Hoisting-free sink roll preheating furnace top cover device

Abstract

The utility model discloses a lifting-free sink roll preheating furnace top cover device which comprises two first supports and a pneumatic system, the top of each first support is provided with a first support, each first support is provided with a second shaft, each second shaft is connected with a tail single-lug air cylinder, and each tail single-lug air cylinder is provided with a tail single-lug air cylinder. The height and the width of an operation area for hoisting a sink roll system around an original sink roll preheating furnace are measured, the size of each part of the novel hoisting-free top cover device is determined by combining the space position of peripheral equipment and facilities of the area, and the bottom sinking form of the top cover of the sink roll preheating furnace is improved. An original movable integral hoisting type is changed into a semi-fixed pneumatic driving split type, when the top cover is opened and closed, the top cover does not generate large change in the vertical height direction, and only moves towards the two sides of the horizontal direction of the box body along a fixed track under the driving of a pneumatic device along a moving track; the top cover moving rail adopts an inclined surface to realize lifting of the cover during moving, and no gap is ensured after closing.

Description

Technical Field

[0001] This utility model relates to the field of hot-dip galvanizing technology for cold-rolled steel strip, and in particular to a top cover device for a submerged roller preheating furnace that does not require hoisting. Background Technology

[0002] After assembly, the submerged rollers of the galvanizing unit need to be preheated in a dedicated preheating furnace before being hoisted into the zinc pot. Generally, to ensure that the submerged rollers do not warp or deform due to the high temperature of the zinc liquid after immersion, or that the bearings crack, the preheating temperature of the submerged rollers should be kept as consistent as possible with the temperature of the zinc liquid before being hoisted into the zinc pot. This avoids the aforementioned problems caused by excessive temperature differences. Generally, galvanizing units specify that the preheating temperature of the submerged rollers for GI products should be between 450-470℃ (the zinc liquid temperature for GI products is around 460℃), and the preheating temperature of the submerged rollers for GL products should be between 590-610℃ (the zinc liquid temperature for GL products is around 590℃).

[0003] Due to the three-roller, six-arm configuration of the submerged roller system, the design of submerged roller preheating furnaces generally requires consideration of how to easily place the assembled submerged roller system (roller frame + roller body) into the preheating furnace. Therefore, the commonly used design for preheating furnaces is a fixed box body with a movable top cover. The lower half of the box body (containing the heating components) is a fixed, open design, allowing the submerged roller system to be easily lifted into the preheating furnace using a crane. The upper part uses a movable, integral top cover (excluding the heating components). After the submerged roller system is placed into the preheating furnace, the movable top cover is then lifted onto the preheating furnace box using a crane and secured with a special lifting device. While this method ensures a large and flexible working space when lifting the submerged roller system, it also has the following drawbacks and adverse effects:

[0004] 1. Work efficiency is significantly affected. During the preheating process of the submerged roll, the first and last steps—lifting the top cover off the preheating furnace and then lifting it back onto the furnace—add two lifting steps. Furthermore, the lifting tools for the top cover and the submerged roll are not interchangeable due to differences in structure and lifting ring position, requiring two additional tool changes. These additional steps add approximately one hour to each operation, impacting work efficiency.

[0005] 2. When the top cover is lifted off the ground and transported to the submerged roller system, a special area needs to be arranged for temporary placement, which affects the space inside the factory.

[0006] 3. Because the top cover is designed to be movable and hoisted, it is impossible to arrange heating components on the top cover, resulting in uneven temperature distribution in the upper and lower parts of the preheating furnace, and the heat loss at the top cover is relatively large, which affects the preheating effect of the submerged roller.

[0007] 4. Frequent hoisting processes, especially when the top cover is hoisted from the preheating furnace after the submerged roller has finished preheating, can easily cause deformation of the top cover structure, resulting in a large gap between the top cover and the box body during subsequent heating, which affects the heat preservation effect.

[0008] 5. There are significant safety risks, such as lifting injuries, during the hoisting process.

[0009] ①: The existing patent CN201720749938.2, "A Submerged Roller Preheating and Insulation Device", describes a method comprising: being installed in a heating furnace containing a submerged roller and a stabilizing roller; characterized in that: it includes several sets of combustion devices... the ignition and flame detection device, the fan and flow regulating valve, and the thermocouple are respectively electrically connected to the combustion controller;

[0010] The aforementioned patent only describes the specific heating methods and detection and control aspects used in the preheating and heat preservation process of the submerged roller, and does not contain any content on the sealing of the submerged roller preheating furnace or other related aspects, nor does it provide a solution for issues such as the hoisting of the top cover during the preheating of the submerged roller. Therefore, it cannot solve the problems of work efficiency and uneven temperature at the top cover.

[0011] ②: The existing publicly disclosed patent CN201420845291.X, "A Heating and Insulation Device for Aluminized Zinc Submerged Rollers," is characterized by: This utility model relates to a heating and insulation device for galvanized zinc submerged rollers, including a heating furnace, resistance band, thermocouple, and control system... The beneficial effects are: 1) It adopts PID regulation, with continuous output from the thyristor power regulator, resulting in high control precision and good furnace temperature uniformity; 2) It can control the temperature according to a set heating curve, and automatically adjust the heating power by controlling the output of the thyristor power regulator; 3) It has automatic power-off protection function and automatic alarm function when the control system is overheated, overcurrent, or three-phase load unbalanced, ensuring the safety and reliability of the system when it is energized;

[0012] The aforementioned patent only describes the specific heating methods and detection and control aspects used in the preheating and heat preservation process of the submerged roller, and does not contain any content on the structure and form of the submerged roller preheating furnace box, etc. It cannot solve the problems of top cover hoisting during submerged roller preheating, and therefore cannot solve the problems of work efficiency and uneven temperature at the top cover.

[0013] ③: The existing publicly disclosed patent CN202220420146.1, "A quick sealing device for the gaps in the preheating furnace of a galvanizing unit submerged roller," is characterized by being composed of multiple sealing components, which improve the convenience of sealing and reduce the loss of spare parts and product quality due to insufficient preheating temperature.

[0014] The aforementioned patent only describes the device and method for sealing the gaps in the submerged roller preheating furnace, but does not cover the overall structure of the submerged roller preheating furnace box or the opening form. Therefore, it cannot solve the problems of roller system and top cover hoisting during submerged roller preheating, and thus cannot solve the problems of work efficiency and uneven temperature at the top cover.

[0015] Therefore, in order to improve the efficiency of the submerged roll preheating process of the galvanizing unit, reduce the space occupied in the work area, reduce the number of high-safety-risk operations such as lifting operations, reduce the probability of deformation of the submerged roll preheating furnace top cover, and at the same time realize the heating function of the preheating furnace top cover to improve the overall temperature distribution uniformity and heat preservation effect, the top cover design of the submerged roll preheating furnace of the galvanizing unit has been systematically optimized, forming this utility model patent. This realizes an innovative upgrade of the submerged roll preheating furnace top cover system, improving work efficiency while reducing work safety risks. Utility Model Content

[0016] The main purpose of this utility model is to provide a non-lifting submerged roller preheating furnace top cover device, which can effectively solve the problems in the background art.

[0017] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0018] A lifting-free submerged roller preheating furnace top cover device includes a support frame and a pneumatic system. There are two supports. Each support frame has a base 1 at its top and a shaft 2 on each base 1. Each shaft 2 is connected to a tail single-ear cylinder. The end of each tail single-ear cylinder away from the support frame 1 is connected to a single-ear connector. The end of each single-ear connector away from the tail single-ear cylinder is connected to a shaft 1. Each shaft 1 is connected to a base 2. Each support frame 1 has a base 2 at its bottom. Channel steel 1 and channel steel 2 are respectively arranged below each support frame 2.

[0019] Preferably, a washer and a cotter pin are provided between the single-ear connector and the shaft.

[0020] Preferably, a bolt, a washer, a spring washer, a third washer, and a cotter pin are respectively provided between the bracket and the support.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Measure the height and width of the working area of ​​the existing submerged roller preheating furnace surrounding the submerged roller hoisting system, and determine the dimensions of each component of the new hoist-free top cover device based on the spatial location of the surrounding equipment and facilities.

[0023] 2. The design of the submerged roller preheating furnace top cover has been improved by changing it from the original movable integral hoisting type to a semi-fixed pneumatically driven split type.

[0024] 3. When opening and closing the top cover, the top cover does not change significantly in the vertical direction. Instead, it moves along the transfer track to both sides of the box in the horizontal direction under the drive of the pneumatic device.

[0025] 4. The top cover moving track uses an inclined plane to allow the cover to rise and fall during movement, ensuring a seamless closing.

[0026] 5. Four to six sets of heating components are arranged on the inner wall side and top surface of the top cover system. The heating components and the power supply device can be connected by cable, and the outside of the cable can be protected by a tank chain. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a lifting-free submerged roller preheating furnace top cover device according to the present invention;

[0028] Figure 2 This is a top view schematic diagram of the top cover device of a submerged roller preheating furnace that does not require hoisting according to this utility model;

[0029] Figure 3 This is a schematic diagram of the pneumatic system of the top cover device of the submerged roller preheating furnace that does not require hoisting according to this utility model.

[0030] In the diagram: 1. Bracket 1; 2. Support 1; 3. Bracket 2; 4. Tail-end single-ear cylinder; 5. Single-ear connector; 6. Support 2; 7. Shaft 1; 8. Channel steel 1; 9. Shaft 2; 10. Channel steel 2; 11. Bolt; 12. Washer 1; 13. Spring washer; 14. Washer 2; 15. Cotter pin 1; 16. Washer 3; 17. Cotter pin 2; 18. Pneumatic system. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0032] like Figure 1-3 As shown, a top cover device for a non-lifting submerged roller preheating furnace includes a support frame 1 and a pneumatic system 18. There are two supports 1. Each support 1 has a support 2 at its top. Each support 2 has a shaft 9. Each shaft 9 is connected to a tail single-ear cylinder 4. Each tail single-ear cylinder 4 is connected to a single-ear connector 5 at the end away from the support 2. Each single-ear connector 5 is connected to a shaft 7 at the end away from the tail single-ear cylinder 4. Each shaft 7 is connected to a support 6. Each support 1 has a support 3 at its bottom. Each support 3 has a channel steel 8 and a channel steel 10 below it.

[0033] Specifically, a washer 14 and a cotter pin 15 are provided between the single-ear connector 5 and the shaft 7.

[0034] Specifically, bolt 11, washer 12, spring washer 13, washer 3 16 and cotter pin 2 17 are respectively provided between bracket 1 and support 2.

[0035] Working principle: The height and width of the working area of ​​the original submerged roller preheating furnace hoisting submerged roller system are measured. Combined with the spatial location of the surrounding equipment and facilities, the dimensions of each component of the new hoist-free top cover device are determined. The submerged roller preheating furnace top cover is improved by sinking it to the original movable integral hoisting type and changed to a semi-fixed pneumatically driven split type. When opening and closing the top cover, the top cover does not undergo a large change in vertical height. It only moves along the transfer track along a fixed trajectory to both sides of the box in the horizontal direction under the drive of the pneumatic device. The top cover transfer track uses an inclined plane to realize the lifting and lowering of the cover during movement, ensuring a seamless gap after closing. 4-6 sets of heating components are arranged on the inner wall side and top surface of the top cover system. The heating components and the power supply device can be connected by cable. The outside of the cable can be protected by a tank chain.

[0036] The circuits, electronic components, and control modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A top cover device for a non-lifting submerged roller preheating furnace, comprising a support frame (1) and a pneumatic system (18), characterized in that: There are two brackets (1). Each bracket (1) has a support (2) on its top. Each support (2) has a shaft (9) on its shaft (9). Each shaft (9) is connected to a tail single-ear cylinder (4). Each tail single-ear cylinder (4) is connected to a single-ear connector (5) at the end away from the support (2). Each single-ear connector (5) is connected to a shaft (7) at the end away from the tail single-ear cylinder (4). Each shaft (7) is connected to a support (6). Each bracket (1) has a bracket (3) at its bottom. Each bracket (3) has a channel steel (8) and a channel steel (10) below it.

2. The top cover device for a non-lifting submerged roller preheating furnace according to claim 1, characterized in that: Washer 2 (14) and cotter pin 1 (15) are provided between the single-ear connector (5) and shaft 1 (7).

3. The top cover device for a non-lifting submerged roller preheating furnace according to claim 1, characterized in that: Bolt (11), washer (12), spring washer (13), washer (3) and cotter pin (2) are respectively provided between the bracket (1) and the support (2).

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