CN220143734U - Spray gun head and spray gun - Google Patents

Abstract

The utility model relates to the technical field of enamel and discloses a spray gun head and a spray gun. Through set up two at least discharge openings on the rifle head body, and adjacent discharge opening is the contained angle setting for rifle head body can be in two at least directions by the discharge opening blowout coating that corresponds. The spray gun head of the spray gun can discharge and spray in at least two directions so as to spray and coat the top, the middle and the bottom of the water heater liner at the same time, thereby meeting the liner spraying requirement. Meanwhile, as only one spray gun head is arranged, the overall transverse dimension of the spray gun can be greatly reduced, and the spray gun is convenient to extend into and extend out of the small-caliber inner container, so that the enamel spraying requirement of the small-caliber water heater inner container is met.

Description

Spray gun head and spray gun

Technical Field

The utility model relates to the technical field of enamel, in particular to a spray gun head and a spray gun.

Background

The inner container of water heater is a kind of container used for holding water, in order to prevent the inner container from being corroded by water after long-term use and leaking, the common practice is that enamel treatment is carried out on the inner wall of the inner container, namely, a layer of enamel layer is coated on the inner wall of the inner container, and the enamel layer can isolate the inner wall of the inner container from water, so that good anti-corrosion effect is achieved.

In the prior art, a plurality of gun heads are installed on a gun spraying rod to simultaneously spray enamel on the top, the middle and the bottom of the inner container. However, due to the fact that the plurality of gun heads exist, the whole size of the spray gun is large, the diameter of the liner opening of the European-style water heater liner is smaller than 50mm, the plurality of gun heads cannot extend into the liner from the liner opening to spray enamel, and enamel spraying operation of the small-caliber water heater liner is difficult.

Accordingly, there is a need for a spray gun head and spray gun that solves the above-mentioned problems.

Disclosure of Invention

Based on the problems, the utility model aims to provide a spray gun head and a spray gun, which can realize the miniaturization design of the spray gun head and meet the enamel spraying requirement of the inner wall of a small-caliber water heater liner.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in one aspect, a spray gun head is provided, which comprises a gun head body, two adjacent discharge holes of being provided with feed channel and two at least discharge holes on the gun head body are the contained angle setting, every the discharge hole all with feed channel intercommunication, every the periphery of discharge hole all is provided with at least one venthole.

As the preferable scheme of the spray gun head, the plurality of discharge holes comprise a first discharge hole, a second discharge hole and a third discharge hole, and the first discharge hole, the second discharge hole and the third discharge hole are all arranged at an included angle with the feed channel.

As the preferable scheme of the spray gun head, the first discharge hole, the second discharge hole and the third discharge hole are sequentially distributed along the extending direction of the feeding channel, the included angle between the first discharge hole and the feeding channel is alpha, the included angle between the second discharge hole and the feeding channel is beta, the included angle between the third discharge hole and the feeding channel is gamma, and alpha is less than beta and less than gamma.

As the preferable scheme of the spray gun head, an avoidance inclined plane is arranged on one side of the gun head body at the outlet of the third discharge hole, and the inclination direction of the avoidance inclined plane is the same as the extension direction of the third discharge hole.

As the preferable scheme of the spray gun head, the spray gun head body is provided with the air inlet channel, and the air outlet hole is communicated with the air inlet channel.

As the preferable scheme of the spray gun head, each air outlet hole is arranged at an included angle with the air inlet channel, and the air outlet holes are obliquely arranged towards the corresponding discharging holes.

As the preferable scheme of the spray gun head, the air outlet hole comprises a first hole section and a second hole section which are connected and are arranged in an included angle, the first hole section is connected with the air inlet channel, and the second hole section is obliquely arranged towards the corresponding discharging hole.

As a preferable scheme of the spray gun head of the spray gun, the joint of the first hole section and the second hole section is in smooth transition.

As a preferable mode of the spray gun head of the utility model, the extending direction of the air inlet channel is the same as the extending direction of the feeding channel, and the air inlet channel and the feeding channel are mutually independent.

As the preferable scheme of the spray gun head, at least two opposite sides of the feeding channel are provided with the air inlet channel, and at least two opposite sides of each discharging hole are provided with the air outlet holes.

As a preferable mode of the spray gun head of the utility model, a pipe joint is arranged on the gun head body, and the pipe joint is configured to be connected with a spray gun pipe of a spray gun.

As a preferable scheme of the spray gun head, the spray gun tube comprises an inner tube and an outer tube sleeved outside the inner tube at intervals, an air channel is defined between the outer tube and the inner tube, the inner tube can be communicated with the feeding channel, and the air channel can be communicated with the air inlet channel.

As the preferable scheme of the spray gun head, the spray gun head body is provided with the first guide bulge and the second guide bulge, and the discharging hole and the air outlet hole are positioned between the first guide bulge and the second guide bulge.

As a preferable scheme of the spray gun head, an avoidance plane is arranged on one side of the gun head body, which faces away from the first guide bulge and the second guide bulge.

In another aspect, there is provided a spray gun comprising a gun barrel and a gun head as described above, one end of the gun barrel being connected to the gun head and the other end being connected to a source of spray and a source of gas.

The beneficial effects of the utility model are as follows:

according to the spray gun head and the spray gun provided by the utility model, the feeding channel is used for introducing the spray paint (such as enamel glaze), the air outlet hole is used for outputting compressed air, and compressed air is output at the air outlet hole when the spray paint is sprayed out from the discharge hole, so that the spray paint is atomized, and then the spray paint is uniformly sprayed on the inner wall of the inner container of the water heater. Through set up two at least discharge openings on the rifle head body, and adjacent discharge opening is the contained angle setting for rifle head body can be in two at least directions by the discharge opening blowout coating that corresponds. The spray gun head of the spray gun can discharge and spray in at least two directions so as to spray and coat the top, the middle and the bottom of the water heater liner at the same time, thereby meeting the liner spraying requirement. Meanwhile, as only one spray gun head is arranged, the overall transverse dimension of the spray gun can be greatly reduced, and the spray gun is convenient to extend into and extend out of the small-caliber inner container, so that the enamel spraying requirement of the small-caliber water heater inner container is met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a first construction of a spray gun head according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a second configuration of a spray gun head according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a third configuration of a spray gun head according to an embodiment of the present utility model;

FIG. 4 is a first cross-sectional view of a spray gun tip provided in accordance with an embodiment of the present utility model;

FIG. 5 is a dimensional and angular label of a spray gun tip according to an embodiment of the present utility model;

FIG. 6 is a second cross-sectional view of a spray gun tip provided in accordance with an embodiment of the present utility model;

FIG. 7 is a third cross-sectional view of a spray gun tip provided in accordance with an embodiment of the present utility model;

fig. 8 is a schematic cross-sectional view of a spray gun head provided by the utility model in another embodiment.

In the figure:

1-a gun head body; 2-pipe joints;

11-a feed channel; 12-an intake passage; 14-an air outlet hole; 15-avoiding inclined planes; 16-a first guide projection;

17-a second guide projection; 18-avoiding plane;

131-a first discharge hole; 132-a second discharge hole; 133-a third discharge hole;

141-a first bore section; 142-a second bore section;

21-threaded hole.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying 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 thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 7, the present embodiment provides a spray gun head, which can be used for performing a lining spraying operation on a small-caliber water heater liner. The spray gun head comprises a gun head body 1, wherein a feeding channel 11 and at least two discharging holes are arranged on the gun head body 1, every two adjacent discharging holes are arranged at an included angle, each discharging hole is communicated with the feeding channel 11 (shown in fig. 4), and at least one air outlet hole 14 is arranged at the periphery of each discharging hole.

The feeding channel 11 is used for being introduced into the air outlet hole 14 of the spray coating (such as enamel glaze) for outputting compressed air, and the compressed air is output from the air outlet hole 14 when the spray coating is sprayed out from the discharge hole, so that the spray coating is atomized, and then the spray coating is uniformly sprayed on the inner wall of the inner container of the water heater. Through set up two at least discharge openings on rifle head body 1, and adjacent discharge opening is the contained angle setting for rifle head body 1 can be in two at least directions by the coating of corresponding discharge opening blowout. The spray gun head of the spray gun can discharge and spray in at least two directions so as to spray and coat the top, the middle and the bottom of the water heater liner at the same time, thereby meeting the liner spraying requirement. Meanwhile, as only one spray gun head is arranged, the overall transverse dimension of the spray gun can be greatly reduced, and the spray gun is convenient to extend into and extend out of the small-caliber inner container, so that the enamel spraying requirement of the small-caliber water heater inner container is met.

As shown in FIG. 5, since the plurality of discharging holes and the plurality of air outlet holes 14 are integrated on one spray gun head, the maximum transverse dimension D of the spray gun head can be reduced to be within 30mm, thereby meeting the enamel spraying requirement of the small-caliber liner of the European water heater.

Optionally, referring to fig. 1, 2 and 4, the plurality of discharge holes includes a first discharge hole 131, a second discharge hole 132 and a third discharge hole 133, and the first discharge hole 131, the second discharge hole 132 and the third discharge hole 133 are all disposed at an included angle with the feed channel 11. In this embodiment, the feeding channel 11 extends along the axial direction of the nozzle head of the spray gun, and the first discharging hole 131, the second discharging hole 132 and the third discharging hole 133 form different included angles with the feeding channel 11 respectively, so that the nozzle head of the spray gun can discharge and spray in three different directions to fully cover the inner wall of the liner of the water heater. The included angles between the first discharging hole 131, the second discharging hole 132 and the third discharging hole 133 and the included angles between the three and the feeding channel 11 can be designed according to actual spraying requirements.

Optionally, as shown in fig. 4 and fig. 5, the first discharge hole 131, the second discharge hole 132, and the third discharge hole 133 are sequentially arranged along the extending direction of the feed channel 11, where an included angle between the first discharge hole 131 and the feed channel 11 is defined as α, an included angle between the second discharge hole 132 and the feed channel 11 is defined as β, an included angle between the third discharge hole 133 and the feed channel 11 is defined as γ, and α < β < γ. The above-mentioned angle design can make the export of first discharge port 131 towards the top of inner bag inner wall, and the export of second discharge port 132 is towards the middle part of inner bag inner wall, and the export of third discharge port 133 is towards the bottom of inner bag inner wall, at the relative inner bag circumference rotatory in-process of spray gun rifle head, and the inner wall of inner bag can be covered entirely in the scope of three discharge port spraying. Illustratively, α is 25 °, β is 90 °, and γ is 155 °. In other embodiments, the specific values of α, β, and γ may be adaptively adjusted.

Optionally, referring to fig. 1 and 4, an avoidance slope 15 is disposed on the gun head body 1 at a side of the outlet of the third discharging hole 133, and the inclination direction of the avoidance slope 15 is the same as the extension direction of the third discharging hole 133. The setting of dodging the inclined plane 15 can prevent gun head body 1 from blocking the coating sprayed out by third discharge hole 133, guarantee the spraying effect. In this embodiment, the inclination angle of the avoidance slope 15 is equal to the inclination angle of the third discharge hole 133, and in other embodiments, the inclination angle of the avoidance slope 15 may also be greater than the inclination angle of the third discharge hole 133, so long as the avoidance slope is ensured to avoid the third discharge hole 133, and the blocking discharge is prevented.

Further, referring to fig. 1 and 2, the outlet position of each discharge hole is provided with a raised protective nozzle, the protective nozzle can protect the outlet edge of the discharge hole, prevent the abrasion of the outlet edge, and prolong the service life of the gun head.

Of course, in a new embodiment, two discharge holes can be provided, and the spraying ranges of the two discharge holes jointly cover the top, the middle and the bottom of the inner wall of the water heater liner. Or the number of the discharging holes is four, five and the like, so long as the spraying requirement of the water heater liner can be met.

Alternatively, referring to fig. 2 and 6, the gun head body 1 is provided with an air inlet channel 12, and the air outlet hole 14 is communicated with the air inlet channel 12. The air inlet channel 12 is used for introducing compressed air, and the compressed air is further output by the air outlet 14 so as to atomize the spray paint sprayed out of the discharge hole.

In the present embodiment, the extending direction of the air intake passage 12 is the same as the extending direction of the feed passage 11, and the air intake passage 12 and the feed passage 11 are independent from each other. By the arrangement, the spray paint can be simultaneously introduced into the feeding channel 11 and the compressed air can be introduced into the air inlet channel 12 in the same direction, namely, the gun head and the gun barrel can be positioned on the same axis, the whole size of the spray gun can be reduced, and the requirement of the small-caliber water heater liner for spraying enamel can be met. In addition, the air inlet channel 12 and the feeding channel 11 are mutually independent, so that the spraying paint and the compressed air are not interfered with each other in the conveying process, and the compressed air is only contacted with the spraying paint sprayed out of the discharging hole when the air outlet hole 14 is output, so that the atomization effect of the spraying paint can be ensured, and the spraying quality of the inner container of the water heater is improved.

Alternatively, referring to fig. 6 and 7, each of the air outlet holes 14 is disposed at an angle with respect to the air inlet channel 12, and the air outlet holes 14 are disposed obliquely toward the corresponding discharge hole. In this embodiment, the included angle between the air outlet hole 14 and the air inlet channel 12 is equal to the included angle between the corresponding discharge hole and the feed channel 11, so that the air outlet hole 14 can correspond to the discharge holes one by one, and the atomization effect is ensured. Because the air outlet holes 14 are obliquely arranged towards the corresponding discharging holes, compressed air output by the air outlet holes 14 can blow against the spray paint, so that the spray paint is effectively atomized, and the spray uniformity and the spray efficiency are improved.

In another alternative embodiment, referring to fig. 8, the gas outlet 14 includes a first hole segment 141 and a second hole segment 142 connected and disposed at an angle, the first hole segment 141 being connected to the gas inlet channel 12, the second hole segment 142 being disposed obliquely toward the corresponding discharge hole. Illustratively, the first hole section 141 is perpendicular to the air inlet channel 12, and the end of the second hole section 142 away from the first hole section 141 is inclined toward the corresponding discharge hole, and when the compressed air reaches the air outlet hole 14 via the air inlet channel 12, the inclined second hole section 142 can change the flow direction of the air flow, so that the compressed air is output toward the discharge hole, thereby ensuring the atomization effect of the spray paint.

Further, the junction of the first hole section 141 and the second hole section 142 is smoothly transitioned. That is, the inner wall of the air outlet hole 14 is integrally smooth, and no obvious angle folding position exists, so that the resistance of the compressed air in flowing is reduced, the air outlet of the air outlet hole 14 is ensured to be smooth, and the atomization effect of the spray coating is improved.

Alternatively, referring to fig. 2 and 7, at least opposite sides of the feed channel 11 are provided with air inlet channels 12, and at least opposite sides of each discharge hole are provided with air outlet holes 14. In this embodiment, two air inlet channels 12 are disposed on opposite sides of the feeding channel 11, and three air outlet holes 14 are respectively connected to the two air inlet channels 12, so that one air outlet hole 14 is respectively disposed on opposite sides of each discharge hole. The two ventholes 14 all set up towards the ejection of compact hole slope that corresponds, and when the ejection of compact hole spouted the material, two ventholes 14 jet-propelled to the ejection of compact hole that corresponds simultaneously, have further improved the spraying material atomization effect, can guarantee the spraying quality of water heater inner bag.

In other embodiments, a plurality of air outlet holes 14 may be circumferentially and alternately arranged in each discharge hole, for example, three or four air outlet holes 14 may be equally and alternately arranged, so long as the atomization effect of the spray paint can be ensured.

Alternatively, referring to fig. 1 and 2, the gun head body 1 is convexly provided with a first guide protrusion 16 and a second guide protrusion 17, and the discharge hole and the air outlet hole 14 are both positioned between the first guide protrusion 16 and the second guide protrusion 17. Referring to the orientation in fig. 1, the outlets of the left air outlet holes 14 are all close to the first guiding protrusions 16, the right air outlet holes 14 are all close to the second guiding protrusions 17, and when the air outlet holes 14 output compressed air, the first guiding protrusions 16 and the second guiding protrusions 17 can both play a guiding role in the air outlet direction of the air outlet holes 14, so that air flows are sprayed out towards the discharging holes, and the atomization effect of the spray paint is further improved.

Further, referring to fig. 3 and 4, an avoidance plane 18 is disposed on the gun head body 1 at a side opposite to the first guide protrusion 16 and the second guide protrusion 17, and the lateral dimension of one end of the gun head body 1 can be reduced due to the arrangement of the avoidance plane 18, which is more beneficial for the gun head of the spray gun to smoothly extend into and extend out of the liner of the water heater.

Alternatively, referring to fig. 1 and 4, the end of the gun head body 1 remote from the discharge and gas outlet holes 14 is a tube fitting 2, the tube fitting 2 being configured to be connected to a gun tube of a spray gun. Further, a threaded hole 21 is formed in the pipe joint 2, and a spray gun pipe of the spray gun is in threaded connection with the pipe joint 2 through the threaded hole 21, so that the spray gun head and the spray gun pipe can be quickly installed and detached.

In this embodiment, optionally, the spray gun tube includes an inner tube and an outer tube sleeved outside the inner tube at a distance, an air channel is defined between the outer tube and the inner tube, the inner tube can be communicated with the feed channel 11, the air channel can be communicated with the air inlet channel 12, the spraying slurry is conveyed to the feed channel 11 via the inner tube, and the compressed air is conveyed to the air inlet channel 12 via the air channel between the outer tube and the inner tube.

As shown in fig. 2 and 4, the threaded hole 21 is connected with the feed channel 11 through a small segment of light hole, the diameter of the light hole is larger than that of the feed channel 11 and smaller than that of the threaded hole 21, a first step surface is formed between the light hole and the threaded hole 21, a second step surface is formed between the light hole and the feed channel 11, and the air inlet channel 12 is arranged on the first step surface. So arranged, the feed passage 11 and the intake passage 12 can be completely partitioned. When the gun tube is connected with the pipe joint 2, the inner tube of the gun tube stretches into the unthreaded hole and is in sealing butt joint with the feeding channel 11, and the air channel between the outer tube and the inner tube is in sealing butt joint with the air inlet channel 12, so that the spraying material and the compressed air are guaranteed not to be mutually interfered.

Illustratively, a sealing member (e.g., a sealing ring) may be disposed in the light bore or at the end of the inner tube extending into the tube fitting 2, so that the inner tube of the gun barrel sealingly interfaces with the light bore, ensuring that the feed channel 11 and the intake channel 12 are not in communication with each other.

Further, referring to fig. 3, the avoidance plane 18 is connected with the pipe joint 2 through a transition inclined plane, and the transition inclined plane and the avoidance inclined plane 15 are symmetrically distributed on two sides of the gun head of the spray gun, so that the whole gun head of the spray gun can meet the design requirement of miniaturization size, and meanwhile, the attractive appearance can be ensured.

The embodiment also provides a spray gun, which comprises a spray gun barrel and the spray gun head, wherein one end of the spray gun barrel is connected with the spray gun head, and the other end of the spray gun barrel is connected with a spray source and a gas source. When the spray gun is used, the spray gun head is connected with a spray source and a gas source through the spray gun barrel, the spray coating and compressed air are sprayed out through the discharge hole and the gas outlet hole 14 respectively by controlling the output pressure of the spray source and the gas source, and the spray coating is atomized under the action of the compressed air at the discharge hole, so that the enamel spraying operation on the inner wall of the water heater liner is realized.

The spray gun adopting the spray gun head is characterized in that a plurality of discharge holes and a plurality of air outlet holes 14 are integrated on the gun head body 1, and the adjacent discharge holes are arranged at an included angle, so that the spray gun head can discharge and spray in a plurality of directions, and the top, the middle and the bottom of the water heater liner are coated and covered simultaneously, thereby meeting the liner enamel spraying requirement. Meanwhile, as only one spray gun head is arranged, the overall transverse dimension of the spray gun can be greatly reduced, and the spray gun is convenient to extend into and extend out of the small-caliber inner container, so that the enamel spraying requirement of the small-caliber water heater inner container is met.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (15)

1. The spray gun head is characterized by comprising a gun head body (1), wherein a feeding channel (11) and at least two discharging holes are formed in the gun head body (1), two adjacent discharging holes are arranged at an included angle, each discharging hole is communicated with the feeding channel (11), and at least one air outlet hole (14) is formed in the periphery of each discharging hole.

2. The spray gun head according to claim 1, characterized in that at least two of the discharge holes comprise a first discharge hole (131), a second discharge hole (132) and a third discharge hole (133), the first discharge hole (131), the second discharge hole (132) and the third discharge hole (133) being arranged at an angle to the feed channel (11).

3. The spray gun head according to claim 2, characterized in that the first discharge hole (131), the second discharge hole (132) and the third discharge hole (133) are sequentially arranged along the extending direction of the feeding channel (11), the included angle between the first discharge hole (131) and the feeding channel (11) is alpha, the included angle between the second discharge hole (132) and the feeding channel (11) is beta, and the included angle between the third discharge hole (133) and the feeding channel (11) is gamma, alpha < beta < gamma.

4. A spray gun head according to claim 3, characterized in that an avoidance slope (15) is arranged on one side of the gun head body (1) at the outlet of the third discharging hole (133), and the inclination direction of the avoidance slope (15) is the same as the extension direction of the third discharging hole (133).

5. The spray gun head according to claim 1, wherein an air inlet channel (12) is arranged on the gun head body (1), and the air outlet hole (14) is communicated with the air inlet channel (12).

6. The spray gun head according to claim 5, characterized in that each air outlet hole (14) is arranged at an angle to the air inlet channel (12), and the air outlet holes (14) are arranged obliquely towards the corresponding discharge holes.

7. The spray gun head according to claim 5, characterized in that the air outlet hole (14) comprises a first hole section (141) and a second hole section (142) which are connected and arranged in an included angle, the first hole section (141) is connected with the air inlet channel (12), and the second hole section (142) is obliquely arranged towards the corresponding discharge hole.

8. The spray gun tip according to claim 7, characterized in that the junction of the first bore section (141) and the second bore section (142) is rounded.

9. The spray gun head according to any one of claims 5-8, characterized in that the direction of extension of the air inlet channel (12) is the same as the direction of extension of the feed channel (11), and that the air inlet channel (12) and the feed channel (11) are independent of each other.

10. A spray gun head according to any one of claims 5-8, characterized in that at least opposite sides of the feed channel (11) are provided with the air inlet channel (12) and at least opposite sides of each discharge hole are provided with the air outlet holes (14).

11. A spray gun head according to any one of claims 5-8, characterized in that a pipe joint (2) is provided on the gun head body (1), the pipe joint (2) being configured to be connected with a gun tube of a spray gun.

12. The spray gun head according to claim 11, characterized in that the spray gun tube comprises an inner tube and an outer tube which is arranged outside the inner tube in a spacer manner, an air channel being defined between the outer tube and the inner tube, the inner tube being communicable with the feed channel (11), the air channel being communicable with the air inlet channel (12).

13. The spray gun head according to any one of claims 1-8, characterized in that a first guide protrusion (16) and a second guide protrusion (17) are arranged on the gun head body (1), and the discharge hole and the air outlet hole (14) are both positioned between the first guide protrusion (16) and the second guide protrusion (17).

14. The spray gun head according to claim 13, characterized in that the gun head body (1) is provided with a avoidance plane (18) on the side facing away from the first guide projection (16) and the second guide projection (17).

15. A lance comprising a lance tube and a lance tip according to any one of claims 1 to 14, one end of the lance tube being connected to the lance tip and the other end being connected to a source of lance and a source of gas.