A submerged roll for hot-dip galvanizing with easy slagging

Abstract

The utility model discloses a submerged roll for hot galvanizing that is easy to discharge slag, which comprises a roll body in the middle, shaft heads on both sides, the shaft heads being connected with the roll body, a plurality of grooves being provided on the outer surface of the roll body, the grooves being uniformly distributed along the axial direction of the roll body, at least one funnel-shaped slag discharge hole being provided on each groove, and the center line of the slag discharge hole coinciding with the center line of the groove. The utility model can promptly discharge the zinc slag in the groove, prevent the zinc slag from gathering in the groove, thereby not only ensuring the friction between the roll cylinder and the strip steel, but also avoiding the scratch defect of the strip steel, ensuring the smooth operation of the production line and the surface quality of the strip steel product.

Description

Technical Field

[0001] This utility model relates to the structure of a submerged roller for hot-dip galvanizing. Background Technology

[0002] The submerged roller system is a key piece of equipment in the zinc pot system of a hot-dip galvanizing production line. During operation, the strip steel is conveyed by the friction between itself and the submerged roller, which causes the submerged roller to rotate passively and continuously. To ensure the friction between the strip steel and the submerged roller body, grooves are usually designed on the submerged roller body to guide the flow of molten zinc.

[0003] During the hot-dip galvanizing process, a large amount of fine zinc dross will appear in the zinc pot. The zinc dross will flow along the grooves to avoid depositing on the roller surface and causing scratches on the strip steel surface, which would seriously affect the quality of the strip steel. However, due to the large amount of zinc dross, it is easy for the zinc dross to accumulate in the grooves and gradually fill them, resulting in abnormal roller rotation and scratches on the strip steel. Summary of the Invention

[0004] The problem to be solved by this utility model is to provide a submerged roller for hot-dip galvanizing that is easy to discharge slag. It can discharge zinc slag in the groove in a timely manner and prevent zinc slag from accumulating in the groove. This not only ensures the friction between the roller and the strip steel, but also avoids scratches on the strip steel, ensuring the smooth operation of the production line and the surface quality of the strip steel products.

[0005] This utility model discloses a submerged roller for hot-dip galvanizing that facilitates slag removal. It includes a central roller body and two side shafts connected to the roller body. Multiple grooves are provided on the outer surface of the roller body, and the grooves are evenly distributed along the axial direction of the roller body. Each groove has at least one funnel-shaped slag discharge hole, and the center line of the slag discharge hole coincides with the center line of the groove.

[0006] Furthermore, the funnel-shaped slag discharge hole is larger on the outside and smaller on the inside, with the diameter of the large opening of the funnel D1 = 2 * the diameter of the small opening of the funnel head D2, and the angle between the inclined hole and the straight hole end face is 45°.

[0007] Furthermore, the slag discharge holes of adjacent trenches are 45° out of phase.

[0008] Furthermore, each groove preferably has two symmetrical slag discharge holes.

[0009] Furthermore, the spacing L1 between adjacent trenches is 25mm, and the outer diameter D1 of the slag discharge hole is 12.5mm.

[0010] Furthermore, the roller body is a sleeve-shaped cylinder with threaded stop holes at both ends. The left and right shaft ends are connected to the roller body by threads. Multiple slag discharge holes are provided on the connection surfaces of the two shaft ends and the roller body.

[0011] Furthermore, the roller body is a centrifugally cast sleeve, and the shaft head is forged stainless steel.

[0012] The advantages of this hot-dip galvanizing submerged roller are as follows: First, during the operation of the hot-dip galvanizing submerged roller, zinc dross in the grooves enters the interior of the roller body through the funnel-shaped dross discharge hole, preventing zinc dross from accumulating in the grooves. This ensures both the friction between the roller and the strip steel and avoids scratches on the strip steel, guaranteeing smooth production line operation and surface quality of the strip steel products. Second, the diameter of the funnel-shaped dross discharge hole is larger on the outside and smaller on the inside, facilitating the rapid entry of zinc dross into the funnel opening. Then, as the submerged roller rotates, it enters the interior of the roller body through the straight hole, preventing accumulation in the grooves. Third, the dross discharge holes of adjacent grooves are 45° out of phase, ensuring that dross discharge holes are available at different angles. This guarantees that zinc dross can enter the discharge holes at any time during the rotation of the submerged roller, preventing accumulation in the grooves. In summary, this invention can promptly discharge zinc dross from the grooves, preventing its accumulation, avoiding scratches on the strip steel, and ensuring smooth production line operation and surface quality of the strip steel products. Attached Figure Description

[0013] Figure 1 This is a front view of the hot-dip galvanizing submerged roller of this utility model.

[0014] Figure 2 yes Figure 1 Side view.

[0015] Figure 3 This is a schematic diagram of a funnel-shaped slag discharge hole. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] from Figure 1 , Figure 3 As can be seen, the present invention provides a hot-dip galvanizing submerged roller for easy slag removal, which includes a roller body 1 in the middle and two shaft heads 2 on both sides. The shaft heads 2 are connected to the roller body 1. Multiple grooves 11 are provided on the outer surface of the roller body 1. The grooves are evenly distributed along the axial direction of the roller body. Each groove 11 has at least one funnel-shaped slag discharge hole 12. The center line of the slag discharge hole 12 coincides with the center line of the groove.

[0019] During the operation of the submerged roller for hot-dip galvanizing, the zinc slag in the groove enters the interior of the roller through the funnel-shaped slag discharge hole, preventing the zinc slag from accumulating in the groove. This ensures the friction between the roller and the strip steel, avoids scratches on the strip steel, and guarantees the operation of the production line and the surface quality of the products.

[0020] Example 2

[0021] from Figure 1 , Figure 3It can be seen that the hot-dip galvanizing submerged roller of this utility model has a funnel-shaped slag discharge hole 12 that is larger on the outside and smaller on the inside. The diameter of the large opening of the funnel, D1, is equal to 2 * the diameter of the small opening of the funnel, D2, and the angle between the inclined hole and the end face of the straight hole is 45°.

[0022] The funnel-shaped slag discharge hole has a larger diameter on the outside and a smaller diameter on the inside, which facilitates the rapid entry of zinc slag into the funnel opening. Then, as the submerged roller rotates, it enters the inside of the roller body through the straight hole, preventing it from accumulating in the groove.

[0023] Example 3

[0024] from Figure 1 , Figure 3 It can be seen that the phase difference of the slag discharge holes 12 of the adjacent grooves in the hot-dip galvanizing submerged roller of this utility model is 45°.

[0025] The phase difference of the slag discharge holes of adjacent trenches is 45°, so that there are slag discharge holes at different angles. This ensures that zinc slag can enter the slag discharge holes at any time during the rotation of the submerged roller, and will not accumulate in the trench.

[0026] Example 4

[0027] from Figure 1 , Figure 3 It can be seen that the hot-dip galvanizing submerged roller of this utility model has two symmetrical slag discharge holes 12 on each groove 11.

[0028] Because of the large amount of zinc dross, the more dross discharge holes there are, the better to ensure that the zinc dross will not accumulate in the trench.

[0029] Example 5

[0030] from Figure 1 , Figure 3 It can be seen that the submerged roller for hot-dip galvanizing of this utility model has the following characteristics: the distance L1 between adjacent grooves 11 is 25mm, and the outer diameter D1 of the slag discharge hole 12 is 12.5mm.

[0031] Since the grooves guide the flow of zinc liquid, the gap between adjacent grooves should not be too large, preferably 25 mm. At the same time, since the slag discharge hole is used for slag discharge, the outer diameter of the slag discharge hole should not be too small, preferably 12.5 mm.

[0032] Example 6

[0033] from Figure 2 As can be seen, the hot-dip galvanizing submerged roller of this utility model has the following characteristics: the roller body 1 is a sleeve-shaped cylinder with threaded stop holes at both ends, and the left and right shaft heads 2 are connected to the roller body 1 by threads; multiple slag discharge holes 21 are provided on the connection surfaces of the two shaft heads 2 and the roller body 1.

[0034] The submerged roller needs to be taken out and cleaned every month. At this time, the zinc slag inside the roller is removed through the slag discharge hole 21 to prevent it from accumulating inside the roller.

[0035] Example 7

[0036] This utility model relates to a submerged roller for hot-dip galvanizing: the roller body is a centrifugally cast sleeve, and the shaft head is forged stainless steel.

[0037] The advantages of this hot-dip galvanizing submerged roller are: 1. During the operation of the hot-dip galvanizing submerged roller, the zinc slag in the groove enters the interior of the roller body through the funnel-shaped slag discharge hole, preventing the zinc slag from accumulating in the groove. This ensures the friction between the roller and the strip steel, avoids scratches on the strip steel, and guarantees the smooth operation of the production line and the surface quality of the product. 2. The diameter of the funnel-shaped slag discharge hole is larger on the outside and smaller on the inside, which facilitates the rapid entry of zinc slag into the funnel opening. Then, as the submerged roller rotates, it enters the interior of the roller body through the straight hole, preventing it from accumulating in the groove. 3. The phase difference of the slag discharge holes in adjacent grooves is 45°, ensuring that there are slag discharge holes at different angles. This guarantees that the zinc slag can enter the slag discharge hole at any time during the rotation of the submerged roller, preventing it from accumulating in the groove.

Claims

1. A submerged roller for hot-dip galvanizing that facilitates slag removal, comprising a central roller body (1) and two side shafts (2), the shafts (2) being connected to the roller body (1), characterized in that: Multiple grooves (11) are provided on the outer surface of the roller body (1), and the grooves are evenly distributed along the axial direction of the roller body; each groove (11) has at least one funnel-shaped slag discharge hole (12), and the center line of the slag discharge hole (12) coincides with the center line of the groove.

2. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: The funnel-shaped slag discharge hole (12) is larger on the outside and smaller on the inside. The diameter of the large opening of the funnel, D1, is 2 * the diameter of the small opening of the funnel head, D2, and the angle between the inclined hole and the end face of the straight hole is 45°.

3. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: The phase difference between the slag discharge holes (12) of adjacent trenches is 45°.

4. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: Each groove (11) preferably has two symmetrical slag discharge holes (12).

5. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: The spacing L1 between adjacent trenches (11) is 25 mm, and the outer diameter D1 of the slag discharge hole (12) is 12.5 mm.

6. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: The roller body (1) is a sleeve-shaped cylinder with threaded stop holes at both ends. The left and right shaft heads (2) are connected to the roller body (1) by threads. Multiple slag discharge holes (21) are provided on the connection surfaces of the two shaft heads (2) and the roller body (1).

7. The submerged roller for hot-dip galvanizing according to claim 1, characterized in that: The roller body (1) is a centrifugally cast sleeve, and the shaft head (2) is forged stainless steel.

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