Steel bar cold rolling heat treatment device

Abstract

The utility model discloses a reinforcing steel bar cold rolling heat treatment device in the technical field of reinforcing steel bar machining, and the reinforcing steel bar cold rolling heat treatment device comprises a transmission mechanism used for transporting reinforcing steel bars, cooling mechanisms are arranged on the upper side and the lower side of the transmission mechanism, each cooling mechanism comprises a centrifugal fan, and a nozzle is arranged on each centrifugal fan and is in a strip-shaped horn shape. The length direction of the nozzles is parallel to the central axis of the steel bar, and the two nozzles are oppositely arranged. The device in the scheme can uniformly supply air to quickly cool the reinforcing steel bars.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing technology, and in particular to a steel bar cold rolling heat treatment device. Background Technology

[0002] Cold rolling is a process of rolling steel bars at room temperature to increase their strength and hardness by reducing their cross-sectional dimensions. However, cold-rolled steel bars, because they are not annealed, have extremely high hardness (HRB greater than 90) and very poor machinability. Furthermore, the cold rolling process generates significant internal stresses, which not only affect the ductility and overall performance of the steel bars but may also lead to brittle fracture during use. Therefore, cold-rolled steel bars must undergo heat treatment, especially tempering followed by annealing, to eliminate internal stresses and improve their mechanical properties.

[0003] Annealing after tempering is an essential process for treating cold-rolled steel bars. Tempering reduces internal stress generated during quenching and improves the toughness and plasticity of the steel bars, while annealing further optimizes the microstructure and restores its plasticity and toughness. Through these two steps, the overall performance of the steel bars can be significantly improved, ensuring excellent mechanical properties and reliability in practical applications. Currently, common annealing methods include natural cooling annealing and relatively rapid annealing using equipment. Natural cooling annealing involves placing the cold-rolled steel bars in air to cool naturally. While simple, this method requires a long time and has low efficiency, making it unsuitable for large-scale industrial production. In contrast, rapid annealing using equipment can achieve more efficient stress relief and microstructure optimization by controlling the heating and cooling processes. This equipment typically includes a heating furnace, cooling device, and control system, which can precisely control the annealing temperature, time, and cooling rate, ensuring consistent and reliable annealing results.

[0004] Uneven airflow in the cooling device is a common problem during the cooling and annealing process of steel bars. This can lead to uneven temperature distribution of the steel bars during cooling, which in turn affects their mechanical properties and overall quality. Utility Model Content

[0005] The present invention aims to provide a cold-rolled heat treatment device for reinforcing bars to solve the problem of uneven cooling air supply in existing reinforcing bar cooling devices, which affects the performance of reinforcing bars.

[0006] This solution provides a cold-rolled heat treatment device for reinforcing bars, which includes a transmission mechanism for transporting reinforcing bars. Cooling mechanisms are provided on both the upper and lower sides of the transmission mechanism. Each cooling mechanism includes a centrifugal fan with nozzles on it. The nozzles are strip-shaped and trumpet-shaped, with their length direction parallel to the central axis of the reinforcing bar. The two nozzles are arranged opposite each other.

[0007] The working principle and beneficial effects of this solution are as follows: During use, the reinforcing bar is placed on the transmission mechanism, which then gradually rolls the bar forward. Because the nozzles are strip-shaped and funnel-like, the gas blown from the centrifugal fan passes through the nozzles, which then direct the gas in a strip-like pattern. This strip-shaped gas cools the middle section of the reinforcing bar. The two nozzles above and below also cool the middle section of the reinforcing bar. Simultaneously, the reinforcing bar continues to roll forward, thus cooling the entire bar at once. The strip-shaped nozzles ensure uniform cooling along the entire axial direction of the reinforcing bar. This device can cool the reinforcing bar from both the top and bottom. The gas first cools the section of the reinforcing bar closest to the nozzle, and then the gas from above and below follows the outer edge of the reinforcing bar, cooling the entire circumference. This results in a more uniform cooling distribution.

[0008] Furthermore, the transmission mechanism includes two fixed rods with an "L"-shaped cross-section, arranged symmetrically. Each fixed rod contains a roller assembly for conveying the reinforcing bars. The two ends of the reinforcing bars are placed on the roller assemblies on both sides, and the roller assemblies drive the reinforcing bars forward. This arrangement is superior to a belt, as it allows for simultaneous cooling of the reinforcing bars from both the top and bottom.

[0009] Furthermore, the nozzle's air outlet is elongated rectangular. This design allows for a more uniform distribution of the blown air.

[0010] Furthermore, the inner wall of the nozzle is provided with a flow-guiding groove. This flow-guiding groove allows air to be directed to the perimeter of the long rectangular air outlet, resulting in more even airflow.

[0011] Furthermore, the two centrifugal fans are connected by a fixed bracket. The fixed bracket is used to support the two centrifugal fans.

[0012] Furthermore, the fixing rod is fixedly connected to multiple support rods. The support rods are used to support the fixing rod. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a steel bar cold rolling heat treatment device according to the present invention;

[0014] Figure 2 for Figure 1 The left view;

[0015] Figure 3 This is a top view of the transmission mechanism;

[0016] Figure 4 This is a schematic diagram of the nozzle structure. Detailed Implementation

[0017] The following detailed explanation illustrates the specific implementation methods:

[0018] The reference numerals in the accompanying drawings include: 1. Fixed rod, 2. Support rod, 3. Roller assembly, 4. Reinforcing bar, 5. Centrifugal fan, 6. Nozzle, 7. Fixed bracket, 8. Drainage channel.

[0019] The basic implementation examples are as follows: Figures 1-4 As shown: It includes a transmission mechanism for transporting steel bars. Cooling mechanisms are provided on both the upper and lower sides of the transmission mechanism. The cooling mechanism includes a centrifugal fan 5. Two centrifugal fans 5 are fixedly connected to a fixed bracket 7. The centrifugal fan 5 is provided with a nozzle 6. The air outlet of the nozzle 6 is a long rectangular horn-shaped mouth. The inner wall of the nozzle 6 is provided with a flow channel 8. The length direction of the nozzle 6 is parallel to the central axis of the steel bar 4. The two nozzles 6 are arranged opposite to each other.

[0020] The transmission mechanism includes two fixed rods 1 with an "L" shaped cross section. The two fixed rods 1 are symmetrically arranged. Four support rods 2 are fixedly connected to the fixed rods 1. Each fixed rod 1 is equipped with a roller group 3 for conveying the reinforcing bars 4.

[0021] In use, the two ends of the reinforcing bar 4 are placed on the roller sets 3 on both sides. The roller sets 3 drive the reinforcing bar 4 forward. Since the nozzle 6 is a strip-shaped trumpet, the gas blown from the centrifugal fan 5 passes through the nozzle 6 and the guide channel 8, which guides the air to the periphery of the long rectangular air outlet, making the air outlet more uniform. The nozzle 6 changes the direction of the gas to a strip shape, and the strip-shaped gas is sent out to cool the middle reinforcing bar 4. The two nozzles 6 above and below cool the middle reinforcing bar 4. At the same time, the reinforcing bar 4 is still rolling forward, so the entire reinforcing bar 4 can be cooled together. The strip-shaped air outlet nozzle 6 can uniformly cool the entire axial direction of the reinforcing bar 4. The device in this scheme can spray cooling from the top and bottom of the reinforcing bar 4. The gas first cools the section of the reinforcing bar 4 closest to the nozzle 6, and then the gas from the top and bottom extends along the outer edge of the reinforcing bar 4, so that the circumference of the reinforcing bar 4 is cooled. This cooling distribution is more uniform.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A steel bar cold-rolled heat treatment apparatus, characterized in that: The device includes a transmission mechanism for transporting reinforcing bars. Cooling mechanisms are provided on both the upper and lower sides of the transmission mechanism. Each cooling mechanism includes a centrifugal fan with nozzles on it. The nozzles are strip-shaped and trumpet-shaped, with their length direction parallel to the central axis of the reinforcing bar. The two nozzles are arranged opposite each other.

2. The steel bar cold rolling heat treatment device according to claim 1, characterized in that: The transmission mechanism includes two fixed rods with an "L" shaped cross section. The two fixed rods are arranged symmetrically, and each fixed rod is equipped with a roller assembly for conveying steel bars.

3. The steel bar cold rolling heat treatment device according to claim 2, characterized in that: The nozzle has a long rectangular air outlet.

4. The steel bar cold rolling heat treatment device according to claim 3, characterized in that: The nozzle has a flow channel on its inner wall.

5. The steel bar cold rolling heat treatment apparatus according to claim 4, characterized in that: The two centrifugal fans are connected by a fixed support.

6. The steel bar cold rolling heat treatment apparatus according to claim 5, characterized in that: The fixed rod is fixedly connected to multiple support rods.

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