Steel coil transport line pallet preheating device

Abstract

This invention relates to a pallet preheating device for a steel coil transport line. The device is positioned before the coil loading position on the steel coil transport line and located on one side of the line. The device includes a heating section for preheating an empty pallet on the line and a movable drive structure for moving the heating section closer to or away from the pallet. The heating section is connected to the movable drive structure, and the bottom end of the drive structure is fixed to one side of the transport line. This invention preheats the empty pallet before the steel coil is loaded, ensuring that the temperature of the contact area between the pallet and the coil is close to the coil's temperature. This effectively slows down the heat exchange rate at the contact point, ensuring temperature uniformity during transport and improving product quality.

Description

Technical Field

[0001] This utility model relates to the utilization of steel coil transportation technology, and in particular to a pallet preheating device for a steel coil transportation line. Background Technology

[0002] As a crucial component of hot-rolled production lines, the reliability and speed of transporting finished steel coils directly impact the overall efficiency of the line. Currently, numerous hot strip rolling mills are in operation, producing hot-rolled steel coils characterized by heavy weight, high temperatures, and long transport distances within the production area. Traditional transportation methods such as conveyor chains, walking beams, and truck transport are no longer adequate to meet the high-speed transport requirements of large-scale hot strip rolling production lines. Palletized steel coil transport, a relatively new method, offers advantages such as shorter loading and unloading times, less manual intervention, convenient maintenance, shorter logistics cycles, and easier coil tracking, and is gradually becoming the mainstream method for transporting steel coils in hot strip rolling production lines.

[0003] In recent years, palletized transport has become increasingly popular in metallurgical enterprises, especially in newly built hot rolling mills, for transporting steel coils. Palletized transport was initially used in the non-ferrous metals industry, where surface finish and hardness requirements are high, and was later adopted in hot-rolled steel coil production lines. Steel coils are unloaded from the coiler by a coil trolley and placed on rotating idlers. A coil lifting trolley then removes the coils from the idlers, bundles them, and places them on a pallet on the unloading roller conveyor. A traversing device on the transport line changes the direction of the pallet to different coil storage areas or processing workshops. At the end of the transport line, the pallet carrying the coils stops, and after unloading by a crane or other equipment, the empty pallet continues its journey, passing the traversing roller conveyor and returning to the unloading roller conveyor in front of the coiler to await unloading. In this way, the pallet completes one cycle on the roller conveyor.

[0004] During the hot-rolling process of steel coils, especially in the production of high-temperature coiled steel, the resulting hot-rolled coils are produced at high temperatures. The temperature at the contact point between the coil and the pallet drops by more than 200°C after two hours of transport. Heat exchange occurs at the contact point between the coil and the pallet, causing a rapid temperature decrease, which in turn affects the temperature uniformity of the coil and the product quality, necessitating improvements to the existing technology.

[0005] Therefore, based on years of experience and practice in related industries, the inventor proposes a preheating device for steel coil transport line pallets to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide a preheating device for a steel coil transport line pallet, which solves the problem of rapid temperature drop at the contact point between the steel coil and the pallet, affecting the temperature uniformity of the steel coil and product quality. This invention preheats the empty pallet before the steel coil is wound, ensuring that the temperature of the part of the pallet in contact with the steel coil is close to the temperature of the steel coil in advance. This can effectively slow down the heat exchange rate at the contact point between the steel coil and the pallet, ensure the temperature uniformity of the steel coil during transportation, and improve product quality.

[0007] The purpose of this utility model is achieved as follows: a preheating device for a steel coil transport line pallet, wherein the preheating device is disposed before the coiling position on the steel coil transport line and located on one side of the steel coil transport line; the preheating device includes a heating part for preheating an empty pallet on the steel coil transport line and a movable drive structure for driving the heating part closer to or away from the pallet; the heating part is connected to the movable drive structure; the bottom end of the movable drive structure is fixed to one side of the steel coil transport line.

[0008] In a preferred embodiment of the present invention, the movable drive structure includes a movable swing arm that can swing, the first end of the movable swing arm being hinged to a fixed base, and the second end of the movable swing arm being connected to the heating part; a drive part that can drive the movable swing arm to swing to change the position of the heating part is also connected to the movable swing arm.

[0009] In a preferred embodiment of this utility model, the heating part is a detachable burner, the air inlet of the burner is connected to the gas and combustion-supporting pipes; the nozzle of the burner is matched with the tray; the burner is fixedly connected to the second end of the movable swing arm.

[0010] In a preferred embodiment of this utility model, a protective cover is provided around the outer periphery of the burner nozzle.

[0011] In a preferred embodiment of the present invention, a connecting platform is provided at the second end of the movable swing arm, and the heating part is connected to the side of the connecting platform facing the steel coil transport line.

[0012] In a preferred embodiment of this utility model, the burner nozzle is arranged in a double-nozzle V-shape.

[0013] In a preferred embodiment of this utility model, the driving unit is a driving hydraulic cylinder, which includes a cylinder barrel and a cylinder rod. The first end of the cylinder rod is sealed inside the cylinder barrel, and the second end of the cylinder rod is hinged to the movable swing arm. The end of the cylinder barrel away from the cylinder rod is hinged to the fixed base.

[0014] In a preferred embodiment of the present invention, a first connecting seat is provided on the fixed base, and the first end of the movable swing arm is hinged to the first connecting seat through a first hinge shaft; a second connecting seat is provided on the fixed base, and the cylinder is hinged to the second connecting seat through a second hinge shaft.

[0015] In a preferred embodiment of the present invention, a third connecting seat is provided on the movable swing arm, and the second end of the cylinder rod is hinged to the third connecting seat through a third hinge shaft.

[0016] In a preferred embodiment of this utility model, the heating part is an electric heating device.

[0017] As described above, the steel coil transport line pallet preheating device of this utility model has the following beneficial effects:

[0018] This utility model is installed before the coil loading position on the steel coil transport line and located on one side of the line. It preheats the empty pallet before the steel coil is loaded, without affecting the production rhythm of the rolling line. The heating section preheats the empty pallet before the steel coil is loaded, ensuring that the temperature of the part of the pallet in contact with the steel coil is close to the temperature of the steel coil. This effectively slows down the heat exchange rate at the contact point between the steel coil and the pallet, improves the heat loss problem at the contact point, ensures the temperature uniformity of the steel coil during transportation, and improves product quality. The movable drive structure can change the position of the heating section to ensure that the pallet can pass smoothly under different working conditions. Attached Figure Description

[0019] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0020] Figure 1 This is a front view of the steel coil transport line pallet preheating device of this utility model.

[0021] Figure 2 This is a side view of the steel coil transport line pallet preheating device of this utility model.

[0022] Figure 3 This is a schematic diagram showing the state of the heating part of this utility model when it is in the working position.

[0023] Figure 4 This is a schematic diagram showing the state of the heating part of this utility model when it is in the waiting position.

[0024] In the picture:

[0025] 1. Protective cover;

[0026] 2. Burner tip;

[0027] 3. Movable swing arm; 31. Third connecting seat; 32. Connecting platform;

[0028] 4. Drive the hydraulic cylinder;

[0029] 5. Fixed base; 51. First connecting seat; 52. Second connecting seat;

[0030] 6. Pallet;

[0031] 7. Steel coil transport line;

[0032] 8. Steel coils;

[0033] 9. Gas and gas-supporting pipes. Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0035] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] During the transportation of hot-rolled steel coils, to ensure uniform cooling and prevent excessively rapid local cooling from affecting product quality, the pallets need to be preheated before the coils come into contact with the pallets. Since there is a waiting time before the coils are loaded onto the pallets, a preheating device such as a heat gun or heat gun can be placed next to the coil transport line. Figure 1The image shows a preheating device for the steel coil transport line pallets.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this utility model provides a preheating device for a steel coil transport line pallet. The preheating device is located before the coiling position of the steel coil transport line 7 and on one side of the steel coil transport line 7. The preheating device preheats the pallet 6 before the coil is coiled, thereby increasing the temperature of the pallet 6 and slowing down the heat exchange at the contact point between the steel coil 8 and the pallet 6. The preheating device is located next to (on one side) the steel coil transport line 7 and does not affect the production rhythm of the rolling line.

[0039] The preheating device for the steel coil conveyor includes a heating section and a movable drive structure. The heating section is used to preheat the empty pallet 6 on the steel coil conveyor, especially the contact part between the pallet 6 and the steel coil 8 (estimated). The heating section is connected to the movable drive structure, which can drive the heating section to move closer to or away from the pallet 6. The bottom end of the movable drive structure is fixed to one side of the steel coil conveyor 7.

[0040] This utility model is installed before the coil loading position on the steel coil transport line 7 and located on one side of the steel coil transport line 7. It preheats the empty pallet before the steel coil is loaded, without affecting the production rhythm of the rolling line. The heating part preheats the empty pallet 6 before the steel coil is loaded, ensuring that the temperature of the part of the pallet 6 in contact with the steel coil is close to the temperature of the steel coil. This can effectively slow down the heat exchange rate at the contact point between the steel coil and the pallet, improve the heat loss problem at the contact point, ensure the temperature uniformity of the steel coil during transportation, and improve product quality. The movable drive structure can change the position of the heating part to ensure that the pallet can pass smoothly under different working conditions.

[0041] Furthermore, such as Figure 1 , Figure 2 As shown, the active drive structure includes a swing arm 3 that can swing. The first end of the swing arm 3 is hinged to the fixed base 5, and the second end of the swing arm 3 is connected to the heating part. A drive part that can drive the swing arm 3 to swing to change the position of the heating part is also connected to the swing arm 3.

[0042] The steel coil conveyor pallet preheating device is installed before the coil winding position on the steel coil conveyor line. The entire device is supported by a fixed base 5 connected to the ground foundation, which is structurally stable and adaptable to high-temperature and high-frequency industrial environments.

[0043] Furthermore, such as Figure 1 , Figure 2As shown, the driving unit is a driving hydraulic cylinder 4, which includes a cylinder barrel and a cylinder rod. The first end of the cylinder rod is sealed inside the cylinder barrel, and the second end of the cylinder rod is hinged to the movable swing arm 3. The end of the cylinder barrel away from the cylinder rod is hinged to the fixed base 5.

[0044] As the core of the movable drive structure, the extension and retraction of the hydraulic cylinder 4 controls the movable swing arm 3 to swing within a range of about 90 degrees between vertical and horizontal, ensuring that the pallet 6 can pass smoothly under different working conditions.

[0045] Furthermore, such as Figure 1 , Figure 2 As shown, a first connecting seat 51 is provided on the fixed base 5, and the first end of the movable swing arm 3 is hinged to the first connecting seat 51 through the first hinge shaft; a second connecting seat 52 is provided on the fixed base 5, and the cylinder is hinged to the second connecting seat 52 through the second hinge shaft.

[0046] Furthermore, such as Figure 1 , Figure 2 As shown, a third connecting seat 31 is provided on the movable swing arm 3, and the second end of the cylinder rod is hinged to the third connecting seat 31 through a third hinge shaft.

[0047] Furthermore, such as Figure 1 , Figure 2 As shown, a connecting platform 32 is provided at the second end of the movable swing arm 3, and a heating part is connected to the side of the connecting platform 32 facing the steel coil transport line 7 to achieve a heating direction that matches the tray 6. In a specific embodiment, a perforated H-beam is welded to the second end (end) of the movable swing arm 3 as the connecting platform 32.

[0048] The preheating device for the steel coil conveyor pallet is located next to the steel coil conveyor line 7. It adopts the form of a hydraulic cylinder swing arm. During operation, the heating part is lowered above the pallet of the steel coil conveyor line 7 for heating. After heating is completed, it is opened and removed from the steel coil conveyor line 7 to ensure that the normal logistics passage of the steel coil conveyor line 7 is not affected.

[0049] Furthermore, such as Figure 1 , Figure 2 As shown, the heating element preheats the unloaded tray 6 using flame heating. The heating element is a detachable burner 2, which uses natural gas or coal gas flame heating to ensure fast heating speed and low equipment cost. The burner 2 adopts an integral detachable structure for easy daily maintenance and replacement. The gas inlet of the burner 2 is connected to the gas and auxiliary gas pipes 9 through a flexible metal pipe, and the connection position is equipped with a quick connector and a leak-proof device.

[0050] The nozzle of the burner 2 is matched with the tray; the burner 2 is fixedly connected to the second end of the movable swing arm 3. Specifically, the burner 2 is installed on the connecting platform 32 at the second end of the movable swing arm 3 by bolts.

[0051] To improve heating efficiency and ensure operational safety, a protective cover 1 is provided around the outer periphery of the burner nozzle 2. The protective cover 1 is made of flame-retardant material, and its structure creates a semi-enclosed space in the flame area.

[0052] Furthermore, the shape of the heating element should match the V-shaped mechanism of the tray (existing technology, a structure that directly supports the steel coil) to ensure that the flame can directly heat the area where the steel coil 8 contacts the tray 6. The burner nozzle 2 is arranged in a double-nozzle V-shape. The angle of the nozzle can be designed according to the tray geometry, and the flame directly covers the contact area between the tray 6 and the steel coil 8 from top to bottom, using the radiation and convection heat exchange of the flame to uniformly heat the tray surface.

[0053] By heating with a flame, the temperature of the part of the tray 6 that contacts the steel coil 8 is close to the 720°C of the steel coil, reducing the temperature difference between the two and thus reducing heat exchange.

[0054] Furthermore, in addition to flame heating, the heating element can employ electric heating equipment. In one specific embodiment, an inductive device is used to preheat the tray. The induction heating coil itself does not generate heat during operation, ensuring safety. Furthermore, multiple protection measures are provided, including overcurrent, overtemperature, overvoltage, short circuit, and leakage protection.

[0055] Example 1

[0056] The working process of the steel coil transport line pallet preheating device of this utility model is as follows:

[0057] The heating unit is located in a working position (near pallet 6) and a waiting position (away from pallet 6 and steel coil transport line 7). The active drive structure moves the heating unit between the working position and the waiting position.

[0058] like Figure 4 As shown, when the heating element is in the waiting position, the hydraulic cylinder 4 retracts to make the movable swing arm 3 vertical, ensuring that the pallet with the steel plate can pass through normally. Figure 3 As shown, when the empty pallet 6 that needs to carry the steel coil 8 arrives at the coiling position on the steel coil transport line (preheating station), the hydraulic cylinder 4 is driven to extend and the movable swing arm 3 is rotated down to the horizontal. At this time, the protective cover 1 at the end of the movable swing arm 3 covers the pallet 6, and the burner 2 corresponds to and approaches the contact position between the pallet 6 and the steel coil 8 (working position). The burner 2 sprays flames to preheat the pallet 6.

[0059] like Figure 4 As shown, after preheating is completed, the hydraulic cylinder 4 retracts and drives the movable swing arm 3 to rise to be perpendicular to the ground, so that the pallet 6 can pass through the preheating station regardless of whether it carries steel coils 8.

[0060] As described above, the steel coil transport line pallet preheating device of this utility model has the following beneficial effects:

[0061] This utility model is installed before the coil loading position on the steel coil transport line and located on one side of the line. It preheats the empty pallet before the steel coil is loaded, without affecting the production rhythm of the rolling line. The heating section preheats the empty pallet before the steel coil is loaded, ensuring that the temperature of the part of the pallet in contact with the steel coil is close to the temperature of the steel coil. This effectively slows down the heat exchange rate at the contact point between the steel coil and the pallet, improves the heat loss problem at the contact point, ensures the temperature uniformity of the steel coil during transportation, and improves product quality. The movable drive structure can change the position of the heating section to ensure that the pallet can pass smoothly under different working conditions.

[0062] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A coil handling line tray preheating device, characterized by, The preheating device for the steel coil transport line pallet is located before the coiling position on the steel coil transport line and on one side of the steel coil transport line. The preheating device includes a heating part for preheating an empty pallet on the steel coil transport line and a movable drive structure for driving the heating part closer to or away from the pallet. The heating part is connected to the movable drive structure. The bottom end of the movable drive structure is fixed to one side of the steel coil transport line.

2. The steel coil transport line pallet preheating apparatus of claim 1, wherein, The active drive structure includes a swing arm that can swing, with a first end of the swing arm hinged to a fixed base and a second end of the swing arm connected to the heating part; the swing arm is also connected to a drive part that can drive the swing arm to swing to change the position of the heating part.

3. The steel coil transport line tray preheating apparatus as recited in claim 2, wherein, The heating element is a detachable burner nozzle, the air inlet of which is connected to the gas and combustion-supporting pipes; the nozzle of the burner nozzle is matched with the tray; the burner nozzle is fixedly connected to the second end of the movable swing arm.

4. The steel coil transport line pallet preheating apparatus of claim 3, wherein, The outer periphery of the burner is provided with a protective cover.

5. The steel coil conveyor pallet preheating device as described in claim 3 or 4, characterized in that, The second end of the movable swing arm is provided with a connecting platform, and the heating part is connected to the side of the connecting platform facing the steel coil transport line.

6. The steel coil conveyor pallet preheating device as described in claim 3, characterized in that, The burner nozzle is arranged in a double-nozzle V-shape.

7. The steel coil conveyor pallet preheating device as described in claim 2, characterized in that, The driving unit is a driving hydraulic cylinder, which includes a cylinder barrel and a cylinder rod. The first end of the cylinder rod is sealed inside the cylinder barrel, and the second end of the cylinder rod is hinged to the movable swing arm. The end of the cylinder barrel away from the cylinder rod is hinged to the fixed base.

8. The steel coil conveyor pallet preheating device as described in claim 7, characterized in that, A first connecting seat is provided on the fixed base, and the first end of the movable swing arm is hinged to the first connecting seat through a first hinge shaft; a second connecting seat is provided on the fixed base, and the cylinder is hinged to the second connecting seat through a second hinge shaft.

9. The steel coil conveyor pallet preheating device as described in claim 7, characterized in that, A third connecting seat is provided on the movable swing arm, and the second end of the cylinder rod is hinged to the third connecting seat through a third hinge shaft.

10. The steel coil conveyor pallet preheating device as described in claim 2, characterized in that, The heating element is an electric heating device.

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