Outlet guide base, roller cooling device, steel rolling device and bar rolling system

Abstract

The utility model relates to an outlet guide base, a roller cooling device, a steel rolling device and a bar rolling system. The outlet guide and guard base comprises an outlet guide and guard base body, a medium-pressure nozzle and two low-pressure nozzles, wherein the medium-pressure nozzle and the two low-pressure nozzles are fixedly arranged on the outlet guide and guard base body, and the two low-pressure nozzles are located on the two sides of the medium-pressure nozzle respectively. Compared with the prior art, the outlet guide and guard base has the advantages that the medium-pressure nozzle and the two low-pressure nozzles are fixedly arranged on the outlet guide and guard base body, and the two low-pressure nozzles are respectively positioned on two sides of the medium-pressure nozzle, so that the two low-pressure nozzles and the medium-pressure nozzle can be accurately aligned with a rolling groove to be cooled, and heat on the surface of the rolling groove is effectively taken away; and meanwhile, the problem that in the prior art, a traditional hose connecting mode causes nozzle displacement in the rolling process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel rolling, and particularly relates to an outlet guide base, a roller cooling device, a steel rolling device and a bar rolling system. Background Art

[0002] In recent years, my country's infrastructure construction has achieved rapid development, and the demand for bar profiles in steel products has grown rapidly. Bars, also known as ordinary cross-section profiles or simple cross-section profiles, refer to straight strip products of metal plastic processing with a considerable ratio of length to cross-section perimeter and no obvious concave and convex parts in the cross section, including square, round, deformed and hexagonal profiles. Bars can be divided into two categories: steel and non-ferrous metal alloys. Common non-ferrous metal alloys are copper profiles and aluminum profiles (both of which are usually used in the power industry).

[0003] As the steel market gradually matures, market competition is becoming increasingly fierce. In this fierce market competition environment, how to reduce production costs, reduce energy consumption and increase production capacity has become a major challenge facing major steel rolling companies.

[0004] The rollers of the bar rolling mill are cooled by 0.4-0.6Mpa turbid circulating water. Generally, the rough rolling capacity of each single groove is about 15,000-20,000 tons. Under this condition, the rolling must be carried out by reloading 15-20mm before going back online. For example, the patent document with publication number CN204620640U discloses a roller water-gas cooling device, including a compressed air pipeline and a cooling water pipeline, the front end of the compressed air pipeline is connected to the compressed air source, and the compressed air pipeline is sequentially installed with a pressure regulating valve, an air inlet valve and a water-gas nozzle pipeline device from front to back, the front end of the cooling water pipeline is connected to the cooling water source, and the cooling water pipeline is sequentially installed with a water inlet valve, a throttle valve and a water-gas nozzle pipeline device from front to back.

[0005] However, when the existing roll water cooling device is used to cool the rolls of the bar rolling mill, when the rolling speed is continuously increased (the single-line production capacity is increased), the cooling water in the roll groove is easy to form a thick air pattern on the roll surface under the action of high temperature, and it is difficult to take away the heat of the roll groove surface in time, resulting in the aggravation of the thermal crack diffusion phenomenon on the roll surface, thereby reducing the service life of the roll groove; and, in this case, the production process needs to be forced to replace the roll groove, which increases the downtime, reduces the production capacity, increases the replacement frequency of the roll, and increases the production cost. Utility Model Content

[0006] In view of the shortcomings of the prior art mentioned above, the purpose of the utility model is to provide an exit guide base, a roll cooling device, a steel rolling device and a bar rolling system to solve the above-mentioned technical problems of using the existing roll water cooling device to cool the rolls of the bar rolling mill. When the rolling speed continues to increase (the single-line production capacity increases), the cooling water in the rolling groove is prone to form a thicker air mold on the surface of the roll under the action of high temperature, which makes it difficult to take away the heat of the rolling groove surface in time, causing the thermal crack diffusion phenomenon on the roll surface to intensify, thereby reducing the service life of the rolling groove; and, in this case, the production process needs to be forced to replace the rolling groove, which increases the downtime, reduces the production capacity, increases the replacement frequency of the rolls, and increases the production cost.

[0007] In some embodiments, the utility model provides an outlet guide base, which includes an outlet guide base body and a medium-pressure nozzle and two low-pressure nozzles fixedly arranged on the outlet guide base body, and the two low-pressure nozzles are respectively located on both sides of the medium-pressure nozzle.

[0008] The principle of the outlet guide base of the utility model is as follows: compared with the single cooling water system method adopted in the prior art, by adding a medium-pressure nozzle, it is possible to overcome the disadvantage that only a low-pressure nozzle cannot effectively break the hot air film or the contradiction that only medium-pressure water is used to cause water spraying on the rolling groove and splashing back and failing to take away the heat on the surface of the rolling groove in time; by fixing the medium-pressure nozzle and two low-pressure nozzles on the outlet guide base body, and locating the two low-pressure nozzles on both sides of the medium-pressure nozzle respectively, the two low-pressure nozzles and the medium-pressure nozzle can be accurately aimed at the rolling groove to be cooled, effectively taking away the heat on the surface of the rolling groove, improving the service life of the rolling rollers, improving the service life of the rolling rollers, reducing the frequency of rolling roller replacement and downtime during production, improving production efficiency, reducing production costs, and at the same time overcoming the problem of nozzle displacement caused by the traditional hose connection method in the prior art during the rolling process.

[0009] In some embodiments, the utility model also provides a roller cooling device, which includes the outlet guide base as described above, the medium-pressure nozzle is connected to a first cooling water pipeline, and the two low-pressure nozzles are connected to a second cooling water pipeline.

[0010] Optionally, a first liquid flow meter is provided on the first cooling water pipeline.

[0011] Optionally, a first flow regulating valve is provided on the first cooling water pipeline.

[0012] Optionally, a second liquid flow meter is provided on the second cooling water pipeline.

[0013] Optionally, a second flow regulating valve is provided on the second cooling water pipeline.

[0014] In the utility model, by arranging a first liquid flow meter in the first cooling water pipeline, it is convenient to detect the flow rate of medium-pressure water in the first cooling water pipeline, so that the medium-pressure water can effectively break the hot air film formed on the surface of the rolling groove in the form of high speed and small flow rate; by arranging a second liquid flow meter in the second cooling water pipeline, it is convenient to detect the flow rate of low-pressure water in the second cooling water pipeline, so that the low-pressure water can promptly take away the heat of the rolling groove surface in the late stage of hot air film rupture in the form of large flow rate, thereby improving the life of the rolling roller, reducing the frequency of rolling roller replacement and downtime in the production process, improving production efficiency and reducing production costs.

[0015] In some embodiments, the utility model also provides a steel rolling device, which includes the exit guide base as described above and / or the roll cooling device as described above and two rolls, the two rolls are arranged in parallel, and the medium-pressure nozzle and the two low-pressure nozzles are all facing the rolling groove between the two rolls.

[0016] In some embodiments, the medium pressure nozzle and the roller form an angle of 25-35 degrees.

[0017] In some embodiments, the low-pressure nozzle and the roller form an angle of 45-70°.

[0018] In some embodiments, the utility model further provides a bar rolling system, which includes the exit guide base as described above and / or the roll cooling device as described above and / or the steel rolling device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 This is a schematic structural diagram of an outlet guide base shown as an exemplary embodiment of the utility model;

[0021] Figure 2 A schematic structural diagram of a roller cooling device is shown as an exemplary embodiment of the utility model;

[0022] Figure 3 The present invention is a schematic structural diagram of a steel rolling device according to an exemplary embodiment of the present invention.

[0023] Reference numerals

[0024] 1- outlet guide base body, 11- medium pressure nozzle, 12- low pressure nozzle;

[0025] 2-first cooling water pipeline, 3-second cooling water pipeline;

[0026] 4- Roller;

[0027] 5-Hot air film. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of the utility model.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] The present invention is described in detail below through specific examples. It should also be understood that the following examples are only used to specifically illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention belong to the scope of protection of the present invention. In the prior art, the rollers of the bar rolling mill are cooled by 0.4-0.6Mpa turbid circulating water. Generally, the single groove rolling capacity of rough rolling is about 15,000-20,000 tons each time. Under this condition, the rolling must be carried out offline and reloaded by 15-20mm before going online. However, when the existing roller water cooling device is used to cool the rollers of the bar mill, when the rolling speed is continuously increased (single-line capacity is increased), the cooling water in the rolling groove is easy to form a thick air mold on the roller surface under the action of high temperature, and it is difficult to take away the heat of the rolling groove surface in time, resulting in the aggravation of the thermal crack diffusion phenomenon on the roller surface, thereby reducing the service life of the rolling groove; and in this case, the production process needs to be forced to replace the rolling groove, which increases the downtime, reduces the capacity, increases the replacement frequency of the roller, and increases the production cost. In order to solve this technical problem, the utility model proposes an outlet guide base, a roller cooling device, a steel rolling device and a bar rolling system.

[0032] like Figure 1 As shown, in an exemplary embodiment, the utility model provides an outlet guide base, which includes an outlet guide base body 1 and a medium-pressure nozzle 11 and two low-pressure nozzles 12 fixedly arranged on the outlet guide base body 1, and the two low-pressure nozzles 12 are respectively located on both sides of the medium-pressure nozzle 11.

[0033] The principle of the outlet guide base of the present embodiment is as follows: compared with the single cooling water system method adopted in the prior art, the outlet guide base of the present embodiment can overcome the disadvantage that only low-pressure nozzles cannot effectively break the hot air film or only medium-pressure water (pressure is 0.6-0.8MPa) is used to cause water to splash back on the rolling groove and cannot take away the heat on the surface of the rolling groove in time by adding a medium-pressure nozzle 11; by fixing the medium-pressure nozzle 11 and two low-pressure nozzles 12 on the main body of the outlet guide base, and locating the two low-pressure nozzles 12 on both sides of the medium-pressure nozzle 11 respectively, the two low-pressure nozzles 12 and the medium-pressure nozzle 11 can be accurately aimed at the rolling groove to be cooled, effectively taking away the heat on the surface of the rolling groove, improving the service life of the rollers, reducing the frequency of roller replacement and downtime during production, improving production efficiency, reducing production costs, and at the same time overcoming the problem of nozzle displacement caused by the traditional hose connection method in the prior art during the rolling process.

[0034] like Figure 2 As shown, in an exemplary embodiment, the utility model also provides a roller cooling device, the roller cooling device includes Figure 1The outlet guide base, wherein the medium-pressure nozzle 11 is connected to the first cooling water pipeline 2, the first cooling water pipeline 2 is provided with a first liquid flow meter (not shown) and a first flow regulating valve (not shown), and the two low-pressure nozzles 12 are connected to the second cooling water pipeline 3, the second cooling water pipeline 3 is provided with a second liquid flow meter (not shown) and a second flow regulating valve (not shown).

[0035] In the utility model, by arranging a first liquid flowmeter in the first cooling water pipeline 2, it is convenient to detect the flow rate of medium-pressure water in the first cooling water pipeline 2, so that the medium-pressure water (pressure is 0.6-0.8MPa) can effectively break the hot air film formed on the surface of the rolling groove in the form of high speed and small flow rate (for example, flow rate of 6m / s, flow rate of 4L / min); by arranging a second liquid flowmeter in the second cooling water pipeline 3, it is convenient to detect the flow rate of low-pressure water in the second cooling water pipeline 3, so that the low-pressure water (pressure is 0.4-0.6MPa) can timely take away the heat of the rolling groove surface in the late stage of hot air film rupture in the form of large flow rate (for example, flow rate of 3m / s, flow rate of 8L / min), thereby improving the life of the rolling roller, reducing the frequency of rolling roller replacement and downtime in the production process, improving production efficiency and reducing production costs.

[0036] like Figure 3 As shown, in an exemplary embodiment, the utility model also provides a steel rolling device, which includes the outlet guide base as described above and / or the roll cooling device as described above and two rolls 2, the two rolls 2 are arranged in parallel, and the medium-pressure nozzle and the two low-pressure nozzles are all facing the groove between the two rolls, wherein the medium-pressure nozzle 11 and the roll 4 form an angle of 25-35°, and the low-pressure nozzle 12 and the roll 4 form an angle of 45-70°.

[0037] In the utility model, the medium-pressure nozzle and the two low-pressure nozzles are all facing the rolling groove between the two rollers, and the medium-pressure nozzle 11 and the roller 4 form an angle of 25-35°, which can effectively break the hot air film 5 formed on the surface of the rolling groove in the form of high speed and small flow rate (for example, flow rate of 6m / s, flow rate of 4L / min) through the medium-pressure water sprayed by the medium-pressure nozzle 11; the low-pressure nozzle 12 and the roller 4 form an angle of 45-70°, which can timely take away the heat of the rolling groove surface inside the hot air film 5 in the late stage of rupture in the form of low-pressure water (pressure of 0.4-0.6MPa) sprayed by the low-pressure nozzle 12 in the form of large flow rate (for example, flow rate of 3m / s, flow rate of 8L / min), thereby improving the life of the roller, reducing the frequency of roller replacement and downtime in the production process, improving production efficiency, and reducing production costs.

[0038] In some embodiments, the utility model further provides a bar rolling system, which includes the exit guide base as described above and / or the roll cooling device as described above and / or the steel rolling device as described above.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An outlet guide base, characterized in that: The outlet guide base includes an outlet guide base body, a medium-pressure nozzle and two low-pressure nozzles fixedly arranged on the outlet guide base body, and the two low-pressure nozzles are respectively located on both sides of the medium-pressure nozzle.

2. A roller cooling device, characterized in that: The roller cooling device comprises the outlet guide base as claimed in claim 1, the medium-pressure nozzle is connected to a first cooling water pipeline, and the two low-pressure nozzles are connected to a second cooling water pipeline.

3. The roller cooling device according to claim 2, characterized in that: The first cooling water pipeline is provided with a first liquid flow meter.

4. The roller cooling device according to claim 2, characterized in that: The first cooling water pipeline is provided with a first flow regulating valve.

5. The roller cooling device according to claim 2, characterized in that: A second liquid flow meter is provided on the second cooling water pipeline.

6. The roller cooling device according to claim 2, characterized in that: A second flow regulating valve is provided on the second cooling water pipeline.

7. A steel rolling device, characterized in that: The steel rolling device includes the exit guide base as described in claim 1 and / or the roller cooling device as described in any one of claims 2-6 and two rollers, the two rollers are arranged in parallel, and the medium-pressure nozzle and the two low-pressure nozzles are all facing the rolling groove between the two rollers.

8. The steel rolling device according to claim 7, characterized in that: The medium-pressure nozzle and the roller form an angle of 25-35°.

9. The steel rolling device according to claim 7, characterized in that: The low-pressure nozzle and the roller form an angle of 45-70 degrees.

10. A bar rolling system, characterized in that: The bar rolling system comprises the exit guide base as described in claim 1 and / or the roll cooling device as described in any one of claims 2-6 and / or the steel rolling device as described in any one of claims 7-9.

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