CN109794857B - Steel hot rolling process surface scale removing device based on sand blasting process - Google Patents
Steel hot rolling process surface scale removing device based on sand blasting process Download PDFInfo
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- CN109794857B CN109794857B CN201910157549.4A CN201910157549A CN109794857B CN 109794857 B CN109794857 B CN 109794857B CN 201910157549 A CN201910157549 A CN 201910157549A CN 109794857 B CN109794857 B CN 109794857B
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- 238000005488 sandblasting Methods 0.000 title claims abstract description 153
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
- 238000005098 hot rolling Methods 0.000 title claims abstract description 14
- 239000010959 steel Substances 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 187
- 239000002184 metal Substances 0.000 claims abstract description 187
- 239000004576 sand Substances 0.000 claims description 242
- 238000004140 cleaning Methods 0.000 claims description 12
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 39
- 230000000694 effects Effects 0.000 description 11
- 125000004122 cyclic group Chemical group 0.000 description 9
- 239000012535 impurity Substances 0.000 description 7
- 230000003749 cleanliness Effects 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 6
- 239000003086 colorant Substances 0.000 description 5
- 230000003116 impacting effect Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of metal oxide skin removing devices, and particularly relates to a steel hot rolling procedure surface oxide skin removing device based on a sand blasting process, which comprises a metal pipe, a sand blasting module and a controller; the controller is used for controlling the work of the device; the metal pipe is in a cuboid structure; the number of the sand blasting modules is four, the sand blasting modules are symmetrically distributed on four side surfaces of the metal pipe, and each sand blasting module comprises a fan blade, a sand blasting pipeline and a shell; one end of one side of the shell, which is close to the metal pipe, is provided with a metal film, the metal film is fixedly connected with the shell, and the upper end of the shell is fixedly connected with the lower side of the pipeline; the inlet end of the sand blasting pipeline is fixedly provided with the fan blades through the fixed shaft, the caliber of the nozzle end of the sand blasting pipeline is gradually reduced, the nozzle end of the sand blasting pipeline is obliquely arranged, and the oblique direction of the nozzle end of the sand blasting pipeline is opposite to the running direction of the metal pipe; a first hole is formed in the side face, close to the metal pipe, of the sand blasting pipeline and communicated with the interior of the shell.
Description
Technical Field
The invention belongs to the technical field of metal oxide skin removing devices, and particularly relates to a steel hot rolling procedure surface oxide skin removing device based on a sand blasting process.
Background
As is well known, metals have been increasingly used in electronics, decoration, hardware, kitchen equipment and other industries due to their elegant appearance and excellent corrosion resistance; traditional metals are smooth surfaces, but are easily scratched; oxide skin is easy to generate on the outer surface of the metal, and the oxide skin on the surface of the metal needs to be cleaned before processing; at present, domestic enterprises generally adopt a chemical pickling mode (such as hydrochloric acid, sulfuric acid, nitric acid and hydrofluoric acid) to remove oxide skins on the outer surfaces of metals, so that the environmental pollution is serious; the shot blasting descaling method can partially remove oxide skin on the outer surface of the metal, but the dust pollution is serious, dust removal equipment is generally arranged, the process requirements are difficult to meet, and pits are easily generated on the surface of the metal.
The sand blasting method is to mix low-pressure compressed air and sand to clean the metal surface, so that the dust pollution is great and the treatment effect of dust removal equipment is not ideal; in recent years, reports have appeared on the production of sand-blasted metal pipes by sand blasting on the surface of the metal pipes; but because the sand blasting process is to spray sand grains on the metal pipe through the reciprocating nozzle, the center of the sand grain beam sprayed by the nozzle is much stronger than the energy of the edge of the sand grain beam, so that the sand grains at each point on the metal pipe are unevenly distributed, and because the sand blasting process is to spray sand grains on the metal pipe through the reciprocating nozzle; when the metal pipe with the square cross section is subjected to sand blasting, sand blasting can be performed on one surface, so that oxide skin removing efficiency is low, sand cannot be reused generally, and equipment is easy to corrode by sand blasting in the sand blasting process.
Disclosure of Invention
The invention provides a device for removing oxide skin on the surface of a steel hot rolling procedure based on a sand blasting process, aiming at solving the problems that the oxide skin removing efficiency is low, sand cannot be recycled and the sand is easy to corrode equipment in the sand blasting process in the process of removing the oxide skin by sand blasting of metal.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a steel hot rolling procedure surface oxide skin removing device based on a sand blasting process, which comprises a metal pipe, a sand blasting module and a controller, wherein the sand blasting module is used for removing oxide skin on the surface of the metal pipe; the controller is used for controlling the work of the device; the metal pipe is of a cuboid structure; the number of the sand blasting modules is four, the sand blasting modules are symmetrically distributed on four side surfaces of the metal pipe, and each sand blasting module comprises a fan blade, a sand blasting pipeline and a shell; one end of one side of the shell, which is close to the metal pipe, is provided with a metal film, the metal film is fixedly connected with the shell, and the upper end of the shell is fixedly connected with the lower side of the pipeline; the inlet end of the sand blasting pipeline is fixedly provided with the fan blades through the fixed shaft, the caliber of the nozzle end of the sand blasting pipeline is gradually reduced, the nozzle end of the sand blasting pipeline is obliquely arranged, and the oblique direction of the nozzle end of the sand blasting pipeline is opposite to the running direction of the metal pipe; a first hole is formed in the side face, close to the metal pipe, of the sand blasting pipeline and communicated with the interior of the shell. When the metal pipe passes through the sand blasting module, the controller controls sand to be introduced into the sand blasting pipeline, the rapidly flowing sand drives the fan blades to rotate, the fan blades rotate to stir the flowing sand, the sand is prevented from being accumulated on the sand blasting pipeline, the sand is sprayed onto the metal pipe from the nozzle end of the sand blasting pipeline, impurities, variegated colors and oxide layers on the surface of the metal pipe are removed due to the impact and cutting effects of the sand on the surface of the metal pipe, the surface of the metal pipe obtains different roughness degrees, the mechanical property of the surface of the metal pipe is improved, and the fatigue resistance of the metal pipe is improved; the sand absorbs heat quickly, so that the metal pipe can be cooled, the hardness of the metal pipe is increased, and the internal stress on the metal pipe is removed; the sand is sprayed on the surface of the metal pipe, the sand impact force is large, the sand rebounds from the metal pipe to the side wall of the shell, the flow speed of the sand in the sand spraying pipeline is large, the sand is prevented from falling into the shell from the first hole, the utilization rate of the sand is increased, and the sand spraying efficiency is improved; and the sand velocity of flow in the sand blasting pipeline is big, makes the interior hole exit end of sand blasting pipeline produce the negative pressure, and the gas in the casing is inhaled the sand blasting pipeline by a hole, and the sand that rebounds on the casing lateral wall is inhaled back to the sand blasting pipeline along with gas, and the sand temperature reduces at the circulation flow in-process sand, has further improved the cooling effect of sand to metal tubular product, has realized the cyclic utilization of sand, has increased the utilization ratio of sand, has improved the efficiency of sandblast.
Preferably, the angle between the nozzle end of the sand blasting pipeline and the metal pipe is 15-35 degrees. If the angle between the sand sprayed by the sand spraying pipeline and the metal pipe is too large, a large amount of sand cannot rebound to the side wall of the shell, and the large amount of sand cannot return to the sand spraying pipeline again, so that the using amount of the sand is increased, the sand spraying process is increased, and the sand spraying cost is increased; if the sand blasting angle is too small, the sand is partially blasted to the side wall of the shell, so that the utilization rate of the sand is reduced, the sand blasting effect is reduced, and the sand blasting quality is reduced; if sand is sprayed on the inner wall of the shell, the sand erodes the inner wall of the shell, the inner wall of the shell is easily damaged, and the service life of the sand spraying module is shortened; an angle of 15-35 degrees is formed between sand sprayed from the sand spraying pipeline and the metal pipe, the shell is protected, the service life of the sand spraying module is prolonged, the speed of sand impacting the metal pipe is ensured, the effect of sand on removing impurities, variegates and an oxide layer on the surface of the metal pipe is increased, the mechanical property of the surface of the metal pipe is increased, and the fatigue resistance of the metal pipe is improved; the angle between the sand sprayed by the sand spraying pipeline and the metal pipe is controlled to be 15-35 degrees, so that the sand is recovered to the maximum extent, the utilization rate of the sand is increased, the sand spraying cost is reduced, and the sand spraying efficiency is improved.
Preferably, a second hole is formed in the outer side of the sand blasting pipeline, a cleaning module is arranged on the sand blasting pipeline, and the cleaning module comprises a brush rod, a brush, a rotating wheel and a first rod; the rotating wheel is fixedly connected to the side wall of the second hole through a fixed shaft, the rotating wheel is rotatably connected with the fixed shaft, the central shaft of the rotating wheel is hinged with one end of the brush rod, and the other end of the brush rod is fixedly connected with the brush; the brush is eccentrically connected with the rotating wheel through a first rod; the first rod is hinged with the brush and the rotating wheel. When sand flows rapidly in the sand blasting pipeline, the sand impacts the rotating wheel to rotate, the rotating wheel rotates to drive one end of the first rod to rotate, the brush swings under the drive of the first rod, the surface of the metal pipe is cleaned, and the sand is prevented from adhering to the surface of the metal pipe; and the arc-shaped brush swings to enable the brush bristles to sequentially contact with the surface of the metal pipe to clean the surface of the metal pipe, so that the brush bristles are prevented from being softened and damaged by high temperature due to long-time contact with the metal pipe, the utilization rate of the brush is increased, and the cleanliness of the surface of the metal pipe is improved.
Preferably, the side wall of the rotating wheel is uniformly provided with a plurality of through grooves, the rotating wheel on the sand blasting pipeline on the upper side of the metal pipe is not provided with the through grooves, and when sand moves in the sand blasting pipeline, the sand can impact 2-3 through grooves on the rotating wheel. The sand in the sand-blasting pipeline simultaneously impacts the side walls of 2 to 3 through grooves on the rotating wheel, the impact force increases the rotating speed of the rotating wheel, the cleaning capacity of the brush is improved, and the cleanliness of the surface of the metal pipe is increased; through groove on the sand impact runner, the sand that leads to in the groove on the side sandblast module around the metal tubular product can be followed and led to the groove both ends and fall back and spout the sand pipe way, has avoided the sand to be taken out by the runner and has spouted the sand pipe way, has increased the utilization ratio of sand, has improved the efficiency of sandblast.
Preferably, the through groove is herringbone. Sand in the sand blasting pipeline is spouted to lambdoidal logical inslot, and sand striking lambdoidal through groove lateral wall, sand from the lambdoidal through groove both sides fall back the sand blasting pipeline, and the sand strikes the more easy logical groove of discharging behind the lambdoidal through groove, has avoided the sand to be taken out the sand blasting pipeline by the runner, has increased the utilization ratio of sand, has reduced the expense of sandblast, has improved the efficiency of sandblast.
Preferably, two third grooves are formed in the side wall of the shell, a metal elastic sheet is arranged between the metal flexible sheet on the side wall of the shell and the sand blasting pipeline, and two ends of the metal elastic sheet are inserted into the third grooves; the first hole outlet angle is gradually reduced along the movement direction of the metal pipe. Sand is sprayed on the surface of the metal pipe, the sand impact force is large, the sand rebounds from the metal pipe to the side wall of the shell, and the sand impacts the side wall of the shell for a long time and is easy to erode the side wall of the shell; the metal elastic sheet is fixedly arranged on the side wall of the shell, so that the corrosion of the side wall of the shell is avoided, the service life of the sand blasting module is prolonged, and the sand blasting efficiency is improved; the elastic force of the metal elastic sheet is larger than that of the side wall of the shell, so that the resilience force of the sand on the metal elastic sheet is improved, the sand can easily return to the sand blasting pipeline from the first hole under the action of negative pressure, the cyclic utilization rate of the sand is increased, and the sand blasting efficiency is improved; the outlet angle of the first hole is gradually reduced along the movement direction of the metal pipe, so that the movement direction of sand entering the sand blasting pipeline from the shell through the first hole is consistent with the movement direction of sand in the sand blasting pipeline, the sand acceleration time is reduced, and the sand blasting efficiency is improved; and sand strikes metal shrapnel, and sand is by the angle coincidence in metal shrapnel bounce messenger sand bounce and a hole, avoids sand striking to fall back metal tubular product surface on the casing roof, has improved the cyclic utilization of sand and has improved the efficiency of sandblast.
The invention has the following beneficial effects:
1. according to the device for removing the surface oxide skin of the steel hot rolling procedure based on the sand blasting process, impurities, variegates and oxide layers on the surface of the metal pipe are removed through the matching of the sand blasting die pipeline and the metal pipe, the surface of the metal pipe is enabled to obtain different roughness degrees, the mechanical property of the surface of the metal pipe is improved, and therefore the fatigue resistance of the metal pipe is improved.
2. According to the device for removing the surface oxide skin of the steel hot rolling procedure based on the sand blasting process, the surface of the metal pipe is cleaned by the brush through the matching of the rotating wheel and the cleaning module, sand is prevented from adhering to the surface of the metal pipe, and the sand blasting efficiency of the metal pipe is improved.
3. According to the device for removing the surface scale in the steel hot rolling process based on the sand blasting process, the herringbone through grooves are formed in the rotating wheel, so that sand can be discharged from the herringbone through grooves more easily after impacting the herringbone through grooves, the sand is prevented from being brought out of a sand blasting pipeline by the rotating wheel, the utilization rate of the sand is increased, the sand blasting cost is reduced, and the sand blasting efficiency is improved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a view looking down at C in FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a view at B in FIG. 3;
in the figure: the cleaning device comprises a metal pipe 1, a sand blasting module 2, fan blades 21, a sand blasting pipeline 22, a shell 23, a metal film 231, a first hole 3, a cleaning module 4, a brush rod 41, a brush 42, a rotating wheel 43, a first rod 44, a through groove 5 and a metal elastic sheet 6.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the device for removing surface scale of a steel hot rolling process based on a sand blasting process according to the present invention comprises a metal pipe 1, a sand blasting module 2 and a controller; the controller is used for controlling the work of the device; the metal pipe 1 is of a cuboid structure; the number of the sand blasting modules 2 is four, the sand blasting modules 2 are symmetrically distributed on four side surfaces of the metal pipe 1, and each sand blasting module 2 comprises a fan blade 21, a sand blasting pipeline 22 and a shell 23; one end of one side of the shell 23, which is close to the metal pipe 1, is provided with a metal film 231, the metal film 231 is fixedly connected with the shell 23, and the upper end of the shell 23 is fixedly connected with the lower side of the pipeline; the inlet end of the sand blasting pipeline 22 is fixedly provided with fan blades 21 through a fixed shaft, the diameter of the nozzle end of the sand blasting pipeline 22 is gradually reduced, the nozzle end of the sand blasting pipeline 22 is obliquely arranged, and the oblique direction of the nozzle end of the sand blasting pipeline 22 is opposite to the running direction of the metal pipe 1; a first hole 3 is formed in the side face, close to the metal pipe 1, of the sand blasting pipeline 22, and the first hole 3 is communicated with the interior of the shell 23. When the metal pipe 1 passes through the sand blasting module 2, the controller controls sand to be introduced into the sand blasting pipeline 22, the rapidly flowing sand drives the fan blades 21 to rotate, the fan blades 21 rotate to stir the flowing sand, the sand is prevented from being accumulated on the sand blasting pipeline 22, the sand is sprayed onto the metal pipe 1 from the nozzle end of the sand blasting pipeline 22, impurities, variegated colors and oxide layers on the surface of the metal pipe 1 are removed due to the impact and cutting action of the sand on the surface of the metal pipe 1, the surface of the metal pipe 1 is subjected to different roughness degrees, the mechanical property of the surface of the metal pipe 1 is improved, and the fatigue resistance of the metal pipe 1 is improved; the sand absorbs heat quickly, so that the metal pipe 1 can be cooled, the hardness of the metal pipe 1 is increased, and the internal stress on the metal pipe 1 is removed; sand is sprayed on the surface of the metal pipe 1, sand impact force is large, sand rebounds from the metal pipe 1 to the side wall of the shell 23, sand flow speed in the sand spraying pipeline 22 is high, sand is prevented from falling into the shell 23 from the first hole 3, utilization rate of the sand is increased, and sand spraying efficiency is improved; and the sand flow velocity in the sand blasting pipeline 22 is high, so that a negative pressure is generated at the outlet end of the first hole 3 in the sand blasting pipeline 22, the gas in the shell 23 is sucked into the sand blasting pipeline 22 through the first hole 3, the sand rebounded on the side wall of the shell 23 is sucked back into the sand blasting pipeline 22 along with the gas, and the temperature of the sand is reduced in the circulating flow process, so that the cooling effect of the sand on the metal pipe 1 is further improved, the cyclic utilization of the sand is realized, the utilization rate of the sand is increased, and the sand blasting efficiency is improved.
As an embodiment of the invention, the angle between the nozzle end of the sand blasting pipeline 22 and the metal pipe 1 is 15-35 degrees. If the angle between the sand sprayed by the sand spraying pipeline 22 and the metal pipe 1 is too large, a large amount of sand cannot rebound to the side wall of the shell 23, and a large amount of sand cannot return to the sand spraying pipeline 22 again, so that the use amount of the sand is increased, the sand spraying process is increased, and the sand spraying cost is increased; if the sand blasting angle is too small, the sand is partially blasted to the side wall of the shell 23, so that the utilization rate of the sand is reduced, the sand blasting effect is reduced, and the sand blasting quality is reduced; if sand is sprayed on the inner wall of the shell 23, the sand erodes the inner wall of the shell 23, the inner wall of the shell 23 is easily damaged, and the service life of the sand blasting module 2 is shortened; the sand sprayed by the sand spraying pipeline 22 is controlled to form an angle of 15-35 degrees with the metal pipe 1, the shell 23 is protected, the service life of the sand spraying module 2 is prolonged, the speed of sand impacting the metal pipe 1 is ensured, the effect of sand on removing impurities, variegated colors and an oxide layer on the surface of the metal pipe 1 is increased, the mechanical property of the surface of the metal pipe 1 is increased, and the fatigue resistance of the metal pipe 1 is improved; the sand sprayed by the sand spraying pipeline 22 is controlled to form an angle of 15-35 degrees with the metal pipe 1, so that the sand is recovered to the maximum extent, the utilization rate of the sand is increased, the sand spraying cost is reduced, and the sand spraying efficiency is improved.
As an embodiment of the present invention, a second hole is formed outside the sandblasting pipe 22, a cleaning module 4 is arranged on the sandblasting pipe 22, and the cleaning module 4 includes a brush rod 41, a brush 42, a rotating wheel 43 and a first rod 44; the rotating wheel 43 is fixedly connected to the side wall of the second hole through a fixed shaft, the rotating wheel 43 is rotatably connected with the fixed shaft, the central shaft of the rotating wheel 43 is hinged with one end of the brush rod 41, and the other end of the brush rod 41 is fixedly connected with the brush 42; the brush 42 is eccentrically connected with the rotating wheel 43 through a first rod 44; the first rod 44 is hinged to both the brush 42 and the rotating wheel 43. When sand flows rapidly in the sand blasting pipeline 22, the sand impacts the rotating wheel 43 to rotate, the rotating wheel 43 rotates to drive one end of the first rod 44 to rotate, the brush 42 swings under the drive of the first rod 44 to clean the surface of the metal pipe 1, and sand is prevented from adhering to the surface of the metal pipe 1; and the arc-shaped brush 42 swings to enable the brush bristles to sequentially contact with the surface of the metal pipe 1 to clean the surface of the metal pipe 1, so that the brush bristles are prevented from being softened and damaged by high temperature due to long-time contact with the metal pipe 1, the utilization rate of the brush 42 is increased, and the cleanliness of the surface of the metal pipe 1 is improved.
As an embodiment of the invention, a plurality of through grooves 5 are uniformly arranged on the side wall of the rotating wheel 43, no through groove 5 is arranged on the rotating wheel 43 on the sand blasting pipeline 22 on the upper side of the metal pipe 1, and when sand moves in the sand blasting pipeline 22, the sand can impact 2-3 through grooves 5 on the rotating wheel 43. The sand in the sand-blasting pipeline 22 simultaneously impacts the side walls of 2 to 3 through grooves 5 on the rotating wheel 43, the impact force increases the rotating speed of the rotating wheel 43, the cleaning capacity of the brush 42 is improved, and the surface cleanliness of the metal pipe 1 is increased; through groove 5 on sand impact runner 43, the sand that leads to in groove 5 on the side sandblast module 2 around tubular metal resonator 1 can be followed through groove 5 both ends and fall back and spout sand pipe way 22, has avoided the sand to be taken out by runner 43 and has spouted sand pipe way 22, has increased the utilization ratio of sand, has improved the efficiency of sandblast.
In one embodiment of the present invention, the through groove 5 is a herringbone. Sand in the sand blasting pipeline 22 spouts herringbone through groove 5 in, sand striking herringbone through groove 5 lateral wall, sand falls back sand blasting pipeline 22 from herringbone through groove 5 both sides, and sand striking herringbone through groove 5 is discharged more easily after, has avoided sand to be taken out sand blasting pipeline 22 by runner 43, has increased the utilization ratio of sand, has reduced the expense of sandblast, has improved the efficiency of sandblast.
As an embodiment of the present invention, two No. three grooves are formed on the side wall of the housing 23, a metal elastic sheet 6 is arranged between the metal flexible sheet 231 and the sand blast pipeline 22 on the side wall of the housing 23, and two ends of the metal elastic sheet 6 are inserted into the No. three grooves; the outlet angle of the first hole 3 is gradually reduced along the moving direction of the metal pipe 1. Sand is sprayed on the surface of the metal pipe 1, the sand impact force is large, the sand rebounds from the metal pipe 1 to the side wall of the shell 23, and the sand impacts the side wall of the shell 23 for a long time and is easy to corrode the side wall of the shell 23; the metal elastic sheet 6 is fixedly arranged on the side wall of the shell 23, so that the corrosion of the side wall of the shell 23 is avoided, the service life of the sand blasting module 2 is prolonged, and the sand blasting efficiency is improved; the elastic force of the metal elastic sheet 6 is larger than that of the side wall of the shell 23, so that the resilience force of sand on the metal elastic sheet 6 is improved, the sand can easily return to the sand spraying pipeline 22 from the first hole 3 under the action of negative pressure, the cyclic utilization rate of the sand is increased, and the sand spraying efficiency is improved; the outlet angle of the first hole 3 is gradually reduced along the moving direction of the metal pipe 1, so that the moving direction of sand entering the sand blasting pipeline 22 from the shell 23 through the first hole 3 is consistent with the moving direction of sand in the sand blasting pipeline 22, the sand acceleration time is shortened, and the sand blasting efficiency is improved; and sand strikes metal shrapnel 6, and the sand is by the angle coincidence of metal shrapnel 6 bounced angle that makes sand bounce and a hole 3, avoids sand striking to fall back on 23 roof of casing 1 surfaces on the metal tubular product, has improved the cyclic utilization of sand and has improved the efficiency of sandblast.
The specific working process is as follows:
when the metal pipe 1 passes through the sand blasting module 2, the controller controls sand to be introduced into the sand blasting pipeline 22, the rapidly flowing sand drives the fan blades 21 to rotate, the fan blades 21 rotate to stir the flowing sand, the sand is prevented from being accumulated on the sand blasting pipeline 22, the sand is sprayed onto the metal pipe 1 from the nozzle end of the sand blasting pipeline 22, impurities, variegated colors and oxide layers on the surface of the metal pipe 1 are removed due to the impact and cutting action of the sand on the surface of the metal pipe 1, the surface of the metal pipe 1 is subjected to different roughness degrees, the mechanical property of the surface of the metal pipe 1 is improved, and the fatigue resistance of the metal pipe 1 is improved; the sand absorbs heat quickly, so that the metal pipe 1 can be cooled, the hardness of the metal pipe 1 is increased, and the internal stress on the metal pipe 1 is removed; sand is sprayed on the surface of the metal pipe 1, sand impact force is large, sand rebounds from the metal pipe 1 to the side wall of the shell 23, sand flow speed in the sand spraying pipeline 22 is high, sand is prevented from falling into the shell 23 from the first hole 3, utilization rate of the sand is increased, and sand spraying efficiency is improved; the sand flow velocity in the sand blasting pipeline 22 is high, so that negative pressure is generated at the outlet end of the first hole 3 in the sand blasting pipeline 22, the gas in the shell 23 is sucked into the sand blasting pipeline 22 through the first hole 3, sand rebounded to the side wall of the shell 23 is sucked back to the sand blasting pipeline 22 along with the gas, the temperature of the sand is reduced in the circulating flow process, the cooling effect of the sand on the metal pipe 1 is further improved, the cyclic utilization of the sand is realized, the utilization rate of the sand is increased, and the sand blasting efficiency is improved; the sand sprayed by the sand spraying pipeline 22 is controlled to form an angle of 15-35 degrees with the metal pipe 1, the shell 23 is protected, the service life of the sand spraying module 2 is prolonged, the speed of sand impacting the metal pipe 1 is ensured, the effect of sand on removing impurities, variegated colors and an oxide layer on the surface of the metal pipe 1 is increased, the mechanical property of the surface of the metal pipe 1 is increased, and the fatigue resistance of the metal pipe 1 is improved; controlling the angle between the sand sprayed by the sand spraying pipeline 22 and the metal pipe 1 to be 15-35 degrees, so that the sand is recovered to the maximum extent, the utilization rate of the sand is increased, the sand spraying cost is reduced, and the sand spraying efficiency is improved; when sand flows rapidly in the sand blasting pipeline 22, the sand impacts the rotating wheel 43 to rotate, the rotating wheel 43 rotates to drive one end of the first rod 44 to rotate, the brush 42 swings under the drive of the first rod 44 to clean the surface of the metal pipe 1, and sand is prevented from adhering to the surface of the metal pipe 1; the arc-shaped brush 42 swings to enable the bristles to sequentially contact with the surface of the metal pipe 1 to clean the surface of the metal pipe 1, so that the bristles are prevented from being softened and damaged by high temperature due to long-time contact with the metal pipe 1, the utilization rate of the brush 42 is increased, and the surface cleanliness of the metal pipe 1 is improved; the sand in the sand-blasting pipeline 22 simultaneously impacts the side walls of 2 to 3 through grooves 5 on the rotating wheel 43, the impact force increases the rotating speed of the rotating wheel 43, the cleaning capacity of the brush 42 is improved, and the surface cleanliness of the metal pipe 1 is increased; the sand impacts the through groove 5 on the rotating wheel 43, and the sand can fall back to the sand blasting pipeline 22 from the through groove 5, so that the sand is prevented from being brought out of the sand blasting pipeline 22 by the rotating wheel 43, the utilization rate of the sand is increased, and the sand blasting efficiency is improved; the sand in the sand spraying pipeline 22 is sprayed into the herringbone through groove 5, the sand impacts the side wall of the herringbone through groove 5, the sand falls back to the sand spraying pipeline 22 from two sides of the herringbone through groove 5, the sand is discharged more easily after impacting the herringbone through groove 5, the sand is prevented from being brought out of the sand spraying pipeline 22 by the rotating wheel 43, the utilization rate of the sand is increased, the sand spraying cost is reduced, and the sand spraying efficiency is improved; sand is sprayed on the surface of the metal pipe 1, the sand impact force is large, the sand rebounds from the metal pipe 1 to the side wall of the shell 23, and the sand impacts the side wall of the shell 23 for a long time and is easy to corrode the side wall of the shell 23; the metal elastic sheet 6 is fixedly arranged on the side wall of the shell 23, so that the corrosion of the side wall of the shell 23 is avoided, the service life of the sand blasting module 2 is prolonged, and the sand blasting efficiency is improved; the elastic force of the metal elastic sheet 6 is larger than that of the side wall of the shell 23, so that the resilience force of sand on the metal elastic sheet 6 is improved, the sand can easily return to the sand spraying pipeline 22 from the first hole 3 under the action of negative pressure, the cyclic utilization rate of the sand is increased, and the sand spraying efficiency is improved; the outlet angle of the first hole 3 is gradually reduced along the moving direction of the metal pipe 1, so that the moving direction of sand entering the sand blasting pipeline 22 from the shell 23 through the first hole 3 is consistent with the moving direction of sand in the sand blasting pipeline 22, the sand acceleration time is shortened, and the sand blasting efficiency is improved; and sand strikes metal shrapnel 6, and the sand is by the angle coincidence of metal shrapnel 6 bounced angle that makes sand bounce and a hole 3, avoids sand striking to fall back on 23 roof of casing 1 surfaces on the metal tubular product, has improved the cyclic utilization of sand and has improved the efficiency of sandblast.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A steel hot rolling process surface scale remove device based on sandblast technology which characterized in that: comprises a metal pipe (1), a sand blasting module (2) and a controller; the controller is used for controlling the work of the device; the metal pipe (1) is of a cuboid structure; the number of the sand blasting modules (2) is four, the sand blasting modules (2) are symmetrically distributed on four side faces of the metal pipe (1), and each sand blasting module (2) comprises a fan blade (21), a sand blasting pipeline (22) and a shell (23); one end of one side of the shell (23), which is close to the metal pipe (1), is provided with a metal film (231), the metal film (231) is fixedly connected with the shell (23), and the upper end of the shell (23) is fixedly connected with the lower side of the pipeline; the inlet end of the sand blasting pipeline (22) is fixedly provided with fan blades (21) through a fixed shaft, the diameter of the nozzle port of the sand blasting pipeline (22) is gradually reduced, the nozzle end of the sand blasting pipeline (22) is obliquely arranged, and the oblique direction of the nozzle end of the sand blasting pipeline (22) is opposite to the running direction of the metal pipe (1); a first hole (3) is formed in the side face, close to the metal pipe (1), of the sand blasting pipeline (22), the first hole (3) is communicated with the interior of the shell (23), the angle between the end, close to the metal pipe (1), of the sand blasting pipeline (22) and the metal pipe (1) is 15-35 degrees, two third grooves are formed in the side wall of the shell (23), a metal elastic sheet (6) is arranged between the metal flexible sheet (231) and the sand blasting pipeline (22) in the side wall of the shell (23), and two ends of the metal elastic sheet (6) are inserted into the third grooves; the outlet angle of the first hole (3) is gradually reduced along the movement direction of the metal pipe (1).
2. The steel hot rolling process surface scale removing device based on the sand blasting process according to claim 1, characterized in that: a second hole is formed in the outer side of the sand blasting pipeline (22), a cleaning module (4) is arranged on the sand blasting pipeline (22), and the cleaning module (4) comprises a brush rod (41), a brush (42), a rotating wheel (43) and a first rod (44); the rotating wheel (43) is fixedly connected to the side wall of the second hole through a fixed shaft, the rotating wheel (43) is rotatably connected with the fixed shaft, the central shaft of the rotating wheel (43) is hinged with one end of the brush rod (41), and the other end of the brush rod (41) is fixedly connected with the brush (42); the brush (42) is eccentrically connected with the rotating wheel (43) through a first rod (44); the first rod (44) is hinged with the brush (42) and the rotating wheel (43).
3. The steel hot rolling process surface scale removing device based on the sand blasting process as claimed in claim 2, wherein: the side wall of the rotating wheel (43) is uniformly provided with a plurality of through grooves (5), the rotating wheel (43) on the sand blasting pipeline (22) on the upper side of the metal pipe (1) is not provided with the through grooves (5), and when sand moves in the sand blasting pipeline (22), the sand can impact 2-3 through grooves (5) on the rotating wheel (43).
4. The steel hot rolling process surface scale removing device based on the sand blasting process as claimed in claim 3, wherein: the through groove (5) is in a shape of Chinese character 'Hui'.
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