Spray gun and flow guide pipe structure thereof

Abstract

The utility model provides a spray gun and a flow guide pipe structure thereof. The flow guide pipe comprises an inner pipe body, the inner pipe body is recessed inwards to form two limiting protrusions, a flow guide piece is installed in the inner pipe body, a flow guide groove is formed in the flow guide piece, the flow guide piece is limited between the two limiting protrusions, and water flow at the positions of the two limiting protrusions can penetrate through the flow guide groove to achieve convection. After water flow in a disordered state enters the flow guide groove of the flow guide part from the limiting bulge on one side, the flow guide groove can generate a secondary guide effect on the water flow, so that the original water flow in the disordered state flows towards the basically same direction again, and the spraying range of sprayed water is relatively long under the guide effect of the flow guide pipe with the flow guide part; in addition, the two limiting protrusions can limit the flow guide part, and displacement of the flow guide part caused by water flow impact is avoided.

Description

Technical Field

[0001] The utility model relates to a spray gun, and in particular to a spray gun and a flow guide pipe structure thereof. Background Art

[0002] The existing technical structure of a spray gun is disclosed in a new type specification bulletin with a certificate number of TWM483129U, which discloses an adjustable air-liquid spray gun. Its main structure includes a handle, an inlet liquid pipe and an air flow regulating valve are respectively installed at both ends of the handle. An inner pipe and an outer pipe are installed at the end of the inlet liquid pipe away from the handle. The outer pipe is sleeved outside the inner pipe. A liquid delivery pipe is also installed on the inlet liquid pipe. A liquid outlet head is installed at the end of the outer pipe away from the inlet liquid pipe. During actual use, the air source enters the inner pipe through the air flow regulating valve, and the water source enters between the inner pipe and the outer pipe through the liquid delivery pipe. Finally, the gas and the liquid converge at the position of the liquid outlet head to achieve the purpose of spraying the liquid under high pressure. What is shown in the existing technology of the above spray gun is that the air source enters the inner pipe and the water source enters between the inner and outer pipes. In actual application, some designers will also inject the water source into the inner pipe to achieve the purpose of discharging water from the middle.

[0003] In addition, as shown in the attached drawings of this application Figure 1 it is shown that in addition to the inner pipe and the outer pipe, a valve core is also provided. A first through hole and a second through hole are provided on the valve core. The first through hole can communicate with the inner pipe, and the second through hole can be aligned with the position between the inner and outer pipes. Then, by rotating the valve core, it is possible to control whether the water source is injected into the inner pipe or between the inner and outer pipes. Although the product structure shown in the attached drawings of this application Figure 1 can smoothly achieve the control of the water flow inflow position, in order to place the inner pipe in the middle position of the outer pipe, the inner pipe adopts a bent design. During actual use, once the water flow in the inner pipe passes through the bent part, the water flow is likely to be chaotic, and the range of the sprayed water is insufficient. Summary of the Utility Model

[0004] In view of this, the first object of the utility model is to provide a flow guide pipe structure through which the water has a longer range.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A flow guide pipe structure includes an inner pipe body. Two limiting protrusions are formed by inward depression of the inner pipe body. A flow guide member is installed in the inner pipe body. The flow guide member is provided with a flow guide groove. The flow guide member is restricted between the two limiting protrusions, and the water flow at the positions of the two limiting protrusions can pass through the flow guide groove to achieve convection.

[0007] Through the above technical solution, after the water flow in a chaotic state enters the guide groove of the guide member from the limiting protrusion on one side, the guide groove can produce a secondary guiding effect on the water flow, so that the water flow in the original chaotic state can flow in basically the same direction again. Therefore, through the guiding effect of the guide pipe with the guide member, the sprayed water has a longer range; in addition, the two limiting protrusions can produce a limiting effect on the guide member to avoid displacement of the guide member due to the impact of the water flow.

[0008] Preferably, a gap is left between the inner tube body between the two limiting protrusions and the outer side wall of the flow guide member.

[0009] Through the above technical solution, under the impact of water flow, the guide member can rotate between the two limiting protrusions, which can further improve the actual guide effect.

[0010] Preferably, a gap is left between the end of the guide member and the limiting protrusion.

[0011] Through the above technical solution, under the impact of water flow, the guide member can also undergo axial displacement of a certain distance, and the entire guide member has a stronger adaptability to chaotic water flow, which can further improve the actual guide effect.

[0012] Preferably, a bending section is provided on the inner tube body, and the bending section is located on a side of the limiting protrusion away from the guide member.

[0013] Through the above technical solution, the bending section is provided to change the position of the end of the inner tube body and adjust the water jetting position.

[0014] Preferably, four guide grooves are provided, and the four guide grooves are evenly distributed along the side of the guide member.

[0015] Through the above technical solution, on the one hand, the four guide grooves can produce four guide paths with outstanding guide effects; on the other hand, the four guide grooves are evenly distributed on the periphery of the guide member. When the water flows through the four guide grooves, the water flow pressure on the four sides of the guide member is relatively uniform, and the use stability is high.

[0016] The second object of the utility model is to provide a spray gun which not only has a long range but also can change the spraying form to meet more spraying scenes.

[0017] In order to solve the above technical problems, the technical solution of the utility model is:

[0018] A spray gun, comprising a liquid inlet pipe, a liquid outlet pipe, an adjustable valve body, and a liquid spraying head. The adjustable valve body is provided with an adjustment port, a liquid inlet interface, and a liquid outlet interface. The liquid inlet pipe is connected to the liquid inlet interface, and the liquid outlet pipe is connected to the liquid outlet interface. The liquid inlet interface is provided with a first liquid inlet hole and a second liquid inlet hole, and the liquid outlet interface is provided with a first liquid outlet hole and a second liquid outlet hole. A valve core is rotatably connected inside the adjustable valve body, and the valve core is provided with a first through hole and a second through hole;

[0019] The liquid spraying head is provided with a first spraying hole and more than two second spraying holes. The second spraying holes are distributed around the first spraying hole. A flow guide pipe is arranged inside the liquid outlet pipe, and the first liquid outlet hole is communicated with the first spraying hole through the flow guide pipe;

[0020] An adjusting member is further installed on the adjustable valve body. The adjusting member is used to drive the valve core to rotate. When the valve core rotates, a first state in which the first liquid inlet hole, the first through hole, and the first liquid outlet hole are communicated with each other can be presented, or a second state in which the second liquid inlet hole, the second through hole, and the second liquid outlet hole are communicated with each other can be presented.

[0021] Through the above technical solution, the valve core can be driven to rotate by the adjusting member. At this time, the following working states can be presented. Working state one is that the first liquid inlet hole, the first through hole, and the first liquid outlet hole are communicated with each other. The liquid flows out in sequence from the liquid inlet pipe, the first liquid inlet hole, the first through hole, the first liquid outlet hole, and the flow guide pipe, and finally sprays out from the first spraying hole. Working state two is that the second liquid inlet hole, the second through hole, and the second liquid outlet hole are communicated with each other. The liquid flows out in sequence from the liquid inlet pipe, the second liquid inlet hole, the second through hole, the second liquid outlet hole, and the liquid outlet pipe, and finally sprays out from the second spraying hole. Thus, the adjustment of two spraying states is realized to meet the requirements of more spraying scenarios;

[0022] In addition, the flow guide member in the flow guide pipe can have a better flow guiding effect on the water flow, and can effectively improve the water spraying range.

[0023] Preferably, a through groove is provided on the outer side wall of the valve core, and the through groove can connect the two orifices of the second through hole on the outer side wall of the valve core.

[0024] With the above technical solution, when the second liquid inlet hole, the second through hole, and the second liquid outlet hole are interconnected, the liquid flows successively from the liquid inlet pipe, the second liquid inlet hole, the second through hole, the second liquid outlet hole, and the liquid outlet pipe. Since there is a spray head with a second spray hole at the end, a part of the water flow near the spray head is bound to flow back and rush towards the side of the second through hole. This part of the water flow will also flow along the through groove, and then the water flow can flow again from the orifice of the second through hole near the second liquid inlet hole to the orifice near the second liquid outlet hole and re-enter the liquid outlet pipe. At this time, a certain turbulent flow effect will be generated in the entire liquid outlet pipe. After this part of the water flow is ejected from the second spray hole, there will also be a certain amount of sprayed liquid at the middle position surrounded by the second spray hole. Compared with the formed hollow spray range, this spray is more uniform.

[0025] Preferably, the number of the through grooves is two, and the two through grooves are arranged along the rotation axis line direction of the valve core.

[0026] With the above technical solution, on the one hand, the number of the through grooves is two, so the water flow back speed is faster; on the other hand, the internal space of the valve core can be effectively utilized, and the overall structure has high compactness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of Embodiment 1;

[0028] Figure 2 is a schematic cross-sectional structural diagram of Embodiment 1;

[0029] Figure 3 is an exploded structural diagram of Embodiment 2;

[0030] Figure 4 is a schematic structural diagram of the adjustable valve body in Embodiment 2;

[0031] Figure 5 is a schematic cross-sectional structural diagram of Embodiment 2;

[0032] Figure 6 is Figure 5 an enlarged view of Part A of

[0033] Figure 7 is a schematic structural diagram of the liquid spray head in Embodiment 2;

[0034] Figure 8 is a schematic structural diagram of the valve core in Embodiment 2.

[0035] Figure numerals: 1. inner tube body; 2. limiting protrusion; 3. guide member; 4. guide groove; 5. liquid inlet pipe; 6. liquid outlet pipe; 7. adjustable valve body; 8. adjusting port; 9. liquid inlet interface; 10. first liquid inlet hole; 11. second liquid inlet hole; 12. liquid outlet interface; 13. first liquid outlet hole; 14. second liquid outlet hole; 15. liquid spray head; 16. first spray hole; 17. second spray hole; 18. adjusting member; 19. through groove; 20. bending section; 21. valve core; 22. first through hole; 23. second through hole. DETAILED DESCRIPTION

[0036] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp. Example

[0037] A flow guide tube structure, see Figure 1 , comprising an inner tube body 1. A bending section 20 may be provided on the inner tube body 1.

[0038] See also Figure 1 as well as Figure 2 The inner tube body 1 is inwardly recessed to form two limiting protrusions 2. The two limiting protrusions 2 can be formed by using a press to deform the tube wall of the inner tube body 1 inwardly, thereby forming the limiting protrusions 2.

[0039] A flow guide 3 is installed in the inner tube 1. The flow guide 3 is provided with flow guide grooves 4, and there are four flow guide grooves 4, which are evenly distributed along the side of the flow guide 3. The cross section of the flow guide 3 shown in this embodiment is a cross shape.

[0040] The guide member 3 is installed between the two limiting protrusions 2, and a gap is left between the inner tube body 1 between the two limiting protrusions 2 and the outer wall of the guide member 3. A gap is left between the end of the guide member 3 and the limiting protrusion 2. The water flow at the position of the limiting protrusion 2 on one side can flow through the guide groove 4 into the position of the limiting protrusion 2 on the other side.

[0041] The bending section 20 is located at a side of the limiting protrusion 2 facing away from the guide member 3 . Example

[0042] A spray gun, see Figure 3 as well as Figure 4 , including a liquid inlet pipe 5, a liquid outlet pipe 6, an adjustable valve body 7, and a liquid spray head 15. The adjustable valve body 7 is provided with an adjusting port 8, a liquid inlet interface 9, and a liquid outlet interface 12. In this embodiment, there are two adjusting ports 8, which are symmetrically arranged at both sides of the adjustable valve body 7.

[0043] See also Figure 5 as well as Figure 6, a first liquid inlet hole 10 and a second liquid inlet hole 11 are provided inside the liquid inlet interface 9, a first liquid outlet hole 13 and a second liquid outlet hole 14 are provided inside the liquid outlet interface 12, the liquid inlet pipe 5 is docked to the liquid inlet interface 9, and the liquid outlet pipe 6 is docked to the liquid outlet interface 12.

[0044] A valve core 21 is rotatably connected inside the adjustable valve body 7, and a first through hole 22 and a second through hole 23 are provided on the valve core 21. O-rings are respectively installed at both ends of the valve core 21, and the O-rings are installed between the valve core 21 and the adjustable valve body 7, and both the first through hole 22 and the second through hole 23 are located between the two O-rings. A through groove 19 is provided on the outer side wall of the valve core 21, and the through groove 19 can connect the two orifices of the second through hole 23 on the outer side wall of the valve core 21. The number of the through grooves 19 shown in this embodiment is two, and the two through grooves 19 are arranged along the rotation axis direction of the valve core 21.

[0045] See Figure 7 , a first spray hole 16 and more than two second spray holes 17 are provided on the spray head 15, and the second spray holes 17 are distributed around the first spray hole 16. A connecting pipe is provided inside the liquid outlet pipe 6, and the first liquid outlet hole 13 and the first spray hole 16 are connected through the connecting pipe.

[0046] See Figure 3 , an adjusting member 18 is further installed on the adjustable valve body 7, and the adjusting member 18 is mainly used to drive the valve core 21 to rotate.

[0047] Among them, the second spray hole 17 is inclined.

[0048] During actual use, at least the following two working states can be presented.

[0049] Working state one: The adjusting member 18 drives the valve core 21 to rotate in one direction, and the first liquid inlet hole 10, the first through hole 22, and the first liquid outlet hole 13 are communicated. The liquid sequentially passes through the liquid inlet pipe 5, the first liquid inlet hole 10, the first through hole 22, the first liquid outlet hole 13, the inner pipe body 1 of the connecting pipe, and the first spray hole 16, and finally the liquid is sprayed out from the first spray hole 16 to achieve direct spraying;

[0050] Working state two: The adjusting member 18 drives the valve core 21 to rotate in the other direction, and the second liquid inlet hole 11, the second through hole 23, and the second liquid outlet hole 14 are communicated. The liquid sequentially passes through the liquid inlet pipe 5, the second liquid inlet hole 11, the second through hole 23, and the second liquid outlet hole 14, enters between the liquid outlet pipe 6 and the connecting pipe. Part of the liquid is sprayed out through the second spray hole 17, and the other part of the liquid passes through the through groove 19, reflows from the orifice of the second through hole 23 close to the liquid inlet pipe 5 into the second through hole 23, and then enters between the liquid outlet pipe 6 and the connecting pipe again and is sprayed out through the second spray hole 17.

[0051] Certainly, the above are only typical examples of the present utility model. In addition, the present utility model may also have many other specific implementation manners. Any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. A diversion tube structure, comprising an inner tube body (1), characterized in that: The inner tube body (1) is recessed inwards to form two limiting protrusions (2), a flow guide (3) is installed in the inner tube body (1), a flow guide groove (4) is provided on the flow guide (3), the flow guide (3) is limited between the two limiting protrusions (2), and water flows at the positions of the two limiting protrusions (2) can pass through the flow guide groove (4) to achieve convection.

2. The diversion tube structure according to claim 1, characterized in that: A gap is left between the inner tube body (1) located between the two limiting protrusions (2) and the outer side wall of the flow guide member (3).

3. The flow guide tube structure according to claim 1, characterized in that: A gap is left between the end of the flow guide (3) and the limiting protrusion (2).

4. The diversion tube structure according to claim 1, characterized in that: The inner tube body (1) is provided with a bending section (20), and the bending section (20) is located on a side of the limiting protrusion (2) facing away from the flow guide member (3).

5. The flow guide tube structure according to claim 1, wherein: Four guide grooves (4) are provided, and the four guide grooves (4) are evenly distributed along the side of the guide member (3).

6. A spray gun, comprising a liquid inlet pipe (5), a liquid outlet pipe (6), an adjustable valve body (7), and a liquid spraying head (15), characterized in that: The adjustable valve body (7) is provided with an adjusting port (8), a liquid inlet interface (9), and a liquid outlet interface (12); the liquid inlet pipe (5) is connected to the liquid inlet interface (9); the liquid outlet pipe (6) is connected to the liquid outlet interface (12); the liquid inlet interface (9) is provided with a first liquid inlet hole (10) and a second liquid inlet hole (11); the liquid outlet interface (12) is provided with a first liquid outlet hole (13) and a second liquid outlet hole (14); a valve core (21) is rotatably connected to the adjustable valve body (7); and the valve core (21) is provided with a first through hole (22) and a second through hole (23); The liquid spray head (15) is provided with a first spray hole (16) and two or more second spray holes (17), wherein the second spray holes (17) are distributed around the first spray hole (16), and the liquid outlet pipe (6) is provided with a guide pipe as claimed in any one of claims 1 to 5, and the first liquid outlet hole (13) is connected to the first spray hole (16) through the guide pipe; The adjustable valve body (7) is also provided with an adjusting member (18), and the adjusting member (18) is used to drive the valve core (21) to rotate. When the valve core (21) rotates, it can present a first state in which the first liquid inlet hole (10), the first through hole (22), and the first liquid outlet hole (13) are connected, or present a second state in which the second liquid inlet hole (11), the second through hole (23), and the second liquid outlet hole (14) are connected.

7. The paint gun according to claim 6, characterized in that: A through groove (19) is provided on the outer wall of the valve core (21), and the through groove (19) can connect the two openings of the second through hole (23) on the outer wall of the valve core (21).

8. The paint gun according to claim 7, characterized in that: The number of the through grooves (19) is two, and the two through grooves (19) are arranged along the direction of the rotation axis of the valve core (21).

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