A device for cleaning the surface of a hot-dip galvanized pipe fitting

Abstract

The utility model relates to hot galvanizing pipe fitting technical field especially relates to a kind of hot galvanizing pipe fitting surface zinc tumor cleaning device.The hot galvanizing pipe fitting surface zinc tumor cleaning device includes cleaning cylinder, annular cavity is opened in cleaning cylinder, the inner cylinder wall of cleaning cylinder is opened with inclined jet hole, the front end surface of cleaning cylinder is installed with arc-shaped spade, the rear end surface of cleaning cylinder is installed with steel wire ring, and rotating part is installed on cleaning cylinder.The arc-shaped spade of front end in the hot galvanizing pipe fitting surface zinc tumor cleaning device provided by the utility model is driven high-speed rotation by rotating part, can quickly shovel off the zinc tumor of protruding on pipe fitting surface, the steel wire ring of rear end synchronous rotation, carries out fine polishing to zinc tumor root and pipe fitting surface slight protrusion, ensure that there is no zinc tumor residue, simultaneously, the annular cavity in cleaning cylinder is matched with two front and rear inclined inclined jet hole, after nitrogen is passed, nitrogen can evenly cover pipe fitting circumferential surface, guarantee the silver-white appearance and anticorrosive property of galvanizing layer.

Description

Technical Field

[0001] This utility model relates to the field of hot-dip galvanized pipe fittings technology, and in particular to a device for cleaning zinc nodules on the surface of hot-dip galvanized pipe fittings. Background Technology

[0002] Hot-dip galvanized pipe fittings are widely used in water supply and drainage, petrochemicals, power transmission, building fire protection, and many other fields due to their excellent corrosion resistance. However, during the hot-dip galvanizing process, uneven cooling rates of the molten zinc, differences in zinc fluidity, deviations in the angle at which the pipe fitting enters the molten zinc, and trace impurities in the zinc solution can easily cause zinc nodules to form on the surface of the pipe fittings. These nodules not only severely damage the smoothness of the pipe fitting's appearance, but also have low bonding strength with the pipe substrate, making them prone to detachment during subsequent handling and installation. The detached areas become corrosion starting points, significantly shortening the service life of the pipe fittings.

[0003] To address the zinc nodule problem, existing technologies primarily employ manual cleaning and high-pressure air blowing. Manual cleaning involves operators using hand scrapers, sandpaper, or angle grinders to individually remove the zinc nodules. This method relies entirely on manual experience, resulting in extremely low efficiency (5-10 minutes for a single DN100 pipe fitting) and difficulty in ensuring uniform cleaning of the fitting's circumference. Either zinc nodules remain, or over-cleaning damages the galvanized layer. Furthermore, manual operation is physically demanding, and prolonged exposure to zinc slag dust can harm operator health, making it unsuitable for large-scale assembly line production. High-pressure air... The blowing method uses high-pressure air to blow onto the surface of freshly galvanized pipe fittings, removing floating zinc and small zinc nodules through the impact of the airflow. However, the oxygen in the high-pressure air reacts with the high-temperature galvanized layer, causing a dark gray oxide layer (commonly known as "dulling") to form on the pipe fitting surface. This not only damages the silvery-white appearance of the galvanized layer but also reduces the adhesion of the zinc layer and shortens the corrosion protection life. In addition, this method has limited effectiveness in cleaning zinc nodules with strong adhesion and cannot completely remove them. In summary, existing zinc nodule cleaning technologies for hot-dip galvanized pipe fittings suffer from problems such as low efficiency, poor effect, insufficient protection of the galvanized layer, and weak versatility.

[0004] Therefore, it is necessary to provide a new device for cleaning zinc nodules from the surface of hot-dip galvanized pipe fittings to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a device for cleaning zinc nodules on the surface of hot-dip galvanized pipe fittings.

[0006] The zinc nodule cleaning device for hot-dip galvanized pipe fittings provided by this utility model includes a cleaning cylinder, an annular cavity is formed inside the cleaning cylinder, and multiple annularly distributed oblique air jet holes are formed on the inner wall of the cleaning cylinder, and the oblique air jet holes are interconnected with the annular cavity.

[0007] The front end face of the cleaning cylinder is equipped with an arc-shaped shovel blade, and the rear end face of the cleaning cylinder is equipped with a steel wire ring. Two sets of rotating components are installed on the cleaning cylinder, and the arc-shaped shovel blade and the steel wire ring are driven to rotate by the two sets of rotating components respectively.

[0008] Preferably, the inner wall of the cleaning cylinder is provided with two inclined air jet holes, and the two inclined air jet holes are respectively inclined towards the front and rear ends of the cleaning cylinder.

[0009] Preferably, a quick connector that communicates with the annular cavity is fixedly installed on the cleaning cylinder.

[0010] Preferably, the rotating component includes a mounting ring, the outer ring wall of which is fixedly fitted with an external toothed ring, and one side of the mounting ring is fixedly fitted with a T-shaped ring with a T-shaped cross-section. The T-shaped ring is inserted into a T-shaped ring groove opened at the end of the cleaning cylinder and is rotatably connected to the T-shaped ring groove.

[0011] The rotating component also includes a servo motor, which is fixedly mounted on the cleaning cylinder via a frame, and a drive gear is fixedly mounted on the output end of the servo motor, which meshes with an external gear ring.

[0012] Preferably, multiple annularly distributed arc-shaped shovel blades are fixedly installed on the inner ring wall of the mounting ring in the rotating component at the front end of the cleaning cylinder.

[0013] Preferably, a steel wire ring is fixedly installed on the inner ring wall of the mounting ring in the rear rotating component of the cleaning cylinder.

[0014] Preferably, a lifting frame is fixedly installed on the cleaning cylinder.

[0015] Compared with related technologies, the zinc nodule cleaning device for hot-dip galvanized pipe fittings provided by this utility model has the following beneficial effects:

[0016] The arc-shaped shovel at the front end of this invention is driven to rotate at high speed by a rotating component, which can quickly remove protruding zinc nodules from the surface of pipe fittings, especially large hard zinc nodules. The steel wire ring at the rear end rotates synchronously, finely polishing the root of the zinc nodules and the tiny protrusions on the surface of the pipe fittings to ensure that no zinc nodules remain. At the same time, the annular cavity inside the cleaning cylinder cooperates with two inclined jet holes to introduce nitrogen. After nitrogen is introduced, it can evenly cover the circumferential surface of the pipe fittings. On the one hand, the airflow can "wipe" the galvanized layer, reducing the formation of zinc nodules caused by uneven cooling of the zinc liquid. On the other hand, nitrogen, as an inert gas, can isolate oxygen and completely avoid the "darkening" phenomenon caused by existing high-pressure air blowing, ensuring the silvery-white appearance and anti-corrosion performance of the galvanized layer. Attached Figure Description

[0017] Figure 1A schematic diagram of a preferred embodiment of the zinc nodule removal device for hot-dip galvanized pipe fittings provided by this utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view of the cleaning cylinder shown.

[0019] Figure 3 for Figure 1 The diagram shows the installation structure of the wire coil on the rotating component.

[0020] Figure 4 for Figure 1 The diagram shows the installation structure of the arc-shaped shovel blade on the rotating component.

[0021] The following are labeled in the diagram: 1. Cleaning cylinder; 1a. Annular cavity; 1b. Angled air jet; 1c. T-shaped annular groove; 11. Quick connector; 12. Lifting frame; 2. Rotating component; 21. Mounting ring; 22. T-shaped ring; 23. External gear ring; 24. Servo motor; 25. Drive gear; 3. Steel wire ring; 4. Arc-shaped shovel blade. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] Please see Figures 1 to 4 This utility model provides a zinc nodule cleaning device for hot-dip galvanized pipe fittings, which includes a cleaning cylinder 1, a rotating component 2, a wire ring 3, and an arc-shaped shovel 4.

[0025] In the embodiments of this utility model, please refer to Figure 1 and Figure 2 A lifting frame 12 is fixedly installed on the cleaning cylinder 1. An annular cavity 1a is opened inside the cleaning cylinder 1, and multiple annularly distributed oblique air jet holes 1b are opened on the inner wall of the cleaning cylinder 1. The oblique air jet holes 1b are connected to the annular cavity 1a. Two oblique air jet holes 1b are provided on the inner wall of the cleaning cylinder 1, and the two oblique air jet holes 1b are respectively inclined towards the front and rear ends of the cleaning cylinder 1. A quick connector 11 connected to the annular cavity 1a is fixedly installed on the cleaning cylinder 1.

[0026] It should be noted that: the hoisting frame 12 is fixed and hoisted using screws, and then nitrogen blowing is performed. Specifically, the nitrogen delivery pipe is connected to the quick connector 11, so that nitrogen can enter the annular cavity 1a and be sprayed out through two oblique jet holes 1b distributed front and back. At the same time, the hot-dip galvanized steel pipe passes through the surface cleaning cylinder 1. Therefore, the nitrogen sprayed out through the oblique jet holes 1b can evenly cover the circumferential surface of the galvanized steel pipe and evenly blow and wipe the galvanized layer on the surface of the galvanized steel pipe, improving the uniformity and smoothness of the galvanized layer and avoiding zinc nodule defects on the surface of the galvanized steel pipe. In addition, nitrogen is an inert gas, which can effectively prevent the oxidation of the galvanized layer and avoid the defect of darkening on the surface of the galvanized steel pipe when blown with high-pressure air.

[0027] In the embodiments of this utility model, please refer to Figure 1 , Figure 3 and Figure 4 The front end of the cleaning cylinder 1 is equipped with an arc-shaped shovel 4, and the rear end of the cleaning cylinder 1 is equipped with a steel wire ring 3. Two sets of rotating components 2 are installed on the cleaning cylinder 1, and the arc-shaped shovel 4 and the steel wire ring 3 are driven to rotate by the two sets of rotating components 2 respectively.

[0028] The rotating component 2 includes a mounting ring 21, an outer gear ring 23 is fixedly fitted on the outer ring wall of the mounting ring 21, and a T-shaped ring 22 with a T-shaped cross-section is fixedly fitted on one side of the mounting ring 21. The T-shaped ring 22 is inserted into the T-shaped ring groove 1c opened at the end of the cleaning cylinder 1 and is rotatably connected to the T-shaped ring groove 1c. The rotating component 2 also includes a servo motor 24, which is fixedly mounted on the cleaning cylinder 1 through a frame, and a drive gear 25 is fixedly mounted on the output end of the servo motor 24. The drive gear 25 meshes with the outer gear ring 23.

[0029] Multiple annularly distributed arc-shaped shovel blades 4 are fixedly installed on the inner ring wall of the mounting ring 21 in the front rotating component 2 of the cleaning cylinder 1, while a steel wire ring 3 is fixedly installed on the inner ring wall of the mounting ring 21 in the rear rotating component 2 of the cleaning cylinder 1.

[0030] It should be noted that: when the servo motor 24 is turned on, it drives the drive gear 25 to rotate. Since the drive gear 25 is meshed with the external gear ring 23, the mounting ring 21 can rotate. The rotating arc-shaped shovel 4 can remove the zinc nodules on the surface of the galvanized steel pipe that has entered the cleaning cylinder 1, while the rotating wire ring 3 can grind the root of the zinc nodules that are about to be discharged from the cleaning cylinder 1. Therefore, the cooperation between the arc-shaped shovel 4 and the wire ring 3 can greatly improve the cleaning effect of the zinc nodules. Furthermore, when the arc-shaped shovel 4 and the wire ring 3 remove the zinc nodules on the surface of the galvanized steel pipe, the nitrogen gas sprayed from the inclined jet hole 1b can effectively prevent the oxidation of the galvanized layer.

[0031] Among them, a protective cover is installed on the cleaning cylinder 1 to protect the outer gear ring 23 and the drive gear 25, thereby reducing the probability of damage to the outer gear ring 23 and the drive gear 25.

[0032] The working principle of the zinc nodule removal device for hot-dip galvanized pipe fittings provided by this utility model is as follows:

[0033] The front-end arc-shaped shovel 4 is driven to rotate at high speed by the rotating component 2, which can quickly remove the zinc nodules (especially the large hard zinc nodules) on the surface of the pipe fitting. The rear-end wire ring 3 rotates synchronously to finely polish the root of the zinc nodules and the fine protrusions on the surface of the pipe fitting, ensuring that there are no zinc nodules left. At the same time, the annular cavity 1a inside the cleaning cylinder 1 cooperates with the two inclined jet holes 1b to introduce nitrogen. After nitrogen is introduced, it can evenly cover the circumferential surface of the pipe fitting. On the one hand, the airflow can "wipe" the galvanized layer, reducing the formation of zinc nodules caused by uneven cooling of the zinc liquid. On the other hand, nitrogen, as an inert gas, can isolate oxygen and completely avoid the "darkening" phenomenon caused by existing high-pressure air blowing, ensuring the silvery-white appearance and anti-corrosion performance of the galvanized layer.

[0034] The circuits and controls involved in this utility model are all existing technologies and will not be described in detail here.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for cleaning zinc nodules from the surface of hot-dip galvanized pipe fittings, characterized in that, The cleaning cylinder (1) includes a ring-shaped cavity (1a) inside the cleaning cylinder (1), and the inner wall of the cleaning cylinder (1) is provided with a plurality of annularly distributed oblique jet holes (1b), which are interconnected with the ring-shaped cavity (1a). The front end face of the cleaning cylinder (1) is equipped with an arc-shaped shovel (4), and the rear end face of the cleaning cylinder (1) is equipped with a wire ring (3). Two sets of rotating components (2) are installed on the cleaning cylinder (1), and the arc-shaped shovel (4) and the wire ring (3) are driven to rotate by the two sets of rotating components (2).

2. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 1, characterized in that, The inner wall of the cleaning cylinder (1) is provided with two inclined air jet holes (1b), and the two inclined air jet holes (1b) are respectively inclined towards the front and rear ends of the cleaning cylinder (1).

3. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 2, characterized in that, A quick connector (11) that communicates with the annular cavity (1a) is fixedly installed on the cleaning cylinder (1).

4. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 1, characterized in that, The rotating component (2) includes a mounting ring (21), an outer toothed ring (23) is fixedly fitted on the outer ring wall of the mounting ring (21), and a T-shaped ring (22) with a T-shaped cross-section is fixedly fitted on one side of the mounting ring (21). The T-shaped ring (22) is inserted into the T-shaped ring groove (1c) opened at the end of the cleaning cylinder (1) and is rotatably connected to the T-shaped ring groove (1c). The rotating component (2) also includes a servo motor (24), which is fixedly mounted on the cleaning cylinder (1) via a frame, and a drive gear (25) is fixedly mounted on the output end of the servo motor (24), which meshes with the external gear ring (23).

5. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 4, characterized in that, Multiple annularly distributed arc-shaped shovel blades (4) are fixedly installed on the inner ring wall of the mounting ring (21) in the front rotating component (2) of the cleaning cylinder (1).

6. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 4, characterized in that, A steel wire ring (3) is fixedly installed on the inner ring wall of the mounting ring (21) in the rear rotating component (2) of the cleaning cylinder (1).

7. The zinc nodule cleaning device for hot-dip galvanized pipe fittings according to claim 1, characterized in that, A hoisting frame (12) is fixedly installed on the cleaning cylinder (1).

Images