Galvanized air knife device

Abstract

The utility model relates to a galvanizing air knife device, and belongs to the technical field of profile steel surface treatment. According to the technical scheme, the device comprises air knife rests (6) fixed to cross beams (10) on the left side and the right side of an assembly line, air knives (3) are arranged on the air knife rests (6), the air knives are tubular, the shapes of the air knives are matched with the shapes of workpieces (11) to be subjected to zinc blowing, and the workpieces (11) are driven by a roller way to enter the air knives. At least one circle of air knife holes (4) are evenly formed in the pipe walls of the edge portions of the two ends of the air knife (3) in the running direction of a workpiece (11), the air knife (3) is communicated with a seamless pipe (2) installed on an air knife rest (6), a connector (12) at the end of the seamless pipe is detachably connected with a high-pressure pipeline through a loose joint, and an electromagnetic pressure reducing valve is arranged on the high-pressure pipeline. According to the utility model, the air knife is detachably connected with the air inlet pipeline and can be quickly detached; the air cutter is provided with three air inlets, three-way air inlet can be achieved, and air inlet is uniform.

Description

Technical Field

[0001] The utility model relates to a galvanizing air knife device, belonging to the technical field of section steel surface treatment. Background Art

[0002] In the hot-dip galvanizing process, after the iron substrate is surface treated, it is placed in a molten zinc liquid at a certain temperature. The surface of the iron substrate reacts fully with the molten zinc liquid, so that the iron substrate obtains a corrosion-resistant coating.

[0003] For the surface treatment of iron substrate, the surface of iron substrate needs to be pickled first to remove the iron oxide scale on the surface of iron substrate. After pickling, the workpiece is washed with water to clean the residual acid and iron oxide scale on the surface of iron substrate, and then the workpiece is immersed in plating solution. Before galvanizing, in order to prevent zinc explosion, the workpiece needs to be dried. After drying, the workpiece is conveyed into molten zinc liquid for galvanizing. After galvanizing, the workpiece is blown clean by wind knife.

[0004] The existing air knife is fixedly connected to the air inlet duct, and the air knife cannot be replaced. In addition, the air inlet position of the air knife is not set reasonably. When the workpiece passes through the air knife, the air inlet is uneven, and the zinc liquid on the surface of the workpiece cannot be blown clean, so that the zinc liquid remains on the surface of the workpiece. Utility Model Content

[0005] The purpose of the utility model is to provide a galvanizing air knife device, in which the air knife and the air inlet duct are detachably connected, which is convenient for replacing the air knife. At the same time, the position of the air knife air inlet is reasonably arranged, so that the zinc liquid on the surface of the workpiece can be blown away without zinc liquid residue, thereby solving the above-mentioned problems existing in the background technology.

[0006] The technical solution of the utility model is:

[0007] A galvanizing air knife device comprises an air knife frame fixed on the beams on the left and right sides of the assembly line, the air knife frame is provided with an air knife, the air knife is tubular, and its shape matches the shape of the workpiece to be galvanized, the workpiece is driven by a roller to enter the inside of the air knife, at least one circle of air knife holes are evenly arranged on the pipe wall at the edge parts of both ends of the air knife along the running direction of the workpiece, the air knife is connected to the seamless pipe installed on the air knife frame, the joint at the end of the seamless pipe is detachably connected to the high-pressure pipeline through a flexible joint, an electromagnetic pressure reducing valve is provided on the high-pressure pipeline, and the electromagnetic pressure reducing valve is connected to the air source.

[0008] Furthermore, the wind blade frame is a steel plate, an opening is provided in the middle of the wind blade frame, and the wind blade is installed at the opening; the upper and lower ends of the wind blade frame are respectively provided with mounting hole one and mounting hole two, and the number of seamless tubes is three, which are respectively connected with an air inlet at the upper end and two air inlets at the lower end of the wind blade; a seamless tube at the upper end is fixed to mounting hole one by a U-shaped clamp one and locked by a lock nut one, and two seamless tubes at the lower end are fixed to mounting hole two by a U-shaped clamp two and locked by a lock nut two.

[0009] Furthermore, the apertures of all the air knife holes are the same, and the intervals between two adjacent air knife holes are the same.

[0010] Furthermore, a sensing device is provided at the inlet position of the air knife, and the sensing device transmits a signal to the electromagnetic pressure reducing valve to control the opening and closing of the electromagnetic pressure reducing valve.

[0011] Furthermore, the gas source comes from a gas storage tank.

[0012] Furthermore, the first mounting hole and the second mounting hole are both strip-shaped holes, and the edges of the strip-shaped holes are chamfered at C angles.

[0013] Furthermore, the size of the opening arranged at the middle position of the wind knife holder is larger than the size of the wind knife, and the installation position of the wind knife can be adjusted.

[0014] The positive effects of the utility model are as follows: the wind knife is detachably connected to the air inlet duct, and can be quickly disassembled when the wind knife is abnormal, so as to achieve flexible processing, improve efficiency and save time; the wind knife has three air inlets, which can intake air in three directions and evenly, and at least one circle of zinc blowing holes is added to the edge parts of both ends of the wind knife, so that the zinc blowing on the surface of the workpiece is more even; the wind knife is fixed by U-shaped clamps 1 and 2 arranged above and below, so that the stability of the wind knife is enhanced, and the position of the wind knife can be adjusted to adapt to the position of the roller and the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0016] Figure 2 A schematic diagram of an air knife according to an embodiment of the present application;

[0017] In the figure: 1. electromagnetic pressure reducing valve; 2. seamless pipe; 3. air knife; 4. air knife hole; 5. induction device; 6. air knife holder; 71. mounting hole 1; 72. mounting hole 2; 81. U-type clamp 1; 82. U-type clamp 2; 91. anti-loosening nut 1; 92. anti-loosening nut 2; 10. crossbeam; 11. workpiece; 12. joint; 13 flexible joint; 14. high-pressure pipeline. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] A galvanizing air knife device comprises an air knife frame 6 fixed on a beam 10 on the left and right sides of an assembly line, an air knife 3 is arranged on the air knife frame 6, the air knife 3 is tubular, and its shape matches the appearance of a workpiece 11 to be galvanized, the workpiece 11 is driven by a roller to enter the air knife 3, at least one circle of air knife holes 4 are evenly arranged on the pipe wall at the edge parts of both ends of the air knife 3 along the running direction of the workpiece 11, the air knife 3 is connected to a seamless pipe 2 installed on the air knife frame 6, a joint 12 at the end of the seamless pipe 2 is detachably connected to a high-pressure pipeline 14 through a flexible joint 13, an electromagnetic pressure reducing valve 1 is arranged on the high-pressure pipeline 14, and the electromagnetic pressure reducing valve 1 is connected to an air source.

[0020] The wind blade frame 6 is a steel plate, and an opening is provided in the middle of the wind blade frame 6, and the wind blade 3 is installed at the opening; the upper and lower ends of the wind blade frame 6 are respectively provided with a mounting hole 71 and a mounting hole 72, and the number of seamless tubes 2 is three, which are respectively connected with an air inlet at the upper end and two air inlets at the lower end of the wind blade 3; a seamless tube 2 at the upper end is fixed to the mounting hole 71 by a U-shaped clamp 81 and locked by a lock nut 91; and the two seamless tubes 2 at the lower end are fixed to the mounting hole 72 by a U-shaped clamp 82 and locked by a lock nut 92.

[0021] Preferably, the apertures of all the air knife holes 4 are the same, and the intervals between two adjacent air knife holes 4 are the same.

[0022] Preferably, a sensing device 5 is provided at the inlet position of the air knife 3, and the sensing device 5 transmits a signal to the electromagnetic pressure reducing valve 1 to control the opening and closing of the electromagnetic pressure reducing valve 1.

[0023] Preferably, the gas source comes from a gas tank.

[0024] Preferably, the first mounting hole 71 and the second mounting hole 72 are both bar-shaped holes, and the edges of the bar-shaped holes are chamfered at C angles.

[0025] Preferably, the size of the opening arranged in the middle of the wind knife holder is larger than the size of the wind knife, and the installation position of the wind knife can be adjusted.

[0026] See attached Figure 1 and 2 In this embodiment, the workpiece 11 is an angle steel, and the air knife 3 is formed by cutting and welding a Q235 square tube. Two Q235 square tubes are cut and aligned and welded, and the interiors of the two Q235 square tubes are connected to form a channel that matches the shape of the angle steel. A circle of air knife holes 4 are respectively arranged on the tube wall at the edges of both ends of the air knife 3 along the running direction of the workpiece 11.

[0027] The wind blade holder 6 is made of smooth high-strength steel with high hardness and no zinc adhesion, which reduces the work intensity of the operator. The middle part of the wind blade holder 6 is open, and the wind blade 3 is installed at the opening. The opening size is larger than the outer size of the wind blade 3, and the installation position of the wind blade 3 can be adjusted. The upper and lower ends of the wind blade holder 6 are respectively provided with a mounting hole 1 71 and a mounting hole 2 72. The mounting hole 1 71 and the mounting hole 2 72 are both bar holes, and the edges of the bar holes are chamfered at C angles. The number of seamless tubes 2 is three, and one end of the three seamless tubes 2 is respectively connected to an air inlet at the upper end and two air inlets at the lower end of the wind blade 3. A seamless tube 2 at the upper end is fixed to the mounting hole 1 71 by a U-shaped clamp 1 81 and locked by a locking nut 1 91, and the two seamless tubes 2 at the lower end are fixed to the mounting hole 2 72 by a U-shaped clamp 2 82 and locked by a locking nut 2 92.

[0028] The other ends of the three seamless pipes 2 are welded with joints 12, and the joints 12 of the three seamless pipes 2 are respectively threadedly connected to the flexible joints 13 at one end of the corresponding high-pressure pipelines 14, which are easy to disassemble. The other ends of the three seamless pipes 2 are respectively connected to the corresponding gas storage tanks through electromagnetic ball valves 1. The electromagnetic pressure reducing valve 1 controls the air supply of the three high-pressure pipelines 14. When the workpiece passes through the air knife 3, there is a sensing device 5 in front of the air knife 3. When the sensing device 5 transmits a signal to the electromagnetic pressure reducing valve 1, the electromagnetic pressure reducing valve 1 opens, the pipeline is ventilated, and the zinc on the surface of the workpiece 11 is blown off. The signal is transmitted to the electromagnetic pressure reducing valve 1 by the sensing device 5, the air volume is reduced, and the purpose of reducing gas consumption is achieved.

[0029] The wind knife 3 has three-way air inlet, and the air inlet is uniform, which enhances the zinc blowing effect, thereby achieving the purpose of improving the surface quality of the workpiece and reducing the amount of zinc applied. At the same time, the thickness of the zinc layer can be selectively controlled.

[0030] The workpiece 11 is transported above the assembly line through a roller conveyor mechanism, which is not shown in the roller diagram. Before passing through the air knife 3, the induction device 5 detects the workpiece 11, and the induction device 5 transmits a signal to the electromagnetic pressure reducing valve 1. The electromagnetic pressure reducing valve 1 opens for ventilation, and the air knife hole 4 blows air to blow away and clean the zinc on the surface of the workpiece 11. The air knife has three-way ventilation, uniform air intake, and sufficient air pressure, so as to achieve the purpose of improving the surface quality and reducing the amount of zinc applied. At the same time, the thickness of the zinc layer can be selectively controlled. The air knife 3 can be quickly replaced by rotating the joint 13, rotating the anti-loosening nut 1 91 and the anti-loosening nut 2 92.

[0031] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A galvanizing air knife device, characterized in that: The invention comprises a wind knife frame (6) fixed on a beam (10) on the left and right sides of the production line, wherein the wind knife frame (6) is provided with a wind knife (3), the wind knife (3) is tubular, and its shape matches the shape of a workpiece (11) to be zinc-blown, the workpiece (11) is driven by a roller to enter the wind knife (3), at least one circle of wind knife holes (4) are evenly arranged on the pipe wall at the edge of both ends of the wind knife (3) along the running direction of the workpiece (11), the wind knife (3) is connected to a seamless pipe (2) installed on the wind knife frame (6), a joint (12) at the end of the seamless pipe (2) is detachably connected to a high-pressure pipeline (14) through a flexible joint (13), and an electromagnetic pressure reducing valve (1) is provided on the high-pressure pipeline (14), and the electromagnetic pressure reducing valve (1) is connected to an air source.

2. A galvanizing air knife device according to claim 1, characterized in that: The wind blade frame (6) is a steel plate. An opening is provided in the middle of the wind blade frame (6), and the wind blade (3) is installed at the opening. The wind blade frame (6) is provided with a first mounting hole (71) and a second mounting hole (72) at the upper and lower ends, respectively. There are three seamless tubes (2), which are respectively connected to an upper air inlet and two lower air inlets of the wind blade (3). A seamless tube (2) at the upper end is fixed to the first mounting hole (71) by a first U-shaped clamp (81) and is locked by a first locking nut (91). The two seamless tubes (2) at the lower end are fixed to the second mounting hole (72) by a second U-shaped clamp (82) and are locked by a second locking nut (92).

3. A galvanizing air knife device according to claim 1 or 2, characterized in that: The apertures of all the air knife holes (4) are the same, and the intervals between two adjacent air knife holes (4) are the same.

4. A galvanizing air knife device according to claim 1 or 2, characterized in that: A sensing device (5) is provided at the inlet of the air knife (3), and the sensing device (5) transmits a signal to the electromagnetic pressure reducing valve (1) to control the opening and closing of the electromagnetic pressure reducing valve (1).

5. A galvanizing air knife device according to claim 1 or 2, characterized in that: The gas source comes from a gas storage tank.

6. The galvanizing air knife device according to claim 2, characterized in that: The first mounting hole (71) and the second mounting hole (72) are both strip-shaped holes, and the edges of the strip-shaped holes are chamfered at C angles.

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