Aluminum alloy annealing furnace capable of rapidly heating and cooling

Abstract

The invention relates to the field of heat treatment equipment, in particular to a rapid heating and cooling aluminum alloy annealing furnace which comprises an annealing furnace body and further comprises a circulating pipeline and a cooling system, the two ends of the circulating pipeline communicate with the interior of the annealing furnace body, and the cooling system is installed on the circulating pipeline and used for exchanging heat with gas in the circulating pipeline. The circulating pipeline is further provided with a circulating fan used for driving gas in the circulating pipeline to flow. The method has the effect of reducing the comprehensive cost in the product treatment process.

Description

Technical Field

[0001] The present application relates to the technical field of heat treatment equipment, and in particular to a rapid temperature rise and fall aluminum alloy annealing furnace. Background Art

[0002] In the processing of metal materials, annealing is an important process, which is used to eliminate the residual stress inside the material and improve the mechanical properties and processing properties of the material.

[0003] In the process of cooling down the furnace, the conventional annealing furnace usually opens the furnace door to dissipate heat inside the furnace, or stops heating to cool down naturally. The natural cooling cycle is long, which is not conducive to improving production efficiency. The utility model patent with publication number CN201121202Y discloses a hood-type annealing furnace cooling device, which mainly sets multiple axial flow fans on the top of the furnace body to improve the exchange of gas inside and outside the furnace.

[0004] In the related art, the annealing efficiency of the annealing furnace is improved by an axial flow fan, but it is not applicable to the annealing process of some special products (products that are not convenient for oxygen contact). This is mainly because the annealing furnace is mostly filled with nitrogen during the annealing process of special products. The above-mentioned annealing furnace cooling device discharges the nitrogen in the furnace into the air, resulting in a large nitrogen consumption, which is not conducive to reducing production costs. Summary of the invention

[0005] In order to reduce the cost during product annealing, the present application provides a rapid temperature rise and fall aluminum alloy annealing furnace.

[0006] The present application provides a rapid temperature rise and fall aluminum alloy annealing furnace adopts the following technical solution: A fast heating and cooling aluminum alloy annealing furnace comprises an annealing furnace body, a circulation pipe and a cooling system. Both ends of the circulation pipe are connected to the inside of the annealing furnace body. The cooling system is installed on the circulation pipe for exchanging heat with the gas in the circulation pipe. The circulation pipe is also provided with a circulation fan for driving the gas flow in the circulation pipe.

[0007] By adopting the above technical solution, during the cooling process of the annealing furnace body, the circulating fan drives the gas in the annealing furnace body to flow into the circulation pipe, and then the cooling system cools the gas. The cooled gas then enters the annealing furnace body again and circulates in sequence, thereby achieving rapid cooling of the furnace body and realizing closed circulation of the gas in the annealing furnace body, reducing the consumption of gas in the annealing furnace body and reducing the product annealing cost.

[0008] Optionally, the cooling system includes a heat exchanger and a cooling water tower, the heat exchanger is connected to the circulation pipeline for exchanging heat with the gas inside the circulation pipeline, and the cooling water tower is connected to the heat exchanger for cooling the heat exchanger.

[0009] By adopting the above technical solution, the heat exchanger exchanges heat with the gas inside the circulation pipeline to cool the gas, and then the cooling water tower cools the heat exchanger, so that the heat exchanger can continuously cool the gas in the circulation pipeline.

[0010] Optionally, a mode control device is provided on the circulation pipeline, and the mode control device includes a temperature detection component and a voltage control component. The circulation fan includes a shell, blades rotatably connected to the inside of the shell, and a driving member fixed to the outside of the shell for driving the blades to rotate. The voltage change at both ends of the driving member can cause the blade speed to change. The voltage control component is used to control the voltage at both ends of the driving member, and the temperature detection component is used to detect the temperature of the gas inside the circulation pipeline.

[0011] By adopting the above technical solution, during the gas circulation process in the annealing furnace body, the temperature in the circulation pipe can reflect the temperature in the annealing furnace body. According to the temperature in the annealing furnace body, the speed of the circulation fan is controlled to adjust the cooling rate in the annealing furnace body. The cooling rate of the annealing furnace body is controlled according to different products and the temperature in the annealing furnace body, thereby improving the annealing effect of the product.

[0012] Optionally, the temperature detection component includes a detection ring, a heat-driving component and a movable ring. The detection ring is hollow and its interior is connected to the interior of the circulation pipe. The movable ring is slidably connected inside the detection ring. The heat-driving component is installed inside the detection ring and connected to the movable ring. The heat-driving component absorbs heat to drive the movable ring to move.

[0013] By adopting the above technical solution, the heat drive component drives the sliding ring to move as the temperature changes, and the temperature inside the circulation pipeline is judged by the movement stroke of the movable ring, thereby realizing the detection of the gas temperature inside the circulation pipeline.

[0014] Optionally, the temperature detection assembly further includes a drive ring, which is rotatably disposed in the detection ring, the movable ring is threadedly sleeved on the drive ring, and the thermal drive component is connected to the drive ring and can drive the drive ring to rotate.

[0015] By adopting the above technical solution, the heat drive member drives the driving ring to rotate, and then cooperates with the thread to drive the movable ring. The self-locking property of the thread can improve the stability of the movable ring itself, and at the same time make the force on the movable ring more uniform.

[0016] Optionally, the voltage control component includes a resistor rod and two electrical connectors made of conductive material, the two electrical connectors are arranged on the resistor rod at intervals, and at least one of the electrical connectors can slide along the length direction of the resistor rod, and the two electrical connectors are connected in series to the driving circuit of the driving component.

[0017] By adopting the above technical solution, two electrical connectors are connected in series in the circuit, and the resistor rod between the two electrical connectors is connected in series in the circuit. By adjusting the position between the two electrical connectors, the length of the resistor rod connected in series to the circuit can be changed, thereby realizing the control of the voltage at both ends of the driving component.

[0018] Optionally, the length direction of the resistor rod is parallel to the sliding direction of the movable ring, the movable ring is connected to an electrical connector slidably connected to the resistor rod, and the movement of the movable ring can drive the electrical connector to move.

[0019] By adopting the above technical solution, by connecting the movable plate and the electrical connector, the circulating fan can respond according to the temperature in the annealing furnace body. In this connection mode, it can be shown that when the temperature in the annealing furnace body is high, the length of the resistor rod connected in series to the driver circuit is short, and the voltage across the driver is large, so that the blade speed is high and the cooling speed is fast. As the temperature continues to decrease, the cooling rate decreases smoothly, which is convenient for the staff to control the temperature change curve in the annealing furnace body.

[0020] Optionally, the resistance rod can slide in a direction parallel to the sliding direction of the movable ring, and a timing module for driving the resistance rod to move at a uniform speed is provided on the circulation pipeline.

[0021] By adopting the above technical solution, in the actual annealing process, assuming that the rotational speed of the two blades remains unchanged, the cooling rate in the annealing furnace body remains unchanged, and the movable ring and the resistance rod are kept relatively still by the moving resistance rod, thereby providing the staff with another cooling mode, namely, uniform cooling, so that the staff can control the operation of the timing module according to the actual product in the actual production process, select different cooling modes, and broaden the scope of application of the annealing furnace body.

[0022] Optionally, the timing module includes a gas cylinder, a piston and a cover plate, the piston is slidably fitted in the gas cylinder, the resistance rod is connected to the piston, the cover plate is sealed at one end of the gas cylinder away from the resistance rod, the cover plate is provided with exhaust micropores, and the gas cylinder is provided with an elastic member for continuously applying force to the piston.

[0023] By adopting the above technical solution, under the action of the elastic member, the piston maintains a tendency to move in one direction, and at the same time, the exhaust micropores on the cover plate are used to control the flow of air entering or exiting the cylinder, providing damping for the movement of the piston, so that the movement of the piston tends to be uniform, and the uniform movement of the resistor rod is achieved. During the annealing process of the annealing furnace body, when the uniform cooling mode is selected, the resistor rod is first slid, and the movement of the resistor rod is adjusted to change the distance between the two electrical connectors, thereby achieving manual intervention in the rotation speed of the blade. The reset member then drives the piston to drive the resistor rod. In this process, if the temperature drops too fast or too slow, it will cause a change in the distance between the two electrical connectors, thereby automatically adjusting the rotation speed of the blade, so that the temperature in the annealing furnace can tend to change at a uniform speed.

[0024] Optionally, the cover plate can slide in a direction parallel to the sliding direction of the piston, and the gas cylinder is further provided with a reset member for applying a force to the cover plate to bring the cover plate closer to the gas cylinder.

[0025] By adopting the above technical solution, during the manual sliding of the piston, the piston approaches the cover plate, and under the action of the pressure in the gas cylinder, it can overcome the elastic force of the elastic member, so that the cover plate is away from the gas cylinder, thereby quickly discharging the air in the gas cylinder, making it convenient for the staff to quickly adjust the distance between the two electrical connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the cooling device of the first embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the overall structure of the mode control device of the second embodiment of the present application.

[0029] Figure 4 It is a schematic structural diagram of the temperature detection component at a first angle of the second embodiment of the present application.

[0030] Figure 5 It is a structural schematic diagram of the temperature detection component at a second angle of the second embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the structure of the voltage control component of the second embodiment of the present application when the piston is away from the initial position.

[0032] Figure 7 It is a schematic structural diagram of the voltage control component of the second embodiment of the present application when the piston is in the initial position.

[0033] Figure 8 It is a schematic structural diagram of the cover plate of the second embodiment of the present application.

[0034] Reference numerals: 1, annealing furnace body; 2, cooling device; 21, circulation pipeline; 211, air outlet pipe; 2111, main pipeline; 2112, branch pipeline; 212, air inlet pipe; 2121, primary pipeline; 2122, secondary pipeline; 22, cooling system; 221, heat exchanger; 222, cooling water tower; 23, circulation fan; 3, mode control device; 31, temperature detection component; 32, detection ring; 33, sliding cavity; 34, Drive ring; 35, thermal drive part; 351, fixed end; 352, free end; 36, indicator rod; 37, movable ring; 4, voltage control component; 41, resistor rod; 42, electrical connector; 421, movable electrode; 422, fixed electrode; 5, timing module; 51, air cylinder; 52, piston; 53, elastic part; 54, cover plate; 55, exhaust micropore; 56, protective cover; 57, large displacement air pore; 58, reset part; 6, valve. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 This application is described in further detail.

[0036] The embodiment of the present application discloses a rapid temperature rise and fall aluminum alloy annealing furnace.

[0037] Reference Figure 1 and Figure 2 A fast heating and cooling aluminum alloy annealing furnace comprises an annealing furnace body 1 and a cooling device 2, wherein the cooling device 2 comprises a circulation pipe 21 and a cooling system 22. The circulation pipe 21 comprises an air outlet pipe 211 and an air inlet pipe 212, wherein the air outlet pipe 211 and the air inlet pipe 212 are both connected to the inside of the annealing furnace, and the air outlet pipe 211 and the air inlet pipe 212 are connected to each other. The cooling system 22 is arranged between the air inlet pipe 212 and the air outlet pipe 211, and is used to cool down the gas flowing through the cooling system 22. A circulation fan 23 is arranged between the air outlet pipe 211 and the cooling system 22, and the circulation fan 23 is used to promote the flow of air to the cooling system 22, and the gas after cooling and cooling enters the furnace body again through the air inlet pipe 212, thereby realizing a closed circulation of the gas in the furnace, and the gas is cooled by the cooling device 2 to realize the rapid cooling of the inside of the furnace body.

[0038] Reference Figure 1 and Figure 2The cooling system 22 includes a heat exchanger 221, which is used to exchange heat between the air in the circulation pipe and the external environment. In this embodiment, the heat exchanger 221 is a shell-and-tube heat exchanger 221, and the end of the air outlet pipe 211 away from the annealing furnace body 1 is connected to the air inlet of the shell-and-tube heat exchanger 221, and the end of the air inlet pipe 212 away from the annealing furnace body 1 is connected to the air outlet of the shell-and-tube heat exchanger 221. When the air in the circulation pipe 21 flows through the shell-and-tube heat exchanger 221, it can exchange heat with the coolant in the shell of the shell-and-tube heat exchanger 221 to achieve cooling of the gas.

[0039] Reference Figure 1 and Figure 2 The cooling system 22 also includes a cooling water tower 222, which is connected to the coolant outlet of the shell-and-tube heat exchanger 221, and is used to cool the coolant and inject the cooled coolant into the shell of the shell-and-tube heat exchanger 221 again.

[0040] Reference Figure 1 and Figure 2 The air outlet pipe 211 includes a main pipe 2111 and a branch pipe 2112. The main pipe 2111 is arranged outside the annealing furnace body 1. A plurality of branch pipes 2112 are arranged along the length direction of the main pipe 2111 and are located above the annealing furnace body 1. One end of the branch pipe 2112 is connected to the main pipe 2111, and the other end is inserted into the interior of the annealing furnace body 1 to achieve communication between the interior of the annealing furnace body 1 and the main pipe 2111. At the same time, the arrangement of multiple branch pipes 2112 can improve the efficiency and uniformity of high-temperature gas discharge inside the annealing furnace body 1 and reduce the uneven temperature in the furnace.

[0041] Reference Figure 1 and Figure 2 The air inlet pipe 212 includes a primary pipe 2121 and a plurality of secondary pipes 2122, and the primary pipe 2121 is connected to the air outlet of the shell-and-tube heat exchanger 221. The secondary pipes 2122 are arranged in two groups, and the two secondary pipes 2122 are arranged at two mutually parallel inner side walls close to the annealing furnace body 1, so as to evenly inject air into the furnace and reduce the uniformity of the temperature in the furnace during the heating or cooling process of the annealing furnace body 1.

[0042] The implementation principle of a fast temperature rise and fall aluminum alloy annealing furnace in the embodiment of the present application is: the high temperature gas in the annealing furnace body 1 is driven into the cooling system 22 by the circulating fan 23, and the gas cooled by the cooling system 22 enters the annealing furnace body 1, and the annealing furnace body 1 is actively cooled. On the one hand, the cooling rate of the annealing furnace body 1 is improved, and on the other hand, the gas in the annealing furnace body 1 is recycled, reducing the waste of gas in the furnace and reducing the product annealing cost.

[0043] Example 2 Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that in this application, a mode control device 3 for detecting the temperature of the annealing furnace body 1 and controlling the operation of the circulating fan 23 is provided on the air outlet pipe 211. In this application, the circulating fan 23 includes a housing and an impeller rotatably connected to the inside of the housing, and an air inlet and an air outlet are provided on the housing. A driving member for driving the impeller to rotate is provided outside the housing. In this embodiment, the driving member is a DC motor, and its speed can be adjusted according to the voltage at both ends of the motor.

[0044] Reference Figure 4 and Figure 5 , the mode control device 3 includes a temperature detection component 31 and a voltage control component 4. The temperature detection component 31 is arranged inside the air outlet pipe 211 and is used to detect the temperature inside the annealing furnace body 1. The voltage control component 4 is used to control the voltage at both ends of the driving member, thereby controlling the rate at which air circulates inside and outside the annealing furnace body 1, and then controlling the cooling rate of the annealing furnace body 1. In this embodiment, the annealing furnace body 1 may not be coordinated with the cooling system 22 during use. Specifically, the circulation of the gas in the annealing furnace body 1 is an open cycle, that is, as the air in the annealing furnace body 1 is extracted, a large amount of external cold air enters the annealing furnace body 1. When the mode control device 3 in this embodiment is used in conjunction with the cooling system 22, it is necessary to ensure that the cooling system 22 has a cooling effect on the gas in the circulation pipe 21.

[0045] Reference Figure 4 and Figure 5 The temperature detection component 31 includes a detection ring 32, which is an annular structure. The main pipeline 2111 is divided into two parts along its own length, and the detection ring 32 is arranged between the two parts of the main pipeline 2111. The two end faces of the detection ring 32 are respectively welded to the two parts of the detection ring 32, and the inner wall of the detection ring 32 is flush with the inner wall of the main pipeline 2111, forming a complete channel for gas to pass through. The detection ring 32 is hollow inside, forming an annular sliding cavity 33, and a movable ring 37 is provided in the sliding cavity 33 in a sliding fit along a direction parallel to its own length, and the outer wall of the movable ring 37 is in contact with the side wall of the sliding cavity 33 parallel to its own length. The sliding connection of the movable ring 37 in a direction parallel to the length of the detection ring 32 is realized.

[0046] Reference Figure 4 and Figure 5The temperature detection assembly 31 also includes a drive ring 34, which is a cylindrical structure. In this embodiment, the detection ring 32 is a circular ring structure, and the drive ring 34 is correspondingly set to a circular ring structure. The drive ring 34 is coaxially arranged in the sliding cavity 33, and the inner side wall of the drive ring 34 is in contact with the inner side wall of the drive cavity, and the drive ring 34 can rotate around its own axis. A threaded groove is provided on the outer side wall of the drive ring 34, and the movable ring 37 is threadedly sleeved on the drive ring 34, and rotating the drive ring 34 can drive the movable ring 37 to move.

[0047] Reference Figure 4 and Figure 5 The heat drive member 35 is used to drive the drive ring 34 to rotate. In this embodiment, the heat drive member 35 is a bimetallic strip. The bimetallic strip is in a scroll-like structure at room temperature (25°C-30°C). The two ends of the bimetallic strip are defined as a fixed end 351 and a free end 352. In this embodiment, the fixed end 351 is the end of the bimetallic strip away from the inside of the main pipe 2111, which is welded to the side wall of the accommodating cavity, and the other end is welded to the drive ring 34. The bimetallic strip is formed by two layers of materials with different thermal expansion coefficients. When the ambient temperature changes, it can be deformed so that its free end 352 can drive the drive ring 34 to rotate, thereby driving the movable ring 37 to move. The position of the movable ring 37 can reflect the internal temperature of the annealing furnace body 1.

[0048] Reference Figure 4 and Figure 5 In this embodiment, the temperature range of the annealing furnace body 1 is 0℃-500℃. The number of track coils of the bimetallic strip at room temperature is defined as X, and the number of turns of the free end 352 relative to the fixed end 351 in the range of 0℃-500℃ is defined as Y. In this way, during the temperature change process, the relationship between the rotation angle of the free end 352 and the temperature change tends to change linearly. Y≤1 / 10X, and Y≥4.

[0049] Reference Figure 4 and Figure 5 The temperature detection assembly 31 also includes an indicator rod 36, which is arranged along the sliding direction of the movable ring 37, and one end of the indicator rod 36 is welded to the side of the movable ring 37 away from the liquid chamber, and the other end extends to the outside of the detection ring 32 for easy observation by the staff.

[0050] Reference Figure 6 and Figure 7The voltage control component 4 includes a resistor rod 41 and two electrical connectors 42 made of conductive metal materials, and the two electrical connectors 42 are defined as a movable electrode 421 and a fixed electrode 422. The fixed electrode 422 is fixed to the resistor rod 41 by screws, and the resistor rod 41 is made of a conductive material with relatively large resistance, such as manganese-copper alloy, iron-chromium-aluminum alloy, etc. The movable electrode 421 is slidably connected to the resistor rod 41, and sliding the movable electrode 421 can increase or decrease the distance between the two electrical connectors 42. The two electrical connectors 42 are connected in series in the driving circuit of the driving component, and the size of the resistance connected in series in the circuit is controlled by sliding the movable electrode 421, thereby realizing the control of the voltage at both ends of the driving component, and then realizing the control of the speed of the DC motor.

[0051] Reference Figure 6 and Figure 7 , the end of the indicator rod 36 away from the movable plate is fixed on the movable electrode 421, and the fixed electrode 422 is located on the side of the movable electrode 421 away from the movable ring 37. When the heat drive member 35 is heated, it can drive the indicator rod 36 to move in the direction close to the fixed electrode 422, thereby reducing the resistance connected in series in the DC motor drive circuit and increasing the speed of the DC motor. On the contrary, when the temperature gradually decreases, the indicator rod 36 gradually moves away from the fixed electrode 422, so that the speed of the DC motor gradually decreases until it stops rotating, realizing the automatic power-off of the circulation fan 23. In this mode, the speed of the DC motor gradually decreases, the speed of gas circulation in the annealing furnace body 1 gradually decreases, and the speed of its temperature reduction also gradually decreases. In this mode, the temperature change curve in the annealing furnace body 1 shows a rapid cooling first and then a slow cooling.

[0052] Reference Figure 6 and Figure 7 The resistor rod 41 is slidably connected to the main pipe 2111 in a direction parallel to the sliding direction of the indicator rod 36. The resistor rod 41 can be slidably connected to the main pipe 2111 in a direction parallel to the sliding direction of the indicator rod 36. By sliding the resistor rod 41, the resistor rod 41 can be synchronously operated with the indicator rod 36, so that the speed of the circulating fan 23 remains unchanged. In this mode, the temperature in the annealing furnace body 1 can drop at a uniform speed.

[0053] Reference Figure 6 and Figure 7The voltage control assembly 4 also includes a timing module 5, which is used to drive the resistor rod 41 to move at a uniform speed. The timing module 5 includes an air cylinder 51, a piston 52 and an elastic member 53. The air cylinder 51 is a shell structure with openings at both ends. The air cylinder 51 is arranged parallel to the resistor rod 41 and welded to the main pipeline 2111. The piston 52 is slidably fitted in the air cylinder 51 along the length direction of the air cylinder 51, and one end of the resistor rod 41 is fixed on the piston 52 to achieve a sliding connection between the resistor rod 41 and the main pipeline 2111. A cover plate 54 is provided on the end surface of the air cylinder 51 away from the resistor rod 41. The cover plate 54 is used to block the end of the air cylinder 51 away from the resistor rod 41. The cover plate 54 is provided with exhaust micropores 55, and the exhaust micropores 55 pass through the cover plate 54. The elastic member 53 is arranged inside the gas cylinder 51 to apply a force to the piston 52 to make the piston 52 move in the direction close to the detection ring 32. In this embodiment, the elastic member 53 is a spring, one end of which is fixedly connected to the piston 52, and the other end is fixed to the gas cylinder 51. Under the action of the elastic member 53, the piston 52 can maintain the tendency to move in the direction close to the detection ring 32, and at the same time, the damping force brought by the exhaust micro-holes 55 can make the movement of the piston 52 tend to uniform motion.

[0054] Reference Figure 6 and Figure 7 , the limit position of the movement trajectory of the piston 52 close to the detection ring 32 is defined as the initial position of the piston 52. In the absence of external force, the piston 52 is stable at the initial position. In the actual cooling process of the annealing furnace body 1, according to the characteristics of the product in the furnace, the piston 52 can be slid first to move the piston 52 away from the initial position. The movement of the piston 52 drives the resistor rod 41 to move, thereby increasing the distance between the two electrical connectors 42 and reducing the speed of the circulating fan 23. By manually intervening in the speed of the circulating fan 23, damage to the product caused by excessive cooling can be avoided. For example, if the glass product is cooled too quickly, the grains will be over-elongated and the grain boundaries will be weakened.

[0055] Reference Figure 6 and Figure 7 After the position adjustment of the piston 52 is completed, under the action of the elastic member 53, the resistor rod 41 moves at a uniform speed in the direction close to the detection ring 32. The indicator rod 36 changes with the temperature change in the annealing furnace body 1. When the temperature of the annealing furnace body 1 changes too quickly, the indicator rod 36 drives the movable electrode 421 to move relatively away from the fixed electrode 422, so that the speed of the circulating fan 23 is automatically reduced. Similarly, when the temperature of the annealing furnace body 1 decreases too slowly, the indicator rod 36 drives the movable electrode 421 to approach the fixed electrode 422, so that the speed of the circulating fan 23 increases, so that the speed of the temperature reduction in the annealing furnace body 1 tends to be uniform, thereby improving the quality of the product.

[0056] Reference Figure 6 and Figure 7The time it takes for the piston 52 to move from the extreme position of the initial position to the initial position is 1 hour. During the actual use of the annealing furnace body 1, the size of the exhaust micropore 55 can be determined according to the cooling rate required by the specific product, thereby adjusting the time required for the entire movement stroke of the piston 52, and further adjusting the cooling rate.

[0057] Reference Figure 7 and Figure 8 The timing module 5 further includes a protective cover 56, which is a shell structure with one side opening, and the cover is arranged outside the cover plate 54 and is welded to the gas cylinder 51. The side wall of the cover plate 54 is fitted with the inner wall of the protective cover 56, and is slidably fitted in the protective cover 56 along the length direction of the gas cylinder 51. A large displacement air hole 57 is arranged on the side wall of the protective cover 56, and the large displacement air hole 57 is connected to the inside of the protective cover 56. The sliding cover plate 54 can make the cover plate 54 away from the gas cylinder 51, so that the inside of the gas cylinder 51 is connected with the inside of the protective cover 56, so that the gas in the gas cylinder 51 can be quickly discharged from the large displacement air hole 57, which is convenient for the staff to move the piston 52 in the direction away from the detection ring 32.

[0058] Reference Figure 7 and Figure 8 The timing module 5 further includes a reset member 58, which is disposed inside the protective cover 56 and is used to keep the cover plate 54 moving toward the direction close to the gas cylinder 51. In this embodiment, the reset member 58 is a spring. Under the action of the spring, the cover plate 54 can drive the cover plate 54 to automatically approach the gas cylinder 51 and block the end of the gas cylinder 51 away from the detection ring 32, so that when the piston 52 moves toward the direction close to the detection ring 32, the air can only enter from the exhaust micropores 55. When the staff applies a force to the piston 52 to move it away from the detection ring 32, the internal air pressure of the gas cylinder 51 can overcome the elastic force of the reset member 58 to move it away from the gas cylinder 51, so that the air is quickly discharged from the large displacement pores 57.

[0059] Reference Figure 3 and Figure 6 A valve 6 can be provided between the temperature detection component 31 and the annealing furnace body 1 to prevent the temperature in the furnace from spreading to the temperature detection component 31 during the heating or heat preservation process of the annealing furnace body 1, thereby improving the heat preservation effect of the annealing furnace body 1. In addition, when the valve 6 is opened, the temperature spreads to the temperature detection component 31, so that the indicator rod 36 drives the movable electrode 421 close to the fixed electrode 422, and the circulating fan 23 is automatically started. Of course, for special products, the staff needs to slide the piston 52 after opening the valve 6 to adjust the position of the piston 52.

[0060] The implementation principle of the fast heating and cooling aluminum alloy annealing furnace in the embodiment of the present application is as follows: the temperature detection component 31 detects the temperature inside the annealing furnace body 1, and adjusts the rotation speed of the circulating fan 23 according to the temperature inside the annealing furnace body 1, thereby realizing the control of the cooling rate of the annealing furnace body 1, which is convenient for manufacturers to set different temperature change curves for different products and improve product quality.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. 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 rapid heating and cooling aluminum alloy annealing furnace, comprising an annealing furnace body (1), characterized in that: It also includes a circulation pipeline (21) and a cooling system (22), wherein both ends of the circulation pipeline (21) are connected to the interior of the annealing furnace body (1), the cooling system (22) is installed on the circulation pipeline (21) and is used for exchanging heat with the gas in the circulation pipeline (21), and the circulation pipeline (21) is also provided with a circulation fan (23) for driving the gas flow in the circulation pipeline (21).

2. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 1, characterized in that: The cooling system (22) comprises a heat exchanger (221) and a cooling water tower (222); the heat exchanger (221) is connected to the circulation pipeline (21) and is used to exchange heat with the gas inside the circulation pipeline (21); and the cooling water tower (222) is connected to the heat exchanger (221) and is used to cool the heat exchanger (221).

3. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 1, characterized in that: The circulation pipeline (21) is provided with a mode control device (3), the mode control device (3) comprising a temperature detection component (31) and a voltage control component (4), the circulation fan (23) comprising a housing, blades rotatably connected to the inside of the housing, and a driving member fixed to the outside of the housing for driving the blades to rotate, a voltage change at both ends of the driving member can cause a change in the rotation speed of the blades, the voltage control component (4) is used to control the voltage at both ends of the driving member, and the temperature detection component (31) is used to detect the temperature of the gas inside the circulation pipeline (21).

4. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 3, characterized in that: The temperature detection assembly (31) comprises a detection ring (32), a heat-driving component (35) and a movable ring (37); the detection ring (32) is hollow inside and communicates with the inside of the circulation pipe (21); the movable ring (37) is slidably connected inside the detection ring (32); the heat-driving component (35) is installed inside the detection ring (32) and connected to the movable ring (37); the heat-driving component (35) absorbs heat and can drive the movable ring (37) to move.

5. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 4, characterized in that: The temperature detection assembly (31) further comprises a drive ring (34), the drive ring (34) being rotatably disposed in the detection ring (32), the movable ring (37) being threadedly sleeved on the drive ring (34), and the heat drive member (35) being connected to the drive ring (34) and capable of driving the drive ring (34) to rotate.

6. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 4, characterized in that: The voltage control component (4) comprises a resistor rod (41) and two electrical connectors (42) made of a conductive material, the two electrical connectors (42) being arranged on the resistor rod (41) at intervals, and at least one of the electrical connectors (42) being able to slide along the length direction of the resistor rod (41), and the two electrical connectors (42) being connected in series to a drive circuit of a drive component.

7. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 6, characterized in that: The length direction of the resistance rod (41) is parallel to the sliding direction of the movable ring (37); the movable ring (37) is connected to an electrical connector (42) slidably connected to the resistance rod (41); movement of the movable ring (37) can drive movement of the electrical connector (42).

8. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 7, characterized in that: The resistance rod (41) is capable of sliding in a direction parallel to the sliding direction of the movable ring (37), and a timing module (5) for driving the resistance rod (41) to move at a uniform speed is provided on the circulation pipeline (21).

9. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 8, characterized in that: The timing module (5) comprises an air cylinder (51), a piston (52) and a cover plate (54); the piston (52) is slidably fitted in the air cylinder (51); the resistance rod (41) is connected to the piston (52); the cover plate (54) is sealed at one end of the air cylinder (51) away from the resistance rod (41); an exhaust micro hole (55) is provided on the cover plate (54); and an elastic member (53) for continuously applying a force to the piston (52) is provided on the air cylinder (51).

10. The rapid temperature rise and fall aluminum alloy annealing furnace according to claim 9, characterized in that: The cover plate (54) is capable of sliding in a direction parallel to the sliding direction of the piston (52), and the gas cylinder (51) is also provided with a reset member (58) for applying a force to the cover plate (54) so ​​that the cover plate (54) is close to the gas cylinder (51).

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