After-rolling controlled cooling device for hot-rolled steel bars

Abstract

The utility model discloses an after-rolling controlled cooling device for hot-rolled steel bars, which relates to the technical field of hot-rolled steel bar cooling, is arranged between an outlet of a finished rolling mill and a standby shear, and comprises a base, a cooling device and a control device, the controlled cooling pipe is arranged between the supporting frames at the two ends; a pipe inlet and a pipe outlet of the controlled cooling pipe are open and respectively correspond to a roller way of an outlet of a finished rolling mill and a roller way of a standby ruler shear; the cooling control pipe is provided with a nozzle seat, and a spraying part is arranged in the nozzle seat; a water inlet pipe is arranged at the top of the nozzle holder; the cooling control pipes are shorter than the steel bars. The device can quickly and properly cool the hot-rolled reinforcing steel bar, so that the temperature of the reinforcing steel bar is reduced from more than or equal to 1020 DEG C to less than or equal to 1000 DEG C after being cooled by the controlled cooling device, the surface of the reinforcing steel bar is smooth and bubble-free, high-temperature scale bubbles are prevented from being formed on the surface of the reinforcing steel bar, the bubbles are prevented from being fragile, the scale falls off, and the working environment is influenced; and the cooling efficiency and the production quality of the steel bars are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-rolled steel bar cooling, in particular to a hot-rolled steel bar post-rolling controlled cooling device. Background Art

[0002] In the production of hot-rolled steel bars, in order to ensure qualified metallographic structure, control alloy cost and improve surface quality, currently, most hot-rolled steel bars are produced using air cooling process.

[0003] In the related art, the hot-rolled steel bars are usually cooled at the outlet of the finished rolling mill. However, the temperature of the steel bars after air cooling at the outlet of the finished rolling mill will be ≥1020°C, and high-temperature iron oxide bubbles will form on the surface, which are easy to break and fall into the factory or construction site, causing great pollution to the working environment and seriously affecting the appearance and production quality of the steel bars. Utility Model Content

[0004] The purpose of the utility model is to provide a hot-rolled steel bar post-rolling controlled cooling device to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A post-rolling controlled cooling device for hot-rolled steel bars, arranged between the outlet of a finished product rolling mill and a shearing machine, comprises:

[0007] A base, wherein support frames are respectively arranged at two ends of the top of the base;

[0008] A cooling control pipe, which is arranged between the support frames at both ends;

[0009] The pipe inlet and the pipe outlet of the cooling control pipe are both open, corresponding to the roller table at the outlet of the finished product rolling mill and the roller table of the ready-to-length shear respectively;

[0010] The cooling control pipe is provided with a nozzle seat, and a spray component is provided in the nozzle seat;

[0011] A water inlet pipe is arranged on the top of the nozzle seat;

[0012] The length of the cooling control pipe is shorter than the length of the steel bar.

[0013] The hot rolled steel bar post-rolling controlled cooling device according to this scheme has at least the following technical effects:

[0014] By arranging the hot-rolled steel bar post-rolling controlled cooling device between the finished product mill outlet and the length-prepared shear, the hot-rolled steel bar is transported from the finished product mill outlet roller to the controlled cooling pipe, and the spraying component in the controlled cooling pipe sprays the cooling medium onto the steel bar surface to achieve proper cooling of the steel bar surface. Moreover, since the length of the controlled cooling pipe is less than the length of the steel bar, the other end of the steel bar has entered the length-prepared shear roller before the finished product mill outlet roller conveys the entire steel bar, so that the steel bar can easily come out of the controlled cooling pipe and enter the next process after cooling. The device can realize rapid and proper cooling of the hot-rolled steel bar, so that the steel bar temperature is reduced from ≥1020℃ in air cooling at the finished product mill outlet to ≤1000℃ after cooling through the controlled cooling device, so that the steel bar surface is smooth and free of bubbles, and high-temperature iron oxide bubbles are avoided from forming on the steel bar surface, and bubbles are fragile and cause the iron sheet to fall off and affect the working environment, and the cooling efficiency and production quality of the steel bar are improved.

[0015] As a further solution of the utility model: the spray component includes a first nozzle and a second nozzle arranged on one side of the first nozzle, the first nozzle is an outer conical surface, and the second nozzle is an inner conical surface.

[0016] Since the spray component includes a first nozzle and a second nozzle arranged on one side of the first nozzle, the first nozzle is an outer conical surface, and the second nozzle is an inner conical surface, so that an annular gap with a certain taper is formed between the first nozzle and the second nozzle, the spray direction and coverage area of ​​the cooling medium can be accurately controlled, ensuring that the cooling medium is evenly sprayed around the steel bar and ensuring that the surface of the steel bar is evenly cooled.

[0017] As a further solution of the utility model: the cooling control pipe includes a plurality of liner tubes, and adjacent liner tubes are detachably connected.

[0018] Since the controlled cooling pipe includes several liner pipes, adjacent liner pipes are detachably connected, so that the liner pipes can be added or reduced according to the length of the steel bar, ensuring the suitability of steel bars of different lengths and ensuring that the steel bars can be fully and properly cooled in the controlled cooling pipe, thereby improving the flexibility of steel bar production; at the same time, the liner pipe is easy to repair and replace without disassembling the entire liner pipe, reducing the downtime for liner maintenance or replacement, improving production continuity, and thus improving work efficiency.

[0019] As a further solution of the utility model: the inner diameters of the two ends of the plurality of liner pipes are larger than the inner diameter of the middle part thereof.

[0020] Since the inner diameters at both ends of several liner pipes are larger than the inner diameter in the middle, the cooling medium forms turbulence in the liner pipes, which increases the heat transfer rate between the cooling medium and the surface of the steel bar, thereby accelerating the cooling speed of the steel bar, allowing the steel bar to be appropriately cooled to the required temperature in a short time, further improving the cooling efficiency of the steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of a hot-rolled steel bar post-rolling controlled cooling device;

[0023] Figure 2 It is a schematic diagram of the structure of a cooling control pipe of a hot-rolled steel bar post-rolling cooling control device;

[0024] Figure 3 for Figure 2 BB surface cross-sectional view;

[0025] Figure 4 for Figure 3 A partial enlarged view of point A.

[0026] Reference numerals:

[0027] 101. Finished product mill outlet; 102. Prepared shear; 103. Base; 104. Support frame; 105. Cooling control pipe; 106. Nozzle holder; 107. Water inlet pipe; 108. First nozzle; 109. Second nozzle; 110. Liner. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the utility model.

[0034] like Figure 1-4 The embodiment of the utility model shown is a post-rolling controlled cooling device for hot-rolled steel bars, which is arranged between the finished product rolling mill outlet 101 and the preparation shear 102, and includes: a base 103, and support frames 104 are respectively arranged at both ends of the top of the base 103; a controlled cooling pipe 105, and the controlled cooling pipe 105 is arranged between the support frames 104 at both ends; the pipe inlet and the pipe outlet of the controlled cooling pipe 105 are both opened, corresponding to the roller table of the finished product rolling mill outlet 101 and the roller table of the preparation shear 102 respectively; the controlled cooling pipe 105 is provided with a nozzle seat 106, and a spray component is arranged in the nozzle seat 106; a water inlet pipe 107 is arranged on the top of the nozzle seat 106; the length of the controlled cooling pipe 105 is less than the length of the steel bar.

[0035] Specifically, by arranging the hot-rolled steel bar post-rolling controlled cooling device between the finished product mill outlet 101 and the prepared length shear 102, the hot-rolled steel bar is transported from the finished product mill outlet 101 roller to the controlled cooling pipe 105, and the spraying component in the controlled cooling pipe 105 sprays the cooling medium onto the steel bar surface to achieve proper cooling of the steel bar surface, and because the length of the controlled cooling pipe 105 is less than the length of the steel bar, the other end of the steel bar has entered the prepared length shear 102 roller before the finished product mill outlet 101 roller conveys the entire steel bar, so that the steel bar is easy to come out of the controlled cooling pipe 105 and enter the next process after cooling. The device can realize the rapid and proper cooling of the hot-rolled steel bar, so that the steel bar temperature is reduced from ≥1020℃ in air cooling at the finished product mill outlet to ≤1000℃ after cooling through the controlled cooling device, so that the steel bar surface is smooth and free of bubbles, and the formation of high-temperature iron oxide bubbles on the steel bar surface is avoided, and the bubbles are fragile and cause the iron sheet to fall off and affect the working environment, and the cooling efficiency and production quality of the steel bar are improved.

[0036] like Figure 3 and Figure 4 As shown, the spray component includes a first nozzle 108 and a second nozzle 109 arranged on one side of the first nozzle 108. The first nozzle 108 is an outer conical surface, and the second nozzle 109 is an inner conical surface.

[0037] Specifically, since the spray component includes a first nozzle 108 and a second nozzle 109 arranged on one side of the first nozzle 108, the first nozzle 108 is an outer conical surface, and the second nozzle 109 is an inner conical surface, so that an annular gap with a certain taper is formed between the first nozzle 108 and the second nozzle 109, the spray direction and coverage area of ​​the cooling medium can be accurately controlled, ensuring that the cooling medium is evenly sprayed around the steel bars, ensuring that the surface of the steel bars is evenly cooled.

[0038] like Figure 3 As shown, the cooling control tube 105 includes a plurality of liner tubes 110, and adjacent liner tubes 110 are detachably connected.

[0039] Specifically, since the cooling control pipe 105 includes a plurality of liner tubes 110, adjacent liner tubes 110 are detachably connected, so that the liner tubes 110 can be added or reduced according to the length of the steel bars, ensuring the applicability of steel bars of different lengths and ensuring that the steel bars can be adequately cooled in the cooling control pipe 105, thereby improving the flexibility of steel bar production; at the same time, the liner tube 110 is easy to repair and replace without disassembling the entire liner tube 110, thereby reducing the downtime for maintenance or replacement of the liner tube 110, improving production continuity, and thus improving work efficiency.

[0040] like Figure 3 As shown, the inner diameters of the two ends of the plurality of liner tubes 110 are larger than the inner diameters of the middle portions thereof.

[0041] Specifically, since the inner diameters at both ends of the plurality of liner tubes 110 are larger than the inner diameter in the middle, the cooling medium forms turbulence in the liner tubes 110, which increases the heat transfer rate between the cooling medium and the surface of the steel bar, thereby accelerating the cooling speed of the steel bar, allowing the steel bar to be appropriately cooled to the required temperature in a short time, further improving the cooling efficiency of the steel bar.

[0042] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A hot rolled steel bar post-rolling controlled cooling device, arranged between a finished product rolling mill outlet (101) and a pre-cutting shear (102), characterized in that: include: A base (103), wherein support frames (104) are respectively provided at two ends of the top of the base (103); A cooling control pipe (105), wherein the cooling control pipe (105) is arranged between the support frames (104) at both ends; The pipe inlet and the pipe outlet of the cooling control pipe (105) are both open and correspond to the roller table of the finished product rolling mill outlet (101) and the roller table of the ready-to-length shear (102) respectively; The cooling control pipe (105) is provided with a nozzle seat (106), and a spray component is provided in the nozzle seat (106); A water inlet pipe (107) is provided on the top of the nozzle seat (106); The length of the cooling control pipe (105) is shorter than the length of the steel bar.

2. The hot rolled steel bar post-rolling controlled cooling device according to claim 1, characterized in that: The spray component comprises a first nozzle (108) and a second nozzle (109) arranged on one side of the first nozzle (108); the first nozzle (108) is an outer conical surface, and the second nozzle (109) is an inner conical surface.

3. The hot rolled steel bar post-rolling controlled cooling device according to claim 1, characterized in that: The cooling control pipe (105) includes a plurality of liner pipes (110), and adjacent liner pipes (110) are detachably connected.

4. The hot rolled steel bar post-rolling controlled cooling device according to claim 3, characterized in that: The inner diameters of the two ends of the plurality of liner tubes (110) are larger than the inner diameter of the middle part.

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