CN220249982U - Medium atomizing oil gun - Google Patents

Abstract

The utility model relates to the technical field of atomizing oil guns, and discloses a medium atomizing oil gun, which comprises an oil-gas distribution part, wherein the oil-gas distribution part is provided with an oil conveying channel for conveying fuel oil and a gas conveying channel for conveying atomizing medium, the distributed fuel oil is conveyed through the oil conveying channel, and the atomizing medium is conveyed through the gas conveying channel, and the medium atomizing oil gun further comprises: the inlet end part of the primary atomization component comprises an oil inlet and an air inlet, the outlet end part of the primary atomization component comprises a fuel spray hole connected with the oil inlet and an atomization medium spray hole connected with the air inlet, the oil inlet is connected with an oil transportation channel, the air inlet is connected with an air transportation channel, the secondary atomization component is connected to one end of the primary atomization component far away from the oil-gas distribution component, the secondary atomization component is provided with an ejection port, a mixing cavity is formed between the primary atomization component and the secondary atomization component, fuel is sprayed to the mixing cavity through the fuel spray hole, and an atomization medium is sprayed to the mixing cavity through the atomization medium spray hole.

Description

Medium atomizing oil gun

Technical Field

The utility model relates to the technical field of atomizing oil guns, in particular to a medium atomizing oil gun.

Background

In recent years, with the great application of fuel oil equipment such as boilers, kilns, heating furnaces and the like in the industrial field and the protrusion of the foreign military in the petrochemical industry, environmental and energy problems are more focused.

The conventional oil gun atomization mode is mainly to atomize the fuel oil by centrifugal force generated by fuel pressure or high-speed impact of an atomization medium, the particle size of the atomized fuel oil is generally more than 100 mu m, the atomization effect is poor, and the fuel oil is often insufficiently combusted when the fuel oil is sprayed out from a gun body spray outlet and is mixed with combustion-supporting air for combustion, so that the position of the gun body spray outlet is coked, and long-term operation of the oil gun cannot be ensured.

Disclosure of Invention

In order to solve the technical problems described above, or at least partially solve the technical problems described above, the present disclosure provides a medium atomizing oil gun.

The present disclosure provides a medium atomizing oil gun, including being used for distributing the oil gas distribution part of fuel and atomizing medium according to the proportion, oil gas distribution part has the defeated gas channel of the defeated oil channel of carrying the fuel and carrying atomizing medium, and the fuel after the distribution is carried through defeated gas channel, and atomizing medium is carried through defeated gas channel, still includes:

the primary atomization component is provided with a central axis and comprises an inlet end part and an outlet end part connected with the inlet end part along the central axis, the inlet end part comprises an oil inlet and an air inlet, the outlet end part comprises a fuel spray hole connected with the oil inlet and an atomization medium spray hole connected with the air inlet, the fuel spray hole is positioned at one side of the atomization medium spray hole far away from the central axis, the oil inlet is connected with an oil transportation channel, and the air inlet is connected with an air transportation channel;

the secondary atomization component is connected to one end of the primary atomization component, which is far away from the oil-gas distribution component, the secondary atomization component is provided with an ejection port, a mixing cavity is formed between the primary atomization component and the secondary atomization component, fuel oil is ejected to the mixing cavity through the fuel oil ejection hole, an atomization medium is ejected to the mixing cavity through the atomization medium ejection hole, the fuel oil and the atomization medium are mixed in the mixing cavity to form a mixture, and the mixture is ejected from the ejection port after being atomized by the secondary atomization component.

Optionally, the atomizing medium orifice is a plurality of, and a plurality of atomizing medium orifices are arranged in a radial form with a point on the central axis extension line as the center, and the fuel orifice is a plurality of, and a plurality of fuel orifices are concentric with a plurality of atomizing medium orifices, and a plurality of fuel orifices surround in the periphery of atomizing medium orifice, and fuel orifice and atomizing medium orifice staggered arrangement.

Optionally, the included angle between the central axis of the fuel spray hole and the central axis is 10-90 degrees, and the included angle between the central axis of the atomized medium spray hole and the central axis is 10-90 degrees.

Optionally, the number of fuel spray holes and atomization medium spray holes is larger than one.

Optionally, a central medium channel is formed between the primary atomizing component and the secondary atomizing component, one end of the central medium channel is connected with the air inlet, the other end of the central medium channel is connected with the ejection port, the central medium channel is coaxial with the central axis, and the atomized medium is ejected from the ejection port through the central medium channel.

Optionally, the central medium channel has first linkage segment, second linkage segment and third linkage segment that connect gradually, and part of first linkage segment is located one-level atomizing part, and another part of first linkage segment and second linkage segment and third linkage segment are located second level atomizing part, and first linkage segment is the cylinder hole, and the second linkage segment is the diameter and is less than the cylinder hole of first linkage segment, and the third linkage segment is the circular cone hole, and the third linkage segment is connected with the jet.

Optionally, the included angle of the cross section outline of the third connecting section along the central axis ranges from 40 degrees to 120 degrees.

Optionally, the oil gun further comprises an oil pipe for conveying the fuel oil to the oil conveying channel and an atomization medium guide pipe for conveying the atomization medium to the gas conveying channel, wherein at least two atomization medium guide pipes are arranged, the oil conveying channel is provided with an oil inlet and an oil outlet, the oil pipe is connected with the oil inlet, the oil inlet is connected with the oil outlet, the gas conveying channel is provided with an air inlet and an air outlet, the atomization medium guide pipe is connected with the air inlet, the air inlet is connected with the air outlet, and the oil pipe is positioned on one side, far away from the central axis extension line, of the atomization medium guide pipe.

Optionally, two oil pipes are symmetrically distributed on two sides of the atomizing medium conduit.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the medium atomization oil gun provided by the embodiment of the disclosure, the medium is subjected to medium internal mixing atomization theory, the mechanism is that an atomization medium and fuel oil are subjected to high-speed impact mixing in a mixing cavity to form fully atomized gas-liquid mixed fluid with small particle size, and according to the atomization theory, the embodiment of the disclosure is combined on an oil-gas distributor according to gas-liquid parameter distribution ratio, meanwhile, a mixing cavity is directly formed between a primary atomizer and a secondary atomizer, so that the atomization medium and the fuel oil enter the mixing cavity through an atomization medium spray hole and a fuel oil spray hole respectively, the fuel oil and the mixing medium are subjected to strong multiple impact atomization in the mixing cavity to form a mixture of the fuel oil and the atomization medium, and then the mixture is sprayed out through a spray hole of the secondary atomizer to form oil mist with particle size not larger than 40 mu m, and then the oil mist is fully mixed with combustion air to enable the combustion to be more sufficient, so that the energy-saving purpose is achieved, coking at the spray hole position is avoided, the mixing cavity between the primary atomizer and the secondary atomizer plays a role of balance pressure, the regulation ratio of 1:10 can be realized, the maximum output can reach more than 5000kg/h, the regulation ratio in a conventional mode is generally smaller, and is generally 1:4, and the fuel consumption is generally more than 15% and the fuel consumption is high.

Drawings

FIG. 1 is an exploded view of a media atomizing oil gun provided in an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of a media atomizing oil gun provided in an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an oil vapor distributor provided in an embodiment of the present disclosure;

FIG. 4a is a cross-sectional view of a primary atomizer provided by an embodiment of the present disclosure;

FIG. 4b is a side view provided by an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a secondary atomizer provided in an embodiment of the present disclosure;

fig. 6 is an enlarged schematic view of the structure at b in fig. 2.

Reference numerals illustrate:

1-oil gas distribution part, 10-oil transportation channel, 100-oil inlet, 101-oil outlet, 110-air inlet, 111-air outlet, 11-air transportation channel, 12-oil liquid channel, 13-medium channel, 2-primary atomization part, 20-oil inlet, 21-air inlet, 22-fuel spray hole, 23-atomization medium spray hole, 3-secondary atomization part, 30-spray hole, 4-mixing cavity, 5-central medium channel, 50-first connecting section, 51-second connecting section, 52-third connecting section, 6-oil pipe, 7-atomization medium conduit and 8-nut.

Detailed Description

One embodiment of the present utility model will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present utility model is not limited by the embodiment.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In recent years, with the great application of fuel oil equipment such as boilers, kilns, heating furnaces and the like in the industrial field and the protrusion of the foreign military in the petrochemical industry, environmental and energy problems are more focused.

The conventional oil gun atomization mode is mainly to atomize the fuel oil by centrifugal force generated by fuel pressure or high-speed impact of an atomization medium, the particle size of the atomized fuel oil is generally more than 100 mu m, the atomization effect is poor, and the fuel oil is often insufficiently combusted when the fuel oil is sprayed out from a gun body spray outlet and is mixed with combustion-supporting air for combustion, so that the position of the gun body spray outlet is coked, and long-term operation of the oil gun cannot be ensured.

Therefore, the embodiment of the disclosure provides a medium atomizing oil gun, which can fully mix fuel oil and an atomizing medium to form oil mist with the particle size not more than 40 μm, and fully mix and burn with combustion air, so that the combustion is more sufficient, and the purpose of energy saving is realized while the position coking of an ejection port is avoided.

The present disclosure is illustrated by the following several specific examples. Detailed descriptions of known functions and known components may be omitted for the sake of clarity and conciseness in the following description of the embodiments of the present disclosure. When any element of an embodiment of the present disclosure appears in more than one drawing, the element may be referred to by the same reference numeral in each drawing.

Fig. 1 is an exploded view of a medium atomizing oil gun according to an embodiment of the present disclosure, fig. 2 is a cross-sectional view of a medium atomizing oil gun according to an embodiment of the present disclosure, fig. 3 is a schematic structural view of an oil vapor distributor according to an embodiment of the present disclosure, fig. 4a is a cross-sectional view of a primary atomizer according to an embodiment of the present disclosure, fig. 4b is a side view according to an embodiment of the present disclosure, fig. 5 is a schematic structural view of a secondary atomizer according to an embodiment of the present disclosure, and fig. 6 is an enlarged schematic structural view at b in fig. 2.

As shown in fig. 1 to 5, at least one embodiment of the present disclosure provides a medium atomizing oil gun, including an oil-gas distribution part 1 for distributing fuel and an atomizing medium in proportion, the oil-gas distribution part 1 having an oil delivery passage 10 for delivering fuel and an air delivery passage 11 for delivering an atomizing medium, the distributed fuel being delivered through the oil delivery passage 10, the atomizing medium being delivered through the air delivery passage 11, characterized by further comprising a primary atomizing part 2 and a secondary atomizing part 3, the primary atomizing part 2 having a central axis and including an inlet end and an outlet end connected to the inlet end along the central axis, the inlet end including an oil inlet 20 and an air inlet 21, the outlet end including a fuel spray orifice 22 connected to the oil inlet 20 and an atomizing medium spray orifice 23 connected to the air inlet 21, the fuel spray orifice 22 being located on a side of the atomizing medium spray orifice 23 remote from the central axis, the oil inlet 20 being connected to the oil delivery passage 10, the air inlet 21 being connected to the air delivery passage 11, the secondary atomizing part 3 being connected to an end of the primary atomizing part 2 remote from the oil delivery passage 11, the secondary atomizing part 3 having a spray orifice 30, the mixture being formed between the primary atomizing part 2 and the secondary atomizing part 3 and the spray orifice 4 into the mixture of the mixture from the spray orifice 4 through the spray orifice 4 to the atomized mixture of the fuel and the atomized medium after the mixture is sprayed from the spray orifice 4 into the spray orifice 4.

It should be understood that the atomizing medium may be air or steam, the inlet end of the oil delivery channel 10 is connected with the fuel delivery source, the outlet end of the oil delivery channel 10 is connected with the oil inlet of the primary atomizing component so as to deliver the fuel to the inside of the primary atomizing component, the inlet end of the air delivery channel 11 is connected with the atomizing medium delivery source, the outlet end of the air delivery channel 11 is connected with the air inlet of the primary atomizing component so as to deliver the atomizing medium to the inside of the primary atomizing component, the primary atomizing component and the secondary atomizing component in the embodiment of the present disclosure are all existing atomizers, the basic functions are that the fuel and the atomizing medium are mixed to form oil mist, and the distribution ratio of the air and the liquid parameters is less than 1 on the oil-gas distributor: 10 The pore diameter of the air hole and the oil hole is designed (usually controlled at 8:100), the diameter of the air hole is phi 10-phi 32, the diameter of the oil hole is phi 2-phi 8 according to the different output sizes of the oil gun, so that the oil hole and the oil hole have optimal size matching, and the oil gas distribution part, the primary atomization part and the secondary atomization part are fixedly connected through the nut 8.

According to the medium atomization oil gun provided by the embodiment of the disclosure, the medium is subjected to medium internal mixing atomization theory, the mechanism is that an atomization medium and fuel oil are subjected to high-speed impact mixing in a mixing cavity to form fully atomized gas-liquid mixed fluid with small particle size, and according to the atomization theory, the embodiment of the disclosure is combined on an oil-gas distributor according to gas-liquid parameter distribution ratio, meanwhile, a mixing cavity is directly formed between a primary atomizer and a secondary atomizer, so that the atomization medium and the fuel oil enter the mixing cavity through an atomization medium spray hole and a fuel oil spray hole respectively, the fuel oil and the mixing medium are subjected to strong multiple impact atomization in the mixing cavity to form a mixture of the fuel oil and the atomization medium, and then the mixture is sprayed out through a spray hole of the secondary atomizer to form oil mist with particle size not larger than 40 mu m, and then the oil mist is fully mixed with combustion air to enable the combustion to be more sufficient, so that the energy-saving purpose is achieved, coking at the spray hole position is avoided, the mixing cavity between the primary atomizer and the secondary atomizer plays a role of balance pressure, the regulation ratio of 1:10 can be realized, the maximum output can reach more than 5000kg/h, the regulation ratio in a conventional mode is generally smaller, and is generally 1:4, and the fuel consumption is generally more than 15% and the fuel consumption is high.

Referring to fig. 4b, in the embodiment of the disclosure, a plurality of atomized medium spray holes 23 are formed, the plurality of atomized medium spray holes 23 are radially arranged with a point on the central axis extension line as a center, the plurality of fuel spray holes 22 are formed, the plurality of fuel spray holes 22 are concentric with the plurality of atomized medium spray holes 23, the plurality of fuel spray holes 22 are surrounded on the periphery of the atomized medium spray holes 23, and the fuel spray holes 22 are staggered with the atomized medium spray holes 23.

The fuel spray holes 22 and the atomized medium spray holes 23 are uniformly distributed in a staggered manner to spray the fuel and the atomized medium into the mixing cavity, and the arrangement mode can prevent the fuel and the atomized medium from interfering with each other when being sprayed into the mixing cavity at a high speed, so that the atomization effect is further improved, the full combustion is ensured, and the coking at the position of the spray hole is further avoided.

In order to avoid the mutual influence of the fuel ejected from the fuel nozzle and the atomized medium ejected from the atomized medium nozzle, in the embodiment of the present disclosure, the included angle between the central axis of the fuel nozzle 22 and the central axis is 10 ° to 90 °, and the included angle between the central axis of the atomized medium nozzle 23 and the central axis is 10 ° to 90 °, that is, in the same direction plane, as shown in fig. 4a, the included angle between the central axis of each fuel nozzle and the central axis is different, and the included angle between the central axis of each atomized medium nozzle and the central axis is also different.

Considering the mixing effect of fuel and atomized media, in the embodiment of the disclosure, the number of fuel spray holes 22 and atomized media spray holes 23 is greater than 3, the larger the number is, the more uniform the mixing is, in the specific processing process, the primary atomizer is designed into multiple channels, each fuel spray hole corresponds to one channel, and each atomized media spray hole corresponds to one channel.

The cross section of the mixing cavity can be circular, elliptical or rectangular waist-shaped, the structure does not influence the mixing effect, in the embodiment of the disclosure, the cross section of the mixing cavity is processed into a circular shape, and the whole body is annular, so that the processing is facilitated.

The inventor finds that the NOx generated by the medium fuel spray gun used in the market at present is higher, and the purposes of energy conservation and environmental protection can not be achieved.

To this end, the disclosed embodiments provide an improved approach.

A central medium channel 5 is formed between the primary atomizing part 2 and the secondary atomizing part 3, one end of the central medium channel 5 is connected with the air inlet 21, the other end of the central medium channel 5 is connected with the ejection outlet 30, the central medium channel 5 is coaxial with the central axis, and atomized medium is ejected from the ejection outlet 30 through the central medium channel 5.

The center of the primary atomizing component and the center of the secondary atomizing component are provided with a central medium channel, an atomizing medium is sprayed into the center of a combustion area through the central medium channel through a spray hole, and a large amount of heat is absorbed by the atomizing medium at high temperature, so that the temperature of the flame center is reduced, the purpose of inhibiting NOx is realized, carbon black and coking of the gun head of an oil gun due to insufficient combustion can be well removed, and the problems of nozzle blockage and coking are solved.

Referring to fig. 6, the central medium passage 5 has a first connection section 50, a second connection section 51, and a third connection section 52 connected in this order, a part of the first connection section 50 is located at the primary atomizing member 2, another part of the first connection section 50 and the second connection section 51 and the third connection section 52 are located at the secondary atomizing member 3, the first connection section 50 is a cylindrical hole, the second connection section 51 is a cylindrical hole having a smaller diameter than the first connection section 50, the third connection section 52 is a conical hole, and the third connection section 52 is connected with the ejection port 30.

Specifically, the cross section of the central medium channel may be circular, elliptical, waist-shaped or star-shaped, and the whole design is that the front end is of a zoom structure, so as to improve the jet velocity and realize conical jet, and the central medium channel may be one or more.

In the embodiment of the present disclosure, the included angle of the outer profile of the cross section of the third connecting section 52 along the central axis ranges from 40 ° to 120 °, and in general, the larger the angle is, the larger the coverage area after spraying is, but the angle is too large, which causes the reduction of the spraying speed of the atomized medium, so that the decoking effect is weakened, so in the embodiment of the present disclosure, the angle is selected from 40 ° to 120 °, which ensures the coverage area and the spraying speed, and further ensures the decoking effect.

At present, a common medium atomizing oil gun oil pipe and an atomizing medium conduit are coaxially arranged, but the oil gun is blocked and coked due to the fact that the temperature of the fuel oil is increased due to the fact that the temperature of the atomizing medium is high, and accordingly fuel oil is carbon-separated.

To this end, the embodiment of the disclosure provides an improvement, the oil gun further includes an oil pipe 6 for delivering fuel to the oil delivery channel 10 and an atomized medium conduit 7 for delivering atomized medium to the gas delivery channel 11, the atomized medium conduits 7 are not less than two, the oil delivery channel 10 has an oil inlet 100 and an oil outlet 101, the oil pipe 6 is connected with the oil inlet 100, the oil inlet 20 is connected with the oil outlet 101, the gas delivery channel 11 has an air inlet 110 and an air outlet 111, the atomized medium conduit 7 is connected with the air inlet 110, the air inlet 21 is connected with the air outlet 111, and the oil pipe 6 is located at a side of the atomized medium conduit 7 far away from the extension line of the central axis.

The oil pipe is arranged at the periphery of the atomizing medium conduit, and a certain distance is reserved between the oil pipe and the atomizing medium conduit, so that the coaxial arrangement mode of the oil pipe of the conventional medium atomizing oil gun and the atomizing medium conduit is changed, and the phenomenon that the oil gun is blocked and coked due to high temperature carbon precipitation of fuel oil caused by high temperature of the atomizing medium can be avoided.

Specifically, the two oil pipes 6 are symmetrically distributed on two sides of the atomizing medium conduit 7, and the structure of arranging a plurality of oil pipes is complex and the volume is large, so in the embodiment of the disclosure, two oil pipes are selected, the distance is not in a range, and only the two oil pipes are not in contact with each other.

According to the medium atomization oil gun, the momentum of fuel oil and an atomization medium is fully utilized, materials of high-speed jet flow in the mixing cavity of the oil gun nozzle are impacted for multiple times, so that tiny-particle-size liquid drops are formed, full combustion of fuel is achieved, the fuel and the atomization medium can be respectively fed into the oil-gas distributor, meanwhile, an oil pipe and an atomization medium pipe can be exchanged, the fuel and the atomization medium are conveyed to the oil-gas distributor through pipelines and uniformly enter the primary atomization component, the primary atomization component sprays the fuel and the atomization medium into the mixing cavity formed by combining the primary atomization component and the secondary atomization component through jet holes distributed in a staggered mode, and the fuel and the mixing medium are impacted and atomized for multiple times in the mixing cavity to form a mixture of the fuel and the atomization medium. The fuel oil and the atomizing medium form mixed fluid in the mixing cavity, and then are sprayed out after being secondarily atomized through the spray holes with the angles designed by the secondary atomizer, so that oil mist with very small particle size is generated, combustion is sufficient, the purposes of environmental protection and energy saving are achieved, and meanwhile, the position of the spray hole is prevented from coking.

The foregoing disclosure is merely illustrative of some embodiments of the utility model, but the embodiments are not limited thereto and variations within the scope of the utility model will be apparent to those skilled in the art.

Claims (9)

1. A medium atomizing oil gun comprising an oil gas distribution part (1) for distributing fuel oil and an atomizing medium in proportion, wherein the oil gas distribution part (1) is provided with an oil delivery channel (10) for delivering the fuel oil and a gas delivery channel (11) for delivering the atomizing medium, the fuel oil after being distributed is delivered through the oil delivery channel (10), and the atomizing medium is delivered through the gas delivery channel (11), and the medium atomizing oil gun is characterized by further comprising:

the primary atomization component (2) is provided with a central axis and comprises an inlet end part and an outlet end part connected with the inlet end part along the central axis, the inlet end part comprises an oil inlet (20) and an air inlet (21), the outlet end part comprises a fuel spray hole (22) connected with the oil inlet (20) and an atomization medium spray hole (23) connected with the air inlet (21), the fuel spray hole (22) is positioned at one side of the atomization medium spray hole (23) far away from the central axis, the oil inlet (20) is connected with the oil conveying channel (10), and the air inlet (21) is connected with the air conveying channel (11);

the secondary atomizing component (3) is connected to the primary atomizing component (2) and is far away from one end of the oil gas distribution component (1), the secondary atomizing component (3) is provided with an ejection port (30), a mixing cavity (4) is formed between the primary atomizing component (2) and the secondary atomizing component (3), fuel is sprayed to the mixing cavity (4) through the fuel spray hole (22), an atomizing medium is sprayed to the mixing cavity (4) through the atomizing medium spray hole (23), the fuel and the atomizing medium are mixed in the mixing cavity (4) to form a mixture, and the mixture is sprayed out of the ejection port (30) after being atomized through the secondary atomizing component (3).

2. The medium atomized oil gun according to claim 1, wherein the atomized medium spray holes (23) are plural, the atomized medium spray holes (23) are radially arranged with a point on the central axis extension line as a center, the fuel spray holes (22) are plural, the fuel spray holes (22) are concentric with the atomized medium spray holes (23), the fuel spray holes (22) are surrounded on the periphery of the atomized medium spray holes (23), and the fuel spray holes (22) are staggered with the atomized medium spray holes (23).

3. Medium atomizing oil gun according to claim 2, characterized in that the angle between the centre axis of the fuel nozzle (22) and the centre axis is 10-90 °, and that the angle between the centre axis of the atomizing medium nozzle (23) and the centre axis is 10-90 °.

4. A media atomizing oil gun according to claim 3, characterized in that the number of fuel nozzles (22) and atomizing media nozzles (23) is greater than 3.

5. Medium atomizing oil gun according to claim 1 or 4, characterized in that a central medium channel (5) is formed between the primary atomizing member (2) and the secondary atomizing member (3), one end of the central medium channel (5) is connected with the air inlet (21), the other end of the central medium channel (5) is connected with the ejection port (30), the central medium channel (5) is coaxial with the central axis, and the atomized medium is ejected from the ejection port (30) through the central medium channel (5).

6. Medium atomizing oil gun according to claim 5, characterized in that the central medium channel (5) has a first connecting section (50), a second connecting section (51) and a third connecting section (52) connected in sequence, a part of the first connecting section (50) being located at the primary atomizing member (2), another part of the first connecting section (50) and the second connecting section (51) and the third connecting section (52) being located at the secondary atomizing member (3), the first connecting section (50) being a cylindrical hole, the second connecting section (51) being a cylindrical hole having a smaller diameter than the first connecting section (50), the third connecting section (52) being a conical hole, the third connecting section (52) being connected with the ejection port (30).

7. A media atomizing oil gun as set forth in claim 6, wherein said third connecting section (52) has a cross-sectional profile angle along said central axis in the range of 40 ° to 120 °.

8. Medium atomizing oil gun according to claim 1 or 4 or 7, characterized in that the oil gun further comprises an oil pipe (6) for transporting fuel to the oil transporting channel (10) and an atomizing medium conduit (7) for transporting the atomizing medium to the gas transporting channel (11), the atomizing medium conduit (7) is not less than two, the oil transporting channel (10) has an oil inlet (100) and an oil outlet (101), the oil pipe (6) is connected with the oil inlet (100), the oil inlet (20) is connected with the oil outlet (101), the gas transporting channel (11) has an air inlet (110) and an air outlet (111), the atomizing medium conduit (7) is connected with the air inlet (110), the air inlet (21) is connected with the air outlet (111), and the oil pipe (6) is located at a side of the atomizing medium conduit (7) away from the central axis extension.

9. Medium atomizing oil gun according to claim 8, characterized in that said oil pipes (6) are two, and that said two oil pipes (6) are symmetrically distributed on both sides of said atomizing medium conduit (7).