CN106002644A - Treatment method for inner surface of steel high pressure gas cylinder for high purity gas - Google Patents
Treatment method for inner surface of steel high pressure gas cylinder for high purity gas Download PDFInfo
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- CN106002644A CN106002644A CN201610391835.3A CN201610391835A CN106002644A CN 106002644 A CN106002644 A CN 106002644A CN 201610391835 A CN201610391835 A CN 201610391835A CN 106002644 A CN106002644 A CN 106002644A
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- gas cylinder
- pressure gas
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- polishing
- cylinder inner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
Abstract
The invention discloses a treatment method for an inner surface of a steel high pressure gas cylinder for a high purity gas. The treatment method comprises the steps of cleaning drying treatment, shot blasting treatment, secondary cleaning drying treatment, grinding treatment and tertiary cleaning drying treatment. According to the treatment method, in the grinding treatment step, when the steel high pressure gas cylinder and a polishing tube relatively rotate, the polishing tube sprays a mixed liquid of polishing powder and a grinding liquid to the inner surface of the steel high pressure gas cylinder to sequentially carry out coarse grinding, fine grinding and polishing on the inner surface of the steel high pressure gas cylinder, so that the degree of finish and purity of the inner surface of the steel high pressure gas cylinder are effectively guaranteed, and the purity and long-term stability of the accommodated high purity gas can be effectively guaranteed.
Description
Technical field
The present invention relates to the internal surface treatment method of a kind of gas cylinder, especially relate to the processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface.
Background technology
Development along with modern industrial technology, the demand of the high-purity gas such as electron level gas, special gas and calibrating gas is continuously increased by the high-technology field such as microelectronics, Aero-Space, biological engineering, new material, accurate metallurgy, environmental science, it is desirable to the most constantly increase.Present stage, purity be more than 99.999% high-purity gas fill and many selections steel high-pressure gas cylinder gas cylinder during accumulating (nominal operating pressure is gas cylinder equal to or more than the gas cylinder of 8MPa), the purity of high-purity gas is had a significant impact by the sole mass of steel high-pressure gas cylinder.
When steel high-pressure gas cylinder inner surface quality is defective, high-purity gas can be polluted.Pollution in steel high-pressure gas cylinder includes infiltration, absorption and chemical action etc., and the bright and clean and degree of drying of steel high-pressure gas cylinder internal, also has a direct impact high-purity gas purity.After high-purity gas is contaminated, gas purity declines, and the objectionable impurities content such as internal particle, moisture increases so that it is become substandard product.Therefore, for ensureing the purity of high-purity gas, need the steel high-pressure gas cylinder inner surface to selecting to process to meet the needs of high-purity gas.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides the processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface.
The present invention is to solve that above-mentioned technical problem be the technical scheme is that the processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface, comprise the following steps:
1), cleaning-drying processes: utilize tap water to be carried out the inner surface of steel high-pressure gas cylinder processing, the main corrosion thing removing steel high-pressure gas cylinder inner surface, then the hot blow pipe inserted in steel high-pressure gas cylinder is utilized to be passed through steam, the inside of purging steel high-pressure gas cylinder, steel high-pressure gas cylinder inner surface is dried process, and removes the greasy dirt of steel high-pressure gas cylinder inner surface；
2), Shot Blasting: high speed shot stream is ejected into the steel high-pressure gas cylinder inner surface that step 1) processed, thus removes oxide layer and the field trash of steel high-pressure gas cylinder inner surface；
3), cleaning-drying processes again: use the method for step 1) again to process steel high-pressure gas cylinder inner surface, with removal step 2) dirt that produces；
4), milled processed:
5), cleaning-drying processes for the third time；
Milled processed in step 4) includes following three step:
1., corase grind: polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, the corase grind mixed liquor that polishing pipe mixes with lapping liquid to steel high-pressure gas cylinder inner surface jet polishing powder；In this step, the particle diameter of polishing powder is 46-80 mesh, polishing powder and lapping liquid are carried by respective hydraulic pump respectively, and both are carrying out the spout ejection of mixing the most polished final pipe after respective hydraulic pump, and in this step, operation hours is 1.5-2.5 hour；
2., fine grinding: the polishing powder that lapping liquid and particle diameter are 80-120 mesh is mixed to get fine grinding mixed liquor, this fine grinding mixed liquor is made to transport polishing pipe through a hydraulic pump, 1. the steel high-pressure gas cylinder processed step carries out fine grinding, during fine grinding, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe sprays fine grinding mixed liquor to steel high-pressure gas cylinder inner surface；In this step, operation hours is 3-5 hour；
3. polishing: the polishing powder that lapping liquid and particle diameter are 120-500 mesh is mixed to get polishing mixed liquor, this polishing mixed liquor is made to transport polishing pipe through a hydraulic pump, 2. the steel high-pressure gas cylinder processed step is polished, during polishing, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe is to steel high-pressure gas cylinder inner surface jet polishing mixed liquor；In this step, operation hours is 15-25 hour；
Further, in described step 4), the composition of lapping liquid is: tap water, suspension and rust remover, and the volume proportion of three is: 100:5:2, and described polishing powder is white fused alumina abrasive material.
Further, in described step 4), corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor are all perpendicular with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection.
Further, in described step 4), the expulsion pressure spraying corresponding mixed liquor to steel high-pressure gas cylinder inner surface from polishing pipe is 15-25MPa, and polishing pipe rotary speed is 5-10r/min, and the rotary speed of steel high-pressure gas cylinder is 80-100r/min.
Further, in described step 4), when being ground steel high-pressure gas cylinder inner surface processing, being positioned on support by steel high-pressure gas cylinder, making the central axis of steel high-pressure gas cylinder and ground is 10-20 °, and opening up inclination.
Further, in described step 1), hot blow pipe inserts the 1/2-2/3 of a length of steel high-pressure gas cylinder height in steel high-pressure gas cylinder, and the temperature of steam is 75 DEG C-85 DEG C, and during purging, steam pressure is 0.4-0.6 MPa, and purge time is no less than 60min.
Further, described step 2) in, the speed of high speed shot stream is 5-10m/s, a diameter of 2-4mm of shot, and the operating pressure of shot stream is 0.5-0.7MPa, and the time of ball blast is 15-25min.
Further, the method that in step 5), third time cleaning-drying processes is: use the distilled water solution of corrosion inhibiter to be carried out steel high-pressure gas cylinder inner surface, removing step 4) metal dust that produces, then clean steel high-pressure gas cylinder internal, removing step 4 with tap water) remaining dirt of producing；Then with steam blowing steel high-pressure gas cylinder inner surface, steel high-pressure gas cylinder inner surface is carried out preliminarily dried, finally use constant temperature heating device that steel high-pressure gas cylinder inner surface is carried out drying and processing, remove traces of moisture therein and oil point.
Further, the mass concentration of the distilled water solution of the corrosion inhibiter described in step 5) is 4%-6%, and described corrosion inhibiter is sodium molybdate.
Further, in described step 5), constant temperature heating device carries out the temperature of drying and processing and controls as 120-160 DEG C steel high-pressure gas cylinder inner surface.
Beneficial effect:
Steel high-pressure gas cylinder after using this method to process, inner surface fineness is higher, and inner surface is not likely to produce gauffer, it is ensured that steel high-pressure gas cylinder internal is cleaner, dry, it is possible to purity and the long-time stability of high-purity gas are effectively ensured.
The especially milled processed of step 4), make steel high-pressure gas cylinder and polishing pipe while rotating against, the inner surface of steel high-pressure gas cylinder is ground to the mixed liquor of the inner surface jet polishing powder of steel high-pressure gas cylinder with lapping liquid by polishing pipe, it is effectively improved the quality of grinding, it is ensured that fineness that steel high-pressure gas cylinder inner surface is higher and degree of purity.
Below in conjunction with detailed description of the invention, the present invention done the most concrete detailed description.
Detailed description of the invention
Embodiment one:
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface, comprises the following steps:
1), cleaning-drying processes: utilize tap water to be carried out the inner surface of steel high-pressure gas cylinder processing, the main corrosion thing removing steel high-pressure gas cylinder inner surface, then the hot blow pipe inserted in steel high-pressure gas cylinder is utilized to be passed through steam, the inside of purging steel high-pressure gas cylinder, steel high-pressure gas cylinder inner surface is dried process, and removes the greasy dirt of steel high-pressure gas cylinder inner surface；
In the present embodiment, hot blow pipe inserts 1/2 of a length of steel high-pressure gas cylinder height in steel high-pressure gas cylinder, and the temperature of steam is 75 DEG C, and during purging, steam pressure is 0.4 MPa, and purge time is 65min.
2), Shot Blasting: high speed shot stream is ejected into the steel high-pressure gas cylinder inner surface that step 1) processed, thus removes oxide layer and the field trash of steel high-pressure gas cylinder inner surface；
In the present embodiment, the speed of high speed shot stream is 5m/s, a diameter of 2mm of shot, and the operating pressure of shot stream is 0.5MPa, and the time of ball blast is 15min.
3), cleaning-drying processes again: use the method for step 1) again to process steel high-pressure gas cylinder inner surface, with removal step 2) dirt that produces；
4), milled processed:
1., corase grind: polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, the corase grind mixed liquor that polishing pipe mixes with lapping liquid to steel high-pressure gas cylinder inner surface jet polishing powder；The present embodiment is in this step, the particle diameter of polishing powder is 46 mesh, polishing powder and lapping liquid are carried by respective hydraulic pump respectively, and both are carrying out the spout ejection of mixing the most polished final pipe after respective hydraulic pump, and in this step, operation hours is 1.5 hours；
2., fine grinding: in the present embodiment during fine grinding, the polishing powder that lapping liquid and particle diameter are 80 mesh is mixed to get fine grinding mixed liquor, this fine grinding mixed liquor is made to transport polishing pipe through a hydraulic pump, 1. the steel high-pressure gas cylinder processed step carries out fine grinding, during fine grinding, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe sprays fine grinding mixed liquor to steel high-pressure gas cylinder inner surface；In this step, operation hours is 3 hours；
3. polishing: in the present embodiment during polishing, the polishing powder that lapping liquid and particle diameter are 120 mesh is mixed to get polishing mixed liquor, this polishing mixed liquor is made to transport polishing pipe through a hydraulic pump, 2. the steel high-pressure gas cylinder processed step is polished, during polishing, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe is to steel high-pressure gas cylinder inner surface jet polishing mixed liquor；In this step, operation hours is 15 hours；
In this step 4), the composition of lapping liquid is: tap water, suspension and rust remover, and the volume proportion of three is: 100:5:2.Described polishing powder is white fused alumina abrasive material.
In this step 4), corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor are preferably the most perpendicular with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection, i.e. roughly grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor perpendicular with the central axis of steel high-pressure gas cylinder from the direction of polishing pipe ejection.
During actual application, corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor can be also remaining angle with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection, that is, be certain inclination angle but out of plumb with the central axis of steel high-pressure gas cylinder.
When being embodied as, by notch setting on the sidewall of polishing pipe, the injection of corresponding mixed liquor can be realized by mounting spray head.
The present embodiment, in step 4), the expulsion pressure spraying corresponding mixed liquor to steel high-pressure gas cylinder inner surface from polishing pipe is 15MPa, and polishing pipe rotary speed is 5r/min, and the rotary speed of steel high-pressure gas cylinder is 80r/min.
The present embodiment, in step 4), when being ground steel high-pressure gas cylinder inner surface processing, is positioned over steel high-pressure gas cylinder on support, adjusting pole, and making the central axis of steel high-pressure gas cylinder and ground is 10 °, and opening up inclination.
5), cleaning-drying processes for the third time；
Steel high-pressure gas cylinder inner surface is carried out by the distilled water solution using corrosion inhibiter, removing step 4) metal dust that produces, then clean steel high-pressure gas cylinder internal, removing step 4 with tap water) remaining dirt of producing；Then with steam blowing steel high-pressure gas cylinder inner surface, steel high-pressure gas cylinder inner surface is carried out preliminarily dried, finally use constant temperature heating device that steel high-pressure gas cylinder inner surface is carried out drying and processing, remove traces of moisture therein and oil point.
The present embodiment, the mass concentration of the distilled water solution of the corrosion inhibiter described in this step 5) is 4%, and described corrosion inhibiter is sodium molybdate.
The present embodiment, in this step 5), constant temperature heating device carries out the temperature of drying and processing and controls to be 120 DEG C steel high-pressure gas cylinder inner surface.
Embodiment two:
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface, comprises the following steps:
1), cleaning-drying processes: utilize tap water to be carried out the inner surface of steel high-pressure gas cylinder processing, the main corrosion thing removing steel high-pressure gas cylinder inner surface, then the hot blow pipe inserted in steel high-pressure gas cylinder is utilized to be passed through steam, the inside of purging steel high-pressure gas cylinder, steel high-pressure gas cylinder inner surface is dried process, and removes the greasy dirt of steel high-pressure gas cylinder inner surface；
In this step, hot blow pipe inserts 7/12 of a length of steel high-pressure gas cylinder height in steel high-pressure gas cylinder, and the temperature of steam is 80 DEG C, and during purging, steam pressure is 0.5 MPa, and purge time is 80min.
2), Shot Blasting: high speed shot stream is ejected into the steel high-pressure gas cylinder inner surface that step 1) processed, thus removes oxide layer and the field trash of steel high-pressure gas cylinder inner surface；
The present embodiment, in this step, the speed of high speed shot stream is 7.5m/s, a diameter of 3mm of shot, and the operating pressure of shot stream is 0.6MPa, and the time of ball blast is 20min.
3), cleaning-drying processes again: use the method for step 1) again to process steel high-pressure gas cylinder inner surface, with removal step 2) dirt that produces；
4), milled processed:
1., corase grind: polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, the corase grind mixed liquor that polishing pipe mixes with lapping liquid to steel high-pressure gas cylinder inner surface jet polishing powder；The present embodiment, in this step, the particle diameter of polishing powder is 63 mesh, and polishing powder and lapping liquid are carried by respective hydraulic pump respectively, both are carrying out the spout ejection of mixing the most polished final pipe after respective hydraulic pump, and in this step, operation hours is 2 hours；
2., fine grinding: in the present embodiment, during fine grinding, the polishing powder that lapping liquid and particle diameter are 100 mesh is mixed to get fine grinding mixed liquor, this fine grinding mixed liquor is made to transport polishing pipe through a hydraulic pump, 1. the steel high-pressure gas cylinder processed step carries out fine grinding, during fine grinding, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe sprays fine grinding mixed liquor to steel high-pressure gas cylinder inner surface；In this step, operation hours is 4 hours；
3. polishing: in the present embodiment, during polishing, the polishing powder that lapping liquid and particle diameter are 310 mesh is mixed to get polishing mixed liquor, this polishing mixed liquor is made to transport polishing pipe through a hydraulic pump, 2. the steel high-pressure gas cylinder processed step is polished, during polishing, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe is to steel high-pressure gas cylinder inner surface jet polishing mixed liquor；In this step, operation hours is 20 hours；
In this step 4), the composition of lapping liquid is: tap water, suspension and rust remover, and the volume proportion of three is: 100:5:2, and described polishing powder is white fused alumina abrasive material.
In this step 4), corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor are preferably the most perpendicular with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection, i.e. roughly grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor perpendicular with the central axis of steel high-pressure gas cylinder from the direction of polishing pipe ejection.
During actual application, corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor can be also remaining angle with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection, that is, be certain inclination angle but out of plumb with the central axis of steel high-pressure gas cylinder.
In described step 4), the expulsion pressure spraying corresponding mixed liquor to steel high-pressure gas cylinder inner surface from polishing pipe is 20MPa, and polishing pipe rotary speed is 7.5r/min, and the rotary speed of steel high-pressure gas cylinder is 90r/min.
In the present embodiment, in this step 4), when being ground steel high-pressure gas cylinder inner surface processing, being positioned on support by steel high-pressure gas cylinder, making the central axis of steel high-pressure gas cylinder and ground is 15 °, and opening up inclination.
5), cleaning-drying processes for the third time；
Steel high-pressure gas cylinder inner surface is carried out by the distilled water solution using corrosion inhibiter, removing step 4) metal dust that produces, then clean steel high-pressure gas cylinder internal, removing step 4 with tap water) remaining dirt of producing；Then with steam blowing steel high-pressure gas cylinder inner surface, steel high-pressure gas cylinder inner surface is carried out preliminarily dried, finally use constant temperature heating device that steel high-pressure gas cylinder inner surface is carried out drying and processing, remove traces of moisture therein and oil point.
The present embodiment, the mass concentration of the distilled water solution of the corrosion inhibiter described in this step 5) is 5%, and described corrosion inhibiter is sodium molybdate.
The present embodiment, in this step 5), constant temperature heating device carries out the temperature of drying and processing and controls to be 140 DEG C steel high-pressure gas cylinder inner surface.
Embodiment three:
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface, comprises the following steps:
1), cleaning-drying processes: utilize tap water to be carried out the inner surface of steel high-pressure gas cylinder processing, the main corrosion thing removing steel high-pressure gas cylinder inner surface, then the hot blow pipe inserted in steel high-pressure gas cylinder is utilized to be passed through steam, the inside of purging steel high-pressure gas cylinder, steel high-pressure gas cylinder inner surface is dried process, and removes the greasy dirt of steel high-pressure gas cylinder inner surface；
The present embodiment, in this step, hot blow pipe inserts 2/3 of a length of steel high-pressure gas cylinder height in steel high-pressure gas cylinder, and the temperature of steam is 85 DEG C, and during purging, steam pressure is 0.6 MPa, and purge time is 90min.
2), Shot Blasting: high speed shot stream is ejected into the steel high-pressure gas cylinder inner surface that step 1) processed, thus removes oxide layer and the field trash of steel high-pressure gas cylinder inner surface；
The present embodiment, in this step, the speed of high speed shot stream is 10m/s, a diameter of 4mm of shot, and the operating pressure of shot stream is 0.7MPa, and the time of ball blast is 25min.
3), cleaning-drying processes again: use the method for step 1) again to process steel high-pressure gas cylinder inner surface, with removal step 2) dirt that produces；
4), milled processed:
1., corase grind: polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, the corase grind mixed liquor that polishing pipe mixes with lapping liquid to steel high-pressure gas cylinder inner surface jet polishing powder；The present embodiment, in this step, the particle diameter of polishing powder is 80 mesh, and polishing powder and lapping liquid are carried by respective hydraulic pump respectively, both are carrying out the spout ejection of mixing the most polished final pipe after respective hydraulic pump, and in this step, operation hours is 2.5 hours；
2., fine grinding: the present embodiment, in this step, the polishing powder that lapping liquid and particle diameter are 120 mesh is mixed to get fine grinding mixed liquor, this fine grinding mixed liquor is made to transport polishing pipe through a hydraulic pump, 1. the steel high-pressure gas cylinder processed step carries out fine grinding, during fine grinding, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe sprays fine grinding mixed liquor to steel high-pressure gas cylinder inner surface；In this step, operation hours is 5 hours；
3. polishing: the present embodiment, in this step, the polishing powder that lapping liquid and particle diameter are 500 mesh is mixed to get polishing mixed liquor, this polishing mixed liquor is made to transport polishing pipe through a hydraulic pump, 2. the steel high-pressure gas cylinder processed step is polished, during polishing, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe is to steel high-pressure gas cylinder inner surface jet polishing mixed liquor；In this step, operation hours is 25 hours；
The present embodiment, in this step 4), the composition of lapping liquid is: tap water, suspension and rust remover, and the volume proportion of three is: 100:5:2, and described polishing powder is white fused alumina abrasive material.
In this step 4), corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor are preferably the most perpendicular with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection, i.e. roughly grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor perpendicular with the central axis of steel high-pressure gas cylinder from the direction of polishing pipe ejection.
The present embodiment, in this step 4), the expulsion pressure spraying corresponding mixed liquor to steel high-pressure gas cylinder inner surface from polishing pipe is 25MPa, and polishing pipe rotary speed is 10r/min, and the rotary speed of steel high-pressure gas cylinder is 100r/min.
The present embodiment, in this step 4), when being ground steel high-pressure gas cylinder inner surface processing, is positioned over steel high-pressure gas cylinder on support, and making the central axis of steel high-pressure gas cylinder and ground is 20 °, and opening up inclination.
5), cleaning-drying processes for the third time；
Steel high-pressure gas cylinder inner surface is carried out by the distilled water solution using corrosion inhibiter, removing step 4) metal dust that produces, then clean steel high-pressure gas cylinder internal, removing step 4 with tap water) remaining dirt of producing；Then with steam blowing steel high-pressure gas cylinder inner surface, steel high-pressure gas cylinder inner surface is carried out preliminarily dried, finally use constant temperature heating device that steel high-pressure gas cylinder inner surface is carried out drying and processing, remove traces of moisture therein and oil point.
The present embodiment, the mass concentration of the distilled water solution of the corrosion inhibiter described in this step 5) is 6%, and described corrosion inhibiter is sodium molybdate.
The present embodiment, in this step 5), constant temperature heating device carries out the temperature of drying and processing and controls to be 160 DEG C steel high-pressure gas cylinder inner surface.
Claims (10)
1. a high-purity gas processing method for steel high-pressure gas cylinder inner surface, comprises the following steps:
1), cleaning-drying processes: utilize tap water to be carried out the inner surface of steel high-pressure gas cylinder processing, the main corrosion thing removing steel high-pressure gas cylinder inner surface, then the hot blow pipe inserted in steel high-pressure gas cylinder is utilized to be passed through steam, the inside of purging steel high-pressure gas cylinder, steel high-pressure gas cylinder inner surface is dried process, and removes the greasy dirt of steel high-pressure gas cylinder inner surface；
2), Shot Blasting: high speed shot stream is ejected into the steel high-pressure gas cylinder inner surface that step 1) processed, thus removes oxide layer and the field trash of steel high-pressure gas cylinder inner surface；
3), cleaning-drying processes again: use the method for step 1) again to process steel high-pressure gas cylinder inner surface, with removal step 2) dirt that produces；
4), milled processed:
5), cleaning-drying processes for the third time；
It is characterized in that, the milled processed in step 4) includes following three step:
1., corase grind: polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, the corase grind mixed liquor that polishing pipe mixes with lapping liquid to steel high-pressure gas cylinder inner surface jet polishing powder；In this step, the particle diameter of polishing powder is 46-80 mesh, polishing powder and lapping liquid are carried by respective hydraulic pump respectively, and both are carrying out the spout ejection of mixing the most polished final pipe after respective hydraulic pump, and in this step, operation hours is 1.5-2.5 hour；
2., fine grinding: the polishing powder that lapping liquid and particle diameter are 80-120 mesh is mixed to get fine grinding mixed liquor, this fine grinding mixed liquor is made to transport polishing pipe through a hydraulic pump, 1. the steel high-pressure gas cylinder processed step carries out fine grinding, during fine grinding, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe sprays fine grinding mixed liquor to steel high-pressure gas cylinder inner surface；In this step, operation hours is 3-5 hour；
3. polishing: the polishing powder that lapping liquid and particle diameter are 120-500 mesh is mixed to get polishing mixed liquor, this polishing mixed liquor is made to transport polishing pipe through a hydraulic pump, 2. the steel high-pressure gas cylinder processed step is polished, during polishing, polishing pipe is run through along steel high-pressure gas cylinder central axial direction the inside of steel high-pressure gas cylinder, steel high-pressure gas cylinder is made to rotate rotating around own axes with polishing pipe, and both direction of rotation are contrary, meanwhile, polishing pipe is to steel high-pressure gas cylinder inner surface jet polishing mixed liquor；In this step, operation hours is 15-25 hour.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: in described step 4), the composition of lapping liquid is: tap water, suspension and rust remover, and the volume proportion of three is: 100:5:2, and described polishing powder is white fused alumina abrasive material.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: in described step 4), corase grind mixed liquor, fine grinding mixed liquor and polishing mixed liquor are all perpendicular with steel high-pressure gas cylinder inner surface from the direction of polishing pipe ejection.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: in described step 4), the expulsion pressure spraying corresponding mixed liquor to steel high-pressure gas cylinder inner surface from polishing pipe is 15-25MPa, polishing pipe rotary speed is 5-10r/min, and the rotary speed of steel high-pressure gas cylinder is 80-100r/min.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: in described step 4), when being ground steel high-pressure gas cylinder inner surface processing, steel high-pressure gas cylinder is positioned on support, the central axis making steel high-pressure gas cylinder is 10-20 ° with ground, and opening up inclination.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: in described step 1), hot blow pipe inserts the 1/2-2/3 of a length of steel high-pressure gas cylinder height in steel high-pressure gas cylinder, the temperature of steam is 75 DEG C-85 DEG C, during purging, steam pressure is 0.4-0.6 MPa, and purge time is no less than 60min.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that: described step 2) in, the speed of high speed shot stream is 5-10m/s, a diameter of 2-4mm of shot, the operating pressure of shot stream is 0.5-0.7MPa, and the time of ball blast is 15-25min.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 1, it is characterized in that, the method that in step 5), third time cleaning-drying processes is: use the distilled water solution of corrosion inhibiter to be carried out steel high-pressure gas cylinder inner surface, removing step 4) metal dust that produces, steel high-pressure gas cylinder internal, removing step 4 is cleaned again with tap water) remaining dirt of producing；Then with steam blowing steel high-pressure gas cylinder inner surface, steel high-pressure gas cylinder inner surface is carried out preliminarily dried, finally use constant temperature heating device that steel high-pressure gas cylinder inner surface is carried out drying and processing, remove traces of moisture therein and oil point.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 8, it is characterised in that: the mass concentration of the distilled water solution of the corrosion inhibiter described in step 5) is 4%-6%, and described corrosion inhibiter is sodium molybdate.
The processing method of a kind of high-purity gas steel high-pressure gas cylinder inner surface the most according to claim 8, it is characterised in that: in described step 5), constant temperature heating device carries out the temperature of drying and processing and controls as 120-160 DEG C steel high-pressure gas cylinder inner surface.
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