CN112474839A - Cavitation water descaling machine and descaling method - Google Patents
Cavitation water descaling machine and descaling method Download PDFInfo
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- CN112474839A CN112474839A CN202011269389.1A CN202011269389A CN112474839A CN 112474839 A CN112474839 A CN 112474839A CN 202011269389 A CN202011269389 A CN 202011269389A CN 112474839 A CN112474839 A CN 112474839A
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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
- B21B45/04—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 de-scaling, e.g. by brushing
- B21B45/08—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 de-scaling, e.g. by brushing hydraulically
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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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Abstract
The invention aims to solve the problems of the existing high-pressure water descaling equipment, provides a cavitation water descaling machine and a descaling method, and belongs to the technical field of hot continuous rolling plate strip steel production. The invention discloses a cavitation water dephosphorization machine, which comprises: the descaling device comprises a descaling machine box and a descaling water collecting injection pipe arranged in the descaling machine box; the descaling machine box comprises an upper machine cover, a billet conveying roller and a lower water collecting filter box; the descaling water collecting injection pipe is divided into an upper surface descaling water collecting injection pipe and a lower surface descaling water collecting injection pipe, and the descaling water collecting injection pipe consists of a water collecting injection pipe outer cavity, a high-pressure water collecting pipe sleeved in the water collecting injection pipe outer cavity, and a low-pressure water collecting pipe arranged between the water collecting injection pipe outer cavity and the high-pressure water collecting pipe. The invention provides a descaling device and a descaling method for generating cavitation water in a non-submerged state, which can improve the descaling capability and effect in the technical process, realize on-line automatic adjustment operation and effectively overcome the defects of the existing device.
Description
Technical Field
The invention belongs to the technical field of hot continuous rolling plate strip steel production, and particularly relates to a cavitation water descaling machine and a descaling method.
Background
In the hot rolling production process, the strip steel cannot be immediately rolled after coming out of the heating furnace because a layer of iron scale is generated on the surface of the plate blank after being heated at high temperature. If the oxide scale is not removed, the service life of the roller can be reduced, and the oxide scale is easily pressed into the surface of the strip steel during rolling, so that the quality of the strip steel is affected. At present, the scale of the layer of the oxide scale is removed by adopting common high-pressure water.
The traditional high-pressure water descaling has the following problems: the descaling is uneven, the requirement on the surface descaling effect of some special steel cannot be met, and the steel plate surface containing silicon elements and the like is sticky and difficult to remove. The traditional high-pressure water descaling method has the advantages that the water pressure is 15-18Mpa, the cavitation water can reach more than 50Mpa, and the problems that the scale cannot be completely removed after one time of heating furnace, the scale remains before finish rolling, the plate quality is influenced, the lower descaling efficiency is low and the effect is poor due to the fact that the spray angle of a nozzle cannot be in the optimal angle due to the thickness change of a plate blank can be solved. However, the prior art has not completely solved this problem. The Chinese patent with the publication number of CN106424171B only relates to the adjustment of the size of a water gap, the adjustment needs manual control by people, and in addition, the adjustment of a spraying angle is not related, so that the method has obvious limitation relative to the automatic production; the application publication number is CN106903176A, and two water pressure descaling devices are designed, and different water pressures can be adopted according to different requirements. However, none of these devices utilize cavitating water and are unable to achieve higher pressures.
The cavitation water jet is a high-efficiency high-pressure water jet, takes water as a medium, utilizes the principle of hydraulic mechanical 'cavitation', artificially generates a plurality of cavitation bubbles in the water jet flow stream, and utilizes the strong impact force generated by cavitation bubble breakage to enhance the action effect of the jet flow. The object is washed by the cavitation water, and high temperature, high pressure and micro jet flow are generated when cavitation bubbles are in burst and extinguish when contacting with the object, so that impurities on the surface of the object are quickly destroyed, and the aim of cleaning is fulfilled. The device has the characteristics of environmental protection, energy conservation, high efficiency, no corrosion, simple device and easy operation.
Disclosure of Invention
The invention aims to solve the problems of the existing high-pressure water descaling equipment and provides a cavitation water descaling machine and a descaling method. The invention provides a descaling device and a descaling method for generating cavitation water in a non-submerged state, which can improve the capacity and effect of descaling operation in the process, realize online automatic adjustment operation and effectively overcome the defects of the conventional device.
One of the technical schemes of the invention is that the cavitation water descaler comprises: the descaling device comprises a descaling machine box and a descaling water collecting injection pipe arranged in the descaling machine box;
the descaling machine box comprises an upper machine cover, a steel billet conveying roller positioned in the middle of the machine box and a lower water collecting filter box positioned at the lower part of the machine box; the descaling water collecting injection pipe is divided into an upper surface descaling water collecting injection pipe and a lower surface descaling water collecting injection pipe, the upper surface descaling water collecting injection pipe is fixed above the billet conveying roller way through a support, and the lower surface descaling water collecting injection pipe is fixed below the billet conveying roller way through a support;
the descaling water collecting injection pipe consists of a water collecting injection pipe outer cavity, a high-pressure water collecting pipe sleeved in the water collecting injection pipe outer cavity and a low-pressure water collecting pipe arranged between the water collecting injection pipe outer cavity and the high-pressure water collecting pipe; the outer cavity of the water collecting and spraying pipe is a cylinder, the cavity wall is provided with a plurality of rows of cavitation water nozzles and a low-pressure water inlet pipe, and one end of the outer cavity of the water collecting and spraying pipe is provided with a high-pressure water inlet pipe connected with a high-pressure water collecting pipe; the high-pressure water collecting pipe is a cylinder, a plurality of rows of high-pressure water nozzles are arranged on the pipe wall, each high-pressure water nozzle is sleeved with one water jet nozzle, the high-pressure water nozzles and the water jet nozzles are coaxial, the distance between the circle centers of the high-pressure water nozzles adjacent to each other in the horizontal direction is the same as that between the circle centers of the cavitation water nozzles adjacent to each other in the horizontal direction, and the intersection point of the connecting line between the circle centers of the high-pressure water nozzles adjacent to each other in the vertical direction is the same; the low pressure water collector pipe is axially parallel to the outer cavity of the water collecting injection pipe, the water inlet end of the low pressure water collector pipe is connected with the low pressure water inlet pipe, a plurality of low pressure water hoses are uniformly distributed on the pipe wall of the low pressure water collector pipe, and the tail end of each low pressure water hose is opened on the side wall of one water jetting nozzle.
Further, in the cavitation water descaler, the top of the lower water collecting filter box is provided with a filter screen for collecting impurities washed by the descaling water collecting injection pipe; one side of the lower water collecting and filtering box is provided with a drainage pipeline which is externally connected with a circulating filter tank, so that the full cyclic utilization of water resources is realized.
Furthermore, the diameter of the nozzle opening of the water jet nozzle of the cavitation water descaler is 1-3mm larger than that of the nozzle opening of the high-pressure water nozzle.
Further, in the cavitation water descaler, the inner surface of the water injection nozzle is a paraboloid.
Furthermore, the included angle between the axis of the water jet nozzle and the vertical direction of the cavitation water descaler is 0-45 degrees.
Further, in the cavitation water descaler, a high-pressure water inlet pipe is connected with an external source pressure pump station, and a pressure accumulator is arranged between the pump station and the water inlet pipe; the low-pressure water inlet pipe is externally connected with a low-pressure pump station.
Furthermore, the cavitation water descaler is also provided with an automatic cavitation water spraying angle adjusting device which comprises a corner indexing positioning gear, a corner motorized sprocket and an electromagnetic corner positioning stop brake, wherein the corner indexing positioning gear is arranged on the outer side of the other end of the outer cavity of the water collecting spraying pipe and is connected with the high-pressure water collecting pipe through a fixed shaft; the electromagnetic corner positioning brake consists of a band-type brake spring, an electromagnet and an electromagnetic brake, wherein the electromagnetic brake is provided with gear teeth capable of being meshed with the corner indexing positioning gear, and the electromagnet is connected with the electromagnetic brake through the band-type brake spring; the electromagnet is communicated with an external circuit; the corner motorized sprocket is connected with a chain, and the chain is powered by a motor.
The method for descaling the cavitation water by adopting the cavitation water descaler comprises the following steps:
1) the electromagnet is electrified, the electromagnetic brake gate is separated from the corner indexing positioning gear, the motor is started to enable the corner motorized sprocket to rotate, and the water injection nozzle is adjusted to a proper angle;
2) starting a high-pressure water switch and a low-pressure water switch, and forming a ring column type water cavity between the inner wall of the water jetting nozzle and the outer wall of the high-pressure water jetting nozzle, wherein the water cavity is filled with low-pressure water from a low-pressure water hose; the high-pressure water collecting pipe cavity is filled with high-pressure water, the high-pressure water meets the low-pressure water after passing through the high-pressure water nozzle, so that the periphery of the high-pressure jet is filled with the low-pressure water, and the high-pressure jet meeting the low-pressure water generates cavitation water jet through the water jet nozzle;
3) and opening the billet conveying roller, conveying the billets into a descaling cabinet for descaling, and spraying cavitation water jet on the upper and lower surfaces of the billets by the water jet nozzle for descaling.
Compared with the prior art, the invention has the advantages that:
1. the descaling machine provided by the invention utilizes cavitation water to descale, the water pressure of the cavitation water can reach more than 50Mpa, and the problems that the scale cannot be completely removed after the heating furnace, the scale remains before finish rolling, and the quality of the plate is influenced can be solved.
2. The descaling machine provided by the invention is provided with the cavitation water injection angle adjusting device, and can solve the problems of low descaling efficiency, poor effect and the like caused by the fact that the nozzle injection angle cannot be at the optimal angle due to the thickness change of a plate blank of the descaling device.
Drawings
FIG. 1 is a schematic left view of a scale removing apparatus for a sterilized water in example 1;
FIG. 2 is an external schematic view of a descaling header pipe provided with an automatic cavitation water jet angle adjusting device in embodiment 1;
fig. 3 is a schematic structural view of the descaling water collecting injection pipe provided with the cavitation water injection angle automatic adjusting device in the embodiment 1;
FIG. 4 is a schematic sectional view showing the structure of the scale removing water collecting spray pipe in example 1;
FIG. 5 is a schematic view showing the positional relationship between the inner wall of the water jet nozzle and the high pressure water nozzle in example 1;
fig. 6 shows an automatic adjustment device for the injection angle of the atomized water in example 1.
The device comprises an upper hood 1, an upper surface descaling water collecting injection pipe 2, an upper surface descaling water collecting injection pipe 3, a plate blank 4, a drainage pipeline 5, a lower water collecting filter box 6, a lower surface descaling water collecting injection pipe 7, a billet conveying roller 8, a low-pressure water collecting pipe 9, a high-pressure water nozzle 10, a water injection nozzle 11, a high-pressure water collecting pipe 12, a low-pressure water inlet pipe 13, a corner indexing positioning gear 14, a corner motorized sprocket 15, a cavitation water nozzle 16, a high-pressure water inlet pipe 17, a band-type brake spring 18, an electromagnet 19, an electromagnetic locking brake 20, a chain 21, a water collecting injection pipe outer cavity 22, a low-pressure water hose 23 and a filter screen.
Detailed Description
Example 1
A cavitated water descaler comprising: the descaling device comprises a descaling machine box and a descaling water collecting injection pipe arranged in the descaling machine box;
the descaling machine box comprises an upper machine cover 1, a steel billet conveying roller 7 positioned in the middle of the machine box and a lower water-collecting filter box 5 positioned at the lower part of the machine box, wherein a steel billet 4 passes through the steel billet conveying roller 7, and a filter screen 23 is arranged at the top of the lower water-collecting filter box and used for collecting impurities washed by a descaling water-collecting jet pipe; one side of the lower water collecting and filtering box is provided with a drainage pipeline 4 which is externally connected with a circulating filter tank, so that the water resource is fully recycled; the descaling water collecting injection pipe is divided into an upper surface descaling water collecting injection pipe 2 and a lower surface descaling water collecting injection pipe 6, the upper surface descaling water collecting injection pipe is fixed above the steel billet conveying roller through a bracket, and the lower surface descaling water collecting injection pipe is fixed below the steel billet conveying roller through a bracket;
the descaling water collecting injection pipe consists of a water collecting injection pipe outer cavity 21, a high-pressure water collecting pipe 11 sleeved in the water collecting injection pipe outer cavity, a low-pressure water collecting pipe 8 arranged between the water collecting injection pipe outer cavity and the high-pressure water collecting pipe, and an automatic cavitation water injection angle adjusting device; the outer cavity 21 of the water collecting injection pipe is a cylinder, a plurality of rows of cavitation water nozzles 15 and a low-pressure water inlet pipe 12 are arranged on the cavity wall, the low-pressure water inlet pipe is externally connected with a low-pressure pump station, one end of the outer cavity of the water collecting injection pipe is provided with a high-pressure water inlet pipe 16 connected with a high-pressure water collecting pipe, the high-pressure water inlet pipe is connected with an external pressure pump station, and a pressure accumulator is arranged between the pump station and the water inlet pipe and used for eliminating pressure pulsation and continuously and stably; the high-pressure water collecting pipe 11 is a cylinder, a plurality of rows of high-pressure water nozzles 9 are arranged on the pipe wall, each high-pressure water nozzle is sleeved with a water jet nozzle 10, the inner surface of each water jet nozzle is a paraboloid, the high-pressure water nozzles and the water jet nozzles are coaxial, the diameter of the nozzle opening of each water jet nozzle is 1-3mm larger than that of the high-pressure water nozzle, the distance between the circle centers of the adjacent high-pressure water nozzles in the horizontal direction is the same as that of the adjacent cavitation water nozzles in the horizontal direction, and the intersection point of the connecting line between the circle centers of the adjacent high-pressure water nozzles in the vertical direction is the same as; the low-pressure water collecting pipe 8 is axially parallel to the outer cavity of the water collecting injection pipe, the water inlet end of the low-pressure water collecting pipe is connected with a low-pressure water inlet pipe, a plurality of low-pressure water hoses 22 are uniformly distributed on the pipe wall of the low-pressure water collecting pipe, and the tail end of each low-pressure water hose is opened on the side wall of a corresponding water jetting nozzle; the cavitation water injection angle automatic regulating device comprises a corner indexing positioning gear 13, a corner motorized sprocket 14 and an electromagnetic corner positioning stop brake, wherein the corner indexing positioning gear is arranged on the outer side of the other end of the outer cavity of the water collecting injection pipe and is connected with the high-pressure water collecting pipe through a fixed shaft; the corner indexing positioning gear is coaxial with the corner motorized sprocket, and when the corner motorized sprocket rotates, the corner indexing positioning gear also rotates along with the corner motorized sprocket; the electromagnetic corner positioning brake consists of a brake spring 17, an electromagnet 18 and an electromagnetic brake 19, wherein gear teeth capable of being meshed with the corner indexing positioning gear are arranged on the electromagnetic brake, and the electromagnet is connected with the electromagnetic brake through the brake spring; the electromagnet is communicated with an external circuit; the corner motorized sprockets are connected to chains 20, each of which is powered by the same motor.
Example 2
A cavitation water descaling method adopts the cavitation water descaling machine of embodiment 1, and comprises the following steps:
1) the electromagnet is electrified, the electromagnetic brake gate is separated from the corner indexing positioning gear, the motor is started to enable the corner motorized sprocket to rotate, and the water injection nozzle is adjusted to a proper angle;
2) starting a high-pressure water switch and a low-pressure water switch, and forming a ring column type water cavity between the inner wall of the water jetting nozzle and the outer wall of the high-pressure water jetting nozzle, wherein the water cavity is filled with low-pressure water from a low-pressure water hose; the high-pressure water collecting pipe cavity is filled with high-pressure water, the high-pressure water meets the low-pressure water after passing through the high-pressure water nozzle, so that the periphery of the high-pressure jet is filled with the low-pressure water, and the high-pressure jet meeting the low-pressure water generates cavitation water jet through the water jet nozzle;
3) and opening the billet conveying roller, conveying the billets into a descaling cabinet for descaling, and spraying cavitation water jet on the upper and lower surfaces of the billets by the water jet nozzle for descaling.
Claims (8)
1. A cavitation water descaler, comprising: the descaling device comprises a descaling machine box and a descaling water collecting injection pipe arranged in the descaling machine box;
the descaling machine box comprises an upper machine cover, a steel billet conveying roller positioned in the middle of the machine box and a lower water collecting filter box positioned at the lower part of the machine box; the descaling water collecting injection pipe is divided into an upper surface descaling water collecting injection pipe and a lower surface descaling water collecting injection pipe, the upper surface descaling water collecting injection pipe is fixed above the billet conveying roller way through a support, and the lower surface descaling water collecting injection pipe is fixed below the billet conveying roller way through a support;
the descaling water collecting injection pipe consists of a water collecting injection pipe outer cavity, a high-pressure water collecting pipe sleeved in the water collecting injection pipe outer cavity and a low-pressure water collecting pipe arranged between the water collecting injection pipe outer cavity and the high-pressure water collecting pipe; the outer cavity of the water collecting and spraying pipe is a cylinder, the cavity wall is provided with a plurality of rows of cavitation water nozzles and a low-pressure water inlet pipe, and one end of the outer cavity of the water collecting and spraying pipe is provided with a high-pressure water inlet pipe connected with a high-pressure water collecting pipe; the high-pressure water collecting pipe is a cylinder, a plurality of rows of high-pressure water nozzles are arranged on the pipe wall, each high-pressure water nozzle is sleeved with one water jet nozzle, the high-pressure water nozzles and the water jet nozzles are coaxial, the distance between the circle centers of the high-pressure water nozzles adjacent to each other in the horizontal direction is the same as that between the circle centers of the cavitation water nozzles adjacent to each other in the horizontal direction, and the intersection point of the connecting line between the circle centers of the high-pressure water nozzles adjacent to each other in the vertical direction is the same; the low pressure water collector pipe is axially parallel to the outer cavity of the water collecting injection pipe, the water inlet end of the low pressure water collector pipe is connected with the low pressure water inlet pipe, a plurality of low pressure water hoses are uniformly distributed on the pipe wall of the low pressure water collector pipe, and the tail end of each low pressure water hose is opened on the side wall of one water jetting nozzle.
2. The cavitation water descaler according to claim 1, wherein a filter screen is provided on the top of the lower water collecting filter tank; one side of the lower water collecting and filtering box is provided with a drainage pipeline which is externally connected with a circulating filter tank.
3. The cavitation water descaler according to claim 1, wherein the diameter of the nozzle opening of the water jet nozzle is 1 to 3mm larger than the diameter of the nozzle opening of the high pressure water nozzle.
4. The cavitation water descaler according to claim 1, wherein the inner surface of the water jet nozzle is a paraboloid.
5. The cavitation water descaler according to claim 1, wherein an angle between an axis of the water jet nozzle and a vertical direction is 0 to 45 °.
6. The cavitation water descaler according to claim 1, wherein the high pressure water inlet pipe is connected with an external source pressure pump station, and a pressure accumulator is arranged between the pump station and the water inlet pipe; the low-pressure water inlet pipe is externally connected with a low-pressure pump station.
7. The cavitation water descaler according to claim 1, wherein the device is further provided with an automatic cavitation water spraying angle adjusting device, which comprises a corner indexing positioning gear, a corner motorized sprocket and an electromagnetic corner positioning stop brake, wherein the corner indexing positioning gear is arranged outside the other end of the outer cavity of the water collecting spraying pipe and is connected with the high-pressure water collecting pipe through a fixed shaft; the electromagnetic corner positioning brake consists of a band-type brake spring, an electromagnet and an electromagnetic brake, wherein the electromagnetic brake is provided with gear teeth capable of being meshed with the corner indexing positioning gear, and the electromagnet is connected with the electromagnetic brake through the band-type brake spring; the electromagnet is communicated with an external circuit; the corner motorized sprocket is connected with a chain, and the chain is powered by a motor.
8. A cavitation water descaling method using the cavitation water descaler according to any one of claims 1 to 7, comprising the steps of:
1) the electromagnet is electrified, the electromagnetic brake gate is separated from the corner indexing positioning gear, the motor is started to enable the corner motorized sprocket to rotate, and the water injection nozzle is adjusted to a proper angle;
2) starting a high-pressure water switch and a low-pressure water switch, and forming a ring column type water cavity between the inner wall of the water jetting nozzle and the outer wall of the high-pressure water jetting nozzle, wherein the water cavity is filled with low-pressure water from a low-pressure water hose; the high-pressure water collecting pipe cavity is filled with high-pressure water, the high-pressure water meets the low-pressure water after passing through the high-pressure water nozzle, so that the periphery of the high-pressure jet is filled with the low-pressure water, and the high-pressure jet meeting the low-pressure water generates cavitation water jet through the water jet nozzle;
3) and opening the billet conveying roller, conveying the billets into a descaling cabinet for descaling, and spraying cavitation water jet on the upper and lower surfaces of the billets by the water jet nozzle for descaling.
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| CN202011269389.1A CN112474839B (en) | 2020-11-13 | 2020-11-13 | Cavitation water descaling machine and descaling method |
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| CN202011269389.1A CN112474839B (en) | 2020-11-13 | 2020-11-13 | Cavitation water descaling machine and descaling method |
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| CN112474839B CN112474839B (en) | 2023-03-10 |
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| CN211360086U (en) * | 2019-12-25 | 2020-08-28 | 郭庆 | Emulsion spraying device of cold-rolled strip steel rolling mill equipment |
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| CN103415358A (en) * | 2011-05-16 | 2013-11-27 | 新日铁住金工程技术株式会社 | Rolling mill roll-cleaning device and cleaning method |
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| CN106677975A (en) * | 2017-02-21 | 2017-05-17 | 中国石油大学(华东) | Tidal electricity generation device |
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| CN112474839B (en) | 2023-03-10 |
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