Controlled-rolling and controlled-cooling steel rolling equipment

Abstract

The utility model relates to the technical field of steel rolling, and discloses controlled rolling and controlled cooling steel rolling equipment which comprises a steel rolling machine and a roller arranged in the steel rolling machine and used for steel rolling, a conical sleeve is installed on the inner side of the steel rolling machine and located below the roller, a leakage hole is formed in the top face of the conical sleeve, and the bottom face of the conical sleeve is fixedly connected with the bottom face of the inner side of the steel rolling machine. A through hole is formed in the joint of the bottom face of the inner side of the rolling mill and the bottom of the conical sleeve, and a controlled rolling and controlled cooling structure is connected below the through hole. According to the utility model, the cooling oil is heated by the resistance heating belt in the cooling oil tank to enable the temperature of the cooling oil to rise to 100-300 DEG C, and once the cooling oil at normal temperature is required for rapid cooling during steel rolling, the resistance heating belt is not started, so that the temperature difference from the cooling oil at the normal temperature state to the maximum value is three hundred degrees enough to cope with the cooling temperatures of different degrees during steel rolling; and the beneficial effect that different temperatures can be adjusted for steel rolling cooling control is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling, in particular to a steel rolling equipment with controlled rolling and controlled cooling. Background Art

[0002] Steel rolling equipment is equipment used to process metal billets (such as steel, aluminum, etc.). Steel rolling equipment is usually used to manufacture steel products, such as steel plates, steel pipes, and steel rails. Steel rolling requires controlled rolling and cooling during the rolling process. The purpose of controlled rolling is to control the shape and size of the steel by controlling the parameters in the rolling process (such as rolling force, rolling temperature, etc.) to ensure that the steel meets the design requirements. The purpose of controlled cooling is to control the organizational structure and mechanical properties of the steel by controlling the parameters in the cooling process (such as cooling rate, cooling method, etc.), as well as to eliminate or reduce internal stress and defects.

[0003] A controlled rolling equipment in the steel rolling process with the publication number of CN 210730545 U is retrieved, comprising a controlled rolling box, the controlled rolling box comprising a first cooling chamber, a second cooling chamber, and a third cooling chamber, a feed port is provided on one side of the first cooling chamber, a discharge port is provided on one side of the third cooling chamber, and a conveyor frame is provided between the feed port and the discharge port. The controlled rolling equipment in the steel rolling process performs multi-stage orderly cooling of the rolled steel by setting three cooling chambers to achieve a better controlled rolling effect of the rolled steel, wherein a heat-insulating layer of insulating material is provided in the middle of the wall plate of the first cooling box, and a steam outlet with a sealing cover is provided in the middle of the upper end of the first cooling box. When the sealing cover is opened, conventional water cooling can be performed; if the sealing cover is closed, the running speed of the conveyor frame is reduced, and the effect of slow cooling can be achieved. The equipment is not only simple to operate, but also suitable for a variety of occasions and can be widely promoted.

[0004] Although the above technical solution uses three cooling chambers to perform graded cooling on the rolled steel to achieve the effect of controlled rolling and controlled cooling, the three cooling chambers require extending the rolling mill production line, resulting in huge cost expenditure. At the same time, the three cooling chambers are installed in sequence, so the temperature of the rolled steel can only be reduced in sequence, or it can only be cooled when entering the designated cooling chamber, and the cooling temperature cannot be adjusted autonomously. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a steel rolling equipment with controlled rolling and controlled cooling, which has the advantages of controlled rolling and temperature of the steel, lower cost, compact structure and high efficiency, and can adjust different temperatures for cooling the steel, thereby solving the above-mentioned technical problems.

[0007] Technical Solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel rolling equipment with controlled rolling and cooling, comprising a steel rolling mill and a rolling roller arranged inside the steel rolling mill for rolling steel, a nozzle for spraying cooling water is installed inside the steel rolling mill above the rolling roller, a conical sleeve is installed inside the steel rolling mill below the rolling roller, a leakage hole is provided on the top surface of the conical sleeve and the bottom surface is fixedly connected to the inner bottom surface of the steel rolling mill, a through hole is provided at the connection between the inner bottom surface of the steel rolling mill and the bottom of the conical sleeve, a controlled rolling and cooling structure is connected below the through hole, the controlled rolling and cooling structure comprises a cooling oil groove, a resistance heating belt is installed at the inner bottom of the cooling oil groove, and a guide structure for guiding the cooling oil in the cooling oil groove upward from the through hole is also installed above the inner side of the cooling oil groove.

[0009] As a preferred technical solution of the utility model, the conical sleeve is hollow inside and has a conical top and a cylindrical bottom. The hollow bottom of the conical sleeve is aligned with the through hole.

[0010] As a preferred technical solution of the utility model, the leakage hole is circumferentially opened on the top surface of the conical sleeve and penetrates through and connects to the inside of the conical sleeve.

[0011] As the preferred technical solution of the utility model, the cooling oil tank is opened on the inner side of the bottom of the rolling mill, and the cooling oil tank is filled with cooling oil. The resistance heating belt is symmetrically installed on both sides of the middle end of the inner bottom of the cooling oil tank and is fixedly connected to the inner wall of the cooling oil tank. The starting end of the resistance heating belt is connected to the rolling mill operating table through an electric wire.

[0012] As the preferred technical solution of the utility model, the guide structure includes limit rods which are laterally symmetrically installed at the two ends of the top of the inner side of the cooling oil tank. The surfaces of the two limit rods are slidably connected to slide plates. The slide plates are two and are respectively located at the front and rear ends of the cooling oil tank. A through hole is opened at the bottom of the slide plate for the resistance heating belt to pass through. Screw holes are opened in the central parts of the two slide plates. The internal threads of the screw holes are connected to double-headed screws. The tail end of the double-headed screw passes through the head end of the cooling oil tank and is connected to the drive motor installed at the bottom of the outer side of the rolling mill.

[0013] As a preferred technical solution of the utility model, a refueling hole is also provided on the side wall of the cooling oil tank, and the refueling hole is connected to a drainage pipe installed on the outer side wall of the rolling mill, and the drainage pipe is provided with a valve.

[0014] Compared with the prior art, the utility model provides a steel rolling equipment with controlled rolling and controlled cooling, which has the following beneficial effects:

[0015] 1. The utility model heats the cooling oil through the resistance heating belt inside the cooling oil tank to raise its temperature to 100℃-300℃. The temperature difference of 300 degrees from the cooling oil at room temperature to the maximum value is sufficient to cope with different degrees of cooling temperature of steel rolling. When the double-headed screw rotates, the two slides connected to it will be relatively close or relatively separated. Once the two slides are relatively close, the cooling oil inside the cooling oil tank will be compressed. When the cooling oil receives pressure, it will quickly flow to the through hole above the cooling oil tank and form a pressure flow through the through hole. At this time, the cooling oil continues to spray out through the leakage hole opened by the tapered sleeve through the through hole to contact the steel rolling and cool it, thereby achieving the beneficial effects of controlling the rolling and temperature of the steel rolling while having lower cost, compact structure and high efficiency.

[0016] 2. The utility model heats the cooling oil through the resistance heating belt inside the cooling oil tank to raise its temperature to 100℃-300℃. Once the steel rolling needs the cooling oil at room temperature for rapid cooling, the resistance heating belt will not be turned on. The temperature difference of 300 degrees from the cooling oil at room temperature to the maximum value is sufficient to cope with different degrees of cooling temperature of steel rolling, achieving the beneficial effect of cooling and controlling the temperature of steel rolling and adjusting different temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front section of the steel rolling mill structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the cooling oil tank structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the conical sleeve of the utility model.

[0021] Among them: 1. rolling mill; 101. through hole; 2. rolling roller; 3. tapered sleeve; 301. leakage hole; 4. cooling oil tank; 401. resistance heating belt; 5. guide structure; 501. limit rod; 502. slide plate; 503. through port; 504. screw hole; 505. double-headed screw; 6. oil filling hole; 601. drainage pipe. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-4 A steel rolling equipment with controlled rolling and controlled cooling comprises a steel rolling mill 1 and a roller 2 for steel rolling arranged inside the steel rolling mill 1, a nozzle for spraying cooling water is installed above the roller 2 inside the steel rolling mill 1, a conical sleeve 3 is installed inside the steel rolling mill 1 below the roller 2, a leakage hole 301 is provided on the top surface of the conical sleeve 3 and the bottom surface is fixedly connected to the inner bottom surface of the steel rolling mill 1, a through hole 101 is provided at the connection between the inner bottom surface of the steel rolling mill 1 and the bottom of the conical sleeve 3, a controlled rolling and controlled cooling structure is connected below the through hole, the controlled rolling and controlled cooling structure comprises a cooling oil groove 4, a resistance heating belt 401 is installed at the inner bottom of the cooling oil groove 4, and a guide structure 5 for guiding the cooling oil in the cooling oil groove 4 upward from the through hole is also installed above the inner side of the cooling oil groove 4.

[0026] Furthermore, the rolling mill 1 is an existing equipment technology, and its specific operating principle has been disclosed in the background technology and cited documents, and its rolling principle will not be described here.

[0027] Furthermore, the high-temperature steel is rolled by the rollers 2 inside the rolling mill 1, and at the same time, the nozzle is used to spray cooling oil on the top of the rolled steel. When rapid cooling is required, the controlled rolling and controlled cooling structure is used to spray and coordinate the cooling. The cooling oils mentioned in this application are all existing products used for steel rolling and are not within the scope of improvement.

[0028] Furthermore, the cooling oil is heated by the resistance heating belt 401 inside the cooling oil tank 4 to raise its temperature to 100°C-300°C. Once the steel rolling requires cooling oil at room temperature for rapid cooling, the resistance heating belt 401 will not be turned on. The temperature difference of 300 degrees from the cooling oil at room temperature to the maximum value is sufficient to cope with different degrees of cooling temperature of the steel rolling. Since the temperature of hot-rolled steel is 800°C, the cooling oil with a maximum temperature of 300 degrees will not cause rapid cooling of the steel when sprayed onto the steel rolling through the conical sleeve 3, resulting in increased metal brittleness and stress. Furthermore, the cooling oil itself has high thermal conductivity, and even if the oil temperature is too high, it is still far lower than the steel rolling temperature.

[0029] When cooling oil is needed to cool the rolled steel, the double-headed screw 505 is driven to rotate by a drive motor connected to the double-headed screw 505, wherein the drive motor is shown in the attached specification of this application. Figure 2 The outer side of the double-headed screw 505 is isolated by the box body to prevent the high temperature from affecting it. When the double-headed screw 505 rotates, the two slides 502 connected to it will be relatively close or relatively separated. Once the two slides 502 are relatively close, the cooling oil inside the cooling oil tank 4 will be compressed. When the cooling oil receives pressure, it will quickly flow to the through hole 101 above the cooling oil tank and shrink and pressurize through the through hole 101 to form a pressure flow. At this time, the cooling oil continues to pass through the through hole 101 through the leakage hole 301 opened by the tapered sleeve 3 to spray outward to contact the rolled steel for cooling. Since the resistance heating belt 401 is located inside the cooling oil tank 4, the heating temperature of the cooling oil is directly adjusted by the resistance heating belt, thereby realizing free regulation of the cooling temperature.

[0030] Furthermore, since the leakage hole 301 is opened on the top surface of the conical sleeve 3, and the bottom of the conical sleeve 3 is at a distance from the bottom surface of the rolling mill 1, the high-temperature cooling oil after the heat is transferred by the rolled steel will not return to the cooling oil tank 4 and damage the resistance heating belt 401. This part of the high-temperature cooling oil will be recovered by the recovery structure carried by the rolling mill 1 itself.

[0031] Furthermore, when the cooling oil in the cooling oil tank 4 is insufficient, the cooling oil can be replenished by opening the valve of the drainage pipe 601 and pumping the cooling oil from the filling hole 6 into the cooling oil tank using a pump.

[0032] When in use, high-temperature steel is rolled by the rollers 2 inside the rolling mill 1. When the steel needs to be cooled, the cooling oil is heated by the resistance heating belt 401 inside the cooling oil tank 4 to raise its temperature to 100°C-300°C. Once the steel needs cooling oil at room temperature for rapid cooling, the resistance heating belt 401 is not turned on. The temperature difference of 300 degrees from the cooling oil at room temperature to the maximum value is sufficient to cope with different degrees of cooling temperature of the steel. The driving motor is further started to drive the double-headed screw 505. When the double-headed screw 505 rotates, the two slides 502 connected to it will be relatively close or relatively separated. Once the two slides 502 are relatively close, the cooling oil tank will be compressed. 4, when the cooling oil receives pressure, it will quickly flow to the through hole 101 above the cooling oil tank and shrink and pressurize through the through hole 101 to form a pressure flow. At this time, the cooling oil continues to spray out through the through hole 101 through the leak hole 301 opened by the tapered sleeve 3 to contact the rolled steel for cooling. Since the resistance heating belt 401 is located inside the cooling oil tank 4, the heating temperature of the cooling oil is directly adjusted by the resistance heating belt, so that the cooling temperature can be freely adjusted. Furthermore, when the high-temperature cooling oil needs to be reduced to a low temperature, the valve of the drainage pipe 601 is directly opened and the pump is used to replace the normal-temperature cooling oil to quickly cool the cooling oil, and the low-temperature cooling oil can be used to control the cooling of the rolled steel.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel rolling equipment with controlled rolling and controlled cooling, comprising a steel rolling mill (1) and a roller (2) arranged inside the steel rolling mill (1) for rolling steel, wherein a nozzle for spraying cooling water is installed above the roller (2) inside the steel rolling mill (1), characterized in that: A conical sleeve (3) is installed on the inner side of the rolling mill (1) below the rolling roller (2), a leak hole (301) is provided on the top surface of the conical sleeve (3) and the bottom surface is fixedly connected to the inner bottom surface of the rolling mill (1), a through hole (101) is provided at the connection between the inner bottom surface of the rolling mill (1) and the bottom of the conical sleeve (3), a controlled rolling and controlled cooling structure is connected below the through hole, the controlled rolling and controlled cooling structure comprises a cooling oil groove (4), a resistance heating belt (401) is installed at the inner bottom of the cooling oil groove (4), and a guide structure (5) for guiding the cooling oil in the cooling oil groove (4) upward from the through hole is also installed above the inner side of the cooling oil groove (4).

2. The steel rolling equipment with controlled rolling and controlled cooling according to claim 1, characterized in that: The conical sleeve (3) is hollow inside and has a conical top and a cylindrical bottom. The hollow bottom of the conical sleeve (3) is aligned with the through hole (101).

3. The steel rolling equipment with controlled rolling and controlled cooling according to claim 1, characterized in that: The leakage hole (301) is circumferentially opened on the top surface of the conical sleeve (3) and penetrates through the top surface to connect with the interior of the conical sleeve (3).

4. The steel rolling equipment with controlled rolling and controlled cooling according to claim 1, characterized in that: The cooling oil tank (4) is opened on the inner side of the bottom of the rolling mill (1), and cooling oil is poured into the cooling oil tank. The resistance heating belt (401) is symmetrically installed on both sides of the middle end of the inner bottom of the cooling oil tank (4) and is fixedly connected to the inner wall of the cooling oil tank (4). The starting end of the resistance heating belt (401) is connected to the operating table of the rolling mill (1) through an electric wire.

5. The steel rolling equipment with controlled rolling and controlled cooling according to claim 1, characterized in that: The guide structure comprises limit rods (501) which are symmetrically installed at the two ends of the inner top of the cooling oil groove (4). The surfaces of the two limit rods (501) are slidably connected to the slide plates (502). The slide plates (502) are in two pieces and are respectively located at the front and rear ends of the cooling oil groove (4). The bottom of the slide plates (502) is provided with a through hole (503) for the resistance heating belt (401) to pass through. The central parts of the two slide plates (502) are provided with screw holes (504). The screw holes (504) are internally threadedly connected to double-headed screws (505). The rear ends of the double-headed screws (505) pass through the head end of the cooling oil groove (4) and are connected to the driving motor installed at the bottom of the outer side of the rolling mill (1).

6. The controlled rolling and controlled cooling steel rolling equipment according to claim 1, characterized in that: The side wall of the cooling oil tank (4) is also provided with a refueling hole (6), and the refueling hole (6) is connected to a drainage pipe (601) installed on the outer side wall of the rolling mill (1), and the drainage pipe (601) is provided with a valve.

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