A stainless steel coil continuous bright annealing line anti-scuffing material supporting device

Abstract

A stainless steel coil continuous bright annealing line anti-scratch material supporting device, including connecting flange, bearing seat, connecting flange is provided with through hole, for the through of stainless steel coil, bearing seat is fixedly arranged on the outside of connecting flange symmetrically, and the bearing seat is provided with the material supporting shaft that is rotatably arranged between two bearing seats through bearing, and the material supporting shaft crosses the through hole of connecting flange, the cooling cavity is arranged in the bearing seat, the circulating flow cooling medium is arranged in the cooling cavity, the circulating flow cooling medium cools the bearing arranged therein, improves the bearing working temperature, and then ceramic bearing can be replaced by ordinary ball bearing or double-row self-aligning ball bearing, the bearing cost is greatly reduced, and the service life of bearing is greatly prolonged, in addition, the improvement of bearing working temperature can lubricate the bearing well, and the appearance scratch problem of stainless steel pipe caused by the sudden damage of ceramic bearing during the production of the previous bright annealing line is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of stainless steel coil annealing production equipment, specifically to a scratch-resistant material support device for a continuous bright annealing line for stainless steel coils. Background Technology

[0002] In existing continuous bright annealing lines for stainless steel coils, there are insulation and cooling sections that can be tens of meters long. Due to the excessive length of these sections, the stainless steel tubes tend to bend and sag, causing friction against the walls of the insulation or cooling sections and resulting in abrasions on the outer surface of the tubes. To solve this problem, the insulation or cooling sections are typically divided into several shorter segments. A support device is then installed between adjacent segments. This device uses a rotating support shaft to lift the stainless steel tubes, thus preventing abrasions caused by bending and sagging in the insulation and cooling sections.

[0003] However, in the insulation section of the continuous bright annealing line for stainless steel coils, the temperature inside the muffle tubes can reach thousands of degrees Celsius. This puts the bearings of the rotating support shafts in the material support devices installed between adjacent tube sections in a very harsh working environment. Even if expensive, high-temperature resistant ceramic bearings are used, their service life is very short, only a few hundred to a few thousand hours. Frequent replacement of ceramic bearings is not only costly but also affects the production efficiency of the continuous bright annealing line for stainless steel coils. In particular, during the bright annealing process, ceramic bearings may suddenly fail, causing the support shaft to jam and rub against the stainless steel tube, resulting in scratches on the tube wall and causing problems for the production company. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model discloses a scratch-resistant material support device for a continuous bright annealing line for stainless steel coils. By setting a circulating cooling medium in the bearing seat of the material support device, the bearing is cooled, the bearing working environment is improved, and the problems of short bearing service life, high cost, frequent replacement, and scratches on the appearance of stainless steel tubes caused by sudden damage to ceramic bearings during the production of bright annealing line are solved.

[0005] To achieve the aforementioned utility model objective, the present utility model adopts the following technical solution: a scratch-resistant material support device for a continuous bright annealing line for stainless steel coils, used for connecting muffle tubes in a continuous bright annealing line for stainless steel coils; comprising a connecting flange and bearing seats, the connecting flange having a through hole; the bearing seats are symmetrically fixedly arranged on the outside of the connecting flange, and a material support shaft is rotatably arranged between the two bearing seats through a bearing, the material support shaft passing through the through hole of the connecting flange.

[0006] Furthermore, the bearing housing is provided with a cooling chamber, and the cooling chamber is provided with a circulating cooling medium.

[0007] Furthermore, the cooling chamber and the bearing are completely isolated.

[0008] Furthermore, the bearing housing and the connecting flange are fixedly connected by a connecting pipe.

[0009] Preferably, a heat insulation layer is provided between the bearing housing and the connecting flange.

[0010] Furthermore, the bearing is a double-row self-aligning ball bearing.

[0011] Preferably, the bearing is a single-row ball bearing.

[0012] Furthermore, the connecting flange is provided with an air inlet and / or a visual inspection port.

[0013] Due to the adoption of the above-described technical solution, this utility model has the following beneficial effects: The stainless steel coil continuous bright annealing line anti-scratch material support device disclosed in this utility model includes a connecting flange and bearing seats. The connecting flange has a through hole for the passage of the stainless steel coil. The bearing seats are symmetrically fixed on the outside of the connecting flange, and a material support shaft is rotatably arranged between the two bearing seats via a bearing. The material support shaft passes through the through hole of the connecting flange. The bearing seats have a cooling chamber containing a circulating cooling medium. The circulating cooling medium cools the bearings within the cooling chamber, improving the bearing operating temperature. This allows the use of ordinary ball bearings or double-row self-aligning ball bearings instead of ceramic bearings, significantly reducing bearing costs and greatly extending bearing life. Furthermore, the improved bearing operating temperature provides better lubrication and solves the problem of surface scratches on stainless steel tubes caused by sudden damage to ceramic bearings during previous bright annealing line production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the material support device in Embodiment 1; Figure 2 This is a schematic cross-sectional view of the material support device in Embodiment 1; Figure 3 This is a partial enlarged schematic diagram (A) of the cross-sectional structure of the material support device in Embodiment 1; Figure 4 This is a cross-sectional structural diagram of the material support device in Embodiment 2.

[0015] In the diagram: 1. Connecting flange; 1.1. Air inlet; 1.2. Visual inspection hole; 2. Bearing housing; 2.1. Bearing housing body; 2.1.1. Cooling chamber; 2.1.2. Bearing mounting chamber; 2.2. Bearing; 2.3. Bearing end cap; 3. Connecting pipe; 3.1. Sealing end; 3.2. Sealing end cap; 4. Material support shaft; 5. Cooling medium connector; 6. Cooling chamber sealing cover; 7. Insulation layer. Detailed Implementation

[0016] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0017] Example 1, see appendix to the instruction manual. Figure 1 A scratch-resistant material support device for a continuous bright annealing line for stainless steel coils, used for connecting annealed muffle tubes in the line; the device includes a connecting flange 1, a bearing seat 2, a connecting pipe 3, and a material support shaft 4; the connecting flange 1 is a rectangular thick plate with a through hole in the middle and through holes for the material support shaft on both sides; see the attached instruction manual. Figure 3 The bearing housing 2 includes a bearing housing body 2.1. A cooling chamber 2.1.1 is provided on one side of the bearing housing body 2.1, and a bearing mounting chamber 2.1.2 is provided on the other side. The cooling chamber 2.1.1 and the bearing mounting chamber 2.1.2 are connected through a stepped hole. A bearing 2.2 is installed in the bearing mounting chamber 2.1.2. In this embodiment, the bearing 2.2 is a double-row self-aligning ball bearing. A bearing end cap 2.3 is fixedly installed on the outside of the bearing 2.2. The connecting pipe 3 is a long stepped pipe. A sealing end 3.1 is provided at the end adjacent to the bearing 2.2, and a sealing end cap 3.2 is provided on the side adjacent to the sealing end 3.1. When the connecting pipe 3 is installed with the bearing housing body 2.1, the sealing end 3.1 is located in the cooling chamber 2.1. A sealing ring is provided between the sealing end 3.1 and the stepped hole between the bearing housing body 2.1 and the bearing mounting cavity 2.1.2, and the sealing end cap 3.2 is located outside the cooling cavity 2.1.1 of the bearing housing body 2.1. The sealing end cap 3.2 is fixedly connected by welding or bolts, making the cooling cavity 2.1.1 a sealed cavity. Simultaneously, the cooling cavity 2.1.1 and the bearing mounting cavity 2.1.2 are completely isolated, preventing the cooling medium in the cooling cavity 2.1.1 from entering the bearing mounting cavity 2.1.2. Cooling medium connectors 5 are fixedly provided on both sides of the outer side of the bearing housing body 2.1 for circulating cooling medium into the cooling cavity 2.1.1. The cooling medium is either cooling oil or cooling water. (See the attached instruction manual.) Figure 2 The connecting pipe 3, located away from the bearing 2.2, is positioned in the through holes of the material support shaft on both sides of the connecting flange 1. It is fixedly connected by welding or threading, ensuring that the bearing seat 2 is symmetrically fixed on the outside of the connecting flange 1. The two ends of the material support shaft 4 are positioned in the inner sleeve holes of the bearing 2.2, with a small clearance fit between the material support shaft 4 and the inner sleeve holes of the bearing 2.2. The connecting flange 1 also has an air inlet 1.1 and a visual observation hole 1.2 on its side. The air inlet 1.1 is used to connect the gas supply pipe joint, injecting a nitrogen-hydrogen mixture into the central through hole of the connecting flange 1 to protect the stainless steel pipe from oxidation in a high-temperature environment. The visual observation hole 1.2 is used to install a visual observation window, allowing direct observation of the rotation status of the stainless steel pipe and the material support shaft 4 within the material support device.

[0018] When using the anti-scratch material support device for the continuous bright annealing line of stainless steel coils, adjacent annealing muffle tubes are fixedly connected to both ends of the connecting flange 1. The stainless steel tube to be annealed is slowly moved in the high-temperature environment of the annealing muffle tube for annealing. The material support shaft 4 in the material support device supports the stainless steel tube to prevent it from sinking and bending. The material support shaft 4 rotates with the movement of the stainless steel tube to avoid relative movement between the stainless steel tube and the material support shaft 4, which could cause scratches. In the cooling chamber 2.1.1 of the bearing seat 2, circulating cooling medium is introduced through the cooling medium connector 5 to cool the high temperature transmitted from the connecting flange 1 through the connecting pipe 3 and the material support shaft 4, preventing the high temperature from being transferred to the bearing 2.2, thereby ensuring that the bearing 2.2 operates at a suitable temperature and avoiding damage to the bearing 2.2 due to excessive temperature. The connecting pipe 3 adopts a relatively long tubular structure to prevent excessive heat transfer from the connecting flange 1 to the bearing housing 2. With the longer connecting pipe 3, the length of the material support shaft 4 is also correspondingly longer. Especially when bearing the weight of the stainless steel pipe, the material support shaft 4 will bend and deform. To prevent this bending deformation from affecting the smooth rotation of the bearing 2.2, a double-row self-aligning ball bearing is used in bearing 2.2. Furthermore, during the operation of the material support device, the material support shaft 4, located in the middle through hole of the connecting flange 1, will still be affected by high temperature, causing its length to increase. To prevent this increased length from affecting the smooth rotation of bearing 2.2, the material support shaft 4 and the inner sleeve hole of bearing 2.2 are fitted with a small clearance to automatically adapt to the length changes of the material support shaft 4 during operation.

[0019] Example 2, see appendix to the instruction manual. Figure 4 In this embodiment, the structure of the connecting pipe 3 is modified, and the tubular structure connecting the original connecting pipe 3 to the connecting flange 1 is removed. Only the sealing end 3.1 and the sealing end cap 3.2 are retained, making the original connecting pipe 3 a cooling chamber sealing cap 6. A heat insulation layer 7 is set between the bearing seat 2 and the connecting flange 1 to reduce the heat transfer from the connecting flange 1 to the bearing seat 2. This embodiment shortens the length of the material support shaft 4, which can improve the bending deformation problem of the material support shaft 4 during operation. Therefore, the bearing 2.2 can be a single-row ball bearing, reducing the overall cost of the anti-scratch material support device for the continuous bright annealing line of stainless steel coils.

[0020] The parts of this utility model not described in detail are existing technologies.

Claims

1. A scratch-resistant material support device for a continuous bright annealing line for stainless steel coils, used for connecting adjacent muffle tubes in a continuous bright annealing line for stainless steel coils; characterized in that: It includes a connecting flange and bearing housings. The connecting flange has a through hole. The bearing housings are symmetrically fixed on the outside of the connecting flange. A material support shaft is rotatably installed between the two bearing housings through the bearings. The material support shaft passes through the through hole of the connecting flange.

2. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 1, characterized in that: The bearing housing is equipped with a cooling chamber containing a circulating cooling medium.

3. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 2, characterized in that: The cooling chamber is completely isolated from the bearing.

4. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 2, characterized in that: The bearing housing and the connecting flange are fixedly connected by a connecting pipe.

5. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 2, characterized in that: A heat insulation layer is provided between the bearing housing and the connecting flange.

6. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 4, characterized in that: The bearing is a double-row self-aligning ball bearing.

7. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 5, characterized in that: The bearing is a single-row ball bearing.

8. The anti-scratch material support device for a continuous bright annealing line of stainless steel coils according to claim 1, characterized in that: The connecting flange is provided with an air inlet and / or a visual inspection port.

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