Annealing device for steel bar production

Abstract

The utility model discloses an annealing device for reinforcing steel bar production. The annealing device comprises a slow cooling bin, a cooler and a drying bin which are sequentially mounted, the slow cooling bin, the cooler and the drying bin are connected in series through an electric conveying device, and a plurality of conveying rollers are mounted in the slow cooling bin, the cooler and the drying bin; an exhaust hood A is arranged above the inlet side of the slow cooling bin, an air inlet hood A is arranged above the outlet side of the slow cooling bin, an air inlet hood B is arranged on the inlet side of the drying bin, and an exhaust hood B is arranged on the outlet side of the drying bin; a negative pressure pump is mounted at an outlet of the exhaust hood A, and an outlet of the negative pressure pump is connected to an air inlet hood B of the drying bin through an air supply pipe. The continuous annealing device has the advantages that continuous annealing work can be achieved, that is, the continuous annealing device can be directly installed behind a steel bar forming workshop section and cut after annealing is completed, so that repeated transfer is not needed, the workload is reduced, hot air of the slow cooling bin is supplied to the drying bin, energy is saved, and the production cost is reduced. And the section length of the drying bin is reduced.

Description

Technical Field

[0001] The utility model relates to a heat treatment device, in particular to an annealing device used for steel bar production. Background Art

[0002] Annealing is a metal heat treatment process that refers to slowly heating the metal to a certain temperature and then cooling it at an appropriate rate. The purpose is to reduce hardness, improve machinability, eliminate residual stress, stabilize size, reduce deformation and crack tendency; refine grains, adjust structure, and eliminate structural defects.

[0003] Some steel bars with special functions also need to be annealed after production. However, the various sections of current annealing equipment are independent of each other, and the workpiece needs to be transferred between each section. Steel bars are continuous products and can be annealed continuously after production. This can avoid multiple transfers on the one hand, and greatly improve work efficiency and reduce energy consumption and costs on the other. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an annealing device for steel bar production to solve the technical problem in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] An annealing device for steel bar production comprises a slow cooling bin, a cooler and a drying bin which are installed in sequence; the slow cooling bin, the cooler and the drying bin are connected in series via an electric conveying device, and a plurality of conveying rollers are installed inside them; an exhaust hood A is arranged above the inlet side of the slow cooling bin, an air intake hood A is arranged above the outlet side, an air intake hood B is arranged on the inlet side of the drying bin, and an exhaust hood B is arranged on the outlet side; a negative pressure pump is installed at the outlet of the exhaust hood A, and the outlet of the negative pressure pump is connected to the air intake hood B of the drying bin via an air supply pipe.

[0007] Furthermore, the electric conveying device includes a base plate and an axle seat installed on the base plate, a pair of conveying rollers are installed on the axle seat, one end of the rotating shaft of the conveying rollers is installed with gears that transmit each other, the other end of the rotating shaft of one of the conveying rollers is connected to a gearbox, and the gearbox is connected to the motor.

[0008] Furthermore, the cooler includes a cover body and a liquid storage tank connected to the bottom side of the cover body, a spray pipe group is installed on the top of the cover body, a circulation pump is installed on the bottom side of the liquid storage tank, and the circulation pump is connected to the spray pipe group through a circulation pipe.

[0009] Furthermore, the middle of the cover body is provided with a transverse through groove, and the spray pipe groups are distributed on the top of the cover body on both sides of the through groove.

[0010] Furthermore, the circumferential surface of the conveying roller and the conveying wheel has an annular groove with an arc-shaped cross section.

[0011] The advantages of the utility model are:

[0012] The advantage of the utility model is that continuous annealing work can be achieved, that is, it can be directly installed behind the steel bar forming section and cut after annealing is completed, so there is no need for multiple transfers, which reduces the workload, and the hot air in the slow cooling bin is used to provide it to the drying bin, which can save energy and reduce the section length of the drying bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0014] Figure 2 This is a cross-sectional view of the slow cooling chamber;

[0015] Figure 3 It is a schematic diagram of the cooler structure;

[0016] Figure 4 This is a schematic diagram of the structure of the electric conveying device.

[0017] In the figure, 1-slow cooling chamber, 11-air intake hood A, 12-exhaust hood A, 2-cooler, 21-hood body, 211-through groove, 22-liquid storage tank, 23-spray pipe group, 24-circulation pump, 3-drying chamber, 31-air intake hood B, 32-exhaust hood B, 4-electric conveying device, 41-bottom plate, 42-axle seat, 43-conveying roller, 44-gear, 45-gearbox, 46-motor, 5-air supply pipe, 6-conveying roller. DETAILED DESCRIPTION

[0018] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] As shown in the figure:

[0020] An annealing device for steel bar production comprises a slow cooling bin 1, a cooler 2 and a drying bin 3 (the structure of which is consistent with the slow cooling bin 1) which are installed in sequence; the slow cooling bin 1, the cooler 2 and the drying bin 3 are connected in series via an electric conveying device 4, and a plurality of conveying rollers 6 are installed inside them; an exhaust hood A12 is arranged above the inlet side of the slow cooling bin 1, and an air intake hood A11 is arranged above the outlet side; an air intake hood B31 is arranged on the inlet side of the drying bin 3, and an exhaust hood B32 is arranged on the outlet side; a negative pressure pump is installed at the outlet of the exhaust hood A12, and the outlet of the negative pressure pump is connected to the air intake hood B31 of the drying bin 3 via an air supply pipe 5.

[0021] The steel bars that need to be annealed are first heated to the annealing temperature by passing through a cylindrical electric frequency furnace (according to the prior art, when the steel bars pass through the inside, they will be heated by the high-frequency alternating electromagnetic field inside), and then enter the slow cooling bin 1, the cooler 2 and the drying bin 3 in turn. The traction power is provided by the electric conveying device 4, and the conveying rollers 6 in the slow cooling bin 1, the cooler 2 and the drying bin 3 play a role of supporting and reducing friction.

[0022] In the slow cooling bin 1, the temperature of the steel bars will gradually decrease, and the negative pressure pump will generate an airflow from the air inlet hood A11 to the exhaust hood A12 in the slow cooling bin 1. Part of the heat dissipated by the steel bars will be taken away by the internal airflow, and this part of the airflow will be transported to the drying bin 3. The steel bars that have undergone slow cooling enter the cooler 2 (at this time the temperature is still around 200-300 degrees Celsius), where they will be sprayed with coolant to quickly cool down, and then enter the drying bin 3, where the high-temperature air transported by the air supply pipe 5 will be quickly dried (the air temperature can reach 100-200 degrees Celsius).

[0023] The advantage of the utility model is that it can realize continuous annealing work, that is to say, it can be directly installed behind the steel bar forming section, and cut after annealing is completed, so there is no need for multiple transfers, which reduces the workload, and uses the hot air from the slow cooling bin 1 to provide it to the drying bin 3, which can save energy and reduce the section length of the drying bin 3.

[0024] As an optimized solution, the electric conveying device 4 includes a base plate 41 and an axle seat 42 installed on the base plate 41, a pair of conveying rollers 43 are installed on the axle seat 42, one end of the rotating shaft of the conveying roller 43 is installed with a gear 44 that transmits each other, the other end of the rotating shaft of one of the conveying rollers 43 is connected to a gearbox 45, and the gearbox 45 is connected to a motor 46. In order to better fit the contour of the steel bars and provide more effective support and traction, the conveying roller 43 and the conveying roller 6 have an annular groove with an arc-shaped cross-section on their circumferential surfaces.

[0025] As an optimized solution, the cooler 2 includes a cover body 21 and a liquid storage tank 22 connected to the bottom side of the cover body 21, a spray pipe group 23 is installed on the top of the cover body 21, and a circulating pump 24 is installed on the bottom side of the liquid storage tank 22. The circulating pump is connected to the spray pipe group 23 through a circulating pipe. The cover body 21 can prevent the coolant from splashing outward and facilitate the recovery of the coolant. In order to facilitate exhaust, a horizontal through groove 211 and a spray pipe group 23 can be provided in the middle of the cover body 21. The spray pipe group 23 is distributed on the top of the cover body 21 on both sides of the through groove 211.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An annealing device for steel bar production, Features: It includes a slow cooling bin, a cooler and a drying bin which are installed in sequence; the slow cooling bin, the cooler and the drying bin are connected in series through an electric conveying device, and a plurality of conveying rollers are installed inside them; an exhaust hood A is arranged above the inlet side of the slow cooling bin, and an air intake hood A is arranged above the outlet side; an air intake hood B is arranged at the inlet side of the drying bin, and an exhaust hood B is arranged at the outlet side; a negative pressure pump is installed at the outlet of the exhaust hood A, and the outlet of the negative pressure pump is connected to the air intake hood B of the drying bin through an air supply pipe.

2. The annealing device for steel bar production according to claim 1, Features: The electric conveying device includes a base plate and an axle seat installed on the base plate, a pair of conveying rollers are installed on the axle seat, one end of the rotating shaft of the conveying rollers is installed with gears that transmit each other, the other end of the rotating shaft of one of the conveying rollers is connected to a gearbox, and the gearbox is connected to the motor.

3. The annealing device for steel bar production according to claim 2, Features: The cooler includes a cover body and a liquid storage tank connected to the bottom side of the cover body, a spray pipe group is installed on the top of the cover body, a circulation pump is installed on the bottom side of the liquid storage tank, and the circulation pump is connected to the spray pipe group through a circulation pipe.

4. The annealing device for steel bar production according to claim 3, Features: The middle part of the cover body is provided with a transverse through groove and a spray pipe group, and the spray pipe group is distributed on the top of the cover body on both sides of the through groove.

5. The annealing device for steel bar production according to claim 2, Features: The circumferential surfaces of the conveying roller and the conveying wheel are each provided with an annular groove with an arc-shaped cross section.

Images