A stationary ignition device based on plasma technology

Abstract

The application relates to the technical field of ignition, in particular to a fixed ignition device based on plasma technology, which comprises a coal powder channel, an ignition channel arranged in the coal powder channel, a mixing assembly, a propelling assembly, and the like. The mixing assembly comprises an oil gun arranged on the outer wall of the coal powder channel, an atomized liquid oil pipe arranged on the outer wall of the oil gun and a compressed air pipe. The propelling assembly comprises a threaded rod arranged in the oil gun, an eccentric wheel arranged on the outer wall of the threaded rod and a cover plate arranged on the outer wall of the threaded rod. The mixed gas is mixed in the oil gun and then sprayed into the coal powder channel, and the internal channel is ignited by electric spark. The ignition position is separated from the ignition equipment, so that the burning loss of the oil gun is effectively avoided. Meanwhile, the whole device is installed on the surface of the coal powder channel, so that the telescopic operation is not needed, the oil gun is not blocked and the like, and the safety of the next operation is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of ignition technology, and in particular to a fixed ignition device based on plasma technology. Background Technology

[0002] Currently, most coal-fired power plants use oil guns and ignition guns with propellers in their fuel oil systems. When ignition is needed, the oil gun and ignition gun must be pushed into the furnace, then the ignition gun is activated, and the fuel valve is opened to allow fuel to flow through the oil gun. After successful ignition, the ignition gun is withdrawn to prevent the tip from burning in the combustion zone. This method frequently results in the ignition gun burning due to jamming of the oil gun and ignition gun propeller, causing a certain degree of waste and creating a potential hazard for subsequent ignition attempts, and in extreme cases, affecting stable combustion. Furthermore, due to limited installation space in some locations, the inspection and maintenance of the ignition gun, oil gun, and propeller are very inconvenient. Summary of the Invention

[0003] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0004] In view of the problems existing in the above or prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a fixed ignition device based on plasma technology.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fixed ignition device based on plasma technology, comprising a pulverized coal channel and an ignition channel disposed inside the pulverized coal channel; and,

[0007] The mixing assembly includes an oil gun disposed on the outer wall of the pulverized coal channel, an atomizing liquid oil pipe disposed on the outer wall of the oil gun, and a compressed air pipe;

[0008] The propulsion assembly includes a threaded rod disposed inside the oil gun, an eccentric wheel disposed on the outer wall of the threaded rod, and a cover plate disposed on the outer wall of the threaded rod.

[0009] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, wherein: the inner wall of the pulverized coal channel is provided with a first receiving groove, and the inner wall of the first receiving groove is provided with a first inclined surface.

[0010] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, wherein: a first elastic element is provided inside the first receiving groove, a heat insulation plate is slidably provided inside the first receiving groove, a second inclined surface is provided on the outer wall of the heat insulation plate, a fine hole is provided through the heat insulation plate, and a one-way valve is provided on the inner wall of the fine hole.

[0011] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, wherein: a limiting rod is connected to one end of the threaded rod near the heat insulation plate, a bearing is provided on the outer wall of the limiting rod, and the outer wall of the bearing is connected to the heat insulation plate.

[0012] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the inner wall of the oil gun is provided with a tray, a frustum is slidably provided inside the tray, a piston is provided at one end of the frustum, and a second elastic element is sleeved on the outer wall of the piston.

[0013] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the eccentric wheel includes a cylinder, the outer wall of the cylinder is provided with an abutting block, the outer wall of the abutting block is provided with a first arc surface, and the outer wall of the abutting block is provided with a plane.

[0014] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the cylinder has a cavity inside, a limiting plate is provided on the inner wall of the cavity, a third elastic element is provided on the outer wall of the limiting plate, and the other end of the third elastic element is connected to the inner wall of the cavity.

[0015] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the outer wall of the threaded rod is provided with a support rod.

[0016] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the inner wall of the oil gun is provided with a first sliding groove, and the outer wall of the cover plate is provided with a slider that can slide along the first sliding groove.

[0017] As a preferred embodiment of the fixed ignition device based on plasma technology described in this invention, the threads on the outer wall of the threaded rod are adapted to the threads on the inner wall of the cover plate.

[0018] The beneficial effects of this invention are as follows: This invention relies on mixing the gas mixture inside the oil gun and then injecting it into the pulverized coal channel, where it is ignited by an electric spark; the ignition point is isolated from the ignition equipment, effectively avoiding damage to the oil gun; at the same time, the entire device is installed on the surface of the pulverized coal channel, eliminating the need for extension and retraction and preventing oil gun jamming, thus effectively improving the safety of subsequent operations. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall appearance structure of a stationary ignition device based on plasma technology.

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of a stationary ignition device based on plasma technology.

[0022] Figure 3 For stationary ignition devices based on plasma technology Figure 2 Enlarged schematic diagram of the structure of region B in the middle.

[0023] Figure 4 This is a schematic diagram of the internal structure of the oil gun in a fixed ignition device based on plasma technology.

[0024] Figure 5 This is a schematic diagram of the internal cylindrical structure and piston assembly structure of a stationary ignition device based on plasma technology. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments. Example 1

[0028] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a fixed ignition device based on plasma technology, comprising: a pulverized coal channel A; an ignition channel A1 disposed inside the pulverized coal channel A; and...

[0029] The mixing assembly 100 includes an oil gun 101 disposed on the outer wall of the pulverized coal channel A, an atomizing liquid oil pipe 102 disposed on the outer wall of the oil gun 101, and a compressed air pipe 103.

[0030] The propulsion assembly 200 includes a threaded rod 201 disposed inside the oil gun 101, an eccentric wheel 202 disposed on the outer wall of the threaded rod 201, and a cover plate 203 disposed on the outer wall of the threaded rod 201.

[0031] The pulverized coal pipeline A is the normal channel for transporting pulverized coal in the thermal power plant. An electric spark ignition device is installed inside the ignition channel A1. An oil gun 101 is fixedly connected to the outer wall of the pulverized coal pipeline A. The oil gun 101 is cylindrical, and atomizing liquid oil pipes 102 are connected to its outer wall. These pipes deliver atomized fuel oil into the oil gun 101. Compressed air pipes 103 transport an oxygen-containing gas mixture into the oil gun 101, further mixing the atomized liquid oil with the gas mixture before spraying it into the pulverized coal pipeline A. Ignition then occurs through the ignition channel A1. This avoids inserting the oil gun 101 into the pulverized coal pipeline A, preventing the pulverized coal in the entire pipeline from igniting after the liquid oil is lit, thus avoiding burning the outer wall of the oil gun 101, causing damage, and making it inconvenient to remove or disassemble the gun later.

[0032] It should be noted that the threaded rod 201 is connected to a power drive mechanism near its outer end. The main function of the power drive mechanism is to rotate the threaded rod 201; this mechanism can be a drive component such as a motor. The eccentric wheel 202 on the outer wall of the threaded rod 201 is an eccentric frustum with a protrusion on its outer wall. When the eccentric wheel 202 rotates, the protrusion can block the atomized liquid oil pipe 102 or the compressed air pipe 103. As the eccentric wheel 202 rotates continuously, it also mixes and stirs the two gases. Simultaneously, when the atomized liquid oil and the mixed air are mixed, rotating the threaded rod 201 causes the eccentric wheel 202 on its outer wall to move continuously towards the outside of the pulverized coal channel A, thus providing sufficient space for the mixed gas inside. As the atomized liquid oil and oxygen-containing gas continue to mix, when a certain amount is reached, the eccentric wheel 202 will block the atomized liquid oil pipe 102, and then push the cover plate 203 towards the inside of the pulverized coal channel A. During this process, the oxygen-containing gas channel continues to transport the gas. The mixed gas containing liquid oil is sprayed from the oil gun 101 into the coal powder channel A. During this process, the cover plate 203 continuously pushes the mixed gas into the coal powder channel A. Its atomizing liquid oil pipe 102 is closed, and the compressed air pipe 103 continuously delivers gas. Therefore, the liquid oil content in the latter half of the cover plate 203 is relatively low. During this process, when the liquid oil-containing mixed gas is sprayed into the coal powder channel A, the gas is ignited through the ignition channel. The flame will spread along the direction of the spray. The cover plate 203 continues to push, the amount of liquid oil inside decreases, and the gas flow direction is still towards the inside of the coal powder channel A. Therefore, the flame will not spread into the oil gun 101. When the cover plate 203 stops moving, the oxygen-containing gas is still transporting the gas, and the gas is still moving into the inside of the coal powder channel A until the atomizing liquid oil inside the oil gun 101 is emptied. Then the transport of the compressed air pipe 103 is stopped. Under the premise of ensuring the ignition of the coal powder channel A, the problem of the oil gun being burned when it is inserted into the coal powder channel A is effectively solved. Example 2

[0033] Reference Figures 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that: it also includes a first receiving groove A2 provided on the inner wall of the pulverized coal channel A, and a first inclined surface A2-1 provided on the inner wall of the first receiving groove A2.

[0034] Among them, there is a circular first receiving groove A2 on the inner wall of the pulverized coal channel A near the oil gun 101. The inner wall of the first receiving groove A2 has a first inclined surface A2-1. The main function is to allow the mixed gas containing liquid oil to diffuse in all directions along the first inclined surface A2-1. The advantage of this is that it increases the mixing surface of pulverized coal and liquid oil, and the diffusion of gas in all directions helps to form a uniform gas concentration distribution in the space, which can improve combustion efficiency.

[0035] The first receiving groove A2 is provided with a first elastic element 104, and a heat insulation plate 105 is slidably provided inside the first receiving groove A2. The outer wall of the heat insulation plate 105 is provided with a second inclined surface 105a, and the heat insulation plate 105 is provided with a fine hole 105b, and a one-way valve is provided on the inner wall of the fine hole 105b.

[0036] The inner wall of the first receiving tank A2 is fixedly equipped with a first elastic element 104, which is a compression spring. A heat insulation plate 105 is fixedly installed at the other end of the first elastic element 104. The heat insulation plate has a second inclined surface 105a on its inner wall surface near the first inclined surface A2-1, and the two inclined surfaces are compatible. When the mixed gas inside the oil gun 101 begins to advance into the pulverized coal pipe A, the gas pushes open the heat insulation plate 105, pulls the first elastic element 104, and the gas is sprayed out between the two inclined surfaces, spreading outwards. Then, ignition occurs, and the gas continuously spreads outwards, ensuring that the flame does not spread inwards. Subsequently, the oxygen-containing gas continuously pushes the heat insulation plate 105 outwards. One advantage is that there are no combustibles, cutting off the flame outside the heat insulation plate 105. The second advantage is that it blows away pulverized coal, preventing it from entering the space between the two inclined surfaces, causing combustion between the two inclined surfaces and damaging the heat insulation plate. Hot plate; In order to further ensure that the mixed gas containing liquid oil is evenly dispersed outside the heat insulation plate 105, the heat insulation plate 105 is perforated with multiple fine holes 105b, and the shape of the fine holes 105b is a funnel shape that gradually increases in size inside the pulverized coal pipe A. Each fine hole 105b has a one-way valve on its inner wall, so that the gas can only enter the pulverized coal channel A from inside the oil gun 101. This scheme uses a spring and a plug ball to realize the one-way valve. The spring is fixed to the inner wall of the fine hole 105b, and a plug ball is fixed to the end facing the oil gun 101, thereby realizing the function of the one-way valve.

[0037] One end of the threaded rod 201 near the heat insulation plate 105 is connected to a limiting rod 106. The outer wall of the limiting rod 106 is provided with a bearing 107, and the outer wall of the bearing 107 is connected to the heat insulation plate 105.

[0038] To ensure stable operation of the threaded rod 201, a limiting rod 106 is connected to the end of the threaded rod 201 near the heat insulation plate 105. The limiting rod 106 is connected to the heat insulation plate 105 by a bearing 107. It should be noted that the limiting rod 106 and the threaded rod 201 are connected by a keyway. The advantage of this design is that the rotation of the threaded rod 201 can drive the limiting rod 106 to rotate. At the same time, when the heat insulation plate 105 moves in the direction of the pulverized coal pipeline A, the limiting rod 106 can also move with the heat insulation plate 105, but will not disengage from the threaded rod 201.

[0039] The inner wall of the oil gun 101 is provided with a tray 101a, and a frustum 108 is slidably provided inside the tray 101a. A piston 108a is provided at one end of the frustum 108, and a second elastic element 109 is sleeved on the outer wall of the piston 108a.

[0040] The tray 101a consists of two arc-shaped plates distributed above and below the frustum 108. Its main function is to provide a sliding path for the frustum 108. The two arc-shaped plates of the tray 101a are distributed at the outlets of the atomizing liquid pipe 102 and the compressed air pipe 103 near the inside of the oil gun 101. The piston 108a can block the atomizing liquid pipe 102 and the compressed air pipe 103. A second elastic element 109, which is a compression spring, is installed between the frustum 108 and the inner wall of the oil gun 101. When the eccentric wheel 202 rotates, the eccentric wheel 202 pushes the frustum 108 towards the inner wall of the oil gun 101. At the same time, it pushes the piston 108a into the corresponding pipe, blocking the corresponding pipe. The advantage of this design is that only one pipe of the two pipes exits air. After the air exits, it is driven by the rotation of the eccentric wheel 202 to flow into the other pipe. The other pipe exits, and the airflow is disturbed by the rotation of the eccentric wheel 202, realizing the continuous fusion of the two gases.

[0041] In summary, when ignition is required, the atomizing liquid pipe 102 and the compressed air pipe 103 are opened, allowing the two gases to begin transporting into the oil gun 101. This drives the threaded rod 201 to rotate, causing the cover plate 203 to move outwards. At this point, the internal space of the oil gun 101 increases, preventing the internal gas from preferentially pushing the heat insulation plate 105. When the cover plate 203 reaches a certain position, the eccentric wheel 202 abuts against the frustum 108 near the atomizing liquid pipe 102, causing the piston 108a to block the atomizing liquid pipe 102. Then, the cover plate 203 is driven to move towards the inside of the pulverized coal pipe 101. At this time, the eccentric wheel 202 does not rotate, the internal gas is compressed, and the gas begins to push the heat insulation plate 105. The gas is ejected through the space between the first inclined surface A2-1 and the second inclined surface 105a and the fine hole 105b, and then ignites the internal gas through the ignition channel A1. Example 3

[0042] Reference Figures 1-5 This is the third embodiment of the present invention, which differs from the previous two embodiments in that: the eccentric wheel 202 includes a cylinder 202a, the outer wall of the cylinder 202a is provided with an abutting block 202b, the outer wall of the abutting block 202b is provided with a first arc surface 202b-1, and the outer wall of the abutting block 202b is provided with a plane 202b-2.

[0043] The eccentric wheel 202 consists of a cylinder 202a and a contact block 202b. One end of the contact block 202b is attached to the surface of the cylinder 202a and then extends outward along the first arc surface 202b-1. The end of the first arc surface 202b-1 is connected to a plane 202b-2. The advantage of the plane 202b-2 is that when the cover plate 203 moves outward to a certain position, the plane 202b-2 will abut against the surface of the frustum 208, making the force linear. The frustum 208 will continuously move on the surface of the first arc surface 202b-1, so that the eccentric wheel 202 will not exert force on the frustum 108 in other directions, thus preventing the eccentric wheel 202 from deflecting.

[0044] The cylinder 202a has a cavity 202a-1 inside. The inner wall of the cavity 202a-1 is provided with a limiting plate 204. The outer wall of the limiting plate 204 is provided with a third elastic element 205. The other end of the third elastic element 205 is connected to the inner wall of the cavity 202a-1.

[0045] Inside the cylinder 202a, there is a cylindrical cavity 202a-1. A limiting plate 204 is rotatably mounted on the inner wall of the cavity 202a-1. One end of the limiting plate 204 is rotatably connected to the inner wall of the cavity 202a-1, and the other end is detached from the inner wall of the cavity 202a-1. A third elastic element 205, which is a compression spring, is installed on the surface of the limiting plate 204 near the inner wall of the cavity 202a-1.

[0046] The outer wall of the threaded rod 201 is provided with a support rod 201a.

[0047] The support rod 201a is fixedly installed on the surface of the threaded rod 201 that passes through the eccentric wheel 202. When the threaded rod 201 rotates, the support rod 201a will abut against the surface of the limiting plate 204, thereby driving the eccentric wheel 202 to rotate together. When the threaded rod 201 reverses, since the outer surface of the eccentric wheel 202 abuts against the surface of the frustum 108, the second elastic element 109 abuts the frustum 108 against the surface of the eccentric wheel 202, which restricts the rotation of the eccentric wheel 202. At this time, the threaded rod 201 reverses, and the support rod 201a will push the limiting plate 204 to squeeze the third elastic element 205, causing the threaded rod 201 to rotate, but the eccentric wheel 202 will not rotate.

[0048] The inner wall of the oil gun 101 is provided with a first groove 101b, and the outer wall of the cover plate 203 is provided with a slider 203a that can slide along the first groove 101b.

[0049] The threads on the outer wall of the threaded rod 201 are compatible with the threads on the inner wall of the cover plate 203.

[0050] The surfaces of the threaded rod 201 and the cover plate 203 that contact each other are provided with corresponding threads. The slider 203a on the outer surface of the cover plate 203 slides along the first groove 101b, restricting the rotation of the cover plate 203. This causes the cover plate 203 to slide back and forth along the surface of the threaded rod 201 without rotating when the threaded rod 201 rotates. The advantage of this design is that when ignition is required, rotating the threaded rod 201 causes the cover plate 203 to move outward, providing space for the gas. Simultaneously, the eccentric wheel 202 stirs the internal gas, ensuring uniform mixing. When a certain position is reached, the eccentric wheel 202 abuts against the frustum 108, closing the atomizing liquid oil pipe 102. Then, the threaded rod 201 is reversed, causing the threaded rod 201 to drive... The cover plate 203 moves towards the inside of the pulverized coal channel 101. Subsequently, the gas pushes the heat insulation plate 105 to move, and the gas begins to be injected into the pulverized coal channel A. Then, the injected mixed gas is ignited by an electric spark, causing the inside of the pulverized coal channel A to burn. Then, when the slider 203a on the outer wall of the cover plate 203 reaches the bottom of the first chute 101b near the heat insulation plate 105, the oxygen-containing mixed gas begins to be continuously injected, continuing to push the heat insulation plate 105. The gas is still being injected outward. This process can isolate the flame at this point. After a certain period of time, the gas transport in the compressed air pipe 103 is stopped, and the heat insulation plate 105 is reset by the first elastic element 104, closing the connection between the oil gun 101 and the inside of the pulverized coal channel A, so that the oil gun 101 will not be burned.

[0051] In summary, when a pulverized coal channel A needs ignition, open the atomizing liquid oil pipe 102 and the compressed air pipe 103, then drive the threaded rod 201 to rotate, allowing the cover plate 203 to move and provide space for the mixed gas. Then, reverse the threaded rod 201 to drive the mixed gas into the pulverized coal channel A evenly, igniting the inside of the pulverized coal channel A. After ensuring internal ignition, stop the compressed air pipe 103. This solution eliminates the need for an oil gun to enter the pulverized coal channel; sealing is achieved through the cover plate 203. Without damaging the cover plate 203, the entire ignition device will not become unusable. Furthermore, it avoids the safety hazards associated with removing the ignition device after use, such as the ignition gun jamming or burning during removal, which could lead to safety issues during subsequent ignitions.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0054] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fixed ignition device based on plasma technology, characterized in that: include, The pulverized coal channel (A), the ignition channel (A1) disposed inside the pulverized coal channel (A); and, The mixing assembly (100) includes an oil gun (101) disposed on the outer wall of the pulverized coal channel (A), an atomizing liquid oil pipe (102) disposed on the outer wall of the oil gun (101), and a compressed air pipe (103). The propulsion assembly (200) includes a threaded rod (201) disposed inside the oil gun (101), an eccentric wheel (202) disposed on the outer wall of the threaded rod (201), and a cover plate (203) disposed on the outer wall of the threaded rod (201). The inner wall of the pulverized coal channel (A) is provided with a first receiving groove (A2), and the inner wall of the first receiving groove (A2) is provided with a first inclined surface (A2-1). The first receiving groove (A2) is provided with a first elastic element (104), and a heat insulation plate (105) is slidably provided inside the first receiving groove (A2). The outer wall of the heat insulation plate (105) is provided with a second inclined surface (105a). The heat insulation plate (105) is provided with a fine hole (105b) through it, and a one-way valve is provided on the inner wall of the fine hole (105b). The threaded rod (201) is connected to a limiting rod (106) at one end near the heat insulation plate (105). The outer wall of the limiting rod (106) is provided with a bearing (107), and the outer wall of the bearing (107) is connected to the heat insulation plate (105). The inner wall of the oil gun (101) is provided with a tray (101a), and a frustum (108) is slidably provided inside the tray (101a). A piston (108a) is provided at one end of the frustum (108), and a second elastic element (109) is sleeved on the outer wall of the piston (108a). The eccentric wheel (202) includes a cylinder (202a), an abutting block (202b) is provided on the outer wall of the cylinder (202a), a first arc surface (202b-1) is provided on the outer wall of the abutting block (202b), and a plane surface (202b-2) is provided on the outer wall of the abutting block (202b). The tray (101a) is composed of two arc-shaped plates, distributed above and below the frustum (108), providing a sliding trajectory for the frustum (108). The trays (101a) of the two arc-shaped plates are distributed at the outlets of the atomizing liquid pipe (102) and the compressed air pipe (103) near the inside of the oil gun (101). The piston (108a) can block the atomizing liquid pipe (102) and the compressed air pipe (103). When the eccentric wheel (202) rotates, the eccentric wheel (202) will push the frustum (108) towards the inner wall of the oil gun (101), and at the same time, push the piston (108a) into the atomizing liquid pipe (102) or the compressed air pipe (103) to block the corresponding pipe.

2. The fixed ignition device based on plasma technology as described in claim 1, characterized in that: The cylinder (202a) has a cavity (202a-1) inside. The inner wall of the cavity (202a-1) is provided with a limiting plate (204). The outer wall of the limiting plate (204) is provided with a third elastic element (205). The other end of the third elastic element (205) is connected to the inner wall of the cavity (202a-1).

3. The fixed ignition device based on plasma technology as described in claim 2, characterized in that: The threaded rod (201) has a support rod (201a) on its outer wall.

4. The fixed ignition device based on plasma technology as described in claim 3, characterized in that: The inner wall of the oil gun (101) is provided with a first groove (101b), and the outer wall of the cover plate (203) is provided with a slider (203a) that can slide along the first groove (101b).

5. The fixed ignition device based on plasma technology as described in claim 4, characterized in that: The threads on the outer wall of the threaded rod (201) are adapted to the threads on the inner wall of the cover plate (203).

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