Premixing type burner nozzle

Abstract

The utility model belongs to the technical field of combustors, and particularly relates to a premixing type combustor nozzle which comprises an installation plate, a spraying barrel body is fixedly installed on one side of the installation plate, a sealing block is fixedly installed on the inner side wall of the spraying barrel body, an air inlet is formed in the surface of one side of the sealing block, and a nozzle is arranged on the other side of the sealing block. A fuel gas inlet is formed in the surface of one side of the sealing block, a fuel mixing mechanism is arranged on the inner side of the spraying barrel body, and a combustion adjusting mechanism is arranged on one side of the mixing mechanism. According to the premixing type combustor nozzle, fuel and air are mixed through the fuel mixing mechanism, combustion is more sufficient, the flow speed of the mixed fuel is adjusted through the combustion adjusting mechanism so that the combustion size of flame in front of the nozzle can be controlled and adjusted, fuel mixing and flow speed adjusting are separated, and the combustion efficiency is improved. The technical problem that in the prior art, part of natural gas fuel leaks through an air pipeline is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a burner technical field especially relates to a premixing type burner nozzle. BACKGROUND

[0002] In prior art, such as the utility model discloses a kind of can enhance natural gas and air premixing's burner nozzle on the patent website of China, by adjusting the speed of fuel entering the burner nozzle, to adjust the rotation speed of small windmill, when small windmill rotates, a negative pressure zone is formed at the interface of air pipeline and burner nozzle, so that air is pressed into burner nozzle, so that fuel and air are mixed. Make burner nozzle equipment more convenient for fuel size adjustment, also can make fuel and air more fully mixed, to reduce environmental pollution in turn;The rotational flow generated by small windmill realizes that the fuel of injection is more stable and uniform

[0003] But in actual use, when needing to adjust small flame, the speed of fuel entering the burner nozzle needs to be adjusted low, which makes the rotation speed of small windmill lower, and the suction force of the negative pressure zone formed is also reduced, which can cause part of natural gas fuel to leak out through the air pipeline, with great safety hazard. UTILITY MODEL CONTENTS

[0004] Based on the technical problem that part of natural gas fuel leaks through the air pipeline in prior art, the utility model provides a premixing type burner nozzle.

[0005] The utility model provides a premixing type burner nozzle, including mounting plate, the side fixed mounting of mounting plate has the nozzle body, the inner side wall fixed mounting of nozzle body has sealing block, the side surface of sealing block is equipped with air inlet, the side surface of sealing block is equipped with fuel inlet, the inner side of nozzle body is provided with fuel mixing mechanism, the side of mixing mechanism is provided with combustion adjusting mechanism.

[0006] Preferably, the fuel mixing mechanism includes a tapered tube, the tapered tube is fixedly installed on one side of the sealing block, one end of the tapered tube is fixedly connected with the air inlet, a plurality of air suction holes are formed on the outer surface of the tapered tube, a sealing plate is fixedly connected to the end of the tapered tube away from the sealing block, and a mixing cavity is formed between the sealing plate and the sealing block.

[0007] Preferably, a gas guide hole is formed on the outer surface of the sealing plate, one end of the gas guide hole is fixedly connected with one end of the tapered tube, a fixed block is fixedly installed on one side surface of the sealing plate, a tapered groove is formed on one side surface of the fixed block, one side opening of the tapered groove is fixedly connected with one side surface of the gas guide hole, and a flow guide groove is formed on the inner side wall of the tapered groove.

[0008] Preferably, the inner side wall of the spray barrel body is fixedly provided with a flow guide plate, the flow guide plate is arranged on the front side of the fixed block, and a plurality of flow guide holes are formed in the surface of the flow guide plate.

[0009] Preferably, the combustion adjusting mechanism comprises a right-angle commutator fixedly arranged on one side of the middle part of the flow guide plate, a rotating rod fixedly connected to the output end of the right-angle commutator, a flow guide fan fixedly connected to the arc surface of one end of the rotating rod, a transmission rod fixedly connected to the input end of the right-angle commutator, wherein the upper part of the transmission rod penetrates through and extends out of the upper part of the spray barrel body, an installation table fixedly arranged on the arc surface of the spray barrel body, a rotating motor fixedly arranged on the upper part of the installation table, and a heat insulation protective cover fixedly arranged on the upper part of the installation table.

[0010] Preferably, the inner side wall of the spray barrel body is fixedly provided with a flow guide cover, the flow guide cover is arranged on the front side of the flow guide fan, a UV flame detector is fixedly arranged on the inner side wall of the flow guide cover, and a mixed gas outlet is formed in the front side of the spray barrel body, wherein one side of the mixed gas outlet is fixedly connected to the front side of the flow guide cover.

[0011] Preferably, the spray barrel body is fixedly provided with an igniter on one side, the igniter is arranged below the mixed gas outlet, and a flame cover is fixedly arranged on one side of the spray barrel body.

[0012] The beneficial effects of the present application are as follows:

[0013] The fuel mixing mechanism is arranged to mix fuel and air, so that the fuel can be burned more fully, the combustion adjusting mechanism is arranged to adjust the flow rate of the mixed fuel, so that the size of the flame in front of the nozzle can be controlled and adjusted, and the fuel mixing and flow rate adjustment are separated, thereby solving the technical problem that part of the natural gas fuel leaks through the air pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 A schematic view of the premixing type burner nozzle is provided in the present application;

[0015] Fig. 2 A sectional view of the spray barrel body of the premixing type burner nozzle is provided in the present application;

[0016] Fig. 3 A sectional view of the mixing chamber of the premixing type burner nozzle is provided in the present application.

[0017] In the figure: 1, mounting plate; 2, spray barrel body; 3, sealing block; 4, air inlet; 5, fuel inlet; 6, conical pipe; 7, air suction hole; 8, sealing plate; 9, mixing cavity; 10, air guide hole; 11, fixing block; 12, conical groove; 13, flow guide groove; 14, flow guide plate; 15, flow guide hole; 16, right-angle commutator; 17, rotating rod; 18, flow guide fan; 19, transmission rod; 20, mounting table; 21, rotating motor; 22, heat insulation protective cover; 23, flow guide cover; 24, UV flame detector; 25, mixed gas outlet; 26, igniter; 27, flame cover. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0019] Reference Figs. 1-3 A premixed burner nozzle, comprising a mounting plate 1, a spray barrel body 2 is fixedly installed on one side of the mounting plate 1, a sealing block 3 is fixedly installed on the inner side wall of the spray barrel body 2, an air inlet 4 is formed in the surface of one side of the sealing block 3, a fuel inlet 5 is formed in the surface of one side of the sealing block 3, a fuel mixing mechanism is arranged on the inner side of the spray barrel body 2, and a combustion adjusting mechanism is arranged on one side of the mixing mechanism.

[0020] The fuel mixing mechanism comprises a conical pipe 6, the conical pipe 6 is fixedly installed on one side of the sealing block 3, one end of the conical pipe 6 is fixedly connected with the air inlet 4, a plurality of air suction holes 7 are formed in the outer surface of the conical pipe 6, a sealing plate 8 is fixedly connected with the end of the conical pipe 6 away from the sealing block 3, and the mixing cavity 9 is formed between the sealing plate 8 and the sealing block 3.

[0021] When air is conveyed into the conical pipe 6 through the air inlet 4, the flow rate of the air passing through the conical pipe 6 becomes fast due to the fact that the cross-sectional area of the conical pipe 6 becomes smaller, the air suction holes 7 on the conical pipe 6 form negative pressure, fuel is conveyed into the mixing cavity 9 through the fuel inlet 5, and the negative pressure around the air suction holes 7 can suck the fuel in the mixing cavity 9 into the conical pipe 6 to mix with the air.

[0022] An air guide hole 10 is formed in the outer surface of the sealing plate 8, one end of the air guide hole 10 is fixedly connected with one end of the conical pipe 6, a fixing block 11 is fixedly installed on the surface of one side of the sealing plate 8, a conical groove 12 is formed in the surface of one side of the fixing block 11, the opening of one side of the conical groove 12 is fixedly connected with the surface of one side of the air guide hole 10, and a flow guide groove 13 is formed in the inner side wall of the conical groove 12.

[0023] The gas mixed by the conical tube 6 is transported into the conical groove 12 through the air guide hole 10, the guide groove 13 on the inner side wall of the conical groove 12 guides the mixed gas to generate a cyclone to further mix the air and the fuel, and the conical setting of the conical groove 12 slows down the flow rate of the mixed gas to prevent the flow rate from being too fast to be easily controlled.

[0024] The inner side wall of the spray barrel body 2 is fixedly installed with a flow guide plate 14, the flow guide plate 14 is arranged on the front side of the fixed block 11, and a plurality of flow guide holes 15 are formed in the surface of the flow guide plate 14.

[0025] The flow guide holes 15 on the flow guide plate 14 are arranged in a honeycomb shape to control the horizontal flow rate of the mixed gas passing through the flow guide holes 15 to prevent uneven flow rate.

[0026] The combustion adjusting mechanism includes a right-angle commutator 16 fixedly installed on one side of the middle part of the flow guide plate 14, a rotating rod 17 fixedly connected to the output end of the right-angle commutator 16, a flow guide fan 18 fixedly connected to the arc surface of one end of the rotating rod 17, a transmission rod 19 fixedly connected to the input end of the right-angle commutator 16, the upper part of the transmission rod 19 extending out of the upper part of the spray barrel body 2, an installation table 20 fixedly installed on the arc surface of the spray barrel body 2, a rotating motor 21 fixedly installed on the upper part of the installation table 20, the output end of the rotating motor 21 fixedly connected to the upper end of the transmission rod 19 through a shaft coupling, and a heat protection cover 22 fixedly installed on the upper part of the installation table 20.

[0027] The rotating motor 21 is arranged to drive the transmission rod 19 to rotate, the rotation of the transmission rod 19 drives the rotating rod 17 to rotate through the rotation of the right-angle commutator 16, so that the flow guide fan 18 rotates to control and adjust the flow rate of the mixed gas, and the mixed gas is re-accelerated for transportation.

[0028] The inner side wall of the spray barrel body 2 is fixedly installed with a flow guide cover 23, the flow guide cover 23 is arranged on the front side of the flow guide fan 18, a UV flame detector 24 is fixedly installed on the inner side wall of the flow guide cover 23, a mixed gas outlet 25 is formed on the front side of the spray barrel body 2, and one side of the mixed gas outlet 25 is fixedly connected to the front side of the flow guide cover 23.

[0029] The re-accelerated mixed gas passing through the flow guide fan 18 is discharged through the flow guide cover 23 and the mixed gas outlet 25 for ignition and combustion, the UV flame detector 24 on the inner side wall of the flow guide cover 23 detects whether there is backfire in the flow guide cover 23 by detecting the ultraviolet band of the flame, the UV flame detector 24 is a device specially designed for detecting the flame, which identifies the existence of the flame by detecting the ultraviolet of the flame, and stops the input of fuel when backfire is detected.

[0030] The ignition device 26 is arranged below the mixed gas outlet 25, and the flame cover 27 is arranged on the side of the spray barrel body 2.

[0031] The ignition device 26 ignites the mixed gas output by the mixed gas outlet, and the flame cover 27 guides the flame to prevent the flame from being sprayed in all directions.

[0032] Working principle: firstly, air is delivered into the conical pipe 6 through the air inlet 4, and fuel gas is delivered into the mixing chamber 9 through the fuel inlet 5; the air flow rate in the conical pipe 6 is accelerated to generate negative pressure around the air inlet hole 7, so that the fuel in the mixing chamber 9 is sucked into the conical pipe 6 to mix with the air; the mixed gas in the conical pipe 6 is delivered into the conical groove 12 through the air guide hole 10; the guide groove 13 arranged on the inner wall of the conical groove 12 guides the mixed gas to generate rotational flow to further mix the air with the fuel; the conical arrangement of the conical groove 12 slows down the flow rate of the mixed gas to prevent the flow rate from being too fast to be controlled; the mixed gas is finally delivered through the air guide hole 15 on the air guide plate 14, the air guide hole 15 is arranged in a honeycomb shape to control the horizontal flow rate of the mixed gas to prevent the flow rate from being uneven; the rotary motor 21 is started to drive the transmission rod 19 to rotate, the rotation of the transmission rod 19 drives the rotary rod 17 to rotate through the rotation of the right-angle commutator 16, so that the air guide fan 18 rotates to control and adjust the flow rate of the mixed gas, so that the mixed gas is re-accelerated to be delivered; the mixed gas is re-accelerated by the air guide fan 18, and is discharged through the air guide cover 23 and the mixed gas outlet 25 to be ignited and burned; the UV flame detector 24 on the inner wall of the air guide cover 23 detects whether there is backfire in the air guide cover 23 by detecting the ultraviolet wave band of the flame; when the backfire is detected, the fuel input is quickly stopped; the ignition device 26 ignites the mixed gas output by the mixed gas outlet, and the flame cover 27 guides the flame to prevent the flame from being sprayed in all directions; the rotation speed of the air guide fan 18 is controlled by the rotary motor 21, so that the size of the flame can be conveniently adjusted.

[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A premixed burner nozzle, comprising a mounting plate (1), characterized in that: A nozzle body (2) is fixedly installed on one side of the mounting plate (1). A sealing block (3) is fixedly installed on the inner wall of the nozzle body (2). An air inlet (4) is opened on one side surface of the sealing block (3). A fuel inlet (5) is opened on one side surface of the sealing block (3). A fuel mixing mechanism is provided on the inner side of the nozzle body (2). A combustion adjustment mechanism is provided on one side of the mixing mechanism. The fuel mixing mechanism mixes fuel and air to ensure more complete combustion. The combustion adjustment mechanism controls and adjusts the size of the flame.

2. The premixed burner nozzle according to claim 1, characterized in that: The fuel mixing mechanism includes a conical tube (6), which is fixedly installed on one side of the sealing block (3). One end of the conical tube (6) is fixedly connected to the air inlet (4). Multiple air intake holes (7) are provided on the outer surface of the conical tube (6). A sealing plate (8) is fixedly connected to the end of the conical tube (6) away from the sealing block (3). A mixing chamber (9) is formed between the sealing plate (8) and the sealing block (3).

3. A premixed burner nozzle according to claim 2, characterized in that: The outer surface of the sealing plate (8) is provided with an air guide hole (10). One end of the air guide hole (10) is fixedly connected to one end of the tapered tube (6). A fixing block (11) is fixedly installed on one side surface of the sealing plate (8). A tapered groove (12) is provided on one side surface of the fixing block (11). One side opening of the tapered groove (12) is fixedly connected to one side surface of the air guide hole (10). A flow guide groove (13) is provided on the inner side wall of the tapered groove (12).

4. A premixed burner nozzle according to claim 3, characterized in that: A guide plate (14) is fixedly installed on the inner side wall of the spray nozzle body (2). The guide plate (14) is located on the front side of the fixed block (11), and a plurality of guide holes (15) are opened on the surface of the guide plate (14).

5. A premixed burner nozzle according to claim 4, characterized in that: The combustion adjustment mechanism includes a right-angle commutator (16), which is fixedly installed on one side of the middle part of the guide plate (14). The output end of the right-angle commutator (16) is fixedly connected to a rotating rod (17). One end of the rotating rod (17) is fixedly connected to a guide fan (18). The input end of the right-angle commutator (16) is fixedly connected to a transmission rod (19). The upper part of the transmission rod (19) passes through and extends out of the upper part of the nozzle body (2). The arc surface of the nozzle body (2) is fixedly installed with a mounting platform (20). The upper part of the mounting platform (20) is fixedly installed with a rotating motor (21). The output end of the rotating motor (21) is fixedly connected to the upper end of the transmission rod (19) through a coupling. The upper part of the mounting platform (20) is fixedly installed with a heat insulation protective cover (22).

6. A premixed burner nozzle according to claim 5, characterized in that: A flow guide (23) is fixedly installed on the inner wall of the nozzle body (2). The flow guide (23) is located on the front side of the flow guide fan (18). A UV flame detector (24) is fixedly installed on the inner wall of the flow guide (23). A mixed gas outlet (25) is opened on the front side of the nozzle body (2). One side of the mixed gas outlet (25) is fixedly connected to the front side of the flow guide (23).

7. A premixed burner nozzle according to claim 6, characterized in that: An igniter (26) is fixedly installed on one side of the nozzle body (2), and the igniter (26) is located below the mixed gas outlet (25). A flame cover (27) is fixedly installed on one side of the nozzle body (2).

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