Adjustable explosion-proof ignition gun suitable for multiple fuels

Abstract

The invention relates to the technical field of combustion equipment, in particular to an adjustable anti-explosion ignition gun suitable for multiple fuels, and the adjustable anti-explosion ignition gun comprises an anti-explosion box, a flame switch, a combustion-supporting air outer sleeve, an ignition needle, a fuel nozzle, a rotational flow air ring and a bent sleeve. The method is difficult to apply to narrow space, resulting in limited application scenarios; the problems that combustion-supporting air cannot be sprayed out in a rotational flow mode, it is difficult to ensure that fuel is fully mixed with the combustion-supporting air when the fuel is sprayed out, and uneven mixing and insufficient combustion are prone to occurring are solved. The combustion-supporting air outer sleeve can be controlled to be bent universally, so that the ignition end can conveniently extend into a narrow space for ignition operation; through the design of the mixing channel of the rotational flow air ring, rotational flow can be generated when combustion-supporting air is introduced, uniform mixed gas is rapidly formed by the rotational flow and fuel gas, the mixing efficiency is improved, and the problem that local combustion is insufficient is solved.

Description

Technical Field

[0001] This invention relates to the field of combustion equipment technology, and in particular to an adjustable explosion-proof ignition gun suitable for multiple fuels. Background Technology

[0002] With the development of industry, industrial production has placed higher demands on the reliability, adaptability and safety of combustion equipment. As the core device for igniting and maintaining the flame of the main burner, the performance of the gas ignition gun directly affects the stability and efficiency of industrial production. Existing ignition guns usually generate a high-voltage electric arc at the fuel nozzle outlet through the ignition needle of the ignition module. The fuel is ejected at high speed and mixes with the combustion air at the nozzle outlet to form a combustible mixture. The high-voltage electric arc comes into contact with the combustible mixture and instantly ignites the mixture to form a stable ignition flame.

[0003] Technicians in related fields have made numerous optimizations to the lighter. To make a more accurate comparison, Chinese Patent No. CN205299612U discloses a new type of lighter, which includes a shell and an inner core. One end of the inner core is equipped with a gas box, the head of the gas box is equipped with an inner flame adjustment ring, and the bottom of the gas box is equipped with a gas box adjustment ring. Rotating the gas box adjustment ring causes the gas box to rotate, and the gas box adjusts the gas outlet through the inner flame adjustment ring to adjust the flame size.

[0004] However, the ignition guns provided by the aforementioned existing technologies still have some shortcomings in practical use: 1. The above-mentioned ignition gun has a fixed straight cylindrical structure, and the ignition end cannot be bent. Therefore, when it needs to be used in the narrow ignition space of the combustion equipment, the straight cylindrical structure is difficult to extend into the ignition position, making the ignition operation impossible. In addition, the ignition end is fixed in direction and cannot adapt to the ignition requirements of different angles, thus limiting the application scenarios.

[0005] 2. Although the ignition gun can adjust the flame size, it cannot make the combustion air spray out in a swirling manner. Therefore, it is difficult to ensure that the fuel and combustion air are fully mixed when the fuel is sprayed out, which can easily lead to uneven mixing and incomplete combustion. As a result, the flame intensity sprayed out by the ignition gun is weak and cannot meet the ignition coverage requirements of high-power burners, thus having limitations.

[0006] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing ignition guns. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides an adjustable explosion-proof ignition gun suitable for multiple fuels, comprising: an explosion-proof box; a flame switch, installed inside the explosion-proof box, for receiving the ionization of the flame and converting it into a microamp signal, and simultaneously converting the microamp signal into a switching signal; a terminal block for energizing is installed at the bottom of the flame switch; an ignition transformer, located inside the explosion-proof box and above the flame switch, for converting voltage and generating an electric arc to ignite the mixture of fuel gas and air; and a combustion air jacket, installed at the upper end of the explosion-proof box, inside which a fuel pipe is mounted via multiple ceramic fixing brackets; and an opening on the explosion-proof box for connecting the fuel pipe... The explosion-proof box has a connected fuel inlet and an ignition air inlet connected to the combustion air jacket. An ignition needle passes through multiple ceramic mounting brackets, with a ceramic connecting rod fitted to its lower end. The lower end of the ignition needle is connected to the ignition transformer via a wire. A fuel nozzle is installed at the end of the fuel pipe furthest from the explosion-proof box. The inner wall of the combustion air jacket has an ignition ionization assembly and a swirling air ring located outside the fuel nozzle. A curved sleeve is provided between the two sections of the combustion air jacket, allowing the end furthest from the explosion-proof box to be bent for ignition in narrow spaces where direct insertion of the combustion air jacket is inconvenient.

[0008] Preferably, the bending sleeve includes a positioning cylinder, a bending cylinder, and a linkage cylinder installed sequentially between the two combustion air outer sleeves, wherein the positioning cylinder and the linkage cylinder are installed at opposite ends of the two combustion air outer sleeves, and the bending cylinder is movably disposed between the positioning cylinder and the linkage cylinder.

[0009] Preferably, a hemispherical protrusion is installed at the end of the positioning cylinder and the bending cylinder near the linkage cylinder, and a hemispherical concave ring is provided at the end of the linkage cylinder and the bending cylinder near the positioning cylinder, which slides against the outer wall of the hemispherical protrusion. An extension cylinder is provided at the end of the two hemispherical protrusions near the linkage cylinder, and an annular gap is provided between the hemispherical concave ring and the extension cylinder.

[0010] Preferably, the inner wall of the hemispherical convex cylinder on the curved cylinder is provided with a fixing ring, and multiple ring-shaped mounting seats are installed on the side of the linkage cylinder and the positioning ring near the positioning cylinder and on the outer wall of the two extension cylinders. A cylinder is provided between two corresponding mounting seats through a universal mounting bracket.

[0011] Preferably, the fuel tube and the ignition needle are both separate structures, with a high-temperature resistant corrugated tube between the two fuel tube sections and a flexible conductive core between the two ignition needle sections corresponding to the positions.

[0012] Preferably, the swirl air ring is composed of a support ring and a folded edge ring. The support ring is installed on the inner wall of the combustion air jacket pipe near the ignition end. The support ring is located outside the fuel nozzle. A folded edge ring is provided at the end of the support ring away from the explosion-proof box. Multiple mixing channels for passing fuel gas and combustion air are opened on the folded edge ring. The mixing channels are arranged in a clockwise direction on the side near the fuel nozzle. A baffle is formed between two adjacent mixing channels to block the mixed gas and force it to pass through the mixing channel.

[0013] Preferably, the end of the baffle away from the support ring is provided with two adjustment groups. Each adjustment group includes a heat-resistant expansion plate and an auxiliary plate. The auxiliary plate has the same shape as the baffle, and two heat-resistant expansion plates are symmetrically and rotatably installed on the side of the auxiliary plate near the support ring. The heat-resistant expansion plates, the auxiliary plate near the support ring, and the baffle are all rotatably connected. The combustion air jacket has multiple inclined holes corresponding to the position of the auxiliary plate. The inclined holes are inclined clockwise from bottom to top. A force-bearing rod passing through the inclined hole is provided on the side of the auxiliary plate away from the fuel nozzle. A sleeve is rotatably installed on the outer wall of the combustion air jacket. Multiple ring-shaped levers are installed on the inner wall of the sleeve. A longitudinal groove is provided on the side of the levers near the combustion air jacket. The end of the force-bearing rod away from the auxiliary plate is slidably connected in the longitudinal groove.

[0014] Preferably, a gear ring is fixedly fitted on the outer wall of the sleeve, and a drive motor is installed on the outer wall of the combustion air jacket through a motor cover. The output shaft of the drive motor is fixedly fitted with a gear that meshes with the gear ring, and a fireproof cover is fitted on the outside of the gear ring, the drive motor, and the gear. Two support rings are symmetrically arranged on the outer wall of the combustion air jacket along the sleeve. On the side of the support ring near the sleeve, multiple annularly distributed hemispherical abutment blocks are evenly installed through a support spring rod. Multiple grooves that slide against the hemispherical abutment blocks are opened at the ends of the sleeve near the two support rings.

[0015] Preferably, the fuel nozzle has a through hole in the middle that communicates with the fuel pipe, and the outer wall of the fuel nozzle has a plurality of air guide holes that communicate with the through hole, which are used to guide the fuel gas into multiple mixing channels and accelerate the mixing speed of the fuel gas and the combustion air.

[0016] Preferably, the fuel nozzle is slidably provided with multiple limiting slide rods at the end away from the fuel pipe, and the ends of the multiple limiting slide rods away from the fuel pipe are jointly provided with a guide plate. The outer wall of the guide plate is provided with an annular inclined plate, and the outer edge of the annular inclined plate is inclined to the side away from the fuel pipe. A horizontal plate is rotatably mounted on the end of the guide plate away from the fuel pipe via a connecting pin. An annular guide rail is provided at the upper end of any two opposing auxiliary plates, and a connecting block that slides and engages inside the annular guide rail is installed at the lower end of the horizontal plate.

[0017] In summary, this application includes the following beneficial technical effects: I. This invention adopts an integrated explosion-proof box design, which integrates a flame switch, ignition transformer, terminal block and ceramic connecting rod. The internal pre-wiring reduces the amount of on-site wiring work. The structure is compact and meets the explosion-proof level. There is no need to set up an additional electrical control box, which saves installation space and reduces safety hazards, and is suitable for the explosion-proof requirements of industrial sites.

[0018] Second, this invention, through the mixing channel design of the swirling air ring, in conjunction with the fuel nozzle, can quickly form a uniform mixture with the fuel gas through the swirling effect generated by the mixing channel even when a small amount of combustion air is introduced, thereby improving mixing efficiency, significantly reducing the consumption of combustion air, and improving the uniformity of mixing, thus avoiding the problem of incomplete local combustion.

[0019] Third, this invention adjusts the angle between the hemispherical convex cylinder and the hemispherical concave ring by the coordinated operation of multiple cylinders, thereby controlling the combustion air outer tube near the ignition end to bend in an adaptive universal direction. This makes it easier for the ignition end to extend into narrow spaces that are not suitable for accommodating the entire combustion air outer tube for ignition. Furthermore, the double bending of the bending cylinder and the linkage cylinder can increase the bending angle of the combustion air outer tube, thereby improving its adaptability.

[0020] Fourth, by adjusting the distance between the auxiliary plate and the baffle, this invention can increase or decrease the length of the mixing channel, thereby adjusting the swirling intensity of the mixed gas as it passes through the mixing channel. When the mixing channel is extended, the swirling intensity weakens, and the mixed gas needs a longer distance to mix with the air and complete combustion. Therefore, the flame is extended, and the mixed gas burns dispersedly, resulting in a spread-out and dispersed flame. When the mixing channel is shortened, the swirling intensity strengthens, and the mixed gas can complete combustion in a shorter distance. Therefore, the flame is shortened, and the mixed gas burns concentratedly, causing the flame to converge. This is suitable for narrow spaces or scenarios where a concentrated flame is needed for ignition. Thus, it can adapt to different ignition requirements, further improving the applicability of this invention.

[0021] Fifth, this invention can adjust the distance between the guide plate and the fuel nozzle according to the extension and shortening of the mixing channel. When the mixing channel is extended, the distance between the guide plate and the fuel nozzle is increased, so that most of the fuel gas diffuses outward from the gap between the fuel nozzle and the guide plate into the mixing channel without dispersing the combustion air with reduced swirl intensity in the mixing channel. When the mixing channel is shortened, the distance between the guide plate and the fuel nozzle is reduced, so that most of the fuel gas is ejected into the mixing channel through multiple air guide holes, ensuring that the concentration of fuel gas mixed in the swirl is sufficient to support combustion. In this way, the discharge mode of the fuel gas can be adaptively adjusted according to the adjustment of the mixing channel, ensuring that the mixing intensity of fuel gas and combustion air is maintained while ensuring that the swirl of the mixed gas is not affected. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the internal structure between the combustion-supporting air outer sleeve and the curved sleeve of the present invention.

[0025] Figure 3 This is the present invention. Figure 2 A magnified view of part A.

[0026] Figure 4 This is the present invention. Figure 2 A magnified view of section B.

[0027] Figure 5 This is a schematic diagram of the structure between the combustion air jacket and the swirl air ring of the present invention.

[0028] Figure 6 This is the present invention. Figure 5 A magnified view of a portion of point C.

[0029] Figure 7 This is the present invention. Figure 5 A magnified view of a portion of point D.

[0030] Figure 8 This is a schematic diagram of the structure between the swirl air ring and the fuel nozzle of the present invention.

[0031] Figure 9 This is the present invention. Figure 8 A magnified view of a portion at point E.

[0032] In the diagram, 1. Explosion-proof box; 2. Flame switch; 21. Terminal block; 3. Ignition transformer; 4. Combustion air jacket; 41. Ceramic mounting bracket; 42. Fuel pipe; 43. Fuel inlet; 44. Combustion air inlet; 5. Ignition needle; 51. Ceramic connecting rod; 6. Fuel nozzle; 61. Through hole; 62. Air guide hole; 63. Limiting slide bar; 64. Guide plate; 65. Annular inclined plate; 66. Horizontal plate; 67. Annular guide rail; 7. Ignition ionization assembly; 8. Swirl air ring; 81. Support ring; 82. Mixing channel; 83. Baffle; 84. [Unclear - possibly related to a specific component or component] 85. Thermal expansion plate; 86. Auxiliary plate; 87. Inclined hole; 88. Force rod; 89. Sleeve; 80. Gear ring; 81. Drive motor; 82. Gear; 83. Fireproof cover; 84. Support ring; 85. Support spring rod; 86. Hemispherical abutment block; 87. Toggle lever; 98. Bending sleeve; 98. Positioning cylinder; 99. Bending cylinder; 90. Linkage cylinder; 91. Hemispherical convex cylinder; 92. Hemispherical concave ring; 93. Extension cylinder; 94. Fixing ring; 95. Universal mounting bracket; 96. Cylinder; 100. High temperature resistant corrugated pipe; 101. Flexible conductive core. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-9 The embodiments of the present invention will be described in detail below.

[0034] This application discloses an adjustable explosion-proof ignition gun suitable for multiple fuels. It should be noted that this adjustable explosion-proof ignition gun is mainly used in the ignition and combustion process of combustion equipment. Technically, it can control the two sections of the combustion air outer sleeve 4 to bend in all directions, facilitating the ignition end to extend into narrow spaces that are difficult to accommodate the entire combustion air outer sleeve 4 for ignition. Especially during ignition, it can adjust the length of the mixing channel 82 that generates swirl, thereby adjusting the flame state according to requirements, adapting to different ignition needs, and improving the applicability of this application. Furthermore, this adjustable explosion-proof ignition gun can also adaptively adjust the exhaust method of combustion gases according to the length of the mixing channel 82, ensuring that the mixing intensity of fuel gas and combustion air is maintained while also ensuring that the swirl of the mixed gas is not affected.

[0035] Reference Figure 1 and Figure 2As shown, an adjustable explosion-proof ignition gun suitable for multiple fuels includes an explosion-proof box 1, a basic support structure for the ignition gun, and an explosion-proof standard Ex db ed II CT4 Gb, meeting the requirements for use in explosion-proof environments; a flame switch 2, installed inside the explosion-proof box 1, used to receive the ionization of the flame and convert it into a microamplitude signal, and simultaneously convert the microamplitude signal into a switching signal for DCS sequential control, safety interlocking, and centralized management of the ignition process; a terminal block 21 for energizing is installed at the bottom of the flame switch 2; an ignition transformer 3, located inside the explosion-proof box 1 and above the flame switch 2, used to convert voltage and generate an electric arc to ignite the mixture of fuel gas and air; both the flame switch 2 and the ignition transformer 3 are electrically connected to the terminal block 21; a combustion air jacket 4, installed at the upper end of the explosion-proof box 1, with a fuel pipe 42 installed inside the combustion air jacket 4 via multiple ceramic fixing brackets 41; and a fuel inlet 43 connected to the fuel pipe 42 on the explosion-proof box 1. The explosion-proof box 1 also has a combustion air inlet 44 connected to the combustion air outer sleeve 4; the ignition needle 5 passes through multiple ceramic fixing brackets 41, and the lower end of the ignition needle 5 is fitted with a ceramic connecting rod 51, and the lower end of the ignition needle 5 is connected to the ignition transformer 3 by a wire. The ceramic connecting rod 51 with electrical insulation properties can effectively isolate the ignition needle 5 from the combustion air outer sleeve 4 and the explosion-proof box 1, avoiding high voltage leakage, short circuit or breakdown, which not only ensures the effectiveness of high voltage ignition, but also meets the explosion-proof safety requirements; the explosion-proof box 1 integrates the flame switch 2, ignition transformer 3, terminal block 21 and ceramic connecting rod 51, and the internal wiring is pre-completed. On-site, only the external line needs to be connected through the G1 / 2 electrical interface, without the need for an additional electrical control box; the integrated structure is compact in size, saves installation space and reduces on-site construction and maintenance costs.

[0036] It also includes a fuel nozzle 6, installed at the end of the fuel pipe 42 away from the explosion-proof box 1. The inner wall of the combustion air outer tube 4 is provided with an ignition ionization component 7 and a swirling air ring 8 located outside the fuel nozzle 6. The ignition ionization component 7 is used to receive signals from the ignition transformer 3 and the flame switch 2 to detect the flame status. When the ignition needle 5 fails to generate an arc or ignite the flame, the ignition ionization component 7 immediately feeds back a no-flame signal. At this time, the DCS triggers an interlock to cut off the fuel gas supply. Then, fuel gas is intermittently supplied and ignition needle 5 is used to attempt ignition. If ignition fails after multiple attempts, the safety interlock directly locks the ignition function, that is, cuts off the fuel gas supply and disconnects the voltage supply to the ignition needle 5, waiting for manual troubleshooting. The swirling air ring 8 is used to make the combustion air discharged from the combustion air outer tube 4 swirl, so that the combustion air and fuel gas are mixed evenly, ensuring that ignition is easier and combustion is more complete.

[0037] Furthermore, it also includes a curved sleeve 9. The combustion air outer sleeve 4 has a split structure, and a curved sleeve 9 is provided between the two sections of the combustion air outer sleeve 4. It is used to bend the end of the combustion air outer sleeve 4 away from the explosion-proof box 1, so as to ignite the narrow space where it is not convenient to directly insert the combustion air outer sleeve 4.

[0038] In the specific implementation process, fuel gas and combustion air are discharged into fuel pipe 42 and combustion air outer sleeve 4 respectively through fuel inlet 43 and combustion air inlet 44. The fuel gas is ejected after passing through fuel pipe 42 and fuel nozzle 6, and the combustion air is discharged through combustion air outer sleeve 4 and mixed with the fuel gas. During this period, the fuel gas and combustion air generate swirl when passing through swirl air ring 8 and are uniformly mixed into a combustible mixture. At the same time, the flame switch 2 and ignition transformer 3 are powered through terminal block 21. Ignition transformer 3 steps up the 220V mains power to 6-12KV high-frequency high-voltage power. The high voltage is transmitted to the conductive core of the ignition needle 5 through the wire. The high voltage is conducted to the end of the ignition needle 5 away from the explosion-proof box 1. When the voltage reaches the air breakdown threshold, it will break down the air gap between the ignition needle 5 and the fuel nozzle 6, forming a high voltage arc. The high voltage arc has an extremely high instantaneous temperature. When it comes into contact with the mixed gas at the end of the combustion air jacket 4, it instantly ignites the mixed gas and forms a stable ignition flame. During the ignition process, the flame switch 2 detects the ionization in real time according to the ignition ionization component 7 and feeds back the switching signal to the DCS and the external PLC controller to generate a closed loop circuit to ensure stable ignition.

[0039] It should be noted that the fuel inlet 43 can be supplied with different combustible gases, and is compatible with natural gas, LPG, hydrogen-containing coke oven gas and pure hydrogen. It has a wide range of applications and, together with the flame switch 2 and ignition needle 5, supports flexible working modes of continuous or intermittent operation, which can be flexibly adjusted according to the user's process requirements.

[0040] Reference Figure 2 and Figure 3 As shown, in order to facilitate the use of the ignition gun in narrow spaces, in this embodiment, the end of the combustion air outer tube 4 away from the explosion-proof box 1 can be bent by the bending sleeve 9. Specifically, the bending sleeve 9 includes a positioning cylinder 91, a bending cylinder 92 and a linkage cylinder 93 installed sequentially between the two sections of the combustion air outer tube 4. The positioning cylinder 91 and the linkage cylinder 93 are installed at opposite ends of the two sections of the combustion air outer tube 4, and the bending cylinder 92 is movably disposed between the positioning cylinder 91 and the linkage cylinder 93.

[0041] Furthermore, in this embodiment, a hemispherical protrusion 94 is installed at one end of the positioning cylinder 91 and the bending cylinder 92 near the linkage cylinder 93. A hemispherical concave ring 95 is provided at one end of the linkage cylinder 93 and the bending cylinder 92 near the positioning cylinder 91, which slides against the outer wall of the hemispherical protrusion 94. An extension cylinder 96 is provided at one end of the two hemispherical protrusions 94 near the linkage cylinder 93. There is an annular gap between the hemispherical concave ring 95 and the extension cylinder 96. This annular gap is the limit angle for the hemispherical concave ring 95 to be adjusted universally along the hemispherical protrusion 94, that is, the limit angle for bending when the hemispherical concave ring 95 abuts against the extension cylinder 96.

[0042] Furthermore, in this embodiment, a fixing ring 97 is provided on the inner wall of the hemispherical protrusion 94 on the bending cylinder 92. Multiple annularly distributed mounting seats are installed on the side of the linkage cylinder 93 and the positioning ring near the positioning cylinder 91, as well as on the outer walls of the two extension cylinders 96. A cylinder 99 is provided between two corresponding mounting seats through a universal mounting bracket 98. The cylinder 99 can limit the adjacent hemispherical protrusion 94 and hemispherical concave ring 95 to ensure that they can fit tightly and will not detach.

[0043] It should be further explained that, in order to facilitate the adaptive bending of the fuel pipe 42 and the ignition needle 5 in conjunction with the two bent combustion air outer casing 4, in this embodiment, both the fuel pipe 42 and the ignition needle 5 are of a split structure. A high-temperature resistant corrugated pipe 100 is provided between the two sections of the fuel pipe 42 to facilitate the transmission of fuel gas in conjunction with the two bent sections of the fuel pipe 42. A flexible conductive core 101 is provided between the two corresponding sections of the ignition needle 5 to facilitate the transmission of high voltage electricity in conjunction with the two bent sections of the ignition needle 5. In addition, multiple cylinders 99 are electrically connected to an external controller. The controller is existing technology and is used to control the energization and de-energization of the cylinders 99 upon receiving the request.

[0044] In practical implementation, when the present invention needs to be used in a confined space, the controller transmits signals to multiple cylinders 99. The telescopic ends of the cylinders 99 extend and retract, causing the hemispherical convex cylinder 94 and the hemispherical concave ring 95 to adjust the angle. During this period, multiple cylinders 99 work together to adjust the angle while ensuring that the hemispherical convex cylinder 94 and the hemispherical concave ring 95 remain in contact. When adjusting the angle, the positioning cylinder 91 is kept fixed by the combustion air outer sleeve 4 connected to the explosion-proof box 1. Therefore, the cylinders 99 can drive the bending cylinder 92 and the linkage cylinder 93 to tilt towards the side closer to the telescopic end of the cylinder 99. Specifically, the cylinder 99 on the side closer to the bending direction of the bending cylinder 92 and the linkage cylinder 93 retracts, while the other cylinder 99... The side cylinder 99 extends, while other cylinders 99 adaptively extend and retract. Through the sliding engagement of the hemispherical convex cylinder 94 and the hemispherical concave ring 95, the directional bending of the combustion air outer tube 4 is achieved. The differentiated extension and retraction of multiple cylinders 99 can cover 360° universal adjustment. The bending angle is limited by the annular gap between the hemispherical convex cylinder 94 and the hemispherical concave ring 95, which facilitates the ignition end to extend into narrow spaces that are not suitable for accommodating the entire combustion air outer tube 4 for ignition operations. In addition, the double bending of the bending cylinder 92 and the linkage cylinder 93 can increase the bending angle of the combustion air outer tube 4, thereby improving the adaptability. When the bending cylinder 92 and the linkage cylinder 93 are tilted, the high-temperature resistant corrugated pipe 100 and the flexible conductive core 101 adaptively bend to ensure rationality.

[0045] Reference Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, since different ignition operations require different flame shapes, the swirl ring 8 is modified accordingly in this embodiment. Specifically, the swirl ring 8 consists of a support ring 81 and a folded edge ring. The support ring 81 is installed on the inner wall of the combustion air jacket 4 near the ignition end. The support ring 81 is located outside the fuel nozzle 6. A folded edge ring is provided at the end of the support ring 81 away from the explosion-proof box 1. The upper end of the folded edge ring is bent towards the side near the fuel nozzle 6. Multiple mixing channels 82 for passing fuel gas and combustion air are provided on the folded edge ring. The mixing channels 82 are arranged clockwise on the side near the fuel nozzle 6. A baffle 83 is formed between two adjacent mixing channels 82. The clockwise arrangement of the mixing channels 82 can force the combustion air to form a high-speed swirl when passing through the mixing channels 82, and quickly mix with the fuel gas ejected from the fuel nozzle 6. Even if the combustion air flow rate is as low as 50 Nm³ / hr, the mixing effect can still be guaranteed, significantly reducing the consumption of combustion air, and improving the mixing uniformity, avoiding the problem of incomplete local combustion.

[0046] Furthermore, in this embodiment, two adjustment groups are provided at the end of the baffle 83 away from the support ring 81. Each adjustment group includes a heat-resistant expansion plate 84 and an auxiliary plate 85. The auxiliary plate 85 has the same shape as the baffle 83, and two heat-resistant expansion plates 84 are symmetrically and rotatably mounted on the side of the auxiliary plate 85 near the support ring 81. The heat-resistant expansion plates 84, the auxiliary plate 85 near the support ring 81, and the baffle 83 are all rotatably connected. A mixing channel 82 is also formed between two adjacent adjustment groups. This mixing channel 82 interacts with the mixing channel on the folded edge ring. Channel 82 is connected; multiple inclined holes 86 corresponding to the positions of auxiliary plate 85 are opened on the combustion air outer tube 4. The inclined holes 86 are inclined in a clockwise direction from bottom to top. A force rod 87 passing through the inclined hole 86 is provided on the side of the auxiliary plate 85 away from the fuel nozzle 6. A sleeve 88 is rotatably installed on the outer wall of the combustion air outer tube 4. Multiple ring-shaped levers 89 are installed on the inner wall of the sleeve 88. A longitudinal groove is opened on the side of the lever 89 near the combustion air outer tube 4. The end of the force rod 87 away from the auxiliary plate 85 is slidably connected in the longitudinal groove.

[0047] In the specific implementation process, the control sleeve 88 rotates, and the sleeve 88 drives multiple levers 89 on its inner wall to move synchronously in the circumferential direction. The levers 89 apply driving force to the force rod 87, causing the force rod 87 to move along the inclined hole 86 under the driving action of the longitudinal slide groove. The force rod 87 drives the auxiliary plate 85 to move synchronously, thereby adjusting the distance between the auxiliary plate 85 and the baffle 83. During this period, the heat-resistant expansion plate 84 adaptively expands and contracts, and adaptively tilts according to the tilting movement of the auxiliary plate 85. In addition, the moving direction of the auxiliary plate 85 is consistent with the direction of the mixed gas discharged in the mixing channel 82, so as to ensure that the flatness and arrangement direction of the mixing channel 82 remain unchanged, and ensure that the mixed gas can pass through the mixing channel 82 smoothly. Therefore, when adjusting the distance between the auxiliary plate 85 and the baffle 83, the length of the mixing channel 82 can be increased or decreased, thereby adjusting the swirling intensity of the mixed gas when passing through the mixing channel 82. Specifically, the mixing... When the mixing channel 82 is extended, the flow rate of the combustion air passing through the mixing channel 82 decreases, the swirling intensity weakens, and the mixing speed of the fuel gas and the combustion air slows down. After the mixed gas is ejected, it needs to travel a longer distance to mix with the air and complete combustion. Therefore, the flame is extended, and the mixed gas burns in a dispersed manner, resulting in a spread-out and dispersed flame, which is suitable for scenarios where the ignition coverage area needs to be expanded. When the mixing channel 82 is extended, the flame length can reach 600mm, meeting the ignition coverage requirements of high-power burners. When the mixing channel 82 is shortened, the swirling intensity increases, and the flow rate of the combustion air increases, thereby enhancing the swirling intensity, mixing intensity, and uniformity of the fuel gas and the combustion air. Therefore, the mixed gas can complete combustion in a shorter distance after being ejected, resulting in a shorter flame and concentrated combustion of the mixed gas, causing the flame to converge. When the mixing channel 82 is shortened, the flame length can reach 400mm, which is suitable for scenarios where narrow spaces or concentrated flames are required for ignition.

[0048] In summary, by adjusting the length of the mixing channel 82, the mixing intensity of the combustion gas and the combustion-supporting air can be adjusted, thereby adapting to different ignition requirements and further improving the applicability of the present invention.

[0049] Continue to refer to Figure 5 and Figure 6 As shown, in order to facilitate the automatic adjustment of the swirl fan ring 8, in this embodiment, a gear ring 881 is fixedly sleeved on the outer wall of the sleeve 88, and a drive motor 882 is installed on the outer wall of the combustion air outer tube 4 through a motor cover. The drive motor 882 is electrically connected to an external controller. A gear 883 that meshes with the gear ring 881 is fixedly sleeved on the output shaft of the drive motor 882. A fireproof cover 884 is installed on the outer side of the gear ring 881, the drive motor 882 and the gear 883. Two support rings 885 are symmetrically arranged on the outer wall of the combustion air outer tube 4 along the sleeve 88. Multiple annularly distributed hemispherical abutment blocks 887 are evenly installed on the side of the support ring 885 near the sleeve 88 through a support spring rod 886. Multiple grooves that slide against the hemispherical abutment blocks 887 are opened at the ends of the sleeve 88 near the two support rings 885.

[0050] In the specific implementation process, the drive motor 882 is powered on and started by an external controller. When the drive motor 882 rotates forward, the gear 883 drives the gear ring 881 and the sleeve 88 to rotate clockwise. The sleeve 88 drives the lever 89 to push the force rod 87 to move along the inclined hole 86 through the longitudinal slide groove. The auxiliary plate 85 moves away from the baffle 83, and the mixing channel 82 is extended. When the drive motor 882 rotates in reverse, the lever 89 pulls the force rod 87 to move in the opposite direction. The auxiliary plate 85 moves closer to the baffle 83, and the mixing channel 82 is shortened. Thus, the flame length is adaptively adjusted according to the extension and shortening of the mixing channel 82.

[0051] It should be further explained that the support spring rod 886 always applies a driving force to the hemispherical abutment block 887 pointing towards the sleeve 88. When the hemispherical abutment block 887 coincides with the groove, it abuts against the groove under the action of the support spring rod 886. In this way, the sleeve 88 can be limited after rotation through the cooperation between the hemispherical abutment block 887 and the groove, thereby preventing the sleeve 88 from moving arbitrarily through the lever 89 to drive the force rod 87. Thus, the length of the mixing channel 82 is limited and fixed by limiting the force rod 87, and the flame shape after adjustment is not changed arbitrarily.

[0052] Reference Figure 8 and Figure 9As shown, in order to facilitate the full mixing of fuel gas and combustion air, in this embodiment, a through hole 61 connected to the fuel pipe 42 is provided in the middle of the fuel nozzle 6, and a plurality of air guide holes 62 connected to the through hole 61 are uniformly provided on the outer wall of the fuel nozzle 6 to guide the fuel gas into the plurality of mixing channels 82, thereby accelerating the mixing speed of fuel gas and combustion air. The fuel gas and combustion air are mixed outside the fuel nozzle 6, and there is no premixing chamber inside the fuel nozzle 6 to avoid backfire during ignition and improve safety.

[0053] Furthermore, in this embodiment, a plurality of limiting slide rods 63 are slidably provided at the end of the fuel nozzle 6 away from the fuel pipe 42, and a guide plate 64 is provided at the end of the plurality of limiting slide rods 63 away from the fuel pipe 42. An annular inclined plate 65 is provided on the outer wall of the guide plate 64, and the outer edge of the annular inclined plate 65 is inclined to the side away from the fuel pipe 42. A horizontal plate 66 is rotatably installed at the end of the guide plate 64 away from the fuel pipe 42 through a connecting pin. An annular guide rail 67 is provided at the upper end of any two opposing auxiliary plates 85, and a connecting block that slides and engages with the inside of the annular guide rail 67 is installed at the lower end of the horizontal plate 66.

[0054] In the specific implementation process, the fuel gas is discharged through the fuel pipe 42 into the through hole 61, and then discharged through the through hole 61 and multiple air guide holes 62. When the mixing channel 82 is extended, the auxiliary plate 85 drives the guide plate 64 to move synchronously through the annular guide rail 67 and the horizontal plate 66. The distance between the guide plate 64 and the fuel nozzle 6 increases, so that most of the fuel gas in the through hole 61 is discharged from the gap between the fuel nozzle 6 and the guide plate 64. Then, under the guidance of the annular inclined plate 65, the fuel gas diffuses to the outside into the multiple extended mixing channels 82 and mixes with the combustion air. Since the mixing channel 82 is extended and the speed of the combustion air passing through the mixing channel 82 is reduced, the swirl intensity is reduced. The fuel gas adopts a diffusion method and will not disperse the combustion air in the mixing channel 82, avoiding excessive fuel gas that would destroy the swirl of the combustion air, thereby ensuring that the fuel gas and the combustion air are fully mixed during the swirl process.

[0055] When the mixing channel 82 is shortened, the auxiliary plate 85 drives the guide plate 64 to move closer to one side of the fuel nozzle 6 via the horizontal plate 66, thereby reducing the distance between the guide plate 64 and the fuel nozzle 6. Most of the fuel gas in the through hole 61 is ejected to the outside through multiple air guide holes 62 into the shortened mixing channel 82. At this time, the speed and swirling intensity of the combustion air passing through the mixing channel 82 increase. Therefore, the ejected fuel gas will not disrupt the swirling flow. Instead, it can ensure that the concentration of fuel gas mixed in the swirling flow is sufficient to support combustion. In this way, the discharge mode of the fuel gas can be adaptively adjusted according to the adjustment of the mixing channel 82, ensuring that the mixing intensity of the fuel gas and the combustion air can be guaranteed while also ensuring that the swirling flow of the mixed gas is not affected.

[0056] During operation: Step 1: Fuel gas and combustion air are discharged into fuel pipe 42 and combustion air outer sleeve 4 through fuel inlet 43 and combustion air inlet 44 respectively. Fuel gas is ejected after passing through fuel pipe 42 and fuel nozzle 6. Combustion air is discharged through combustion air outer sleeve 4 and mixed with fuel gas. When fuel gas and combustion air pass through swirl ring 8, they generate swirl and are evenly mixed into combustible mixture.

[0057] The flame switch 2 and ignition transformer 3 are powered through the terminal block 21. The ignition transformer 3 boosts the 220V mains power to a high-frequency high-voltage power of 6-12KV, which is then transmitted to the conductive core of the ignition needle 5 through the wire. The high voltage breaks down the air gap between the ignition needle 5 and the fuel nozzle 6, forming a high-voltage arc. When the high-voltage arc comes into contact with the mixed gas at the end of the combustion air jacket 4, it instantly ignites the mixed gas and forms a stable ignition flame.

[0058] Step 2: When used in confined spaces, the controller transmits signals to multiple cylinders 99, which work together to adjust the angle between them while ensuring that the hemispherical protrusion 94 and the hemispherical concave ring 95 remain in contact. At the same time, the positioning cylinder 91 is fixed by the combustion air outer tube 4 connected to the explosion-proof box 1. Therefore, the cylinder 99 can drive the bending cylinder 92 and the linkage cylinder 93 to tilt towards the side where the cylinder 99 retracts. The other cylinders 99 control their retracting ends to extend and retract adaptively, thereby controlling the combustion air outer tube 4 near the ignition end to bend adaptively in all directions, so that the ignition end can be inserted into a narrow space that is not suitable for accommodating the entire combustion air outer tube 4 for ignition.

[0059] Step 3: Power on and start the drive motor 882 via an external controller. When the drive motor 882 rotates forward, the gear 883 drives the gear ring 881 and the sleeve 88 to rotate clockwise. The sleeve 88 drives the lever 89 to push the force rod 87 along the inclined hole 86 through the longitudinal slide groove. The auxiliary plate 85 moves away from the baffle 83, and the mixing channel 82 is extended. When the drive motor 882 rotates in reverse, the lever 89 pulls the force rod 87 to move in the opposite direction. The auxiliary plate 85 moves closer to the baffle 83, and the mixing channel 82 is shortened. Thus, the flame length is adaptively adjusted according to the extension and shortening of the mixing channel 82.

[0060] When the mixing channel 82 is extended, the flow rate of the combustion air passing through the mixing channel 82 decreases, the swirling intensity weakens, and the mixing speed of the fuel gas and the combustion air slows down. After the mixed gas is ejected, it needs to travel a longer distance to mix with the air and complete combustion. Therefore, the flame is extended, and the mixed gas burns in a dispersed manner, with the flame appearing stretched and dispersed, which is suitable for scenarios where the ignition coverage area needs to be expanded. When the mixing channel 82 is shortened, the swirling intensity increases, and the flow rate of the combustion air increases, thereby enhancing the swirling intensity, mixing intensity, and uniformity of the fuel gas and the combustion air. Therefore, the mixed gas can complete combustion in a shorter distance after being ejected. As a result, the flame is shortened, and the mixed gas burns in a concentrated manner, causing the flame to converge. This is suitable for scenarios where there are narrow spaces or where a concentrated flame is needed for ignition.

[0061] Step 4: When the mixing channel 82 is extended, the auxiliary plate 85 drives the guide plate 64 to move synchronously through the annular guide rail 67 and the horizontal plate 66. The distance between the guide plate 64 and the fuel nozzle 6 increases, so that most of the fuel gas in the through hole 61 diffuses outward from the gap between the fuel nozzle 6 and the guide plate 64 into the mixing channel 82 to mix with the combustion air. The fuel gas diffuses and does not disperse the combustion air in the mixing channel 82, ensuring that the fuel gas and the combustion air are fully mixed during the swirling process.

[0062] When the mixing channel 82 is shortened, the auxiliary plate 85 drives the guide plate 64 to move closer to one side of the fuel nozzle 6 via the horizontal plate 66, thereby reducing the distance between the guide plate 64 and the fuel nozzle 6. Most of the fuel gas in the through hole 61 is ejected to the outside through multiple air guide holes 62 into the shortened mixing channel 82. The ejected fuel gas will not disrupt the swirl, but will instead ensure that the concentration of fuel gas mixed in the swirl is sufficient to support combustion. This ensures that the mixing strength of the fuel gas and the combustion air is maintained while also ensuring that the swirl of the mixed gas is not affected.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable explosion-proof ignition gun suitable for multiple fuels, characterized in that, include: Explosion-proof box (1); The flame switch (2) is installed inside the explosion-proof box (1) to receive the ionization of the flame and convert it into a microamp signal. At the same time, the microamp signal is converted into a switching signal. The bottom of the flame switch (2) is equipped with a terminal block (21) for power supply. Ignition transformer (3) is installed inside explosion-proof box (1) and above flame switch (2) to convert voltage and generate an electric arc to ignite the mixture of fuel gas and air. The combustion air jacket (4) is installed on the upper end of the explosion-proof box (1). The combustion air jacket (4) is equipped with a fuel pipe (42) through multiple ceramic fixing brackets (41). The explosion-proof box (1) is provided with a fuel inlet (43) connected to the fuel pipe (42). The explosion-proof box (1) is also provided with a combustion air inlet (44) connected to the combustion air jacket (4). The ignition needle (5) passes through multiple ceramic fixing brackets (41), and a ceramic connecting rod (51) is sleeved on the lower end of the ignition needle (5). The lower end of the ignition needle (5) is connected to the ignition transformer (3) through a wire. The fuel nozzle (6) is installed at the end of the fuel pipe (42) away from the explosion-proof box (1). The inner wall of the combustion air jacket pipe (4) is provided with an ignition ionization assembly (7) and a swirl air ring (8) located outside the fuel nozzle (6). The curved sleeve (9) and the combustion air outer sleeve (4) are a split structure. A curved sleeve (9) is provided between the two sections of the combustion air outer sleeve (4) to bend the end of the combustion air outer sleeve (4) away from the explosion-proof box (1) and ignite the narrow space where it is not convenient to directly insert the combustion air outer sleeve (4).

2. The adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 1, characterized in that: The curved sleeve (9) includes a positioning cylinder (91), a curved cylinder (92) and a linkage cylinder (93) installed sequentially between two sections of combustion air outer sleeve (4). The positioning cylinder (91) and the linkage cylinder (93) are installed at opposite ends of the two sections of combustion air outer sleeve (4), and the curved cylinder (92) is movably disposed between the positioning cylinder (91) and the linkage cylinder (93).

3. The adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 2, characterized in that: The positioning cylinder (91) and the bending cylinder (92) are each equipped with a hemispherical protrusion (94) at one end near the linkage cylinder (93). The linkage cylinder (93) and the bending cylinder (92) are each provided with a hemispherical concave ring (95) that slides against the outer wall of the hemispherical protrusion (94) at one end near the positioning cylinder (91). The two hemispherical protrusions (94) are each provided with an extension cylinder (96) at one end near the linkage cylinder (93). There is an annular gap between the hemispherical concave ring (95) and the extension cylinder (96).

4. The adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 3, characterized in that: A fixing ring (97) is provided on the inner wall of the hemispherical protrusion (94) on the curved cylinder (92). Multiple ring-shaped mounting seats are installed on the side of the linkage cylinder (93) and the positioning ring near the positioning cylinder (91) and the outer walls of the two extension cylinders (96). A cylinder (99) is provided between two corresponding mounting seats through a universal mounting bracket (98).

5. An adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 1, characterized in that: The fuel tube (42) and the ignition needle (5) are both split structures. A high-temperature resistant corrugated tube (100) is provided between the two fuel tubes (42), and a flexible conductive core (101) is provided between the two ignition needles (5) at the corresponding positions.

6. The adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 1, characterized in that: The swirling air ring (8) consists of a support ring (81) and a folded edge ring. The support ring (81) is installed on the inner wall of the combustion air jacket (4) near the ignition end. The support ring (81) is located outside the fuel nozzle (6). A folded edge ring is provided at the end of the support ring (81) away from the explosion-proof box (1). Multiple mixing channels (82) for passing fuel gas and combustion air are provided on the folded edge ring. The mixing channels (82) are arranged in a clockwise direction on the side near the fuel nozzle (6). A baffle (83) is formed between two adjacent mixing channels (82) to block the mixed gas and force it to pass through the mixing channel (82).

7. An adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 6, characterized in that: Two adjustment groups are provided at the end of the baffle (83) away from the support ring (81). Each adjustment group includes a heat-resistant expansion plate (84) and an auxiliary plate (85). The auxiliary plate (85) has the same shape as the baffle (83). Two heat-resistant expansion plates (84) are symmetrically and rotatably installed on the side of the auxiliary plate (85) near the support ring (81). The heat-resistant expansion plate (84) and the auxiliary plate (85) and the baffle (83) near the support ring (81) are rotatably connected. The combustion air jacket tube (4) is provided with multiple inclined holes (86) corresponding to the position of the auxiliary plate (85). The inclined holes (86) are inclined clockwise from bottom to top. The auxiliary plate (85) is provided with a force rod (87) passing through the inclined hole (86) on the side away from the fuel nozzle (6). A sleeve (88) is rotatably installed on the outer wall of the combustion air jacket tube (4). Multiple ring-shaped levers (89) are installed on the inner wall of the sleeve (88). A longitudinal groove is provided on the side of the lever (89) near the combustion air jacket tube (4). The end of the force rod (87) away from the auxiliary plate (85) is slidably connected in the longitudinal groove.

8. An adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 7, characterized in that: A gear ring (881) is fixedly sleeved on the outer wall of the sleeve (88), and a drive motor (882) is installed on the outer wall of the combustion air outer sleeve (4) through a motor cover. A gear (883) that meshes with the gear ring (881) is fixedly sleeved on the output shaft of the drive motor (882). A fireproof cover (884) is installed on the outside of the gear ring (881), the drive motor (882) and the gear (883). The outer wall of the combustion air jacket (4) is symmetrically provided with two support rings (885) along the sleeve (88). On the side of the support ring (885) near the sleeve (88), multiple hemispherical abutment blocks (887) are evenly installed through the support spring rod (886). Multiple grooves are opened at the ends of the sleeve (88) near the two support rings (885) to slide against the hemispherical abutment blocks (887).

9. An adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 1, characterized in that: The fuel nozzle (6) has a through hole (61) in the middle that is connected to the fuel pipe (42). The outer wall of the fuel nozzle (6) has a plurality of air guide holes (62) that are connected to the through hole (61) to guide the fuel gas into the plurality of mixing channels (82) and accelerate the mixing speed of the fuel gas and the combustion air.

10. An adjustable explosion-proof ignition gun suitable for multiple fuels according to claim 9, characterized in that: The fuel nozzle (6) is slidably provided with multiple limiting slide rods (63) at one end away from the fuel pipe (42). The ends of the multiple limiting slide rods (63) away from the fuel pipe (42) are provided with a guide plate (64). The outer wall of the guide plate (64) is provided with an annular inclined plate (65). The outer edge of the annular inclined plate (65) is inclined to the side away from the fuel pipe (42). A horizontal plate (66) is rotatably mounted on the end of the guide plate (64) away from the fuel pipe (42) via a connecting pin. An annular guide rail (67) is provided on the upper end of any two opposing auxiliary plates (85), and a connecting block that slides and docks inside the annular guide rail (67) is installed on the lower end of the horizontal plate (66).

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