A burner with adjustable flame

Abstract

The present application relates to the technical field of burner, and discloses a burner with adjustable flame, which comprises a burner air inlet section and a gas pipe, wherein the burner air inlet section and the gas pipe are coaxially arranged; the burner air inlet section is coaxially arranged with a peripheral air pipe and a flame hood in sequence; the peripheral diameter of the flame hood is smaller than the inner diameter of the peripheral air pipe, and the flame hood can slide in the peripheral air pipe; the burner further comprises an adjusting device connected with the flame hood and used for adjusting the relative position of the flame hood and the peripheral air pipe. By adjusting the position of the flame hood, the present application realizes the proportioning of secondary air, the relative position of the burner nozzle and the outlet of the flame hood, and the change of the flame form, so as to adapt to the reasonable air distribution under different working conditions and enhance the adaptability to different furnaces. The present application greatly reduces the operation time of on-site technicians and after-sales personnel, improves the timeliness of the whole burner debugging period, and thus reduces the waste of personnel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of burners, and particularly relates to a burner capable of adjusting flame. BACKGROUND

[0002] The gas burner has the advantages of safety, high efficiency and simple operation, and is a core equipment for providing heat energy for an industrial boiler, and a burner combustion head is a key core component of the entire burner, which has the function of mixing fuel gas and combustion air and organizing combustion, and the structural type of the component determines the reliability and stability of the combustion process, and the velocity and temperature distribution of the entire combustion region, which are key factors affecting flue gas emission.

[0003] The type of a boiler or a heating furnace is affected by use conditions and application functions, and the type and hearth type are different, and the process structures of different manufacturers are also different, and commonly used are single return, double return, triple return and various smoke path types, and even the heating furnaces of one manufacturer have vacuum phase change furnaces, water jacket furnaces, fire tube furnaces and the like. The heat exchange types and radiation sections of such a large number of types of hearths are inconsistent, which leads to the need to match various types of burners. However, the flame shape of the existing burner is unchanged during operation, and the use of the same burner on different furnaces is limited, resulting in different use effects.

[0004] The patent CN 204829918 U proposes a secondary air adjusting device, which adjusts the distance between the flame stabilizing disc and the adjusting cylinder to realize the secondary air ratio. This adjusting method solves the problem of reasonable air distribution under different working conditions, but does not give the specific adjusting mechanism, and the adjusting effect on the flame shape is limited.

[0005] Therefore, a flame collecting cover structure capable of adjusting the burner head is needed to realize dynamic adjustment of the flame shape. SUMMARY

[0006] The purpose of the present application is to provide a burner capable of adjusting flame, which solves the problem that the flame shape of the burner cannot be changed during operation in the prior art, and cannot adapt to various hearths.

[0007] To achieve the above technical purpose, the technical scheme adopted by the present application is as follows:

[0008] A burner capable of adjusting flame, comprising a burner comprising a burner air inlet section and a gas pipe, the burner air inlet section and the gas pipe are coaxially arranged:

[0009] The burner air inlet section is coaxially provided with a peripheral air tube and a fire cover in sequence; the peripheral diameter of the fire cover is smaller than the inner diameter of the peripheral air tube, and the fire cover is slidable in the peripheral air tube; the burner further comprises an adjusting device connected with the fire cover for adjusting the relative position of the fire cover and the peripheral air tube.

[0010] Further, a gear shaft mounting seat is mounted on the burner air inlet section; the gear shaft mounting seat is provided with a gear shaft hole; the axis of the gear shaft hole is perpendicular to the axis of the burner air inlet section; the adjusting device comprises an electric servo, a coupling, an adjusting gear shaft and a gear shaft bearing arranged in sequence from top to bottom; the electric servo comprises an electric servo rotating shaft; the adjusting gear shaft is provided with an adjusting gear at the end away from the coupling; the other end of the adjusting gear shaft passes through the gear shaft hole, the gear shaft bearing and the coupling in sequence; the adjusting gear shaft and the gear shaft hole are in clearance fit; the electric servo rotating shaft and the adjusting gear shaft are sleeved in the coupling to realize coaxial and same-frequency rotation;

[0011] The fire cover comprises a gear strip pull rod and a fire cover body; one end of the gear strip pull rod is connected with the fire cover body, and the other end of the gear strip pull rod is matched with the adjusting gear.

[0012] Further, the end of the gear strip pull rod close to the adjusting gear is provided with a gear strip, and the gear strip can be matched and linked with the adjusting gear.

[0013] Further, the middle part of the gear strip pull rod is further provided with a gear strip sliding rail; the middle part of the gear strip pull rod is sleeved in the gear strip sliding rail, and the gear strip pull rod and the gear strip sliding rail are in clearance fit.

[0014] Further, the end of the peripheral air tube is uniformly provided with a peripheral air tube limiting groove; the fire cover body is uniformly provided with a fire cover limiting block at the position corresponding to the peripheral air tube limiting groove; the fire cover limiting block is located in the peripheral air tube limiting groove, and the two are in clearance fit.

[0015] Further, the fire cover further comprises a fire cover contraction section; the fire cover contraction section is arranged at the end of the fire cover away from the peripheral air tube; the hole diameter of the end of the fire cover contraction section close to the fire cover is larger than the hole diameter of the end of the fire cover contraction section away from the fire cover; the hole diameter of the fire cover contraction section gradually changes.

[0016] Further, a flame stabilizing disc is mounted on the gas pipe; the flame stabilizing disc is located at the gas outlet end of the fire cover; the flame stabilizing disc is provided with a flame stabilizing disc conical expansion section.

[0017] Further, the flame stabilizing disc is provided with a cyclone device.

[0018] Further, the adjusting gear shaft is provided with a pointer, and the pointer is located between the coupling and the gear shaft bearing; the gear shaft mounting seat is provided with a scale disc, and the scale disc is located in the direction indicated by the pointer.

[0019] Further, the electric servo is externally connected with the burner controller, and the burner controller is internally provided with a position database of the firebox corresponding to different sizes of the firebox cover, so that the position of the firebox cover can be adjusted according to the size of the firebox.

[0020] The application adopting the technical scheme has the following advantages:

[0021] (1) The position of the firebox cover can be adjusted, and the flame shape can be adjusted;

[0022] (2) The adaptability of the burner to different types of the firebox is improved;

[0023] (3) The secondary air ratio can be adjusted, and the mixture of the gas and the air is improved, so that the emission is reduced;

[0024] (4) The time for the on-site technical personnel and the after-sales personnel to operate is greatly reduced, the time efficiency of the whole burner debugging period is improved, and the waste of personnel is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application can be further illustrated by the non-limiting embodiments shown in the drawings;

[0026] Fig. 1 Fig. 1 is a structural schematic view of the automatic flame adjusting burner of the application;

[0027] Fig. 2 Fig. 2 is a perspective view of the automatic flame adjusting burner of the application;

[0028] Fig. 3 Fig. 3 is a partial schematic view of the adjusting gear and the gear strip pull rod in the automatic flame adjusting burner of the application.

[0029] The main element symbols are explained as follows:

[0030] The burner air inlet section 1; the gear shaft mounting seat 11; the gear shaft hole 12; the scale disc 13; the mounting flange 2; the peripheral air pipe 3; the peripheral air pipe limiting groove 31; the firebox cover 4; the firebox cover limiting block 41; the firebox cover contraction section 42; the adjusting gear 5; the adjusting gear shaft 51; the pointer 52; the gear strip 6; the gear strip pull rod 61; the gear strip slide rail 62; the electric servo 7; the electric servo rotating shaft 71; the coupling 72; the gear shaft bearing 73; the gas pipe 8; the flame stabilizing disc 81; the flame stabilizing disc conical expansion section 82; the burner controller 9. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0032] like Figs. 1-3 As shown, an adjustable flame burner includes a burner air inlet section 1 and a gas pipe 8, wherein the burner air inlet section 1 and the gas pipe 8 are coaxially arranged.

[0033] The burner air inlet section 1 is coaxially arranged with an outer air pipe 3 and a flame hood 4. A mounting flange 2 is provided at the connection between the outer air pipe 3 and the burner air inlet section 1. This flange facilitates the installation of the burner into the combustion chamber and also allows for easy disassembly and maintenance. The outer diameter of the flame hood 4 is smaller than the inner diameter of the outer air pipe 3. The flame hood 4 is partially disposed within the outer air pipe 3 and can slide within it. The burner also includes an adjustment device connected to the flame hood 4, used to adjust the relative position of the flame hood 4 and the outer air pipe 3, thereby changing the shape of the combustion flame. This adjustment device can be a manual adjustment device, using tools to manually rotate or move the flame hood 4 to adjust its position and angle to control the flame shape. It can also be a hydraulic or pneumatic adjustment device, using a hydraulic or pneumatic system to adjust the position and angle of the flame hood 4 to control the flame shape. Alternatively, it can be an electric adjustment device, using a motor and control system to automatically adjust the position and angle of the flame hood 4, thereby controlling the flame shape.

[0034] In operation, gas pipe 8 supplies gas to the burner, while the burner air inlet section 1 and peripheral air pipe 3 supply air to the burner. Finally, the gas and air mix and burn within the flame diffuser 4. The flame diffuser 4 is a crucial component of the burner, influencing its combustion efficiency and flame shape. When the flame diffuser 4 is close to the burner head, the combustion gases burn within a smaller space, producing a more concentrated flame; conversely, when the flame diffuser 4 is far from the burner head, the combustion gases burn within a larger space, producing a more diffuse flame. Therefore, adjusting the position of the flame diffuser 4 allows control over the flame shape and size.

[0035] Compared with the prior art, the flame shape of the designed burner can be adjusted: by adjusting the relative position of the flame hood 4 and the peripheral air pipe 3, the shape of the combustion flame can be changed, the flame can be adjusted, and different combustion requirements can be met. Simple operation: the adjusting device of the burner is connected with the flame hood 4, which can be easily adjusted without professional skills. Easy installation and maintenance: the mounting flange 2 of the burner facilitates the installation of the burner into the combustion furnace, and also facilitates the disassembly and maintenance. High combustion efficiency: by adjusting the flame shape, the combustion can be more complete, and the combustion efficiency can be improved. Wide application range: the burner can be applied to various industrial combustion equipment, such as boilers and industrial furnaces, and has high applicability.

[0036] In some embodiments, a gear shaft mounting seat 11 is installed on the burner air inlet section 1; a gear shaft hole 12 is formed in the center position of the gear shaft mounting seat 11; the gear shaft hole 12 is used for the adjusting gear shaft 51 to pass through, and the axis of the gear shaft hole 12 is perpendicular to the axis of the burner air inlet section 1; the adjusting device comprises, from top to bottom, an electric servo 7, a shaft coupling 72, an adjusting gear shaft 51 and a gear shaft bearing 73; the electric servo 7 comprises an electric servo shaft 71; the adjusting gear shaft 51 is provided with an adjusting gear 5 at the end away from the shaft coupling 72, and the other end passes through the gear shaft hole 12, the gear shaft bearing 73 and the shaft coupling 72 in sequence; the adjusting gear shaft 51 and the gear shaft hole 12 are clearance fit; the electric servo shaft 71 and the adjusting gear shaft 51 are sleeved in the shaft coupling 72 to realize coaxial and same-frequency rotation.

[0037] The flame hood 4 comprises a gear strip pull rod 61 and a flame hood 4 body; one end of the gear strip pull rod 61 is connected with the flame hood contraction section 42, and the other end is matched with the adjusting gear 5. In some embodiments, the end of the gear strip pull rod 61 close to the adjusting gear 5 is provided with a gear strip 6, and the gear strip 6 can be matched and linked with the adjusting gear 5.

[0038] The above-mentioned adjustable flame burner can realize accurate adjustment of the relative position of the flame hood 4 and the peripheral air pipe 3 through the gear shaft mounting seat 11 and the adjusting device, and then change the shape of the combustion flame, so as to adapt to different combustion conditions and industrial production needs. Specifically, when the flame height, width, color, shape and the like need to be adjusted, the position of the flame hood 4 can be changed by adjusting the rotation of the adjusting gear shaft 51, so as to adjust the flame shape.

[0039] In operation, the electric servo shaft 71 is connected with the adjusting gear shaft 51 through the coupling 72, and when the electric servo 7 is in operation, it drives the adjusting gear shaft 51 in the coupling 72 to rotate. One end of the gear bar pull rod 61 is connected with the body of the firebox 4, and the other end is connected with the adjusting gear 5 through the gear bar 6. When the electric servo shaft 71 rotates, the adjusting gear shaft 51 drives the adjusting gear 5, and then drives the gear bar pull rod 61 and the firebox 4 to move correspondingly, so as to change the relative position of the firebox 4 and the peripheral air pipe 3, and then change the flame shape. At the same time, the gap fit between the gear shaft and the gear shaft hole 12 can reduce the wear and tear, and ensure the long-term stable operation of the burner.

[0040] The burner air inlet section 1, the peripheral air pipe 3 and the firebox 4 combine to form an air flow passage; the gas enters the burner from the gas pipe 8, and the gas pipe 8 guides the gas to the boiler furnace; the boiler and the burner are installed through the installation flange 2;

[0041] During the operation or debugging of the burner, the electric servo 7 is controlled to rotate the electric servo shaft 71, which drives the coupling 72 and the adjusting gear shaft 51 at the other end of the coupling 72 to rotate coaxially and at the same frequency; the coupling 72 has the functions of compensating the deviation between the two shafts due to inaccurate manufacturing and installation, deformation or thermal expansion during operation, and relieving impact and absorbing vibration.

[0042] The rotation of the adjusting gear shaft 51 drives the adjusting gear 5 to rotate, and the gear bar 6 engaged with the adjusting gear 5 drives the gear bar pull rod 61 to move in the axial direction of the burner air inlet section 1, at this time the firebox 4 fixed at the other end of the gear bar pull rod 61 also moves in the axial direction of the burner air inlet section 1, thereby realizing the position adjustment of the firebox 4; the direction of rotation of the electric servo 7 is different, which can realize the axial movement of the firebox 4 away from or close to the air inlet section, thereby adjusting the shape of the combustion flame.

[0043] In some embodiments, the gear bar pull rod 61 is further provided with a gear bar sliding rail 62 at the middle position; the gear bar pull rod 61 is sleeved in the gear bar sliding rail 62, and the gear bar pull rod 61 and the gear bar sliding rail 62 are gap fit. When the adjusting gear 5 is driven by the adjusting gear shaft 51, it drives the gear bar pull rod 61 to move horizontally, and since the gear bar pull rod 61 is sleeved in the gear bar sliding rail 62, the sliding is smoother, and the sliding direction can be guaranteed to be horizontal. By sleeving the middle part of the gear bar pull rod 61 in the gear bar sliding rail 62, the gear bar pull rod 61 can be prevented from loosening or deviating during movement, and the gear bar pull rod 61 is limited to move only in the axial direction, so that the firebox 4 is not deviated during adjustment, and the engagement failure of the adjusting gear 5 and the gear bar 6 is avoided.

[0044] Specifically, when the electric servo 7 rotates, the adjusting gear 5 will also rotate, and in turn drive the gear bar pull rod 61 to slide left and right through the gear bar slide rail 62, and the fire cover 4 will also change its relative position. The clearance fit of the gear bar slide rail 62 can ensure the smooth sliding of the gear bar pull rod 61, reduce the friction and wear with the gear bar slide rail 62, and also help to ensure the mating accuracy of the gear bar pull rod 61 and the adjusting gear 5, improve the adjustment accuracy and reliability of the burner.

[0045] In some embodiments, the outer air tube 3 ends are uniformly arranged with outer air tube limiting grooves 31; the fire cover 4 body is uniformly provided with fire cover limiting blocks 41 corresponding to the positions of the air tube limiting grooves; the fire cover limiting blocks 41 are located in the outer air tube limiting grooves 31, and the two belong to clearance fit. Since the fire cover limiting blocks 41 are located in the outer air tube limiting grooves 31, no matter whether the fire cover 4 moves forward or backward under the drive of the gear bar pull rod 61, it cannot exceed the distance range of the outer air tube limiting grooves 31. On the one hand, it prevents the circumferential rotation of the fire cover 4, and on the other hand, it defines the adjustment range of the fire cover 4 in the axial direction.

[0046] Such design can ensure that the relative position of the fire cover 4 is fixed relative to the position of the outer air tube 3, because the clearance fit of the fire cover limiting blocks 41 and the air tube limiting grooves can prevent the fire cover 4 from moving or rotating excessively during use. This limiting structure can also ensure that the fire cover 4 can maintain an appropriate position under different working conditions, thereby achieving better combustion effect.

[0047] In some embodiments, the firebox 4 also includes a firebox contraction section 42 located at the end of the firebox 4 away from the peripheral air tube 3. The aperture of the firebox contraction section 42 near the end of the firebox 4 is larger than the aperture of the firebox contraction section 42 away from the end of the firebox 4, and the aperture of the firebox contraction section 42 gradually changes in size. The gradual change in the size of the aperture of the firebox contraction section 42 can adjust the shape of the flame, thereby affecting the combustion effect of the burner. During the combustion process, the fuel and gas entering the combustion chamber of the burner need to pass through the firebox contraction section 42. Due to the different sizes of the apertures, the fuel and gas at different positions will be restricted and blocked to different degrees, causing the shape, size, and position of the flame to change, thereby affecting the efficiency and stability of combustion. Therefore, the change in the size of the aperture of the firebox contraction section 42 can optimize the combustion effect of the burner by adjusting the shape of the flame. When the gas enters the firebox contraction section 42 from the gas tube 8, the gas flow rate and pressure change due to the change in the size of the aperture, causing the gas to diffuse and focus. This diffusion and focusing effect can make the gas and air mix more uniformly, and form a high-speed jet at the outlet of the firebox contraction section 42, making the combustion more stable and efficient. In addition, the shape of the firebox contraction section 42 can also help the mixed gas to achieve a better flow state, making the combustion more uniform and stable.

[0048] In some embodiments, the gas tube 8 is equipped with a flame stabilizer plate 81 located at the gas outlet end of the firebox 4. The flame stabilizer plate 81 is provided with a flame stabilizer plate conical expansion section 82. The function of the flame stabilizer plate 81 is to form a stable flame shape at the outlet by means of resistance and diffusion. The conical expansion section of the flame stabilizer plate 81 can increase the gas flow rate while allowing the gas to mix sufficiently within the expansion section, thereby achieving better combustion efficiency. In addition, the geometric shape of the conical expansion section can be optimized according to the gas flow rate and characteristics to achieve better stability and combustion efficiency.

[0049] In some embodiments, the flame stabilizer plate 81 is provided with a swirler, which can form a swirling wind to promote the mixing of air and gas, forming a swirling flame downstream, which is more conducive to heat exchange in different flame regions and stabilizing the flame. In addition, the swirler on the flame stabilizer plate 81 can forcibly rotate the gas before it enters the flame stabilizer plate 81, forming a rotating fluid, thereby allowing the gas and air to mix better and further increasing the combustion efficiency and stability. At the same time, the swirler can also increase the residence time of the gas in the flame stabilizer plate 81, allowing the combustion to be more complete and reducing waste gas emissions and energy waste.

[0050] In some embodiments, the adjusting gear shaft 51 is installed with a pointer 52 between the coupling 72 and the gear shaft bearing 73; the gear shaft mounting seat 11 is engraved with a scale disc 13 in the direction indicated by the pointer 52, and the scale disc 13 is engraved with the movement value of the fire cover 4, which is convenient for observation and adjustment.

[0051] The pointer 52 and the scale disc 13 provide a visual way to display the position of the adjusting gear shaft 51, allowing users to more accurately control the flame size and temperature. When the user needs to change the flame size or temperature, the adjusting gear shaft 51 can be rotated to adjust, and the current gear shaft position can be read through the pointer 52 and the scale disc 13 to understand the change of the flame size and temperature. This design is simple and easy to use, which is convenient for users to adjust the flame and improves the work efficiency.

[0052] In the present application, the flame stabilizing disc 81 installed at the end of the gas pipe 8 is located in the fire cover 4, and the edge of the flame stabilizing disc 81 and the end surface of the converging section 42 of the fire cover form a secondary air passage; when the fire cover 4 moves axially, the relative distance between the edge of the flame stabilizing disc 81 and the converging section 42 of the fire cover changes, at which time the passage area of the secondary air also changes, achieving the adjustment of the secondary air. Such adjustment is simple and convenient. The principle of adjusting the secondary air and the flame shape in the present application is that the initial position of the fire cover 4, that is, the zero position of the scale disc 13, the converging section 42 of the fire cover and the conical expansion section 82 of the flame stabilizing disc are basically flush in the direction perpendicular to the axis of the fire cover 4; when adjusting, if the fire cover 4 moves from the initial position to the air inlet section, the passage area of the secondary air becomes larger, the amount of secondary air becomes larger, and the direction of the secondary air is mainly affected by the conical expansion section 82 of the flame stabilizing disc, forming a short and thick flame downstream; if the fire cover 4 moves away from the initial position to the air inlet section, the passage area of the secondary air becomes larger, the amount of secondary air becomes larger, and the direction of the secondary air is mainly affected by the converging section 42 of the fire cover, forming a thin and long flame downstream, and the greater the moving distance, the thinner and longer the flame.

[0053] In some embodiments, the electric servo 7 is connected with the burner controller 9, and the burner controller 9 has a position database of the fire cover 4 corresponding to different hearth sizes, which can adjust the appropriate position of the fire cover 4 according to different hearth sizes.

[0054] This setting allows the burner to adaptively adjust according to different hearth sizes to obtain the best combustion effect and energy-saving effect. Through the built-in database, the burner controller 9 can select the most appropriate position of the fire cover 4 according to the hearth size input by the user and automatically adjust through the servo motor, thereby realizing efficient, stable and reliable combustion control. This can save adjustment time and manpower and improve the efficiency and performance of the burner.

[0055] The above describes in detail the adjustable flame burner provided by the present application. The description of the specific embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An adjustable flame burner, comprising a burner air inlet section (1) and a gas pipe (8), wherein the burner air inlet section (1) and the gas pipe (8) are coaxially arranged, characterized in that: The burner air inlet section (1) is coaxially provided with an outer air pipe (3) and a flame hood (4); the outer diameter of the flame hood (4) is smaller than the inner diameter of the outer air pipe (3), and the flame hood (4) can slide inside the outer air pipe (3); the burner also includes an adjustment device, which is connected to the flame hood (4) and is used to adjust the relative position of the flame hood (4) and the outer air pipe (3); A gear shaft mounting seat (11) is installed on the burner air inlet section (1); the gear shaft mounting seat (11) has a gear shaft hole (12); the axis of the gear shaft hole (12) is perpendicular to the axis of the burner air inlet section (1); the adjustment device includes an electric servo (7), a coupling (72), an adjusting gear shaft (51) and a gear shaft bearing (73) arranged sequentially from top to bottom; the electric servo (7) includes an electric servo rotating shaft (71); an adjusting gear (5) is provided at one end of the adjusting gear shaft (51) away from the coupling (72), and the other end of the adjusting gear shaft (51) passes through the gear shaft hole (12), the gear shaft bearing (73) and the coupling (72) in sequence; the adjusting gear shaft (51) and the gear shaft hole (12) are clearance fit; the electric servo rotating shaft (71) and the adjusting gear shaft (51) are sleeved in the coupling (72) to achieve coaxial and synchronous rotation; The flame-gathering cover (4) includes a gear rack rod (61) and a flame-gathering cover (4) body; one end of the gear rack rod (61) is connected to the flame-gathering cover (4) body, and the other end of the gear rack rod (61) is engaged with an adjusting gear (5); The electric servo (7) is connected to an external burner controller (9). The burner controller (9) has a built-in database of the positions of the flame-gathering hoods (4) corresponding to different furnace sizes, and can adjust the appropriate position of the flame-gathering hoods (4) for different furnace sizes.

2. The adjustable flame burner according to claim 1, characterized in that: The gear rack (6) is provided with a gear rack (6) at one end of the gear rack (61) near the adjusting gear (5), and the gear rack (6) can cooperate and link with the adjusting gear (5).

3. The adjustable flame burner according to claim 2, characterized in that: A gear rack slide rail (62) is also provided at the middle position of the gear rack tie rod (61); the middle part of the gear rack tie rod (61) is sleeved in the gear rack slide rail (62), and the gear rack tie rod (61) and the gear rack slide rail (62) are clearance fit.

4. The adjustable flame burner according to claim 3, characterized in that: The outer air pipe (3) is uniformly arranged with outer air pipe limiting grooves (31) at its end; the flame-gathering cover (4) is uniformly arranged with flame-gathering cover limiting blocks (41) at the position corresponding to the outer air pipe limiting grooves (31); the flame-gathering cover limiting blocks (41) are located inside the outer air pipe limiting grooves (31), and the two are in clearance fit.

5. The adjustable flame burner according to claim 4, characterized in that: The flame-gathering cover (4) also includes a flame-gathering cover shrink section (42); the flame-gathering cover shrink section (42) is located at the end of the flame-gathering cover (4) away from the outer air pipe (3), the aperture of the end of the flame-gathering cover shrink section (42) near the flame-gathering cover (4) is larger than the end of the flame-gathering cover shrink section (42) away from the flame-gathering cover (4), and the aperture of the flame-gathering cover shrink section (42) gradually changes.

6. The adjustable flame burner according to claim 5, characterized in that: The gas pipe (8) is equipped with a flame stabilizer plate (81), which is located at the gas outlet end of the flame hood (4); the flame stabilizer plate (81) is provided with a conical expansion section (82).

7. A burner with an adjustable flame according to claim 6, characterized in that: The flame stabilizer (81) is equipped with a vortex generator.

8. A burner with an adjustable flame according to claim 7, characterized in that: A pointer (52) is mounted on the adjusting gear shaft (51), and the pointer (52) is located between the coupling (72) and the gear shaft bearing (73); the surface of the gear shaft mounting base (11) is engraved with a scale (13), and the scale (13) is located in the direction pointed to by the pointer (52).

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