 is located in front of the second air outlet 21, the first air outlet 11 is arranged on the peripheral side of the first tube body 10, so that the air outlet direction of the first air outlet 11 intersects with the air outlet direction of the second air outlet 21, accelerating the mixing of hydrogen and oxygen, and in actual use of the ignition device, the first air outlet 11 is arranged upward, the density of oxygen is greater than that of hydrogen, which helps oxygen to flow downward and mix with hydrogen, improves the uniformity of hydrogen and oxygen mixing, makes the gas burn fully, and avoids the risk of explosion.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0071] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An ignition cap, characterized in that: It includes a cap body, and is provided on the cap body: The first tube body is provided with a first air outlet; a second tube body, arranged in parallel with the first tube body, the second tube body being provided with a second air outlet; and an igniter, disposed adjacent to an outer peripheral side of the second air outlet; Wherein, the first air outlet is located in front of the second air outlet, and the first air outlet is provided on the peripheral side of the first tube body; The cap body includes an assembly part and a fixing part. The first tube body, the second tube body, and the fixing part are installed on the assembly part. The fixing part is used to connect the igniter so that the igniter is fixed on the assembly part. The igniter includes a silicon carbide ring, the fixing piece passes through the silicon carbide ring, and one end of the fixing piece passing through the silicon carbide ring is provided with a hook, the fixing piece is further provided with a fixing rib, and the silicon carbide ring is located between the hook and the fixing rib; The fixing piece is provided with a temperature measuring hole, and the temperature measuring hole extends along the length direction of the fixing piece to the igniter; The diameter of the first air outlet is defined as b1, the distance from the center of the first air outlet to the end of the first tube body is defined as b2, the inner diameter of the first tube body is defined as b3, and the outer diameter of the first tube body is defined as b4, then b4>b2>b3>b1, and b3>2b1.

2. The ignition cap according to claim 1, characterized in that The first air outlet is located on a side of the first tube body facing away from the second air outlet; and / or The first tube is used to transport oxygen; the second tube is used to transport hydrogen.

3. The ignition cap according to claim 1, characterized in that: The second tube body is provided with a constriction structure at the second gas outlet to accelerate the flow of gas.

4. The ignition cap according to claim 1, wherein: The temperature measuring hole includes a first hole segment and a second hole segment, the diameter of the second hole segment is smaller than the diameter of the first hole segment, and the igniter is located on the outer circumference of the second hole segment.

5. An ignition device, characterized in that: The invention comprises the ignition cap according to any one of claims 1 to 4.

6. The ignition device according to claim 5, characterized in that It also includes a shell and a heater, the shell has an ignition chamber and an exhaust hole connected to the ignition chamber, the first tube body is provided with a first air outlet on one side, the second tube body is provided with a second air outlet on one side, and the igniter is located in the ignition chamber, and the heater is arranged around the igniter on the outside of the shell.

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