Cooler for cooling inner cavity of aluminum profile

Abstract

The cooler comprises a sleeve, a nozzle connecting pipe, an air seal head and a fixing spring, one end of the sleeve is an extrusion end, the other end of the sleeve is a control end, the sleeve is composed of an inner-layer pipe and an interlayer pipe, cooling liquid is introduced into the inner-layer pipe, cooling air is introduced into the interlayer pipe, the nozzle connecting pipe penetrates through the inner-layer pipe and the interlayer pipe, and the air seal head is connected with the air seal head. The inside and the outside of the sleeve are connected, the nozzle can be installed outside the nozzle connecting pipe according to needs, the air seal head is located at the extrusion end of the sleeve and seals the inner-layer pipe, an outlet of the air seal head faces the extrusion end, cooling air in the sleeve is sprayed out towards the control end through the air seal head, and one end of the fixing spring is connected to the surface of the outer wall of the sleeve. And the other end abuts against the inner cavity wall surface of the aluminum profile, so that the cooler and the aluminum profile are relatively fixed in the radial direction. The cooling device has the advantages that the cooling problem of the internal structure of the aluminum profile is solved, the outer wall face and internal components of the aluminum profile are cooled at the same time, cooling uniformity is good, and indexes such as the strength of the finished aluminum profile are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile processing equipment technology, and specifically to a cooler for cooling the inner cavity of aluminum profiles. Background Technology

[0002] Heat treatment of aluminum profiles is a process in which aluminum profiles are heated to a suitable temperature using a specific medium and then cooled at different rates. Heat treatment is one of the important processes in aluminum profile production. Compared with other processing techniques, heat treatment typically does not change the shape or overall chemical composition of the aluminum profile. Instead, it alters the microscopic crystalline structure inside the aluminum profile or changes the chemical composition of the surface, thereby imparting or improving the performance characteristics of the aluminum profile. Its main feature is the improvement of the intrinsic quality of the aluminum profile.

[0003] To meet process requirements, cooling of aluminum profiles is typically carried out during the extrusion process. Existing technology and equipment usually use air cooling, water cooling, or spray water mist cooling to cool the aluminum profiles. However, regardless of the cooling method, only the cooling rate can be adjusted, and it is impossible to guarantee good cooling uniformity, resulting in poor heat treatment quality and even cracking or deformation of the aluminum profiles. This is especially true for tubes with internal cavities or even internal components, where the cooling process can only be carried out on the outer surface. Since the cooling medium cannot enter the interior of the aluminum profile, its internal structure cannot be cooled, further leading to uneven cooling and even severe radial thermal stress, which negatively impacts the heat treatment quality of the aluminum profiles.

[0004] Based on this, the present invention designs a cooler for cooling the inner cavity of aluminum profiles, which solves the problem of cooling uniformity of aluminum profiles, and in particular solves the problem of cooling and uniformity of the inner cavity of aluminum profiles. Summary of the Invention

[0005] The purpose of this invention is to provide a cooler for cooling the inner cavity of aluminum profiles, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A cooler for cooling the inner cavity of aluminum profiles consists of a sleeve, a nozzle connecting pipe, an air seal head, and a fixing spring. The sleeve is composed of a jacketed tube and an inner tube. Cooling gas flows through the jacketed tube, and coolant flows through the inner tube. One end of the sleeve near the aluminum profile extrusion port is the extrusion end, and the other end is the control end, which has a control mechanism.

[0007] The nozzle connecting pipe has its inlet connected to the inside of the inner tube and its outlet connected to the outside of the sandwich tube. There are multiple nozzle connecting pipes, which are evenly arranged along the circumference of the sleeve and equidistantly arranged along the axial direction of the sleeve. The hydraulic diameter of the nozzle connecting pipe inlet varies monotonically along the direction from the control end to the extrusion end.

[0008] The gas seal head is located at the extrusion end and consists of a cap and a bend. The cap seals the inner tube, and the bend is connected to the jacket tube. Cooling gas passes through the jacket tube and the bend in sequence and enters the outside of the casing from the outlet of the bend.

[0009] One end of the fixed spring is the fixed end, which is connected to the outer wall of the jacketed tube. The other end of the fixed spring is the free end, which abuts against the inner cavity surface of the aluminum profile when the cooler is working. There are multiple fixed springs, which are evenly arranged along the sleeve.

[0010] The lengths of the jacketed tube and the inner tube are matched according to the supply method of cooling gas and coolant. The inlet hydraulic diameter of the nozzle connecting tube gradually increases from the control end to the extrusion end. The outlet of the nozzle connecting tube can be equipped with nozzles as needed. The structural dimensions of the air seal head are determined by the relative dimensions of the jacketed tube and the inner tube on the extrusion end side. The length, elasticity, and other parameters of the fixing spring are jointly determined by the inner cavity dimensions of the sleeve and the aluminum profile cooling object. The control mechanism can be used to control the feeding and rotation of the sleeve.

[0011] The jacketed tube is connected to the gas supply mechanism, the inner tube is connected to the liquid supply mechanism, the nozzle connecting tube is arranged at an angle with the inlet close to the extrusion end and the outlet close to the control end, the circumferentially adjacent nozzle connecting tubes are staggered in the axial direction, the fixing springs are circumferentially equidistant at each axial position of the sleeve, and the control mechanism is connected to the prime mover and speed changer for controlling the sleeve feed and rotation.

[0012] The length of the sleeve is determined according to the cutting length of the aluminum profile being cooled, and the inner diameter of the nozzle connecting pipe decreases from the inlet to the outlet.

[0013] The beneficial effects of this invention compared to the prior art are: The technical solution of this invention features a sleeve design that allows cooling medium to be delivered to any part of the aluminum profile's inner cavity, solving the cooling problem of the aluminum profile's inner cavity and its internal components. The nozzle connecting pipes are uniformly arranged circumferentially along the sleeve, and the control mechanism at the control end can control the sleeve's rotation, significantly improving the circumferential uniformity of cooling within the aluminum profile's inner cavity. The nozzle connecting pipes are equidistantly arranged axially along the sleeve, significantly improving the axial uniformity of cooling within the aluminum profile's inner cavity. Circumferentially adjacent nozzle connecting pipes are staggered axially, further enhancing both circumferential and axial cooling uniformity. The inlet hydraulic diameter of the nozzle connecting pipe gradually increases from the control end to the extrusion end, solving the problem of cooling the coolant in the inner layer... The uneven axial flow of the nozzle connecting pipe caused by friction resistance during the pipe transport process is addressed by ensuring consistent coolant flow from all nozzle connecting pipes, thus promoting axial uniformity of cooling. The reduced inner diameter of the nozzle connecting pipe from inlet to outlet helps reduce the resistance of coolant flowing from the inner pipe to the outside of the casing. The inclined arrangement of the gas seal head and nozzle connecting pipe, with the inlet close to the extrusion end and the outlet close to the control end, ensures that coolant and cooling gas do not flow back into the aluminum profile extrusion equipment after flowing out of the casing, thereby preventing heat treatment process failure. The cooling airflow drives the coolant flow, flowing outward along the inner wall of the aluminum profile, further improving the cooling intensity and uniformity of the aluminum profile's inner cavity. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a front view of the present invention.

[0016] Figure 2 This is a side view of the control terminal of the present invention.

[0017] Figure 3 This is a side view of the extrusion end of the present invention.

[0018] Figure 4 This is a three-dimensional view of the present invention.

[0019] In the diagram: 1. Sleeve; 11. Jacketed tube; 12. Inner tube; 13. Extrusion end; 14. Control end; 15. Control mechanism; 2. Nozzle connecting tube; 3. Gas seal head; 31. Cap; 32. Bend; 4. Fixed spring; 41. Fixed end; 42. Free end. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0021] Example like Figures 1-4 As shown, a cooler for cooling the inner cavity of an aluminum profile consists of a sleeve 1, a nozzle connecting pipe 2, an air seal head 3, and a fixing spring 4. The sleeve 1 consists of a jacketed pipe 11 and an inner pipe 12. Cooling gas flows through the jacketed pipe 11, and coolant flows through the inner pipe 12. One end of the sleeve 1 near the aluminum profile extrusion port is the extrusion end 13, and the other end is the control end 14. The control end 14 has a control mechanism 15.

[0022] Preferably, the sleeve 1 is a circular tube, and an annular channel is formed between the jacket tube 11 and the inner tube 12. The nozzle connecting tube 2 has a circular cross-section. The gas seal head 3 is located at the extrusion end 13. The inlets of cooling gas and coolant are located at the control end 14. The control mechanism 15 is a keyway with circumferentially symmetrical distribution. The effect is that the resistance of cooling gas and coolant flowing in the jacket tube 11 and the inner tube 12 of the sleeve 1 is small, the resistance in the nozzle connecting tube 2 is small, the cooling gas and coolant are convenient to deliver, the gas seal range covers the entire sleeve 1, and the control mechanism can control the entire sleeve 1 to perform feeding and rotational movements.

[0023] The inlet of the nozzle connecting pipe 2 is connected to the inside of the inner tube 12, and the outlet is connected to the outside of the sandwich tube 11. There are multiple nozzle connecting pipes 2, which are evenly arranged along the circumference of the sleeve 1 and equidistantly arranged along the axial direction of the sleeve 1. The inlet hydraulic diameter of the nozzle connecting pipe 2 changes monotonically along the direction from the control end 14 to the extrusion end 13.

[0024] Preferably, the nozzle connecting pipe 2 is connected to the inner layer pipe 12 and the sandwich pipe 11 by welding or 3D printing. The inlet of the nozzle connecting pipe 2 is flush with the inner wall of the inner layer pipe 12, and the outlet of the nozzle connecting pipe 2 protrudes from the outer wall of the sandwich pipe 11 and is threaded. Four nozzle connecting pipes 2 are arranged at equal angles along the circumference of the sleeve 1. The hydraulic diameter of the inlet of the nozzle connecting pipe 2 increases monotonically along the direction from the control end 14 to the extrusion end 13. The effect is that the nozzle connecting pipe 2 will not interfere with the flow of coolant in the inner layer pipe 12 at its inlet. Various nozzles can be easily installed at the outlet of the nozzle connecting pipe 2. The coolant flowing out from the nozzle connecting pipe 2 can form a good cooling coverage in both the circumference and axial direction of the inner wall of the aluminum profile. The flow rate of the coolant flowing out from the nozzle connecting pipe 2 along the axial direction is uniform.

[0025] The gas seal head 3 is located at the extrusion end 13 and consists of a cover 31 and a bend 32. The cover 31 seals the inner tube 12, and the bend 32 is connected to the jacket tube 11. The cooling gas passes through the jacket tube 11 and the bend 32 in sequence and enters the outside of the sleeve 1 from the outlet of the bend 32.

[0026] Preferably, the gas seal head 3 is a flat-headed cone with a cone angle of 45°. The upper surface is exactly the cover 31, and the lower surface has an annular outlet that is exactly the outlet of the bend 32. The effect is that the coolant flows in the inner tube 12 to the extrusion end 13 and is blocked by the cover 31. When the cooling gas flows in the jacket tube 11 to the extrusion end 13, it is deflected 180° under the guidance of the bend 32 and flows out from the annular outlet. The outflow direction is towards the control end 14, forming a gas seal against the liquid outside the sleeve, while maintaining a low airflow resistance of the gas seal head 3.

[0027] One end of the fixed spring 4 is the fixed end 41, which is connected to the outer wall of the jacket tube 11. The other end of the fixed spring 4 is the free end 42, which abuts against the inner cavity surface of the aluminum profile when the cooler is working. There are multiple fixed springs 4, which are evenly arranged along the sleeve 1.

[0028] Preferably, the fixed end 41 of the fixed spring 4 is welded and fixed to the outer wall surface of the sandwich tube 11. The natural length from the fixed end 41 to the free end 42 of the fixed spring 4 is greater than the distance between the outer wall surface of the sandwich tube 11 and the inner cavity surface of the aluminum profile. Eight fixed springs 4 are evenly distributed circumferentially along the sleeve 1. Fixed springs 4 are evenly distributed axially between the extrusion end 13 and the control end 14 of the sleeve 1. The effect is that no radial relative displacement occurs between the fixed spring 4 and the aluminum profile. Moreover, this limiting mechanism occurs in all axial positions of the sleeve 1, further ensuring that the cooler and the aluminum profile body do not touch, thus providing a guarantee for the implementation of cooling.

[0029] The lengths of the jacketed tube 11 and the inner tube 12 are matched according to the supply method of cooling gas and coolant. The inlet hydraulic diameter of the nozzle connecting pipe 2 gradually increases along the direction from the control end 14 to the extrusion end 13. The outlet of the nozzle connecting pipe 2 can be equipped with a nozzle as needed. The structural dimensions of the air seal head 3 are determined by the relative dimensions of the jacketed tube 11 and the inner tube 12 on the side of the extrusion end 13. The length, elasticity and other parameters of the fixing spring 4 are jointly determined by the inner cavity dimensions of the sleeve 1 and the aluminum profile cooling object. The control mechanism 15 can be used to control the feeding and rotation of the sleeve 1.

[0030] Preferably, on the control end 14 side, the inner tube 12 is longer than the sandwich tube 11, the inlet hydraulic diameter of the nozzle connecting tube 2 increases in an inverted parabolic shape along the direction from the control end 14 to the extrusion end 13, the outlet of the nozzle connecting tube 2 is threaded, the width of the annular channel of the air seal head 3 is equal to the width of the sandwich tube 11, the natural length of the fixing spring 4 is greater than the distance between the outer wall surface of the sandwich tube 11 and the inner cavity surface of the aluminum profile, and its natural length is made as long as possible while ensuring that the minimum length after compression is less than this distance. The control mechanism 15 is provided with... The four circumferentially equidistant keyways on the sandwich tube 11 facilitate the installation of external cooling air and coolant supply systems, adapt to the nonlinear and gradual distribution of total pressure changes inside the inner tube 12 under the influence of coolant outflow, minimize the energy consumption of the coolant supply inside the inner tube 12, facilitate the installation of nozzles at the outlet end of the nozzle connection pipe 2, reduce the flow resistance inside the air seal head 3, and enable the fixing spring 4 to adapt to the cooling requirements of various aluminum profiles of different specifications and sizes, thereby improving the versatility of the cooler and facilitating the control of the cooler's feed and rotation.

[0031] The jacketed tube 11 is connected to the gas supply mechanism, the inner tube 12 is connected to the liquid supply mechanism, the nozzle connecting tube 2 is arranged at an angle with the inlet close to the extrusion end 13 and the outlet close to the control end 14, the circumferentially adjacent nozzle connecting tubes 2 are arranged in an axially staggered manner, the fixing springs 4 are circumferentially equidistant at each axial position of the sleeve 1, and the control mechanism 15 is connected to the prime mover and speed changer for controlling the feed and rotation of the sleeve.

[0032] Optionally, the nozzle connecting pipe 2 has an inclination angle of 45°, and the circumferentially adjacent nozzle connecting pipes 2 are staggered and equidistant in the axial direction. The fixing spring 4 is arranged 8 times circumferentially at each axial position of the sleeve 1 with an interval angle of 45°. The control mechanism consists of 4 circumferentially equidistant keyways with an interval angle of 90°, which are connected to the gearbox and motor through 4 control rods respectively. The effect is to strengthen the prevention of coolant outside the sleeve 1 from flowing to the extrusion end 13, increase the radial fixing strength of the cooler, ensure that no radial relative displacement occurs in any direction, and facilitate the control of the feed and rotation of the cooler.

[0033] The length of the sleeve 1 is determined according to the cutting length of the aluminum profile to be cooled. The inner diameter of the nozzle connecting pipe 2 decreases from the inlet to the outlet. Preferably, the length of the sleeve 1 is larger than the cutting length of the aluminum profile to be cooled. The difference between the two is sufficient to install the liquid supply, gas supply and motion control mechanism. The inside of the nozzle connecting pipe 2 is a tapered tapered tube with a cone angle of 15° to 60°. The effect is to improve the spatial integration of the aluminum profile internal cavity cooler and reduce the flow resistance of the coolant inside the nozzle connecting pipe 2.

[0034] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that the accompanying drawings do not represent the actual proportions of the aluminum profile internal cooler of the present invention, but are only a structural representation for ease of understanding. In actual application of the present invention, the feed length of the cooler should be adjusted according to the size of the object being cooled, thereby changing the size proportions accordingly. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A cooler for cooling the inner cavity of aluminum profiles, comprising a sleeve (1), a nozzle connecting pipe (2), an air seal head (3), and a fixing spring (4), characterized in that: The sleeve (1) is composed of a sandwich tube (11) and an inner tube (12). Cooling gas is passed through the sandwich tube (11) and cooling liquid is passed through the inner tube (12). One end of the sleeve (1) near the aluminum profile extrusion port is the extrusion end (13), and the other end is the control end (14). The control end (14) has a control mechanism (15).

2. The inlet of the nozzle connecting pipe (2) is connected to the inside of the inner tube (12), and the outlet is connected to the outside of the sandwich tube (11). There are multiple nozzle connecting pipes (2), which are evenly arranged along the circumference of the sleeve (1) and equidistantly arranged along the axial direction of the sleeve (1). The inlet hydraulic diameter of the nozzle connecting pipe (2) changes monotonically along the direction from the control end (14) to the extrusion end (13). The gas seal head (3) is located at the extrusion end (13) and is composed of a cap (31) and a bend (32). The cap (31) closes the inner tube (12), and the bend (32) is connected to the interlayer tube (11). Cooling gas passes through the interlayer tube (11) and the bend (32) in sequence and enters the outside of the sleeve (1) from the outlet of the bend (32). One end of the fixed spring (4) is a fixed end (41), which is connected to the outer wall of the sandwich tube (11). The other end of the fixed spring (4) is a free end (42), which abuts against the inner surface of the aluminum profile when the cooler is working. There are multiple fixed springs (4), which are evenly arranged along the sleeve (1).

3. A cooler for cooling the inner cavity of aluminum profiles as described in claim 1, characterized in that: The lengths of the jacketed tube (11) and the inner tube (12) are matched according to the supply method of cooling gas and cooling liquid. The inlet hydraulic diameter of the nozzle connecting tube (2) gradually increases along the direction from the control end (14) to the extrusion end (13). The nozzle connecting tube (2) can be equipped with a nozzle as needed. The structural dimensions of the air seal head (3) are determined by the relative dimensions of the jacketed tube (11) and the inner tube (12) on the side of the extrusion end (13). The length, elasticity and other parameters of the fixed spring (4) are jointly determined by the inner cavity dimensions of the sleeve (1) and the aluminum profile cooling object. The control mechanism (15) can be used to control the feeding and rotation of the sleeve (1).

4. A cooler for cooling the inner cavity of aluminum profiles as described in claim 2, characterized in that: The jacketed tube (11) is connected to the gas supply mechanism, the inner tube (12) is connected to the liquid supply mechanism, the nozzle connecting tube (2) is arranged at an angle with the inlet close to the extrusion end (13) and the outlet close to the control end (14), the circumferentially adjacent nozzle connecting tubes (2) are arranged in an axially staggered manner, the fixing spring (4) is arranged circumferentially at equal intervals at each axial position of the sleeve (1), and the control mechanism (15) is connected to the prime mover and speed changer for controlling the feeding and rotation of the sleeve.

5. A cooler for cooling the inner cavity of aluminum profiles as described in claim 3, characterized in that: The length of the sleeve (1) is determined according to the cutting length of the aluminum profile to be cooled, and the inner diameter of the nozzle connecting pipe (2) decreases from the inlet to the outlet.

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