Special nozzle for painting steel structure

Abstract

The utility model provides a special nozzle of steel structure touch -up paint, belong to nozzle technical field, this special nozzle of steel structure touch -up paint includes nozzle body and paint spraying widening mechanism, the left side inside nozzle body is installed with the spray head, the inside of spray head is provided with the spray cavity, the spray hole is established at the right side of nozzle body, the spray hole is elliptical and sets up, the air hole is established at the top and the bottom of the right side of nozzle body, the four corners of the right side of nozzle body all are provided with the air hole, can carry out directional guidance through setting up paint spraying widening mechanism to the paint mist of outside when the nozzle body works, make the paint thickness of paint spraying fan outside less than inside, promote paint spraying fan inside cover touch -up paint area, outside cover old paint surface, and then to the steel structure after touch -up paint surface and the original paint surface keep relative identity, avoid nozzle body etc. Thick spray, lead to the thickness of steel structure front and back paint surface difficultly consistent, make touch -up paint junction place protruding condition, therefore, improved the touch -up paint consistency and paint surface effect of nozzle body after.

Description

Technical Field

[0001] This utility model relates to the field of nozzle technology, and more specifically, to a special nozzle for repairing paint on steel structures. Background Technology

[0002] Steel structure painting is a key process in steel structure manufacturing and maintenance. Its purpose is to protect the steel structure from corrosion, extend its service life, and improve its appearance through coating. The nozzle is the core component of the painting system, often made of wear-resistant hard alloys such as tungsten carbide to withstand the long-term erosion of high-pressure paint. During operation, the nozzle works in conjunction with the spray gun, powered by a high-pressure pump that pressurizes the paint to 10-25 MPa. After being filtered by a pressure accumulator filter, the paint is delivered through a paint supply pipe to the extremely fine nozzle orifice. The paint is sprayed at high speed, violently colliding with the air and breaking into particles. This atomization continues until the velocity decreases, ultimately resulting in a uniform adhesion to the steel structure surface. After the steel structure is painted, the customer needs to modify the position of some parts. After the modification, the modified position needs to be repainted. The existing elliptical surface of the paint is uniform, ensuring that the thickness of the fan-shaped sprayed area is basically uniform. This is not a problem for spraying new components, but it has a greater impact on the spraying of repaired components. Generally, the paint is covered with three layers of paint: base, middle and top. When repairing components, the three layers of paint need to be applied to the repair edge to form an area of ​​unequal thickness. Since the nozzle sprays a uniform thickness, it will affect the consistency of the subsequent paint surface. Therefore, it is necessary to spray with unequal thickness.

[0003] In related technologies, during the use of nozzles, most nozzles adopt threaded connections. The threaded connection precisely engages the external thread of the nozzle with the internal thread of the spray gun nozzle seat, and with the help of a sealing gasket, it prevents paint leakage. It is suitable for use in scenarios requiring strong sealing, such as high-pressure airless spray guns.

[0004] However, during the current use of the nozzle, when the nozzle sprays through the same thickness, the paint surface in front of the steel structure will affect the thickness of the subsequent paint touch-up on the steel structure, which will result in an inconsistency between the thickness of the paint surface and the original paint surface. This is especially true for the case of protrusions at the joints, which affects the consistency of the subsequent paint touch-up and the paint surface effect. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a special nozzle for steel structure paint repair that overcomes or at least partially solves the above technical problems.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a special nozzle for steel structure paint repair, including a nozzle body, a spray head installed on the left side inside the nozzle body, and a spray chamber provided inside the spray head;

[0008] The paint spraying widening mechanism includes:

[0009] The nozzle orifice is located on the right side of the nozzle body and is elliptical in shape.

[0010] Air holes; the air holes are located at the top and bottom of the right side of the nozzle body, and air inlets are provided at the four corners of the right side of the nozzle body;

[0011] The air inlets are symmetrically distributed on both sides of the long axis of the spray nozzles, and are used to guide the airflow so that the paint thickness on the outer side of the spray fan is less than that on the inner side.

[0012] In a preferred embodiment, an air chamber is provided on the left side of the nozzle body, and the left sides of the air holes and air inlets are connected to the air chamber, with the nozzle head located inside the air chamber.

[0013] In a preferred embodiment, corner portions are fixedly connected to the top and bottom of the right side of the nozzle body, and airflow holes are provided on both sides of the inner side of the corner portions.

[0014] In a preferred embodiment, an airflow cavity is provided inside the corner, and the right side of the inner side of the airflow cavity is connected to the outer side of the airflow hole.

[0015] In a preferred embodiment, a through groove is provided on the left side of the nozzle body, and the right side of the through groove is connected to the left side of the airflow chamber.

[0016] In a preferred embodiment, a groove is provided on the right side of the outer side of the nozzle body, and the groove is located on the outer side of the corner.

[0017] In a preferred embodiment, there are four air holes, arranged in pairs, tilted towards the left and right edges of the spray painting fan surface.

[0018] In a preferred embodiment, the nozzle body is made of hard alloy material and has a corrosion-resistant coating on its surface.

[0019] The special nozzle for steel structure paint repair provided by this utility model has the following beneficial effects:

[0020] 1. By setting up a paint widening mechanism, the paint mist on the outer side of the nozzle body can be directionally guided when the nozzle body is working, so that the paint thickness on the outer side of the paint fan is less than that on the inner side. This causes the inner side of the paint fan to cover the touch-up area and the outer side to cover the old paint surface. As a result, the paint surface after the steel structure is touched up is relatively consistent with the original paint surface. This avoids the problem of uneven paint thickness on the front and back of the steel structure due to uniform spraying of the nozzle body, which can cause the paint joint to bulge. Therefore, it improves the consistency of the paint after the nozzle body is touched up and the paint surface effect.

[0021] 2. By setting up an air cavity, the air vents and air ports can be connected, and the air vents and air ports can be provided with space to work with external air sources. This avoids the situation where the air vents and air ports cannot work together and can not use external air sources, thus improving the consistency of the connection between the air vents and air ports.

[0022] 3. By setting corners and airflow holes, external compressed gas can be directionally ejected, causing the gas to compress the paint column ejected from the nozzle, forcing the paint column to atomize for spraying. This avoids the situation where the nozzle body is unable to effectively atomize the paint column during operation, thus improving the atomization effect of the nozzle body. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is an overall perspective view provided by an embodiment of the present utility model;

[0025] Figure 2 A right-side perspective three-dimensional structural diagram of the nozzle body provided for an embodiment of this utility model;

[0026] Figure 3 Provided for the embodiments of this utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 Provided for the embodiments of this utility model Figure 2 Enlarged structural diagram at point B;

[0028] In the diagram: 1. Nozzle body; 2. Nozzle head; 3. Spray chamber; 4. Spray hole; 5. Air hole; 6. Air inlet; 7. Air chamber; 8. Corner; 9. Air flow hole; 10. Air flow chamber; 11. Through groove; 12. Raised groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] Reference Figures 1-4 This utility model provides a technical solution: a special nozzle for steel structure touch-up painting, including a nozzle body 1 and a paint spraying widening mechanism. A nozzle head 2 is installed on the left side inside the nozzle body 1. The nozzle head 2 has a spraying chamber 3 inside, which can guide the paint mist on the outside of the nozzle body 1 when it is working, so that the paint thickness on the outside of the spraying fan is less than that on the inside. This causes the inside of the spraying fan to cover the touch-up area and the outside to cover the old paint surface, so that the paint surface after the steel structure is touched up is relatively consistent with the original paint surface. This avoids the problem of uneven paint thickness on the front and back of the steel structure due to uniform spraying of the nozzle body 1, which can cause the paint joint to bulge. Therefore, it improves the consistency of the paint touch-up and the paint surface effect of the nozzle body 1.

[0031] Reference Figures 1-4 In a preferred embodiment, the paint spraying widening mechanism includes a spray hole 4, which is located on the right side of the nozzle body 1 and is elliptical in shape. Air holes 5 are located at the top and bottom of the right side of the nozzle body 1. Air inlets 6 are symmetrically distributed on both sides of the long axis of the spray hole 4, used to guide the airflow so that the paint thickness on the outer side of the sprayed surface is less than that on the inner side. The change from a circular to an elliptical shape of the spray hole 4 ensures a wider sprayed surface. The elliptical spray hole 4 exerts a bidirectional squeezing effect on the liquid flow, widening the paint atomization width and reducing the diameter of the paint mist particles. Simultaneously, the air inlets 6 create high-pressure air at the outer edge of the paint atomization cloud. The curtain barrier forces the paint particles on the outer side to move towards the center area, reducing the amount of paint deposited per unit area in that area. This allows the nozzle body 1 to achieve paint touch-up, with a thicker center and thinner edges, ensuring consistency at the paint joints of the steel structure. An air chamber 7 is provided on the left side of the nozzle body 1, and the left sides of the air holes 5 and air inlets 6 are connected to the air chamber 7. The nozzle 2 is located inside the air chamber 7, which can connect the air holes 5 and air inlets 6 and provide space for the air holes 6 and air holes 5 to work with the external air source. This avoids the situation where the air holes 6 and air holes 5 cannot work with the external air source, thus improving the consistency of the communication between the air holes 6 and air holes 5.

[0032] Reference Figures 1-2In a preferred embodiment, corner portions 8 are fixedly connected to the top and bottom of the right side of the nozzle body 1. Airflow holes 9 are provided on both sides of the inner side of the corner portions 8, which can directionally spray external compressed gas, so that the gas compresses the paint column sprayed from the nozzle hole 4, forcing the paint column to atomize for spraying. This avoids the situation where the nozzle body 1 is difficult to effectively atomize the paint column when it is working, thus improving the atomization effect of the nozzle body 1. An airflow cavity 10 is provided inside the corner portion 8. The right side of the inner side of the airflow cavity 10 is connected to the outer side of the airflow hole 9, which can connect the airflow holes 9 and prepare for the subsequent gas to be guided to the airflow holes 9. This avoids the situation where the airflow holes 9 are difficult to connect and output airflow when they are working, thus improving the connection effect between the airflow holes 9.

[0033] Reference Figures 1-2 In a preferred embodiment, a through groove 11 is provided on the left side of the nozzle body 1, and the right side of the through groove 11 is connected to the left side of the airflow cavity 10. This provides space for the airflow cavity 10 and the airflow hole 9 to communicate with the outside gas, preventing the outside gas from having difficulty entering the airflow cavity 10 and causing the airflow hole 9 to malfunction. Therefore, the effect of communicating between the airflow cavity 10 and the airflow hole 9 and the outside gas is improved. A protrusion 12 is provided on the right side of the outer side of the nozzle body 1. The protrusion 12 is located on the outer side of the corner 8. This provides a snap-fit ​​space for the user to install and connect the nozzle body 1 with the external gun body through the external mounting ring. This prevents the nozzle body 1 from being difficult to install and connect during operation, thus improving the ease of installation and connection and the force-bearing effect of the nozzle body 1.

[0034] Reference Figures 1-2 In a preferred embodiment, by having four air holes 5 arranged in pairs, each tilted towards the left and right edges of the spray fan, a high-pressure air curtain barrier can be formed on the left and right sides of the spray hole 4. This reduces the amount of paint deposited in the edge area, eliminates abrupt changes in paint thickness in the touch-up area, and guides the airflow to diffuse along the direction of the old paint surface, forming a gentle thickness slope at the junction, thus achieving the bonding of the new and old paint layers. This improves the paint touch-up effect of the nozzle body 1. The main body of the nozzle body 1 is made of hard alloy material and has a corrosion-resistant coating on its surface, which can ensure the overall strength and service life of the nozzle 2. Hard alloy has extremely high hardness and wear resistance, which can effectively resist the wear caused by long-term high-speed scouring of high-pressure paint, greatly extend the service life of the nozzle body 1, and reduce the downtime and cost of frequently replacing the nozzle body 1. Meanwhile, its excellent structural stability ensures that the nozzle size and shape remain accurate over a long period of time, avoiding problems such as spray pattern distortion and unstable paint flow caused by material deformation. It also ensures the uniformity and consistency of paint distribution in the transition area during steel structure repair painting, improving the stability of repair painting quality. Furthermore, the polytetrafluoroethylene coating can ensure the surface corrosion resistance of the nozzle body 1 during operation, thus improving the working stability and service life of the nozzle body 1.

[0035] Specifically, the working process or principle of this special nozzle for steel structure paint repair is as follows: During use, after the nozzle body 1 is connected to the external spray gun via the external mounting ring, the groove 12 provides a space medium for the mounting ring to apply force between the nozzle body 1 and the spray gun. During this process, the nozzle head 2 drives the paint through the spray hole 4, passing through the nozzle body 1, preparing for subsequent paint spraying. At this time, the through groove 11, in conjunction with the airflow chamber 10, connects the airflow hole 9 to the air outlet of the spray gun. Simultaneously, the air chamber 7 connects the air port 6 and the air hole 5 to the air outlet of the spray gun, preparing for the subsequent pneumatic compression and guidance of the paint by the nozzle body 1. When the external spray gun operates, the paint enters the spray gun and exits the nozzle body 1 through the spray hole 4. Due to the fine adjustment of the spray hole 4, changing from a circle to an ellipse, the width of the sprayed paint fan is increased, flattening the paint into an elliptical column. At this time, compressed air impacts the paint flowing out of the spray chamber 3 through the spray hole 4, forming a basic atomized cloud. At this point, the elliptical... The nozzle 4 exerts a bidirectional squeezing effect on the liquid flow. In the long axis direction, the nozzle 4 reduces airflow resistance and expands the width of the atomized cloud. In the short axis direction, the nozzle 4 enhances air shear force, thereby reducing the diameter of paint mist particles and atomizing the paint column. During this process, air from the air chamber 7 enters the airflow chamber 10 through the through groove 11 and is guided out of the corner 8 through the airflow hole 9, assisting the nozzle 4 in atomizing the paint column. At the same time, the high pressure near the air port 6 (close to the nozzle 4) ejects a high-speed airflow, forming a high-pressure air curtain barrier at the outer edge of the paint atomized cloud. This forces the outer paint particles to move towards the center, reducing the amount of paint deposited per unit area in that area. The low pressure far from the nozzle 6 (away from the nozzle 2) maintains the stability of the middle section of the atomized cloud with a gentle airflow, preventing the high-pressure airflow from causing paint film breakage. This allows the nozzle body 1 to achieve a continuous gradient distribution with a thicker center and thinner edges, thus enabling better connection between the steel structure touch-up paint area and the original paint surface, ensuring consistency between the touch-up paint and the transition area between the old and new paint.

Claims

1. Steel structure special nozzle for painting, comprising nozzle body (1), the left side of the inside of the nozzle body (1) is provided with spray head (2), the inside of the spray head (2) is provided with spray cavity (3), characterized in that ； The paint spraying widening mechanism includes: The nozzle (4) is located on the right side of the nozzle body (1) and is elliptical in shape. Air holes (5); the air holes (5) are opened at the top and bottom of the right side of the nozzle body (1), and air ports (6) are opened at the four corners of the right side of the nozzle body (1); The air inlets (6) are symmetrically distributed on both sides of the long axis of the spray holes (4) to guide the airflow in a directional manner so that the paint thickness on the outer side of the spray fan is less than that on the inner side.

2. The special nozzle for steel structure paint repair according to claim 1, characterized in that, An air chamber (7) is provided on the left side of the nozzle body (1). The left sides of the air hole (5) and the air inlet (6) are connected to the air chamber (7). The nozzle (2) is located inside the air chamber (7).

3. The special nozzle for steel structure paint repair according to claim 1, characterized in that, The top and bottom of the right side of the nozzle body (1) are fixedly connected to corner portions (8), and airflow holes (9) are opened on both sides of the inner side of the corner portions (8).

4. The special nozzle for steel structure paint repair according to claim 3, characterized in that, An airflow cavity (10) is provided inside the corner (8), and the right side of the inner side of the airflow cavity (10) is connected to the outer side of the airflow hole (9).

5. The special nozzle for steel structure paint repair according to claim 4, characterized in that, A through groove (11) is provided on the left side of the nozzle body (1), and the right side of the through groove (11) is connected to the left side of the airflow cavity (10).

6. The special nozzle for steel structure paint repair according to claim 3, characterized in that, A groove (12) is provided on the right side of the outer side of the nozzle body (1), and the groove (12) is located on the outer side of the corner (8).

7. The special nozzle for steel structure paint repair according to claim 1, characterized in that, There are four air holes (5), and they are arranged in pairs, tilted towards the left and right edge areas of the spray painting fan.

8. The special nozzle for steel structure paint repair according to claim 1, characterized in that, The nozzle body (1) is made of hard alloy material and has a corrosion-resistant coating on its surface.

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