Annealing apparatus

Abstract

The utility model discloses annealing equipment, include: annealing furnace, air inlet pipe, fixedly inserted in the bottom of annealing furnace, the circumferential surface of air inlet pipe is equipped with multiple groups along the axial distribution's through -hole no. 2, the air inlet pipe has the screw rod of coaxial rotation and inserts, the utility model discloses the cooperation of fan, series heat exchange pipe and water tank baffle, forms multistage cooling system, and high -temperature gas is fully heat exchanged with cooling medium in heat exchange pipe, and baffle prolongs cooling medium flow path, and the heat exchange efficiency is greatly promoted, realizes the step -by -step reduction of gas temperature, simultaneously, the design of air inlet pipe screw rod and plugging piece can quantize the opening area of through -hole no. 2, and the input of low -temperature gas is controlled, thereby realizes the multi -stage cooling curve of " heat preservation slow cooling fast cooling", matches austenite decomposition, pearlite transformation etc. Phase change demand in material annealing process, effectively avoids the material performance defect caused by improper cooling.

Description

Technical Field

[0001] This utility model relates to the field of annealing technology, and in particular to annealing equipment. Background Technology

[0002] Annealing is a common heat treatment process used to change the crystal structure of materials, reduce or eliminate internal stress, and improve the mechanical properties of materials. Annealing involves heating the material to a suitable temperature, holding it for a period of time, and then slowly cooling it to achieve rearrangement and recrystallization of the crystal structure, eliminate internal stress, and promote grain growth and refinement. Currently, annealing of materials generally uses an annealing chamber.

[0003] In existing annealing processes, the cooling rate cannot be flexibly adjusted according to the cooling requirements of the material at different stages of annealing, which can easily lead to uneven internal structure and unstable performance of the material. Therefore, an annealing device is proposed to solve this problem. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] Annealing equipment, including:

[0006] Annealing furnace;

[0007] An air inlet pipe is fixedly inserted into the bottom of the annealing furnace. Multiple sets of through holes distributed along the axial direction are opened on the circumferential surface of the air inlet pipe. A lead screw is coaxially rotatably inserted into the air inlet pipe. A sealing component that moves up and down along the axial direction of the air inlet pipe is threaded onto the surface of the lead screw and located inside the air inlet pipe.

[0008] The cooling assembly includes a water tank and multiple sets of partitions fixedly installed inside the water tank. The multiple sets of partitions divide the cavity of the water tank into multiple placement areas. Heat exchange tubes are installed in the placement areas. The inlet and outlet ends of two adjacent sets of heat exchange tubes are connected by a U-shaped connecting pipe to form a continuous flow channel. The air outlet end of the heat exchange tube at the first end is connected to the air inlet pipe, and the air inlet of the heat exchange tube at the last end is connected to a fan. The air inlet of the fan is connected to the interior of the annealing furnace.

[0009] As an improvement to the above technical solution, a placement net is fixedly connected to the surface of the air inlet pipe, which is located inside the annealing furnace and below the first through hole. Multiple sets of first through holes arranged in a ring array are opened on the surface of the air inlet pipe and below the placement net.

[0010] As an improvement to the above technical solution, the top and bottom of the water tank are respectively provided with a water outlet pipe and a cold water pipe. The water outlet pipe is connected to the placement area by a branch pipe one, and the cold water pipe is connected to the placement area by a branch pipe two. Solenoid valves are installed in both the branch pipe one and the branch pipe two.

[0011] As an improvement to the above technical solution, the drive assembly includes a motor disposed on the side wall of the intake pipe, the bottom of the lead screw passes through the intake pipe and extends to the outside of the intake pipe, and a drive belt is connected between the end of the lead screw extending to the outside of the intake pipe and the output end of the motor.

[0012] As an improvement to the above technical solution, the sealing component is adapted to the interior of the air intake pipe.

[0013] The beneficial effects of this utility model are:

[0014] By combining a fan, series heat exchange tubes, and water tank baffles, a multi-stage cooling system is formed. High-temperature gas exchanges heat fully with the cooling medium inside the heat exchange tubes. The baffles extend the flow path of the cooling medium, significantly improving heat exchange efficiency and achieving a step-by-step reduction in gas temperature. At the same time, the design of the screw and sealing parts inside the inlet pipe allows for quantitative adjustment of the opening area of ​​the second through hole, controlling the amount of low-temperature gas input. This enables a multi-stage cooling curve of "heat preservation → slow cooling → rapid cooling," matching the phase transformation requirements such as austenite decomposition and pearlite transformation during material annealing, and effectively avoiding material performance defects caused by improper cooling. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cooling component of this utility model.

[0017] Attached reference numerals: 10, Annealing furnace; 20, Inlet pipe; 21, Through hole one; 22, Through hole two; 23, Lead screw; 24, Sealing component; 30, Water tank; 31, Heat exchange tube; 32, Baffle plate; 33, Cold water pipe; 34, Fan; 35, Water outlet pipe; 36, Branch pipe one; 37, Branch pipe two. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Annealing equipment, including:

[0020] Annealing furnace 10;

[0021] An air inlet pipe 20 is fixedly inserted into the bottom of the annealing furnace 10. Multiple sets of through holes 22 distributed along the axial direction are opened on the circumferential surface of the air inlet pipe 20. A lead screw 23 is coaxially rotatably inserted into the air inlet pipe 20. A sealing member 24 that moves up and down along the axial direction of the air inlet pipe 20 is threaded onto the surface of the lead screw 23 and located inside the air inlet pipe 20.

[0022] The cooling assembly includes a water tank 30 and multiple sets of partitions 32 fixedly installed inside the water tank 30. The multiple sets of partitions 32 divide the cavity of the water tank 30 into multiple placement areas. Heat exchange tubes 31 are installed in the placement areas. The inlet and outlet ends of two adjacent sets of heat exchange tubes 31 are connected by a U-shaped connecting pipe to form a continuous flow channel. The air outlet end of the heat exchange tube 31 at the first end is connected to the air inlet pipe 20, and the air inlet of the heat exchange tube 31 at the end end is connected to the fan 34. The air inlet of the fan 34 is connected to the interior of the annealing furnace 10.

[0023] Specifically, the annealing furnace 10 serves as the core processing unit, heating the workpieces placed within it. When annealing is required, a blower draws the high-temperature gas from the annealing furnace 10 into the cooling assembly. The high-temperature gas is then sent by the blower 34 to the inlet of the end heat exchange tube 31 of the cooling assembly, flowing sequentially through multiple sets of series-connected heat exchange tubes 31. The high-temperature gas within the heat exchange tubes 31 undergoes heat conduction with the cooling medium in the water tank 30, and the heat is absorbed by the cooling medium, causing the gas temperature within the heat exchange tubes 31 to gradually decrease. The baffle 32 divides the water tank into multiple areas, extending the contact time and improving heat exchange efficiency. The gas treated by the cooling assembly is evenly sprayed into the furnace bottom through the through-hole 22 of the inlet pipe 20, ensuring uniform lateral diffusion of the gas within the furnace and avoiding localized airflow concentration or dead zones. When the screw 23 rotates, the sealing part 24 moves down, blocking most of the through hole 22, leaving only a small amount of ventilation area to maintain low-flow gas circulation in the furnace and prevent excessively rapid cooling. When the sealing part 24 moves up, the effective area of ​​the through hole 22 increases, the amount of low-temperature gas input increases, and the cooling rate in the furnace accelerates. By quantitatively controlling the number of through holes 22 that are open, a multi-stage cooling curve of "heat preservation → slow cooling → rapid cooling" can be achieved to match the phase transformation requirements of austenite decomposition and pearlite transformation during material annealing. The gas intake can be dynamically adjusted to achieve a gradual cooling effect. During the annealing process, the material may need to be kept at a high temperature for a period of time before it can be gradually cooled to a lower temperature. By gradually opening the through hole 22, this gradual cooling requirement can be adapted to, and the cooling effect can be improved.

[0024] In one embodiment, a placement net is fixedly connected to the surface of the air inlet pipe 20, located inside the annealing furnace 10 and below the through hole 21. Multiple sets of through holes 21 arranged in a ring array are opened on the surface of the air inlet pipe 20 and below the placement net. When the workpiece is placed on the placement net, the gas enters below the placement net through the through hole 21, which can also cool the bottom of the workpiece. This effectively avoids the problem of heat accumulation in the contact area between the bottom of the workpiece and the furnace bottom in traditional processes, which leads to insufficient local annealing. The placement net suspends the workpiece, and the airflow at the bottom can directly scour the bottom of the workpiece, eliminating contact thermal resistance and ensuring uniform cooling of the entire surface.

[0025] In one embodiment, the water tank 30 is provided with an outlet pipe 35 at its top and a cold water pipe 33 at its bottom. The outlet pipe 35 is connected to the placement area via a branch pipe 36, and the cold water pipe 33 is connected to the placement area via a branch pipe 37. Solenoid valves are installed in both the branch pipe 36 and the branch pipe 37. The low-temperature cooling medium from the cold water pipe 33 flows sequentially into each placement area through the branch pipe 37. When the cooling water flows through the heat exchange tube 31 within the placement area, it absorbs heat from the high-temperature gas inside the heat exchange tube 31, causing the temperature inside the heat exchange tube 31 to gradually decrease. The solenoid valve on each branch pipe 37 can operate independently. The solenoid valves on the branch pipe 37 can be opened to enhance the cooling effect when needed, allowing more cooling medium to enter the placement area, improving heat exchange efficiency and accelerating the cooling rate of high-temperature gas. Conversely, closing some solenoid valves reduces the flow rate of cooling medium and lowers the cooling intensity. This method is suitable for stages in the annealing process where the cooling rate requirement is lower. In this way, the cooling intensity of each placement area can be flexibly adjusted according to the temperature control requirements of different stages in the annealing process, thereby controlling the cooling process in the annealing furnace. After heat exchange, the cooling medium in the placement area is collected through the branch pipe 36 and discharged into the water outlet pipe 35 and then discharged into the water tank 30.

[0026] In one embodiment, a drive assembly is also included, which includes a motor disposed on the side wall of the intake pipe 20. The bottom of the lead screw 23 passes through the intake pipe 20 and extends to the outside of the intake pipe 20. A transmission belt is connected between the end of the lead screw 23 extending to the outside of the intake pipe 20 and the output end of the motor. When the motor is started, the motor drives the lead screw 23 to rotate through the transmission belt. The lead screw 23 drives the sealing member 24 to move up and down, thereby realizing the dynamic quantitative adjustment of the intake air volume during the annealing process.

[0027] In one embodiment, the sealing member 24 is adapted to the interior of the air intake pipe 20, and the circumferential surface of the sealing member 24 is slidably connected to the inner wall of the air intake pipe 20, so that the sealing member 24 moves up and down along the inner wall of the air intake pipe 20.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. Annealing equipment, characterized in that, include: Annealing furnace (10); An air inlet pipe (20) is fixedly inserted into the bottom of the annealing furnace (10). The circumferential surface of the air inlet pipe (20) has multiple sets of through holes (22) distributed along the axial direction. A lead screw (23) is coaxially rotatably inserted into the air inlet pipe (20). A sealing member (24) that moves up and down along the axial direction of the air inlet pipe (20) is threaded onto the surface of the lead screw (23) and inside the air inlet pipe (20). The cooling component includes a water tank (30) and multiple sets of partitions (32) fixedly installed in the water tank (30). The multiple sets of partitions (32) divide the cavity of the water tank (30) into multiple placement areas. Heat exchange tubes (31) are installed in the placement areas. The inlet and outlet ends of two adjacent sets of heat exchange tubes (31) are connected by a U-shaped connecting pipe to form a continuous flow channel. The outlet end of the heat exchange tube (31) at the first end is connected to the inlet pipe (20), and the inlet of the heat exchange tube (31) at the end end is connected to the fan (34). The inlet of the fan (34) is connected to the interior of the annealing furnace (10).

2. The annealing equipment according to claim 1, characterized in that: The surface of the air inlet pipe (20) and the interior of the annealing furnace (10) and below the through hole (21) are fixedly connected to a placement net. The surface of the air inlet pipe (20) and below the placement net are provided with multiple sets of through holes (21) arranged in a ring array.

3. The annealing equipment according to claim 2, characterized in that: The water tank (30) is provided with a water outlet pipe (35) and a cold water pipe (33) at the top and bottom respectively. The water outlet pipe (35) is connected to the placement area by a branch pipe (36). The cold water pipe (33) is connected to the placement area by a branch pipe (37). Solenoid valves are installed in both the branch pipe (36) and the branch pipe (37).

4. The annealing equipment according to claim 1, characterized in that: It also includes a drive assembly, which includes a motor disposed on the side wall of the intake pipe (20), the bottom of the lead screw (23) passing through the intake pipe (20) and extending to the outside of the intake pipe (20), and a drive belt connecting the end of the lead screw (23) extending to the outside of the intake pipe (20) to the output end of the motor.

5. The annealing equipment according to claim 1, characterized in that: The sealing element (24) is adapted to the interior of the air intake pipe (20).

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