CN112264466A - Hot rolling working roll segmentation cooling device - Google Patents
Hot rolling working roll segmentation cooling device Download PDFInfo
- Publication number
- CN112264466A CN112264466A CN202011299577.9A CN202011299577A CN112264466A CN 112264466 A CN112264466 A CN 112264466A CN 202011299577 A CN202011299577 A CN 202011299577A CN 112264466 A CN112264466 A CN 112264466A
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- cooling
- roller
- connecting pipe
- cooling device
- flow control
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- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention relates to a sectional cooling device for a hot-rolling working roll, which mainly comprises at least one cooling spray nozzle, connecting pipes, a main pipe and a flow control valve, wherein the number of the connecting pipes corresponds to that of the cooling spray nozzles; the tail end of each connecting pipe is connected with a cooling piece, and the other end of each connecting pipe is connected to the main pipe; the cooling nozzles are attached to the working roller and are sequentially arranged along the axis of the working roller; and a flow control valve is arranged at the joint of each connecting pipe and the main pipe. The sectional cooling device for the hot rolling working roll has the advantages of simple and reasonable structure, stable and reliable work, capability of effectively controlling the local thermal convexity of the working roll and improving the quality of a plate strip, and good development space and market prospect.
Description
Technical Field
The invention belongs to the technical field of metal rolling auxiliary equipment, and particularly relates to a sectional cooling device for a hot rolling working roll.
Background
The hot-rolled plate strip is used as an important product of steel enterprises and is widely applied to the fields of aerospace industry, automobile industry, household electrical industry, mechanical manufacturing industry and the like. The shape of the plate is an important external dimension index for measuring the hot rolled plate and strip, and the quality of the plate and strip directly influences the quality of the plate and strip. With the continuous development of modern industrial technology, the thickness of the hot rolled plate strip is thinner and thinner, and the hot rolled plate strip can replace a cold rolled plate strip in more fields, so the plate shape control of the hot rolled plate strip becomes more and more important.
In the rolling process of the plate strip, the plastic deformation of metal can generate heat, the friction between the metal and the roller can also generate heat, and the heat can cause the roller to generate irregular thermal deformation due to different heat dissipation conditions of the roller at different positions in the axial direction, so that the roller generates certain thermal convexity, and finally, the stability and the product quality in the rolling process are greatly influenced. The sectional cooling of the roller is one of important means for controlling the shape of the plate, and can effectively control the local thermal convexity of the roller. The sectional cooling of the roller is to control the thermal deformation of the roller in the rolling process by controlling the flow of cooling liquid in different sections of the roller, so as to achieve the purpose of controlling the plate shape. However, the existing sectional cooling device mostly adopts a mode of spraying cooling liquid by a nozzle to cool, the cooling coverage area is small, accurate control of each cooling spraying point cannot be realized, and the switch valve of the nozzle is controlled in a pulse mode, so that the temperature difference between local parts of the roller is easy to be large, and the quality of the plate strip is directly influenced.
There is a need for a sectional cooling apparatus for a hot rolling work roll which can effectively solve the above problems.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a hot rolling work roll segment cooling apparatus that satisfies one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hot rolling working roll subsection cooling device is characterized by mainly comprising at least two cooling spray nozzles, connecting pipes, a main pipe and flow control valves, wherein the number of the connecting pipes corresponds to that of the cooling spray nozzles; the tail end of each connecting pipe is connected with a cooling piece, and the other end of each connecting pipe is connected to the main pipe; the cooling nozzles are attached to the working roller and are sequentially arranged along the axis of the working roller; and a flow control valve is arranged at the joint of each connecting pipe and the main pipe.
In a preferred embodiment according to the present invention, further comprising a plate profile detector and a control system, said plate profile detector being mounted after the plate rolling position; the control system is connected with the plate type detector and the flow control valve, receives the piezoelectric signals detected by the plate type detector, and calculates and controls the flow control valve to regulate the flow of each connecting pipe according to the piezoelectric signals.
In a preferred embodiment according to the invention, the cooling spray head mainly comprises a roller wiper, a roller wiper base; the roller wiping device is composed of two cuboid wiping plates with a spraying liquid space, the wiping plates are connected and communicated with the connecting pipe through the roller wiping device base, cooling liquid flowing out of the connecting pipe flows through the roller wiping device to form a fluid dynamic liquid layer on the working roller, and the tail ends of the wiping plates are attached to the working roller.
In a preferred embodiment according to the invention, the wiping plate of the roller wiper is inclined tangentially to the outer surface of the working roll so that the hydrodynamic liquid layer cross-section forms a wedge shape curving along the outer surface of the working roll.
In a preferred embodiment according to the present invention, the flow control valve mainly comprises a valve body, a sliding part, an end cover; the valve body is connected with a connecting pipe interface of the main pipe; the sliding component is made of magnetic material and is provided with a conical bulge, and the conical bulge can partially extend into a pipe orifice connected with the valve body and the main pipe and change the blocking amount along with the sliding of the sliding component; the end cover is connected and communicated with the end part of the connecting pipe, and the end cover is internally provided with an electromagnetic coil which can generate magnetic force to push the sliding part.
In a preferred embodiment according to the invention, a sealing ring is arranged between the end cap and the valve body.
In a preferred embodiment according to the invention, the sliding part has a support plate which is adapted to the inner diameter of the valve body, so that the center axis of the sliding part coincides with the center axis of the valve body, and the support plate is provided with a water outlet.
In a preferred embodiment according to the invention the sliding part and the end cap are connected by a spring.
In a preferred embodiment according to the present invention, the plate type detector is a cylindrical detection roller, and the detection roller is provided with at least one group of piezoelectric sensors along the radial direction of the cylinder.
In a preferred embodiment according to the present invention, the control system comprises a signal amplifier, a signal conversion unit, a signal processing computer, a feedback loop; the plate shape detector, the signal amplifier, the signal conversion unit, the signal processor and the feedback loop are sequentially connected with the flow control valve, a piezoelectric signal sent by the plate shape detector is processed by the signal amplifier and the signal conversion unit, then a plate shape signal of each section of the processing plate strip is calculated by the signal processor, and the processed signal controls the flow control valve to regulate the flow through the feedback loop.
Compared with the prior art, the invention has the beneficial effects that:
1) the structure is simple and reasonable, the work is stable and reliable, the local thermal convexity of the working roll can be effectively controlled, the quality of the plate strip is improved, and the development space and the market prospect are good;
2) the cooling coverage area is large;
3) the flow control of the cooling liquid for each cooling point is accurate.
Drawings
FIG. 1 is a schematic view showing the structure of a sectional cooling apparatus for a hot rolling work roll according to example 1 of the present invention;
FIG. 2 is a sectional view of a cooling spray head of a sectional cooling apparatus for a hot rolled work roll according to embodiment 1 of the present invention;
FIG. 3 is a sectional view of a flow control valve of a hot rolling work roll segment cooling apparatus according to embodiment 1 of the present invention;
FIG. 4 is a flowchart of a control system of a segmental cooling device for hot rolling work rolls according to embodiment 1 of the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1: as shown in fig. 1, a sectional cooling device for a hot rolling work roll according to an embodiment of the present invention includes a main body including eight cooling nozzles 1, nozzles 2, a tube support 3, a header pipe 4, a plate type detector 5, and an external control system, wherein the cooling nozzles are uniformly arranged along a horizontal radial cross-sectional edge of a work roll 6 and are attached to the work roll, and each cooling nozzle is connected to the header pipe through a single nozzle 2 in the tube support. The plate shape detector is a detection roller which is attached to the plate belt 7 in front of the working roller to detect the plate shape information. Furthermore, there are support rolls 8, which support the work rolls.
The sectional view of the cooling spray head is shown in fig. 2, and comprises a roller wiper 11 and a roller wiper base 12, wherein the roller wiper base is a metal clamping plate with a hole in the middle, and the metal clamping plate is embedded in the connecting pipe and the hole is matched with the connecting pipe hole. The roller wiping device is fixed in the clamping space of the metal clamping plate, the roller wiping device 11 is composed of two opposite arrangements and a cuboid wiping plate for clamping a spraying liquid space, a certain included angle is formed between the wiping plate of the roller wiping device and the outer surface of the working roller in the direction opposite to the rotation direction of the working roller, the included angle enables cooling liquid to form a fluid dynamic liquid layer 13 which extends along the circumferential bending of the working roller on the working roller when flowing out, the cross section of the fluid dynamic liquid layer is wedge-shaped, the area of the fluid dynamic liquid layer extending along the circumferential direction of the working roller is large, the distribution is uniform, and the effect of continuous stable cooling can be achieved. The wiping plate is wear-resistant, elastic and water-absorbing, and when the working roller rotates, the material characteristics of the roller wiper can wipe off oxide skin on the surface of the working roller while cooling, so that the abrasion on the surface of the working roller is reduced.
The joint of each connecting pipe and the main pipe is provided with a flow control valve shown in the sectional view of fig. 3, the flow control valve comprises a valve body 91, a sliding part 92, an end cover 93 and a spring 94, one end of the valve body is connected with the joint of the main pipe and the connecting pipe, the other end of the valve body hermetically encloses the end cover, and the end cover is connected with and communicated with the connecting pipe. The sliding part is made of magnetic material and is provided with an annular supporting plate 95 matched with the inner diameter of the valve body, so that the central axis of the sliding part is always consistent with that of the valve body, the sliding part is provided with a conical protrusion, the conical protrusion can extend into the pipe orifice connected with the valve body and the header pipe, and when the sliding part slides in the valve body, the conical protrusion can block the pipe orifice to different degrees, so that the flow of cooling liquid is changed. The support plate is also provided with water holes 96, so that the cooling liquid can smoothly flow through the sliding part.
The end cover is connected with the sliding component through a spring, and the spring limits the moving range of the sliding component. An annular sealing ring 97 is arranged at the joint of the end cover and the valve body, an electromagnetic coil 98 is arranged in the end cover and is connected with the control system, and magnetic force with different strengths can be generated under the control of the control system to push the sliding part to move, so that the integral flow of the flow control valve is changed.
As shown in figure 1, the plate type detector is a detection roller provided with a piezoelectric sensor 51, the detection roller is arranged at the rear part of a working roller and is attached to a plate strip, four rows of small holes are uniformly distributed in the circumferential direction of the detection roller at an angle of 90 degrees, and 8 holes are uniformly distributed in each row along the axial direction of the detection roller. The piezoelectric sensor is pre-embedded in the small hole and fixed by a bolt, the bolt applies prestress to the piezoelectric sensor to enable the piezoelectric sensor to be in a linear measurement range, and when the plate strip moves, the detection roller can rotate on the plate strip to enable the piezoelectric sensor to generate different piezoelectric signals along with the change of the plate type.
The control system comprises a signal amplifier, a signal conversion unit, a signal processing computer and a feedback loop, wherein the signal amplifier is connected with the piezoelectric sensor, and the feedback loop is connected with the flow control valve. The flow chart of the control system is shown in fig. 4, the piezoelectric signals detected by the piezoelectric sensors on the detection rolls are processed by the signal amplifier and the signal conversion unit, then the plate type detection signals of each section are calculated by the signal processing computer, and the processed signals control the flow of the cooling liquid in each connecting pipe by controlling the flow control valve through the feedback loop, so that the flow of the cooling liquid contacted with each section of the working roll is controlled, the local thermal crown of each section of the hot rolling working roll is effectively controlled, and the quality of the plate strip is improved.
The two sets of the device are respectively arranged on two sides of the plate strip so as to control the two plate types of the rolled plate strip simultaneously.
Example 2: in another embodiment of the sectional cooling device for the hot rolling working roll according to the present invention, the number of the cooling nozzles is two, and the corresponding number of the connection pipes are connected, and the plate type detector is a detection roll in which four groups of two piezoelectric sensors are uniformly arranged along the circumferential direction of the cylinder, and each group of the detection rolls is sequentially arranged along the radial direction of the cylinder. The above arrangement has a lower detection accuracy but is simpler to manufacture.
Other structures and methods of use can be referred to in example 1.
It should be noted that the above-mentioned only illustrates the preferred embodiments and principles of the present invention, and that those skilled in the art will be able to make modifications to the embodiments based on the idea of the present invention, and that such modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A hot rolling working roll subsection cooling device is characterized by mainly comprising at least two cooling spray nozzles, connecting pipes, a main pipe and flow control valves, wherein the number of the connecting pipes corresponds to that of the cooling spray nozzles; the tail end of each connecting pipe is connected with a cooling piece, and the other end of each connecting pipe is connected to the main pipe; the cooling nozzles are attached to the working roller and are sequentially arranged along the axis of the working roller; and a flow control valve is arranged at the joint of each connecting pipe and the main pipe.
2. The sectional cooling apparatus for a hot rolled work roll according to claim 1, further comprising a slab shape detector installed after the slab rolling position; the control system is connected with the plate type detector and the flow control valve, receives the piezoelectric signals detected by the plate type detector, and calculates and controls the flow control valve to regulate the flow of each connecting pipe according to the piezoelectric signals.
3. A hot rolled work roll staged cooling device as claimed in claim 1, wherein said cooling spray heads consist essentially of a roll wiper, a roll wiper base; the roller wiping device is composed of two cuboid wiping plates with a spraying liquid space, the wiping plates are connected and communicated with the connecting pipe through the roller wiping device base, cooling liquid flowing out of the connecting pipe flows through the roller wiping device to form a fluid dynamic liquid layer on the working roller, and the tail ends of the wiping plates are attached to the working roller.
4. A hot rolled work roll staged cooling device as claimed in claim 3, wherein one of the wipers is angled tangentially to the outer surface of the work roll so that the hydrodynamic fluid layer cross-section forms a wedge shape curving around the outer surface of the work roll.
5. A hot rolled work roll staged cooling device as claimed in claim 1, wherein said flow control valve consists essentially of a valve body, a slide member, an end cap; the valve body is connected with a connecting pipe interface of the main pipe; the sliding component is made of magnetic material and is provided with a conical bulge, and the conical bulge can partially extend into a pipe orifice connected with the valve body and the main pipe and change the blocking amount along with the sliding of the sliding component; the end cover is connected and communicated with the end part of the connecting pipe, and the end cover is internally provided with an electromagnetic coil which can generate magnetic force to push the sliding part.
6. A sectional cooling device for a hot rolled work roll according to claim 5, wherein a seal ring is provided between the end cap and the valve body.
7. A sectional cooling device for a hot rolling work roll according to claim 5, wherein the sliding member has a support plate fitted to an inner diameter of the valve body so that a central axis of the sliding member coincides with a central axis of the valve body, and the support plate is provided with water feed holes.
8. A hot rolled work roll segment cooling apparatus as claimed in claim 5 wherein said slide member and end caps are spring coupled.
9. The sectional cooling device for the hot rolling working roll according to claim 1, wherein the plate shape detector is a cylindrical detection roll, and the detection roll is provided with at least one group of piezoelectric sensors along the radial direction of the cylinder.
10. A hot rolling work roll staged cooling device as claimed in claim 2, wherein said control system comprises a signal amplifier, a signal conversion unit, a signal processing computer, a feedback loop; the plate shape detector, the signal amplifier, the signal conversion unit, the signal processor and the feedback loop are sequentially connected with the flow control valve, a piezoelectric signal sent by the plate shape detector is processed by the signal amplifier and the signal conversion unit, then a plate shape signal of each section of the processing plate strip is calculated by the signal processor, and the processed signal controls the flow control valve to regulate the flow through the feedback loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299577.9A CN112264466A (en) | 2020-11-19 | 2020-11-19 | Hot rolling working roll segmentation cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299577.9A CN112264466A (en) | 2020-11-19 | 2020-11-19 | Hot rolling working roll segmentation cooling device |
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| Publication Number | Publication Date |
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| CN112264466A true CN112264466A (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011299577.9A Pending CN112264466A (en) | 2020-11-19 | 2020-11-19 | Hot rolling working roll segmentation cooling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909315A (en) * | 2021-11-19 | 2022-01-11 | 中国重型机械研究院股份公司 | Rolling mill cooling liquid spraying method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195518A (en) * | 1981-05-28 | 1982-12-01 | Ichikawa Keori Kk | Lubricating device for roll of hot rolling mill |
| JPH0615313A (en) * | 1992-06-30 | 1994-01-25 | Hitachi Ltd | Local spray nozzle device for rolling roll and device and method for local cooling |
| JP3749611B2 (en) * | 1998-01-08 | 2006-03-01 | 新日本製鐵株式会社 | Work roll cooling method for hot rolling mill |
| CN2875633Y (en) * | 2006-02-28 | 2007-03-07 | 宝山钢铁股份有限公司 | Lubricating oil jet device for belt steel rolling |
| CN203459402U (en) * | 2013-07-25 | 2014-03-05 | 北京蒂本斯工程技术有限公司 | Titanium belt composite rolling roller cooling device |
| CN104492818A (en) * | 2014-11-28 | 2015-04-08 | 中冶南方工程技术有限公司 | Sectional roller cooling device and control method |
| CN106825060A (en) * | 2016-12-28 | 2017-06-13 | 中南大学 | The coding method of Heat Working Rolls chilling spray amount control system and spray flux record |
| CN111895161A (en) * | 2020-06-24 | 2020-11-06 | 泗县曰森机械科技有限公司 | Pneumatic control large-flow injection valve for sectional cooling system |
-
2020
- 2020-11-19 CN CN202011299577.9A patent/CN112264466A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195518A (en) * | 1981-05-28 | 1982-12-01 | Ichikawa Keori Kk | Lubricating device for roll of hot rolling mill |
| JPH0615313A (en) * | 1992-06-30 | 1994-01-25 | Hitachi Ltd | Local spray nozzle device for rolling roll and device and method for local cooling |
| JP3749611B2 (en) * | 1998-01-08 | 2006-03-01 | 新日本製鐵株式会社 | Work roll cooling method for hot rolling mill |
| CN2875633Y (en) * | 2006-02-28 | 2007-03-07 | 宝山钢铁股份有限公司 | Lubricating oil jet device for belt steel rolling |
| CN203459402U (en) * | 2013-07-25 | 2014-03-05 | 北京蒂本斯工程技术有限公司 | Titanium belt composite rolling roller cooling device |
| CN104492818A (en) * | 2014-11-28 | 2015-04-08 | 中冶南方工程技术有限公司 | Sectional roller cooling device and control method |
| CN106825060A (en) * | 2016-12-28 | 2017-06-13 | 中南大学 | The coding method of Heat Working Rolls chilling spray amount control system and spray flux record |
| CN111895161A (en) * | 2020-06-24 | 2020-11-06 | 泗县曰森机械科技有限公司 | Pneumatic control large-flow injection valve for sectional cooling system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909315A (en) * | 2021-11-19 | 2022-01-11 | 中国重型机械研究院股份公司 | Rolling mill cooling liquid spraying method |
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Application publication date: 20210126 |