Automatic spraying gun for inner coating of small-caliber double-cone slender equipment

Abstract

The invention discloses a small-caliber double-cone slender equipment inner coating automatic spraying spray gun which comprises a spray gun head, a spraying pipeline and valves, three nozzles in different directions are installed outside the spray gun head, the interior of the spray gun head is connected with a coating pipeline and an auxiliary atomization air pipeline which are independently connected with each nozzle, and each pipeline is provided with a control valve. Therefore, each nozzle can be independently controlled. By changing the position of the spray gun and independently controlling feeding of the spray nozzle, the requirement for automatically spraying the coating in the small-caliber double-cone slender equipment with the inner diameter being 50 mm or above can be met, the coating spraying quality and efficiency are improved, and the application prospect is wide.

Description

Technical Field

[0001] The invention relates to a small spray gun, in particular to a small-caliber double-cone slender equipment inner coating automatic spray gun. Background Art

[0002] With the development of technology, more and more equipment in various fields is moving towards miniaturization, with the minimum diameter reaching 50mm, such as tubular reactors, tubular heat exchangers, small-diameter solid engines, etc. The inside of the equipment needs to be coated with a layer of coating to ensure the performance and quality of the equipment. Therefore, there is a large demand for automatic spraying equipment for the internal coating of small-diameter double-cone slender equipment.

[0003] Patent No. CN 220610867 U discloses a spray gun head and a small-caliber spray gun for spraying the inner surface of a small-caliber container. The first channel of the spray gun for conveying the spraying liquid is connected to three nozzles in different directions, which can coat the inner tank of a water heater with an inner diameter range of 30 to 50 mm. Since the spray gun head is only equipped with one middle nozzle, it is not suitable for spraying the inner coating of a small-caliber device with a long length. Patent No. CN 220143734 U discloses a spray gun head and a spray gun, which meet the requirements of spraying the inner tank of a small-caliber container with a diameter of less than 50 mm. The spray gun can be provided with multiple middle discharge holes, which can be used for coating the inner coating of a small-caliber device with a long length. However, setting too many middle discharge holes will cause the outlet pressure of different discharge holes to deviate, reduce the uniformity of the coating and the spraying quality, and the spray gun is bulky. Therefore, it is urgent to develop an automatic spraying equipment that meets the requirements of spraying the inner coating of small-caliber double-cone slender equipment with an inner diameter of more than 50 mm. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a spray gun for automatic spraying of inner coating of small-caliber double-cone slender equipment. By changing the position of the spray gun and individually controlling the nozzle feeding, the automatic spraying requirements of the inner coating of the front cone, straight section and rear cone of small-caliber double-cone slender equipment with an inner diameter of more than 50 mm can be achieved, thereby improving the coating spraying quality and efficiency.

[0005] The technical solution of the present invention:

[0006] A small-caliber double-cone slender equipment internal coating automatic spray gun, characterized in that it includes a spray gun head body, a nozzle, a spray pipeline and a valve, the nozzle includes a front nozzle, a middle nozzle and a rear nozzle, which are installed in the front, middle and rear parts of the spray gun head body in sequence, a front paint port is arranged at the center of the front nozzle, front auxiliary atomizing air holes are symmetrically arranged on both sides of the front paint port, a middle paint port is arranged at the center of the middle nozzle, middle auxiliary atomizing air holes are symmetrically arranged on both sides of the middle paint port, a rear paint port is arranged at the center of the rear nozzle, and rear auxiliary atomizing air holes are symmetrically arranged on both sides of the rear paint port; the spray The pipeline includes a front-end spray pipeline, a middle spray pipeline, a rear-end spray pipeline, and a spray main pipeline. The front-end spray pipeline includes a front-end nozzle paint pipeline and a front-end nozzle auxiliary atomization air pipeline. The middle spray pipeline includes a middle nozzle paint pipeline and a middle nozzle auxiliary atomization air pipeline. The rear-end spray pipeline includes a rear-end nozzle paint pipeline and a rear-end nozzle auxiliary atomization air pipeline. The spray main pipeline includes a paint main pipeline and an auxiliary atomization air main pipeline. The front-end nozzle paint pipeline is connected to the front-end paint port, the front-end nozzle auxiliary atomization air pipeline is connected to the front-end auxiliary atomization air hole, and the middle nozzle paint pipeline is connected to the The middle paint port is connected, the middle nozzle auxiliary atomization air pipeline is connected to the middle auxiliary atomization air hole, the rear end nozzle paint pipeline is connected to the rear end paint port, and the rear end nozzle auxiliary atomization air pipeline is connected to the rear end auxiliary atomization air hole; the valve includes a front end valve, a middle valve, and a rear end valve, the front end valve includes a front end nozzle paint valve and a front end nozzle auxiliary atomization air valve, the middle valve includes a middle nozzle paint valve and a middle nozzle auxiliary atomization air valve, the rear end valve includes a rear end nozzle paint valve and a rear end nozzle auxiliary atomization air valve, and the front end nozzle paint valve is installed on the front end nozzle The paint pipeline is close to the side of the paint main pipeline, the front nozzle auxiliary atomization air valve is installed on the side of the front nozzle auxiliary atomization air pipeline close to the auxiliary atomization air main pipeline, the middle nozzle paint valve is installed on the side of the middle nozzle paint pipeline close to the paint main pipeline, the middle nozzle auxiliary atomization air valve is installed on the side of the middle nozzle auxiliary atomization air pipeline close to the auxiliary atomization air main pipeline, the rear nozzle paint valve is installed on the side of the rear nozzle paint pipeline close to the paint main pipeline, and the rear nozzle auxiliary atomization air valve is installed on the side of the rear nozzle auxiliary atomization air pipeline close to the auxiliary atomization air main pipeline.

[0007] Preferably, the front end nozzle, the middle nozzle and the rear end nozzle are connected to the spray gun head body by means of threads; the angle between the front end nozzle and the middle nozzle is α, 15°≤α≤75°, the angle between the middle nozzle and the rear end nozzle is β, 15°≤β≤75°, and the angle between the middle nozzle and the axis of the spray gun head body is γ, γ is 90°.

[0008] Preferably, the front-end nozzle paint pipeline and the front-end nozzle auxiliary atomizing air pipeline are coaxially installed near one side of the spray gun head body, and the front-end nozzle paint pipeline is located inside, the middle nozzle paint pipeline and the middle nozzle auxiliary atomizing air pipeline are coaxially installed near one side of the spray gun head body, and the middle nozzle paint pipeline is located inside, the rear-end nozzle paint pipeline and the rear-end nozzle auxiliary atomizing air pipeline are coaxially installed near one side of the spray gun head body, and the rear-end nozzle paint pipeline is located inside, and the length of the spray pipeline is greater than the length of the small-caliber double-cone slender device.

[0009] Preferably, the small-caliber double-cone slender equipment inner coating automatic spray gun has a spraying operating pressure of 7 to 12 MPa, an operating temperature of 30 to 60°C, an optimal operating pressure of 7.5 to 8 MPa, and an operating temperature of 35 to 40°C; the auxiliary atomizing air operating pressure is 0.3 to 0.4 MPa; and the inner diameter of the inner coating automatic spray equipment is ≥50 mm.

[0010] The advantages of the present invention are:

[0011] 1. The spray gun head carries three nozzles, which are compact in structure and small in size, reducing the size of the spray gun. Each nozzle is an independent feeding system, each nozzle is connected to a paint pipeline and an auxiliary atomizing air pipeline, and a control valve is installed on each pipeline to achieve separate control and feeding of each nozzle.

[0012] 2. By changing the spray gun position and individually controlling the nozzle feeding, the automatic spraying of the coating inside the front cone, straight section and rear cone of small-diameter double-cone slender equipment with an inner diameter of more than 50mm can be achieved, thereby improving the coating spraying quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the automatic spray gun for inner coating of a small-caliber double-cone slender device provided by the present invention.

[0014] Figure 2 It is a structural schematic diagram of a spray gun head of an automatic spray gun for spraying inner coating of a small-caliber double-cone slender device according to the present invention.

[0015] Figure 3 yes Figure 1 Nozzle position distribution diagram.

[0016] In the figure, 1, spray gun head body; 2, nozzle; 2-1, front nozzle; 2-1-1, front paint port; 2-1-2, front auxiliary atomizing air hole; 2-2, middle nozzle; 2-2-1, middle paint port; 2-2-2, middle auxiliary atomizing air hole; 2-3, rear nozzle; 2-3-1, rear paint port; 2-3-2, rear auxiliary atomizing air hole; 3, spray pipeline; 3-1, front paint pipeline; 3-1-1, front nozzle paint pipeline; 3-1-2, front nozzle auxiliary atomizing air pipeline; 3-2, middle spray pipeline; 3-2-1, middle nozzle paint pipeline; 3-2-2, middle nozzle auxiliary atomizing air pipeline; 3-3, rear spray pipeline; 3-3-1, rear nozzle paint pipeline; 3-3-2 rear-end nozzle auxiliary atomizing air pipeline; 3-4, spraying main pipeline; 3-4-1, paint main pipeline; 3-4-2, auxiliary atomizing air main pipeline; 4, valve; 4-1, front-end valve; 4-1-1, front-end nozzle paint valve; 4-1-2, front-end nozzle auxiliary atomizing air valve; 4-2, middle valve; 4-2-1, middle nozzle paint valve; 4-2-2, middle nozzle auxiliary atomizing air valve; 4-3 rear-end valve; 4-3-1, rear-end nozzle paint valve; 4-3-2, rear-end nozzle auxiliary atomizing air valve; α is the angle between the front-end nozzle 2-1 and the middle nozzle 2-2; β is the angle between the middle nozzle 2-2 and the rear-end nozzle 2-3: γ is the angle between the middle nozzle and the axis of the spray gun head. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through implementation modes. The following implementation modes are intended to explain the present invention but the present invention is not limited to the following implementation modes.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "including" or "comprising" and the like used in the present invention mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Front", "middle", "back", "upper", "lower", "inside", "coaxial", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 3As shown, before formal spraying, the front nozzle paint valve 4-1-1, the middle nozzle paint valve 4-2-1 and the rear nozzle paint valve 4-3-1 are opened at the same time. After paint is sprayed out from the nozzle 2, it indicates that the air in the front nozzle paint pipeline 3-1-1, the middle nozzle paint pipeline 3-2-1 and the rear nozzle paint pipeline 3-3-1 is eliminated, and all valves 4 are closed to eliminate the influence of the lag caused by the exhaust of air.

[0020] Furthermore, the spray gun head body 1 enters the interior of the small-diameter equipment from the rear cone, moves to an appropriate position at a distance from the front cone through the straight tube section and then stops moving, and at the same time, the front nozzle paint valve 4-1-1 and the front nozzle auxiliary atomizing air valve 4-1-2 are opened, and the paint and auxiliary atomizing air are respectively transmitted to the front nozzle 2-1 through the front nozzle paint pipeline 3-1-1 and the front nozzle auxiliary atomizing air pipeline 3-1-2, and the spray gun head body 1 moves toward the rear cone of the equipment, and the front nozzle 2-1 sprays the inner surface of the front cone of the equipment.

[0021] Furthermore, after the coating inside the front cone of the equipment is completed, the middle nozzle paint valve 4-2-1 and the middle nozzle auxiliary atomizing air valve 4-2-2 are opened at the same time, and the paint and auxiliary atomizing air are transmitted to the middle nozzle 2-2 through the middle nozzle paint pipeline 3-2-1 and the middle nozzle auxiliary atomizing air pipeline 3-2-2 respectively, and the middle nozzle 2-2 sprays the inner surface of the straight cylinder section of the equipment, and then the front nozzle paint valve 4-1-1 and the front nozzle auxiliary atomizing air valve 4-1-2 are closed at the same time to stop the front nozzle 2-1 from working, and the spray gun head body 1 keeps moving toward the rear cone of the equipment.

[0022] Furthermore, after the coating of the inner tube section of the equipment is completed, the rear end nozzle paint valve 4-3-1 and the rear end nozzle auxiliary atomizing air valve 4-3-2 are opened at the same time, and the paint and auxiliary atomizing air are transmitted to the rear end nozzle 2-3 through the rear end nozzle paint pipeline 3-3-1 and the rear end nozzle auxiliary atomizing air pipeline 3-3-2 respectively, and the rear end nozzle 2-3 starts to spray the inner surface of the rear cone of the equipment, and then the middle nozzle paint valve 4-2-1 and the middle nozzle auxiliary atomizing air valve 4-2-2 are closed at the same time to stop the middle nozzle 2-2 from working, and the spray gun head body 1 is moved to an appropriate position away from the rear cone of the equipment, and the spray gun head body 1 stops moving.

[0023] Furthermore, after the coating inside the rear cone of the equipment is completed, the rear end nozzle paint valve 4-3-1 and the rear end nozzle auxiliary atomizing air valve 4-3-2 are closed to stop the rear end nozzle 2-3 from working, and at the same time, the spray gun head body 1 moves toward the rear cone of the equipment until the spray gun head body 1 passes through the rear cone and moves out of the equipment.

[0024] The spray gun head designed in the present invention carries three nozzles, has a compact structure and a small size, each nozzle is connected to a paint pipeline and an auxiliary atomizing air pipeline, and a control valve is installed on each pipeline. By changing the position of the spray gun and individually controlling the nozzle supply, the automatic spraying requirements of the coating inside the front cone, straight barrel section and rear cone of small-caliber double-cone slender equipment with an inner diameter of more than 50 mm can be met, thereby improving the coating spraying quality and efficiency.

[0025] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred implementation modes, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A small-caliber double-cone slender equipment internal coating automatic spray gun, characterized by: The invention comprises a spray gun head body (1), a nozzle (2), a spray pipeline (3) and a valve (4), wherein the nozzle (2) comprises a front nozzle (2-1), a middle nozzle (2-2) and a rear nozzle (2-3), which are sequentially installed at the front, middle and rear parts of the spray gun head body (1), a front coating port (2-1-1) is arranged at the center of the front nozzle (2-1), front auxiliary atomizing air holes (2-1-2) are symmetrically arranged on both sides of the front coating port (2-1-1), a middle coating port (2-2-1) is arranged at the center of the middle nozzle (2-2), and a middle coating port (2-2-3) is arranged at the center of the middle nozzle (2-2). The spraying pipeline (3) comprises a front-end spraying pipeline (3-1), a middle spraying pipeline (3-2), a rear-end spraying pipeline (3-3), and a main spraying pipeline (3-4). The front-end spraying pipeline (3-1) comprises a front-end nozzle paint pipeline (3-1-1) and a front-end nozzle paint pipeline (3-1-2). The auxiliary atomizing air pipeline (3-1-2), the middle spraying pipeline (3-2) includes the middle nozzle paint pipeline (3-2-1) and the middle nozzle auxiliary atomizing air pipeline (3-2-2), the rear end spraying pipeline (3-3) includes the rear end nozzle paint pipeline (3-3-1) and the rear end nozzle auxiliary atomizing air pipeline (3-3-2), the spraying main pipeline (3-4) includes the paint main pipeline (3-4-1) and the auxiliary atomizing air main pipeline (3-4-2), the front end nozzle paint pipeline (3-1-1) and the front end paint port (2-1-1 ), the front nozzle auxiliary atomization air pipeline (3-1-2) is connected to the front auxiliary atomization air hole (2-1-2), the middle nozzle paint pipeline (3-2-1) is connected to the middle paint port (2-2-1), the middle nozzle auxiliary atomization air pipeline (3-2-2) is connected to the middle auxiliary atomization air hole (2-2-2), the rear nozzle paint pipeline (3-3-1) is connected to the rear paint port (2-3-1), and the rear nozzle auxiliary atomization air pipeline (3-3-2) is connected to the rear auxiliary atomization air hole (2-3-2);The valve (4) comprises a front-end valve (4-1), an intermediate valve (4-2), and a rear-end valve (4-3); the front-end valve (4-1) comprises a front-end nozzle paint valve (4-1-1) and a front-end nozzle auxiliary atomizing air valve (4-1-2); the intermediate valve (4-2) comprises an intermediate nozzle paint valve (4-2-1) and an intermediate nozzle auxiliary atomizing air valve (4-2-2); the rear-end valve (4-3) comprises a rear-end nozzle paint valve (4-3-1) and a rear-end nozzle auxiliary atomizing air valve (4-3-2); the front-end nozzle paint valve (4-1-1) is installed on the side of the front-end nozzle paint pipeline (3-1-1) close to the paint main pipeline (3-4-1); the front-end nozzle auxiliary atomizing air valve (4-1-2) is installed on the front-end nozzle auxiliary The atomizing air pipeline (3-1-2) is close to the auxiliary atomizing air main pipeline (3-4-2), the middle nozzle paint valve (4-2-1) is installed on the middle nozzle paint pipeline (3-2-1) close to the paint main pipeline (3-4-1), the middle nozzle auxiliary atomizing air valve (4-2-2) is installed on the middle nozzle auxiliary atomizing air pipeline (3-2-2) close to the auxiliary atomizing air main pipeline (3.4-2), the rear nozzle paint valve (4-3-1) is installed on the rear nozzle paint pipeline (3-3-1) close to the paint main pipeline (3-4-1), and the rear nozzle auxiliary atomizing air valve (4-3-2) is installed on the rear nozzle auxiliary atomizing air pipeline (3-3-2) close to the auxiliary atomizing air main pipeline (3-4-2). ; 2. The nozzle (2) according to claim 1, characterized in that The front nozzle (2-1), the middle nozzle (2-2) and the rear nozzle (2-3) are connected to the spray gun head body (1) by means of threads: the angle between the front nozzle (2-1) and the middle nozzle (2-2) is ɑ, 15°≤ɑ≤75°, the angle between the middle nozzle (2-2) and the rear nozzle (2-3) is β, 15°≤β≤75°, and the angle between the middle nozzle (2-2) and the axis of the spray gun head body (1) is γ, which is 90°.

3. The spraying pipeline (3) according to claim 1, characterized in that: The front nozzle paint pipeline (3-1-1) and the front nozzle auxiliary atomizing air pipeline (3-1-2) are coaxially installed near one side of the spray gun head body (1), and the front nozzle paint pipeline (3-1-1) is located inside; the middle nozzle paint pipeline (3-2-1) and the middle nozzle auxiliary atomizing air pipeline (3-2-2) are coaxially installed near one side of the spray gun head body (1), and the middle nozzle paint pipeline (3-2-1) is located inside; the rear nozzle paint pipeline (3-3-1) and the rear nozzle auxiliary atomizing air pipeline (3-3-2) are coaxially installed near one side of the spray gun head body (1), and the rear nozzle paint pipeline (3-3-1) is located inside; the length of the spray pipeline (3) is greater than the length of the small-caliber double-cone slender device.

4. According to claim 1, a small-caliber double-cone slender equipment internal coating automatic spray gun is characterized in that: The spraying operating pressure is 7-12MPa, the operating temperature is 30-60℃, the optimal operating pressure is 7.5-8MPa, and the operating temperature is 35-40℃; the auxiliary atomizing air operating pressure is 0.3-0.4MPa; the inner diameter of the automatic spraying equipment for the inner coating is ≥50mm.

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