A quenching device

Abstract

The present invention relates to the field of quenching, and specifically to a quenching device. It includes a bracket, a quenching cylinder, a ring blowing structure and a rotating structure; the ring blowing structure is arranged on the bracket, and includes a ring blowing cylinder, a ring blowing pipe and an air supply cylinder. The ring blowing pipe is arranged along the tangential direction of the quenching cylinder, one end of which passes through the ring blowing cylinder and is connected to the quenching cylinder, and the other end extends outward and is connected to the outside world. The liquid nitrogen box pushes liquid nitrogen into the air supply pipe, so that the liquid nitrogen enters the ring blowing pipe with the cold air, and enters the quenching cylinder from the ring blowing pipe, and then enters the quenching cylinder through the ring blowing pipe and flows in the quenching cylinder. When the cold air is blown out from the ring blowing pipe, a vortex is formed around the aluminum alloy extruded profile, so that the aluminum alloy extruded profile is quickly and evenly cooled to achieve uniform quenching of the aluminum alloy extruded profile.

Description

Technical Field

[0001] The present invention relates to the field of quenching, and in particular to a quenching device. Background Art

[0002] Aluminum alloy profiles are the most widely used nonferrous metal structural materials in industry. Aluminum alloy extruded profiles, especially hollow aluminum alloy profiles, are widely used in the manufacture of load-bearing structural materials in various fields such as construction, transportation, and aerospace due to their high strength, low specific gravity, and ease of forming. In the production of hollow aluminum alloy profiles, the alloy is first formed by extrusion, then rapidly cooled and quenched online to form a supersaturated solid solution, and then artificially aged to achieve the desired properties. Quenching of aluminum alloy extruded profiles generally involves air quenching and water quenching, with online quenching often employed.

[0003] In the prior art, for example, a Chinese patent application with publication number CN113373286B, entitled "Liquid Nitrogen Cooling and Quenching Equipment for Extrusion Production of Aluminum Alloy Profiles and Cooling and Quenching Process for Aluminum Alloy Profiles," discloses a technical solution comprising a conveyor rack for conveying aluminum alloy profiles and a liquid nitrogen pipe for conveying liquid nitrogen. The liquid nitrogen pipe is located directly above the conveyor rack and is connected to a liquid nitrogen barrel. The liquid nitrogen pipe is provided with a plurality of liquid outlet nozzles along its own axis, with the openings of the liquid outlet nozzles facing the conveyor rack. An air supply mechanism is provided around the liquid nitrogen pipe for blowing liquid nitrogen toward the surface of the aluminum alloy profile. The air supply mechanism includes an upper air supply assembly for supplying air toward the conveyor rack and a lower air supply assembly for supplying air toward the liquid nitrogen pipe. When cooling and quenching the aluminum alloy profiles, the upper and lower air supply assemblies blow liquid nitrogen toward the surface of the aluminum alloy profiles, forming vertical convection of the liquid nitrogen. Similarly, left and right fans are used to prevent the liquid nitrogen from escaping to the left and right, thereby saving liquid nitrogen. However, since most aluminum alloy profiles are irregular in shape and uneven in thickness, when air is blown all around the aluminum alloy profile, cold air from four directions may form turbulence on the surface of the aluminum alloy profile, making it impossible for the cold air to effectively restrict the flow direction of liquid nitrogen, resulting in uneven liquid nitrogen on the surface of the aluminum alloy profile, which may cause uneven cooling of the aluminum alloy profile. Summary of the Invention

[0004] The present invention provides a quenching device to solve the above problems.

[0005] A quenching device of the present invention adopts the following technical solution: a quenching device includes a bracket, a quenching cylinder, a ring blowing structure and a rotating structure;

[0006] The bracket is set up front and back; the bracket is equipped with a conveying device for aluminum alloy extruded profiles;

[0007] The quenching cylinder axis is arranged front and back, with a feed port at the front end and a discharge port at the rear end;

[0008] The ring-blowing structure is provided on the bracket, and includes a ring-blowing cylinder, a ring-blowing pipe and an air supply cylinder; the ring-blowing cylinder is provided on the outer peripheral wall of the quenching cylinder; a plurality of ring-blowing pipes are provided, which are evenly distributed along the circumference of the ring-blowing cylinder; the ring-blowing pipe is provided along the tangential direction of the quenching cylinder, one end of the ring-blowing pipe passes through the ring-blowing cylinder and is connected to the quenching cylinder, and the other end extends outward and is connected to the outside; the air supply cylinder is sleeved on the outside of the ring-blowing cylinder, and a gap is provided between the ring-blowing cylinder and the ring-blowing cylinder to form a sealed air supply cavity; the outside of the air supply cylinder is connected to a cold air structure;

[0009] The rotating structure is used to drive the aluminum alloy extruded profile to rotate after the aluminum alloy extruded profile enters the quenching cylinder.

[0010] Furthermore, the rotating structure includes a front wheel and a rear wheel; the front wheel is rotatably installed in the feed port; a front through hole is provided at the axis of the front wheel; a support clamp is installed in the front through hole; the rear wheel is rotatably installed in the discharge port; a rear through hole is provided at the axis of the rear wheel.

[0011] Furthermore, a transmission gear is fixed on the outer periphery of the front rotating wheel; a rotating motor is fixedly installed on the bracket; and the output shaft of the rotating motor is driven by meshing the gear and the transmission gear.

[0012] Furthermore, a front exhaust hole is provided at the outer periphery of the front runner; a rear exhaust hole is provided at the axis of the rear runner; a counterflow cone is provided on the front runner; the counterflow cone is provided in the quenching cylinder, with the small end facing the rear end of the quenching cylinder and the large end fixedly connected to the front runner;

[0013] The inner end of the ring blowing pipe is extended toward the front end of the quenching tube, so as to allow the cold air to flow from the rear end to the front end of the quenching tube.

[0014] Furthermore, multiple ring blowing structures are provided along the axis of the quenching cylinder.

[0015] Furthermore, the air supply cylinder is connected to an air supply pipe; the air supply pipe is connected to a centrifugal fan; the middle of the air supply pipe is connected to a liquid nitrogen box; the liquid nitrogen box and the liquid nitrogen tank are connected through a hose.

[0016] Furthermore, the support clip is detachably fixedly mounted in the front through hole via a spline.

[0017] Furthermore, the conveying device includes a plurality of conveying rollers evenly distributed along the front and back; the conveying rollers are rotatably mounted on the bracket.

[0018] The present invention has the following beneficial effects: cold air is fed into the air supply duct, then passes through the ring-shaped blowpipe into the quenching tube, and flows within the quenching tube. Furthermore, when the cold air is blown out of the ring-shaped blowpipe, it forms a vortex around the aluminum alloy extruded profile, thereby rapidly and evenly cooling the aluminum alloy extruded profile, thereby achieving uniform quenching of the aluminum alloy extruded profile.

[0019] Furthermore, the inner end of the ring blowpipe extends toward the front end of the quenching tube, allowing cold air to flow from the rear end to the front end of the quenching tube. When the cold air is blown out of the ring blowpipe, a vortex is formed around the aluminum alloy extruded profile. Due to the same angular velocity, the linear velocity of the vortex from the surface of the aluminum alloy extruded profile to the inner wall of the quenching tube is differential. When the middle vortex reaches the reversal cone, part of it is discharged and diffused outward through the front exhaust hole together with the outer vortex, while the other part flows in the opposite direction toward the rear end of the quenching tube under the action of the reversal cone. After the inner vortex removes the heat from the aluminum alloy extruded profile, friction and heat exchange are generated between it and the outer vortex, forming a vortex tube effect, thereby rapidly cooling the aluminum alloy extruded profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of a quenching device of the present invention;

[0022] Figure 2 A front view of an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 It is a cross-sectional view from another angle of an embodiment of the present invention.

[0026] In the figure: 100, bracket; 110, liquid nitrogen tank; 120, air supply pipe; 200, quenching cylinder; 300, ring blowing structure; 310, ring blowing cylinder; 320, ring blowing pipe; 330, air supply cylinder; 340, front exhaust hole; 350, rear exhaust hole; 360, backflow cone; 400, rotating structure; 410, front rotor; 420, support clamp; 430, rear rotor; 440, rotating motor. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] An embodiment of a quenching device of the present invention is as follows Figures 1 to 5 As shown: A quenching device includes a bracket 100, a quenching cylinder 200, a ring blowing structure 300 and a rotating structure 400;

[0029] The bracket 100 is arranged front and back; a conveying device for aluminum alloy extruded profiles is provided on the bracket 100; the conveying device includes a plurality of conveying rollers uniformly distributed along the front and back; the conveying rollers are rotatably mounted on the bracket 100.

[0030] The quenching cylinder 200 is arranged in front and back of the axis, with a feed port at the front end and a discharge port at the rear end;

[0031] The ring blowing structure 300 is provided on the bracket 100, and includes a ring blowing cylinder 310, a ring blowing pipe 320 and an air supply cylinder 330; the ring blowing cylinder 310 is provided on the outer peripheral wall of the quenching cylinder 200; there are multiple ring blowing pipes 320, which are evenly distributed along the circumference of the ring blowing cylinder 310; the ring blowing pipe 320 is arranged along the tangential direction of the quenching cylinder 200, one end of the ring blowing pipe 320 passes through the ring blowing cylinder 310 and is connected to the quenching cylinder 200, and the other end extends outward and is connected to the outside; the air supply cylinder 330 is sleeved on the outside of the ring blowing cylinder 310, and a gap is provided between the ring blowing cylinder 310 and the ring blowing cylinder 310 to form a sealed air supply cavity; the outside of the air supply cylinder 330 is connected to the cold air structure;

[0032] The rotating structure 400 is used to rotate the aluminum alloy extruded profile after it enters the quenching cylinder 200. During operation, cold air is delivered into the air supply cylinder 330, then passes through the ring blowpipe 320 into the quenching cylinder 200 and flows within the quenching cylinder 200. As the cold air exits the ring blowpipe 320, it forms a vortex around the aluminum alloy extruded profile, rapidly and evenly cooling it and achieving uniform quenching.

[0033] In this embodiment, the rotating structure 400 includes a front rotating wheel 410 and a rear rotating wheel 430; the front rotating wheel 410 is rotatably installed in the feed port; a front through hole is provided at the axis center of the front rotating wheel 410; a support clamp 420 is installed in the front through hole; the rear rotating wheel 430 is rotatably installed in the discharge port; a rear through hole is provided at the axis center of the rear rotating wheel 430.

[0034] In this embodiment, a transmission gear is fixed on the outer periphery of the front rotating wheel 410; a rotating motor 440 is fixedly mounted on the bracket 100; and the output shaft of the rotating motor 440 is driven by meshing gears with the transmission gear.

[0035] In this embodiment, a front exhaust hole 340 is provided on the outer periphery of the front runner 410; a rear exhaust hole 350 is provided at the axis of the rear runner 430; a reverse flow cone 360 ​​is provided on the front runner 410; the reverse flow cone 360 ​​is disposed in the quenching cylinder 200, with the small end facing the rear end of the quenching cylinder 200 and the large end fixedly connected to the front runner 410;

[0036] The inner end of the ring blowpipe 320 extends toward the front end of the quenching tube 200. It is used to direct cold air from the rear end to the front end of the quenching tube 200. When the cold air is blown out of the ring blowpipe 320, a vortex is formed around the aluminum alloy extruded profile. Due to the same angular velocity, a differential linear velocity occurs between the surface of the aluminum alloy extruded profile and the inner wall of the quenching tube 200. When the central vortex reaches the reversing cone 360, part of it is discharged and diffused outward through the front exhaust holes 340 together with the outer vortexes. The remaining part, under the action of the reversing cone 360, flows in the opposite direction toward the rear end of the quenching tube 200. After removing heat from the aluminum alloy extruded profile, the inner vortex generates friction and heat exchange with the outer vortex, forming a vortex tube effect, thereby rapidly cooling the aluminum alloy extruded profile.

[0037] In this embodiment, multiple ring blowing structures 300 are provided along the axis of the quenching cylinder 200, which are used to quench the longer aluminum alloy extruded profiles at the same time in the longitudinal direction, thereby reducing bending deformation caused by uneven cooling in the front and rear directions.

[0038] In this embodiment, the air supply tube 330 is connected to the air supply pipe 120; the air supply pipe 120 is connected to a centrifugal fan; the middle part of the air supply pipe 120 is connected to the liquid nitrogen tank 110; the liquid nitrogen tank 110 and the liquid nitrogen tank are connected by a hose, which is used to push liquid nitrogen into the air supply pipe 120, so that the liquid nitrogen enters the ring blowpipe 320 with the cold air, and enters the quenching cylinder 200 from the ring blowpipe 320.

[0039] In this embodiment, the support clip 420 is detachably fixed in the front through hole via a spline, and is used for replacement according to the shape of different aluminum alloy extruded profiles.

[0040] In conjunction with the above embodiments, the operating principle and process of the present invention are as follows: During operation, the liquid nitrogen tank 110 pushes liquid nitrogen into the air supply pipe 120, allowing the liquid nitrogen to enter the ring blowpipe 320 along with the cold air, and then enter the quenching cylinder 200 from the ring blowpipe 320. Thereafter, the liquid nitrogen passes through the ring blowpipe 320 and enters the quenching cylinder 200, where it flows within the quenching cylinder 200. When the cold air is blown out of the ring blowpipe 320, a vortex is formed around the aluminum alloy extruded profile, thereby rapidly and evenly cooling the aluminum alloy extruded profile, thereby achieving uniform quenching of the aluminum alloy extruded profile.

[0041] Furthermore, the inner end of the ring blowpipe 320 extends toward the front end of the quenching tube 200. This allows cold air to flow from the rear end to the front end of the quenching tube 200. When the cold air is blown out of the ring blowpipe 320, a vortex is formed around the aluminum alloy extruded profile. Due to the same angular velocity, a difference in linear velocity occurs between the surface of the aluminum alloy extruded profile and the inner wall of the quenching tube 200. When the central vortex reaches the reversing cone 360, part of it is discharged and diffused outward through the front exhaust holes 340 together with the outer vortexes, while the other part flows in the opposite direction toward the rear end of the quenching tube 200 under the action of the reversing cone 360. After the inner vortex removes heat from the aluminum alloy extruded profile, friction and heat exchange occur between it and the outer vortex, forming a vortex tube effect, thereby rapidly cooling the aluminum alloy extruded profile.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quenching device, characterized in that: include: The bracket (100) is arranged front and back; the bracket (100) is provided with a conveying device for the aluminum alloy extruded profile; The quenching cylinder (200) is arranged with an axis in front and back, with a feed port at the front end and a discharge port at the rear end; The ring blowing structure (300) is provided on the bracket (100), and comprises a ring blowing cylinder (310), a ring blowing pipe (320) and an air supply cylinder (330); the ring blowing cylinder (310) is provided on the outer peripheral wall of the quenching cylinder (200); a plurality of ring blowing pipes (320) are provided, and are evenly distributed along the circumference of the ring blowing cylinder (310); the ring blowing pipe (320) is provided along the tangential direction of the quenching cylinder (200), one end of which passes through the ring blowing cylinder (310) and is connected to the quenching cylinder (200), and the other end extends outward and is connected to the outside; the air supply cylinder (330) is sleeved on the outside of the ring blowing cylinder (310), and a gap is provided between the ring blowing cylinder (310) and the ring blowing cylinder (310) to enclose a sealed air supply cavity; the outside of the air supply cylinder (330) is connected to a cold air structure; A rotating structure (400) is used to drive the aluminum alloy extruded profile to rotate after the aluminum alloy extruded profile enters the quenching cylinder (200); The rotating structure (400) includes a front rotating wheel (410) and a rear rotating wheel (430); the front rotating wheel (410) is rotatably mounted in the feed port; a front through hole is provided at the axis of the front rotating wheel (410); a support clamp (420) is installed in the front through hole; the rear rotating wheel (430) is rotatably mounted in the discharge port; a rear through hole is provided at the axis of the rear rotating wheel (430); A transmission gear is fixed on the outer periphery of the front rotating wheel (410); a rotating motor (440) is fixedly mounted on the bracket (100); an output shaft of the rotating motor (440) is driven by meshing with a gear and a transmission gear; A front exhaust hole (340) is provided at the outer periphery of the front rotating wheel (410); a rear exhaust hole (350) is provided at the axis of the rear rotating wheel (430); a reverse flow cone (360) is provided on the front rotating wheel (410); the reverse flow cone (360) is arranged in the quenching cylinder (200), with the small end facing the rear end of the quenching cylinder (200) and the large end fixedly connected to the front rotating wheel (410); The inner end of the ring blowing pipe (320) is extended toward the front end of the quenching cylinder (200).

2. A quenching device according to claim 1, characterized in that: A plurality of ring blowing structures (300) are provided along the axis of the quenching cylinder (200).

3. A quenching device according to claim 1, characterized in that: The air supply tube (330) is connected to an air supply pipe (120); the air supply pipe (120) is connected to a centrifugal fan; the middle of the air supply pipe (120) is connected to a liquid nitrogen box (110); the liquid nitrogen box (110) and the liquid nitrogen tank are connected via a hose.

4. A quenching device according to claim 1, characterized in that: The support clip (420) is detachably fixedly mounted in the front through hole via a spline.

5. A quenching device according to claim 1, characterized in that: The conveying device comprises a plurality of conveying rollers evenly distributed along the front and back; the conveying rollers are rotatably mounted on a bracket (100).

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