CN217057517U - Spray gun, combustor and asphalt plant - Google Patents

Abstract

The application provides a spray gun, combustor and asphalt plant, it is poor to have solved the atomization effect when prior art spray gun fuel sprayer is big, the technical problem of fuel can not the abundant burning. The air is sprayed out from a first compressed air channel formed between the second sleeve and the first sleeve to enter a first mixing chamber, and after the fuel oil enters the first mixing chamber through a fuel oil channel, the fuel oil collides with the air in the first mixing chamber in the atomization structure to be atomized; because a first compressed air channel is formed between the second sleeve and the first sleeve, and a fuel oil channel is formed in the second sleeve, the air of the first compressed air channel is uniformly sprayed out in the circumferential direction by taking the first sleeve as a center, and the fuel oil of the fuel oil channel is uniformly sprayed out in the circumferential direction by taking the second sleeve as a center, namely, the air and the fuel oil are uniformly sprayed out, the air and the fuel oil can be uniformly collided, the atomization effect of the fuel oil and the air is improved, and the fuel oil can be sufficiently combusted.

Description

Spray gun, combustor and asphalt plant

Technical Field

The application relates to the field of engineering machinery, in particular to a spray gun, a burner and an asphalt station.

Background

At present, heavy oil is used as fuel for an asphalt station fuel oil burner, and compressed air is used as an atomizing medium, so that the fuel is atomized in a spray gun and then is burnt; because the quality of heavy oil is poor, the heavy oil contains more impurities and has higher viscosity, the oil way and the nozzle of a combustor are often blocked, the heavy oil atomization effect is poor, and the fuel oil is not fully combusted.

In the prior art, the spray gun adopts the internal mixing atomization mode, the compressed air sprayed from the compressed air outlet hole is not uniformly distributed in the circumferential direction of the spray gun nozzle, and when the fuel injection quantity is large, the atomization effect is poor, so that the fuel cannot be sufficiently combusted, and the nozzle of the combustor is blocked.

SUMMERY OF THE UTILITY MODEL

In view of this, this application provides a spray gun and combustor, has solved prior art spray gun fuel injection quantity when big atomization effect is poor, the technical problem that the fuel can not fully burn.

According to one aspect of the application, a spray gun comprises: the first sleeve is externally sleeved with a spray gun nozzle; the second sleeve is arranged in the first sleeve, a fuel oil channel is formed in the second sleeve, and a first compressed air channel is formed between the second sleeve and the first sleeve; the atomization structure is positioned at the end part of the second sleeve and is abutted against the spray gun nozzle; wherein the atomizing structure has a first mixing chamber that communicates with the first compressed air passage, and the fuel passage communicates with the first mixing chamber.

In one possible implementation, the atomizing structure includes: the first atomizing piece is arranged at the end part of the second sleeve at one end; the second atomizing part is sleeved outside the other end of the first atomizing part, a first channel is formed between the second atomizing part and the first atomizing part, and the first channel is communicated with the first mixing chamber; and the first air inlet is arranged on the second atomization piece and is used for communicating the first compressed air channel with the first channel.

In one possible implementation, the atomizing structure further includes: one end of the third atomization piece is sleeved outside the second atomization piece, the other end of the third atomization piece is positioned inside the spray gun nozzle and is abutted against the inner wall of the spray gun nozzle, a second channel is formed between the third atomization piece and the second atomization piece, and the second channel is communicated with the first mixing chamber; and the second air inlet hole is formed in the third atomizing part and is used for communicating the first compressed air channel with the second channel.

In one possible implementation, the first channel comprises a first tapered channel; and/or the second channel comprises a second tapered channel.

In one possible implementation, the first atomizing member includes: a first atomizing body portion, one end of which is disposed at an end of the second sleeve; the first atomization limiting part is arranged at the other end of the first atomization body part and connected with the outer surface of the first atomization body part; the second atomizing member includes: one end of the second atomization body part is sleeved with the first atomization limiting part; the second atomization limiting part is arranged at the other end of the second atomization body part and connected with the outer surface of the second atomization body part; wherein, the first air inlet is arranged on the second atomization body part.

In one possible implementation, the third atomizing member includes: one end of the third atomization body part is sleeved with the second atomization limiting part, and the other side of the third atomization body part is abutted to the spray gun nozzle; wherein, the second air inlet is arranged on the third atomization body part.

In one possible implementation, the spray gun body further comprises: a third sleeve having a second compressed air passage formed therein; the first through hole is formed in one end of the second sleeve; one end of the third sleeve penetrates through the first through hole to the inside of the first atomizing piece and extends to one end, close to the first atomizing piece, of the first mixing chamber through the first atomizing piece; a third channel is formed between the third sleeve and the first atomizing part; one end of the third channel is communicated with the fuel oil channel, and the other end of the third channel is communicated with the first mixing chamber.

In one possible implementation, the spray gun nozzle comprises: a spray gun nozzle body having a cavity; the target nail is arranged on the inner wall of the spray gun nozzle body, the target nail is arranged right opposite to the first mixing chamber, and the target nail is used for rebounding fuel sprayed from the fuel channel.

As a second aspect of the present application, a burner is characterized by comprising: a fuel inlet; a compressed air inlet; and a lance as claimed in any one of the preceding claims for injecting combusted fuel and air.

As a third aspect of the present application, an asphalt plant comprising a burner as described above.

According to the spray gun, the burner and the asphalt station, air is sprayed out through a first compressed air channel formed between a second sleeve and a first sleeve to enter a first mixing chamber, and after fuel oil enters the first mixing chamber through a fuel oil channel, the fuel oil collides with the air in the first mixing chamber in an atomization structure to be atomized; because a first compressed air channel is formed between the second sleeve and the first sleeve, and a fuel oil channel is formed in the second sleeve, the air of the first compressed air channel is uniformly sprayed out in the circumferential direction by taking the first sleeve as a center, and the fuel oil of the fuel oil channel is uniformly sprayed out in the circumferential direction by taking the second sleeve as a center, namely the air and the fuel oil are uniformly sprayed out, the air and the fuel oil can uniformly collide with each other, the atomization effect of the fuel oil and the air is improved, and the fuel oil can be sufficiently combusted.

Drawings

FIG. 1 is a schematic view of a spray gun according to the present application;

FIG. 2 is a schematic view of a combustor according to the present disclosure;

fig. 3 is a schematic perspective view of a burner according to the present disclosure.

Description of reference numerals:

1. a spray gun body; 10. a first sleeve; 101. a first compressed air passage; 11. a second sleeve; 111. A fuel oil passage; 112. a first through hole; 12. an atomizing structure; 121. a first mixing chamber; 122. a first atomizing member; 1221. a first atomizing body part; 1222. a first atomization limiting part; 1223. a second through hole; 123. a second atomizing member; 1231. a first air intake hole; 1232. a second atomizing body portion; 1233. a second atomization limiting part; 124. a first channel; 125. a third atomizing member; 1251. a second air intake hole; 1252. A third atomizing body portion; 126. a second channel; 13. a third sleeve; 131. a second compressed air passage; 132. a third channel; 2. a spray gun nozzle; 21. a spray gun nozzle body; 22. target nail; 23. a second mixing chamber; 24. an outlet aperture; 3. an elastic device; 4. a fastening device; 5. a fuel inlet; 6. a compressed air inlet.

Detailed Description

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. In the embodiments of the present application, all directional indicators such as upper, lower, left, right, front, rear, top, bottom … … are used only for explaining the relative positional relationship between the respective members, the movement thereof, and the like at a certain posture (as shown in the drawings), and if the certain posture is changed, the directional indicator is changed accordingly.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic structural view of a spray gun provided in the present application, and fig. 2 is a schematic structural view of a burner provided in the present application, and as shown in fig. 1 and fig. 2, the spray gun includes: a spray gun body 1; the spray gun nozzle 2 is arranged at the end part of the spray gun body 1; wherein, spray gun body 1 includes: the spray gun comprises a first sleeve 10, wherein a spray gun nozzle 2 is sleeved outside the first sleeve 10; a second sleeve 11 arranged inside the first sleeve 10, a fuel passage 111 is formed inside the second sleeve 11, and a first compressed air passage 101 is formed between the second sleeve 11 and the first sleeve 10; the atomizing structure 12 is positioned at the end part of the second sleeve 11, and the atomizing structure 12 is abutted against the spray gun nozzle 2; the atomizing structure 12 has a first mixing chamber 121, the first mixing chamber 121 is communicated with the first compressed air channel 101, the fuel channel 111 is communicated with the first mixing chamber 121, and the air and the fuel enter the first mixing chamber 121 of the atomizing structure 12 to collide to atomize the fuel. Air is sprayed into a first mixing chamber 121 through a first compressed air channel 101 formed between the second sleeve 11 and the first sleeve 10, and after fuel enters the first mixing chamber 121 through a fuel channel 111, the fuel collides with the air in the first mixing chamber 121 in the atomization structure 12 to be atomized; because form first compressed air passageway 101, the inside fuel passageway 111 that forms of second sleeve 11 between second sleeve 11 and the first sleeve 10, the air of its first compressed air passageway 101 uses first sleeve 10 as the center evenly to spout in circumference, and blowout air, fuel are even promptly, therefore air and fuel can evenly bump to improve the atomizing effect of fuel and air, and then make the fuel can fully burn.

The first sleeve 10 may be a cylinder or a square cylinder having axisymmetrical characteristics, and the specific structure of the first sleeve 10 is not limited to be able to uniformly discharge the air in the first compressed air passage 101 in the circumferential direction around the first sleeve 10.

The second sleeve may be a cylinder or a square cylinder having an axisymmetrical characteristic, and the specific structure of the second sleeve 20 is not limited to be able to uniformly discharge the fuel in the fuel passage 111 in the circumferential direction around the second sleeve 11.

In one possible implementation, as shown in fig. 1 and 2, the atomizing structure 12 includes: a first atomizing member 122, the first atomizing member 122 being provided at an end of the second sleeve 11; the second atomization piece 123 is sleeved outside the first atomization piece 122, a first channel 124 is formed between the second atomization piece 123 and the first atomization piece 122, and the first channel 124 is communicated with the first mixing chamber 121; and a first air inlet hole 1231 opened on the second atomization member 123, wherein the first air inlet hole 1231 is used for communicating the first compressed air channel 101 and the first channel 124. After the air enters the first compressed air channel 101, the air flows into the first channel 124 through the first air inlet 1231, is uniformly sprayed out in the circumferential direction by taking the first sleeve 10 as the center, enters the first mixing chamber 121, and collides with the fuel which passes through the fuel channel 111, enters the first mixing chamber 121 after being uniformly sprayed out in the circumferential direction by taking the second sleeve 11 as the center, namely the air collides with the fuel for the first time in the first mixing chamber 121, namely the fuel is atomized for the first time, so that the particle size of the fuel is reduced.

In one possible implementation, as shown in fig. 1 and 2, the atomizing structure 12 further includes: one end of the third atomization member 125 is sleeved outside the second atomization member 123, and the other end of the third atomization member 125 abuts against the spray gun nozzle 2 to prevent the air in the first compressed air channel 101 from entering the spray gun nozzle 2; a second channel 126 is formed between the third atomizing member 125 and the second atomizing member 123; and a second air intake hole 1251 opened in the third atomizing member 125, the second air intake hole 1251 being for communicating the first compressed-air passage 101 with the second passage 126. After entering the first compressed air channel 101, the air cannot directly enter the interior of the gun nozzle 2, and needs to flow into the second channel 126 through the second air inlet 1251 and then enter the gun nozzle 2, and collide with the fuel oil entering the first mixing chamber 121 through the fuel oil channel 111 to the gun nozzle 2, namely the air and the fuel oil collide for the second time in the gun nozzle 2, so that the secondary atomization of the fuel oil is realized, the collision frequency of the fuel oil and the air is increased, the atomized particles of the fuel oil are finer, and the blockage of the fuel nozzle is avoided; meanwhile, the fuel oil is more fully combusted, and the waste of the fuel oil is avoided.

In a possible implementation manner, as shown in fig. 1 and fig. 2, the second atomizing element 123 is provided with at least one first air inlet hole 1231, that is, the first air inlet holes 1231 may be one or more; the plurality of first air inlet holes 1231 are formed, so that more air enters the first channel 124 through the first air inlet holes 1231 and collides with the fuel sprayed from the fuel channel 111, and the fuel is atomized.

The third atomizing member 125 is provided with at least one second air inlet hole 1251, that is, the second air inlet holes 1251 may be one or more; a plurality of second intake holes 1251 are formed to allow more air to enter the second passage 126 through the second intake holes 1251 and collide with the fuel injected from the fuel passage 111, thereby atomizing the fuel.

In one possible implementation, as shown in fig. 1 and 2, the first channel 124 comprises a first tapered channel; the conical channel is adopted, so that the area for air circulation can be increased; the first passages 124 can be uniformly distributed in the circumferential direction with the first sleeve 10 as the center, so that the sprayed air has a large area and is uniformly sprayed into the first mixing chamber 121 to collide with the fuel, that is, the fuel and the air are uniformly collided, so as to atomize the fuel; thereby enabling the fuel to be fully combusted, saving the use of the fuel and avoiding the waste of the fuel; meanwhile, the atomization effect of the fuel oil is improved.

The second passage 126 comprises a second tapered passage; similarly, the second conical channel can increase the air circulation area; the second passages 126 are also uniformly distributed in the circumferential direction by taking the first sleeve 10 as a center, so that air is uniformly sprayed into the spray gun nozzle 2 in a large area and collides with fuel oil, that is, the fuel oil and the air are more uniformly collided for the second time, and the particle size of the fuel oil is further reduced; therefore, the fuel oil is more fully combusted, the use of the fuel oil is further saved, and the waste of the fuel oil is avoided; meanwhile, the atomization effect of the fuel oil is improved.

It should be noted that the second passage 1226 includes a second tapered passage, where the second tapered passage may be a conical passage or a square tapered passage, and a specific tapered structure of the second tapered passage is not limited, so as to increase an air flow area.

In one possible implementation, as shown in fig. 1 and 2, the first atomizing member 122 includes: a first atomizing body portion 1221, one end of the first atomizing body portion 1221 being disposed at an end of the second sleeve 11; the first atomization limiting part 1222 is arranged at the other end of the first atomization body part 1221, and the first atomization limiting part 1222 is connected with the outer surface of the first atomization body part 1221;

the second atomizing member 123 includes: one end of the second atomizing body part 1232 is sleeved with the first atomizing limiting part 1222; so that the second atomizing member 123 can be fixedly sleeved outside the first atomizing member 122; so that a first channel 124 can be formed between the first atomizing member 122 and the second atomizing member 123, and the air of the first compressed air channel 101 flows through the first channel 124 to the first mixing chamber 121;

a second atomization limiting part 1233 disposed at the other end of the second atomization body part 1232, where the second atomization limiting part 1233 is connected to the outer surface of the second atomization body part 1232; wherein, the first air inlet 1231 is opened on the second atomization body 1232; the first air intake hole 1231 communicates the first compressed air passage 101 with the first passage 124, so that air can flow into the first mixing chamber 121, and the air collides with fuel for the first time, thereby realizing the first atomization of the fuel.

It should be noted that, the specific structure of the first atomization limiting part 1222 may be a step structure, which is mainly used to fix the second atomization piece 123 on the first atomization piece 121, prevent the second atomization piece 123 from moving and being dislocated, and avoid a gap from being generated between the first atomization piece 121 and the second atomization piece 123, so as to avoid collision between fuel and air in advance;

similarly, the specific structure of the second atomization limiting part 1233 can be a step structure, which is mainly used for fixing the third atomization piece 125 on the second atomization piece 123, preventing the third atomization piece 125 from moving and dislocating, and avoiding a gap between the third atomization piece 125 and the second atomization piece 123, so as to avoid collision of fuel and air in advance.

Optionally, the first atomizing body 1221 and the first atomizing limiting portion 1222 are integrally formed; not only can prevent to produce the clearance between first atomizing somatic part 1221 and the spacing portion 1222 of first atomizing, prevent that air and fuel from mixing, improve the independence of fuel and air, also easy to assemble.

The second atomizing body part 1232 and the second atomizing limiting part 1233 are integrally formed; not only can prevent to produce the clearance between second atomizing body portion 1232 and the spacing portion 1233 of second atomizing, prevent that air and fuel from mixing, improve the independence of fuel and air, also easy to assemble.

In one possible implementation, as shown in fig. 1 and 2, the third atomizing member 125 includes: a third atomizing body 1252, wherein one end of the third atomizing body 1252 is sleeved with the second atomizing limiting part 1233; the third atomization piece 125 can be fixedly sleeved outside the second atomization piece 123, so that a second channel 126 can be formed between the third atomization piece 125 and the second atomization piece 123, and the air in the first compressed air channel 101 flows through the second channel 126 to the spray gun nozzle 2. The other end of the third atomizing body 1252 abuts against the gun nozzle 2 to seal the third atomizing body 1252 and the gun nozzle 2, thereby preventing air from entering the gun nozzle 2 due to a gap between the third atomizing body 1252 and the gun nozzle 2. Wherein, the second air inlet 1251 is opened on the third atomizing body 1252 in a penetrating way; the second intake vent 1251 communicates the first compressed air passage 101 and the second passage 126, so that air can flow into the nozzle 2 and collide with fuel for the second time to atomize the fuel for the second time.

In one possible implementation, as shown in fig. 1 and 2, the ends of the first atomizing member 122, the second atomizing member 123, and the third atomizing member 125 near the gun nozzle 2 form a first mixing chamber 121; the first mixing chamber 121 communicates with the first passage 124 and the fuel passage 111, respectively. The air enters the first channel 124 after passing through the first compressed air channel 101, flows into the first mixing chamber 121, and collides with the fuel oil entering the first mixing chamber 121 through the fuel oil channel 111, namely the fuel oil collides with the air once, so that the fuel oil is atomized once, particles of atomized fuel oil are fine, and the fuel oil is combusted fully.

In one possible implementation, as shown in fig. 1 and 2, the spraygun body 1 further comprises: a third sleeve 13, a second compressed air passage 131 formed inside the third sleeve 13; a first through hole 112 formed at one end of the second sleeve 11; one end of the third sleeve 13 passes through the first through hole 112 to the first atomization member 122, and extends to one end of the first mixing chamber 121 close to the first atomization member through the first atomization member 122; a third channel 132 is formed between the third sleeve 13 and the first atomizing member 122; one end of the third passage 132 communicates with the fuel passage 111, and the other end of the third passage 132 communicates with the first mixing chamber 121. After the fuel oil passes through the second sleeve 11 to form a fuel oil channel 111, the fuel oil enters a third channel 132 and is uniformly sprayed out circumferentially by taking the first sleeve 10 as a center to enter the first mixing chamber 121, air enters the first mixing chamber 121 again through the second compressed air channel 131, and the air collides with the fuel oil in the first mixing chamber 121 to realize the third atomization of the fuel oil and reduce the particles of the fuel oil, so that the fuel oil can be fully combusted; when the fuel quantity is large, the fuel can be atomized for 3 times, so that fuel atomized particles are fine, and the fuel can be fully combusted.

The third sleeve 13 may be a cylinder or a square cylinder having axisymmetrical characteristics, and the specific structure of the third sleeve 13 is not limited to the one that can discharge air through the second compressed air passage 131 formed inside the third sleeve 13.

In one possible implementation, as shown in fig. 1 and 2, the third channel 132 is annular in cross-section. The fuel is sprayed out from the fuel channel 111 through the annular third channel 132 to enter the first mixing chamber 121 to collide with air for atomization; because the fuel is sprayed from the annular channel, the sprayed fuel is uniform and can fully collide with air, and the fuel atomization effect is improved.

Optionally, the first atomizing member 122 includes: a second through hole 1223, the second through hole 1223 being provided to penetrate along a longitudinal direction of the first atomizing body portion 1221; the third sleeve 13 passes through the first through hole 112 to the end of the first mixing chamber 121 close to the first atomizing member 122, and the outer wall of the third sleeve 13 and the second through hole 1223 form an annular third passage 132. The fuel is sprayed from the annular channel, and the sprayed fuel can be uniformly collided with air sufficiently, so that the fuel atomization effect is improved.

In one possible implementation, as shown in fig. 1 and 2, the body of the gun nozzle 2 has a cavity, and the third atomizing member 125 is located at one end of the gun nozzle 2 and forms a second mixing chamber 23 with the cavity; the second mixing chamber 23 communicates with the first mixing chamber 121; the second mixing chamber 23 communicates with the second passage 126. The fuel of the fuel passage 111 enters the first mixing chamber 121 through the annular third passage 132 and collides with the air for 2 times, and the fuel of the fuel passage 111 enters the second mixing chamber 23 through the annular third passage 132 and collides with the air of the second passage 126 for one time; that is, the fuel passage 111 enters the second mixing chamber 23 after being atomized twice in the first mixing chamber 121, the fuel and the air can continue to collide again in the second mixing chamber 23 for atomization, so that the fuel can be atomized for 3 times, the collision time of the fuel and the air can be prolonged in the second mixing chamber 23, and the particles of the fuel can be further reduced, so that the fuel can be sufficiently combusted.

In one possible implementation, as shown in fig. 1 and 2, the spray gun nozzle 2 comprises: a spray gun nozzle 2 body; and a target nail 22 provided on an inner wall of the body of the nozzle 2, the target nail 22 being disposed to face the first mixing chamber 121, the target nail 22 being for rebounding the fuel ejected from the fuel passage 111. The fuel in the fuel passage 111 enters the first mixing chamber 121 through the annular third passage 132 to collide with the air twice, that is, the fuel is atomized twice and then enters the second mixing chamber 23, and the air in the second passage 126 enters the second mixing chamber 23 to collide with the fuel again; because the target nail 22 is arranged opposite to the first mixing chamber 121, the fuel oil atomized twice from the first mixing chamber 121 and the fuel oil not atomized in the second mixing chamber 23 continuously rebound back to the second mixing chamber 23 under the action of the target nail 22 to collide with air again for atomization, so that the atomized fuel oil particles are finer; because the fuel which is not atomized from the first mixing chamber 121 and the fuel which is not atomized from the second mixing chamber 23 are rebounded to the second mixing chamber 23 under the action of the target nail 22 to be atomized continuously, namely, the fuel which is not atomized from the first mixing chamber 121 and the second mixing chamber 23 rebounds to the second mixing chamber 23 through the target nail 22, the collision frequency of the fuel is increased, the atomization time of the fuel is prolonged, the atomization effect is enhanced, the fuel can be combusted fully, the combustion efficiency is improved, and the fuel consumption is reduced.

In one possible implementation, as shown in fig. 1 and 2, the spray gun nozzle 2 further comprises: an outlet hole 24 opened in the body of the nozzle 2; wherein one end of the outlet hole 24 communicates with the second mixing chamber 23 and the other end of the outlet hole 24 communicates with the outside. After fuel enters the first mixing chamber 121 and the second mixing chamber 23 to collide for 3 times of atomization, unburned fuel rebounds to the second mixing chamber 23 under the action of the target nail 22 to collide with air again for atomization, and is sprayed out from the outlet hole 24 to burn externally to form flame.

Alternatively, the outlet holes 24 are symmetrically disposed on both sides of the target pin 22, and the center of the target pin 22 is taken as a symmetry axis. The outlet holes 24 are symmetrically arranged at two sides of the target nail 22, namely, after the fuel oil is atomized by air for a plurality of times, the fuel oil is sprayed from the outlet holes, so that the sprayed fuel oil can be fully combusted, the use amount of the fuel oil is saved, and the combustion rate of the fuel oil is improved; at the same time, the probability of the outlet aperture 24 becoming clogged is reduced.

In one possible implementation, as shown in fig. 1 and 2, the spraygun body 1 further comprises: and the elastic device 3 is arranged between the first atomizing member 122 and the end part of the second sleeve 11. The elastic device 3 can prevent friction between the first atomization member 122 and the second sleeve 11, prevent the first atomization member 122 and the second sleeve 11 from being worn, and prolong the service life of the first atomization member 122 and the second sleeve 11. At the same time, the elastic means 3 prevents the fuel from entering the first compressed air passage 101, keeping the fuel passage 111 independent of the first compressed air passage 101, and the elastic means 3 acts as a seal.

Optionally, the elastic means 3 comprise: a gasket; the gasket can play a role in sealing and is convenient to disassemble and assemble.

In one possible implementation, as shown in fig. 1 and 2, the spray gun further comprises: a fastening device 4, the fastening device 4 is used for fastening the spray gun nozzle 2 and the first sleeve 10; the spray gun nozzle 2 can be stably sleeved outside the first sleeve 10 through the fastening device 4; meanwhile, when the fastening device 4 is fastened, the first atomizing element 122 of the atomizing structure 12 can be pressed against the second sleeve 11, so that the sealing performance between the first atomizing element 122 and the second sleeve 11 is enhanced.

Alternatively, the fastening device 4 comprises: a screw; choose for use the screw not only can fix first sleeve 10 and spray gun mouth 2, and make things convenient for the later stage dismouting to maintain and change.

In a second aspect of the present application, fig. 3 is a schematic perspective view of a burner provided by the present application, as shown in fig. 3, a fuel inlet 5; a compressed air inlet 6; and a lance as described above for injecting combusted fuel and air. Fuel oil is introduced through the fuel oil inlet 5, air is introduced through the compressed air inlet 6, the fuel oil and the air respectively enter the spray gun, multiple atomization is achieved in the spray gun, the collision times of the fuel oil and the air are increased, fuel oil atomized particles are fine, and the fuel oil can be more fully combusted; even when the fuel quantity is large, the fuel can be atomized in the spray gun, the fuel particle size is reduced, the fuel combustion efficiency is improved, and the fuel energy consumption is reduced, so that the purpose of saving fuel is achieved.

In a third aspect of the application, an asphalt plant comprises a burner as described above. The structure and the beneficial effect of the burner used by the asphalt station are provided, and the beneficial effect of the burner is already explained, so the detailed description is omitted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A spray gun, comprising: the spray gun comprises a first sleeve (10), wherein a spray gun nozzle (2) is sleeved outside the first sleeve (10);

a second sleeve (11) arranged inside the first sleeve (10), wherein a fuel passage (111) is formed inside the second sleeve (11), and a first compressed air passage (101) is formed between the second sleeve (11) and the first sleeve (10); and

an atomizing structure (12), wherein the atomizing structure (12) is positioned at the end part of the second sleeve (11), and the atomizing structure (12) is abutted to the spray gun nozzle (2);

wherein the atomizing structure (12) has a first mixing chamber (121), the first mixing chamber (121) communicating with the first compressed air passage (101), the fuel passage (111) communicating with the first mixing chamber (121).

2. The spray gun according to claim 1, characterized in that said atomizing structure (12) comprises:

a first atomizing member (122), one end of the first atomizing member (122) being disposed at an end of the second sleeve (11);

a second atomization piece (123), wherein the second atomization piece (123) is sleeved outside the other end of the first atomization piece (122), a first channel (124) is formed between the second atomization piece (123) and the first atomization piece (122), and the first channel (124) is communicated with the first mixing chamber (121); and

a first air inlet hole (1231) provided in the second atomizing member (123), the first air inlet hole (1231) being used to communicate the first compressed air passage (101) with the first passage (124).

3. The spray gun of claim 2, characterized in that said atomizing structure (12) further comprises:

a third atomization piece (125), wherein one end of the third atomization piece (125) is sleeved outside the second atomization piece (123), the other end of the third atomization piece (125) is located inside the spray gun nozzle (2) and is abutted against the inner wall of the spray gun nozzle (2), and a second channel (126) is formed between the third atomization piece (125) and the second atomization piece (123); and

a second air inlet hole (1251) opened in the third atomizing member (125), the second air inlet hole (1251) being for communicating the first compressed air passage (101) with the second passage (126).

4. The lance defined in claim 3 wherein,

the first channel (124) comprises a first tapered channel; and/or

The second channel (126) comprises a second tapered channel.

5. The spray gun of claim 3, characterized in that said first atomizing member (122) comprises:

a first atomising body portion (1221), one end of the first atomising body portion (1221) being provided at the end of the second sleeve (11); and

a first atomization limiting part (1222) arranged at the other end of the first atomization body part (1221), wherein the first atomization limiting part (1222) is connected with the outer surface of the first atomization body part (1221);

the second atomizing member (123) includes:

the second atomization body part (1232), one end of the second atomization body part (1232) is sleeved with the first atomization limiting part (1222); and

a second atomization limiting portion (1233) disposed at the other end of the second atomization body portion (1232), the second atomization limiting portion (1233) being connected to an outer surface of the second atomization body portion (1232); wherein,

the first air inlet hole (1231) is opened in the second atomizing body part (1232).

6. The spray gun of claim 5, characterized in that said third atomizing member (125) comprises:

a third atomizing body part (1252), wherein one end of the third atomizing body part (1252) is sleeved with the second atomizing limiting part (1233); the other end of the third atomizing body part (1252) is abutted against the spray gun nozzle (2); wherein,

the second air intake hole (1251) is opened in the third atomizing body portion (1252).

7. The spray gun of claim 2 further comprising:

a third sleeve (13), a second compressed air channel (131) being formed inside the third sleeve (13);

a first through hole (112) formed in one end of the second sleeve (11); wherein,

one end of the third sleeve (13) passes through the first through hole (112) to the inside of the first atomizing member (122) and extends to one end of the first mixing chamber (121) close to the first atomizing member (122) through the first atomizing member (122);

a third channel (132) is formed between the third sleeve (13) and the first atomizer (122);

one end of the third passage (132) communicates with the fuel passage (111), and the other end of the third passage (132) communicates with the first mixing chamber (121).

8. Spray gun according to claim 1, characterized in that the spray gun nozzle (2) comprises:

the spray gun nozzle (2) body is provided with a cavity;

the target nail (22) is arranged on the inner wall of the spray gun nozzle (2) body, and the target nail (22) is arranged opposite to the first mixing chamber (121); the target nail (22) is used for rebounding the fuel sprayed from the fuel channel (111).

9. A burner, comprising:

a fuel inlet (5);

a compressed air inlet (6); and

a spray gun as claimed in any one of claims 1 to 8, which is for injecting combusted fuel and air.

10. An asphalt plant, characterized in that it comprises a burner according to claim 9.

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