阅读说明：本技术 一种具有低涡旋燃烧特性的燃烧器 (Combustor with low vortex burning characteristic ) 是由 王凌云 于 2020-06-30 设计创作，主要内容包括：本发明涉及一种具有低涡旋燃烧特性的燃烧器,上盖(1)和下盖(2)均为圆形半蜗壳螺旋盘体,进气通道从圆形蜗壳的切线方向与蜗壳圆滑结合形成一体式盖体；上盖(1)和下盖(2)相互扣合成为具有蜗壳状燃烧空间的整体且进气通道与文丘里混合管(3)一端连通；文丘里混合管(3)另一端连接喷嘴喉管组件(4)；上盖(1)和下盖(2)的圆形蜗壳螺旋形成偏圆心,在上盖(1)和下盖(2)的各自偏圆心处均设置能够相互对接连通的偏心孔(11和21)；上盖(1)的盘面上围绕所述偏心孔(11)间隔设置若干燃烧孔(6)。轻便可随身携带户外使用,具有完全燃烧的特性,能够提高高低海拔适应性,适应多变的大气环境。(The invention relates to a burner with low vortex combustion characteristic, wherein an upper cover (1) and a lower cover (2) are both circular semi-volute spiral disc bodies, and an air inlet channel is smoothly combined with a volute from the tangential direction of the circular volute to form an integrated cover body; the upper cover (1) and the lower cover (2) are mutually buckled into a whole with a volute combustion space, and the air inlet channel is communicated with one end of the Venturi mixing pipe (3); the other end of the Venturi mixing pipe (3) is connected with a nozzle throat pipe component (4); the circular volutes of the upper cover (1) and the lower cover (2) form eccentric centers in a spiral manner, and eccentric holes (11 and 21) which can be in butt joint communication with each other are arranged at the eccentric centers of the upper cover (1) and the lower cover (2); a plurality of combustion holes (6) are arranged on the disc surface of the upper cover (1) at intervals around the eccentric hole (11). The portable outdoor portable high-altitude environment-friendly energy-saving stove is portable, can be used outdoors, has the characteristic of complete combustion, can improve the high-altitude and low-altitude adaptability, and is suitable for variable atmospheric environments.)

1. A combustor having low swirl combustion characteristics, comprising: the nozzle comprises an upper cover (1), a lower cover (2), a Venturi mixing pipe (3) and a nozzle throat pipe assembly (4);

the upper cover (1) and the lower cover (2) are both circular semi-volute spiral disc bodies, and the air inlet channel is smoothly combined with the volute from the tangential direction of the circular volute to form an integrated cover body;

the upper cover (1) and the lower cover (2) are mutually buckled into a whole with a volute combustion space, and the air inlet channel is communicated with one end of the Venturi mixing pipe (3); the other end of the Venturi mixing pipe (3) is connected with a nozzle throat pipe component (4);

the circular volutes of the upper cover (1) and the lower cover (2) form eccentric centers in a spiral manner, and eccentric holes (11 and 21) which can be in butt joint communication with each other are arranged at the eccentric centers of the upper cover (1) and the lower cover (2); a plurality of combustion holes (6) are arranged on the disc surface of the upper cover (1) at intervals around the eccentric hole (11).

2. The burner with low swirl combustion characteristics as claimed in claim 1, wherein the combustion holes (6) are distributed in a plurality of concentric circles around the eccentric hole (11) of the upper cover, and a plurality of complementary combustion holes are further arranged around the outermost periphery of the combustion holes (6) distributed in concentric circles in an arc-shaped distribution.

3. The burner with low vortex combustion characteristics as claimed in claim 1, wherein the distance between circles of the combustion holes (6) distributed in concentric circles is 2-5 mm, and the diameter of the combustion hole (6) is 1-2 mm; the total number of the combustion holes (6) is not less than 100, and the total area of the combustion holes (6) is not less than 120 square millimeters; the volute diameter is greater than 40 mm.

4. The burner with low swirl combustion characteristics according to claim 1, wherein the upper cover has no combustion hole within a radial distance of 10 mm from the center of the eccentric hole (11).

5. The burner with low vortex combustion characteristics as claimed in claim 1, wherein the upper cover (1) and the lower cover (2) are flat plate-stamped discs, the upper cover (1) and the lower cover (2) are buckled with each other and connected as a whole; the eccentric holes of the upper cover (1) and the lower cover (2) are provided with vertical walls facing the volute-shaped combustion space, and the vertical walls of the eccentric holes of the upper cover (1) and the lower cover (2) are connected in a vertical welding mode.

6. Burner with low swirl combustion characteristics according to claim 1, characterized in that the nozzle throat assembly (4) is provided with circumferential inlet holes (44), the total number of circumferential inlet holes (44) being 4-6, the aperture being larger than 3 mm.

7. The burner with low swirl combustion characteristics as claimed in claim 1, wherein the venturi mixing tube (3) is a pipe with a diameter larger than the diameter of the nozzle throat assembly (4), and is connected with the nozzle throat assembly (4) through a nut to form a venturi tube assembly with a diameter expanding along the downstream direction of the inlet air flow.

8. The burner with low vortex combustion characteristics as claimed in claim 1, wherein a connecting frame (5) is provided to connect with the upper cover (1) or the lower cover (2) to fixedly connect the upper cover (1) and the lower cover (2) to a base (7) having a hollow space, and an air inlet hole (71) communicating with the hollow space is provided in a sidewall below the base (7); an external portable gas tank (8) is connected with an inlet of the nozzle throat pipe assembly (4) through a gas pipe (9), a valve is arranged at the joint of the gas pipe (9) and the gas tank (8), and ignition is carried out from a combustion hole (6) in the hollow space of the base (7).

9. The burner with low swirl combustion characteristics according to claim 1, wherein the circular volute portion of the lower cover (2) is provided with two axisymmetric fixed end lugs (22), and the two fixed end lugs (22) are circumferentially spaced from a tangential intake passage of the circular volute; one end of the connecting frame (5) is connected with the fixed end lug (22), and the other end of the connecting frame (5) is detachably connected with the base (7); the nozzle throat component 4 and the venturi mixing pipe 3 are connected to form a venturi component which extends into the base from a base air inlet hole (71) and is suspended and communicated with a tangential air inlet channel of the circular volute.

10. Burner with low vortex combustion characteristics according to claim 1, characterized in that the nozzle throat assembly (4) and the venturi mixing tube (3) are removably connected with a nut.

Technical Field

The invention belongs to the technical field of civil burners, and particularly relates to a low-vortex burner with high-low altitude adaptability and high thermal efficiency.

Background

When the user goes outdoors for a long time, the user is usually required to carry the heating stove for heating and cooking food. At present, the portable outdoor integrated furnace sold in a commodity form mainly focuses on three relatively mature brands: MSR, jiebao, huofeng, usa.

The MSR company product adopts a far infrared metal net combustion mode, belongs to complete combustion, and comprises the following components: the chemical equivalence ratio of the fuel is more than 1, the fuel is fully combusted, the heat energy utilization rate is high, and the air-lean state at high altitude can be automatically adapted. The disadvantage is that it cannot operate below 50% of nominal power. It is not possible to boil water, for example, to stew rice.

The products of Jiebao and Huofeng have no obvious difference in principle and structure, adopt an atmospheric combustion mode, belong to incomplete combustion, and adopt the same principle for 99 percent of household gas appliances. Air: the stoichiometric ratio of the fuel is less than 1, secondary air is needed for supplementary combustion, and the device cannot automatically adapt to the lean air state at high altitude. For example, a common gas cooker sold in plain areas, a water heater controlled by non-automatic oxygen sensing, and the like cannot be normally used in the lata city, and similarly, a gas cooker used in the lata cannot be normally used in all the achievements. (attached literature: "research on countermeasure for influence of altitude on heat load of gas appliance" [ gas and heat power ] "period 7 in 2010), at least, combustion efficiency is reduced and heating time is prolonged.

That is, the oxygen content required by combustion varies in many places and times outdoors due to different altitudes, but it is difficult to adapt to different atmospheric environments because the burner has no characteristics of complete combustion.

Disclosure of Invention

The invention aims to provide a combustor with low vortex combustion characteristics, which is portable, can be carried about for outdoor use, has the characteristic of complete combustion, can improve the adaptability to high and low altitudes, and is suitable for variable atmospheric environments.

In order to solve the technical problems, the invention adopts the following technical scheme:

a combustor having low swirl combustion characteristics, comprising: the nozzle comprises an upper cover (1), a lower cover (2), a Venturi mixing pipe (3) and a nozzle throat pipe assembly (4);

the upper cover (1) and the lower cover (2) are both circular semi-volute spiral disc bodies, and the air inlet channel is smoothly combined with the volute from the tangential direction of the circular volute to form an integrated cover body;

the upper cover (1) and the lower cover (2) are mutually buckled into a whole with a volute combustion space, and the air inlet channel is communicated with one end of the Venturi mixing pipe (3); the other end of the Venturi mixing pipe (3) is connected with a nozzle throat pipe component (4);

the circular volutes of the upper cover (1) and the lower cover (2) form eccentric centers in a spiral manner, and eccentric holes (11 and 21) which can be in butt joint communication with each other are arranged at the eccentric centers of the upper cover (1) and the lower cover (2); a plurality of combustion holes (6) are arranged on the disc surface of the upper cover (1) at intervals around the eccentric hole (11).

Furthermore, the combustion holes (6) are distributed in a plurality of circles (3-6 circles, preferably 4 circles) of concentric circles by taking the eccentric holes of the upper cover (1) as the center of a circle, and a plurality of circles (2-4 circles, preferably 2 circles) of supplementary combustion holes are distributed and surrounded in an arc shape on the outermost periphery of the combustion holes (6) distributed in the concentric circles.

Furthermore, the distance between circles of the combustion holes (6) distributed in concentric circles is 2-5 mm, and the diameter of each combustion hole is 1-2 mm; the total number of the combustion holes (6) is not less than 100, and the total area of the combustion holes (6) is not less than 120 square millimeters; the volute diameter is greater than 40 mm.

Furthermore, no combustion hole is arranged in the upper cover within 10 mm of the radial distance from the center of the eccentric hole (11).

Furthermore, the upper cover (1) and the lower cover (2) are both flat plate punch-formed disc bodies, and the upper cover (1) and the lower cover (2) are buckled with each other and are riveted into a whole; the eccentric holes (11 and 21) are communicated with a hollow space between the upper cover (1) and the lower cover (2) through welding.

Furthermore, the total length of the Venturi mixing pipe (3) is not less than 50 mm, and the inner diameter of the pipe is more than 6 mm.

Furthermore, the nozzle throat component (4) is provided with circumferential air inlets (44), the total number of the air inlets (44) is 4-6, and the aperture is larger than 3 mm.

Furthermore, the venturi mixing pipe (3) is a pipeline with the diameter larger than the pipe diameter of the nozzle throat component (4), and is connected with the nozzle throat component (4) through a nut to jointly form a Venturi pipe component with the pipe diameter enlarged along the air inlet downstream direction.

Furthermore, a connecting frame (5) is arranged to be connected with the upper cover (1) or the lower cover (2), the upper cover (1) and the lower cover (2) are fixedly connected to a base (7) with a hollow space, and an air inlet hole (71) communicated with the hollow space is formed in the side wall below the base (7); an external portable gas tank (8) is connected with an inlet of the nozzle throat pipe assembly (4) through a gas pipe (9), a valve is arranged at the joint of the gas pipe (9) and the gas tank (8), and ignition is carried out from a combustion hole (6) in the hollow space of the base (7).

Furthermore, the circular volute part of the lower cover (2) is provided with two axisymmetric fixed end lugs (22), and the two fixed end lugs (22) and a tangential direction air inlet channel of the circular volute are arranged at intervals in the circumferential direction; one end of the connecting frame (5) is connected with the fixed end lug (22), and the other end of the connecting frame (5) is detachably connected with the base (7); the nozzle throat component 4 and the venturi mixing pipe 3 are connected to form a venturi component which extends into the base from a base air inlet hole (71) and is suspended and communicated with a tangential air inlet channel of the circular volute.

Further, the nozzle-throat pipe assembly (4) and the Venturi mixing pipe (3) are detachably connected through nuts. A

The working principle of the invention is as follows:

the gas enters the throat part of the Venturi assembly from the nozzle to be mixed with air, the mixed gas is sprayed along the Venturi tube assembly to reach the space between the upper cover and the lower cover of the head part of the combustor, the speed of the gas flow overflowing along the outer ring fire hole of the circular volute is certainly high due to the entering in the tangential direction, when the gas rotates to the innermost ring along the volute, the speed is reduced, the speed of the gas flow sprayed out from the inner ring fire hole is low, and a unique inner ring and outer ring flame speed difference is formed. The size of the nozzle, the layout structure of the combustion holes and the size of the air inlet holes and the total area of the fire holes of the upper cover of the burner are all related to the flame speeds of the inner ring and the outer ring.

The outer ring of the invention has high speed and has no relation with fire-off, and the vortex generated by the speed difference of the inner ring and the outer ring ensures the mutual transmission of flame between the inner ring and the outer ring, thereby ensuring that the whole burner can not have fire-off.

Compared with the prior art, the invention has the following beneficial effects:

1. the combustion mode is changed, the structure with the low-vortex combustion characteristic is adopted, the complete combustion characteristic is achieved, and the device is suitable for outdoor different-altitude atmospheric environments.

The applicant consults Chinese patent documents CN 109307266; CN 108895448A; 201810426122.5, respectively; 96224532.1, respectively; 00220153.4, respectively; 90220132.8, these patents were found to be primarily directed at the gas outlet and did not create the structural elements of complete combustion with low swirl flow. Meanwhile, the air stoichiometric quantity is not shown, and the air stoichiometric quantity does not belong to the complete combustion category.

The low swirl combustion mode means that when fuel-air mixture is combusted at the head of a disc type combustor, the air flow speed of an outer ring is higher than that of an inner ring, because the outer ring is high in speed and high in combustion speed, the fuel-air mixture is easy to ignite, the inner ring is low in speed and stable in flame (or can be tempered when the fuel-air mixture is too slow), the relative speed difference between the outer ring and the inner ring causes pressure difference, partial fuel gas flows back from the outer ring to the inner ring to form a swirl backflow area, and the swirl backflow enables the flame to be transmitted between the fast ring and the slow ring, so that the flame stability of the whole combustor is ensured, and the phenomena of ignition and tempering cannot occur.

The present invention creatively adopts an innovative structure with low swirl combustion in a portable burner, the square structure having air: the fuel chemical equivalent ratio is larger than 1, namely when the structure is designed and manufactured, the chemical equivalent of the air entering the combustor has surplus, when the air enters a high-altitude area, even if the oxygen content of the air is reduced, the air is still completely combusted without changing equipment due to the self-adaptability of the Venturi structure, the heat efficiency is ensured, and the air burner is suitable for the changeable atmospheric conditions of high mountains and plain.

2. The low swirling flow theory is firstly adopted in the civil portable outdoor burner to form the original structure of a volute combustion space, a tangential air inlet channel and a Venturi tube.

The invention is characterized in that the invention is successfully applied in the field of low eddy current theory of civil cooking utensils. Since swirl combustion is generally used mainly in industry, especially in the field of large or heavy equipment such as aviation, gas turbine plants and the like. But as the main component of the outdoor portable stove, the volume is reduced, the stove cannot be simply used after the power is reduced, the vortex structure design is carried out according to the outdoor characteristics, the special combined innovative structure of the volute, the tangential air inlet channel and the Venturi tube is formed, the combustion speed of the inner ring and the outer ring of the upper cover of the burner can be effectively controlled, the burner can completely combust fuel in the plateau dilute oxygen and the plateau oxygen-rich environment, and the application range is wide.

The burner structure of the invention obtains empirical parameters in the diameter of the nozzle, the size of the Venturi air inlet, the size number of fire holes and the distribution mode after multiple combustion experiments and adjustments, the burner can stably burn as long as the gas speed difference between the outer ring and the inner ring is properly controlled, and the fire can not be extinguished when the air chemical equivalent is more than 1.

The invention structurally controls the ejection speed and the ejection quantity of mixed gas at the head part of the burner, namely the outer ring fire hole and the inner ring fire hole of the upper cover, so that the speed difference is generated between the outer ring gas and the inner ring gas to generate vortex, and the stable combustion of the stove is ensured. The product is subjected to a combustion experiment at 3500 m high altitude, and optimal parameters are obtained.

The invention can still stably burn when the calibration power is 15 percent, and the MSR product can not normally burn and extinguish when the MSR product is lower than 60 percent of the calibration power, which is mainly determined by the working principle.

The product structure has different altitudes and is superior to the gas consumption and heating power of competitors. The average combustion heat efficiency is high for a competitor by 5-10%, and the heating power and MSR are kept equal and are higher than Czeigo and Huofeng by 5-10%.

Drawings

Fig. 1 is a schematic view (perspective view) of the overall structure of a burner having low swirl combustion characteristics according to the present invention.

FIG. 2 is a schematic view of a burner with low swirl combustion characteristics according to the present invention in a disassembled configuration.

Fig. 3 is a partial cut-away sectional structural view (one view) of a burner having low swirl combustion characteristics according to the present invention.

Fig. 4 is a partial cut-away sectional structural view (another view) of a burner having low swirl combustion characteristics according to the present invention.

FIG. 5 is a schematic view of the combustion state of the combustor with low swirl combustion characteristics according to the present invention.

Fig. 6 is a partial cross-sectional view of fig. 5.

FIG. 7 is a view showing a structure of mounting a burner and a base having a low swirl combustion characteristic according to the present invention.

Fig. 8 is a schematic view showing an embodiment of a portable outdoor furnace using the burner having a low vortex combustion characteristic according to the present invention.

Detailed Description

As shown in fig. 1-7, are specific embodiments of a combustor having low swirl combustion characteristics implemented in accordance with the present invention. Other conventional modifications and designs according to the person skilled in the art are within the scope of the inventive concept.

A burner with low swirl combustion characteristics, embodied in accordance with the present invention, includes at least: the device comprises an upper cover 1, a lower cover 2, a Venturi mixing pipe 3 and a nozzle throat pipe assembly 4;

the upper cover 1 and the lower cover 2 are both circular semi-volute spiral disc bodies, and the air inlet channel is smoothly combined with the volute from the horizontal tangential direction of the circular volute to form an integrated cover body;

the upper cover 1 and the lower cover 2 are mutually buckled into a whole with a volute combustion space, and the air inlet channel is communicated with the Venturi mixing pipe 3; the outer end of the Venturi mixing pipe 3 is connected with a nozzle throat pipe component 4;

the circular volutes of the upper cover 1 and the lower cover 2 are spirally formed into eccentric centers, and eccentric holes (11 and 21) which can be mutually butted and communicated are respectively arranged at the eccentric centers of the upper cover (1) and the lower cover (2); a plurality of through hole-shaped combustion holes 6 are arranged on the disc surface of the upper cover 1 at intervals around the eccentric holes (11 and 21).

The Venturi mixing pipe 3 is a pipeline with the diameter larger than that of the nozzle throat component 4, and the Venturi mixing pipe and the nozzle throat component 4 form a Venturi pipe component with the pipe diameter enlarged along the air inlet downstream direction.

Furthermore, the combustion holes 6 are distributed in a plurality of circles (3-6 circles, preferably 4 circles) of concentric circles by taking the eccentric holes of the upper cover 1 as the center of the circle, and a plurality of circles (2-4 circles, preferably 2 circles) of supplementary combustion holes are distributed in an arc shape around the outermost periphery of the combustion holes 6 distributed in the concentric circles.

Furthermore, the distance between circles of the combustion holes 6 distributed in concentric circles is 2-5 mm, and the diameter of each combustion hole is 1-2 mm; the total number of the combustion holes 6 is not less than 100, and the total area of the combustion holes 6 is not less than 120 square millimeters; the volute diameter is greater than 40 mm.

Furthermore, the upper cover 1 has no combustion hole within 10 mm of the radial distance from the center of the eccentric hole. The diameter of the eccentric hole is 3-8 mm, preferably 5 mm.

The upper cover 1 and the lower cover 2 are both flat plate punch formed disc bodies, and the upper cover 1 and the lower cover 2 are buckled with each other and are riveted into a whole; the eccentric bores (11 and 21) each have a vertical wall extending towards the interior of the volute-like combustion space, the two vertical walls being connected by welding.

Further, the total length of the venturi mixing pipe 3 is not less than 50 mm, and the inner diameter of the pipe is more than 6 mm.

Furthermore, air inlet holes 44 are circumferentially arranged on the nozzle throat component 4, the total number of the air inlet holes 44 is 4-6, and the aperture is larger than 3 mm. Preferably, the inlet holes are arranged circumferentially uniformly in the plane of the cylinder of the nozzle throat assembly 4 at a distance of 0-6 mm from the outer end face of the nozzle bore. The nozzle throat assembly 4 is formed by butt-jointing the combination of the nozzle 41 and the throat 42.

Further, the nozzle throat assembly 4 and the venturi mixing tube 3 are detachably connected by a nut 43.

Further, a strip-shaped connecting frame 5 is arranged to be connected with the upper cover 1 and/or the lower cover 2, the upper cover 1 and the lower cover 2 are fixedly connected to a base 7 with a hollow space, and a base air inlet hole 71 communicated with the hollow space is arranged on the side wall below the base 7; an external portable gas tank 8 is connected with an inlet of the nozzle throat pipe assembly 4 through a gas pipe, a valve is arranged at the joint of the gas pipe and the gas tank, and ignition is carried out from a combustion hole 6 in the hollow space of the base 7.

Furthermore, the circular volute part of the lower cover 2 is provided with two axisymmetric fixed end lugs 22, and the two fixed end lugs 22 and the tangential direction air inlet channel of the circular volute are arranged at intervals in the circumferential direction; one end of the connecting frame 5 is movably riveted with the fixed end lug or fixedly connected with the fixed end lug in other modes, and the other end of the connecting frame 5 is detachably connected with the base 7; the nozzle throat component 4 and the venturi mixing pipe 3 are connected to form a venturi component which extends into the base from a through hole on the side wall of the base 7 and is suspended and erected in the hollow space of the base to be communicated with a tangential direction air inlet channel of the circular volute.

The base 7 is preferably cylindrical, a plurality of air inlets are uniformly formed in the side wall, at least one circle of air inlets are preferably arranged in the circumferential direction, and the number of the air inlets can be adjusted according to the combustion efficiency.

As shown in FIGS. 5 and 6, the arrangement of the combustion holes 6 prevents the possibility of combustion backfire, so that the whole combustion surface is burnt, the combustion flame 61 is stably exerted, and the possibility of fire escape is prevented.

The gas enters the throat part of the Venturi assembly of the invention from the nozzle 41 to be mixed with air, the mixed gas is sprayed along the Venturi assembly and then reaches the combustion space between the upper cover and the lower cover of the head part of the combustor, the gas enters along the tangential direction gas inlet channel, the speed of the gas overflowing along the outer ring of the circular volute is relatively high, and when the gas rotates to the innermost ring along the volute, the speed is reduced, so that the unique flame speed difference between the inner ring and the outer ring is formed. Because the structure of the combustion hole, the size of the air inlet and the total area of the fire hole of the upper cover of the combustor are accurately designed in association with the flame speeds of the inner ring and the outer ring, the flame stability of the inner ring can be ensured when the inner ring is slow and the pressure is consumed almost, and the tempering caused by the slow speed is avoided.

Fig. 8 shows an embodiment of the portable outdoor oven according to the present invention. The pot body is added on the combustion device shown in figure 7 to be combined for use. After a portable gas cylinder 8 (a standard gas cylinder, such as a commercially available gas cylinder G2 available from Taobao) shown in fig. 8 is connected to a nozzle 41 through a gas pipe 9 (preferably a soft PU plastic pipe or other material pipe, which has a high pressure resistance of 1MPA or more, a diameter of about 6 mm, and a wall thickness of about 1 mm. a pipe clamp is provided at the joint), a valve (one end of which is connected to the gas pipe 9 at the end of the gas cylinder 8, and the valve is a universal flow valve, and the gas flow is adjusted by adjusting the flow valve) is opened, ignition is performed from a combustion hole 6 of an upper cover of a burner head, and then a pot 10 is placed on the combustion device, so that the portable.