Leakage-adjustable spray gun

Abstract

The utility model discloses a liquid leakage adjustable spray gun, which belongs to the technical field of spray guns and comprises a shell, a spray gun spring is fixedly mounted in a mounting cap, the bottom of the spray gun spring is fixedly connected with a spring seat, a gun needle adjusting column is mounted in the spring seat in a threaded manner, and a spray gun needle is mounted in the gun needle adjusting column in a threaded manner. A gun needle ball seat is installed at the lower end of the spraying gun needle in a threaded mode, and a sealing ball is fixedly connected into the gun needle ball seat. According to the spraying gun needle sealing device, the sealing ring is tightly pressed by the sealing pressing cap by screwing the sealing rear seat, so that the sealing ring and the O-shaped ring abut against the inner wall of the sealing groove, liquid can be prevented from leaking upwards along the spraying gun needle, the sealing performance is improved, the gun needle adjusting column and the spraying gun needle are arranged, the spraying gun needle can be adjusted by adjusting the gun needle adjusting column, and the sealing effect is improved. And the pressing force value of the spraying gun needle and the moving stroke of the trigger can be adjusted, and the liquid outlet amount can be kept constant when the trigger is pulled to the maximum stroke in subsequent use.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray guns, and particularly relates to a spray gun with adjustable liquid leakage. Background Art

[0002] A spray gun is a tool for spraying coatings, paints and other materials. It is mainly composed of a spray gun body, a nozzle, a trigger and other parts. Through compressed air or other power sources, the coating is atomized and evenly sprayed on the surface of the object to achieve the purpose of coating. The Chinese patent announcement number CN217830443U discloses a portable spray gun, including a spray gun body, a nozzle is arranged at the front end of the spray gun body, and the nozzle is movably connected to the front end of the spray gun body. A handle is arranged at the rear side of the spray gun body, and a wrench is arranged at the lower end of the spray gun body. The wrench is arranged on the side of the handle close to the nozzle. The wrench and the spray gun body are hinged, and also include a spray pot assembly, which is arranged at the upper end of the spray gun body, and the center of gravity of the spray pot assembly is located directly above the handle. That is, in the moment formula M=FL, L is zero, so during the spraying process, the spray pot assembly will not generate torque on the handle position, press the nozzle to tilt downward, and facilitate the spraying operation of the staff.

[0003] The problem with the prior art is that the existing spray guns need to adjust the liquid output by controlling the force of pulling the trigger during use. Since it is difficult to maintain a constant force when manually pulling the trigger, the liquid output cannot be constant, making it difficult to achieve precise spraying. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a leakage-adjustable spray gun, which has the advantages of ensuring a constant liquid output, easy control, and precise spraying. It solves the problem that the existing spray guns need to adjust the liquid output by controlling the force of pulling the trigger during use. Since it is difficult to maintain a constant force when manually pulling the trigger, the liquid output cannot be constant, and it is difficult to achieve precise spraying.

[0005] The utility model is achieved in this way: a leakage adjustable spray gun comprises a shell, a connecting part and a trigger are provided on the shell, a liquid outlet channel communicating with the interior of the shell is provided inside the connecting part, a mounting cap is threadedly installed on the upper end of the shell, a through hole is opened on the upper end of the mounting cap, a spray gun spring is fixedly installed in the mounting cap, a spring seat is fixedly connected to the bottom of the spray gun spring, a sealing back seat is provided at the bottom of the spring seat, a gun needle adjusting column is threadedly installed inside the spring seat, a spray gun needle is threadedly installed on the gun needle adjusting column, a gun needle ball seat is threadedly installed on the lower end of the spray gun needle, a sealing ball is fixedly connected to the gun needle ball seat, a gun head is threadedly installed on the bottom of the shell, a liquid outlet is provided in the middle of the gun head, a sealing alloy seat is fixedly installed in the gun head, the interior of the sealing alloy seat is connected with the liquid outlet, and a sealing pressure cap, an O-ring, a sealing ring and a sealing seat are provided on the spray gun needle.

[0006] As a preferred embodiment of the utility model, the upper end of the spring seat is internally threadedly connected with a nylon ring, and the interior of the nylon ring is threadedly connected to the upper end of the gun needle adjusting column.

[0007] As a preferred embodiment of the utility model, a sealing groove is provided inside the shell, and the sealing back seat is threadedly connected to the inside of the upper end of the sealing groove.

[0008] As a preferred embodiment of the utility model, the sealing pressure cap, O-ring, sealing ring and sealing seat are all installed inside the lower end of the sealing groove, the sealing seat is tightly pressed against the bottom wall of the sealing groove, the sealing ring and sealing pressure cap are sequentially arranged above the sealing seat, and the O-ring is sleeved on the sealing ring.

[0009] As a preferred embodiment of the present invention, the sealing rear seat is used to press the sealing pressure cap, the O-ring, the sealing ring and the sealing seat tightly.

[0010] As a preferred embodiment of the utility model, the spray gun needle extends to the interior of the gun head, and the gun needle ball seat is movably arranged in the gun head.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The utility model tightens the sealing back seat to make the sealing pressure cap press the sealing ring, so that the sealing ring and the O-ring are pressed against the inner wall of the sealing groove, thereby preventing liquid from seeping upward along the spray gun needle and improving the sealing performance.

[0013] The utility model provides a gun needle adjustment column and a spray gun needle, and can adjust the gun needle adjustment column to adjust the force value of the spray gun needle and the travel of the trigger activity, so that when the trigger is pulled to the maximum travel in subsequent use, the liquid output can be kept constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 For the utility model Figure 2 A magnified view of the structure at center;

[0017] Figure 4 For the utility model Figure 2 A magnified view of the structure at B in the middle;

[0018] Figure 5 For the utility model Figure 3 A magnified view of the structure at C in the middle;

[0019] Figure 6 It is an exploded view of the internal structure of the utility model.

[0020] In the figure: 1. shell; 101. sealing groove; 2. mounting cap; 3. through hole; 4. trigger; 5. connecting part; 6. liquid outlet channel; 7. gun head; 8. spray gun spring; 9. spring seat; 901. nylon ring; 902. gun needle adjustment column; 10. sealing back seat; 11. spray gun needle; 12. gun needle ball seat; 13. liquid outlet; 14. sealing pressure cap; 15. O-ring; 16. sealing ring; 17. sealing seat; 18. sealing ball; 19. sealing alloy seat. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 6As shown, a leakage adjustable spray gun provided by an embodiment of the utility model comprises a shell 1, a connecting portion 5 and a trigger 4 are provided on the shell 1, a liquid outlet channel 6 communicating with the interior of the shell 1 is provided inside the connecting portion 5, a mounting cap 2 is threadedly installed on the upper end of the shell 1, a spray gun spring 8 is fixedly installed in the mounting cap 2, a spring seat 9 is fixedly connected to the bottom of the spray gun spring 8, a sealing back seat 10 is provided at the bottom of the spring seat 9, a gun needle adjustment column 902 is threadedly installed inside the spring seat 9, a spray gun needle 11 is threadedly installed on the gun needle adjustment column 902, a gun needle ball seat 12 is threadedly installed on the lower end of the spray gun needle 11, a sealing ball 18 is fixedly connected to the gun needle ball seat 12, a gun head 7 is threadedly installed on the bottom of the shell 1, a liquid outlet 13 is provided in the middle of the gun head 7, a sealing alloy seat 19 is fixedly installed in the gun head 7, the interior of the sealing alloy seat 19 is connected with the liquid outlet 13, and a sealing pressure cap 14, an O-ring 15, a sealing ring 16 and a sealing seat 17 are provided on the spray gun needle 11.

[0024] Furthermore, a nylon ring 901 is threadedly connected to the inner part of the upper end of the spring seat 9 , and the inner part of the nylon ring 901 is threadedly connected to the upper end of the gun needle adjustment column 902 .

[0025] In the present application, the provision of the nylon ring 901 can prevent the gun needle adjustment column 902 from loosening, thereby improving the installation stability of the gun needle adjustment column 902 .

[0026] Furthermore, a sealing groove 101 is provided inside the housing 1, and the sealing back seat 10 is threadedly connected to the upper end of the sealing groove 101, and the sealing pressure cap 14, O-ring 15, sealing ring 16 and sealing seat 17 are all installed inside the lower end of the sealing groove 101, and the sealing seat 17 is tightly pressed against the bottom wall of the sealing groove 101, and the sealing ring 16 and the sealing pressure cap 14 are sequentially arranged above the sealing seat 17, and the O-ring 15 is sleeved on the sealing ring 16, and the sealing back seat 10 is used to press the sealing pressure cap 14, O-ring 15, sealing ring 16 and sealing seat 17 tightly.

[0027] In the present application, a sealing seat 17, a sealing ring 16, a sealing pressure cap 14 and a sealing back seat 10 are sequentially arranged in the sealing groove 101 from bottom to top. By tightening the sealing back seat 10, the sealing pressure cap 14 presses the sealing ring 16, so that the sealing ring 16 and the O-ring 15 are pressed against the inner wall of the sealing groove 101, thereby preventing the liquid from seeping upward along the spray gun needle 11 and improving the sealing performance.

[0028] Furthermore, the spray gun needle 11 extends into the interior of the gun head 7 , and the gun needle ball seat 12 is movably disposed in the gun head 7 .

[0029] In the present application, the lower chamber of the spray gun, i.e., the lower end of the housing 1, is sealed by the elastic force of the spray gun spring 8, through the sealing ball 18 and the sealing alloy seat 19. A hexagonal bolt hole is provided on the top of the needle adjustment column 902. The upper end of the sealing rear seat 10 is plugged into the spring seat 9. The sealing seat 17 can prevent the spring seat 9 from rotating. When adjusting the liquid output, the auxiliary rod with the hexagonal bolt is inserted into the through hole 3 to connect with the needle adjustment column 902. The needle adjustment column 902 is driven to rotate by rotating the auxiliary rod. The threaded cooperation between the needle adjustment column 902 and the nylon ring 901 makes the needle adjustment column 902 move upward or downward accordingly. The needle adjustment column 902 drives the spray gun needle 11 to move synchronously, so that the sealing ball 18 at the lower end moves in the direction away from or close to the sealing alloy seat 19, thereby correspondingly increasing or decreasing the liquid output.

[0030] The working principle of this utility model:

[0031] When the spray gun is in use, the spring seat 9, the needle adjustment column 902 and the spray gun needle 11 are moved upward by pulling the trigger 4, so that the sealing ball 18 is away from the sealing alloy seat 19, and the liquid at the lower end of the spray gun is sprayed out from the gap of the needle ball seat 12 and the liquid outlet 13. The leakage amount is adjusted by adjusting the stroke of the trigger 4. When the spray gun is closed, the auxiliary rod is inserted into the through hole 3 to connect with the needle adjustment column 902, and the auxiliary rod is rotated to drive the needle adjustment column 902 to rotate, so that the needle adjustment column 902 moves upward or downward accordingly, and at the same time drives the spray gun needle 11 and the sealing ball 18 to move synchronously, correspondingly increasing or decreasing the liquid output. Through this adjustment, the pressing force value of the spray gun needle 11 and the active stroke of the trigger 4 can be adjusted, and when the trigger 4 is pulled to the maximum stroke in subsequent use, the liquid output can be kept constant.

[0032] In summary: this leakage-adjustable spray gun, by tightening the sealing back seat 10 so that the sealing pressure cap 14 presses the sealing ring 16, so that the sealing ring 16 and the O-ring 15 are pressed against the inner wall of the sealing groove 101, thereby preventing the liquid from seeping upward along the spray gun needle 11 and improving the sealing performance. By setting the gun needle adjustment column 902 and the spray gun needle 11 and adjusting the gun needle adjustment column 902, the pressing force value of the spray gun needle 11 and the travel of the trigger 4 can be adjusted, so that when the trigger 4 is pulled to the maximum travel in subsequent use, the liquid output can be kept constant.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage adjustable spray gun, comprising a housing (1), characterized in that: The housing (1) is provided with a connecting portion (5) and a trigger (4); the connecting portion (5) is provided with a liquid outlet channel (6) communicating with the interior of the housing (1); a mounting cap (2) is threadedly mounted on the upper end of the housing (1); a through hole (3) is provided on the upper end of the mounting cap (2); a spray gun spring (8) is fixedly mounted inside the mounting cap (2); a spring seat (9) is fixedly connected to the bottom of the spray gun spring (8); a sealing rear seat (10) is provided at the bottom of the spring seat (9); a gun needle adjustment column (902) is threadedly mounted inside the spring seat (9); the gun needle adjustment column (902) ) is threadedly mounted with a spray gun needle (11), a gun needle ball seat (12) is threadedly mounted on the lower end of the spray gun needle (11), a sealing ball (18) is fixedly connected to the inside of the gun needle ball seat (12), a gun head (7) is threadedly mounted on the bottom of the housing (1), a liquid outlet (13) is arranged in the middle of the gun head (7), a sealing alloy seat (19) is fixedly mounted in the gun head (7), the inside of the sealing alloy seat (19) is connected to the liquid outlet (13), and a sealing pressure cap (14), an O-ring (15), a sealing ring (16) and a sealing seat (17) are arranged on the spray gun needle (11).

2. A leakage adjustable spray gun as claimed in claim 1, characterized in that: The upper end of the spring seat (9) is internally threadedly connected to a nylon ring (901), and the interior of the nylon ring (901) is threadedly connected to the upper end of a gun needle adjustment column (902).

3. A leakage adjustable spray gun as claimed in claim 1, characterized in that: A sealing groove (101) is provided inside the housing (1), and the sealing rear seat (10) is threadedly connected to the interior of the upper end of the sealing groove (101).

4. A leakage adjustable spray gun as claimed in claim 3, characterized in that: The sealing pressure cap (14), the O-ring (15), the sealing ring (16) and the sealing seat (17) are all installed inside the lower end of the sealing groove (101); the sealing seat (17) is tightly abutted against the bottom wall of the sealing groove (101); the sealing ring (16) and the sealing pressure cap (14) are sequentially arranged above the sealing seat (17); and the O-ring (15) is sleeved on the sealing ring (16).

5. The leakage adjustable spray gun according to claim 1, characterized in that: The sealing rear seat (10) is used to tightly press the sealing pressure cap (14), the O-ring (15), the sealing ring (16) and the sealing seat (17).

6. The leakage adjustable spray gun according to claim 1, characterized in that: The spray gun needle (11) extends into the interior of the gun head (7), and the gun needle ball seat (12) is movably disposed in the gun head (7).

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