Continuous heat treatment device for alloy steel pipe

Abstract

The utility model discloses a continuous heat treatment device for an alloy steel pipe. The continuous heat treatment device comprises a base, a supporting frame, a conveying assembly, a heating assembly, a heat preservation assembly and a cooling assembly, the conveying assembly achieves stable conveying of steel pipes through a bearing tray. The heating assembly adopts an electric heating pipe and a reflecting layer to improve the heating efficiency; the temperature uniformity of the heat preservation assembly is ensured through multiple layers of heat insulation plates and a circulating fan; the cooling assembly achieves accurate cooling control through a spraying head and a temperature monitoring probe. The device realizes continuous operation of a heat treatment process, avoids the problem of temperature fluctuation in traditional sectional operation, has the characteristics of high efficiency, energy conservation and environmental protection, and remarkably improves the heat treatment effect and the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for metallic materials, and in particular to a continuous heat treatment device for alloy steel pipes. Background Technology

[0002] In the production of alloy steel pipes, heat treatment is a crucial step in ensuring stable performance and reliable quality. This process is particularly important for high-strength alloy steel pipes, as it not only requires achieving specific hardness and toughness indicators but also optimizing the material's microstructure through precise temperature control. This helps improve the service life and reliability of the steel pipes under complex working conditions.

[0003] Since the heat treatment of alloy steel pipes typically involves multiple steps such as heating, holding, and cooling, only when each step meets the process requirements can the performance of the final product be guaranteed to meet standards. However, existing heat treatment equipment often employs segmented operation, meaning different processes must be completed in independent equipment. This approach easily leads to temperature fluctuations in the steel pipes during process switching, thus affecting the consistency of heat treatment results. Furthermore, frequent process transfers reduce production efficiency, increase energy consumption, and increase the frequency of manual intervention. Therefore, existing equipment has certain limitations in terms of continuity and stability. Utility Model Content

[0004] The purpose of this utility model is to provide a continuous heat treatment device for alloy steel pipes, which solves the problems mentioned in the background art.

[0005] This utility model is implemented as follows: a continuous heat treatment device for alloy steel pipes includes a base, on which a support frame is fixedly mounted, and further includes:

[0006] The conveying assembly includes a guide rail fixed to the top of a support frame, a plurality of spaced-apart carrying trays slidably connected within the guide rail, rollers at the bottom of the carrying trays, the rollers cooperating with the guide rail, the carrying trays being used to place alloy steel pipes to be processed, a drive motor fixedly mounted on one side of the support frame, the output shaft of the drive motor being connected to a transmission chain, the transmission chain engaging with the rollers at the bottom of the carrying trays to drive the carrying trays to move along the guide rail;

[0007] Heating assembly; The heating assembly is located at one end of the support frame. The heating assembly includes a heating box fixed to the top of the support frame. Electric heating tubes are installed inside the heating box. The electric heating tubes are arranged in a spiral shape. The outside of the electric heating tubes is wrapped with a high-temperature resistant ceramic layer. A smoke exhaust pipe is installed at the top of the heating box. The smoke exhaust pipe is connected to an external dust removal system. A feed inlet and a discharge outlet are respectively opened at both ends of the heating box. Heat insulation curtains are installed at both the feed inlet and the discharge outlet. The heat insulation curtains are made of flexible high-temperature resistant material.

[0008] The insulation component is located downstream of the heating component. The insulation component includes an insulation box fixed to the top of the support frame. The insulation box is equipped with multiple layers of heat insulation boards, and nano-aerogel material is filled between the heat insulation boards. A temperature sensor is installed on the top of the insulation box and is electrically connected to an external control system. An inlet and an outlet are opened at both ends of the insulation box, and automatic adjustment doors are installed at both the inlet and the outlet. The automatic adjustment doors are driven by a pneumatic actuator.

[0009] Cooling assembly; the cooling assembly is located downstream of the insulation assembly. The cooling assembly includes a cooling box fixed to the top of the support frame. Multiple spray heads are installed inside the cooling box. The spray heads are connected to an external coolant supply system. A liquid collection tank is installed at the bottom of the cooling box. The liquid collection tank is connected to a coolant recovery system through a pipe. An inlet and an outlet are opened at both ends of the cooling box. An air curtain is installed at both the inlet and the outlet. The air curtain is used to prevent outside air from entering the cooling box.

[0010] Preferably, the upper surface of the carrying pallet is provided with a plurality of positioning grooves, and an elastic clamping member is provided in the positioning groove. The elastic clamping member is made of spring steel sheet and is used to fix the position of the alloy steel pipe to prevent it from shifting during the transportation process.

[0011] Preferably, the inner wall of the heating chamber is provided with a reflective layer made of polished stainless steel. The reflective layer is used to uniformly reflect the heat emitted by the electric heating tube into the interior of the heating chamber to improve heating efficiency.

[0012] Preferably, a circulating fan is installed inside the insulation box. The circulating fan is fixed to the top of the insulation box. The air inlet of the circulating fan is connected to the inside of the insulation box. A guide plate is installed at the air outlet. The guide plate is used to guide the airflow to be evenly distributed inside the insulation box in order to maintain the uniformity of the temperature inside the box.

[0013] Preferably, a temperature monitoring probe is installed inside the cooling box. The temperature monitoring probe is electrically connected to an external control system. The temperature monitoring probe is used to monitor the temperature change inside the cooling box in real time. When the temperature exceeds the set value, the control system activates the spray head to cool down the box.

[0014] Preferably, a filter screen is provided at the bottom of the cooling box, and the filter screen is located above the liquid collection tank. The filter screen is used to intercept impurities in the coolant and prevent impurities from entering the coolant recovery system.

[0015] Preferably, the bottom of the support frame is provided with a shock-absorbing pad, which is made of rubber material. The shock-absorbing pad is used to absorb the vibration generated during the operation of the device to improve the stability of the device.

[0016] Preferably, limit blocks are provided at both ends of the guide rail. The limit blocks are used to restrict the movement range of the carrying pallet and prevent the carrying pallet from leaving the guide rail.

[0017] This utility model provides a continuous heat treatment device for alloy steel pipes, which offers the following advantages: The device uses a conveying assembly to sequentially pass the alloy steel pipe through a heating assembly, an insulation assembly, and a cooling assembly, achieving continuous operation of the heat treatment process. The design of the conveying assembly allows for a smooth transition between different processes, avoiding temperature fluctuations caused by process switching in traditional segmented operations. The heating assembly, through the combination of electric heating tubes and a reflective layer, improves heating efficiency, while the design of the exhaust duct and heat insulation curtain effectively reduces heat loss and environmental pollution. The insulation assembly, through the combination of multi-layer insulation boards and nano-aerogel materials, significantly reduces heat loss, and the placement of circulating fans and guide plates further ensures temperature uniformity within the chamber. The cooling assembly, through the combination of spray heads and temperature monitoring probes, achieves precise control of the cooling process, and the filter design effectively prevents impurities in the coolant from entering the recovery system. In summary, this device, through the synergistic cooperation of its components, achieves continuous heat treatment while also being highly efficient, energy-saving, and environmentally friendly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the main components of the continuous heat treatment device for alloy steel pipes, including the layout and connection relationship of the conveying assembly, heating assembly, heat preservation assembly and cooling assembly.

[0019] Figure 2 This utility model Figure 1 A partial structural diagram.

[0020] Figure 3 This utility model Figure 1 Enlarged view of point A.

[0021] The attached diagram is labeled as follows: 1. Base; 2. Support frame; 3. Guide rail; 4. Load-bearing tray; 5. Drive motor; 6. Transmission chain; 7. Heating chamber; 8. Electric heating element; 9. Smoke exhaust duct; 10. Heat insulation curtain; 11. Insulated chamber; 12. Heat insulation board; 13. Temperature sensor; 14. Automatic regulating door; 15. Cooling chamber; 16. Spray head; 17. Liquid collection tank; 18. Air curtain machine; 19. Elastic clamping component; 20. Circulating fan; 21. Deflector plate; 22. Temperature monitoring probe; 23. Filter screen; 24. Shock-absorbing pad; 25. Limiting block. Detailed Implementation

[0022] This utility model provides a continuous heat treatment device for alloy steel pipes, the structure of which is as follows: Figure 1As shown, the device mainly includes a base 1, a support frame 2, a conveying assembly, a heating assembly, a heat preservation assembly, and a cooling assembly. The base 1 serves as the foundation of the entire device, on which the support frame 2 is fixedly mounted. The support frame 2 is made of high-strength steel, possessing sufficient rigidity and stability to support the various functional components. A guide rail 3 is provided at the top of the support frame 2, extending along its length to guide the movement of the carrying pallet 4. Rollers are installed at the bottom of the carrying pallet 4, and these rollers slide in conjunction with the guide rail 3. The movement of the carrying pallet 4 on the guide rail 3 is achieved by a drive motor 5 driving a transmission chain 6. The transmission chain 6 meshes with the rollers, thereby transmitting power to the carrying pallet 4.

[0023] like Figure 1 As shown, the heating assembly is located at one end of the support frame 2, including a heating chamber 7. The heating chamber 7 is fixed to the top of the support frame 2 and connected to the guide rail 3. Electric heating tubes 8 are installed inside the heating chamber 7. The electric heating tubes 8 are arranged in a spiral shape and evenly distributed around the inner wall of the heating chamber 7. The outer side of the electric heating tubes 8 is wrapped with a high-temperature resistant ceramic layer, which effectively prevents heat loss and improves heating efficiency. A reflective layer is also provided on the inner wall of the heating chamber 7. The reflective layer is made of polished stainless steel and is positioned close to the inner wall of the heating chamber 7. Figure 2 As shown, the reflective layer can evenly reflect the heat emitted by the electric heating tube 8 into the interior of the heating chamber 7, ensuring a more uniform temperature distribution during the heating process. A smoke exhaust duct 9 is installed at the top of the heating chamber 7, connected to an external dust removal system to discharge waste gas generated during heating. The heating chamber 7 has an inlet and an outlet at both ends, each equipped with a heat insulation curtain 10 made of flexible, high-temperature resistant material. Positioned close to the edge of the opening, the curtain automatically unfolds when the carrying tray 4 passes through and returns to its original position afterward, thereby reducing heat loss.

[0024] Downstream of the heating component is an insulation component, which includes an insulation box 11. The insulation box 11 is fixed to the top of the support frame 2 and connected to the heating box 7. The insulation box 11 contains multiple layers of insulation boards 12, with nano-aerogel material filling the spaces between the insulation boards. This nano-aerogel material has extremely low thermal conductivity, significantly reducing heat loss. A temperature sensor 13 is installed on the top of the insulation box 11, electrically connected to an external control system for real-time monitoring of temperature changes within the insulation box 11. The insulation box 11 has an inlet and an outlet at each end, both equipped with automatic regulating doors 14. These doors are driven by pneumatic actuators, which control the opening and closing of the doors based on the movement signal of the carrying tray 4. The insulation box 11 is also equipped with a circulating fan 20. The circulating fan 20 is fixed to the top of the insulation box 11. Its air inlet is connected to the inside of the insulation box 11, and its air outlet is equipped with a guide plate 21. The guide plate 21 is used to guide the airflow to be evenly distributed inside the insulation box 11, thereby maintaining the uniformity of the temperature inside the box.

[0025] Downstream of the insulation component is the cooling component, which includes a cooling box 15. The cooling box 15 is fixed to the top of the support frame 2 and connected to the insulation box 11. Multiple spray nozzles 16 are installed inside the cooling box 15, evenly distributed on the top. These nozzles are connected to an external coolant supply system via pipes to spray coolant into the cooling box 15. A collection tank 17 is located at the bottom of the cooling box 15, connected to a coolant recovery system via pipes to collect the sprayed coolant. A filter screen 23 is installed above the collection tank 17 to intercept impurities in the coolant and prevent them from entering the coolant recovery system. Inlet and outlet pipes are located at both ends of the cooling box 15, and air curtains 18 are installed at both ends to prevent outside air from entering the cooling box 15, thus avoiding the influence of the external environment on the cooling process. The cooling box 15 is also equipped with a temperature monitoring probe 22, which is electrically connected to the external control system to monitor the temperature change inside the cooling box 15 in real time. When the temperature exceeds the set value, the control system activates the spray head 16 to cool down.

[0026] The upper surface of the carrying pallet 4 has multiple positioning grooves, each containing an elastic clamping element 19 made of spring steel sheet. These clamping elements are positioned close to the inner wall of the positioning groove to fix the position of the alloy steel pipe and prevent displacement during transport. Limiting blocks 25 are installed at both ends of the guide rail 3 to restrict the movement range of the carrying pallet 4 and prevent it from detaching from the guide rail 3. A shock-absorbing pad 24, made of rubber, is installed at the bottom of the support frame 2. This pad is positioned close to the upper surface of the base 1 to absorb vibrations generated during operation, thereby improving the stability of the device.

[0027] The specific operation process of this utility model is as follows: First, the alloy steel pipe to be processed is placed in the positioning groove of the support tray 4, and its position is fixed by the elastic clamp 19. After the drive motor 5 is started, the support tray 4 is moved along the guide rail 3 by the transmission chain 6. The support tray 4 passes through the heating component, the heat preservation component, and the cooling component in sequence. In the heating component, the electric heating tube 8 heats the inside of the heating box 7, and the reflective layer evenly reflects the heat into the inside of the heating box 7. The alloy steel pipe on the support tray 4 completes the heating process in the heating box 7. Then the support tray 4 enters the heat preservation component. The multi-layer heat insulation board 12 and nano aerogel material in the heat preservation box 11 significantly reduce heat loss. The circulating fan 20 and the guide plate 21 ensure the uniformity of temperature in the box. The alloy steel pipe completes the heat preservation process in the heat preservation box 11. Finally, the support tray 4 enters the cooling component. The spray head 16 sprays coolant into the cooling box 15 according to the feedback signal of the temperature monitoring probe 22. The alloy steel pipe completes the cooling process in the cooling box 15. Throughout the process, the smooth movement of the support tray 4 ensures the smooth transition of the alloy steel pipe between different processes, avoiding the temperature fluctuation problem caused by process switching in traditional segmented operations.

[0028] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0029] In practical applications, this device is mainly used for the continuous heat treatment process of high-strength alloy steel pipes. Taking a manufacturing company as an example, its production process requires heating high-strength alloy steel pipes with a length of 2 meters and a diameter of 100 millimeters to 850°C, holding them at that temperature for 30 minutes, and then rapidly cooling them to room temperature. The following are the specific steps and principles of this process achieved using this device:

[0030] First, the operator places the alloy steel pipe to be processed into the positioning slot of the carrier pallet 4. The elastic clamping element 19 on the carrier pallet 4 is made of spring steel sheet, and its design of closely adhering to the inner wall of the positioning slot can effectively fix the position of the alloy steel pipe and prevent it from shifting during transportation. The key to this design lies in the elasticity and friction of the elastic clamping element 19, which can ensure clamping force while avoiding damage to the surface of the steel pipe. Subsequently, the drive motor 5 starts, and through the transmission chain 6, it drives the carrier pallet 4 to move smoothly along the guide rail 3 and enter the heating assembly.

[0031] When the carrying tray 4 enters the heating chamber 7, the electric heating tubes 8 begin to operate. Their spiral arrangement and the high-temperature resistant ceramic layer wrapped around their outer surface significantly improve heating efficiency and reduce heat loss. The reflective layer on the inner wall of the heating chamber 7 is made of polished stainless steel, and its close-fitting design evenly reflects the heat emitted by the electric heating tubes 8 into the chamber, ensuring a more uniform temperature distribution during the heating process. The heat insulation curtains 10 at both ends of the heating chamber 7 play a crucial role in this process. Made of flexible, high-temperature resistant material, the heat insulation curtains 10 automatically unfold and return to their original position, effectively reducing heat loss and preventing cold air from entering the chamber and affecting the heating effect. The exhaust duct 9 is connected to an external dust removal system to exhaust the waste gas generated during the heating process, ensuring a clean working environment.

[0032] After the heating process is completed, the carrying tray 4 enters the insulated chamber 11. The insulated chamber 11 has multiple layers of insulation boards 12, with nano-aerogel material filling the spaces between them. This material has an extremely low thermal conductivity, significantly reducing heat loss and maintaining temperature stability within the chamber. A temperature sensor 13 monitors temperature changes within the insulated chamber 11 in real time and transmits the data to an external control system, ensuring the temperature remains within the set range. A circulating fan 20 at the top of the insulated chamber 11 guides airflow evenly throughout the chamber via a guide plate 21, further ensuring temperature uniformity. The key to this design lies in the synergistic effect of the circulating fan 20 and the guide plate 21, which effectively eliminates any potential temperature gradients within the chamber, thereby improving the insulation effect.

[0033] Subsequently, the carrying tray 4 enters the cooling chamber 15. The spray nozzles 16 at the top of the cooling chamber 15 spray coolant into the chamber based on feedback signals from the temperature monitoring probe 22, thereby achieving rapid cooling. The temperature monitoring probe 22 monitors the temperature changes inside the cooling chamber 15 in real time and transmits the data to the external control system. When the temperature exceeds the set value, the control system activates the spray nozzles 16 for cooling. The key to this design lies in the distribution density and spray angle of the spray nozzles 16, ensuring that the coolant evenly covers the surface of the alloy steel pipe, thus achieving a rapid and uniform cooling effect. The liquid collection tank 17 at the bottom of the cooling chamber 15 is connected to the coolant recovery system via pipes to collect the sprayed coolant, while the filter screen 23 above the collection tank 17 intercepts impurities in the coolant, preventing them from entering the recovery system. Furthermore, the air curtains 18 at both ends of the cooling chamber 15 isolate outside air from entering the chamber, thereby avoiding the influence of the external environment on the cooling process.

[0034] Throughout the entire operation, the smooth movement of the support pallet 4 is crucial to ensuring process continuity. The limiting blocks 25 at both ends of the guide rail 3 restrict the movement range of the support pallet 4, preventing it from derailing, while the shock-absorbing pads 24 at the bottom of the support frame 2 absorb vibrations generated during operation, thereby improving the stability of the device. The key to this design lies in the synergistic effect of the limiting blocks 25 and the shock-absorbing pads 24, which effectively prevents process interruptions caused by vibration or displacement.

[0035] Through the above steps, this device achieves a continuous heat treatment process for alloy steel pipes, from heating to cooling. Its core advantage lies in the synergistic cooperation between its components: the heating component ensures heating effectiveness through efficient heating and uniform heat distribution; the insulation component achieves stable insulation through multi-layer insulation and temperature uniformity control; and the cooling component achieves rapid cooling through precise temperature monitoring and coolant spraying. These designs collectively solve the temperature fluctuation problem caused by process switching in traditional segmented operations, thereby improving the stability and efficiency of the heat treatment process.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous heat treatment device for alloy steel pipes, comprising a base (1) on which a support frame (2) is fixedly arranged, characterized in that, Also includes: Conveying components; The conveying assembly includes a guide rail (3) fixed to the top of the support frame (2), and multiple spaced carrier trays (4) are slidably connected in the guide rail (3). Rollers are provided at the bottom of the carrier trays (4), and the rollers cooperate with the guide rail (3). The carrier trays (4) are used to place the alloy steel pipes to be processed. A drive motor (5) is fixedly provided on one side of the support frame (2). The output shaft of the drive motor (5) is connected to a transmission chain (6). The transmission chain (6) meshes with the rollers at the bottom of the carrier trays (4) to drive the carrier trays (4) to move along the guide rail (3). Heating assembly; The heating assembly is located at one end of the support frame (2). The heating assembly includes a heating box (7) fixed to the top of the support frame (2). An electric heating tube (8) is installed inside the heating box (7). The electric heating tube (8) is arranged in a spiral shape. The electric heating tube (8) is wrapped with a high-temperature resistant ceramic layer. A smoke exhaust pipe (9) is installed on the top of the heating box (7). The smoke exhaust pipe (9) is connected to an external dust removal system. An inlet and an outlet are opened at both ends of the heating box (7). A heat insulation curtain (10) is installed at both the inlet and the outlet. The heat insulation curtain (10) is made of flexible high-temperature resistant material. Thermal insulation components; The heat insulation component is located downstream of the heating component. The heat insulation component includes a heat insulation box (11) fixed to the top of the support frame (2). The heat insulation box (11) is provided with multiple layers of heat insulation boards (12). The space between the heat insulation boards (12) is filled with nano aerogel material. A temperature sensor (13) is provided on the top of the heat insulation box (11). The temperature sensor (13) is electrically connected to the external control system. The heat insulation box (11) has an inlet and an outlet at both ends. An automatic adjustment door (14) is provided at both the inlet and the outlet. The automatic adjustment door (14) is driven by a pneumatic actuator. Cooling assembly; the cooling assembly is located downstream of the insulation assembly. The cooling assembly includes a cooling box (15) fixed to the top of the support frame (2). Multiple spray heads (16) are provided inside the cooling box (15). The spray heads (16) are connected to the external coolant supply system. A liquid collection tank (17) is provided at the bottom of the cooling box (15). The liquid collection tank (17) is connected to the coolant recovery system through a pipe. An inlet and an outlet are respectively opened at both ends of the cooling box (15). An air curtain (18) is provided at both the inlet and the outlet. The air curtain (18) is used to prevent outside air from entering the cooling box (15).

2. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by, The upper surface of the carrying tray (4) is provided with multiple positioning grooves, and an elastic clamping member (19) is provided in the positioning groove. The elastic clamping member (19) is made of spring steel sheet.

3. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by, The inner wall of the heating box (7) is provided with a reflective layer, which is made of polished stainless steel.

4. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by The insulation box (11) is equipped with a circulating fan (20), which is fixed to the top of the insulation box (11). The air outlet of the circulating fan (20) is equipped with a guide plate (21).

5. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by, The cooling box (15) is provided with a temperature monitoring probe (22) which is electrically connected with an external control system.

6. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by, The cooling box (15) is provided with a filter screen (23) above the liquid collecting groove (17).

7. The alloy steel tube continuous heat treatment apparatus according to claim 1, characterized by, The support frame (2) is provided with a shock-absorbing pad (24) at the bottom, the shock-absorbing pad (24) is made of rubber material, and the guide rail (3) is provided with a limiting block (25) at each end.

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