HVLP spray gun capable of conveniently adjusting spraying mode

Abstract

The utility model discloses an HVLP spray gun convenient for adjusting a spraying mode, which relates to the field of HVLP spray guns, and comprises a gun body assembly and a mounting channel which is arranged on a liquid storage bottle and is provided with a closed end and an open end along the axial direction of the gun body assembly; the gun needle assembly comprises a gun needle head part and a gun needle tail part detachably connected to the gun needle head part, the gun needle tail part is supported at the closed end of the mounting channel through a spring, so that the gun needle head part penetrates out of the open end of the mounting channel, and the gun needle head part is sleeved with a copper nozzle; the handle assembly is connected to the gun body assembly; the adjusting assembly is connected to the gun body assembly, the adjusting assembly comprises a separator A, a separator B, a nozzle cap and a direction adjusting ring which are sequentially arranged on the gun body assembly in a sleeving mode, the copper nozzle is sleeved with the nozzle cap in a relatively rotating mode, the nozzle cap and the gun body assembly are locked through a locking nut and pressed on the nozzle cap, and the copper nozzle is tightly pressed at the open end of the installation channel through the separator B. According to the utility model, the spraying mode is convenient to adjust, and the adjustment is more labor-saving and rapid.

Description

Technical Field

[0001] The utility model relates to the field of HVLP spray guns, in particular to an HVLP spray gun which is convenient for adjusting a spraying mode. Background Art

[0002] The HVLP (high volume, low pressure) spray system generates a low-pressure, high-volume air flow to apply fluid sprays such as paint, water, oil, stains, finishes, coatings, solvents and solutions to the desired surface. In different application scenarios, the spray gun needs to be adjusted to obtain the appropriate spray speed and spray shape. The existing HVLP spray guns are basically adjusted using three parts: a locking nut, a nozzle cap and a separator. It is more laborious for the user to turn the locking nut, making the adjustment less convenient. In addition, there are relatively few corresponding spray modes (functions) based on a single separator, and the versatility is poor. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an HVLP spray gun which is convenient for adjusting the spraying mode, so that the spraying mode can be adjusted more easily and quickly.

[0004] The purpose of the utility model is achieved through the following technical solution: This HVLP spray gun that is easy to adjust the spraying mode includes:

[0005] The gun body assembly is mounted on the liquid storage bottle, and an installation channel with one end closed and the other end open is arranged along the axial direction of the gun body assembly;

[0006] The gun needle assembly includes a gun needle head and a gun needle tail detachably connected to the gun needle head, the gun needle tail is supported at the closed end of the installation channel by a spring so that the gun needle head passes through the open end of the installation channel, and the gun needle head is sleeved with a copper nozzle;

[0007] a handle assembly connected to the gun body assembly and adjacent the closed end of the mounting passage; and

[0008] An adjustment assembly is connected to the gun body assembly and is close to the open end of the installation channel. The adjustment assembly includes a separator A, a separator B, a nozzle cap and a direction adjustment ring which are sequentially sleeved on the gun body assembly. The nozzle cap is relatively rotatably sleeved on the outside of the copper nozzle. The locking nut is used to lock the gun body assembly and press on the nozzle cap, so that the separator B presses the copper nozzle against the open end of the installation channel.

[0009] The direction-adjusting ring is relatively rotatably sleeved on the locking nut and is positioned with the nozzle cap. The nozzle cap is driven to rotate by rotating the direction-adjusting ring.

[0010] As a further technical solution, it also includes a trigger connected to the gun body assembly and an adjusting knob installed on the trigger, a push rod is radially arranged through the tail of the gun needle, a waist-shaped hole connected to the installation channel is opened on the outer wall of the gun body assembly, the push rod extends from the waist-shaped hole and is connected to the trigger, and when the trigger is pulled, the push rod slides along the waist-shaped hole, causing the gun needle assembly to slide along the installation channel.

[0011] As a further technical solution, a liquid inlet channel is opened radially along the gun body assembly, one end of the liquid inlet channel is connected to the liquid storage bottle, and the other end is connected to the installation channel. When the gun needle assembly slides along the installation channel, the area of ​​the liquid inlet channel opening is adjusted by the blocking block arranged on the tail of the gun needle, thereby controlling the spraying amount.

[0012] As a further technical solution, a positioning flange is provided on the outer wall of the separator A for fitting into a corresponding notch on the gun body assembly. An adjustment groove is provided at the end of the notch along the circumferential direction of the gun body assembly to allow the separator A to rotate relative to the circumferential direction of the gun body assembly.

[0013] As a further technical solution, a blocking surface is set on the side of separator A facing separator B, and a plurality of separation holes are evenly distributed along the circumferential direction of the blocking surface. The same number of separation holes are also evenly distributed along the circumferential direction on separator B. When separator A rotates, the spraying amount is adjusted by cooperating between the blocking surface and the separation holes on separator B.

[0014] As a further technical solution, two bosses are provided on the nozzle cap, each boss is provided with an auxiliary spray hole, and the auxiliary spray hole is connected with the separation hole of the separator B to realize auxiliary steam injection.

[0015] As a further technical solution, a plurality of positioning blocks are provided on the adjustment ring, so that the boss is inserted between two adjacent positioning blocks. When the adjustment ring is rotated, the nozzle cap is driven to rotate relative to the separator B, thereby adjusting the connection area between the auxiliary spray hole and the separation hole on the separator B.

[0016] As a further technical solution, the outer wall of the copper nozzle is provided with a step for positioning on the central hole of the separator B.

[0017] The beneficial effects of the utility model are:

[0018] 1. After the adjustment ring and the nozzle cap are positioned, the nozzle cap is directly driven to rotate, and there is no need to turn the nozzle cap by hand, which is more convenient and labor-saving when used;

[0019] 2. When the trigger is pulled, the area of ​​the liquid inlet channel can be adjusted through the blocking block at the tail of the gun needle to control the spraying amount;

[0020] 3. Separator A can rotate relative to the circumferential direction of the gun body assembly, and the spraying amount can be adjusted by cooperating with the separation hole on the blocking surface and separator B;

[0021] 4. The nozzle cap rotates relative to the separator B, thereby adjusting the connection area between the auxiliary spray hole and the separation hole on the separator B. Through the coordination of various parts, various spraying adjustments can be achieved, with better versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0023] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0024] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0025] Figure 4 It is a schematic diagram of the top view of the gun body assembly in the utility model.

[0026] Figure 5 for Figure 4 BB cross-sectional view.

[0027] Figure 6 It is a structural schematic diagram of the gun needle assembly in the utility model.

[0028] Figure 7 It is a structural schematic diagram of the adjustment component in the utility model.

[0029] Figure 8 It is a schematic diagram of the exploded structure of the regulating component in the utility model.

[0030] Explanation of the accompanying reference numerals: adjustment ring 1, locking nut 2, nozzle cap 3, separator B4, separator A5, copper nozzle 6, gun needle head 7, gun body assembly 8, liquid storage bottle 9, trigger 10, adjustment knob 11, handle assembly 12, gun needle tail 13, installation channel 14, spring 15, push rod 16, waist-shaped hole 17, liquid inlet channel 18, notch 19, positioning flange 20, step 21, center hole 22, separation hole 23, blocking surface 24, adjustment slide groove 25, positioning block 26, boss 27, auxiliary spray hole 28, blocking block 29. DETAILED DESCRIPTION

[0031] The utility model will be described in detail below with reference to the accompanying drawings:

[0032] Example: As attached Figures 1 to 8As shown, the HVLP spray gun which is convenient for adjusting the spraying mode comprises a direction adjustment ring 1, a locking nut 2, a nozzle cap 3, a separator B4, a separator A5, a copper nozzle 6, a gun needle head 7, a gun body assembly 8, a liquid storage bottle 9, a trigger 10, an adjustment knob 11, a handle assembly 12, a gun needle tail 13, a mounting channel 14, a spring 15, a push rod 16, a waist-shaped hole 17, a liquid inlet channel 18, a notch 19, a positioning flange 20, a step 21, a center hole 22, a separation hole 23, a blocking surface 24, an adjustment slide groove 25, a positioning block 26, a boss 27, an auxiliary spray hole 28 and a blocking block 29.

[0033] Reference Figure 1 , 2 5, a mounting channel 14 is provided along the axial direction of the gun body assembly 8, one end of the mounting channel 14 is closed and the other end is open. Figure 6 As shown, the needle head 7 and the needle tail 13 are threadedly connected to form a needle assembly, and the needle tail 13 is supported at the closed end of the installation channel 14 by a spring 15, so that the needle head 7 passes through the open end of the installation channel 14, and a copper nozzle 6 is set on the needle head 7. Preferably, as Figure 8 As shown, a step 21 is provided on the outer wall of the copper nozzle 6, which can be positioned on the central hole 22 of the separator B4. Figure 3 As shown, a trigger 10 is sleeved in the middle of the gun body assembly 8, and the trigger 10 is rotatably connected to the gun body assembly 8, and an adjustment knob 11 is installed on the trigger 10. Figure 5 , 6 As shown, a push rod 16 is radially provided through the tail of the gun needle 13, and a waist-shaped hole 17 connected to the installation channel 14 is provided on the outer wall of the gun body assembly 8. The push rod 16 extends from the waist-shaped hole 17 and is connected to the trigger 10. When the trigger 10 is pulled, the push rod 16 slides along the waist-shaped hole 17, driving the gun needle assembly to slide along the installation channel 14. The gun body assembly 8 is installed on the liquid storage bottle 9, and a liquid inlet channel 18 (direction perpendicular to the installation channel 14) is provided along the radial direction of the gun body assembly 8. The lower end of the liquid inlet channel 18 is connected to the liquid storage bottle 9, and the upper end is connected to the installation channel 14. When the gun needle assembly slides along the installation channel 14, the area of ​​the liquid inlet channel 18 opened is adjusted by the blocking block 29 provided on the tail of the gun needle 13, thereby controlling the spraying amount. In the natural state, the spring 15 is stretched, so that the blocking block 29 is located near the upper opening of the liquid inlet channel 18.

[0034] like Figure 1 , 3 As shown, the handle assembly 12 is connected by threads on the left side of the gun body assembly 8 (i.e., the closed end near the installation channel 14); the adjustment assembly is installed on the right side of the gun body assembly 8 (i.e., the open end near the installation channel 14). Figure 7 , 8As shown, the adjustment assembly includes a separator A5, a separator B4, a nozzle cap 3 and a direction adjustment ring 1 which are sequentially sleeved on the gun body assembly 8. The nozzle cap 3 is relatively rotatably sleeved on the copper nozzle 6. The locking nut 2 is threadedly connected and locked with the gun body assembly 8 and pressed on the nozzle cap 3, so that the separator B4 presses the copper nozzle 6 against the open end of the installation channel 14. Figure 2 As shown, after assembly, the locking nut 2 presses the nozzle cap 3, the nozzle cap 3 presses the separator B4, and the separator B4 presses the copper nozzle 6 and the separator A5.

[0035] Further, such as Figure 4 , 5 As shown, a notch 19 is provided at the right end of the gun body assembly 8, and a positioning flange 20 is provided on the outer wall of the separator A5, which can be inserted into the notch 19. An adjustment slot 25 is provided at the end of the notch 19 along the circumferential direction of the gun body assembly 8. After the positioning flange 20 is inserted into the notch 19, the separator A5 can rotate relative to the circumferential direction of the gun body assembly 8. Figure 8 As described above, a blocking surface 24 is provided on the side of the separator A5 facing the separator B4, and four separation holes 23 are evenly distributed along the circumferential direction of the blocking surface 24. Four separation holes 23 are also evenly distributed on the separator B4 along the circumferential direction. When the separator A5 rotates, the blocking surface 24 cooperates with the separation holes 23 on the separator B4 to achieve the adjustment of the spraying amount. Two bosses 27 are provided on the nozzle cap 3, and each boss 27 is provided with an auxiliary spray hole 28. The auxiliary spray hole 28 is connected with the separation hole 23 of the separator B4 to achieve auxiliary steam injection. Preferably, four positioning blocks 26 are provided on the adjustment ring 1, so that the boss 27 is inserted between two adjacent positioning blocks 26, and the adjustment ring 1 is relatively rotatably sleeved on the locking nut 2. When the adjustment ring 1 is rotated, the nozzle cap 3 can be synchronously driven to rotate relative to the separator B4, thereby adjusting the connection area between the auxiliary spray hole 28 and the separation hole 23 on the separator B4. The function of the steering ring 1 is to rotate the nozzle cap 3 with less effort. The nozzle cap 3 can be driven to rotate by rotating the large outer ring (i.e. the steering ring 1 itself). There is no need to separately turn the nozzle cap 3 from the front for rotation, making the spraying process more convenient and labor-saving.

[0036] The working process of this utility model:

[0037] During assembly, the gun needle head 7 is threadedly connected and installed to the gun needle tail 13, and the copper nozzle 6 is installed at the front end of the gun needle head 7. The separator A5 and the separator B4 are installed to the corresponding positions of the gun body assembly 8. The separator A5 and the separator B4 can adjust the spray shape, which has more functions than ordinary conventional spray guns. Then lock the locking nut 2, the nozzle cap 3 and the previously installed separator A5, the separator B4, and the copper nozzle 6. Then put the adjustment ring 1 on the locking nut 2 and install it in the corresponding position of the nozzle cap 3. The function of the adjustment ring 1 is to rotate the nozzle cap 3 with less effort. The nozzle cap 3 can be driven to rotate by rotating the large outer ring (that is, the adjustment ring 1 itself), and there is no need to turn the nozzle cap 3 separately in front to rotate it, which makes the spraying process more convenient and labor-saving. When the trigger 10 is pulled, the gun needle assembly is driven to slide along the inner wall of the installation channel 14, and the opening area of ​​the liquid inlet channel 18 is adjusted by the blocking block 29 on the gun needle tail 13, so as to control the spraying amount; the separator A5 can rotate in a circular direction relative to the gun body assembly 8, and by twisting the separator A5, the blocking surface 24 is matched with the separation hole 23 on the separator B4 to achieve the spraying amount adjustment; the nozzle cap 3 can rotate relative to the separator B4, so as to adjust the connection area between the auxiliary spray hole 28 and the separation hole 23 on the separator B4. Through the cooperation of various parts, various methods of spraying adjustment can be realized, and the versatility is better.

[0038] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A HVLP spray gun that is easy to adjust the spraying mode, characterized in that: include: A gun body assembly (8) is mounted on the liquid storage bottle (9), and a mounting channel (14) with one end closed and the other end open is arranged along the axial direction of the gun body assembly (8); The gun needle assembly comprises a gun needle head (7) and a gun needle tail (13) detachably connected to the gun needle head (7), the gun needle tail (13) being supported at the closed end of the installation channel (14) by a spring (15) so that the gun needle head (7) passes through the open end of the installation channel (14), and the gun needle head (7) is sleeved with a copper nozzle (6); A handle assembly (12) connected to the gun body assembly (8) and adjacent to the closed end of the mounting channel (14); as well as An adjustment assembly is connected to the gun body assembly (8) and is close to the open end of the installation channel (14). The adjustment assembly includes a separator A (5), a separator B (4), a nozzle cap (3) and a direction adjustment ring (1) which are sequentially sleeved on the gun body assembly (8). The nozzle cap (3) is relatively rotatably sleeved on the outside of the copper nozzle (6). The locking nut (2) is locked with the gun body assembly (8) and pressed on the nozzle cap (3), so that the separator B (4) presses the copper nozzle (6) against the open end of the installation channel (14); The adjustment ring (1) is relatively rotatably sleeved on the locking nut (2) and is positioned with the nozzle cap (3). The nozzle cap (3) is driven to rotate by rotating the adjustment ring (1).

2. The HVLP spray gun with easy-to-adjust spraying mode according to claim 1, characterized in that: The invention also comprises a trigger (10) rotatably connected to the gun body assembly (8) and an adjusting knob (11) mounted on the trigger (10); a push rod (16) is radially arranged through the tail of the gun needle (13); a waist-shaped hole (17) communicating with the mounting channel (14) is arranged on the outer wall of the gun body assembly (8); the push rod (16) extends from the waist-shaped hole (17) and is connected to the trigger (10); when the trigger (10) is pulled, the push rod (16) slides along the waist-shaped hole (17), so that the gun needle assembly slides along the mounting channel (14).

3. The HVLP spray gun with easy-to-adjust spraying mode according to claim 2, characterized in that: A liquid inlet channel (18) is provided along the radial direction of the gun body assembly (8), one end of the liquid inlet channel (18) is connected to the liquid storage bottle (9), and the other end is connected to the installation channel (14). When the gun needle assembly slides along the installation channel (14), the opening area of ​​the liquid inlet channel (18) is adjusted by a blocking block (29) provided on the gun needle tail (13), thereby controlling the spraying amount.

4. The HVLP spray gun with easy-to-adjust spraying mode according to claim 1, characterized in that: The separator A (5) is provided with a positioning flange (20) on its outer wall for fitting into a corresponding notch (19) on the gun body assembly (8). An adjusting groove (25) is provided at the end of the notch (19) along the circumferential direction of the gun body assembly (8) so that the separator A (5) can rotate relative to the circumferential direction of the gun body assembly (8).

5. The HVLP spray gun with easy-to-adjust spraying mode according to claim 4, characterized in that: The separator A (5) is provided with a blocking surface (24) on one side facing the separator B (4), and a plurality of separation holes (23) are evenly distributed along the circumferential direction of the blocking surface (24). The separator B (4) also has the same number of separation holes (23) evenly distributed along the circumferential direction. When the separator A (5) rotates, the blocking surface (24) cooperates with the separation holes (23) on the separator B (4) to achieve spraying amount adjustment.

6. The HVLP spray gun with easy-to-adjust spraying mode according to claim 5, characterized in that: The nozzle cap (3) is provided with two bosses (27), each boss (27) is provided with an auxiliary spray hole (28), and the auxiliary spray hole (28) is connected with the separation hole (23) of the separator B (4) to realize auxiliary steam injection.

7. The HVLP spray gun with easy-to-adjust spraying mode according to claim 6, characterized in that: The adjustment ring (1) is provided with a plurality of positioning blocks (26), so that the boss (27) is inserted between two adjacent positioning blocks (26). When the adjustment ring (1) is rotated, the nozzle cap (3) is driven to rotate relative to the separator B (4), thereby adjusting the communication area between the auxiliary spray hole (28) and the separation hole (23) on the separator B (4).

8. The HVLP spray gun with easy-to-adjust spraying mode according to claim 7, characterized in that: The outer wall of the copper nozzle (6) is provided with a step (21) for positioning on the central hole (22) of the separator B (4).

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