A heat treatment apparatus for pipe welding

Abstract

The utility model discloses a heat treatment equipment for welded pipe processing relates to heat treatment technical field, including base, the surface fixed connection of base has the guide platform, and the both ends of guide platform are provided with outer conveying roller way, and the middle section position fixed setting of guide platform has main box, and main box is surrounded to the middle section of guide platform and is set, and its top fixed connection has water tank and fan mechanism, and the middle section surface equidistance of guide platform is provided with multiple cooling assemblies. The main box of closed double -deck setting formed the closed cooling chamber, can effectively avoid water vapor and spray to the diffusion of workshop environment, greatly improve the working environment, combine condensing recovery unit simultaneously, can realize the closed -loop circulation utilization of cooling medium, reduce water resource consumption, reduced production cost and environmental burden.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment, and in particular to a heat treatment device for welded pipe processing. Background Technology

[0002] In the field of welded pipe processing, heat treatment is a key process for improving the mechanical properties of products, eliminating internal stress, and obtaining a stable microstructure. Among these processes, the cooling stage is the core step that determines the final microstructure and properties. However, traditional heat treatment cooling methods have the following drawbacks: The widely used static air cooling method is inefficient, has a long production cycle, and poor cooling uniformity, easily leading to deformation problems such as warping and excessive ovality of welded pipes. While immersion water quenching provides rapid cooling, the intense heat exchange forms a stubborn vapor film on the surface of the welded pipe (Leiden-Frost effect), which hinders cooling and causes a surge in internal stress due to the huge instantaneous temperature difference, even causing the steel pipe to crack. Ordinary air cooling or water mist cooling cannot precisely control the cooling intensity and uniformity, making it difficult to achieve both cooling efficiency and uniformity.

[0003] During the quenching process, a large amount of high-temperature steam is generated and fills the entire workshop, which not only deteriorates the working environment, but also corrodes the overhead cranes and electrical equipment in the workshop, posing a safety hazard. At the same time, traditional open quenching consumes a huge amount of water, and the cooling water is discharged after one use, which wastes water resources and increases the cost of sewage treatment. Traditional spray systems use internal mixing nozzles, which are prone to clogging due to water quality issues, requiring frequent shutdowns for cleaning and maintenance, severely impacting production efficiency and equipment uptime. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a heat treatment device for welded pipe processing, which solves the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A heat treatment equipment for welded pipe processing includes a base, a guide platform fixedly connected to the surface of the base, external conveying rollers provided at both ends of the guide platform, a main housing fixedly provided in the middle section of the guide platform, the main housing surrounding the middle section of the guide platform, a water tank and a fan mechanism fixedly connected to its top, multiple sets of cooling components equidistantly arranged on the middle section surface of the guide platform, the cooling components including a cooling ring and a guide roller, the cooling ring being connected to the guide platform through a first fixed frame, its top being connected to the water tank and the fan mechanism respectively through connecting pipes, the guide roller being connected to the base through a second fixed frame, its roller surface height being consistent with the height of the inner wall of the cooling ring, the cooling ring having an annular double channel inside, including an inner ring channel and an outer ring channel, the surface of the inner ring channel being distributed with atomizing nozzles, the surface of the outer ring channel being distributed with airflow nozzles, the main housing being a closed double-layer housing structure, its interlayer being filled with heat insulation material, arc-shaped openings with sealing layers being opened at both longitudinal ends, a suction port being opened on the surface of the guide platform, the suction port being connected to an external condensation recovery unit through a pipe.

[0006] As a further technical solution of this utility model, both the atomizing nozzle and the airflow nozzle are external mixing nozzles.

[0007] As a further technical solution of this utility model, the cooling ring, airflow nozzle and water flow nozzle are all made of stainless steel, and the vortex core inside the water flow nozzle is made of tungsten carbide.

[0008] As a further technical solution of this utility model, the guide roller is made of heat-resistant stainless steel, and its surface is provided with anti-slip stripes and a high-temperature resistant ceramic coating.

[0009] As a further technical solution of this utility model, a servo water valve and a proportional air valve are respectively provided on the water circuit and air circuit of the cooling ring, and both the water circuit and the air circuit are made of 304 stainless steel pipe.

[0010] As a further technical solution of this utility model, non-contact infrared thermometers are provided at the arc-shaped openings at both ends of the main body.

[0011] As a further technical solution of this utility model, the condensation recovery unit includes a condenser, a water-air separator and a recovery water pump, wherein the outlet of the recovery water pump is connected to a water tank.

[0012] As a further technical solution of this utility model, 3-5 sets of cooling rings are arranged along the axial direction of the guide table, and the guide rollers are distributed between each cooling ring.

[0013] As a further technical solution of this utility model, the inner wall of the steel plate of the main box is provided with a high temperature resistant and anti-corrosion coating, and the sealing layer inside the arc-shaped opening is made of flexible ceramic fiber material.

[0014] As a further technical solution of this utility model, the interlayer of the main box is filled with ceramic fiber cotton.

[0015] This utility model provides a heat treatment device for welded pipe processing, which has the following advantages compared with the prior art: 1. The heat treatment equipment for welded pipe processing designed in this paper has a closed double-layer main box that forms a closed cooling chamber, which can effectively prevent the diffusion of water vapor and spray into the workshop environment, greatly improving the working environment. At the same time, combined with the condensation recovery unit, it can realize the closed-loop recycling of the cooling medium, reduce water consumption, and reduce production costs and environmental burden.

[0016] This design presents a heat treatment device for welded pipe processing, featuring multiple sets of dual-channel cooling rings. The device employs an externally mixed dual-channel design, utilizing a high-speed air curtain to break down the vapor insulation film on the steel pipe surface. Subsequently, water mist is sprayed out to directly contact the high-temperature surface and evaporate violently, ensuring extremely high heat exchange efficiency and uniform cooling. This effectively prevents workpiece deformation and solves the problem of nozzle clogging.

[0017] This design presents a heat treatment device for welded pipe processing. By using guide rollers with a high-temperature resistant ceramic coating, the guide rollers are ensured to operate for a long time in harsh environments with high temperature and high humidity without deformation or wear. They provide stable and precise support and guidance for the welded pipe, while ensuring that the welded pipe remains in the center during the cooling process, which is beneficial for subsequent uniform cooling operations.

[0018] This design presents a heat treatment device for welded pipe processing. The overall device is equipped with multiple temperature measuring mechanisms, which can monitor the temperature of the steel pipe in real time and achieve effective subsequent cooling treatment. At the same time, the cooling process is divided into multiple controllable stages. In actual use, gradient cooling or isothermal cooling control can be performed for different stages of steel pipe temperature. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a heat treatment equipment for welded pipe processing. Figure 2 This is a schematic diagram of the internal structure of a heat treatment equipment for welded pipe processing. Figure 3 A heat treatment device for welded pipe processing Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a front view of a cooling ring connection structure for a heat treatment equipment used in welded pipe processing.

[0020] In the diagram: 1. Base; 2. Guide platform; 3. Outer conveyor roller; 4. Main housing; 5. Water tank; 6. Fan mechanism; 7. Cooling assembly; 8. Cooling ring; 9. Suction port; 10. First fixed frame; 11. Guide roller; 12. Second fixed frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a heat treatment equipment solution for welded pipe processing: it includes a rectangular horizontally arranged base 1, a guide platform 2 fixedly connected to the surface of the base 1, external conveying rollers 3 provided at both ends of the guide platform 2, a main box 4 fixedly arranged in the middle section of the guide platform 2, the main box 4 being located at the top center of the base 1 and surrounding the middle section of the guide platform 2, a water tank 5 and a fan mechanism 6 fixedly connected to the top of the main box 4, and multiple sets of cooling components 7 equidistantly arranged on the middle section surface of the guide platform 2; The cooling assembly 7 includes adjacent cooling rings 8 and guide rollers 11. Both sides of the cooling rings 8 are fixedly connected to a first fixing frame 10, which is also fixedly connected to the surface of the guide platform 2. The top of the cooling rings 8 is also connected to the water tank 5 and the fan mechanism 6. The guide rollers 11 are arranged longitudinally, and one end of them is fixedly connected to a second fixing frame 12, which is also connected to the surface of the base 1. A temperature detection mechanism is also provided on the outside of the second fixing frame 12.

[0023] like Figure 1-2 As shown, the main housing 4 is a closed double-layer housing structure, which is welded from steel plates and filled with ceramic fiber cotton in the interlayer. The inner wall of the steel plate is coated with a high-temperature resistant and anti-corrosion coating. Both ends of the main housing 4 have arc-shaped openings, and the inner surface of the arc-shaped openings is coated with a flexible ceramic fiber sealing layer. Each arc-shaped opening at both ends of the main housing 4 is equipped with a non-contact infrared thermometer to measure the initial temperature of the welded pipe before it enters the cooling section. The guide platform 2 is arranged in a rectangular horizontal direction along the surface of the base 1, with "Z"-shaped protrusions at both ends. The middle section inside the main housing 4 is horizontally recessed for support. The first fixing frame 10 and the second fixing frame 12 are both arranged in a rectangular vertical direction.

[0024] like Figure 3-4As shown, 3-5 sets of cooling rings 8 are arranged along the axial direction of the guide platform 2, and an annular double channel is provided inside. The inner wall is provided with inner and outer ring channels. The surface of the inner ring channel is distributed with atomizing nozzles in an annular shape at equal intervals, and the nozzles are adjustable nozzles. The outer ring channel is arranged in an annular shape around the inner ring channel, and its surface is also provided with annular airflow nozzles at equal intervals. The double channels in the cooling ring 8 are connected to the water tank 5 and the fan mechanism 6 respectively through connecting pipes. The airflow nozzles and water flow nozzles are all external mixing nozzles. The cooling ring 8 and its corresponding airflow nozzles and water flow nozzles are all made of stainless steel. The vortex core inside the water flow nozzle is made of tungsten carbide. The guide rollers 11 are distributed in each set of cooling rings 8. The guide roller 11 is made of heat-resistant stainless steel and its surface is provided with anti-slip stripes. The roller surface height is the same as the inner wall of the cooling ring 8. Its surface is provided with a high-temperature resistant ceramic coating. Multiple sets of suction ports 9 are equidistantly opened along the surface of the guide table 2. At the same time, the cooling rings 8 are distributed at intervals. Their bottom ends are connected to the external negative pressure mechanism through pipes. The external negative pressure mechanism is equipped with a condensation recovery unit, which includes a condenser, a water vapor separator, a demister, and a recovery water pump. In actual use, the extracted steam and water mist condense into water in the condenser. After purification, the water is sent back to the water tank 5 by the recovery water pump for recycling. This can effectively realize the closed-loop utilization of water resources, close to zero emissions, thereby reducing environmental impact and reducing water consumption.

[0025] In this device, the corresponding water and air circuits connecting to the cooling ring 8 are equipped with servo water valves and proportional air valves controlled by electrical signals, and the water and air circuits are all made of 304 stainless steel. At the same time, the whole device is equipped with an industrial PLC and human-machine control system.

[0026] The working principle of this utility model is as follows: the external welded pipe is conveyed from the opening at one end of the main housing 4 through the external conveyor roller 3 into the main housing 4. Then, multiple sets of cooling components 7 are set on the surface of the guide table 2 in sequence. The dual channels set in the cooling ring 8 simultaneously spray high-pressure air and water. The water is atomized into extremely fine droplets and sprayed out, while the high-pressure air is sprayed out from the slit to form an air curtain that wraps the water mist, which is precisely pushed onto the surface of the welded pipe. The high-speed air curtain first destroys the steam insulation film on the surface of the welded pipe. Then, the water mist comes into contact with the high-temperature surface instantly, evaporates violently, and then carries away a large amount of heat, completing the cooling process. When the welded pipe passes through a set of cooling rings 8, the guide rollers 11 set adjacent to it provide phased support and guidance for the welded pipe until the welded pipe is cooled and moved out of the main housing 4. The openings at both ends of the main housing 4 allow the steel pipe to pass through but can effectively prevent the leakage of water mist and steam.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A heat treatment device for welded pipe processing, comprising a base (1), a guide platform (2) fixedly connected to the surface of the base (1), and external conveying rollers (3) provided at both ends of the guide platform (2), characterized in that: A main box (4) is fixedly installed in the middle section of the guide platform (2). The main box (4) surrounds the middle section of the guide platform (2). A water tank (5) and a fan mechanism (6) are fixedly connected to its top. Multiple sets of cooling components (7) are equidistantly arranged on the surface of the middle section of the guide platform (2). The cooling assembly (7) includes a cooling ring (8) and a guide roller (11). The cooling ring (8) is connected to the guide platform (2) through the first fixed frame (10). Its top is connected to the water tank (5) and the fan mechanism (6) through the connecting pipe. The guide roller (11) is connected to the base (1) through the second fixed frame (12). Its roller surface height is consistent with the height of the inner wall of the cooling ring (8). The cooling ring (8) is provided with an annular double channel, including an inner ring channel and an outer ring channel. The surface of the inner ring channel is distributed with atomizing nozzles, and the surface of the outer ring channel is distributed with airflow nozzles. The main box (4) is a closed double-layer box structure. Its interlayer is filled with heat insulation material. Arc-shaped openings with sealing layers are opened at both ends of the longitudinal direction. The surface of the guide platform (2) is provided with a suction port (9). The suction port (9) is connected to the external condensation recovery unit through a pipe.

2. The heat treatment equipment for welded pipe processing according to claim 1, characterized in that: Both the atomizing nozzle and the airflow nozzle are external mixing nozzles.

3. A heat treatment device for welded pipe processing according to claim 1 or 2, characterized in that: The cooling ring (8), airflow nozzle and water flow nozzle are all made of stainless steel, and the vortex core inside the water flow nozzle is made of tungsten carbide.

4. The heat treatment equipment for welded pipe processing according to claim 1, characterized in that: The guide roller (11) is made of heat-resistant stainless steel and has anti-slip stripes and a high-temperature resistant ceramic coating on its surface.

5. A heat treatment device for welded pipe processing according to claim 1, characterized in that: The cooling ring (8) is equipped with a servo water valve and a proportional air valve on the water and air paths respectively, and both the water and air paths are made of 304 stainless steel pipes.

6. The heat treatment equipment for welded pipe processing according to claim 1, characterized in that: Non-contact infrared thermometers are installed at the arc-shaped openings at both ends of the main body (4) in the longitudinal direction.

7. A heat treatment device for welded pipe processing according to claim 1, characterized in that: The condensation recovery unit includes a condenser, a water-air separator, and a recovery water pump. The outlet of the recovery water pump is connected to the water tank (5).

8. A heat treatment device for welded pipe processing according to claim 1, characterized in that: The cooling rings (8) are arranged in 3-5 groups along the axial direction of the guide platform (2), and the guide rollers (11) are distributed between each cooling ring (8).

9. A heat treatment device for welded pipe processing according to claim 1, characterized in that: The inner wall of the steel plate of the main box (4) is provided with a high temperature resistant and anti-corrosion coating, and the sealing layer inside the arc-shaped opening is made of flexible ceramic fiber material.

10. A heat treatment device for welded pipe processing according to claim 1, characterized in that: The interlayer of the main box (4) is filled with ceramic fiber cotton.

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