Reheating furnace for bearing steel pipe high-temperature continuous rolling production line

Abstract

The utility model relates to a reheating furnace for a high-temperature continuous rolling production line of a bearing steel pipe, which comprises a linear furnace body, a hearth arranged in the furnace body along the full length, a furnace door arranged at the front end and the rear end of the furnace body respectively, a plurality of burners arranged in the hearth along the length direction, and a conveying mechanism arranged in the hearth, the axis of the roller shaft is perpendicular to the length direction of the furnace body, two ends of the roller shaft extend out of the furnace body and are provided with transmission wheels, a driving mechanism is arranged outside the furnace body and is connected with the transmission wheels, and a V-shaped supporting wheel is arranged on the part, located in the hearth, of the roller shaft and is used for conveying a steel pipe; the heating temperature uniformity of the steel pipe is good; cost is low, structure is simple, transmission is stable, and failure rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous rolling production of bearing steel pipes, in particular to a reheating furnace used in a high-temperature continuous rolling production line of bearing steel pipes. Background Art

[0002] The bearing steel tube continuous rolling technology is a recently developed technology that has not yet been promoted in the industry. Currently, the technology is only in the hands of one bearing steel tube enterprise. The reheating furnace is a key equipment in the bearing steel continuous rolling production line. The main performance and advantages of the reheating furnace are mainly reflected in the stable transmission of pipes, low energy consumption, low equipment cost, uniform temperature after heating, and guaranteed output.

[0003] Before the breakthrough in the continuous rolling production technology of bearing steel, the more mature continuous rolling process in the industry was the continuous rolling process of carbon steel. The commonly used reheating equipment in the carbon steel continuous rolling process is mostly walking beam heating furnaces or medium frequency heating furnaces. However, these two types of furnaces have many disadvantages. For example, the walking beam furnace is expensive and requires a deep pit foundation to be dug during construction. The cost of the stepping machinery is also high. At the same time, the failure rate of the furnace is high, which is not conducive to continuous production. The medium frequency heating furnace has the characteristics of fast heating speed, but its disadvantages are also obvious, mainly manifested in high energy consumption and uneven temperature of the entire pipe. Summary of the invention

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a reheating furnace for a high-temperature continuous rolling production line of bearing steel pipes.

[0005] The specific scheme of the utility model is: a reheating furnace for a high-temperature continuous rolling production line for bearing steel pipes, comprising a linear furnace body, a furnace chamber is arranged along the entire length of the furnace body, a furnace door is respectively arranged at the front end and the rear end of the furnace body, a plurality of burners are arranged in the furnace chamber along the length direction, a conveying mechanism is arranged in the furnace chamber, the conveying mechanism comprises a plurality of rollers, the axes of the rollers are perpendicular to the length direction of the furnace body, both ends of the rollers extend out of the furnace body and are provided with transmission wheels, a driving mechanism is arranged outside the furnace body, the driving mechanism is connected to the transmission wheel, a V-shaped supporting wheel is arranged on the part of the rollers located in the furnace chamber, and the V-shaped supporting wheel is used to convey the steel pipes.

[0006] Furthermore, the V-shaped supporting wheels are distributed on the left and right sides of the furnace, the V-shaped supporting wheels on the left are installed on the odd-numbered rollers, and the V-shaped supporting wheels on the right are installed on the even-numbered rollers; driving mechanisms are provided on both sides of the furnace body, the driving mechanism on the left is connected to the odd-numbered rollers, and the driving mechanism on the right is connected to the even-numbered rollers.

[0007] Furthermore, the driving mechanism includes a motor and a reducer, the input end of the reducer is connected to the motor, and the output end of the reducer is equipped with a sprocket, which is connected to the transmission wheel of the corresponding roller shaft through a chain.

[0008] Furthermore, the driving mechanism is provided with a plurality of groups along the conveying direction, and the transmission speed of the driving mechanism located at the front end and the rear end is faster than that of the driving mechanism located in the middle.

[0009] Furthermore, the burner is installed on the top of the furnace and the flame-spraying end is arranged vertically downward.

[0010] Furthermore, the inner wall of the furnace body is provided with multiple layers of temperature-resistant material.

[0011] The utility model has the following beneficial effects: good temperature uniformity of steel pipe heating, low cost, simple structure, stable transmission and low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the structure of the utility model;

[0013] Figure 2 yes Figure 1 AA view;

[0014] Figure 3 yes Figure 1 BB view;

[0015] In the figure: 1. furnace; 2. burner; 3. V-shaped support wheel; 4. furnace door; 5. roller; 6. chain; 7. drive mechanism A; 8. drive mechanism B. DETAILED DESCRIPTION

[0016] See also Figure 1-3 The present embodiment provides a reheating furnace for a high-temperature continuous rolling production line for bearing steel pipes, comprising a linear furnace body, a furnace chamber 1 is arranged along the entire length of the furnace body, a furnace door 4 is respectively arranged at the front end and the rear end of the furnace body, a plurality of burners 2 are arranged in the furnace chamber 1 along the length direction, a conveying mechanism is arranged in the furnace chamber 1, the conveying mechanism comprises a plurality of rollers 5, the axes of the rollers 5 are perpendicular to the length direction of the furnace body, both ends of the rollers 5 extend out of the furnace body and are provided with transmission wheels, a driving mechanism is arranged outside the furnace body, the driving mechanism is connected to the transmission wheel, a V-shaped supporting wheel 3 is arranged on the part of the rollers 5 located in the furnace chamber 1, and the V-shaped supporting wheel 3 is used to convey the steel pipe.

[0017] Furthermore, the V-shaped supporting wheels 3 are distributed on the left and right sides of the furnace 1, the V-shaped supporting wheels 3 on the left are installed on the odd-numbered rollers 5, and the V-shaped supporting wheels 3 on the right are installed on the even-numbered rollers 5; driving mechanisms are provided on both sides of the furnace body, the driving mechanism on the left is connected to the odd-numbered rollers 5 by transmission, and the driving mechanism on the right is connected to the even-numbered rollers 5 by transmission; the V-shaped supporting wheels 3 are provided on the left and right sides to form two rows of transmission channels, so that the heating furnace can heat two steel pipes at the same time, thereby increasing the output; the left and right sides of the roller are controlled separately, and the steel pipes on both sides of the roller have no influence on each other. Furthermore, the driving mechanism includes a motor and a reducer, the input end of the reducer is connected to the motor, and the output end of the reducer is equipped with a sprocket, and the sprocket is connected to the transmission wheel of the corresponding roller 5 through a chain 6.

[0018] Furthermore, the driving mechanism is provided with multiple groups along the conveying direction, and the transmission speed of the driving mechanism A7 located at the front and rear ends is faster than that of the driving mechanism B8 located in the middle, so that the heating process in the furnace is slow, thereby improving the heating uniformity, and the steel pipes are allowed to enter and exit quickly at both ends, so that the furnace door 4 can shorten the opening time, reduce heat loss, and reduce energy consumption.

[0019] Furthermore, the burner 2 is installed on the top of the furnace 1 and the flame spraying end is arranged vertically downward, so that heat is emitted from the top from top to bottom, and the temperature in the furnace 1 is more uniform.

[0020] Furthermore, the inner wall of the furnace body is provided with multiple layers of temperature-resistant material.

Claims

1. A reheating furnace for a high temperature continuous rolling production line for bearing steel pipes, characterized by: It includes a linear furnace body, a furnace chamber is arranged along the entire length of the furnace body, a furnace door is respectively arranged at the front end and the rear end of the furnace body, a plurality of burners are arranged in the furnace chamber along the length direction, a conveying mechanism is arranged in the furnace chamber, the conveying mechanism includes a plurality of rollers, the axes of the rollers are perpendicular to the length direction of the furnace body, both ends of the rollers extend out of the furnace body and are equipped with transmission wheels, a driving mechanism is arranged outside the furnace body, the driving mechanism is connected with the transmission wheel, a V-shaped supporting wheel is arranged on the part of the rollers located in the furnace chamber, and the V-shaped supporting wheel is used to convey steel pipes.

2. The reheating furnace for a high temperature continuous rolling production line for bearing steel pipes according to claim 1 is characterized in that: The V-shaped supporting wheels are distributed on the left and right sides of the furnace, the V-shaped supporting wheels on the left are installed on the odd-numbered rollers, and the V-shaped supporting wheels on the right are installed on the even-numbered rollers; driving mechanisms are provided on both sides of the furnace body, the driving mechanism on the left is connected to the odd-numbered rollers, and the driving mechanism on the right is connected to the even-numbered rollers.

3. The reheating furnace for a high temperature continuous rolling production line for bearing steel pipes according to claim 2 is characterized in that: The driving mechanism comprises a motor and a reducer, wherein the input end of the reducer is connected to the motor, and the output end of the reducer is provided with a sprocket, which is connected to a driving wheel of a corresponding roller shaft through a chain.

4. The reheating furnace for a high temperature continuous rolling production line for bearing steel pipes according to claim 3 is characterized in that: The driving mechanisms are provided in multiple groups along the conveying direction, and the transmission speed of the driving mechanisms located at the front and rear ends is faster than that of the driving mechanisms located in the middle.

5. The reheating furnace for a high temperature continuous rolling production line of bearing steel pipe according to claim 1, characterized in that: The burner is installed on the top of the furnace and the flame spraying end is arranged vertically downward.

6. The reheating furnace for a high temperature continuous rolling production line of bearing steel pipe according to claim 1, characterized in that: The inner wall of the furnace body is provided with multiple layers of temperature-resistant materials.

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