DX atmosphere heat treatment furnace steel pipe rapid cooling device

Abstract

A rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace includes a cooling box, rollers, a fan, air ducts, and an air inlet box. One end of the cooling box forms an inlet, and the other end forms an outlet. The interior of the cooling box constitutes a cooling chamber. Multiple rollers are arranged at intervals along the length of the cooling chamber to transport the steel pipes to be cooled from the inlet to the outlet. The two ends of each roller are rotatably connected to a pair of side walls of the cooling box. The fan is located at the top of the cooling box. The device is characterized by having a pair of air ducts corresponding to each fan, symmetrically arranged between the side walls above and below the steel pipes to be cooled. One end of the air inlet box is connected to the fan, and the other end is connected to the pair of air ducts. Multiple air outlets are spaced along the length of the pair of air ducts to blow cold air onto the steel pipes to be cooled. The air outlets on the pair of air ducts are inclined towards the outlet. Advantages: It expands the cooling circulation range, more efficiently delivers cold air to the surface of the steel pipe, accelerates the cooling of the steel pipe, and improves the cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe production technology, specifically relating to a rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace. Background Technology

[0002] DX atmosphere heat treatment furnace steel pipe, hereinafter referred to as DX atmosphere furnace steel pipe, also known as heat exchanger tube, is a special-purpose steel pipe, mainly used in large steam turbine generator sets in thermal power plants, nuclear power plants and other applications.

[0003] The internal microstructure and final properties (such as high-temperature strength, low coefficient of expansion, and dimensional stability) of DX atmosphere furnace steel tubes are almost entirely determined by the heat treatment process, with rapid cooling being the most critical step. The rapid cooling device for DX atmosphere furnace steel tubes is one of the heart components of the DX atmosphere furnace steel tube heat treatment production line, determining the core performance of the product. It mainly includes a cooling fan, air inlet box, air ducts, and a conveying mechanism for the steel tubes. The core task of the air ducts is to deliver the high-pressure, high-volume air generated by the cooling fan to the surface of the DX atmosphere furnace steel tubes that need cooling. In existing rapid cooling devices for DX atmosphere furnace steel tubes, air ducts are typically installed above and below the steel tubes, with air inlets facing each other on both sides, directly blowing air onto the steel tubes. Through convection, fresh cold air is continuously delivered to the surface of the steel tubes, carrying away hot air. However, the circulation scale is small, resulting in poor cooling effect.

[0004] In view of the above-mentioned existing technology, it is necessary to improve the structure of the existing DX atmosphere furnace steel tube rapid cooling device. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0005] The purpose of this invention is to provide a rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace that has a simple and reasonable structure, fast cooling speed, and good effect.

[0006] The purpose of this utility model is achieved as follows: a rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace includes a cooling box, rollers, a fan, air ducts, and an air inlet box. The cooling box has an inlet at one end along its length and an outlet at the other end. The cooling box is configured as a cooling chamber. Multiple rollers are arranged at intervals along the length of the cooling chamber to transport the steel pipes to be cooled from the inlet to the outlet. The two ends of each roller are rotatably connected to a pair of side walls of the cooling box. The fan is located at the top of the cooling box, and each fan has a pair of air ducts. The pair of air ducts are symmetrically arranged between the pair of side walls, one above the other, to cool the steel pipes. One end of the air inlet box is connected to the fan, and the other end is connected to the pair of air ducts. The pair of air ducts have multiple outlet holes spaced along their length to blow cold air onto the steel pipes to be cooled. The outlet holes on the pair of air ducts are inclined towards the outlet.

[0007] In one specific embodiment of this utility model, the air outlet is an elongated hole.

[0008] In another specific embodiment of this utility model, the angle α between the air outlet direction and the vertical direction is 25 to 45 degrees.

[0009] In another specific embodiment of this utility model, the cooling box is supported by a box frame.

[0010] In another specific embodiment of this utility model, a pair of side walls of the cooling box are provided with roller bearing seats corresponding to the rollers, and the rollers have roller shafts at both ends. The roller shafts are installed in conjunction with the roller bearing seats. A sprocket driven by an external drive mechanism is also provided on the roller shaft, and the rollers are rotated by the sprocket.

[0011] In another specific embodiment of this utility model, there are multiple fans, which are spaced apart on the top of the cooling box along the length of the cooling box.

[0012] In a further specific embodiment of this utility model, the fan is equipped with a frame and a fan motor, the fan and the fan motor are supported on the frame, and the fan is driven by the fan motor.

[0013] In a further specific embodiment of this utility model, one end of the air inlet box is connected to the fan through a fan connector, and the other end is provided with a duct connector. The cooling box has a duct clearance hole on one of its two side walls near the air inlet box. One end of the duct passes through the duct clearance hole and is fixed to the side wall through a duct fixing plate. The end of the duct is connected to the air inlet box through a duct connector.

[0014] The present invention, due to the above-mentioned structure, has the following advantages compared with the prior art: the air outlet is inclined towards the outlet pipe, which can expand the coverage area of ​​the cold air on the steel pipe, increase the range of cooling circulation, and more efficiently discharge heat to the outside of the cooling box, accelerate the cooling of the steel pipe, and improve the cooling effect. Attached Figure Description

[0015] Figure 1 This is a front structural diagram of the present invention;

[0016] Figure 2 This is a side view of the present invention.

[0017] In the diagram: 1. Cooling box, 11. Inlet pipe, 12. Outlet pipe, 13. Cooling chamber, 14. Side wall, 141. Air duct clearance hole; 2. Idler roller, 21. Idler roller bearing seat, 22. Idler roller shaft, 23. Sprocket; 3. Fan, 31. Frame, 32. Fan motor; 4. Air duct, 41. Air outlet, 42. Air duct fixing plate; 5. Air inlet box, 51. Fan connector, 52. Air duct connector; 6. Box frame; 7. Steel pipe to be cooled. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0019] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Please see Figure 1 and Figure 2This utility model relates to a rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace, comprising a cooling box 1, rollers 2, a fan 3, an air duct 4, and an air inlet box 5. The cooling box 1 is supported by a frame 6. One end of the cooling box 1 has an inlet 11, and the other end has an outlet 12. The interior of the cooling box 1 forms a cooling chamber 13. Multiple rollers 2 are arranged at intervals along the length of the cooling chamber 13 to transport the steel pipes 7 to be cooled from the inlet 11 to the outlet 12. The two ends of each roller 2 are rotatably connected to a pair of side walls 14 of the cooling box 1. Specifically, roller bearing seats 21 are provided on the pair of side walls 14 of the cooling box 1 corresponding to the rollers 2. Each roller 2 has roller shafts 22 at both ends, which are fitted with the roller bearing seats 21. A sprocket 23 driven by an external drive mechanism is also provided on the roller shaft 22, which drives the roller 2 to rotate. The fan 3 is located on top of the cooling box 1. The number of fans 3 can be increased appropriately according to the length of the cooling box 1. In this embodiment, there are two fans, spaced apart along the length of the cooling box 1. Each fan 3 is equipped with a frame 31 and a fan motor 32. The fan 3 and the fan motor 32 are supported on the frame 31, and the fan 3 is driven by the fan motor 32. Each fan 3 has a pair of air ducts 4, which are symmetrically arranged between the pair of side walls 14 opposite to the cooling steel pipes 7. The cooling box 1 has an air duct clearance hole 141 on the side wall 14 closest to the air inlet box 5. One end of the air duct 4 passes through the air duct clearance hole 141 and is fixed to the side wall 14 by an air duct fixing plate 42. One end of the air inlet box 5 is connected to the fan 3 through a fan connector 51, and the other end is connected to the pair of air ducts 4 through an air duct connector 52. The pair of air ducts 4 are provided with a plurality of air outlet holes 41 spaced apart along their length to blow cold air toward the steel pipe 7 to be cooled. The air outlet holes 41 are elongated holes. The air outlet holes 41 on the pair of air ducts 4 are inclined toward the outlet 12. Preferably, the angle α between the air outlet direction of the air outlet hole 41 and the vertical direction is 25 to 45 degrees. In this embodiment, it is set to 30 degrees.

[0021] This invention features air ducts 4 positioned above and below the steel pipe 7 to be cooled. A pair of air ducts 4 have a series of evenly distributed air outlet holes 41 angled towards the outlet 12, forming a high-speed air curtain to cool the steel pipe 7 as it moves towards the outlet 12. The air outlet holes 41, instead of blowing vertically towards the steel pipe 7, are now angled towards it, increasing the coverage area of ​​the air curtain on the steel pipe, expanding the cold air circulation range, and quickly dissipating heat towards the outlet duct 12, further enhancing the cooling effect and achieving the invention's objective.

Claims

1. A rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace, comprising a cooling box (1), rollers (2), a fan (3), an air duct (4), and an air inlet box (5), wherein the cooling box (1) has an inlet (11) at one end along its length and an outlet (12) at the other end, and the cooling box (1) is configured as a cooling chamber (13), wherein there are multiple rollers (2) arranged at intervals along the length of the cooling chamber (13) for conveying the steel pipe (7) to be cooled from the inlet (11) to the outlet (12), wherein the two ends of each roller (2) are rotatably connected to a pair of side walls (14) of the cooling box (1), and the fan (3) is disposed on the top of the cooling box (1), characterized in that: A fan (3) has a pair of air ducts (4) which are symmetrically arranged between the pair of side walls (14) and the steel pipe (7) to be cooled. One end of the air inlet box (5) is connected to the fan (3), and the other end is connected to the pair of air ducts (4). The pair of air ducts (4) are provided with multiple air outlets (41) along the length direction to blow cold air to the steel pipe (7) to be cooled. The air outlets (41) on the pair of air ducts (4) are inclined towards the outlet (12).

2. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: The air outlet (41) is an elongated hole.

3. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: The angle α between the air outlet (41) and the vertical direction is 25 to 45 degrees.

4. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: The cooling box (1) is supported by a frame (6).

5. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: The cooling box (1) has roller bearing seats (21) on a pair of side walls (14) corresponding to the roller (2). The roller (2) has roller shafts (22) at both ends. The roller shafts (22) are installed in conjunction with the roller bearing seats (21). The roller shafts (22) are also equipped with sprockets (23) driven by an external drive mechanism. The roller (2) is driven to rotate by the sprockets (23).

6. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: There are multiple fans (3), which are spaced apart on the top of the cooling box (1) along the length of the cooling box (1).

7. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: The fan (3) is equipped with a frame (31) and a fan motor (32), the fan (3) and the fan motor (32) are supported on the frame (31), and the fan (3) is driven by the fan motor (32).

8. The rapid cooling device for steel pipes in a DX atmosphere heat treatment furnace according to claim 1, characterized in that: One end of the air inlet box (5) is connected to the fan (3) through the fan connector (51), and the other end is provided with a duct connector (52). The cooling box (1) has a duct clearance hole (141) on one of the two side walls (14) near the air inlet box (5). One end of the duct (4) passes through the duct clearance hole (141) and is fixed to the side wall (14) through the duct fixing plate (42). The end of the duct (4) is connected to the air inlet box (5) through the duct connector (52).

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