CN216857064U

CN216857064U - Spray head and working machine

Info

Publication number: CN216857064U
Application number: CN202220006306.8U
Authority: CN
Inventors: 曹良智; 杜斌; 刘吉安
Original assignee: Hunan Sanyi Huayuan Machinery Co
Current assignee: Hunan Sanyi Huayuan Machinery Co
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-07-01
Anticipated expiration: 2032-01-04

Abstract

The utility model relates to the technical field of spray head equipment, in particular to a spray head and an operation machine. The spray head comprises a first channel, a second channel and a third channel, wherein the third channel is a temperature-changing medium channel, the temperature-changing medium for heating or cooling can be selectively introduced into the third channel, in a cold environment, when the temperature changing medium with higher temperature is introduced into the third channel, the medium in the first channel and/or the second channel can be heated, thereby avoiding or reducing the adverse effect caused by the phenomena of emulsification or icing of oil, water or oil-water mixture and the like caused by low temperature, in a hot environment, when the temperature changing medium with lower temperature is introduced into the third channel, the medium in the first channel and/or the second channel can be cooled, the adverse effect of the spray liquid temperature being too high on the service life of plastic parts possibly contained in the spray head is avoided or reduced, and the adaptability of the spray head to the ambient temperature is improved.

Description

Spray head and working machine

Technical Field

The utility model relates to the technical field of spray head equipment, in particular to a spray head and an operating machine.

Background

The spray head is widely applied to the industrial fields of papermaking, spinning, metallurgy and the like, the working environment is stable, the purity of the medium is high, and the spray head does not need to be cleaned and maintained frequently. And therefore their durability in use and reliability of installation are mainly considered.

The spray head can also be applied to the field of working machines. In the field of operating machinery, the working environment of the spray head is severer. Taking a road roller as an example, due to construction needs, the road roller is generally provided with a spraying system, and if the tire road roller needs to perform oil spraying treatment on the surface of a tire to prevent the construction quality from being reduced due to adhesion of asphalt on the surface of the tire. However, in the north of the yellow river, plateau areas and other places with cold climate, the low temperature can cause the phenomenon of emulsification or icing of oil or water remained in the pipeline and the nozzle, so that the nozzle is blocked, and the oil-spraying and water-sprinkling system fails. In addition, in hot weather, high temperature may also have a certain effect on the life of the plastic part of the nozzle.

SUMMERY OF THE UTILITY MODEL

Embodiments according to the present invention are directed to improving at least one of the technical problems of the related art or the related art.

In view of the above, an object of an embodiment of the present invention is to provide a showerhead.

It is another object according to an embodiment of the present invention to provide a work machine.

In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a nozzle head, including a nozzle body, where the nozzle body is provided with a first channel extending axially, a second channel and a third channel are provided at the periphery of the first channel, a mixing cavity is provided at an end of the nozzle body, the mixing cavity is provided with a nozzle communicated with the mixing cavity, the first channel and the second channel are both communicated with the mixing cavity, one of the first channel and the second channel is a liquid channel, the other is a gas channel, and the third channel is a temperature-changing medium channel.

As an improvement of one aspect of the above nozzle, the third channel is an annular channel with an opening, the nozzle body is provided with a variable temperature medium inlet and a variable temperature medium outlet, one end of the third channel is connected with the variable temperature medium inlet, and the other end of the third channel is connected with the variable temperature medium outlet.

As an improvement of the above-mentioned nozzle in one aspect, the second channel is located between the first channel and the third channel, the nozzle body is provided with a first medium inlet, and the first medium inlet passes through an opening of the third channel and is connected with the second channel.

As an improvement of one aspect of the spray head described above, the spray head body includes a conical body extending into the mixing chamber, the outlet of the first passageway being located at the tip of the conical body.

As an improvement of one aspect of the nozzle, the first channel includes a large diameter section, a tapered section and a small diameter section which are connected in sequence, the small diameter section is connected with the mixing cavity, an outlet of the small diameter section is located at a tip of the tapered body, and a size of a connecting end of the tapered section and the large diameter section is larger than a size of a connecting end of the tapered section and the small diameter section.

As an improvement of the above nozzle in one aspect, the second channel includes an annular channel and a plurality of branch channels, one end of each of the plurality of branch channels is connected to the annular channel, the other end of each of the plurality of branch channels is connected to the mixing chamber, the plurality of branch channels are disposed around the first channel, and the plurality of branch channels are inclined toward the outlet of the first channel.

As a modification of one aspect of the spray head, the outer end of the mixing chamber is a conical surface on which the nozzle is located.

As a modification of the above-mentioned sprinkler in one aspect, the nozzle is in the shape of a straight line or a cross or an O.

The spray head comprises a first channel, a second channel and a third channel, wherein one of the first channel and the second channel is a liquid channel, the other one of the first channel and the second channel is a gas channel, the third channel is a temperature-changing medium channel, a temperature-changing medium for heating or cooling can be selectively introduced into the third channel, in a cold environment, when the temperature-changing medium with higher temperature is introduced into the third channel, the medium in the first channel and/or the second channel can be heated, so that adverse effects caused by phenomena of emulsification or icing of oil, water or an oil-water mixture and the like caused by low temperature can be avoided or reduced, in a hot environment, when the temperature-changing medium with lower temperature is introduced into the third channel, the medium in the first channel and/or the second channel can be cooled, so that adverse effects caused by overhigh temperature of spraying liquid on the service life of plastic parts possibly contained in the spray head can be avoided or reduced, thereby improving the adaptability of the spray head to the ambient temperature.

An embodiment according to a second aspect of the present invention provides a work machine comprising: a vehicle body; the showerhead according to any of the above first aspects is provided on a vehicle body.

In this technical scheme, through adopting the shower nozzle of any one above-mentioned technical scheme, thereby has had above-mentioned technical scheme's whole beneficial effect, and it is no longer repeated here. The arrangement of the vehicle body is convenient for bearing the spray head, and the spray head can be used for spraying in the moving process of the operation machine.

As an improvement of the above work machine in one aspect, the work machine includes an engine provided on the vehicle body, and a cooling water system of the engine is connected to the third passage.

Additional aspects and advantages of embodiments in accordance with the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the utility model.

Drawings

FIG. 1 is a schematic cross-sectional view of a showerhead according to one embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural view of a showerhead according to an embodiment of the present invention;

fig. 3 is a schematic sectional view of a partial structure of a showerhead according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

1. a spray head body; a first channel; a second channel;

4. a third channel; 5, a mixing cavity; 6, a nozzle;

7. a temperature change medium inlet; 8, a temperature changing medium outlet; a first media inlet;

10. a conical body; a large diameter section; a conical section;

23. a small diameter section; an annular channel; a bypass channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other components or elements inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 3, an embodiment of the first aspect of the present invention provides a spray head, including a spray head body 1, where the spray head body 1 is provided with a first channel 2 extending axially, a second channel 3 and a third channel 4 are provided at the periphery of the first channel 2, an end of the spray head body 1 is provided with a mixing chamber 5, the mixing chamber 5 is provided with a nozzle 6 communicating with the mixing chamber 5, the first channel 2 and the second channel 3 are both communicated with the mixing chamber 5, one of the first channel 2 and the second channel 3 is a liquid channel, the other is a gas channel, and the third channel 4 is a temperature-changing medium channel.

The temperature-changing medium can be oil, water or gas. In this embodiment, the spray head includes a first channel 2, a second channel 3, and a third channel 4, wherein one of the first channel 2 and the second channel 3 is a liquid channel, the other is a gas channel, the third channel 4 is a temperature-changing medium channel, liquid and gas enter the mixing chamber 5 through the liquid channel and the gas channel respectively and are mixed and then sprayed out from the nozzle 6, the temperature-changing medium in the third channel 4 can exchange heat with the medium in the first channel 2 and/or the second channel 3, so as to achieve a temperature adjustment function, specifically, in a cold environment, when the temperature-changing medium with a higher temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be heated, thereby avoiding or reducing adverse effects caused by phenomena such as emulsification or icing of oil, water, or oil-water mixture, and the like due to low temperature, in a hot environment, when the temperature changing medium with lower temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be cooled, thereby avoiding or reducing the adverse effect of the overhigh temperature of the sprayed liquid on the service life of the plastic parts possibly contained in the spray head.

From the above, the spray head of the present invention includes the first channel 2, the second channel 3 and the third channel 4, one of the first channel 2 and the second channel 3 is a liquid channel, the other one is a gas channel, the third channel 4 is a temperature changing medium channel, the third channel 4 can selectively introduce a temperature changing medium for heating or cooling, in a cold environment, when the temperature changing medium with a higher temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be heated, thereby avoiding or reducing adverse effects caused by phenomena such as emulsification or icing of oil, water or oil-water mixture caused by low temperature, in a hot environment, when the temperature changing medium with a lower temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be cooled, thereby avoiding or reducing adverse effects caused by an excessively high temperature of the spraying liquid on the service life of plastic members possibly included in the spray head Thereby improving the adaptability of the spray head to the ambient temperature.

In a preferred embodiment of the present invention, the third channel 4 is an annular channel with an opening, the spray head body 1 is provided with a temperature-changing medium inlet 7 and a temperature-changing medium outlet 8, one end of the third channel 4 is connected to the temperature-changing medium inlet 7, and the other end of the third channel 4 is connected to the temperature-changing medium outlet 8. So arranged, the temperature-changing medium is beneficial to form a circulating loop in the third channel 4, and the temperature-changing medium can exchange heat with the medium in the first channel 2 and/or the second channel 3 more fully. More preferably, the second channel 3 is located between the first channel 2 and the third channel 4, the spray head body 1 is provided with a first medium inlet 9, and the first medium inlet 9 penetrates through an opening of the third channel 4 and is connected with the second channel 3. The type of the medium flowing into the first medium inlet 9 is related to the second channel 3, when the second channel 3 is a liquid channel, the medium flowing into the first medium inlet 9 is a liquid such as oil or water or oil-water mixture, and when the second channel 3 is a gas channel, the medium flowing into the first medium inlet 9 is a gas. In the preferred embodiment, the third channel 4 is an annular channel with an opening, and can well avoid the first medium inlet 9, so that the first medium inlet 9 can penetrate through the opening of the third channel 4 to be connected with the second channel 3, the first medium inlet 9, the temperature-changing medium inlet 7 and the temperature-changing medium outlet 8 are staggered in position and can extend in a direction perpendicular to the first channel 2, and thus, the spray head of the present invention has a greater structural design freedom.

In the preferred version of this embodiment, the spray head body 1 comprises a conical body 10 extending into the mixing chamber 5, the outlet of the first passage 2 being located at the tip of the conical body 10. Correspondingly, the outer end of the mixing chamber 5 is conical, on which the nozzle 6 is located. The conical surface and the conical body 10 are arranged, so that the impact force on the medium is larger, the gas-liquid momentum exchange is more thorough, and the atomization effect is better.

In a preferred embodiment of the present invention, the first channel 2 includes a large diameter section 21, a tapered section 22 and a small diameter section 23 connected in sequence, the small diameter section 23 is connected to the mixing chamber 5, an outlet of the small diameter section 23 is located at a tip of the tapered body 10, and a size of an end of the tapered section 22 connected to the large diameter section 21 is larger than that of an end connected to the small diameter section 23. The conical section 22 is arranged such that the medium, such as gas or liquid, in the first channel 2 is concentrated to a higher pressure, and thus a higher impact force is generated at the moment of ejection.

In a preferred embodiment of the present invention, the second channel 3 includes an annular channel 31 and a plurality of branch channels 32, one end of each of the plurality of branch channels 32 is connected to the annular channel 31, the other end of each of the plurality of branch channels 32 is connected to the mixing chamber 5, the plurality of branch channels 32 are circumferentially disposed around the first channel 2, and the plurality of branch channels 32 are inclined toward the outlet of the first channel 2. Wherein the center lines of the annular channel 31, the first channel 2 and the nozzle 6 coincide, the number of the branch channels 32 may be two, three or more. The design scheme that a plurality of branch passageways 32 incline to the exit direction of first passageway 2 is favorable to the medium in second passageway 3 more accurately and concentrate and mix with the medium in first passageway 2, promotes atomizing efficiency and atomization effect.

Specifically, the nozzle 6 is optionally arranged in a straight line shape, so that a fan-shaped spray is formed conveniently. Of course, the nozzle 6 may also be arranged in a cross-shape, O-shape, in order to form sprays of different shapes.

In the first channel 2 and the second channel 3, the first channel 2 may be a liquid channel, and the second channel 3 may be a gas channel; the first channel 2 may be a gas channel, and the second channel 3 may be a liquid channel. When the first channel 2 is a gas channel and the second channel 3 is a liquid channel, the gas can be flushed into the liquid by using a method that high-pressure liquid surrounds the high-pressure gas, so that the liquid is filled with gas nuclei, and finally, the liquid is atomized to form small liquid droplets with the gas nuclei, and the micro-jet is formed by virtue of cavitation erosion to achieve the cleaning effect. Meanwhile, the gas has a great flushing effect and is shared with liquid, so that water resources can be saved, and the air cooling radiator is suitable for the characteristic that the air cooling radiator is mostly in a water-deficient environment. When the first channel 2 is a liquid channel and the second channel 3 is a gas channel, the gas enters the mixing cavity 5 to collide and mix with the liquid by using a method that high-pressure gas surrounds the high-pressure liquid, so as to form primary atomization; the striking of mixing chamber, mixing effect make liquid by the air current parcel, have increased the area of contact between the gas-liquid, have also increased the shearing force between the gas-liquid, make the atomizing film forming effect better, then the mist is by 6 outfields of spout of nozzle, with outfield air friction, tear, form the second time and atomize. The third channel 4 is used for carrying out temperature change adjustment on the medium in the first channel 2 and/or the second channel 3, in a cold environment, when the temperature change medium with higher temperature is introduced into the third channel 4, the medium in the first channel 2 and the second channel 3 can be heated in a heat conduction mode, so that adverse effects caused by phenomena of emulsification or icing of oil, water or an oil-water mixture caused by low temperature are avoided or reduced, and in a hot environment, when the temperature change medium with lower temperature is introduced into the third channel 4, the medium in the first channel 2 and the second channel 3 can be cooled through heat conduction.

Hereinafter, for convenience of description, the showerhead of the present invention will be further described with the first passage 2 being a liquid passage and the second passage 3 being a gas passage.

In a preferred version of this embodiment, the spray head body 1 comprises a liquid cap, a gas cap, a body and a connector. The connecting piece is detachably connected with the liquid cap, for example, the connecting piece is in threaded connection with the liquid cap, and the body is detachably connected with the liquid cap. The connecting piece is provided with a limiting part, and the limiting part is used for crimping the gas cap on the liquid cap. In this embodiment, the connecting member is detachably connected to the liquid cap, and the gas cap is pressed against the liquid cap through the stopper, so that the gas cap can be removed and the liquid cap can be exposed after the connecting member is removed. Similarly, when the gas cap is installed, the gas cap can be fixed by matching the position of the gas cap with that of the liquid cap and then connecting the connecting piece with the liquid cap. The spray head of the embodiment is simple in structure, easy to assemble and disassemble, high in assembling and disassembling speed, convenient to maintain the liquid cap and the gas cap, and capable of cleaning and maintaining the liquid cap and the gas cap independently after being taken down, and convenience in maintenance and cleaning is improved. In addition, it should be noted that the gas cap is pressed on the liquid cap by the limiting part of the connecting piece, and the pressing manner is also beneficial to improving the sealing performance between the gas cap and the liquid cap. The body can be used as a carrier for mounting the liquid cap and the gas cap, and parts such as the liquid cap and the gas cap are convenient to assemble together to be mounted on equipment as an integral spray head part, so that the convenience for mounting the whole spray head is improved.

The gas cap is generally conical and has a skirt so that the stopper compresses the skirt against the liquid cap. The tip of the conical gas cap is convenient to extend out of the connecting piece for spraying. The tapered gas cap may also form an atomization space with the liquid cap. The gas cap is provided with a reflection part which is used for reflecting the gas exhausted from the second channel 3 to the outlet end of the first channel 2. The gas exhausted from the second channel 3 is reflected to the outlet end of the first channel 2 by the reflection part, so that the liquid can be conveniently and fully atomized by the gas. When the second channel 3 comprises a plurality of branch channels 32, the gas sprayed from different branch channels 32 is sprayed to the first channel 2 in the middle, so that the gas can collide with each other, and the atomization effect is further improved. The plurality of branch passages 32 are inclined toward the outlet of the first passage 2, so that the gas is jetted toward the outlet end of the first passage 2. Such direction of spouting is favorable to gas after the reflection, more accurate and concentrate and mix with liquid to atomizing liquid promotes atomization efficiency and atomization effect.

Specifically, optionally, the connecting piece and the liquid cap are provided with a clamping groove. The liquid cap is provided with a clamping piece. The connecting piece and the liquid cap are connected through the matching of the clamping groove and the clamping piece. The connecting piece and the liquid cap are connected through the matching of the clamping groove and the clamping piece, so that the structure is simple, the operation is easy, the assembly and disassembly are convenient, and the situation that the connecting piece and the liquid cap are difficult to disassemble due to the fact that the connecting piece and the liquid cap are clamped by impurities is not easy to occur. In addition, the clamping groove is matched with the clamping piece instead of a threaded connection mode, when the connecting piece is assembled and disassembled, the assembly and disassembly can be realized by a small rotating angle, and the assembly and disassembly efficiency is higher compared with the threaded connection.

Furthermore, the clamping groove is formed in the inner circumferential surface of the connecting piece along the circumferential direction. The connecting piece is also provided with a slot for inserting the clamping piece. The slot is connected with the clamping groove. The clamping piece is arranged on the peripheral surface of the liquid cap.

In this embodiment, the connecting member is provided with a slot, the slot is connected with the slot, and the clamping member can enter the circumferentially arranged slot by rotating after being inserted into the slot. After the joint spare gets into in the draw-in groove of circumference setting, can cooperate with the draw-in groove, carry out axial spacing to liquid cap and connecting piece, avoid liquid cap and connecting piece to appear separating in the axial.

Further, the clamping groove extends along the circumferential direction of the connecting piece. The clamping groove is also inclined towards one axial side of the connecting piece. That is to say, the locking groove is not parallel to the circumferential plane of the connecting piece, but is arranged obliquely, or substantially helically. The mode that the slope set up like this for behind the joint spare entering draw-in groove, when continuing to rotate along the draw-in groove, can press more tightly between connecting piece and the liquid cap more, thereby promote the stability and the reliability of connecting between these two, can also promote the reliability of the sealing between liquid cap and the gaseous cap simultaneously, and promote the fixed stability of gaseous cap.

The length of the clamping groove extending along the circumferential direction of the connecting piece is approximately 1/15-1/10 of the circumference of the connecting piece. Or the radian of the arc between the two ends of the clamping groove is approximately 20-40 degrees. Therefore, when the connecting piece is assembled and disassembled, the connecting piece does not need to rotate for multiple circles like threaded connection, and the assembling and disassembling efficiency is high.

In other preferable solutions of this embodiment, the liquid cap is provided with a locking groove, and the connecting member is provided with a locking member.

In the preferred scheme of this embodiment, the third channel 4, the annular channel 31 of the second channel 3, the first medium inlet 9, the temperature-changing medium inlet 7, and the temperature-changing medium outlet 8 are all disposed on the body, the plurality of branch channels 32 of the second channel 3 are disposed on the liquid cap, a through hole is disposed on the body, a plug and a conical body 10 are disposed on the liquid cap, the plug on the liquid cap extends into the through hole and is in threaded connection with the body at the through hole, an annular groove and an annular groove with an opening are disposed on the body, when the liquid cap is connected with the body, the annular groove and the annular groove with an opening are matched to form the annular channel 31 and the third channel 4 of the second channel 3, respectively, and the first channel 2 is disposed to penetrate through the liquid cap.

In a preferred embodiment of this embodiment, the first medium inlet 9, the temperature change medium inlet 7, the temperature change medium outlet 8, and the first channel 2 are all internally threaded, so as to facilitate connection with an external pipeline.

In a preferred aspect of this embodiment, the spray head further includes a first sealing member and a second sealing member. The first seal is disposed between the liquid cap and the gas cap. A second seal is disposed between the body and the liquid cap. Set up first sealing member between liquid cap and gas cap, be favorable to promoting the leakproofness between liquid cap and the gas cap, still be favorable to guaranteeing pressure to ensure gas-liquid mixture's jet velocity, still be favorable to providing the protection simultaneously, avoid because the phenomenon that the impurity among the external adverse circumstances invades and takes place to block up. The arrangement of the second sealing element has similar technical effects, and is not described in detail herein. It should be noted that the first sealing element and the second sealing element may be in the form of a sealing gasket or an O-ring. Further, the structural components of the liquid cap, the gas cap, the first seal member, and the second seal member of the present invention may be provided by referring to the utility model patent application No. 202022501352.9 entitled "two-phase spray head and work vehicle".

In summary, the spray head of the present invention includes a first channel 2, a second channel 3 and a third channel 4, one of the first channel 2 and the second channel 3 is a liquid channel, the other one is a gas channel, the third channel 4 is a temperature-changing medium channel, the third channel 4 can selectively introduce a temperature-changing medium for heating or cooling, in a cold environment, when the temperature-changing medium with a higher temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be heated, thereby avoiding or reducing adverse effects caused by phenomena such as emulsification or icing of oil, water or oil-water mixture caused by low temperature, in a hot environment, when the temperature-changing medium with a lower temperature is introduced into the third channel 4, the medium in the first channel 2 and/or the second channel 3 can be cooled, thereby avoiding or reducing adverse effects caused by an excessively high temperature of the sprayed liquid on the service life of plastic parts possibly included in the spray head, thereby improving the adaptability of the spray head to the ambient temperature.

An embodiment according to a second aspect of the present invention provides a work machine comprising: a vehicle body and a spray head as in the embodiment of the first aspect described above, the spray head being provided on the vehicle body. The work machine may be a road roller, a milling machine, a grader, or a paver.

In this embodiment, by using the spray head of any one of the embodiments, all the beneficial effects of the embodiments are achieved, and are not described herein again. The arrangement of the vehicle body is convenient for bearing the spray head, and the spray head can be used for spraying in the moving process of the operation machine.

In a preferable scheme of this embodiment, the working machine includes an engine, the engine is disposed on the vehicle body, a cooling water system of the engine is connected to the third passage 4 of the nozzle, so that cooling water of the engine is used as a temperature-changing medium, and after the cooling water of the engine cools the engine, the cooling water of the engine absorbs heat of the engine and has a certain temperature, so that the cooling water of the engine with a higher temperature can be used to heat the medium in the first passage 2 and/or the second passage 3.

Specifically, optionally, a cooling water system of the engine is respectively connected to the variable temperature medium inlet 7 and the variable temperature medium outlet 8, one end of the third channel 4 is connected to the variable temperature medium inlet 7, the other end of the third channel 4 is connected to the variable temperature medium outlet 8, cooling water of the engine flows into the third channel 4 through the variable temperature medium inlet 7 to heat the medium in the first channel 2 and/or the second channel 3, the temperature of the cooling water of the engine is reduced after heat exchange, and then the cooling water flows into the engine through the variable temperature medium outlet 8 to cool the engine. In this way, the coolant of the engine can be recycled to heat the medium in the first passage 2 and/or the second passage 3.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention may be understood as specific cases by those of ordinary skill in the art.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The spray head is characterized by comprising a spray head body (1), wherein a first channel (2) extending axially is arranged on the spray head body (1), a second channel (3) and a third channel (4) are arranged on the periphery of the first channel (2), a mixing cavity (5) is arranged at the end part of the spray head body (1), a nozzle (6) communicated with the mixing cavity (5) is arranged on the mixing cavity (5), the first channel (2) and the second channel (3) are both communicated with the mixing cavity (5), one of the first channel (2) and the second channel (3) is a liquid channel, the other one is a gas channel, and the third channel (4) is a temperature-changing medium channel.

2. The spray head according to claim 1, wherein the third channel (4) is an annular channel with an opening, the spray head body (1) is provided with a temperature-changing medium inlet (7) and a temperature-changing medium outlet (8), one end of the third channel (4) is connected with the temperature-changing medium inlet (7), and the other end of the third channel (4) is connected with the temperature-changing medium outlet (8).

3. Spray head according to claim 2, characterized in that the second channel (3) is located between the first channel (2) and the third channel (4), the spray head body (1) is provided with a first medium inlet (9), and the first medium inlet (9) is connected with the second channel (3) through the opening of the third channel (4).

4. Sprayhead according to claim 1, characterized in that the sprayhead body (1) comprises a conical body (10) that penetrates into the mixing chamber (5), the outlet of the first channel (2) being located at the tip of the conical body (10).

5. Spray head according to claim 4, characterized in that said first channel (2) comprises a large diameter section (21), a conical section (22) and a small diameter section (23) connected in sequence, said small diameter section (23) being connected to said mixing chamber (5), the outlet of said small diameter section (23) being located at the tip of said conical body (10), the size of the end of said conical section (22) connected to said large diameter section (21) being greater than the size of the end connected to said small diameter section (23).

6. Spray head according to any of claims 1 to 5, characterized in that the second channel (3) comprises an annular channel (31) and a plurality of branch channels (32), one end of the plurality of branch channels (32) being connected to the annular channel (31) and the other end of the plurality of branch channels (32) being connected to the mixing chamber (5), the plurality of branch channels (32) being arranged around the first channel (2) and the plurality of branch channels (32) being inclined in the direction of the outlet of the first channel (2).

7. A sprayhead according to any one of claims 1-5, wherein the outer end of the mixing chamber (5) presents a conical surface on which the nozzle (6) is located.

8. Spray head according to any of claims 1 to 5, characterized in that the spray nozzles (6) are in-line or cross-shaped or O-shaped.

9. A work machine, comprising:

a vehicle body;

the spray head of any one of claims 1 to 8, provided on the vehicle body.

10. A working machine according to claim 9, characterized by comprising an engine, which is arranged on the vehicle body, the cooling water system of which is connected to the third channel (4).