Conveying device for a horizontal annealing furnace

Abstract

The utility model relates to steel pipe production equipment technical field provides a conveying device of horizontal annealing furnace, including conveying unit and circulating unit, conveying unit is used for conveying steel pipe, and circulating unit can convey the gas in the furnace body to conveying unit, circulating unit includes fan case, air suction pipe and return air pipe, and fan case connects air suction pipe and return air pipe, and air suction pipe connects the inner top of furnace body, and return air pipe is connected with the conveying unit in the inside of furnace body, and conveying unit can blow the gas that return air pipe sent from below to above to the steel pipe in the furnace body, the utility model drives the circulating flow of the airflow in the furnace body, improves the stability of evenness in the furnace body, improves the precision of temperature control in the furnace body.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe production equipment, and in particular to a conveying device for a horizontal annealing furnace. Background Technology

[0002] During the production of seamless steel pipes, annealing is required. Annealing can eliminate the internal stress generated during the manufacturing process and reduce deformation and cracking during subsequent processing.

[0003] CN221479977U discloses a continuous heating annealing furnace, including a furnace body support frame, an annealing furnace body on the top of the furnace body support frame, a heat dissipation mechanism on the top of the annealing furnace body, a temperature sensor on one side wall of the annealing furnace body, a control panel on one side wall of the annealing furnace body, a discharge port on one side wall of the annealing furnace body, a feed port on the other side wall of the annealing furnace body, two sets of electric push rods inside the annealing furnace body, two sets of limiting baffles inside the annealing furnace body, two sets of limiting inclined plates inside the annealing furnace body near the feed port, and a conveyor belt inside the annealing furnace body.

[0004] In the existing technology, when the temperature inside the annealing furnace is too high, a heat dissipation mechanism is used to discharge the hot air inside the furnace, thereby reducing the temperature inside the furnace. However, when the temperature inside the furnace is actually detected, since the steel pipe is in a conveying state, the temperature at the steel pipe will be slightly lower than that at other locations inside the furnace. When the temperature inside the furnace is detected to be too high, it may be due to the uneven temperature inside the furnace. In this case, discharging the hot air will affect the annealing process of the steel pipe. Utility Model Content

[0005] This utility model provides a conveying device for a horizontal annealing furnace to solve the problems mentioned in the background art.

[0006] In view of this, the present invention aims to provide a conveying device for a horizontal annealing furnace. In the present invention, the conveying device is located inside the furnace body and extends out of the furnace body at both ends for the feeding and discharging of steel pipes. The conveying device includes a conveying unit and a circulation unit. The conveying unit is used to convey steel pipes, and the circulation unit can transport the gas inside the furnace body to the conveying unit.

[0007] The circulation unit includes a fan box, an air intake pipe, and a return air pipe. The fan box is connected to the air intake pipe and the return air pipe. The air intake pipe is connected to the inner top of the furnace body. The return air pipe is connected to the conveying unit inside the furnace body. The conveying unit can blow the gas sent in by the return air pipe from bottom to top onto the steel pipe inside the furnace body.

[0008] By setting up a circulation unit, the gas at the top of the furnace body is transported to the conveying unit at the bottom for discharge, forming a circulation, which improves the gas flow in the furnace body, avoids uneven gas temperature inside the furnace body, improves the uniformity of temperature inside the furnace body, can accurately obtain the temperature inside the furnace body, and can blow the gas directly onto the steel pipe, improving the annealing efficiency of the steel pipe.

[0009] Furthermore, the conveying unit includes a support frame, a conveying roller mounted on the support frame, and a drive component for driving the conveying roller to rotate; the conveying roller is rotatably mounted on the support frame via a rotating shaft, an air cavity is formed inside the rotating shaft, an exhaust groove is formed on the conveying roller, and the exhaust groove communicates with the air cavity of the rotating shaft;

[0010] The furnace body is equipped with a gas supply pipe, which is connected to the return air pipe, and the gas supply pipe is connected to each rotating shaft through branch pipes.

[0011] Blowing gas from the conveyor rollers upwards onto the steel pipe ensures full contact between the gas and the pipe. The upward conveying direction also prevents gas turbulence inside the furnace and improves gas flow.

[0012] Furthermore, the driving component includes a drive motor, a drive gear, a transmission gear, and a pulley; the drive motor is installed outside the furnace body, and the output end of the drive motor passes through the interior of the furnace body and is connected to the drive gear;

[0013] The transmission gear is mounted on the rotating shaft, and the pulleys are mounted on the rotating shaft. The pulleys are connected to each other by a transmission belt.

[0014] The drive motor drives the drive gear to rotate, which in turn drives the transmission gear to rotate, causing all the shafts and conveyor rollers to rotate for conveying.

[0015] Furthermore, the conveying device also includes a preheating mechanism, which includes an exhaust hood and an exhaust pipe, the exhaust pipe connecting the exhaust hood and the blower box; both the return air pipe and the exhaust pipe are equipped with on / off valves; the exhaust hood is located at the feed end of the furnace body and at the upper end of the conveying unit.

[0016] A preheating mechanism is installed to blow the high-temperature gas discharged when the temperature is too high toward the steel pipe to be entered, so as to make full use of the discharged high-temperature gas.

[0017] This utility model discloses a conveying device for a horizontal annealing furnace. By setting up a circulation unit in conjunction with the conveying unit, the gas at the top of the furnace body is conveyed to the conveying unit at the bottom for discharge, forming a circulation. This improves the gas flow within the furnace body, avoids uneven gas temperature inside the furnace body, improves the temperature uniformity inside the furnace body, and enables precise temperature acquisition within the furnace body, facilitating precise temperature adjustment. Furthermore, it can directly blow gas onto the steel pipe, improving the annealing efficiency of the steel pipe. Simultaneously, by setting up a preheating mechanism, the high-temperature gas discharged when the temperature is too high is blown onto the steel pipe to be entered, preheating the steel pipe and making full use of the discharged high-temperature gas.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0021] Figure 2 This is a side view schematic diagram of one embodiment of the present utility model;

[0022] Figure 3 This is a top view of the conveying unit in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the conveyor roller in one embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Furnace body; 2. Blower box; 3. Suction pipe; 4. Return pipe; 5. Conveying unit; 51. Support frame; 52. Conveying roller; 521. Exhaust trough; 53. Rotating shaft; 54. Gas supply pipe; 55. Branch pipe; 56. Transmission gear; 6. Exhaust pipe; 7. Exhaust hood. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices. "Fixed" or "fixed connection" generally refers to common mechanical connection methods, such as threaded connections, welding, or bonding.

[0029] In the existing technology, when the temperature inside the annealing furnace is too high, a heat dissipation mechanism is used to discharge the hot air inside the furnace, thereby reducing the temperature inside the furnace. However, when the temperature inside the furnace is actually detected, since the steel pipe is in a conveying state, the temperature at the steel pipe will be slightly lower than that at other locations inside the furnace. When the temperature inside the furnace is detected to be too high, it may be due to the uneven temperature inside the furnace. In this case, discharging the hot air will affect the annealing process of the steel pipe.

[0030] This utility model provides a conveying device for a horizontal annealing furnace, such as... Figure 1 and Figure 2 As shown, in this embodiment, the conveying device is located inside the furnace body 1 and extends out of the furnace body 1 at both ends. The conveying device is used to send steel pipes into the furnace body 1 for annealing and to send the steel pipes out of the furnace body 1 after annealing. The conveying device includes a conveying unit 5 and a circulation unit. The conveying unit 5 is used to convey steel pipes in and out of the furnace body 1. The circulation unit can convey the gas in the furnace body 1 to the conveying unit 5 and then discharge it into the interior of the furnace body 1 to achieve gas circulation. A temperature sensor is installed inside the furnace body 1 to collect the temperature inside the furnace body, so as to facilitate the adjustment and control of the temperature inside the furnace body 1.

[0031] Regarding the circulation unit, the circulation unit includes a fan box 2, an intake pipe 3, and a return pipe 4. The fan box 2 includes a box body and a fan installed inside the box body. One end of the intake pipe 3 is connected to the fan box 2, and the other end is connected to the inner top of the furnace body 1. One end of the return pipe 4 is connected to the fan box 2, and the other end is connected to the conveying unit 5. It should be noted that the return pipe 4 is only connected to the conveying unit 5 inside the furnace body 1, so that the airflow circulation is only kept inside the furnace body 1. Insulation structures are provided on the outer walls of both the intake pipe 3 and the return pipe 4 to prevent heat loss during airflow circulation. The conveying unit 5 can blow the gas sent in by the return pipe 4 from bottom to top onto the steel pipe inside the furnace body 1.

[0032] This invention, by setting up a circulation unit, transports the gas from the top of the furnace body 1 to the bottom conveying unit 5 for discharge, forming a circulation, improving the gas flow within the furnace body 1, avoiding uneven gas temperatures inside the furnace body 1, improving the temperature uniformity inside the furnace body 1, enabling precise temperature acquisition within the furnace body 1, facilitating precise temperature adjustment within the furnace body 1, and allowing the gas to be directly blown onto the steel pipe, improving the annealing efficiency of the steel pipe.

[0033] Regarding conveying unit 5, such as Figure 3 As shown, the conveying unit 5 includes a support frame 51, conveying rollers 52, and a driving component; the conveying rollers 52 are arranged in multiple evenly on the support frame 51; the driving component drives the conveying rollers 52 to rotate on the support frame 51 to convey the steel pipes; the conveying rollers 52 are rotatably mounted on the support frame 51 via a rotating shaft 53; as shown... Figure 4 As shown, an air chamber is formed inside the rotating shaft 53, and an exhaust groove 521 is formed on the conveying roller 52. The exhaust groove 521 is connected to the air chamber of the rotating shaft 53. The air from the air chamber is discharged from the exhaust hole on the rotating shaft 53 into the exhaust groove 521, and then discharged from the exhaust groove 521 onto the steel pipe on the conveying roller 52. A gas supply pipe 54 is provided inside the furnace body 1. The gas supply pipe 54 is connected to the return air pipe 4. The gas supply pipe 54 is connected to each rotating shaft 53 through a branch pipe 55, so that the gas entering the return air pipe 4 enters the gas supply pipe 53. 4. Then, the gas enters the interior of the rotating shaft 53 through the branch pipe 55 from the gas supply pipe 54; the return gas is set to blow from the bottom to the top of the conveying roller 52 onto the steel pipe, which can make the gas fully contact the steel pipe and improve the annealing efficiency of the steel pipe; and the gas is conveyed from bottom to top, which, together with the suction pipe 3 and the return air pipe 4 conveying from top to bottom, forms a constant flow circulation, which can avoid the gas turbulence inside the furnace body 1, improve the gas flow inside the furnace body 1, and ensure the uniformity of the temperature inside the furnace body 1.

[0034] To stably drive multiple driving components, including a drive motor, a drive gear, a transmission gear 56, and pulleys, the drive motor is installed outside the furnace body 1 to ensure proper heat dissipation. The output end of the drive motor passes into the interior of the furnace body 1 and connects with the drive gear to drive its rotation. The drive gear is installed on a rotating shaft 53 so that the rotating shaft 53 can be controlled by the drive motor to rotate. Each rotating shaft 53 is equipped with a pulley, and the pulleys of adjacent rotating shafts 53 are connected by a transmission belt. This enables the drive motor to drive all rotating shafts 53 and conveying rollers 52 to rotate for conveying steel pipes.

[0035] To fully utilize the exhaust heat and avoid the danger of direct discharge, a preheating mechanism is also installed in the conveying device. This preheating mechanism consists of an exhaust hood 7 and an exhaust pipe 6. The exhaust pipe 6 connects the exhaust hood 7 and the blower box 2, allowing exhaust gas from inside the furnace body 1 to reach the exhaust hood 7. The opening of the exhaust hood 7 faces downwards towards the steel pipe on the conveying roller 52. The exhaust hood 7 is located at the feed end of the furnace body 1 and above the conveying unit 5, allowing the gas discharged from the exhaust hood 7 to be directly blown onto the steel pipe to be fed. (Return air...) Both the exhaust pipe 4 and the exhaust pipe 6 are equipped with on / off valves. When the on / off valve on the exhaust pipe 6 is closed, the on / off valve on the return air pipe 4 is opened, and the gas input from the suction pipe 3 returns to the furnace body 1 through the return air pipe 4 for circulation. When the on / off valve on the exhaust pipe 6 is open, the on / off valve on the return air pipe 4 is closed, and the gas input from the suction pipe 3 enters the exhaust pipe 6 and is discharged from the exhaust hood 7 onto the steel pipe. A preheating mechanism is provided to blow the high-temperature gas discharged when the temperature is too high toward the steel pipe to be entered, so as to make full use of the discharged high-temperature gas.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A conveying device of a horizontal annealing furnace, which is provided in the inside of a furnace body (1) and has both ends passing through the furnace body (1), characterized in that, The conveying device includes a conveying unit (5) and a circulation unit. The conveying unit (5) is used to convey steel pipes, and the circulation unit can convey gas in the furnace body (1) to the conveying unit (5). The circulation unit includes a fan box (2), an air intake pipe (3), and a return air pipe (4). The fan box (2) is connected to the air intake pipe (3) and the return air pipe (4). The air intake pipe (3) is connected to the inner top of the furnace body (1). The return air pipe (4) is connected to the conveying unit (5) inside the furnace body (1). The conveying unit (5) can blow the gas sent in by the return air pipe (4) from bottom to top onto the steel pipe inside the furnace body (1).

2. The conveying device of a horizontal annealing furnace according to claim 1, characterized in that, The conveying unit (5) includes a support frame (51), a conveying roller (52) disposed on the support frame (51), and a driving component for driving the conveying roller (52) to rotate; the conveying roller (52) is rotatably mounted on the support frame (51) via a rotating shaft (53), an air chamber is opened in the rotating shaft (53), and an exhaust groove (521) is opened on the conveying roller (52), the exhaust groove (521) is connected to the air chamber of the rotating shaft (53); The furnace body (1) is provided with a gas supply pipe (54), which is connected to the return air pipe (4). The gas supply pipe (54) is connected to each rotating shaft (53) through a branch pipe (55).

3. The conveying device of a horizontal annealing furnace according to claim 2, characterized in that, The driving component includes a drive motor, a drive gear, a transmission gear (56), and a pulley; the drive motor is installed outside the furnace body (1), and the output end of the drive motor passes through the interior of the furnace body (1) and is connected to the drive gear; The transmission gear (56) is mounted on the rotating shaft (53), and the pulley is mounted on the rotating shaft (53). The pulleys are connected to each other by a transmission belt.

4. The conveying device of a horizontal annealing furnace according to any one of claims 1 to 3, characterized in that, The conveying device also includes a preheating mechanism, which includes an exhaust hood (7) and an exhaust pipe (6). The exhaust pipe (6) connects the exhaust hood (7) and the fan box (2). Both the return air pipe (4) and the exhaust pipe (6) are equipped with opening and closing valves. The exhaust hood (7) is located at the feeding end of the furnace body (1) and at the upper end of the conveying unit (5).

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