A seamless steel pipe hot rolling sizing equipment

Abstract

The utility model relates to the field of seamless steel tube hot rolling sizing technology, especially to a kind of seamless steel tube hot rolling sizing equipment.Seamless steel tube hot rolling sizing equipment includes arc fairlead, and one end of arc fairlead extends to the outside of sizing equipment, and scraper is installed on arc fairlead, and one mounting bracket is installed on the outer wall of both sides of arc fairlead, and adjustable angle's flow guide pipe is installed between two mounting brackets, and multiple water jet heads distributed transversely are fixedly installed on flow guide pipe, and water inlet connector is also fixedly installed on the side of flow guide pipe away from water jet head.In the utility model, impurities are scraped by scraper, and the water flow carrying impurities is discharged along arc fairlead to the outside of machine body, which can efficiently remove impurities, and can inhibit impurities from adhering due to high temperature by water flow cooling, reduce the accumulation of impurities in equipment, reduce the influence of impurities on equipment operation, and ensure the normal operation of sizing equipment.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling and sizing technology for seamless steel pipes, and in particular to a hot rolling and sizing device for seamless steel pipes. Background Technology

[0002] Seamless steel pipe is a rolled steel pipe without weld seams. It is made of hot-rolled steel, or, if necessary, hot-rolled pipe is cold-worked to obtain the necessary shape, size and performance. Hot rolling sizing is a key process in the hot rolling production of seamless steel pipe. It refers to the process of precisely shaping and controlling the outer diameter of the steel pipe after hot rolling to meet the finished product specifications through a sizing machine.

[0003] The hot-rolled seamless steel pipe sizing mill disclosed in CN215467042U features a scraping mechanism installed at the lower end of the rolls inside the mill body. The scraper in this mechanism is in close contact with the bottom of the roll groove, and a return spring inside the top column generates an upward thrust, causing the top column to push the scraper up and down, ensuring the scraper remains in close contact with the roll groove. During the sizing of the steel pipe, the roll groove is constantly scraped by the scraper to remove impurities, preventing impurity particles from scratching the steel pipe inside the roll groove. However, the seamless steel pipe itself reaches a high temperature during sizing, and the scraped impurities also have a high temperature. Over time, these impurities accumulate and adhere together, forming large pieces that are difficult to remove from the mill body and can affect the operation of the equipment.

[0004] Therefore, it is necessary to provide a new hot rolling and sizing equipment for seamless steel pipes to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a new hot rolling and sizing equipment for seamless steel pipes.

[0006] The seamless steel pipe hot rolling sizing equipment provided by this utility model includes: an arc-shaped guide plate installed on the sizing equipment, one end of the arc-shaped guide plate extending to the outside of the sizing equipment, an elastically telescopic scraper installed on the arc-shaped guide plate, and the arc-shaped top end of the scraper adhering to the inner arc wall of the roll on the sizing equipment; a mounting frame is installed on each of the two outer walls of the arc-shaped guide plate, and an adjustable-angle guide pipe is installed between the two mounting frames; multiple horizontally distributed water spray heads are fixedly installed on the guide pipe, and the multiple water spray heads are all connected to the guide pipe and their output ends are set towards the inner arc wall of the roll; a water inlet connector is also fixedly installed on the side of the guide pipe away from the water spray heads, and the water inlet connector is located in the middle of the guide pipe and connected to an external water supply device.

[0007] Preferably, the bottom of the arc-shaped guide plate is equipped with an installation box located directly below the scraper. The arc-shaped guide plate has a sliding opening that communicates with the installation box, and a sliding column connected to the lower end of the scraper is slidably connected in the sliding opening. A limiting ring is fixedly sleeved on the sliding column, and a spring is also sleeved on the sliding column. The upper and lower ends of the spring abut against the limiting ring and the installation box, respectively.

[0008] Preferably, the arc-shaped guide plate has a limiting opening that communicates with the mounting box, and a limiting plate that is fixedly connected to the bottom of the scraper is slidably connected in the limiting opening. A rear baffle is also fixedly installed on the rear side of the scraper.

[0009] Preferably, the rear baffle and the front wall of the arc-shaped guide plate are fitted with a clearance.

[0010] Preferably, ear pieces are fixedly installed on both side walls of the mounting box, and each of the ear pieces has a connection port.

[0011] Preferably, the mounting box is fixedly connected to the arc-shaped guide plate by bolts, and the sliding column is threadedly connected to the scraper.

[0012] Preferably, both ends of the guide tube are fixedly installed with rotating rods, and the two rotating rods pass through two mounting brackets and are rotatably connected to them respectively. One of the mounting brackets is threaded with a limiting screw whose end abuts against the rotating rod, and the end of the rotating rod rotatably connected to the other mounting bracket is fixedly installed with a knob.

[0013] Preferably, both mounting brackets are fixed to the side wall of the arc-shaped guide plate by connecting bolts.

[0014] Compared with related technologies, the seamless steel pipe hot rolling and sizing equipment provided by this utility model has the following beneficial effects:

[0015] In this invention, the scraper removes high-temperature impurities from the surface of the roll, while the water flow quickly carries the impurities to the arc-shaped guide plate and discharges them outside the equipment. This prevents impurities from accumulating inside the equipment, effectively removing impurities and inhibiting their adhesion due to high temperatures through water cooling. This reduces the accumulation of impurities inside the equipment, minimizing their impact on equipment operation and ensuring the normal operation of the sizing equipment. At the same time, continuous water spray cooling lowers the working temperature of the roll, reducing roll wear or cracks caused by thermal fatigue and extending the roll replacement cycle. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the hot rolling and sizing equipment for seamless steel pipes provided by this utility model;

[0017] Figure 2 for Figure 1 The diagram shows the structure of the arc-shaped guide vane.

[0018] Figure 3 for Figure 1 The diagram shows the structure of the scraper.

[0019] Figure 4 for Figure 1 A schematic diagram of the overall structure of the guide tube is shown.

[0020] Figure 5 for Figure 1 The diagram shows the internal structure of one end of the guide tube.

[0021] The following are labeled in the diagram: 1. Arc-shaped guide plate; 11. Sliding port; 12. Limiting opening; 2. Mounting box; 3. Ear plate; 31. Connection port; 4. Scraper; 41. Sliding column; 42. Limiting ring; 43. Spring; 44. Limiting plate; 45. Rear baffle; 5. Mounting bracket; 51. Connecting bolt; 6. Guide pipe; 61. Knob; 62. Rotating rod; 63. Limiting screw; 7. Spray head; 8. Water inlet connector. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] Please see Figures 1 to 5 This utility model provides a seamless steel pipe hot rolling sizing device, which includes an arc-shaped guide plate 1 installed on the sizing device. One end of the arc-shaped guide plate 1 extends to the outside of the sizing device. The arc-shaped guide plate 1 is used to guide the water flow that cools the rolls on the sizing device and guide the cooled water to the outside of the sizing device. The outside of the sizing device here refers to the machine body of the hot rolling seamless steel pipe sizing machine disclosed in CN215467042U.

[0025] In the embodiments of this utility model, please refer to Figures 1 to 5 An elastically telescopic scraper 4 is installed on the arc-shaped guide plate 1, and the arc-shaped top end of the scraper 4 is attached to the inner arc wall of the roller on the sizing equipment. An installation box 2 located directly below the scraper 4 is installed at the bottom of the arc-shaped guide plate 1. A sliding opening 11 communicating with the installation box 2 is opened on the arc-shaped guide plate 1, and a sliding column 41 connected to the lower end of the scraper 4 is slidably connected in the sliding opening 11. A limiting ring 42 is fixedly sleeved on the sliding column 41, and a spring 43 is also sleeved on the sliding column 41. The upper and lower ends of the spring 43 abut against the limiting ring 42 and the installation box 2 respectively.

[0026] It should be noted that: the arc-shaped top of the scraper 4 is attached to the roll in the hot-rolled seamless steel pipe sizing mill provided in CN215467042U to scrape off the impurities adhering to the roll. The sliding column 41 can slide in the sliding opening 11 opened on the arc-shaped guide plate 1. The spring 43 squeezes the limiting ring 42 so that the scraper 4 at the upper end of the sliding column 41 is always in close contact with the roll in the hot-rolled seamless steel pipe sizing mill provided in CN215467042U. The sliding opening 11 plays a certain limiting role for the scraper 4 connected to the sliding column 41, so that the scraper 4 is always vertically upward. The mounting box 2 provides the installation space for the sliding column 41 and raises the arc-shaped guide plate 1 so that the scraper 4 can be in close contact with the roll in the hot-rolled seamless steel pipe sizing mill provided in CN215467042U.

[0027] Preferably, the arc-shaped guide plate 1 has a limiting opening 12 that communicates with the mounting box 2, and a limiting plate 44 that is fixedly connected to the bottom of the scraper 4 is slidably connected in the limiting opening 12. A rear baffle 45 is also fixedly installed on the rear side of the scraper 4. The limiting plate 44 can slide up and down in the limiting opening 12. While ensuring that the scraper 4 can move in the vertical direction, the stability of the scraper 4 is improved. The rear baffle 45 is in clearance fit with the front wall of the arc-shaped guide plate 1. The rear baffle 45 is close to the front wall of the arc-shaped guide plate 1 but does not contact it. After the scraper 4 is slightly deformed, the rear baffle 45 will abut against the front wall of the arc-shaped guide plate 1 to support it and prevent it from being directly damaged. This improves the stability of the scraper 4 and protects it.

[0028] Preferably, ear pieces 3 are fixedly installed on both side walls of the mounting box 2, and each ear piece 3 has a connection port 31. The mounting box 2 is fixed to the machine body of the hot-rolled seamless steel pipe sizing machine provided in CN215467042U through the connection port 31 on the ear piece 3 and with the help of connectors. There is no need to open a cavity inside the machine body to install the scraper 4, which facilitates the installation and replacement of the scraper 4.

[0029] Preferably, the mounting box 2 is fixedly connected to the arc-shaped guide plate 1 by bolts, and the sliding column 41 is threadedly connected to the scraper 4. That is, the mounting box 2 and the arc-shaped guide plate 1 are detachable, and the sliding column 41 is also easy to disassemble, so that the scraper 4 can be replaced after being damaged after long-term use.

[0030] It is worth noting that the water jet from the spray head 7 can also cool the scraper 4 to a certain extent, preventing the scraper 4 from being damaged excessively due to prolonged friction with the roller, and extending the service life of the scraper 4.

[0031] In the embodiments of this utility model, please refer to Figures 1 to 5An installation bracket 5 is installed on each of the two outer walls of the arc-shaped guide plate 1, and an adjustable angle guide pipe 6 is installed between the two installation brackets 5. Multiple horizontally distributed spray heads 7 are fixedly installed on the guide pipe 6. The multiple spray heads 7 are all connected to the guide pipe 6 and their output ends are set towards the inner arc wall of the roll. A water inlet connector 8 is also fixedly installed on the side of the guide pipe 6 away from the spray heads 7. The water inlet connector 8 is located in the middle of the guide pipe 6 and is connected to the external water supply equipment.

[0032] It should be noted that: water is supplied to the inside of the guide pipe 6 through the connection of the external water supply equipment and the water inlet connector 8. The water spray head 7 sprays water to cool the rolls in the hot-rolled seamless steel pipe sizing mill provided in CN215467042U. The cooled water flows into the arc-shaped guide plate 1 and is guided to the outside of the machine body in the hot-rolled seamless steel pipe sizing mill provided in CN215467042U. The impurities scraped off from the rolls by the scraper 4 also fall into the arc-shaped guide plate 1 and are guided to the outside of the machine body with the water flow. In this utility model, the scraper 4 scrapes off the high-temperature impurities on the surface of the rolls, and the water flow quickly carries the impurities to the arc-shaped guide plate 1 and discharges them outside the equipment along the arc-shaped guide plate 1, avoiding the accumulation of impurities in the equipment. It can not only efficiently remove impurities, but also inhibit the adhesion of impurities due to high temperature through water cooling. Continuous water spraying and cooling can reduce the working temperature of the rolls, reduce the wear or cracks of the rolls caused by thermal fatigue, and extend the roll replacement cycle.

[0033] Preferably, both ends of the guide pipe 6 are fixedly installed with rotating rods 62, and the two rotating rods 62 pass through the two mounting brackets 5 respectively and are rotatably connected to them. One mounting bracket 5 is threaded with a limiting screw 63 whose end abuts against the rotating rod 62. The end of the rotating rod 62, which is rotatably connected to the other mounting bracket 5, is fixedly installed with a knob 61. When the limiting screw 63 is loosened, the guide pipe 6 can be adjusted by the knob 61 to adjust the direction of the spray head 7. Tightening the limiting screw 63 can limit the guide pipe 6, which makes it convenient for the staff to adjust the direction of the spray head 7 according to the actual situation.

[0034] Preferably, both mounting brackets 5 are fixed to the side wall of the arc-shaped guide plate 1 by connecting bolts 51; the mounting brackets 5 are detachable, that is, the guide pipe 6 and its related components can be removed, which facilitates the inspection and replacement of damaged components.

[0035] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A seamless steel pipe hot rolling sizing equipment, comprising an arc deflector (1) installed on the sizing equipment, one end of the arc deflector (1) extending to the outside of the sizing equipment, characterized in that: The arc-shaped guide plate (1) is equipped with an elastically telescopic scraper (4), and the arc-shaped top end of the scraper (4) is attached to the inner arc wall of the roll on the sizing equipment. A mounting bracket (5) is installed on both outer walls of the arc-shaped guide plate (1), and an adjustable angle guide pipe (6) is installed between the two mounting brackets (5). Multiple horizontally distributed spray heads (7) are fixedly installed on the guide pipe (6). The multiple spray heads (7) are all connected to the guide pipe (6) and their output ends are set towards the inner arc wall of the roll. A water inlet connector (8) is also fixedly installed on the side of the guide pipe (6) away from the spray head (7), and the water inlet connector (8) is located in the middle of the guide pipe (6) and connected to the external water supply equipment.

2. The seamless pipe hot pilger mill according to claim 1, characterized in that The bottom of the arc-shaped guide plate (1) is equipped with an installation box (2) located directly below the scraper (4). The arc-shaped guide plate (1) has a sliding opening (11) that communicates with the installation box (2). A sliding column (41) connected to the lower end of the scraper (4) is slidably connected in the sliding opening (11). A limiting ring (42) is fixedly sleeved on the sliding column (41). A spring (43) is also sleeved on the sliding column (41). The upper and lower ends of the spring (43) abut against the limiting ring (42) and the installation box (2) respectively.

3. The seamless pipe hot pilger mill according to claim 2, characterized in that The arc-shaped guide plate (1) has a limiting opening (12) that communicates with the mounting box (2), and a limiting plate (44) that is fixedly connected to the bottom of the scraper (4) is slidably connected in the limiting opening (12), and a rear baffle (45) is also fixedly installed on the rear side of the scraper (4).

4. The seamless pipe hot pilger mill of claim 3, wherein, The rear baffle (45) is fitted with the front wall of the arc-shaped guide plate (1) with a clearance.

5. The seamless pipe hot pilger mill of claim 2, wherein, Ear pieces (3) are fixedly installed on both sides of the mounting box (2), and each of the two ear pieces (3) has a connection port (31).

6. The seamless pipe hot pilger mill of claim 2, wherein, The mounting box (2) is fixedly connected to the arc-shaped guide plate (1) by bolts, and the sliding column (41) is threadedly connected to the scraper (4).

7. The seamless pipe hot pilger mill of claim 1, wherein, Both ends of the guide tube (6) are fixedly installed with rotating rods (62), and the two rotating rods (62) pass through the two mounting brackets (5) respectively and are rotatably connected to them. One of the mounting brackets (5) is threadedly connected with a limiting screw (63) whose end abuts against the rotating rod (62). The end of the rotating rod (62) rotatably connected to the other mounting bracket (5) is fixedly installed with a knob (61).

8. The seamless pipe hot pilger mill of claim 1, wherein, Both mounting brackets (5) are fixed to the side wall of the arc-shaped guide plate (1) by connecting bolts (51).

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