CN217912170U - Steel rolling roll spray cooling device - Google Patents

Abstract

The utility model discloses a spray cooling device for a rolling mill roll, which comprises a frame, an upper roll arranged on the frame, a spray mechanism, a water supply mechanism and a spray angle adjusting mechanism, wherein the spray mechanism comprises a water supply pipe, a spray pipe, a rotary joint, a rotary pipe and a fan-shaped nozzle; the water supply mechanism is connected with the water supply pipe and is used for supplying water to the water supply pipe; the spraying angle adjusting mechanism is in transmission connection with the water supply pipe. Through cooling off the upper roll earlier, make fan nozzle cover the scope on upper roll cross-section circumference the biggest, and water pressure is lower, the volume of spraying is less, make the upper roll evenly cool off with slow speed as far as possible, the upper roll cools off to the certain degree, readjust fan nozzle's spray angle and spray direction, it is the biggest to make fan nozzle's the plane of spray cover area on upper roll axis direction, and more be close to the upper roll, the electric control valve aperture is increaseed, fan nozzle blowout high pressure coolant liquid, cooling speed and cooling effect are improved.

Description

Steel rolling roll spray cooling device

Technical Field

The utility model relates to a hot rolling equipment technical field, especially a steel rolling roll spray cooling device.

Background

The rolls are important parts of rolling mills in steel rolling mills, and roll steel by using pressure generated when a pair or a group of rolls roll. It mainly bears the influence of dynamic and static load, abrasion and temperature change during rolling. Mechanical stress during rolling is related to thermal stress of the roll, and particularly, the mechanical stress is more easily generated when the temperature difference between the surface of the roll body and the core part is large. Such temperature differences may be caused by poor roll cooling, cooling interruptions or overheating of the roll surface at the start of a new rolling cycle. The large temperature difference between the surface and the core of the roll causes large thermal stress, and the mechanical stress and the residual stress of the roll exceed the core strength of the roll to cause roll breakage. For example, the roll may increase the longitudinal thermal stress by 100MPa at a temperature difference of 70 ℃ between the roll surface and the core, the greater the temperature difference, the greater the increased thermal stress. In addition, the surface of the roller is heated due to heat conduction of a workpiece during rolling, and the surface is damaged due to unreasonable cooling process, namely, too fast or too slow, if too fast, crystal grains in the surface become coarse, the toughness is influenced, and brittle fracture is easy to occur; and if the rate is too slow, the carbide particles in the metal are not in dispersed distribution, and a certain hard layer depth cannot be ensured.

The patent with the publication number of CN201172060 is a roller body spray cooling device, including the shower, the shower sets up in the preceding one side of rolling, guarantees that the contained angle alpha of spray direction and roller excircle jet point tangential direction is 45-50, the utility model discloses a roller body spray cooling device adjusts the spray angle of shower, can guarantee to make the roller even, fully cool off, avoids because the hot convexity of roller that the cooling problem appears is not good and the not good condition of rolled piece cooling effect, and because the cooling is abundant even, makes the cooling effect of rolled piece better, applicable in high-speed steel rolling technology.

The cooling process of the spray pipes of the device is unreasonable, the roller is cooled through the spray pipes 1 and the two spray pipes I, the roller is cooled too fast in the early stage and is easily brittle, the water outlet angle and the water outlet distance cannot be adjusted according to different stages of roller cooling, the roller cooling effect is difficult to control, and the cooling efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a spray cooling device for a rolling roll.

In order to achieve the purpose, the utility model provides a steel rolling roll spray cooling device, including the frame and the upper roll of installing in the frame, still include spray mechanism, water supply mechanism and spray angle adjustment mechanism, upper roll bilateral symmetry is provided with spray mechanism, spray mechanism includes water supply pipe, shower, rotary joint, swivel pipe, fan-shaped nozzle, driven gear, first driving motor and driving gear, and water supply pipe one end is rotated and is installed in the frame, and the shower is installed to the water supply pipe other end, and shower and upper roll parallel arrangement are installed to the shower, install a plurality of equidistance on the shower and be the rotary joint of linear arrangement, and the swivel pipe is installed to the swivel joint other end, and the fan-shaped nozzle is installed to the swivel pipe other end, installs first driven gear on the swivel pipe, and each first driven gear meshing connection, first driving motor and water supply pipe fixed connection, and first driving gear is installed to first driving motor output, and first driven gear meshing connection; the water supply mechanism is connected with the water supply pipe and used for supplying water to the water supply pipe, and the spraying angle adjusting mechanism is in transmission connection with the water supply pipe and used for driving the water supply pipe to rotate so as to adjust the distance and the angle between the fan-shaped nozzles and the upper roller.

Preferably, the water supply mechanism comprises a high-pressure pump, a water inlet pipe, a three-way pipe and two branch water outlet pipes, wherein the input end of the high-pressure pump is communicated with the water inlet pipe, the output end of the high-pressure pump is communicated with the two branch water outlet pipes through the three-way pipe, the branch water outlet pipes are in one-to-one correspondence with the water conveying pipes, and the branch water outlet pipes are communicated with the water conveying pipes corresponding to the branch water outlet pipes.

Preferably, the branch water outlet pipe is provided with an electric regulating valve.

Preferably, a mounting frame is fixed on the water supply pipe, and the first driving motor is fixedly mounted on the mounting frame.

Preferably, the number of the spraying angle adjusting mechanisms is two, and the two spraying angle adjusting mechanisms correspond to the spraying mechanisms one by one; the spraying angle adjusting mechanism comprises a second driving motor, a worm and gear speed reducer, a second driving gear and a second driven gear, the second driving motor and the worm and gear speed reducer are fixedly installed on the rack, the output end of the second driving motor is connected with the input end of the worm and gear speed reducer, the output end of the worm and gear speed reducer is installed, the second driving gear is installed on a pipe section, parallel to the spraying pipe, of the water conveying pipe and is meshed with the second driving gear, and the second driven gear is connected with the second driving gear.

Preferably, the fan-shaped nozzles of the two spraying mechanisms are arranged in a staggered manner.

Compared with the prior art, the technical scheme has the following beneficial effects: when the upper roller is firstly cooled, the opening of the electric regulating valve is adjusted to be small, the spraying surface of the fan-shaped nozzle is in a state perpendicular to the axis of the upper roller, the covering range of the fan-shaped nozzle on the section circumference of the upper roller is maximized, the spraying coverage can be increased, the area proportion of the surface of the upper roller contacting with the cooling liquid is maximized, the water pressure is low, the spraying amount is small, the upper roller is uniformly cooled as far as possible at a low speed, the upper roller is cooled to a certain degree and then is rapidly cooled, the spraying angle and the spraying direction of the fan-shaped nozzle are regulated, the covering area of the spraying surface of the fan-shaped nozzle in the axis direction of the upper roller is maximized, the spraying surface is closer to the upper roller, the opening of the electric regulating valve is adjusted to be large, the fan-shaped nozzle sprays high-pressure cooling liquid to break through a protective film on the surface of the upper roller, and the cooling speed and the cooling effect are improved.

Drawings

Fig. 1 is a first working state diagram of an embodiment of the present invention;

fig. 2 is a second working state diagram according to an embodiment of the present invention;

fig. 3 is a top view of an embodiment of the present invention;

fig. 4 is a side view of a spray mechanism according to an embodiment of the present invention;

fig. 5 is a front view of a spray mechanism according to an embodiment of the present invention;

fig. 6 is a schematic view of the spray cooling device of the present invention applied to the upper and lower rolls;

in the figure, 1, a frame; 2. an upper layer roller; 3. a spraying mechanism; 31. a water supply pipe; 32. a shower pipe; 33. a rotary joint; 34. rotating the tube; 35. a fan-shaped nozzle; 36. a first driven gear; 37. a first drive motor; 38. a first drive gear; 39. a mounting frame; 4. a water supply mechanism; 41. a high pressure pump; 42. a water inlet pipe; 43. a three-way pipe; 44. a branch water outlet pipe; 45. an electric control valve; 5. a spray angle adjusting mechanism; 51. a second drive motor; 52. a worm gear reducer; 53. a second driving gear; 54. a second driven gear.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

Referring to fig. 1 to 5, in an embodiment of the present invention, a spray cooling device for a rolling mill roll includes a frame 1 and an upper roll 2 mounted on the frame 1, and further includes a spray mechanism 3, a water supply mechanism 4 and a spray angle adjusting mechanism 5, the spray mechanisms 3 are symmetrically disposed on both sides of the upper roll 2, the spray mechanism 3 includes a water supply pipe 31, a spray pipe 32, a rotary joint 33, a rotary pipe 34, a fan-shaped nozzle 35, a driven gear, a first driving motor 37 and a driving gear, one end of the water supply pipe 31 is rotatably mounted on the frame 1 through a bearing, the other end of the water supply pipe 31 is mounted with the spray pipe 32, the spray pipe 32 and the upper roll 2 are arranged in parallel, referring to fig. 5, the spray pipe 32 is mounted with a plurality of rotary joints 33 which are linearly arranged at equal intervals, the other end of the rotary joint 33 is mounted with the rotary pipe 34, the other end of the rotary pipe 34 is mounted with the fan-shaped nozzle 35, the rotary pipe 34 is mounted with the first driven gear 36, each first driven gear 36 is engaged with each, the first driving motor 37 is fixedly connected with the water supply pipe 31, the first driving gear 37, the first driving gear 38 is mounted with the first driven gear 36; the water supply mechanism 4 is connected with the water supply pipe 31 and used for supplying water to the water supply pipe 31, and the spraying angle adjusting mechanism 5 is in transmission connection with the water supply pipe 31 and used for driving the water supply pipe 31 to rotate so as to adjust the distance and the angle between the fan-shaped nozzle 35 and the upper-layer roller 2. The first driving motor 37 is a stepping motor, and can precisely drive the first driving gear 38 and the first driven gear 36 to rotate, so as to precisely drive the rotating pipe 34 and the fan-shaped nozzle 35 to rotate for 90 degrees, and change the spraying angle of the fan-shaped nozzle 35; the swivel joint 33 is provided so that the swivel pipe 34 and the fan nozzle 35 can be rotated relative to the shower pipe 32 while maintaining communication with the shower pipe 32.

In order to supply water to the water supply pipe 31 and adjust the water supply amount of the water supply pipe 31 according to the cooling process, please refer to fig. 3, the water supply mechanism 4 includes a high pressure pump 41, a water inlet pipe 42, a three-way pipe 43 and two branch water outlet pipes 44, the input end of the high pressure pump 41 is communicated with the water inlet pipe 42, the input end of the water inlet pipe 42 is communicated with the cooling liquid storage container, the output end of the high pressure pump 41 is communicated with the two branch water outlet pipes 44 through the three-way pipe 43, the branch water outlet pipes 44 are in one-to-one correspondence with the water supply pipes 31, and the branch water outlet pipes 44 are communicated with the water supply pipes 31 corresponding thereto. An electric regulating valve 45 is arranged on the branch water outlet pipe 44. The flow of the branch water outlet pipe 44 can be adjusted by an electric adjusting valve 45.

To facilitate fixing of the first driving motor 37 to the water supply pipe 31, a mounting bracket 39 is fixed to the water supply pipe 31, and the first driving motor 37 is fixedly mounted to the mounting bracket 39.

In order to facilitate the rotation of the spraying mechanisms 3 and thus adjust the spraying angles and distances, please refer to fig. 1-3, two spraying angle adjusting mechanisms 5 are provided and correspond to the spraying mechanisms 3 one by one; the spraying angle adjusting mechanism 5 comprises a second driving motor 51, a worm gear reducer 52, a second driving gear 53 and a second driven gear 54, the second driving motor 51 and the worm gear reducer 52 are fixedly installed on the rack 1, the output end of the second driving motor 51 is connected with the input end of the worm gear reducer 52, the output end of the worm gear reducer 52 is installed, the second driving gear 53 is installed on the water supply pipe 31 and is positioned on a pipe section parallel to the spraying pipe 32, the second driven gear 54 is installed on the pipe section, and the second driven gear 54 is meshed with the second driving gear 53. The second driving motor 51 is a stepping motor, and drives the water supply pipe 31 to rotate after being decelerated by the worm gear reducer 52 and transmitted by the second driving gear 53 and the second driven gear 54, and the worm gear reducer 52 has a self-locking function and can keep the water supply pipe 31 stable.

In order to achieve the most uniform spraying possible, the fan nozzles 35 of the two spraying devices 3 are arranged in a staggered manner. In the initial spraying, the fan-shaped nozzles 35 of the first spraying mechanism 3 can spray and cover the uncovered positions, and the fan-shaped nozzles 35 of the other spraying mechanism 3 can spray and cover the uncovered positions.

In the present embodiment, all the electrical components and the power supplies adapted to the electrical components are connected through wires, and an appropriate controller should be selected according to actual conditions to meet control requirements, specific connection and control sequences.

In this embodiment: when the upper layer roller 2 is cooled, the high-pressure water pump and the electric regulating valve 45 are opened, the opening degree of the electric regulating valve 45 is smaller, the branched water pipe 44 is throttled, the medium flow of the branched water outlet pipe 44 is reduced, the high-pressure water pump 41 pumps cooling liquid into the three-way pipe 43, the branched water outlet pipe 44, the water feeding pipe 31 and the spraying pipe 32 through the water inlet pipe 42, and the cooling liquid is sent into the fan-shaped nozzle 35 through the rotary joint 33 and the rotary pipe 34, referring to fig. 1, the spraying surface of the fan-shaped nozzle 35 is in a state vertical to the axis of the upper roller, the circumferential covering range of the cross section of the upper layer roller 2 of the fan-shaped nozzle 35 is largest, the spraying covering range can be increased, the area proportion of the surface of the upper layer roller 2 contacting the cooling liquid at the same time is maximized, the water pressure is lower, the spraying amount is smaller, the upper layer roller 2 is uniformly cooled as far as possible, and after the upper layer roller 2 rotates for a preset number of turns, the upper layer roller 2 is cooled to a certain degree;

then, a first driving motor 37 and a second driving motor 51 are started, referring to fig. 2, the first driving motor 37 drives the first driven gear 36, the rotating pipe 34 and the fan-shaped nozzle 35 to rotate for 90 degrees through the first driving gear 38, so that the coverage area of the spraying surface of the fan-shaped nozzle 35 in the axial direction of the upper-layer roller 2 is the largest, the second driving motor 51 drives the second driven gear 54 and the water supply pipe 31 to rotate for a certain angle through the second driving gear 53, so that the fan-shaped nozzle 35 rotates downwards and is closer to the upper-layer roller 2, so that the spraying angle of the fan-shaped nozzle 35 and the tangential direction of the excircle spraying point of the upper-layer roller 2 form a certain included angle, and the included angle can be flexibly adjusted according to the actual situation; meanwhile, the opening of the electric regulating valve 45 is regulated to be large, the branch water pipe 44 is not throttled any more, the medium flow of the branch water pipe 44 is increased, the fan-shaped nozzle 35 sprays high-pressure cooling liquid to break through a protective film on the surface of the upper roller 2, and the cooling speed and the cooling effect are improved.

The spray cooling device of the present embodiment is applied to the upper roll 2, and the device can also be used for spray cooling of the lower roll; referring to fig. 6, when the present device is applied to the lower roll, the installation position of the present device is arranged in a mirror image with the spray cooling device corresponding to the upper roll 2, and a protective housing can be installed on the peripheries of the first driving gear 38 and the first driven gear 36 according to actual requirements.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims (6)

1. A spray cooling device for a steel rolling roller comprises a rack (1) and an upper roller (2) arranged on the rack (1), and is characterized by also comprising a spray mechanism (3), a water supply mechanism (4) and a spray angle adjusting mechanism (5); the spraying mechanism (3) is symmetrically arranged on two sides of the upper-layer roller (2), the spraying mechanism (3) comprises a water feeding pipe (31), a spraying pipe (32), a rotary joint (33), a rotary pipe (34), fan-shaped nozzles (35), driven gears, a first driving motor (37) and driving gears, one end of the water feeding pipe (31) is rotatably installed on the rack (1), the spraying pipe (32) is installed on the other end of the water feeding pipe (31), the spraying pipe (32) is parallel to the upper-layer roller (2), the rotary joints (33) which are equidistantly and linearly arranged are installed on the spraying pipe (32), the rotary pipe (34) is installed on the other end of the rotary joint (33), the fan-shaped nozzles (35) are installed on the other end of the rotary pipe (34), the first driven gears (36) are installed on the rotary pipe (34), the first driving gears (37) are meshed and connected with the first driven gears (36), the first driving motor (37) is fixedly connected with the water feeding pipe (31), the output end of the first driving gear (38) is meshed and connected with the first driven gears (36); the water supply mechanism (4) is connected with the water supply pipe (31) and used for supplying water to the water supply pipe (31), and the spraying angle adjusting mechanism (5) is in transmission connection with the water supply pipe (31) and used for driving the water supply pipe (31) to rotate so as to adjust the distance and the angle between the fan-shaped nozzle (35) and the upper roller (2).

2. The spray cooling device for the steel rolling rolls according to claim 1, characterized in that the water supply mechanism (4) comprises a high-pressure pump (41), a water inlet pipe (42), a three-way pipe (43) and two branch water outlet pipes (44), wherein the input end of the high-pressure pump (41) is communicated with the water inlet pipe (42), the output end of the high-pressure pump (41) is communicated with the two branch water outlet pipes (44) through the three-way pipe (43), the branch water outlet pipes (44) correspond to the water supply pipes (31) one by one, and the branch water outlet pipes (44) are communicated with the water supply pipes (31) corresponding to the branch water outlet pipes.

3. Spray cooling device for rolling rolls according to claim 2, characterized in that said branched outlet pipe (44) is equipped with an electric control valve (45).

4. Spray cooling device for steel rolling rolls according to claim 1, characterized in that a mounting bracket (39) is fixed on the water supply pipe (31), and the first driving motor (37) is fixedly mounted on the mounting bracket (39).

5. The spray cooling device for the steel rolling rolls according to claim 1, characterized in that the spray angle adjusting mechanisms (5) are arranged in two and correspond to the spray mechanisms (3) one by one; spraying angle adjustment mechanism (5) include second driving motor (51), worm gear reduction gear (52), second driving gear (53) and second driven gear (54), second driving motor (51) and worm gear reduction gear (52) fixed mounting are in frame (1), second driving motor (51) output and worm gear reduction gear (52) input are connected, worm gear reduction gear (52) output are installed, second driving gear (53), on water supply pipe (31) and be located its and shower (32) parallel's pipeline section and install second driven gear (54), second driven gear (54) are connected with second driving gear (53) meshing.

6. Spray cooling device for rolling rolls according to claim 1, characterized in that the fan-shaped nozzles (35) of the two spray means (3) are staggered.

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