A flying steel preventing device for hot rolling production of fine steel bars

Abstract

A kind of anti-flying steel device for hot rolling production fine steel bar, it relates to steel rolling equipment technical field, including the track being arranged in the rolling line both sides and being arranged along the track length direction several anti-flying steel units, anti-flying steel unit includes two pedestals and the fender being fixed on the two pedestals, two pedestals are arranged on two tracks respectively;Fender includes the planar portion being arranged in the rolling line both sides and being fixedly connected with the top of pedestal and the arc portion being arranged above the rolling line;Track is opened with the length direction consistent strip hole, the through hole being provided on pedestal, and strip hole and through hole are located at the same height, and the pin is passed through through hole and strip hole, so that pedestal can be displaced along the length direction of strip hole;The device is designed by strip hole+pin, when being impacted by flying steel, can produce transverse movement, effectively buffer and absorb the huge kinetic energy of flying steel by friction and displacement, avoid the rigid collision of flying steel and protective device.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling equipment technology, specifically to a device for preventing steel from flying away during hot rolling of fine steel bars. Background Technology

[0002] In the production of high-speed hot-rolled wire rod, the rolling speed of the finishing mill is very high, with the rolling speed of thin steel bars reaching hundreds of meters per second and the temperature approaching 1,000 degrees Celsius. Abnormal speed matching of the finishing mill, workpiece splitting, guide device failure, excessive rolling temperature fluctuations, and malfunctions in the rolls and transmission system can all cause thin steel bars to fly off, resulting in a steel flying accident that poses a serious threat to surrounding personnel and equipment.

[0003] Currently, the existing protective measures against flying steel involve setting up fences around the rolling mill to confine the wire within a certain range. There are two main types: the first is to set up retaining walls on both sides of the rolling mill, which can constrain the wire to some extent, but can only protect against horizontal splashes; the second is to set up guard plates on both sides and above the rolling mill, which can constrain the wire in both the horizontal and vertical directions, but also has some drawbacks: the guard plates set on both sides of the rolling mill are often rigidly connected, which cannot effectively absorb the huge impact kinetic energy of high-speed flying steel, and the protective device is easily penetrated or blown away. In addition, the fixed structure is difficult to adapt to the high-temperature environment, and thermal stress can easily cause the protective device to deform and fail. Utility Model Content

[0004] This utility model provides a device for preventing flying steel in the hot-rolled production of fine steel bars. The device can effectively buffer the impact kinetic energy of flying steel, adapt to thermal deformation, and facilitate subsequent maintenance and replacement.

[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a device for preventing steel flying during hot rolling of fine steel bars, comprising rails arranged on both sides of the rolling line and a plurality of anti-steel flying units arranged along the length of the rails. Each anti-steel flying unit includes two bases and a guard plate fixed on the two bases. The two bases are respectively arranged on two rails. The guard plate includes a flat part arranged on both sides of the rolling line and fixedly connected to the top of the base and an arc-shaped part arranged above the rolling line. The rails are provided with strip-shaped holes in the same direction as their length, and the bases are provided with through holes. The strip-shaped holes and the through holes are located at the same height. A stir pin passes through the through holes and the strip-shaped holes, so that the bases can be displaced along the length of the strip-shaped holes.

[0006] As an optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the arc-shaped part is formed by splicing two oppositely arranged arc-shaped plates, and the splice has a first expansion joint.

[0007] As an alternative optimization of the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: arc-shaped connecting plates are provided at both ends of the first expansion joint, and the arc-shaped connecting plates are connected to the sides of the two arc-shaped plates.

[0008] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: a protrusion is provided on one side of the base and a groove is provided on the other side. The depth of the groove is greater than the length of the protrusion. The protrusion on the base and the groove on the adjacent base are joined together to form a second expansion joint.

[0009] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the base has a groove on one side that extends outward to form a boss, and two adjacent anti-flying steel units are spliced ​​together to form a third expansion joint.

[0010] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the side of the guard plate of the first anti-flying steel unit located on the exit side of the finishing mill is provided with a connecting plate. One side of the connecting plate is fixedly connected to the guard plate, and the other side is fixedly connected to the finishing mill. The cross-section of the connecting plate is the same as the cross-section of the guard plate.

[0011] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the width of the strip hole is greater than the diameter of the mixing pin.

[0012] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the end of the mixing pin is provided with a limiting structure to prevent it from coming out of the strip hole and the through hole.

[0013] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the limiting structure is a positioning pin, and the end of the positioning pin is provided with a through hole that cooperates with the positioning pin.

[0014] As another optimized solution for the above-mentioned anti-flying steel device for hot-rolled production of fine steel bars: the limiting structure is a nut, and the end of the mixing pin is provided with an external thread that mates with the nut.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The device, through its design of strip-shaped holes and agitator pins, can move laterally when impacted by flying steel. Through friction and displacement, it effectively buffers and absorbs the huge kinetic energy of the flying steel, avoiding rigid collisions between the flying steel and the protective device. It also avoids secondary damage caused by the protective device being knocked away, thus improving the impact resistance and service life of the protective device.

[0017] 2. The first expansion joint formed between the protective plates, and the second and third expansion joints formed between the anti-flying steel units, provide an effective stress release space for the entire device to expand due to heat, preventing the structure from being squeezed and deformed or damaged due to thermal stress, and ensuring the reliability of long-term operation under high temperature conditions. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a side view of the structure of this utility model; Figure 5 This is a schematic diagram of the limiting structure of this utility model; Figure 6 This is a schematic diagram of another limiting structure of the present invention; Figure 7 This is a top view of the first anti-flying steel unit of this utility model; Figure 8 This is a side view of the first anti-flying steel unit of this utility model.

[0019] Reference numerals: 1. Track; 101. Strip hole; 2. Base; 201. Through hole; 202. Protrusion; 203. Groove; 204. Boss; 3. Guard plate; 301. Flat part; 302. Arc-shaped part; 3021. Arc-shaped plate; 4. Mixing pin; 401. Positioning pin; 402. Nut; 5. First expansion joint; 6. Arc-shaped connecting plate; 7. Second expansion joint; 8. Third expansion joint; 9. Finishing mill; 10. Connecting plate. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0021] Example 1

[0022] like Figures 1-4As shown, a device for preventing steel from flying off during hot-rolled production of fine reinforcing bars includes rails 1 arranged on both sides of the rolling mill and multiple anti-flying steel units arranged along the length of rails 1. Each anti-flying steel unit includes a base 2 that can slide along the length of rails 1 and a guard plate 3 fixedly connected to the top of the base 2 to provide primary protection. Rails 1 are made of heavy-duty steel rails and are fixedly installed on the foundation on both sides of the rolling mill. The base 2 is made of cast iron or cast steel, and its bottom is machined with grooves that match the cross-section of rails 1, allowing it to sit stably on rails 1. The protective plate 3 is made of wear-resistant and high-temperature resistant alloy steel, including a flat part 301 and an arc-shaped part 302. The flat part 301 is vertically fixed on both sides of the rolling line, and its bottom is welded to the top of the base 2. The arc-shaped part 302 is located in the area above the rolling line, and its two sides are fixedly connected to the top of the flat part 301 that is vertically fixed on both sides of the rolling line. The connection method can be welding or integral molding. The arc-shaped part 302 and the flat part 301 together form an inverted "U" protective plate, forming a tunnel-like protective structure that can effectively wrap and guide the flying steel.

[0023] Multiple strip-shaped holes 101 are formed along the length of the upper part of the track 1. The strip-shaped holes 101 are long rectangular. The number of strip-shaped holes 101 on each track 1 is the same as the number of anti-flying steel units. Through holes 201 are formed on the left and right sides of the groove at the bottom of the base 2. The through holes 201 are coaxially arranged. The strip-shaped holes 101 and the through holes 201 are at the same height. The agitator pin 4 passes laterally from the outside of the track 1 through the through holes 201 and the strip-shaped holes 101 on the outside of the base 2, and finally exits from the through holes 201 on the inside of the base 2. The cross-sectional shape of the agitator pin 4 is the same as the shape of the through holes 201, and can be rectangular or circular. The base 2 forms a sliding dynamic connection with the track 1 through the cooperation of the agitator pin 4 and the strip-shaped holes 101.

[0024] When a steel bar malfunctions, the high-speed steel bar impacts the arc-shaped portion 302 or the flat portion 301 of the guard plate 3. The impact force is transmitted to the base 2 through the guard plate 3, pushing the base 2 to slide along the length of the strip hole 101. During this process, sliding friction occurs between the agitator 4 and the hole wall of the strip hole 101, and sliding friction also occurs between the bottom of the base 2 and the surface of the track 1. Through friction and displacement, the enormous kinetic energy of the steel bar impact is effectively buffered and absorbed, thereby achieving dynamic buffering. This avoids a rigid collision between the protective device and the steel bar, while also confining the direction of the steel bar's trajectory within the guard plate 3, effectively protecting the safety of surrounding personnel and equipment.

[0025] To prevent the mixing pin 4 from getting stuck in the strip hole 101, the width of the strip hole 101 is set to be greater than the diameter of the mixing pin 4, so that there is a certain gap between the mixing pin 4 and the strip hole 101, which allows the base 2 to slide smoothly when a flying steel collision occurs.

[0026] To improve the stability of the anti-flying steel unit, the arc-shaped part 302 is spliced ​​together by two oppositely arranged arc-shaped plates 3021, and the splice has a first expansion joint 5. The first expansion joint 5 is a bending structure with a vertical turn. From the top view, its outline is a trapezoidal bending channel. The first expansion joint 5 provides stress release space for the thermal expansion of the protective plate 3, avoiding deformation caused by thermal stress.

[0027] To enhance the structural stability of the joint, arc-shaped connecting plates 6 are provided at both ends of the first expansion joint 5, i.e., on the left and right sides of the arc-shaped portion 302. The arc-shaped connecting plates 6 are fixedly connected to the sides of the two arc-shaped plates 3021 by welding or bolting. This structural design significantly enhances the integrity and mechanical strength of the top of the protective plate 3 while ensuring thermal expansion clearance, enabling it to better resist impact.

[0028] To improve the flexibility of the entire protective device installation, the bases 2 of two adjacent anti-flying steel units are joined together by a concave-convex structure. Specifically, one side of the base 2 along the direction of track movement is provided with a protrusion 202, and the other side is provided with a groove 203 that cooperates with the protrusion 202 on the adjacent base 1. After the two are joined together, the modular design of the entire device can be realized, which facilitates subsequent maintenance and replacement. At the same time, the depth of the groove 203 is designed to be greater than the length of the protrusion 202. After the two are joined together, a second expansion joint 7 is formed, which provides compensation space for the thermal expansion of the concave-convex structure.

[0029] Furthermore, the base 2 extends outward from one side of the groove 203 to form a boss 204. After the two adjacent anti-flying steel units are spliced ​​together, a third expansion joint 8 is formed. At the same time, the third expansion joint 8 can also be used as an observation joint to observe and judge the rolling condition of the wire rod on the rolling line. The second expansion joint 7 and the third expansion joint 8 together constitute a more complete thermal expansion compensation system, ensuring the dimensional stability and structural safety of the long-distance laying protective device in a high-temperature environment.

[0030] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0031] Example 2

[0032] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 7 , Figure 8As shown, the exit of the finishing mill 9 is a high-risk area for flying steel accidents. The first anti-flying steel unit located here needs to be specially reinforced. Specifically, a connecting plate 10 is installed on the side of the first anti-flying steel unit near the exit of the finishing mill 9. One side of the connecting plate 10 is fixedly connected to the guard plate 3 by welding or bolts, and the other side is fixedly connected to the body of the finishing mill 9 by welding or bolts. The cross-section of the connecting plate 10 is the same as the cross-sectional shape of the guard plate 3 to ensure effective force transmission. This structure can guide the impact force of flying steel to the heavy equipment of the finishing mill 9, realizing the dispersion and release of impact force and enhancing the stability of the first anti-flying steel unit.

[0033] Example 3

[0034] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 5 , Figure 6 As shown, in order to prevent the mixing pin 4 from coming out of the strip hole 101 and through hole 201 during equipment vibration or buffer sliding, a limiting structure is provided at the end of the mixing pin 4. There are multiple ways to implement the limiting structure. This embodiment provides two more common structures: 1. A vertical through hole is machined at the end of the mixing pin 4, and then a positioning pin 401 is inserted to achieve axial positioning; 2. An external thread is machined at the end of the mixing pin 4, and then a nut 402 is screwed on, which can also achieve reliable axial positioning.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for preventing steel from flying during hot rolling production of fine reinforcing bars, characterized in that: It includes rails (1) set on both sides of the rolling line and several anti-flying steel units set along the length of the rails (1). The anti-flying steel unit includes two bases (2) and a guard plate (3) fixed on the two bases (2). The two bases (2) are respectively set on two rails (1). The guard plate (3) includes a flat part (301) set on both sides of the rolling line and fixedly connected to the top of the base (2) and an arc-shaped part (302) set above the rolling line. The rails (1) are provided with strip holes (101) that are consistent with their length direction. The bases (2) are provided with through holes (201). The strip holes (101) and the through holes (201) are located at the same height. The agitator (4) passes through the through holes (201) and the strip holes (101), so that the bases (2) can be displaced along the length direction of the strip holes (101).

2. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 1, characterized in that: The arc-shaped part (302) is formed by splicing two arc-shaped plates (3021) arranged opposite to each other, and the splice has a first expansion joint (5).

3. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 2, characterized in that: The first expansion joint (5) is provided with arc-shaped connecting plates (6) at both ends, and the arc-shaped connecting plates (6) are connected to the sides of the two arc-shaped plates (3021).

4. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 1, characterized in that: One side of the base (2) is provided with a protrusion (202) and the other side is provided with a groove (203). The depth of the groove (203) is greater than the length of the protrusion (202). The protrusion (202) on the base (2) and the groove (203) on the adjacent base (2) are joined together to form a second expansion joint (7).

5. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 4, characterized in that: The base (2) has a groove (203) on one side that extends outward to form a boss (204), and after two adjacent anti-flying steel units are spliced ​​together, a third expansion joint (8) is formed.

6. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 1, characterized in that: A connecting plate (10) is provided on the side of the guard plate (3) of the first anti-flying steel unit located on the exit side of the finishing mill (9). One side of the connecting plate (10) is fixedly connected to the guard plate (3), and the other side is fixedly connected to the finishing mill (9). The cross-section of the connecting plate (10) is the same as the cross-section of the guard plate (3).

7. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 1, characterized in that: The width of the strip hole (101) is greater than the diameter of the mixing pin (4).

8. The anti-flying steel device for hot-rolled production of fine reinforcing bars according to claim 1, characterized in that: The end of the mixing pin (4) is provided with a limiting structure that restricts its disengagement from the strip hole (101) and the through hole (201).

9. A device for preventing steel from flying away during hot-rolled production of fine reinforcing bars according to claim 8, characterized in that: The limiting structure is a positioning pin (401), and the end of the mixing pin (4) is provided with a through hole that cooperates with the positioning pin (401).

10. A device for preventing steel from flying away during hot rolling production of fine reinforcing bars according to claim 8, characterized in that: The limiting structure is a nut (402), and the end of the mixing pin (4) is provided with an external thread that mates with the nut (402).

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