Aluminum alloy isothermal extrusion device capable of efficiently recovering waste heat

Abstract

The efficient waste heat recovery aluminum alloy isothermal extrusion device comprises a base plate, an extrusion rod mechanism is arranged at the top of the base plate, two linear motors are further arranged at the top of the base plate, the same feeding ingot is arranged at the tops of the two linear motors, and the feeding ingot is matched with the extrusion rod mechanism; the mold energy recovery mechanism is fixedly arranged at the top of the base plate through supporting legs, and the mold energy recovery mechanism is matched with the extrusion rod mechanism; and the cooling liquid energy recovery mechanism is arranged at the tail of the mold energy recovery mechanism, and a protection box is arranged at the top of the base plate. According to the device, efficient heat energy recovery is achieved, through two-stage heat energy recovery (extrusion friction heat of 560 DEG C and cooling waste heat), a phase change heat accumulator (NaNO-KNOsalt) is driven to store heat energy, a mold is continuously preheated through closed-loop circulation, extrusion at the constant temperature of 480 DEG C is maintained, power consumption of a resistor is reduced, waste heat emission is reduced, and green manufacturing with the energy efficiency utilization rate is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy extrusion processing, and in particular to an aluminum alloy isothermal extrusion device with high-efficiency waste heat recovery. Background Art

[0002] Aluminum alloys are widely used in our daily lives. As society progresses, the performance of aluminum alloys is improving. Advanced nonferrous metals are being used to manufacture aluminum alloys. These metals offer advantages such as high strength, high toughness, high temperature resistance, corrosion resistance, lightweight, special electromagnetic properties, memory properties, and superconductivity, which enhance the performance of aluminum alloys. Aluminum alloy processing involves heating, loading, extrusion, and cooling.

[0003] Aluminum alloy profiles are the most widely used advanced non-ferrous metal structural materials in industry. Aluminum alloy profiles have been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, construction and chemical industries. During the production and processing of aluminum alloy profiles, extrusion devices are usually used to extrude the aluminum alloy profiles to make them into the required shape.

[0004] Publication (Announcement) No.: CN113877976B discloses an isothermal variable speed extrusion device for aluminum alloy profiles and an extrusion method thereof, which relates to the technical field of extrusion device structure, and is intended to solve the problem that the aluminum alloy profiles are easily difficult to extrude due to cooling during the extrusion process of existing aluminum alloy profiles, thereby affecting the extrusion effect. An extrusion device seat is installed above the stable base, a fixed mounting seat is installed at one end of the extrusion device seat, a hydraulic cylinder is installed at one end of the fixed mounting seat, a movable extrusion seat is installed on one side of the fixed mounting seat, and limiting slide rails are installed on both sides of the movable extrusion seat, a push rod is installed on one side of the movable extrusion seat, a heat preservation placement device is installed on one side of the push rod, a spiral heating tube is installed inside the heat preservation placement device, an extrusion molding device is installed on one side of the heat preservation placement device, a forming die seat is provided at one end of the extrusion molding device, and a cylinder is installed on both sides of the extrusion molding device.

[0005] Isothermal extrusion of aluminum alloys requires the mold to be maintained at 480±20℃. Traditional technology has two major defects: high energy consumption in aluminum alloy processing: resistance heating accounts for 60% of production energy consumption, and the extrusion barrel generates about 560℃ radiant heat that is not recovered, and the heat energy of water cooling cannot be recycled, resulting in heat energy loss. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the present invention provides a high-efficiency waste heat recovery aluminum alloy isothermal extrusion device. Traditional technology has two major defects: high energy consumption in aluminum alloy processing, about 560°C radiant heat generated by extrusion of the extrusion barrel is not recovered, and the heat energy of water cooling cannot be recycled, resulting in heat energy loss.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: An efficient waste heat recovery aluminum alloy isothermal extrusion device, comprising: A base plate, an extrusion rod mechanism is provided on the top of the base plate, two linear motors are also provided on the top of the base plate, and a same feeding ingot is provided on the top of the two linear motors, and the feeding ingot cooperates with the extrusion rod mechanism; The mold energy recovery mechanism is fixed on the top of the base plate through the support legs, and the mold energy recovery mechanism cooperates with the extrusion rod mechanism; The coolant energy recovery mechanism is arranged at the tail of the mold energy recovery mechanism. A protection box is arranged on the top of the base plate. The coolant energy recovery mechanism cooperates with the protection box. A top cover is arranged on the top of the protection box.

[0008] Preferably, the extrusion rod mechanism includes a vertical plate, which is fixedly mounted on the top of the base plate, with an oblique support fixedly mounted between the vertical plate and the base plate, a hydraulic cylinder fixedly mounted on the vertical plate, an extrusion head mounted on the output shaft of the hydraulic cylinder, and the extrusion head cooperates with the loading ingot.

[0009] Preferably, the mold energy recovery mechanism includes a rectangular column, which is fixedly mounted on the top of the base plate, a titanium nitride layer is provided at the center of the rectangular column, the rectangular column is a hollow structure, an extrusion cylinder is fixedly mounted inside the rectangular column, a mold mounting plate is fixedly mounted on the inner side of the extrusion cylinder, an electric heating cylinder is fixedly mounted inside the mold mounting plate, a mold heating sleeve is fixedly mounted inside the electric heating cylinder, a mold is fixedly mounted inside the mold heating sleeve, and a sealing disk is fixedly mounted on the outer side of the mold mounting plate.

[0010] Preferably, an energy recovery tube is embedded in the outer side of the extrusion cylinder, a heat energy utilization tube is embedded in the outer side of the mold heating sleeve, one end of the heat energy utilization tube is connected to one end of the energy recovery tube, a mold hole is provided on the inner side of the mold, a mounting plate is fixedly installed on the right side of the mold, and a mounting groove is provided on the right side of the mold heating sleeve, and the mounting plate cooperates with the mounting groove and is fixed by bolts.

[0011] Preferably, a resistor is embedded in the outer side of the electric heating tube, and the electric heating tube is made of magnesium oxide insulating material.

[0012] Preferably, the mold mounting plate is provided with three screw positioning slots, the side of the sealing plate is connected with three mounting screws, the three mounting screws cooperate with the three screw positioning slots, and the sealing plate is provided with a mold matching hole, which cooperates with the mold hole.

[0013] Preferably, a heat energy circulation mechanism is connected between the other end of the heat energy utilization pipe and the other end of the energy recovery pipe. The heat energy circulation mechanism includes a variable frequency oil pump, which is installed on the top of the top cover. An energy supply pipe is connected between the outlet of the variable frequency oil pump and the other end of the heat energy utilization pipe. The inlet of the variable frequency oil pump is connected to an energy collection pipe. The energy collection pipe is connected to a phase change heat accumulator. The phase change heat accumulator is located inside the protective box. A recovery pipe is connected to the phase change heat accumulator. The recovery pipe is connected to the other end of the energy recovery pipe. The energy recovery pipe and the phase change heat accumulator are both filled with phase change material, which is NaNO3-KNO3 salt.

[0014] Preferably, the coolant energy recovery mechanism includes a hollow cooling plate, three welding rods are fixedly installed on the right side of the hollow cooling plate, and the three welding rods are fixedly installed on the left side of the rectangular column. A material outlet hole is opened on the hollow cooling plate, and the material outlet hole is connected to the mold matching hole. A nozzle is obliquely arranged on the top of the hollow cooling plate, and the inlet of the nozzle is connected to a liquid supply pipe, and the liquid supply pipe is connected to a liquid pump. A bent pipe is connected between the inlet of the liquid pump and the protective box, and the bottom side of the hollow cooling plate is connected to a return pipe, and the return pipe is connected to the top side of the protective box.

[0015] Preferably, the outer sides of the energy supply pipe, recovery pipe, liquid supply pipe and reflux pipe are all covered with insulation sleeves.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the combination of heat recovery tube and phase change material (such as NaNO3-KNO3 salt), the friction heat of the extruder barrel (560℃) and the waste heat of the coolant are recovered to preheat the mold (target 480℃), reducing the power consumption of the resistor and reducing the overall operating cost.

[0017] 2. The synergistic effect of the mold heating jacket and the heat energy utilization tube, combined with the dynamic control of the variable frequency oil pump, ensures that the mold temperature is constant within the range of 480°C, avoiding the problem of uneven aluminum alloy grains caused by temperature fluctuations in traditional extrusion, and achieving efficient isothermal extrusion. Improve product consistency and mechanical properties.

[0018] 3. Use phase change heat accumulators (such as NaNO3-KNO3 salt) to store thermal energy in a high-density manner in the form of solid-liquid phase change (energy density reaches 200-300 kJ / kg), and realize closed-loop utilization of thermal energy through a circulation system, thereby reducing industrial waste heat emissions by about 10%, and achieving a high waste heat recovery rate.

[0019] 4. The coolant mechanism (such as the nozzle and return pipe) guides the heated coolant into the protective box while spraying to cool down, thereby increasing the temperature inside the box, reducing the heat loss of the phase change material, realizing secondary energy recovery in the cooling stage, and integrating cooling and heat energy recovery.

[0020] 5. The application of titanium nitride layer (anti-wear) and magnesium oxide insulation material (electric heating tube), combined with thermal energy circulation, reduces thermal stress, reduces the loss of mold and extrusion tube, and extends the service life of the equipment.

[0021] 6. Modular design (such as the screw positioning slots of the sealing plate and the mold mounting plate) simplifies maintenance, and the insulation sleeve (covering the pipe) ensures efficient heat transfer and reduces on-site failure rate.

[0022] 7. Mold radiant heat → heat pipe → heat accumulator → oil pump → mold coil self-circulates to recover radiant heat; The present invention efficiently recovers heat through two-stage heat recovery (extrusion friction heat of 560°C + cooling waste heat), drives the phase change heat accumulator (NaNO3-KNO3 salt) to store heat energy, continuously preheats the mold through a closed-loop cycle, maintains a constant extrusion temperature of 480°C, reduces resistor power consumption, reduces waste heat emissions, and achieves green manufacturing with high energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 For the present invention Figure 1 Schematic diagram of the disassembly of the coolant recovery mechanism; Figure 4 For the present invention Figure 3 A side structural diagram of Figure 5 This is a partial structural diagram of the mold energy recovery mechanism of the present invention; Figure 6 For the present invention Figure 5 A side structural diagram of Figure 7 Schematic diagram of the cross-sectional structure of the mold energy recovery mechanism of the present invention; Figure 8 Schematic diagram of the explosion structure of the mold energy recovery mechanism of the present invention; Figure 9 For the present invention Figure 8 A side structural diagram of Figure 10 This is a schematic structural diagram of the base plate, vertical plate, protection box and related parts of the present invention; Figure 11 This is a schematic structural diagram of the hollow cooling plate, liquid supply pipe, return pipe and related parts of the present invention; Figure 12 It is a side view structural diagram of the hollow cooling plate, liquid supply pipe, return pipe and related parts of the present invention; Figure 13This is a block diagram of the power-on working principle of the present invention.

[0024] Wherein: 1. Base plate; 2. Extrusion rod mechanism; 21. Vertical plate; 22. Hydraulic cylinder; 23. Extrusion head; 24. Diagonal brace; 3. Loading ingot; 31. Linear motor; 4. Mold energy recovery mechanism; 41. Rectangular column; 411. Titanium nitride layer; 42. Extrusion cylinder; 421. Energy recovery tube; 43. Mold mounting plate; 431. Screw positioning slot; 432. Mold extrusion hole; 44. Mold; 441. Mounting plate; 442. Mold hole; 45. Mold heating sleeve; 451. Heat energy utilization tube; 452. Mounting slot; 46. Electric heating cylinder; 461. Resistor; 47. Sealing plate; 471. Mold mating hole; 472. Mounting screws; 5. Protective box; 51. Top cover; 6. Heat energy circulation mechanism; 61. Variable frequency oil pump; 62. Energy supply pipe; 63. Energy collection pipe; 64. Recovery pipe; 65. Phase change heat accumulator; 7. Coolant recovery mechanism; 71. Hollow cooling plate; 72. Liquid pump; 73. Elbow pipe; 74. Liquid supply pipe; 75. Nozzle; 76. Return pipe; 77. Material outlet hole; 78. Welding rod. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the embodiments, other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels. Example

[0026] like Figures 1-13 As shown, the present invention provides a high-efficiency waste heat recovery aluminum alloy isothermal extrusion device, including a base plate 1, a mold energy recovery mechanism 4 and a coolant energy recovery mechanism 7. An extrusion rod mechanism 2 is provided on the top of the base plate 1, and two linear motors 31 are also provided on the top of the base plate 1. The top of the two linear motors 31 is provided with the same feeding ingot 3, which cooperates with the extrusion rod mechanism 2. The mold energy recovery mechanism 4 is fixed on the top of the base plate 1 through support legs, and the mold energy recovery mechanism 4 cooperates with the extrusion rod mechanism 2. The coolant energy recovery mechanism 7 is provided at the tail of the mold energy recovery mechanism 4. A protective box 5 is provided on the top of the base plate 1, and the coolant energy recovery mechanism 7 cooperates with the protective box 5. The top of the protective box 5 is provided with a top cover 51.

[0027] Specifically, the base plate 1 ensures stability through the diagonal brace 24; the hydraulic cylinder 22 of the extrusion rod mechanism 2 drives the extrusion head 23 to push the aluminum material into the mold; two linear motors 31 adjust the height of the loading ingot 3 to achieve precise alignment and fast loading.

[0028] like Figures 1-4 As shown, in this embodiment, the extrusion rod mechanism 2 includes a vertical plate 21, which is fixedly mounted on the top of the base plate 1, and a diagonal support 24 is fixedly mounted between the vertical plate 21 and the base plate 1. A hydraulic cylinder 22 is fixedly mounted on the vertical plate 21, and an extrusion head 23 is mounted on the output shaft of the hydraulic cylinder 22, and the extrusion head 23 cooperates with the loading ingot 3.

[0029] like Figure 8 、 Figure 9 As shown, in this embodiment, the mold energy recovery mechanism 4 includes a rectangular column 41, which is fixedly mounted on the top of the base plate 1. A titanium nitride layer 411 is provided at the center of the rectangular column 41. The rectangular column 41 is a hollow structure. An extrusion cylinder 42 is fixedly mounted in the rectangular column 41. A mold mounting disk 43 is fixedly mounted on the inner side of the extrusion cylinder 42. An electric heating cylinder 46 is fixedly mounted in the mold mounting disk 43. A mold heating sleeve 45 is fixedly mounted in the electric heating cylinder 46. A mold 44 is fixedly mounted in the mold heating sleeve 45. A sealing disk 47 is fixedly mounted on the outer side of the mold mounting disk 43.

[0030] like Figure 5-Figure 9 As shown, in this embodiment, an energy recovery tube 421 is embedded in the outer side of the extrusion cylinder 42, and a heat energy utilization tube 451 is embedded in the outer side of the mold heating sleeve 45. One end of the heat energy utilization tube 451 is connected to one end of the energy recovery tube 421. A mold hole 442 is provided on the inner side of the mold 44, and a mounting plate 441 is fixedly installed on the right side of the mold 44. A mounting groove 452 is provided on the right side of the mold heating sleeve 45. The mounting plate 441 cooperates with the mounting groove 452 and is fixed by bolts.

[0031] like Figure 7-Figure 9 As shown, in this embodiment, a resistor 461 is embedded in the outer side of the electric heating tube 46, and the electric heating tube 46 is made of magnesium oxide insulating material.

[0032] Specifically, the thermal conductivity of the magnesium oxide layer 46 is 0.5 W / (m·K), and the breakdown voltage is 15 kV. The resistor 461 has a buried depth of 25 mm and a power of 30 kW.

[0033] like Figure 8 、 Figure 9As shown, in this embodiment, three screw positioning grooves 431 are provided on the mold mounting plate 43, and three mounting screws 472 are connected to the side of the sealing plate 47. The three mounting screws 472 cooperate with the three screw positioning grooves 431. A mold matching hole 471 is provided on the sealing plate 47. The mold matching hole 471 cooperates with the mold type hole 442. The sealing plate 47 is disassembled for easy replacement and maintenance.

[0034] like Figure 3 、 Figure 4 、 Figure 10 As shown, in this embodiment, a heat energy circulation mechanism 6 is connected between the other end of the heat energy utilization pipe 451 and the other end of the energy recovery pipe 421. The heat energy circulation mechanism 6 includes a variable frequency oil pump 61, which is installed on the top of the top cover 51. An energy supply pipe 62 is connected between the outlet of the variable frequency oil pump 61 and the other end of the heat energy utilization pipe 451. The inlet of the variable frequency oil pump 61 is connected to an energy collection pipe 63. The energy collection pipe 63 is connected to a phase change heat accumulator 65. The phase change heat accumulator 65 is located inside the protection box 5. The phase change heat accumulator 65 is connected to a recovery pipe 64. The recovery pipe 64 is connected to the other end of the energy recovery pipe 421. The energy recovery pipe 421 and the phase change heat accumulator 65 are both filled with phase change material, which is NaNO3-KNO3 salt.

[0035] Specifically, the die is heated and waste heat from the extrusion process is recovered. A wear-resistant titanium nitride layer 411 is embedded within the rectangular column 41. The extrusion barrel 42 and die 44 form an extrusion channel, with an internal energy recovery tube 421 absorbing 560°C of frictional heat from the aluminum. An electric heating tube 46 provides initial heating via a resistor 461, while the die heating jacket 45 and heat recovery tube 451 transfer the recovered heat to maintain a constant die temperature.

[0036] Key function: Through embedded pipes and phase change materials, heat energy is directly captured and transferred to the phase change heat accumulator 65 to achieve in-situ heat recovery.

[0037] The variable frequency oil pump 61 drives the phase change material NaNO3-KNO3 salt to flow; the energy supply pipe 62 and the energy collection pipe 63 connect the energy recovery pipe 421 and the heat energy utilization pipe 451, and transport the heat energy from the heat accumulator 65 to the mold heating sleeve 45; the recovery pipe 64 completes the closed loop.

[0038] Frequency conversion oil pump 61: flow rate 20-200L / min, pressure 0.8MPa.

[0039] Working principle: When in use, power is turned on, and the resistor 461 works to convert electrical energy into heat energy, heating the mold 44. After heating to 480°C, the heated aluminum material is placed inside the loading ingot 3. The height of the loading ingot 3 is adjusted by two linear motors 31 so that the loading ingot 3 is aligned with the inner side of the rectangular column 41. The hydraulic cylinder 22 works to push the extrusion head 23 to move. The extrusion head 23 extrude the aluminum material and extrude the profile through the mold extrusion hole 432 and the mold profile hole 442. The extruded material is discharged through the mold matching hole 471. During the extrusion process, the aluminum material is rubbed and squeezed against the inner wall of the extrusion cylinder 42, and the heat radiation heating temperature reaches 560°C. The heat is absorbed by the energy recovery pipe 421 and the phase change material inside it. The phase change material absorbs heat and melts, heating the inside of the phase change heat accumulator 65, causing a solid-liquid phase change, and storing heat energy at a high density. The frequency conversion oil pump 61 works, and the phase change material is introduced into the heat energy utilization pipe 451 through the energy collection pipe 63 and the energy supply pipe 62, heating the mold heating sleeve 45, and conducting heat energy to the mold 44 to ensure that the mold 44 is in the range of 480°C. The power of the resistor 461 is reduced, and the heat energy is recovered and utilized to reduce power loss. The phase change material inside the heat energy utilization pipe 451 flows back to the energy recovery pipe 421 under the pressurized action of the frequency conversion oil pump 61, enters the heat energy and reabsorbs it, forming a heat energy cycle absorption and utilization.

[0040] Specifically, the total heat loss of the mold calculate:

[0041] V: extrusion speed (mm / s) T target : Target temperature (480℃) T real : Real-time temperature Heat source compensation distribution principle: Pipeline heating capacity:

[0042] Resistor heat supply:

[0043] More specifically, the friction heat power Q of the extrusion cylinder 42 friction =μ×F n ×v μ: Aluminum-extrusion cylinder friction coefficient (0.4-0.6) F n : Locking force (typical value 20MPa×contact area) v: extrusion speed (3-10mm / s) Example calculation: Die diameter 300mm → contact area A = π × 300 × 50 = 47,124mm² F n =20MPa×0.047124m²=942.5kN Q friction n=0.5×942.5×0.005=2.36kW (at a speed of 5mm / s) Local temperature rise:

[0044] (h is the heat transfer coefficient) → superimposed initial 480℃ → peak 558.7℃ (actually measured up to 560℃). Example

[0045] like Figure 1 、 Figure 2 、 Figure 10-12 As shown, this embodiment is further optimized on the basis of the embodiment 1, and the same parts as the above technical solutions will not be repeated here. In order to better implement the present invention, the following setting is particularly adopted: In this embodiment, as Figure 1 、 Figure 2 、 Figure 10-12 As shown, in this embodiment, the coolant energy recovery mechanism 7 includes a hollow cooling plate 71, three welding rods 78 are fixedly installed on the right side of the hollow cooling plate 71, and the three welding rods 78 are fixedly installed on the left side of the rectangular column 41. A material outlet hole 77 is opened on the hollow cooling plate 71, and the material outlet hole 77 is connected to the mold matching hole 471. A nozzle 75 is obliquely arranged on the top of the hollow cooling plate 71, and the inlet of the nozzle 75 is connected to a liquid supply pipe 74, and the liquid supply pipe 74 is connected to a liquid pump 72. The inlet of the liquid pump 72 is connected to the protective box 5 by a curved pipe 73, and the bottom side of the hollow cooling plate 71 is connected to a return pipe 76, and the return pipe 76 is connected to the top side of the protective box 5.

[0046] Specifically, the hollow cooling plate 71 receives the extruded aluminum alloy through the material outlet 77; the liquid pump 72 draws the cooling liquid from the protection box 5, and sprays it through the liquid supply pipe 74 and the nozzle 75 to cool it down; the reflux pipe 76 returns the heated liquid to the protection box to preheat the environment inside the box.

[0047] Key function: The spray cooling rate of 50-100℃ / s is synchronized with waste heat recovery, which increases the temperature of the protection box and reduces the energy consumption of phase change material insulation.

[0048] like Figure 10-12 As shown, in this embodiment, the outer sides of the energy supply pipe 62 , the recovery pipe 64 , the liquid supply pipe 74 and the return pipe 76 are all covered with thermal insulation sleeves.

[0049] Specifically, the protective box 5 accommodates the phase change heat accumulator 65 and the coolant storage; the top cover 51 integrates the variable frequency oil pump 61; and the insulation sleeve covers the energy supply pipe 62, the recovery pipe 64 and other pipes to reduce heat loss.

[0050] In this embodiment, the working mode is that the aluminum alloy material enters the interior of the hollow cooling plate 71 after extrusion, and the solution is stored inside the protection box 5. The liquid pump 72 works to send the solution into the liquid supply pipe 74 through the bend pipe 73, and then sprays it obliquely to the surface of the aluminum alloy through the nozzle 75, so as to preliminarily cool the aluminum alloy and recover the heat energy. After the solution is heated, it flows back to the interior of the protection box 5 through the reflux pipe 76, thereby increasing the internal temperature of the protection box 5 and reducing the heat energy loss of the phase change material such as the phase change heat accumulator 65. The hydraulic cylinder 22 drives the extrusion head 23 to reset and continue processing, monitors the mold temperature, maintains isothermal processing of the mold, and efficiently recovers the waste heat.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An efficient waste heat recovery aluminum alloy isothermal extrusion device, characterized by: include: A base plate (1), an extrusion rod mechanism (2) is provided on the top of the base plate (1), two linear motors (31) are also provided on the top of the base plate (1), a same loading ingot (3) is provided on the top of the two linear motors (31), and the loading ingot (3) cooperates with the extrusion rod mechanism (2); A mold energy recovery mechanism (4) is fixedly arranged on the top of the base plate (1) via supporting legs, and the mold energy recovery mechanism (4) cooperates with the extrusion rod mechanism (2); The coolant energy recovery mechanism (7) is arranged at the tail of the mold energy recovery mechanism (4); a protection box (5) is arranged on the top of the base plate (1); the coolant energy recovery mechanism (7) cooperates with the protection box (5); and a top cover (51) is arranged on the top of the protection box (5).

2. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 1 is characterized in that: The extrusion rod mechanism (2) includes a vertical plate (21), the vertical plate (21) is fixedly mounted on the top of the base plate (1), a diagonal brace (24) is fixedly mounted between the vertical plate (21) and the base plate (1), a hydraulic cylinder (22) is fixedly mounted on the vertical plate (21), an extrusion head (23) is mounted on the output shaft of the hydraulic cylinder (22), and the extrusion head (23) cooperates with the loading ingot (3).

3. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 1 is characterized in that: The mold energy recovery mechanism (4) comprises a rectangular column (41), the rectangular column (41) being fixedly mounted on the top of the base plate (1), a titanium nitride layer (411) being provided at the center of the rectangular column (41), the rectangular column (41) being a hollow structure, an extrusion cylinder (42) being fixedly mounted inside the rectangular column (41), a mold mounting plate (43) being fixedly mounted inside the extrusion cylinder (42), an electric heating cylinder (46) being fixedly mounted inside the mold mounting plate (43), a mold heating sleeve (45) being fixedly mounted inside the electric heating cylinder (46), a mold (44) being fixedly mounted inside the mold heating sleeve (45), and a blocking plate (47) being fixedly mounted outside the mold mounting plate (43).

4. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 3 is characterized in that: An energy recovery pipe (421) is embedded in the outer side of the extrusion cylinder (42), and a heat energy utilization pipe (451) is embedded in the outer side of the mold heating sleeve (45). One end of the heat energy utilization pipe (451) is connected to one end of the energy recovery pipe (421).

5. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 3 is characterized in that: A mold hole (442) is provided on the inner side of the mold (44), a mounting plate (441) is fixedly mounted on the right side of the mold (44), a mounting groove (452) is provided on the right side of the mold heating sleeve (45), and the mounting plate (441) and the mounting groove (452) are matched and fixed by bolts.

6. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 3 is characterized in that: A resistor (461) is embedded in the outer side of the electric heating tube (46), and the electric heating tube (46) is made of magnesium oxide insulating material.

7. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 3 is characterized in that: The mold mounting plate (43) is provided with three screw positioning grooves (431), and the side of the blocking plate (47) is connected with three mounting screws (472), and the three mounting screws (472) match the three screw positioning grooves (431). The blocking plate (47) is provided with a mold matching hole (471), and the mold matching hole (471) matches the mold hole (442).

8. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 4, characterized in that: A heat energy circulation mechanism (6) is connected between the other end of the heat energy utilization pipe (451) and the other end of the energy recovery pipe (421). The heat energy circulation mechanism (6) includes a variable frequency oil pump (61). The variable frequency oil pump (61) is installed on the top of the top cover (51). An energy supply pipe (62) is connected between the outlet of the variable frequency oil pump (61) and the other end of the heat energy utilization pipe (451). The inlet of the variable frequency oil pump (61) is connected to an energy collection pipe (63). The energy collection pipe (63) is connected to a phase change heat accumulator (65). The phase change heat accumulator (65) is located inside the protection box (5). The phase change heat accumulator (65) is connected to a recovery pipe (64). The recovery pipe (64) is connected to the other end of the energy recovery pipe (421). The energy recovery pipe (421) and the phase change heat accumulator (65) are both filled with phase change material, and the phase change material is NaNO3-KNO3 salt.

9. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 3, characterized in that: The cooling liquid energy recovery mechanism (7) comprises a hollow cooling plate (71), three welding rods (78) are fixedly mounted on the right side of the hollow cooling plate (71), the three welding rods (78) are fixedly mounted on the left side of the rectangular column (41), a material outlet hole (77) is provided on the hollow cooling plate (71), the material outlet hole (77) is connected to the mold matching hole (471), a nozzle (75) is tiltedly arranged on the top of the hollow cooling plate (71), the inlet of the nozzle (75) is connected to a liquid supply pipe (74), the liquid supply pipe (74) is connected to a liquid pump (72), the inlet of the liquid pump (72) is connected to the protection box (5) by a curved pipe (73), the bottom side of the hollow cooling plate (71) is connected to a return pipe (76), and the return pipe (76) is connected to the top side of the protection box (5).

10. The high-efficiency waste heat recovery aluminum alloy isothermal extrusion device according to claim 9, characterized in that: The energy supply pipe (62), the recovery pipe (64), the liquid supply pipe (74), and the return pipe (76) are all sheathed with thermal insulation sleeves on their outer sides.

Images