A double flow channel structure and a spray gun

Abstract

The application discloses a double-flow channel structure, which comprises an air inlet channel of a gun body, an air outlet arranged at the front end of the gun body, the air outlet comprising a first outlet (1) and a second outlet (2), the first outlet (1) and the second outlet (2) being isolated from each other, the air inlet channel being divided into a first air inlet channel (6) and a second air inlet channel (7) which are isolated from each other along the axial direction of the air inlet channel, the first air inlet channel (6) and the second air inlet channel (7) being in communication with an air inlet (32) of the air inlet channel respectively, the first air inlet channel (6) being in communication with the first outlet (1) to form a first flow channel, the second air inlet channel (7) being in communication with the second outlet (2) to form a second flow channel, and the first flow channel being provided with a valve, and the application has the advantages that the mutual influence between the two air flows is reduced, the adjustment of the air injection amount does not need to depend on the air amount of the other channel, the valve is flexible to set, and the gas flow channel design is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spray guns, in particular to a double-flow structure and a spray gun. BACKGROUND

[0002] There is a spray gun, the nozzle of which comprises a first gas spout, a second gas spout and a liquid spout, the liquid spout is located in the middle, the first gas spout is located in the circumferential direction of the second gas spout, and the second gas spout is located in the circumferential direction of the liquid spout. By spraying liquid through the liquid spout and spraying gas through the first gas spout and the second gas spout at the same time, a spray and a spray shape can be formed, which is the working principle of this type of spray gun.

[0003] In order to obtain two gas spouts and control the gas flow of one of them, the prior art divides one of the two gas spouts to obtain the gas flow of the first gas spout, such as the technical solution disclosed in the Chinese patent for invention with the authorization announcement number CN208098421U: a gun body (1), a nozzle (3) and a flow cap (4) arranged on the front end of the gun body (1), the flow cap (4) is provided with a first gas flow hole (41) (i.e. the first gas spout); characterized in that: the middle part of the flow cap is provided with a through hole, the nozzle (3) is accommodated in the through hole and has a gap between the nozzle (3) and the side wall of the through hole, the gap forms a second gas flow hole (42) (i.e. the second gas spout); the side wall of the gun body (1) is provided with an annular groove with an opening facing the flow cap (4), the annular groove forms a first gas flow channel (11); the gun body (1) has a cavity (13), the cavity (13) is provided with a core body (5), the core body (5) is provided with a liquid channel (51) communicating with the nozzle (3); the gap between the core body (5) and the cavity (13) forms a second gas flow channel (12), the second gas flow channel (12) communicates with the second gas flow hole (42); the first gas flow channel (11), the second gas flow channel (12) and the liquid channel are isolated from each other; the gun body (1) is further provided with a valve (6) for communicating the first gas flow channel (11) and the second gas flow channel (12). As can be known from reading the entire patent, the gas flow of the first gas flow channel (11) is divided from the second gas flow channel (12) through the valve (6), this structure solves the problems of gas source and gas flow adjustment of the first gas flow channel (11), but the two gas flows will have a certain influence on each other, and the flow division position is also close to the side of the spout, the influence is more obvious, in addition, the adjustment of the gas flow also depends on the air flow of the second gas flow channel (12), the setting of the valve (6) also needs to consider how to facilitate the air taking of the second gas flow channel (12), which limits the setting of the valve (6), in order to take air from the second gas flow channel (12), it is inevitable to limit the design of the gas flow channel, which is not conducive to the improvement of the smoothness of the gas flow channel. SUMMARY

[0004] In view of the above problems in the prior art, the present application provides a double-flow channel structure, which is beneficial to reduce the mutual influence between two air flows, and the adjustment of the air injection amount does not depend on the air flow amount of the other channel, and the valve is arranged flexibly, which is beneficial to the design of the air flow channel.

[0005] The specific technical solutions are as follows:

[0006] The double-flow channel structure comprises an air inlet channel of a gun body, an air outlet arranged at the front end of the gun body, the air outlet comprises a first outlet and a second outlet, the first outlet and the second outlet are isolated from each other, the air inlet channel is divided into a first air inlet channel and a second air inlet channel which are isolated from each other along the axial direction of the air inlet channel by an isolation structure, the first air inlet channel and the second air inlet channel are respectively communicated with an air inlet of the air inlet channel, the first air inlet channel is communicated with the first outlet to form a first flow channel, the second air inlet channel is communicated with the second outlet to form a second flow channel, and the first flow channel is provided with a valve.

[0007] The above technical solutions have the following beneficial effects:

[0008] Since the air inlet channel is divided into the first air inlet channel and the second air inlet channel which are isolated from each other along the axial direction of the air inlet channel, and the air is from the air inlet of the air inlet channel, the mutual influence between the two air flows is reduced, and the adjustment of the air injection amount does not depend on the air flow amount of the other channel. Since the air is not taken from the other channel, the valve is arranged flexibly, and in theory, the valve can be arranged on the first flow channel. Since the air is not taken from the other channel, the design of the air flow channel is facilitated. In addition, since the air inlet channel is divided into the first air inlet channel and the second air inlet channel which are isolated from each other along the axial direction of the air inlet channel, the flow channel is optimized, and the smoothness of the air flow channel is improved.

[0009] Preferably, the isolation structure adopts an isolation plate which is arranged along the axial direction of the gun body. This structure is simple and compact, occupies less space of the air inlet channel, and is beneficial to the one-piece injection molding with the shell of the gun body, and thus is convenient to manufacture.

[0010] Preferably, the isolation plate adopts a V-shaped structure or an arc-shaped structure, which is beneficial to better distribute the space of the air inlet channel, so that the air flow amounts of the first air inlet channel and the second air inlet channel are optimized.

[0011] Preferably, the side wall of the gun body is provided with a transverse opening which intersects the first flow channel, and the valve is arranged in the transverse opening. This structure is compact, and is beneficial to the design of the flow channel smoothness.

[0012] Preferably, the valve comprises a knob, a knob seat and a valve core, the knob seat is inserted and fixedly connected in the transverse opening, the valve core is rotationally sleeved with the knob seat, and the valve core is fixedly connected with the knob, the knob seat is provided with a communication hole for communicating the first flow channel, and the valve core is used for adjusting the opening range of the communication hole.

[0013] Preferably, the transverse opening is provided with an axial air inlet hole and a transverse air inlet hole as the air inlet of the valve at the intersection with the first flow channel, and the axial air inlet hole and the transverse air inlet hole form a total air inlet, so as to facilitate a larger air inlet and improve the flow channel smoothness.

[0014] Preferably, the side of the central axis of the gun body facing the transverse opening is provided with a mounting surface, the left side of the mounting surface is provided with a sealing surface, after the knob seat is inserted and fixedly connected in the transverse opening, the inner side end surface of the knob seat is connected with the mounting surface and the sealing surface, the mounting surface and the inner side end surface are the transverse air inlet hole, the right side through hole of the knob seat is the axial air inlet hole, the transverse air inlet hole is always communicated with the inside of the knob seat, and the rotary sealing part of the valve core is used for adjusting the opening range of the left side through hole of the knob seat. During the rotation of the rotary sealing part of the valve core for adjusting the opening range of the left side through hole of the knob seat, the air inlet can be always larger than the air outlet, which is conducive to improving the flow channel smoothness.

[0015] Preferably, the central axis of the gun body is communicated with the liquid outlet of the liquid tank of the spray gun, and the liquid tank is also communicated with the first air inlet channel or / and the second air inlet channel, the first air inlet channel or / and the second air inlet channel is used for pressurizing the liquid tank, which is conducive to compact structure and reliable pressurization of the liquid tank, and the pressurization effect is good.

[0016] The application further provides a spray gun comprising a first gas nozzle, a second gas nozzle and a liquid nozzle, the liquid nozzle is located in the middle, the first gas nozzle is located in the circumferential direction of the second gas nozzle, the second gas nozzle is located in the circumferential direction of the liquid nozzle, and the double flow channel structure is arranged.

[0017] The above technical scheme has the following beneficial effects:

[0018] It is conducive to reducing the mutual influence between the two channels, improving the control accuracy of the spray, and making the spray effect better.

[0019] Preferably, the electric gas supply structure is connected with the gun body to form a handheld electric spray gun, and the gas inlet of the gas inlet channel of the double-channel structure is communicated with the output end of the electric gas supply structure, so that the structure is compact and can be handheld, and no other gas source needs to be connected during use, but the gas source is supplied by the electric gas supply structure, which greatly simplifies the gas supply requirement and facilitates use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view of the gun body.

[0021] Figure 2 is a perspective view of the gun body after the nozzle part and the valve are removed. Figure 1

[0022] Figure 3 is a perspective view of the gun body after the nozzle part and the valve are removed. Figure 1

[0023] Figure 4 is a perspective view of the gun body after the nozzle part and the valve are removed. Figure 1

[0024] Figure 5 is a left view of the gun body after the nozzle part and the valve are removed. Figure 1

[0025] Figure 6 is a right view of the gun body after the nozzle part and the valve are removed. Figure 1

[0026] Figure 7 is an A-A sectional view of the gun body. Figure 6

[0027] Figure 8 is a top view of the gun body. Figure 1

[0028] Figure 9 is a B-B sectional view of the gun body. Figure 8

[0029] Figure 10 is a perspective view of the inner ring of the nozzle part.

[0030] Figure 11 is a perspective view of the outer ring of the nozzle part.

[0031] Figure 12 is a perspective view of the inner ring and the outer ring assembled axially.

[0032] Figure 13 is a perspective view of the knob and the valve core.

[0033] Figure 14 ​​​​​​​​Fig. 1 is a perspective view of a knob seat.

[0034] Figure 15 Fig. 2 is a perspective view of a knob, a knob seat and a valve core assembled together.

[0035] Figure 16 Fig. 3 is another perspective view of a knob, a knob seat and a valve core assembled together.

[0036] Figure 17 Fig. 4 is a front view of a spray gun.

[0037] BRIEF DESCRIPTION OF THE DRAWINGS 1. first outlet, 2. second outlet, 3. first gas nozzle, 4. second gas nozzle, 5. liquid nozzle, 6. first gas inlet channel, 7. second gas inlet channel, 8. partition plate, 9. transverse hole, 10. knob, 11. knob seat, 12. valve core, 13. hook, 14. slot, 15. annular platform, 16. axial gas inlet hole, 17. transverse gas inlet hole, 18. central shaft, 19. mounting surface, 20. sealing surface, 21. rotary sealing part, 22. left side through hole, 23. liquid storage tank, 24. liquid outlet channel, 25. pressurized liquid channel, 26. electric gas supply structure, 27. valve needle, 28. adjusting handle, 29. switch button, 30. nut, 31. connecting seat, 32. gas inlet, 33. transverse part, 34. vertical part, 35. gear recess, 36. first air passage, 37. second air passage, 38. rear end, 39. screw hole, 40. inner side end surface, 41. handle, 42. battery box, 43. right side through hole. DETAILED DESCRIPTION

[0038] The following description is presented to enable any person skilled in the art to practice the present application as claimed. The preferred embodiments disclosed herein are merely examples of the best modes contemplated for the present application, and thus are not intended to limit the scope of the present application. The present application, as defined by the appended claims, can be practiced with other embodiments as well, which will be apparent upon reading the specification. Preferred embodiments of the present application are described herein, including the best modes contemplated for the present application. Variations of these preferred embodiments can become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the present application to apply to all such variations that do not depart from the spirit and scope of the present application.

[0039] Those skilled in the art will understand that, in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application.

[0040] The present application is a kind of as Figures 2 to 9As shown in the drawings, a double-flow structure includes an air inlet channel of a gun body, an air outlet arranged at a front end of the gun body, the air outlet including a first outlet 1 and a second outlet 2, the first outlet 1 and the second outlet 2 being isolated from each other, the air inlet channel being divided into a first air inlet channel 6 and a second air inlet channel 7 which are isolated from each other along an axial direction of the air inlet channel, the first air inlet channel 6 and the second air inlet channel 7 being in communication with an air inlet 32 of the air inlet channel respectively, the first air inlet channel 6 being in communication with the first outlet 1 to form a first flow channel, the second air inlet channel 7 being in communication with the second outlet 2 to form a second flow channel, and the first flow channel being provided with a valve.

[0041] As shown in the drawings, Figure 3 , 6 , an isolation structure is arranged in the form of an isolation plate 8 which is arranged along the axial direction of the gun body. In this example, the isolation plate 8 is arranged in the form of a V-shaped structure or an arc-shaped structure. In this example, the isolation plate 8 is arranged in the form of a V-shaped structure.

[0042] As shown in the drawings, Figures 1 to 4 , a lateral opening 9 is arranged in the side wall of the gun body, the lateral opening 9 intersects the first flow channel, and the lateral opening 9 is provided with the valve.

[0043] As shown in the drawings, Figure 2 , 3 and Figures 13 to 16 , the valve includes a knob 10, a knob seat 11 and a valve core 12, the knob seat 11 is inserted and fixedly connected in the lateral opening 9, the valve core 12 is rotatably sleeved with the knob seat 11, and the rear end 38 of the valve core 12 is fixedly connected with the knob 10 after penetrating through the knob seat 11, the knob seat 11 is provided with a communication hole for communicating the first flow channel, and the valve core 12 is used for adjusting the opening range of the communication hole. When the valve is installed, the knob 10, the knob seat 11 and the valve core 12 can be assembled first, and then inserted and fixed in the lateral opening 9. In this example, the insertion and fixation is achieved by using the cooperation structure of a clamping hook 13 and a clamping groove 14, one clamping hook 13 is arranged on the left side and the right side of the knob seat 11 respectively, and the lateral opening 9 is provided with a clamping groove 14 correspondingly. The valve core 12 is fixedly connected with the knob 10, which can be achieved by using a screw, i.e. the screw is inserted into a screw hole 39 to connect the rear end 38 of the valve core 12 with the knob 10, and the knob seat 11 is provided with an annular table 15, so as to cooperate with the valve core 12 to support the valve core 12, so that the rotating sealing part 21 of the valve core 12 is well matched in the knob seat 11, and the cooperation between the annular table 15 and the valve core 12 can also achieve a certain sealing effect, so as to avoid the leakage of the air flow in the knob seat 11 to the side of the knob 10.

[0044] As shown in the drawings, Figure 2 , the intersection between the lateral opening 9 and the first flow channel is provided with an axial air inlet hole 16 and a lateral air inlet hole 17 as the air inlet of the valve.

[0045] As shown in Figures 2 to 4 , the side of the center axis 18 of the gun body facing the transverse hole 9 is provided with a mounting surface 19, the left side of the mounting surface 19 is provided with a sealing surface 20, after the rotary knob base 11 is inserted and fixedly connected in the transverse hole 9, the inner side end surface 40 of the rotary knob base 11 is connected with the mounting surface 19 and the sealing surface 20, the mounting surface 19 and the inner side end surface 40 are the transverse air inlet hole 17, the through hole 43 on the right side of the rotary knob base 11 is the axial air inlet hole 16, the transverse air inlet hole 17 is always in communication with the inside of the rotary knob base 11, the rotary sealing part 21 of the valve core 12 is used for adjusting the opening range of the through hole 22 on the left side of the rotary knob base 11, and the valve structure can refer to Figures 13 to 16 .

[0046] As shown in Figure 7 , 9 , the center axis 18 of the gun body is in communication with the liquid outlet of the liquid storage tank 23 of the spray gun, the liquid storage tank 23 is also in communication with the first air inlet channel 6 or / and the second air inlet channel 7, and the first air inlet channel 6 or / and the second air inlet channel 7 is used for pressurizing the liquid storage tank 23. In this example, a vertical part 34 is arranged in the gun body, a connecting part is arranged on the lower side of the gun body and is used for connecting the liquid storage tank 23, the upper end of the vertical part 34 is in communication with the center axis 18, and the lower end of the vertical part 34 is in communication with the connecting part through the liquid outlet flow channel 24. The foregoing structure is that the liquid storage tank 23 and the gun body are directly connected together through the connecting part, and the liquid storage tank 23 and the gun body can also be arranged separately. In this example, for pressurizing the liquid storage tank 23, the second air inlet channel 7 is used for pressurizing the liquid storage tank 23, specifically, the connecting part is provided with a pressurizing flow channel 25, the pressurizing flow channel 25 is in communication with the second air inlet channel 7. The center axis 18 is provided with a valve needle 27, which is used for opening or closing the liquid spray opening 5. The movement of the valve needle 27 is realized by operating the adjusting handle 28. In order to avoid gas leakage and simplify the sealing arrangement, a transverse part 33 is further arranged in the gun body, the adjusting shaft of the adjusting handle 28 penetrates through the transverse part 33 and the valve needle 27, the two ends of the adjusting shaft are connected with the waist-shaped hole of the adjusting handle 28, and the waist-shaped hole is used to drive the adjusting shaft to axially translate integrally by pulling the adjusting handle 28. The adjusting shaft axially translating integrally drives the valve needle 27 to axially move, so as to realize opening or closing the liquid spray opening 5 and controlling the opening range of the liquid spray opening 5. In this example, the transverse part 33 is integrally injection molded with the shell of the gun body, so as to realize the sealing isolation between the transverse part 33 and the air inlet channel. Similarly, the vertical part 34 is also integrally injection molded with the shell of the gun body, which is beneficial to sealing.

[0047] After the above structure is installed in the nozzle, the gun body shown in Figure 1 , 8 , 9 is obtained.

[0048] As shown in Figure 17 , the center axis 18 of the gun body is in communication with the liquid outlet of the liquid storage tank 23 of the spray gun, the liquid storage tank 23 is also in communication with the first air inlet channel 6 or / and the second air inlet channel 7, and the first air inlet channel 6 or / and the second air inlet channel 7 is used for pressurizing the liquid storage tank 23. In this example, a vertical part 34 is arranged in the gun body, a connecting part is arranged on the lower side of the gun body and is used for connecting the liquid storage tank 23, the upper end of the vertical part 34 is in communication with the center axis 18, and the lower end of the vertical part 34 is in communication with the connecting part through the liquid outlet flow channel 24. The foregoing structure is that the liquid storage tank 23 and the gun body are directly connected together through the connecting part, and the liquid storage tank 23 and the gun body can also be arranged separately. In this example, for pressurizing the liquid storage tank 23, the second air inlet channel 7 is used for pressurizing the liquid storage tank 23, specifically, the connecting part is provided with a pressurizing flow channel 25, the pressurizing flow channel 25 is in communication with the second air inlet channel 7. The center axis 18 is provided with a valve needle 27, which is used for opening or closing the liquid spray opening 5. The movement of the valve needle 27 is realized by operating the adjusting handle 28. In order to avoid gas leakage and simplify the sealing arrangement, a transverse part 33 is further arranged in the gun body, the adjusting shaft of the adjusting handle 28 penetrates through the transverse part 33 and the valve needle 27, the two ends of the adjusting shaft are connected with the waist-shaped hole of the adjusting handle 28, and the waist-shaped hole is used to drive the adjusting shaft to axially translate integrally by pulling the adjusting handle 28. The adjusting shaft axially translating integrally drives the valve needle 27 to axially move, so as to realize opening or closing the liquid spray opening 5 and controlling the opening range of the liquid spray opening 5. In this example, the transverse part 33 is integrally injection molded with the shell of the gun body, so as to realize the sealing isolation between the transverse part 33 and the air inlet channel. Similarly, the vertical part 34 is also integrally injection molded with the shell of the gun body, which is beneficial to sealing.The shown is a spray gun, comprising a first gas nozzle 3, a second gas nozzle 4 and a liquid nozzle 5, the liquid nozzle 5 is located in the middle, the first gas nozzle 3 is located in the circumference of the second gas nozzle 4, the second gas nozzle 4 is located in the circumference of the liquid nozzle 5, provided with the double channel structure, the first channel of the double channel structure is communicated with the first gas nozzle 3, the second channel of the double channel structure is communicated with the second gas nozzle 4.

[0049] Specifically, as Figure 1 and 8 to 12, the front end of the gun body is provided with a nozzle, which is composed of an inner ring and an outer ring, the outer ring, the inner ring and the front end of the gun body are sequentially sleeved and matched in the axial direction, and are installed at the front end of the gun body by using a nut 30. By using the material elasticity, the outer ring can rotate relative to the inner ring, and is provided with a gear recess 35, so that the outer ring can be accurately positioned when rotating relative to the inner ring. The gear recess 35 has four, which are distributed in a cross shape. The outer ring is provided with a first gas nozzle 3 and a second gas nozzle 4, so that the structure can be simplified. The first gas nozzle 3 has two groups, a total of two groups, which are uniformly distributed in the circumference. The second gas nozzle 4 is located in the middle through hole of the outer ring, and the structure of the second gas nozzle 4 is an annular spacing hole between the nozzle where the liquid nozzle 5 in the middle of the inner ring is located and the middle through hole of the outer ring.

[0050] In order to better guide the gas flow into the first gas nozzle 3 and the second gas nozzle 4, the inner ring is provided with a first air passage 36 and a second air passage 37, both of which are annular air passages.

[0051] As Figure 17 shown, the example spray gun is detachably connected with a spray gun electric gas supply structure 26, the electric gas supply structure 26 is connected with the gun body to form a handheld electric spray gun, and the gas inlet 32 of the gas inlet channel of the double channel structure is communicated with the output end of the electric gas supply structure 26.

[0052] The electric gas supply structure 26 forms gas flow by electric motor, impeller and other structures to supply gas, and is provided with a handle 41, and the handle 41 is provided with a switch button 29, which is located on the right side of the adjusting handle 28. When the adjusting handle 28 is operated to the right, the adjusting handle 28 will press the switch button 29, and the switch button 29 will be connected to make the electric motor work. Therefore, when the spray gun works, the electric motor can work and the opening range of the valve needle 27 can be adjusted by the adjusting handle 28, forming a linkage function, which greatly facilitates the use of the spray gun.

[0053] In order to further remove the use of restraint, the example spray gun uses battery power supply, and the battery box 42 is arranged at the lower end of the handle 41.

[0054] The above example gas source is supplied by the electric gas supply structure 26, and the gas source can also be other structures, such as compressed gas.

[0055] The above example liquid storage tank 23 is a pressurized liquid supply structure, but it can also be a gravity liquid supply structure or both a gravity liquid supply structure and a pressurized liquid supply structure. The gravity liquid supply structure refers to the liquid storage tank 23 being inverted, and the liquid automatically flows into the liquid injection port 5 by gravity. The gravity liquid supply structure and the pressurized liquid supply structure both refer to the liquid storage tank 23 not only being inverted, but also being pressurized. The above structures are all applicable to the present application.

[0056] The present application realizes double-flow channel design by ingenious design, reduces the mutual influence between the two air flows, in addition, the adjustment of the air injection amount does not need to depend on the ventilation amount of the other path, the valve setting is more flexible, which is beneficial to the air flow channel design, and the present application makes the spray gun more useful.

[0057] The above is an example of the present application, but it should not be understood as a limitation on the claims. The present application is not limited to the above examples, and the specific structure can be changed. Any changes made within the scope of the independent claims of the present application are within the scope of the present application.

Claims

1. A double flow structure comprising an air inlet channel of a gun body, an air outlet arranged at a front end of the gun body, the air outlet comprising a first outlet (1) and a second outlet (2), the first outlet (1) and the second outlet (2) being isolated from each other, characterized in that, The air inlet channel is divided into a first air inlet channel (6) and a second air inlet channel (7) by a partition structure along the axial direction of the air inlet channel, the first air inlet channel (6) and the second air inlet channel (7) are in communication with the air inlet (32) of the air inlet channel, the first air inlet channel (6) is in communication with the first outlet (1) to form a first flow channel, the second air inlet channel (7) is in communication with the second outlet (2) to form a second flow channel, and the first flow channel is provided with a valve; The side wall of the gun body is provided with a transverse opening (9), the transverse opening (9) intersects the first flow channel, and the transverse opening (9) is provided with a valve; The valve comprises a knob (10), a knob seat (11) and a valve core (12), the knob seat (11) is inserted and fixedly connected in the transverse opening (9), the valve core (12) is rotationally sleeved with the knob seat (11), and the valve core (12) is fixedly connected with the knob (10); the knob seat (11) is provided with a communication hole for communicating the first flow channel, and the valve core (12) is used for adjusting the opening range of the communication hole; The intersection of the transverse opening (9) and the first flow channel is provided with an axial air inlet hole (16) and a transverse air inlet hole (17) as the air inlet of the valve; The side of the central axis (18) of the gun body facing the transverse opening (9) is provided with a mounting surface (19), the left side of the mounting surface (19) is provided with a sealing surface (20), after the knob seat (11) is inserted and fixedly connected in the transverse opening (9), the inner side end surface (40) of the knob seat (11) is connected with the mounting surface (19) and the sealing surface (20), the mounting surface (19) and the inner side end surface (40) are the transverse air inlet hole (17), the right side through hole (43) of the knob seat (11) is the axial air inlet hole (16), the transverse air inlet hole (17) is always in communication with the inside of the knob seat (11), and the rotary sealing part (21) of the valve core (12) is used for adjusting the opening range of the left side through hole (22) of the knob seat (11); The partition structure adopts a partition plate (8) arranged along the axial direction of the gun body.

2. The dual flow channel structure of claim 1, wherein, The partition plate (8) adopts a V-shaped structure or an arc-shaped structure.

3. The dual flow channel structure of claim 1, wherein, The central axis (18) of the gun body is in communication with the liquid outlet of the liquid storage tank (23) of the spray gun, the liquid storage tank (23) is also in communication with the first air inlet channel (6) or / and the second air inlet channel (7), and the first air inlet channel (6) or / and the second air inlet channel (7) are used for pressurizing the liquid storage tank (23).

4. A spray gun comprising a first gas spout (3), a second gas spout (4) and a liquid spout (5), the liquid spout (5) being located in the middle, the first gas spout (3) being located in the circumference of the second gas spout (4), the second gas spout (4) being located in the circumference of the liquid spout (5), characterized in that, The double-flow channel structure of any one of claims 1 to 3 is provided, the first flow channel of the double-flow channel structure is in communication with the first gas nozzle (3), and the second flow channel of the double-flow channel structure is in communication with the second gas nozzle (4).

5. The lance of claim 4, wherein The electric gas supply structure (26) is further connected with the gun body to form a handheld electric spray gun, and the air inlet (32) of the air inlet channel of the double-flow channel structure is in communication with the output end of the electric gas supply structure (26).

Images