A uniform atomizing spray gun for insulator spraying

Abstract

The utility model relates to the technical field of spraying equipment discloses a kind of uniform atomization spray gun for insulator spraying, the spray gun includes gun body, nozzle and rotating assembly;Gas passage and coating passage are equipped in the gun body;The inside of the nozzle is provided with mixing chamber, the rotating assembly rotation is arranged in mixing chamber, and is driven rotation by gas from gas hole spray. When working, the rotating assembly of high-speed rotation, preferably turbine fan, the coating entering mixing chamber is forced mechanical shearing and centrifugal scattering. In addition, spray gun is also integrated with the adjusting assembly for adjusting total gas flow to control atomized particle size, and the control assembly for changing local airflow to restrict lacquer mist shape. The utility model is through active mechanical atomization, solve the core problem of uneven atomization of high-viscosity coating, poor coating quality of prior art, realize the effect that atomization particle is uniform, controllability is strong, coating utilization rate is high.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, and in particular to a uniform atomizing spray gun for spraying insulators. Background Technology

[0002] Spray guns, as a common surface coating tool, are widely used in fields such as machinery manufacturing, building decoration, and power equipment maintenance. In power systems, to improve the anti-flashover performance of insulators of transmission and transformation equipment, it is usually necessary to spray a layer of anti-flashover coating (such as RTV coating) onto their surface, and this process is generally carried out using spray guns.

[0003] Existing conventional pneumatic spray guns work primarily by using high-pressure airflow to impact and mix with the paint at the nozzle, relying on the impact and shearing force of the airflow to tear the paint into fine droplets. This passive atomization method can achieve good results when processing low-viscosity, ordinary paints.

[0004] However, anti-flashover coatings used for insulator spraying often have high viscosity. The airflow shear force of conventional spray guns is significantly reduced in effectiveness against such high-viscosity fluids. The airflow struggles to fully and evenly tear the viscous coating, resulting in coarse paint mist particles with extremely uneven size distribution. This directly affects the final coating quality, easily leading to defects such as sagging, orange peel texture, and uneven thickness. It also prevents the formation of a dense, smooth protective layer, thus impacting the insulator's hydrophobicity and long-term operational reliability. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a uniform atomizing spray gun for insulator coating, aiming to improve the problems of uneven atomization particles and poor coating quality in uniform atomizing spray guns used for insulator coating when atomizing high-viscosity coatings. This utility model aims to provide a uniform atomizing spray gun for insulator coating with an improved structure that can effectively solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a uniform atomizing spray gun for insulator coating, comprising a gun body, a nozzle, and a rotating assembly. The gun body has a gas channel and a coating channel inside, and a gas chamber communicating with the gas channel is provided inside the gun body. The nozzle is fixedly connected to the front end of the gun body and has a mixing chamber inside. The gun body has a baffle for separating the gas chamber and the mixing chamber, and the baffle has an air hole that allows the two to communicate. The rotating assembly is rotatably disposed in the mixing chamber, and the structure of the rotating assembly is directly opposite the air hole, so that it can be driven to rotate by the gas ejected from the air hole.

[0007] Preferably, the rotating assembly includes a base and a turbine fan rotatably connected to the base, the turbine fan being directly opposite the air vent.

[0008] Preferably, the spray gun further includes an adjustment assembly; the rear of the gun body has a threaded hole communicating with the gas passage; the adjustment assembly includes an adjustment head, a threaded rod fixedly connected to the adjustment head, and a plunger, the threaded rod being threaded into the threaded hole, and the plunger being slidably disposed in the gas passage and driven by the end of the threaded rod.

[0009] Preferably, the spray gun further includes a control assembly; the control assembly includes a control plate and a rotating ring; the control plate is rotatably disposed in the gun body and fits against the baffle to selectively block the air holes, and the control plate has a through hole; the rotating ring is rotatably sleeved on the outer wall of the gun body and threadedly connected to the gun body, and the rotating ring is used to drive the control plate to rotate.

[0010] Preferably, the control assembly further includes a fixing rod; a limiting hole for driving the fixing rod is provided on the rotating ring; one end of the fixing rod is slidably engaged with the limiting hole, and the other end is fixedly connected to the control plate; a guide hole is provided on the gun body for the fixing rod to slide therein.

[0011] Preferably, the gun body is provided with a paint cavity communicating with the paint channel, and the paint cavity is communicated with the mixing cavity through a paint hole; the gun body is also provided with a control rod for opening and closing the paint hole.

[0012] Preferably, the nozzle has an annular plate inside, and the circumferential sidewall of the nozzle has a plurality of ejection holes that communicate with the mixing chamber.

[0013] Preferably, the rotation of the control plate causes a change in the alignment between the through hole and the air hole.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by adding a turbine fan structure driven by airflow to the mixing chamber of the spray gun, the problem of poor coating quality caused by coarse particles and uneven distribution when the spray gun atomizes high-viscosity coatings is solved. The technical effect of actively and forcibly mechanically dispersing the coating is achieved, which significantly improves the uniformity and fineness of atomization.

[0015] 2. In this utility model, by setting an adjustment component with an adjustable main gas channel cross-sectional area, the problem that the spray gun in the prior art is difficult to adapt to coatings of different viscosities and cannot accurately control the paint mist particle size and spray volume is solved. It achieves stepless adjustment of the total air flow, thereby controlling the turbine fan speed and realizing precise control of paint mist particle size and spray volume, thus enhancing the technical effect of the spray gun's applicability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a uniform atomizing spray gun for insulator spraying proposed in this utility model. Figure 2 This is a schematic diagram of the gun body structure of a uniform atomizing spray gun for insulator spraying proposed in this utility model. Figure 3 for Figure 2 Enlarged diagram of point A in the diagram; Figure 4 This is a schematic diagram of the nozzle part of a uniform atomizing spray gun for insulator spraying proposed in this utility model. Figure 5 This is a schematic diagram of the rotating ring part of a uniform atomizing spray gun for insulator spraying proposed in this utility model.

[0017] Legend: 1. Gun body; 101. Gas passage; 102. Gas chamber; 103. Paint passage; 104. Paint chamber; 105. Baffle; 106. Control rod; 107. Paint hole; 108. Air hole; 2. Nozzle; 201. Mixing chamber; 202. Annular plate; 203. Spray hole; 3. Control assembly; 301. Control plate; 302. Through hole; 303. Guide hole; 304. Fixing rod; 305. Rotating ring; 306. Limiting hole; 4. Rotating assembly; 401. Base; 402. Turbine fan; 5. Adjusting assembly; 501. Threaded hole; 502. Threaded rod; 503. Adjusting head; 504. Plunger. Detailed Implementation

[0018] Please refer to Figures 1 to 5 This utility model provides a uniform atomizing spray gun for insulator spraying, which aims to solve the problems in the prior art where the spray gun atomizes high-viscosity coatings with uneven particle size and difficulty in accurately and independently adjusting the shape and flow rate of the paint mist.

[0019] like Figure 1 and Figure 2 As shown, the uniform atomizing spray gun for insulator spraying includes a gun body 1 and a nozzle 2 fixedly connected to the front end of the gun body 1. The gun body 1 serves as the main body for the entire spray gun and the carrier for the fluid channel. The gun body 1 has a gas channel 101 and a paint channel 103 inside. The gas channel 101 is used to transport compressed gas, and the paint channel 103 is used to transport paint. An air chamber 102 communicating with the gas channel 101 is also formed inside the gun body 1 to stabilize the air pressure. A mixing chamber 201 is formed inside the nozzle 2. The mixing chamber 201 is the core area for mixing and atomizing the gas and paint.

[0020] The basic structure of the mixture includes a baffle 105 on the gun body 1 for separating the gas chamber 102 and the mixing chamber 201. The baffle 105 has an air hole 108, which connects the gas chamber 102 and the mixing chamber 201 through the air hole 108. High-speed gas is injected into the mixing chamber 201 through the air hole 108.

[0021] The spray gun also includes a rotating component 4, which is rotatably disposed in the mixing chamber 201. The structure of the rotating component 4 is directly facing the air hole 108, so that the high-speed gas ejected from the air hole 108 can directly impact and drive the rotating component 4 to rotate at high speed, thereby mechanically dispersing the paint entering the mixing chamber 201 into uniform droplets.

[0022] Furthermore, the rotating assembly 4 includes a base 401 and a turbine fan 402 rotatably connected to the base 401. The turbine fan 402 has multiple blades and faces the air hole 108. The gas impacts the blades of the turbine fan 402, giving the rotating assembly 4 the power to rotate. The high-speed rotation of the turbine fan 402 can efficiently shear and centrifuge the coating.

[0023] The adjustment component 5 and the gun body 1 form a specific threaded transmission fit and connection relationship to adjust the total air flow into the gas channel 101, thereby changing the rotation speed of the turbine fan 402.

[0024] The adjustment assembly 5 includes an adjustment head 503, a threaded rod 502 fixedly connected to the adjustment head 503, and a plunger 504. The rear of the gun body 1 has a threaded hole 501 communicating with the gas channel 101. The threaded rod 502 is threaded into the threaded hole 501, and the plunger 504 is slidably disposed in the gas channel 101 and driven by the end of the threaded rod 502. When the adjustment head 503 is rotated, the adjustment head 503 drives the threaded rod 502 to move axially forward and backward in the threaded hole 501, thereby pushing the plunger 504 to slide axially synchronously in the gas channel 101. This threaded drive and plunger 504 sliding cooperation structure can steplessly adjust the effective flow cross-sectional area of ​​the gas channel 101 by changing the position of the plunger 504 in the gas channel 101, thereby precisely controlling the total amount of gas entering the gas chamber 102.

[0025] In addition, the spray gun also includes a control component 3, and the control component 3 and the gun body 1 form another transmission relationship to change the gas flow rate to adjust the shape of the sprayed paint mist.

[0026] The control assembly 3 includes a control plate 301 and a rotating ring 305. The control plate 301 is rotatably disposed inside the gun body 1 and fits against the baffle 105 that separates the air chamber 102 and the mixing chamber 201. The control plate 301 has a through hole 302. The rotation of the control plate 301 causes the alignment degree between the through hole 302 and the air hole 108 to change, thereby selectively blocking the air hole 108. The rotating ring 305 is rotatably sleeved on the outer wall of the gun body 1 and threadedly connected to the gun body 1. The rotating ring 305 is used to drive the control plate 301 to rotate. This structure can rotate the internal control plate 301 by rotating the external rotating ring 305, thereby changing the actual ventilation state of the air hole 108, thus affecting the shape of the ejected airflow, and finally achieving the purpose of constraining and adjusting the shape of the paint mist.

[0027] In a preferred embodiment, to achieve reliable transmission between the rotating ring 305 and the control plate 301, the control assembly 3 further includes a fixed rod 304; the rotating ring 305 has a limiting hole 306 for driving the fixed rod 304, one end of the fixed rod 304 is slidably engaged with the limiting hole 306, and the other end is fixedly connected to the control plate 301; at the same time, the gun body 1 has a guide hole 303 for the fixed rod 304 to slide in; when the rotating ring 305 is rotated, the rotating ring 305 generates axial displacement due to the threaded engagement, and the side wall of the limiting hole 306 pushes the fixed rod 304 to slide in the guide hole 303, and the sliding of the fixed rod 304 drives the control plate 301 to rotate around its axis.

[0028] In another preferred embodiment, in order to control the flow of paint, the gun body 1 is provided with a paint cavity 104 communicating with the paint channel 103. The paint cavity 104 is connected to the mixing cavity 201 through the paint hole 107. The gun body 1 is also provided with a control rod 106 for driving the baffle 105 to open and close the paint hole 107. The baffle 105 is slidably disposed in the gun body 1 and driven by the control rod 106, which can seal or open the paint hole 107, thereby precisely controlling the supply of paint.

[0029] In another preferred embodiment, in order to form a regular spray pattern, the nozzle 2 is provided with an annular plate 202 inside, and a plurality of spray holes 203 communicating with the mixing chamber 201 are opened on the circumferential sidewall of the nozzle 2; the annular plate 202 helps to guide the airflow and atomized coating, while the uniformly distributed spray holes 203 ensure that the atomized coating can be sprayed out uniformly in an annular or conical shape to meet the requirements of annular surface spraying of workpieces such as insulators.

[0030] Working principle: During spraying, compressed gas enters the air chamber 102 through the gas channel 101, while the paint enters the paint chamber 104 through the paint channel 103. When the control lever 106 is pushed, it drives the baffle 105 to move, opening the paint orifice 107, allowing the paint to flow into the mixing chamber 201. Simultaneously, high-pressure gas in the air chamber 102 is injected at high speed into the mixing chamber 201 through the air orifice 108. The gas directly impacts and drives the turbine fan 402 of the rotating assembly 4 located in the mixing chamber 201 to rotate at high speed. The high-speed rotating turbine fan 402, through the mechanical shearing and centrifugal force of its blades, forcibly and actively disperses the paint entering the mixing chamber 201 into fine and uniform droplets. Finally, the fully atomized paint particles, driven by the airflow, are guided by the annular plate 202 and uniformly sprayed out from the circumferential spray holes 203 of the nozzle 2. When it is necessary to adjust the size and spray volume of paint mist particles, the adjusting head 503 of the adjusting assembly 5 can be rotated. The adjusting head 503 drives the threaded rod 502 to move within the threaded hole 501, thereby pushing the plunger 504 to slide within the gas passage 101, changing the flow cross-sectional area of ​​the gas passage 101. If the cross-sectional area increases, the total air intake increases, the speed of the turbine fan 402 increases, the atomized particles become finer, and the spray volume increases; conversely, if the cross-sectional area decreases, the total air intake decreases, the speed of the turbine fan 402 decreases, the atomized particles become coarser, and the spray volume decreases. When it is necessary to adjust the spray pattern of the paint mist, the rotating ring 305 of the control component 3 can be rotated. The rotating ring 305 drives the control plate 301 to rotate through the transmission cooperation with the fixed rod 304 and the guide hole 303. The rotation of the control plate 301 changes the relative position and overlap area between the through hole 302 on it and the air hole 108 on the gun body 1, thereby adjusting the airflow pattern ejected from the air hole 108, and thus constraining and shaping the main paint mist ejected from the spray hole 203, achieving control over the width of the spray pattern.

Claims

1. A uniform atomizing spray gun for insulator coating, comprising: Gun body (1), the gun body (1) has a gas channel (101) and a paint channel (103) inside. The gun body (1) also has an air cavity (102) that communicates with the gas channel (101). Nozzle (2), the nozzle (2) is fixedly connected to the front end of the gun body (1), and a mixing chamber (201) is provided inside the nozzle (2). The gun body (1) is provided with a baffle (105) for separating the gas chamber (102) and the mixing chamber (201), and the baffle (105) is provided with an air hole (108) for connecting the gas chamber (102) and the mixing chamber (201). The gun body (1) is characterized by... The spray gun also includes a rotating assembly (4), which is rotatably disposed within the mixing chamber (201) and has a structure facing the air hole (108) to be driven to rotate by the gas ejected from the air hole (108).

2. The uniform atomizing spray gun for insulator coating according to claim 1, characterized in that, The rotating assembly (4) includes a base (401) and a turbine fan (402) rotatably connected to the base (401), the turbine fan (402) being directly opposite the air hole (108).

3. A uniform atomizing spray gun for insulator coating according to claim 1, characterized in that, The spray gun also includes an adjustment assembly (5); the rear of the gun body (1) is provided with a threaded hole (501) communicating with the gas channel (101); the adjustment assembly (5) includes an adjustment head (503), a threaded rod (502) fixedly connected to the adjustment head (503) and a plunger (504), the threaded rod (502) is threaded into the threaded hole (501), and the plunger (504) is slidably disposed in the gas channel (101) and driven by the end of the threaded rod (502).

4. A uniform atomizing spray gun for insulator coating according to claim 1, characterized in that, The spray gun also includes a control assembly (3); the control assembly (3) includes a control plate (301) and a rotating ring (305); the control plate (301) is rotatably disposed inside the gun body (1) and attached to the baffle (105) to selectively block the air hole (108), and the control plate (301) has a through hole (302); the rotating ring (305) is rotatably sleeved on the outer wall of the gun body (1) and threadedly connected to the gun body (1), and the rotating ring (305) is used to drive the control plate (301) to rotate.

5. A uniform atomizing spray gun for insulator coating according to claim 4, characterized in that, The control component (3) further includes a fixed rod (304); the rotating ring (305) is provided with a limiting hole (306) for driving the fixed rod (304); one end of the fixed rod (304) is slidably engaged with the limiting hole (306), and the other end is fixedly connected to the control plate (301); the gun body (1) is provided with a guide hole (303) for the fixed rod (304) to slide therein.

6. A uniform atomizing spray gun for insulator coating according to claim 1, characterized in that, The gun body (1) is provided with a paint cavity (104) that communicates with the paint channel (103). The paint cavity (104) is connected to the mixing cavity (201) through a paint hole (107). The gun body (1) is also provided with a control rod (106) for opening and closing the paint hole (107).

7. A uniform atomizing spray gun for insulator coating according to claim 1, characterized in that, The nozzle (2) has an annular plate (202) inside, and the nozzle (2) has a plurality of ejection holes (203) on its circumferential sidewall that communicate with the mixing chamber (201).

8. A uniform atomizing spray gun for insulator coating according to claim 4, characterized in that, The rotation of the control plate (301) causes a change in the alignment between the through hole (302) and the air hole (108).

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