Double-fluid atomizing spray gun

Abstract

The utility model discloses a double-fluid atomizing spray gun which comprises a main pipe body and a spray head located at one end of the main pipe body, a fluid conveying pipe is arranged at the end, away from the spray head, of the main pipe body, the pipe diameter of the fluid conveying pipe is smaller than that of the main pipe body, the fluid conveying pipe extends into the main pipe body, and a reducing section is arranged at the end, located in the main pipe body, of the fluid conveying pipe. The inner diameter of the reducing section is gradually reduced along the liquid flow direction; an outer protection pipe is arranged on the main pipe body and located on the periphery of the fluid conveying pipe, and air inlets are formed in the main pipe body and located on the two sides in the outer protection pipe. A gas conveying pipe is arranged at the upper end of the outer protective pipe, and a flow adjusting assembly is arranged on the gas conveying pipe; and a Venturi pipeline is arranged in the main pipe body and is close to the reducing section. The device has the advantages of adjusting the gas flow and improving the gas-liquid fusion rate.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a dual-fluid atomizing spray gun. Background Art

[0002] The dual-fluid spray gun mainly relies on the air compressor to provide compressed air, and uses the compressed air to atomize the liquid. The existing dual-fluid spray gun gas directly enters the tube body through the gas delivery pipe, and there is no gas flow adjustment structure. It is impossible to adjust the gas flow according to the use requirements and change the amount of spray; and the gas and liquid mixing chamber does not have any components to promote the fusion of gas and fluid, and the gas-liquid fusion is generally poor. Utility Model Content

[0003] The utility model solves the above technical problems and provides a double-fluid atomizing spray gun which has the function of regulating gas flow and improving gas-liquid fusion rate.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a dual-fluid atomizing spray gun, comprising a main body and a nozzle located at one end of the main body, the structure of which is a known technology and will not be described here;

[0005] One end of the main body away from the nozzle is connected to a fluid delivery pipe, the diameter of the fluid delivery pipe is smaller than the diameter of the main body, the fluid delivery pipe extends into the main body, and there is a gap between one end located in the main body and the outer side of the main body, and one end located in the main body is provided with a reducing section, and the inner diameter of the reducing section gradually decreases along the flow direction of the liquid;

[0006] An outer protective tube is sleeved on the main body and located on the outer periphery of the fluid delivery tube. Furthermore, a gap is provided between the inner surface of the outer protective tube and the outer surface of the main body, and the gap serves as a channel for gas flow;

[0007] Air inlets are provided on both sides of the main pipe and inside the outer protective pipe;

[0008] A gas delivery pipe is arranged at the upper end of the outer protective pipe, and a flow regulating component is arranged on the gas delivery pipe; a venturi pipe is arranged in the main pipe body and near the reducing section, and the venturi pipe is directly installed in the main pipe body.

[0009] Furthermore, a closing body is fixed below the main body and between the air inlets, and the closing body is fixed between the outer protective tube and the main body, so that the gas can only flow to the air inlets and then enter the main body.

[0010] Furthermore, the flow regulating assembly includes a cylinder provided on the gas delivery pipe, the cylinder is connected to the gas delivery pipe, one end of the cylinder is closed, and the other end is provided with a connecting cylinder, the connecting cylinder is provided with an internal thread, the internal thread is threadedly connected to an adjusting bolt, and a piston is provided at one end of the adjusting bolt located in the cylinder, and a gas through hole is provided on the piston, the gas through hole can be connected to the cylinder, and the piston can move left and right in the cylinder, the aperture of the gas through hole is smaller than the diameter of the gas delivery pipe, and a handle is fixed at one end of the adjusting bolt located outside the connecting cylinder.

[0011] Preferably, the diameter of the connecting cylinder is smaller than the diameter of the cylinder body.

[0012] Furthermore, the venturi tube includes an inlet section, a contraction section, a throat section and a diffusion section which are connected in sequence, the inlet section is connected to the liquid delivery pipeline, and the gas delivery pipe is connected to the inlet section.

[0013] Furthermore, a flange is provided on the main pipe body, and the flange may be a known movable flange, or may be directly welded to the main pipe body.

[0014] Compared with the prior art, the utility model has the following advantages: when liquid enters the Venturi tube in the main pipeline through the liquid delivery pipe, a certain negative pressure is formed through the contraction section, and at this time, gas also enters and enters the Venturi tube together to form a preliminary gas-liquid two-phase mixture, which enters the diffusion section to form a certain pressure jet and is then ejected. At this time, the gas-liquid mixture further breaks up the bubbles in the gas-liquid mixture by the shear force generated during the high-speed swirl, and further promotes the mixing of the gas-liquid two-phase under the original gas-liquid mixing condition; a flow regulating component is provided, and the gas flow rate can be adjusted according to the use requirements to change the amount of sprayed water mist, and the use is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a three-dimensional structural schematic diagram of a dual-fluid atomizing spray gun.

[0016] Figure 2 The utility model is a schematic diagram of the main structure of a dual-fluid atomizing spray gun.

[0017] Figure 3 The utility model is a schematic diagram of the side structure of an outer protective tube, a main tube body and an air inlet of a double-fluid atomizing spray gun.

[0018] As shown in the figure: 1. main body, 2. nozzle, 3. fluid delivery pipe, 4. outer protective pipe, 5. air inlet, 6. gas delivery pipe, 7. flow regulating assembly, 8. cylinder, 9. connecting cylinder, 10. internal thread, 11. adjusting bolt, 12. piston, 13. gas through hole, 14. handle, 15. inlet section, 16. contraction section, 17. throat section, 18. diffusion section, 19. flange, 20. closing body. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Combined with Figure 1 , a dual-fluid atomizing spray gun, comprising a main body 1 and a nozzle 2 located at one end of the main body 1, the structure of which is known in the art and will not be described here;

[0021] Combined with Figure 1 , Figure 2 The end of the main body 1 away from the nozzle 2 is connected with a fluid delivery pipe 3, the diameter of the fluid delivery pipe 3 is smaller than the diameter of the main body 1, the fluid delivery pipe 3 extends into the main body 1, and there is a gap between the end located in the main body 1 and the outer side of the main body 1, and the end located in the main body 1 is provided with a reducing section 2, and the inner diameter of the reducing section 2 gradually decreases along the liquid flow direction of the main body;

[0022] Combined with Figure 3 An outer protective tube 4 is sleeved on the main body 1 and located on the outer periphery of the fluid delivery tube 3. Furthermore, a gap is provided between the inner surface of the outer protective tube 4 and the outer surface of the main body 1, and the gap serves as a channel for gas flow;

[0023] Air inlets 5 are provided on both sides of the main body 1 and inside the outer protective tube 4. The gas in the gas delivery pipe flows through the outer protective tube and the main body and finally enters the main body from the air inlets on both sides, where it is dispersed and enters, thus promoting a better fusion of gas and liquid.

[0024] A gas delivery pipe 6 is provided at the upper end of the outer protective pipe 4 , and a flow regulating component 7 is provided on the gas delivery pipe 6 ; a venturi pipe 7 is provided in the main pipe body 1 and close to the reducing section 2 , and the venturi pipe 7 is directly installed in the main pipe body 1 .

[0025] Furthermore, a closing body 20 is fixed below the main body 1 and between the air inlets 5 . The closing body 20 is fixed between the outer protective tube 4 and the main body 1 , so that the gas can only flow to the air inlets 5 and then enter the main body 1 .

[0026] Furthermore, the flow regulating assembly 7 includes a cylinder 8 provided on the gas delivery pipe 6, the cylinder 8 is connected to the gas delivery pipe 6, one end of the cylinder 8 is closed, and the other end is provided with a connecting cylinder 9, the connecting cylinder 9 is provided with an internal thread 10, and the internal thread 10 is threadedly connected with an adjusting bolt 11, and the adjusting bolt 11 is provided with a piston 12 at one end located in the cylinder 8, and a gas through hole 13 is provided on the piston 12, and the gas through hole 13 can be connected to the cylinder 8, and the piston 12 can move left and right in the cylinder 8. The aperture of the gas through hole 13 is smaller than the diameter of the gas delivery pipe 6, and a handle 14 is fixed to the end of the adjusting bolt 11 located outside the connecting cylinder 9, and the setting of the internal thread is that when the piston is screwed to the other end of the cylinder, the gas through hole is opposite to the gas delivery pipe, that is, the closed end of the cylinder and the pipe surface of the gas delivery pipe are located on the same vertical plane.

[0027] Preferably, the diameter of the connecting tube 9 is smaller than the diameter of the cylinder body 8 .

[0028] Furthermore, the venturi tube 7 includes an inlet section 15 , a contraction section 16 , a throat section 17 and a diffusion section 18 which are connected in sequence. The inlet section 15 is connected to the liquid delivery pipe 3 , and the gas delivery pipe 6 is connected to the inlet section 15 .

[0029] Furthermore, a flange 19 is provided on the main pipe body 1 . The flange 19 may be a known movable flange or may be directly welded to the main pipe body 1 .

[0030] During the specific implementation of the utility model, the fluid delivery pipe is connected with the liquid delivery component, and the gas delivery pipe is connected with the gas delivery component; when the liquid enters the venturi tube in the main pipeline through the liquid delivery pipe, a certain negative pressure is formed through the contraction section, and the gas also enters at this time, and also enters the venturi tube together, forming a preliminary gas-liquid two-phase mixture, and enters the diffusion section to form a certain pressure jet and is ejected. At this time, the gas-liquid mixture further breaks the bubbles in the gas-liquid mixture by the shear force generated during the high-speed swirl, and further promotes the mixing of the gas-liquid two-phase under the original gas-liquid mixing condition; a flow regulating component is provided, and the gas flow can be adjusted according to the use requirements, and the handle is rotated to drive the piston to move in the cylinder body. When it moves to the gas delivery pipe, the gas through hole is aligned with the gas delivery pipe. Since the aperture of the gas through hole is smaller than the gas delivery pipe, the gas flow is reduced, and the gas entering the main body becomes less, which indirectly changes the amount of sprayed water mist, and the use is more flexible.

[0031] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A dual-fluid atomizing spray gun, comprising a main body and a nozzle located at one end of the main body, characterized in that: A fluid delivery pipe is provided at one end of the main body away from the nozzle, the diameter of the fluid delivery pipe is smaller than that of the main body, the fluid delivery pipe extends into the main body, and a reducing section is provided at one end located within the main body, the inner diameter of the reducing section gradually decreases along the flow direction of the liquid; an outer protective pipe is provided on the main body and located at the outer periphery of the fluid delivery pipe, and air inlets are provided on both sides of the main body and located within the outer protective pipe; a gas delivery pipe is provided at the upper end of the outer protective pipe, and a flow regulating component is provided on the gas delivery pipe; a Venturi pipe is provided inside the main body and close to the reducing section.

2. A dual-fluid atomizing spray gun according to claim 1, characterized in that: A closing body is provided below the main pipe and between the air inlets. The closing body is fixed between the outer protective pipe and the main pipe.

3. A dual-fluid atomizing spray gun according to claim 1, characterized in that: The flow regulating assembly includes a cylinder provided on the gas delivery pipe, one end of the cylinder is closed, and the other end is provided with a connecting cylinder, the connecting cylinder is provided with an internal thread, the internal thread is threadedly connected to an adjusting bolt, one end of the adjusting bolt located in the cylinder is provided with a piston, and the piston is provided with a gas through hole, the aperture of the gas through hole is smaller than the diameter of the gas delivery pipe, and a handle is fixed to the end of the adjusting bolt located outside the connecting cylinder.

4. A dual-fluid atomizing spray gun according to claim 3, characterized in that: The diameter of the connecting cylinder is smaller than the diameter of the cylinder body.

5. A dual-fluid atomizing spray gun according to claim 1, characterized in that: The venturi tube comprises an inlet section, a contraction section, a throat section and a diffusion section which are connected in sequence. The inlet section is connected to a liquid delivery pipeline, and the gas delivery pipeline is connected to the inlet section.

6. A dual-fluid atomizing spray gun according to claim 1, characterized in that: The main pipe is also provided with a flange.

7. A dual-fluid atomizing spray gun according to claim 1, characterized in that: A gap is provided between the inner surface of the outer protective tube and the outer surface of the main tube.

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