CN113909316B - Shell-shaped cooling liquid injection system - Google Patents
Shell-shaped cooling liquid injection system Download PDFInfo
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- CN113909316B CN113909316B CN202111390725.2A CN202111390725A CN113909316B CN 113909316 B CN113909316 B CN 113909316B CN 202111390725 A CN202111390725 A CN 202111390725A CN 113909316 B CN113909316 B CN 113909316B
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- plate
- cooling liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention provides a shellfish-shaped cooling liquid injection system, which comprises a guide plate frame arranged on a mill housing, and further comprises two guide rollers arranged on the guide plate frame, wherein the axial center lines of the two guide rollers are parallel to each other, the plane where the two axial center lines are positioned is perpendicular to the plane where a strip passing through a gap between the two guide rollers is positioned, a drainage plate is arranged on the roller body of each guide roller, channels for cooling liquid to flow through are arranged in the roller body of each guide roller and the plate body of each drainage plate, and cooling liquid in the guide rollers flows out from the internal channels of the drainage plates and is injected to the contact position of adjacent rollers or the contact position of the strip and a working roller. The arrangement of the shellfish-shaped cooling liquid injection system solves the arrangement problem of the cooling liquid injection system in a narrow space, greatly reduces the injection distance, greatly improves the injection pressure of the cooling liquid by multiple times of pressurization, and thoroughly solves a plurality of problems existing in the current cooling liquid injection system due to the small injection distance and the large injection pressure.
Description
Technical Field
The invention belongs to the field of strip rolling, and particularly relates to a shell-shaped cooling liquid spraying system.
Background
The traditional rolling process and equipment thereof are applicable to the production of middle-low end strips, but cannot meet the rolling process requirements of ultra-precise ultrathin strips, especially the cooling liquid injection system of a rolling mill cannot timely take away heat, which leads to the reduction of product precision due to overheating of roll surfaces and strip surfaces.
In order to roll ultra-precise ultrathin strips, a multi-roller mill is generally adopted to finish plastic processing of metal, and in order to improve the overall rigidity of equipment and the minimum rolling thickness, the diameter of a roller system and the overall size of the mill are as small as possible. However, a great amount of deformation heat is generated in the rolling process of the ultra-precise ultrathin strip, and if the heat is not taken away or cooled by the cooling liquid in time, the surface quality of the strip is easily reduced or the roll surface is easily burnt. However, the arrangement of the coolant injection system is very limited due to the small internal space of the mill. In order not to affect the equipment stiffness and the roll changing operation, the coolant injection system has to be arranged only in the region of the rolling mill remote from the roll surface and the strip.
Disclosure of Invention
The invention aims to provide a shellfish-shaped cooling liquid injection system, which overcomes the technical defects.
In order to solve the technical problems, the invention provides a shell-shaped cooling liquid injection system which comprises a guide plate frame arranged on a mill housing, and further comprises two guide rollers arranged on the guide plate frame, wherein the axial center lines of the two guide rollers are parallel to each other, the plane where the two axial center lines are positioned is perpendicular to the plane where a strip passing through a gap between the two guide rollers is positioned, a drainage plate is arranged on the roller body of each guide roller, channels for cooling liquid to flow through are formed in the roller body of each guide roller and the plate body of each drainage plate, and the cooling liquid in the guide roller flows out along the channels of the drainage plate and is injected to the contact position of an adjacent roller or the contact position of the strip and a working roller.
Further, the two guide rollers are identical in structure and are distributed symmetrically about the plane on which the strip is positioned, the guide rollers are hollow rollers, one port of each hollow roller is closed, the other port of each hollow roller is used as a liquid inlet, the hollow cavity walls of the hollow rollers are uniformly provided with N guide holes at intervals along the axial center line, the axial center lines of all the guide holes are mutually parallel, and the guide holes are communicated with the channels of the guide plates.
Further, the two drainage plates are symmetrically distributed up and down on a plane where the strip is located, wherein the lower plate surface of the drainage plate positioned above the strip is tangential to a guide roller positioned above the strip, N liquid supply channels are formed in the plate body of the drainage plate, each liquid supply channel is correspondingly communicated with each drainage hole, and the inner diameter of each liquid supply channel is gradually reduced along the medium flow direction;
along the medium flow direction, the tail end of the liquid supply channel is a wedge-shaped spray hole, the cooling liquid sprayed from the wedge-shaped spray hole is opposite to the contact position of the strip and the two working rolls, and the width of the strip is covered by the cooling liquid sprayed from all the wedge-shaped spray holes.
Preferably, the diversion holes horizontally extend to form diversion channels which can be inserted into the diversion plates, the diversion channels are communicated with the liquid supply channels, and along the medium flow direction, the cooling liquid enters the guide rollers from the liquid inlet and then sequentially flows through the diversion holes, the diversion channels and the liquid supply channels and then is sprayed out from the wedge-shaped spray holes.
Further, the liquid supply channels are in an open groove shape along the axial direction of the liquid supply channels, the grooves are formed in the surface of the drainage plate, the surface of the drainage plate is covered with a pressing plate, the pressing plate is tightly attached to the surface of the drainage plate and fully covers the open grooves of the liquid supply channels, the tail ends of the pressing plate, corresponding to the liquid supply channels, are provided with fan-shaped spray holes, and cooling liquid sprayed from the fan-shaped spray holes is opposite to the contact position of the adjacent rollers.
Preferably, the liquid supply channels are arranged in the plate body of the drainage plate, the cavity wall of each liquid supply channel is provided with a fan-shaped spray hole, and the cooling liquid sprayed from the fan-shaped spray holes is opposite to the contact position of the adjacent rollers.
Further, the guide roller is parallel to the working roller, one end of the guide roller is a transmission side, the other end of the guide roller is an operation side, the end of the guide roller on the transmission side is inserted into the guide plate frame, the end of the guide roller on the operation side is inserted into the support plate, the support plate is arranged on the guide plate frame, and the guide rollers can rotate around the axis of the support plate frame.
Preferably, the guide roller is fixedly connected with the drainage plate or integrally formed, the drainage plate and the pressing plate are connected through a plurality of groups of rivets, each group of rivets are equidistantly arranged at intervals with each liquid supply channel, and the number and the interval of each group of rivets are the same.
The beneficial effects of the invention are as follows:
The arrangement of the shellfish-shaped cooling liquid injection system solves the arrangement problem of the cooling liquid injection system in a narrow space, greatly reduces the injection distance, greatly improves the injection pressure of the cooling liquid by multiple times of pressurization, and thoroughly solves a plurality of problems existing in the current cooling liquid injection system due to the small injection distance and the large injection pressure.
In order to make the above-mentioned objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of a shell-like coolant injection system with a platen removed.
Fig. 2 is a schematic structural view of a shell-like coolant injection system with a platen.
Fig. 3 is a schematic cross-sectional view of a shell-like cooling liquid injection system (the liquid supply channel is opened on the plate surface of the drainage plate).
Fig. 4 is a schematic cross-sectional view of a shell-like coolant injection system (the liquid supply channel is opened inside the drainage plate).
Reference numerals illustrate:
1. A guide plate frame;
2. a strip;
3. a drainage plate; 301. a liquid supply channel; 302. wedge-shaped injection holes;
4. A guide roller; 401. a deflector aperture; 402. a diversion channel;
5. A work roll;
6. A support plate;
7. a rivet;
8. An intermediate roller;
9. a pressing plate;
10. A fan-shaped jet hole.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
In the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the bell-shaped coolant injection system described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
The present embodiment relates to a scallop-shaped cooling liquid injection system, which comprises a guide plate frame 1 installed in a mill housing, as shown in fig. 1, and further comprises two guide rollers 4 erected on the guide plate frame 1, wherein the axial center lines of the two guide rollers 4 are parallel to each other, the plane where the two axial center lines are located is perpendicular to the plane where a strip 2 passing through a gap between the two guide rollers 4 is located, a drainage plate 3 is installed on the roller body of each guide roller 4, channels for cooling liquid to flow through are formed in the roller body of each guide roller 4 and in the plate body of each drainage plate 3, and the cooling liquid in the guide roller 4 flows out along the channels of the drainage plate 3 and is injected to the contact position of the adjacent rollers or the contact position of the strip 2 and a working roller 5.
The guide rollers 4 are divided into an upper guide roller and a lower guide roller, and function to guide the strip 2 to pass through a gap between the upper guide roller and the lower guide roller, namely, the strip 2 firstly enters the guide plate frame 1 and then continuously passes between the two guide rollers 4 and finally enters the space between the two working rollers 5, and in order to reduce the temperature of the strip 2 exiting from the working rollers 5, a shellfish-shaped cooling liquid injection system can be arranged downstream of the two working rollers 5, namely, the two shellfish-shaped cooling liquid injection systems are symmetrically distributed about the gap between the two working rollers 5.
The drainage plate 3 is divided into an upper drainage plate and a lower drainage plate, the strip 2 coming out from between the two guide rollers 4 can continuously go forward to pass through the upper drainage plate and the lower drainage plate, and referring to fig. 3, the upper guide rollers and the upper drainage plate, and the lower guide rollers and the lower drainage plate are distributed symmetrically about the strip 2 up and down, so that a shellfish-shaped structure is formed, the shellfish-shaped arrangement can limit the shellfish-shaped arrangement to the inner space of the shellfish-shaped cooling liquid injection system when the strip breakage occurs, and thus, the strip head can be prevented from entering the roller contact position, and the occurrence of safety accidents is reduced.
The guide plate frame 1 is mounted on a mill housing, and is preferably connected through a dovetail groove, so that the strip 2 cannot deviate from the original position due to strip impact in the process of threading or cutting.
Referring to fig. 1, the left end face of the guide frame 1 is used as an inlet of the strip 2, which is in a bell-mouth shape (gradually reducing from left to right in fig. 1), and the gap between the two guide rollers 4 is preferably 4mm, and the arrangement can ensure that the raw material can be smoothly threaded through the strip even if the head is warped or buckled, and then the rolling operation is completed, and particularly when the strip is broken, the strip head still remains in the gap of 4mm and cannot be wound on a roller.
The working principle of the shellfish-like coolant injection system of the present embodiment is as follows:
The strip 2 enters the guide plate frame 1 from the inlet of the left end face of the guide plate frame 1, and continuously moves between the two guide rollers 4 and then between the two guide plates 3, as shown in fig. 3 or fig. 4, when the strip 2 approaches the working rollers 5, the channels of the guide plates 3 spray cooling liquid, the cooling liquid sprays between the two working rollers 5 to reduce the temperature of the strip 2, and/or sprays at the contact position of the adjacent rollers (the working rollers 5 and an intermediate roller 8 are shown in fig. 3 or fig. 4), and finally enters the two working rollers 5 to be extruded.
The bell-shaped cooling liquid injection system can be applied to any rolling mill, is particularly suitable for twenty-high rolling mills and ultra-precise ultra-thin strip rolling processes, greatly saves huge space required by nozzle installation because the whole system does not adopt nozzles, and realizes the injection effect of covering the whole strip surface beyond the nozzles through high-pressure low-distance injection.
Second embodiment
The present embodiment relates to a scallop-shaped cooling liquid injection system, which comprises a guide plate frame 1 installed in a mill housing, as shown in fig. 1, and further comprises two guide rollers 4 erected on the guide plate frame 1, wherein the axial center lines of the two guide rollers 4 are parallel to each other, the plane where the two axial center lines are located is perpendicular to the plane where a strip 2 passing through a gap between the two guide rollers 4 is located, a drainage plate 3 is installed on the roller body of each guide roller 4, channels for cooling liquid to flow through are formed in the roller body of each guide roller 4 and in the plate body of each drainage plate 3, and the cooling liquid in the guide roller 4 flows out along the channels of the drainage plate 3 and is injected to the contact position of the adjacent rollers or the contact position of the strip 2 and a working roller 5.
Referring to fig. 3 or 4, the two guide rollers 4 have the same structure and are distributed symmetrically about the plane on which the strip 2 is located, the guide rollers 4 are hollow rollers, one port of each hollow roller is closed, the other port is used as a liquid inlet, N guide holes 401 are uniformly spaced along the axial center line of the hollow cavity wall of each hollow roller, the axial center lines of all the guide holes 401 are parallel to each other, and the guide holes 401 are all communicated with the channels of the guide plate 3.
Arrows in fig. 3 and 4 represent the flow direction of the cooling liquid.
The hollow inner diameter of the guide roller 4 is larger than the inner diameter of the guide hole 401, for example, the hollow inner diameter of the guide roller 4 is 16mm, the inner diameter of the guide hole 401 is 5mm, and one-time pressurization of the cooling liquid can be completed in the process that the cooling liquid flows from the guide roller 4 with large diameter (16 mm) to the guide hole 401 with small diameter (5 mm).
In order to ensure that the flow rate, flow rate and pressure of the cooling liquid entering the upper guide roller and the lower guide roller are equal, the cooling liquid exiting from the total liquid inlet pipe is distributed to the upper guide roller and the lower guide roller evenly in two paths, and similarly, in order to ensure equal flow distribution and ensure cooling spraying effect, all the flow guide holes 401 are preferably distributed at uniform intervals.
As shown in fig. 3, two drainage plates 3 are symmetrically arranged up and down on a plane where the strip 2 is located, wherein the lower plate surface of the drainage plate 3 above the strip 2 is tangential to a guide roller 4 above the strip 2, N liquid supply channels 301 are formed in the plate body of the drainage plate 3, each liquid supply channel 301 is correspondingly communicated with each drainage hole 401, and the inner diameter of each liquid supply channel 301 is gradually reduced along the medium flow direction;
along the flow direction of the medium, the tail end of the liquid supply channel 301 is provided with a wedge-shaped spray hole 302, the cooling liquid sprayed from the wedge-shaped spray hole 302 is opposite to the contact position of the strip 2 and the two working rolls 5, and all the cooling liquid sprayed from the wedge-shaped spray hole 302 covers the width of the strip 2.
The wedge-shaped spray holes 302 are used to cool the gap between the strip and the rolls.
The diameter of the beginning end of the liquid supply channel 301 is 5mm, the diameter of the end is 1mm, the diameters of the beginning end and the end gradually shrink, namely the sectional area of the end is smaller than that of the beginning end, and the cooling liquid is secondarily pressurized in the process of entering the liquid supply channel 301 from the flow guide hole 401.
The cooling liquid after the secondary pressurization is sprayed to the contact position (to-be-cooled area) of the strip 2 and the working roll 5 at a high speed by the wedge-shaped spray hole 302, and the cooling liquid is sprayed at a high speed and rapidly covers the full width under the action of the secondary pressurization because the wedge-shaped spray hole 302 is closer to the to-be-cooled area.
In order to precisely spray the material to be cooled to the region, the wedge-shaped spray holes 302 should be opposite to the contact position of the strip 2 and the working roll 5, as shown in fig. 3 or fig. 4, that is, the included angle of the upper and lower wedge-shaped spray holes 302 forming an acute angle with the line connecting the region to be cooled is the optimal arrangement, and can also be adjusted automatically according to the roll diameter of the working roll 5.
In this embodiment, the liquid supply channel 301 is preferably a duct, but may have a circular cross section, a rectangular cross section, or other shapes, without limitation.
Referring to fig. 3 or 4, the diversion holes 401 horizontally extend to form diversion channels 402 which can be inserted into the diversion plate 3, the diversion channels 402 are communicated with the liquid supply channels 301, and along the medium flow direction, the cooling liquid enters the guide roller 4 from the liquid inlet, and then flows through the diversion holes 401, the diversion channels 402 and the liquid supply channels 301 in sequence and is sprayed out from the wedge-shaped spray holes 302.
The drainage plate 3 has two structures, which will be described in detail below:
Structure one: referring to fig. 1 and 3, the liquid supply channel 301 is in an open groove shape along the axial direction, the groove is formed on the plate surface of the drainage plate 3, the surface of the drainage plate 3 is covered with the pressing plate 9, the pressing plate 9 is tightly attached to the surface of the drainage plate 3 and fully covers the open groove of the liquid supply channel 301, the tail end of the pressing plate 9 corresponding to each liquid supply channel 301 is provided with a fan-shaped spray hole 10, the cooling liquid sprayed from the fan-shaped spray holes 10 is opposite to the contact position of the adjacent rollers, and the wedge-shaped spray hole 302 shown in fig. 3 is formed between the lower plate surface at the tail end of the pressing plate 9 and the tail end cavity wall of the liquid supply channel 301.
In order to avoid vibration caused when spraying the cooling liquid and ensure the stability of the system, the drainage plate 3 and the pressing plate 9 are connected by a plurality of sets of rivets 7 in the embodiment, each set of rivets 7 is equidistantly spaced from each liquid supply channel 301, and the number and the spacing of each set of rivets 7 are the same.
And (2) a structure II: referring to fig. 4, the liquid supply channels 301 are formed inside the plate body of the drainage plate 3, the cavity wall of each liquid supply channel 301 is formed with a fan-shaped spray hole 10, and the cooling liquid sprayed from the fan-shaped spray holes 10 is opposite to the contact position of the adjacent rollers, that is to say, the drainage plate 3 is of an integral structure, the drainage plate 3 and the guide roller 4 can be integrally formed, and the tail end of each liquid supply channel 301 is provided with a wedge-shaped spray hole 302.
The two structures can be selected according to the requirement, namely the split type drainage plate 3 and the pressing plate 9 can be selected, and the integral type drainage plate 3 can also be selected.
In fig. 3 or fig. 4, the cooling liquid sprayed from the fan-shaped spray hole 10 is opposite to the contact position of the two intermediate rolls 8 and the working roll 5, if the thickness of the tail end of the flow guiding plate 3 is 1mm, the axial width of the fan-shaped spray hole 10 is 5mm and forms an included angle of 70 degrees with the center of the width, and the fan-shaped spray hole 10 is slightly far away from the part to be cooled (the contact position of the intermediate roll 8 and the working roll 5), so that the cooling liquid can be sprayed out in a fan-shaped high pressure and can be rapidly covered to the full bandwidth by adopting the included angle of 70 degrees.
The fan-shaped spray holes 10 have a cross-sectional thickness of 1.5mm and are 30 deg. from the horizontal to spray the cooling liquid to the contact point of the work roll 5 and a middle roll 8, and the distance between the fan-shaped spray holes 10 and the portion to be cooled (the contact point of the strip 2 and the work roll 5) is further than that of the wedge-shaped spray holes 302, so that the hole thickness is larger to facilitate more spraying of the cooling liquid.
The guide roller 4 is parallel to the working roller 5, one end of the two rollers is a transmission side, the other end of the two rollers is an operation side, wherein the end part of the guide roller 4 on the transmission side is inserted into the guide plate frame 1, the end part of the guide roller 4 on the operation side is inserted into the support plate 6, the support plate 6 is arranged on the guide plate frame 1, and the two guide rollers 4 can rotate around the axis of the support plate.
The driving sides of the two guide rollers 4 are inserted into the guide plate frame 1 to facilitate equal split flow of the cooling liquid, the operation sides of the two guide rollers 4 are inserted into the support plate 6, the support plate 6 is connected with the guide plate frame 1, and the two guide rollers 4 and the drainage plates 3 thereof can rotate about + -2 degrees along the axes of the guide rollers 4 and the support plate 6 because the two guide rollers 4 are hinged to the guide plate frame 1 and the support plate 6, the hinged arrangement can realize fine adjustment of the injection angle of the cooling liquid, and therefore, the cooling effect can be ensured by adjusting the injection angle of the cooling liquid when the diameter of the roller changes.
Due to the limitation of the size of the scallop-shaped layout in the thickness direction, the guide roller 4 and the drainage plate 3 can be fixedly connected (such as welded), or can be connected in other ways, as long as the sealing is ensured when the coolant flows through the guide roller 4 and the drainage plate 3, the drainage plate 3 and the pressing plate 9 are connected through a plurality of groups of rivets 7, each group of rivets 7 is equidistantly and at intervals arranged with each liquid supply channel 301, and the number and the interval of each group of rivets 7 are the same. This not only makes the drainage plate 3 fully adhere to the guide roller 4 to prevent leakage of the adhering surface, but also makes the cooling liquid after the second pressurization of the wedge-shaped liquid supply channel 301 quickly spray and cover the whole area.
For example, the fan-shaped spray holes 10 of the flow guiding plate 3 are 13 in total along the axial direction, the distances between every two adjacent holes are 20mm, and the fan-shaped spray holes 10 correspond to the axial positions of the flow guiding holes 401, the flow guiding channels 402, the liquid supply channels 301 of the flow guiding channels 402 and the wedge-shaped spray holes 302, so that the cooling liquid can be rapidly and smoothly split on the same cross section.
The working principle of the shellfish-shaped cooling liquid injection system provided in this embodiment is as follows:
When the cooling liquid enters the guide hole 401 from the hollow cavity of the guide roller 4, the primary pressurization is finished due to the reduced diameter, the cooling liquid enters the liquid supply channel 301 from the guide hole 401 and the guide channel 402, the secondary pressurization is finished due to the reduced section size, the cooling liquid subjected to the secondary pressurization is sprayed to the contact area between the strip 2 and the working roller 5 by the wedge-shaped spray hole 302 in a high-pressure and high-speed state, and/or is sprayed to the contact area between the working roller 5 and the middle roller 8 by the fan-shaped spray hole 10 in a high-pressure and high-speed state, the deformation heat generated by the two areas is the largest, the linear speed of related parts is higher, and therefore, the area with the largest cooling liquid is required in the whole system, and the system directly cools the area; with the high-speed operation of rolling, the cooling liquid rapidly and indirectly cools other areas in the rolling mill through rotation, splashing and other modes.
Due to the bell-shaped arrangement, the minimum spray distance between the wedge-shaped spray holes 302 and the strip 2 at the contact with the work rolls 5 is 5mm, the spray force of which can be up to 70N, and the minimum spray distance between the fan-shaped spray holes 10 and an intermediate roll 8 at the contact with the work rolls 5 is 7mm, the spray force of which can be up to 66N. The combined action of the small spraying distance and the large spraying force is beneficial to timely taking away the deformation heat to realize direct cooling and also beneficial to rapid splashing of the cooling liquid to realize indirect cooling, and the deformation heat in the rolling process is always maintained in a reasonable state by the direct cooling and the indirect cooling.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. A shellfish-shaped cooling liquid injection system is suitable for ultra-precise ultrathin strip rolling, and is characterized in that: the guide plate rack (1) is arranged on a mill housing, the guide plate rack (1) further comprises two guide rollers (4) which are arranged on the guide plate rack (1), the axial center lines of the two guide rollers (4) are parallel to each other, the plane where the two axial center lines are located is perpendicular to the plane where the strip (2) passing through a gap between the two guide rollers (4) is located, a drainage plate (3) is arranged on the roller body of each guide roller (4), channels for cooling liquid to flow through are formed in the roller body of each guide roller (4) and the plate body of each drainage plate (3), and the cooling liquid in the guide roller (4) flows out along the channels of the drainage plate (3) and is sprayed to the contact part of an adjacent intermediate roller (8) and the working roller (5) and the contact part of the strip (2) and the working roller (5);
The drainage plates (3) are divided into an upper drainage plate and a lower drainage plate, and the strip (2) coming out from between the two guide rollers (4) can continuously pass through the space between the upper drainage plate and the lower drainage plate, namely, the upper guide rollers and the upper drainage plate, the lower guide rollers and the lower drainage plate are distributed up and down symmetrically about the strip (2), so that a shellfish-shaped structure is formed, and the shellfish-shaped arrangement can limit the strip to the inner space of a shellfish-shaped cooling liquid injection system when the strip breakage occurs, so that the strip head is prevented from entering the roller contact position;
The guide roller (4) is parallel to the working roller (5), one end of the two rollers is a transmission side, the other end of the two rollers is an operation side, wherein the end of the guide roller (4) positioned on the transmission side is inserted into the guide plate frame (1), the end of the guide roller (4) positioned on the operation side is inserted into the support plate (6), and the support plate (6) is arranged on the guide plate frame (1);
The guide plate frame (1) is arranged on a mill housing through a dovetail groove, so that the strip (2) cannot deviate from the original position due to strip impact in the process of threading or cutting, the left end face of the guide plate frame (1) is used as an inlet of the strip (2) and is in a horn mouth shape, and a gap between two guide rollers (4) is 4mm;
N liquid supply channels (301) are formed in the plate body of the drainage plate (3), the tail ends of the liquid supply channels (301) are wedge-shaped spray holes (302) along the medium flow direction, cooling liquid sprayed from the wedge-shaped spray holes (302) is opposite to the contact position of the strip (2) and the two working rolls (5), and the width of the strip (2) is covered by the cooling liquid sprayed from all the wedge-shaped spray holes (302);
The liquid supply channels (301) are arranged in the plate body of the drainage plate (3), the cavity wall of each liquid supply channel (301) is provided with a fan-shaped spray hole (10), and the cooling liquid sprayed from the fan-shaped spray holes (10) is opposite to the contact position between the adjacent intermediate roller (8) and the working roller (5);
the section thickness of the fan-shaped spray hole (10) is 1.5mm and forms 30 degrees with the horizontal direction to spray the cooling liquid to the contact position of the roller surfaces of the working roller (5) and an intermediate roller (8);
Due to the bell-shaped arrangement, the minimum spraying distance between the wedge-shaped spraying hole (302) and the contact position of the strip (2) and the working roller (5) is 5mm, the spraying force can reach 70N, the minimum spraying distance between the fan-shaped spraying hole (10) and the contact position of the middle roller (8) and the working roller (5) is 7mm, and the spraying force can reach 66N; the combined action of the small spraying distance and the large spraying force is beneficial to timely taking away the deformation heat to realize direct cooling and rapid splashing of the cooling liquid to realize indirect cooling, and the deformation heat in the rolling process is always maintained in a reasonable state by the direct cooling and the indirect cooling;
The two guide rollers (4) have the same structure and are distributed symmetrically up and down on the plane where the strip (2) is located, the guide rollers (4) are hollow rollers, one port of each hollow roller is closed, the other port is used as a liquid inlet, N guide holes (401) are uniformly arranged on the hollow cavity wall of each hollow roller at intervals along the axial center line, the axial center lines of all the guide holes (401) are parallel to each other, and the guide holes (401) are communicated with the channels of the guide plates (3);
The two flow guiding plates (3) are symmetrically distributed up and down on the plane of the strip (2), wherein the lower plate surface of the flow guiding plate (3) positioned above the strip (2) is tangential to a guide roller (4) positioned above the strip (2), each liquid supply channel (301) is correspondingly communicated with each flow guiding hole (401), and the inner diameter of the liquid supply channel (301) is gradually reduced along the medium flow direction;
The flow guide holes (401) horizontally extend to form flow guide channels (402) which can be inserted into the drainage plates (3), the flow guide channels (402) are communicated with the liquid supply channels (301), and along the flow direction of media, cooling liquid enters the guide rollers (4) from the liquid inlet and then sequentially flows through the flow guide holes (401), the flow guide channels (402) and the liquid supply channels (301) and then is sprayed out from the wedge-shaped spray holes (302);
an included angle of an acute angle is formed between the upper wedge-shaped injection hole (302) and the connecting line of the region to be cooled;
The hollow inner diameter of the guide roller (4) is larger than the inner diameter of the guide hole (401), and the primary pressurization of the cooling liquid is completed in the process that the cooling liquid flows from the large-diameter guide roller (4) to the small-diameter guide hole (401);
the cooling liquid is secondarily pressurized in the process of entering the liquid supply channel (301) through the diversion hole (401);
the liquid supply channels (301) are in an open groove shape along the axial direction of the liquid supply channels, the grooves are formed in the plate surface of the drainage plate (3), the surface of the drainage plate (3) is covered with the pressing plate (9), the pressing plate (9) is tightly attached to the surface of the drainage plate (3) and fully covers the open grooves of the liquid supply channels (301), the tail ends of the pressing plate (9) corresponding to the liquid supply channels (301) are provided with fan-shaped spray holes (10), and cooling liquid sprayed from the fan-shaped spray holes (10) is opposite to the contact position of an adjacent intermediate roller (8) and the working roller (5).
2. The shell-like coolant ejection system of claim 1, wherein: both guide rollers (4) are rotatable about their own axes.
3. The shell-like coolant ejection system of claim 1, wherein: the guide roller (4) is fixedly connected with the drainage plate (3) or integrally formed, the drainage plate (3) and the pressing plate (9) are connected through a plurality of groups of rivets (7), each group of rivets (7) is arranged at equal intervals with each liquid supply channel (301), and the number and the interval of each group of rivets (7) are the same.
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| CN113909315B (en) * | 2021-11-19 | 2024-11-12 | 中国重型机械研究院股份公司 | A method for spraying cooling liquid of rolling mill |
| CN114918251B (en) * | 2022-04-29 | 2025-06-13 | 中冶南方工程技术有限公司 | Spray beam and maintenance method thereof, twenty-high rolling mill and working method thereof |
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