CN108843968B - Aluminum alloy petroleum liquefied gas cylinder body and preparation method thereof - Google Patents
Aluminum alloy petroleum liquefied gas cylinder body and preparation method thereof Download PDFInfo
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- CN108843968B CN108843968B CN201810545430.XA CN201810545430A CN108843968B CN 108843968 B CN108843968 B CN 108843968B CN 201810545430 A CN201810545430 A CN 201810545430A CN 108843968 B CN108843968 B CN 108843968B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/058—Size portable (<30 l)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0648—Alloys or compositions of metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0653—Lead
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2181—Metal working processes, e.g. deep drawing, stamping or cutting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
Abstract
The invention discloses an aluminum alloy liquefied petroleum gas cylinder body and a preparation method thereof. The aluminum alloy liquefied petroleum gas bottle body comprises a handle, a bottle body, a base and a valve, wherein a mounting hole is formed in the top of the bottle body, the valve is arranged on the mounting hole, the handle is arranged on the bottle body outside the valve, the handle is made to surround the valve, the base is arranged at the bottom of the bottle body, the bottle body comprises an upper bottle body and a lower bottle body, the bottle body is formed by butt welding the opening part of the upper bottle body and the opening part of the lower bottle body, the size of the upper bottle body is consistent with that of the lower bottle body, and a valve hole is formed in the top of the. The preparation method of the aluminum alloy petroleum liquefied gas cylinder comprises the steps of A, blank heat treatment, B, blank stamping and stretching, C, bottle body rough blank solution aging treatment, D, semi-finished product bottle body welding assembly, E and finished product bottle body performance detection. The bottle body prepared by the invention has corrosion resistance and high pressure bearing capacity, reduces the manufacturing process of the gas bottle compared with the prior art, improves the production efficiency and reduces the production cost.
Description
Technical Field
The invention belongs to the technical field of production and manufacturing of liquefied petroleum gas cylinders, and particularly relates to an aluminum alloy liquefied petroleum gas cylinder body with long service life, light weight and safety and a preparation method thereof.
Background
Liquefied petroleum gas is a common fuel, and is widely applied to various fields with the advantages of convenience, rapidness and cleanness, and plays an important role in life and production. Accordingly, the development of pressure vessels filled with compressed natural gas is particularly necessary, and due to the flammable and explosive properties of natural gas, the requirement for the gas tightness of the vessels is very high. Poor manufacturing process can cause the wall thickness difference of the container bottle to be too big, the quality difference of the whole gas cylinder is very big, and similarly, if the temperature is not well controlled during the bottom recovery of the hot spinning in the mass production process, the bottom of the gas cylinder leaks gas, and great potential safety hazards are left.
Therefore, the key point for solving the problems is to develop the liquefied petroleum gas cylinder with reasonable design and simple preparation method.
Disclosure of Invention
The invention aims to provide an aluminum alloy liquefied petroleum gas cylinder body and a preparation method of the aluminum alloy liquefied petroleum gas cylinder body.
The first object of the present invention is achieved by: including handle, bottle, base and valve, set up the mounting hole at the top of bottle, set up the valve on the mounting hole, set up the handle on the outside bottle of valve, make the handle semi-surround live the valve, set up the base in the bottom of bottle, the bottle includes bottle, lower bottle, go up the bottle and constitute the bottle with the opening butt welding of lower bottle, the bottle is symmetrical structure setting about the messenger is with lower bottle, and the size of going up bottle and lower bottle is unanimous, the valve opening is seted up at the top of going up the bottle.
The second object of the present invention is achieved by: comprises A, blank heat treatment, B, blank stamping and stretching, C, bottle body rough blank solution aging treatment, D, semi-finished product bottle body welding assembly and E, finished product bottle body performance detection, wherein,
A. blank heat treatment: cutting the raw material into a blank with a wafer-shaped structure, putting the blank into a heating furnace, heating to 200-450 ℃, and keeping the temperature for 30-100 min;
B. blank stamping and stretching: placing the blank between an upper stretching die and a lower stretching die, and stamping and stretching the heated blank by an extrusion head of a hydraulic press by adopting a stamping and stretching method to form a bottle body rough blank (12) with a U-shaped structure;
C. carrying out solution aging treatment on the bottle body rough blank: carrying out solution treatment on the bottle body rough blank at the solution treatment temperature of 520-540 ℃ for 20-45 min, carrying out aging treatment on the finished bottle body after the solution treatment process to obtain a semi-finished bottle body, wherein the aging treatment temperature is 160-180 ℃ and the heat preservation time is 6-12 h, and respectively preparing an upper bottle body and a lower bottle body;
D. opening and closing the upper bottle body: firstly, arranging an installation opening for installing a valve seat at the central part of the sealed end of the upper bottle body, then heating the upper bottle body, and carrying out necking on the installation opening by adopting a spinning machine to the heated upper bottle body through a hot spinning process;
E. and (3) welding and assembling the semi-finished bottle body: firstly, the opening parts of an upper bottle body and a lower bottle body are butted, spliced and welded to enable the upper bottle body and the lower bottle body to be welded into a complete bottle body, then the bottle body is placed in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 hours to carry out stress relief annealing treatment, and the nondestructive flaw detection is carried out on the welding seam of the welding part; finally, installing a base at the bottom of the bottle body, and installing a valve seat, a valve and a handle on an installation opening at the top of the bottle body;
F. and (3) detecting the performance of the finished bottle body: and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of-40-60 ℃.
Compared with the prior art, the invention has the following technical effects:
1. the invention can prepare the bottle body with thinner thickness, and the internal tissue of the bottle body is more compact, light and safe; compared with the traditional liquefied petroleum gas steel cylinder, the steel cylinder has obvious weight reduction effect, does not need spraying on the surface and has obvious environmental protection effect;
2. because the aluminum alloy is easy to generate a layer of compact oxide film on the surface, the oxide film of the aluminum has a series of excellent physical and chemical properties, the corrosion is effectively prevented, the service life of the gas cylinder is prolonged, and the service life of the bottle body is longer;
3. the invention is suitable for preparing 35.5L or less aluminum alloy liquefied gas cylinders, has simple and reliable design, not only reduces the dead weight of the cylinder body, and the bursting pressure can reach more than 6.0Mpa, compared with the traditional liquefied gas cylinder, the invention has higher tolerance pressure and is safer, compared with the prior art, the invention reduces the manufacturing process of the gas cylinder, improves the production and processing efficiency, reduces the production cost, and has good economic benefit and environmental protection benefit.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic drawing of the bottle body stretch processing of the present invention;
reference numbers in the figures: 1~ handle, 2~ bottle, 3~ go up the bottle, 4~ bottle down, 5~ bases, 6~ disk seats, 7~ swing handles, 8~ blanks, 9~ extrusion head, 10~ last drawing die, 11~ lower drawing die, 12~ bottle rough blank.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the invention is not limited in any way, and any alterations or substitutions based on the teaching of the invention are within the scope of the invention.
The aluminum alloy liquefied petroleum gas cylinder body shown in the attached drawing 1 comprises a handle 1, a cylinder body 2, a base 5 and a valve, wherein a mounting hole is formed in the top of the cylinder body 2, the valve is arranged on the mounting hole, the handle 1 is arranged on the cylinder body 2 outside the valve, the valve is semi-surrounded by the handle 1, the base 5 is arranged at the bottom of the cylinder body 2, the cylinder body 2 comprises an upper cylinder body 3 and a lower cylinder body 4, the cylinder body 2 is formed by butt welding the opening parts of the upper cylinder body 3 and the lower cylinder body 4, the upper cylinder body 3 and the lower cylinder body 4 are arranged in a vertical symmetrical structure, the size of the upper cylinder body 3 and the size of the lower cylinder body 4 are consistent, and a valve hole is formed in the top of.
The valve comprises a valve seat 6 and a rotating handle 7, wherein the valve seat 6 is of an inverted T-shaped structure, and the valve seat 6 penetrates out of a valve hole upwards under the matching of a nut, a gasket and a gasket to be arranged on the upper bottle body 3 in a sealing manner.
And the exterior of the valve seat 6 is provided with a thread matched with the nut.
The preparation method of the aluminum alloy petroleum liquefied gas cylinder specifically comprises the following steps:
A. blank heat treatment: cutting the raw material into a blank 8 with a wafer-shaped structure, putting the blank 8 into a heating furnace, heating to 200-450 ℃, and keeping the temperature for 30-100 min;
B. blank stamping and stretching: placing the blank 8 between an upper stretching die 10 and a lower stretching die 11, and stamping and stretching the heated blank into a bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) with a U-shaped structure by adopting a stamping and stretching method through an extrusion head 9 of a hydraulic press;
C. carrying out solution aging treatment on the bottle body rough blank: carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at the temperature of 520-540 ℃ for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4 at the temperature of 160-180 ℃ for 6-12 h;
D. opening and closing the upper bottle body: firstly, a mounting opening for mounting a valve seat 6 is formed in the center of the sealed end of the upper bottle body 3, then the upper bottle body 3 is heated, and the heated upper bottle body 3 is subjected to necking by adopting a spinning machine and a hot spinning process;
E. and (3) welding and assembling the semi-finished bottle body: firstly, the opening parts of an upper bottle body 3 and a lower bottle body 4 are butted, spliced and welded, so that the upper bottle body 3 and the lower bottle body 4 are welded into a complete bottle body 2, then the bottle body 2 is placed in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and the weld joint of the welding part is subjected to nondestructive flaw detection; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
F. and (3) detecting the performance of the finished bottle body: and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of-40-60 ℃.
The diameter of the blank 8 in the step A is 100 mm-700 mm.
And F, the water pressure of the gas cylinder is more than 3.5MPa, the air pressure is more than 2.1MPa, the bursting pressure is not less than 6MPa, the tensile strength of the bottle body material is more than 270MPa, and the elongation is more than 16%.
And E, the thickness of the bottle body of the gas bottle is 3-5 mm, the height of the bottle body is 190-700 mm, and the filling volume of the liquefied petroleum gas is 4.7-35.5 l.
In the step B, the stamping speed of the hydraulic press is 2-6 mm/s, and the stamping pressure is 550-650 kN.
And B, the diameter of the bottle body rough blank 12 in the step B is 200 mm-320 mm, and the depth is 90 mm-275 mm.
The spinning temperature of the hot spinning process in the step D is 200-.
The aluminum alloy petroleum liquefied gas cylinder prepared by machining, welding, heat treatment and performance detection achieves an obvious weight reduction effect, and compared with the traditional steel cylinder, the aluminum alloy petroleum liquefied gas cylinder has the advantages that the service life is prolonged, the aluminum alloy petroleum liquefied gas cylinder is economical and environment-friendly, and the national safety standard is achieved; the design scheme and the preparation method are simple, the preparation cost is low, and the method is economical.
The invention is described in further detail below by way of examples:
the first embodiment is as follows: 1) calculating the size of raw materials required by preparation according to the size of a liquefied petroleum gas bottle to be prepared, and cutting an aluminum alloy round bar ingot blank into a wafer-shaped structural blank 8 with the required thickness according to the calculated size, wherein the diameter of the blank 8 is 100-700 mm;
2) putting the cut blank 8 into a heating furnace with the furnace temperature of 200-450 ℃ to heat for 30-100 min;
3) respectively smearing a lubricant on an extrusion head 9 of an extruder, the outside of a heated blank 8, the inner walls of an upper drawing die 10 and a lower drawing die 11, then placing the blank 8 between the upper drawing die 10 and the lower drawing die 11, enabling the upper drawing die 10 to be matched with the lower drawing die 11 to press the outer edge of the blank 8, then adopting a stamping and drawing method to stamp and draw the central part of the heated blank 8 by pressing down the extrusion head 9 through the extrusion head 9, keeping the extrusion head 9 under the stamping pressure of 550kN and stamping the blank 8 at the speed of 2mm/s, and respectively preparing bottle body rough blanks 12 (namely rough blanks of an upper bottle body 3 and a lower bottle body 4) of the liquefied gas bottle by adopting the method;
4) carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at 520 ℃ for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4 at 160 ℃ for 6-12 h;
5) arranging a mounting opening for mounting a valve seat 6 at the central part of the sealed end of the prepared upper bottle body 3, heating the upper bottle body 3, and performing close-up on the mounting opening of the heated upper bottle body 3 by adopting a spinning machine through a hot spinning process, wherein the spinning temperature of the hot spinning process is 200-280 ℃, the rotating speed of a main shaft is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r;
6) butting, splicing and welding the upper bottle body 3 and the opening part of the closed lower bottle body 4 to enable the upper bottle body 3 and the lower bottle body 4 to be welded into a complete bottle body 2, then placing the bottle body 2 in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and carrying out nondestructive flaw detection on a welding seam of a welding part; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
7) and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of-4 ℃.
Example two: 1) calculating the size of raw materials required by preparation according to the size of a liquefied petroleum gas bottle to be prepared, and cutting an aluminum alloy round bar ingot blank into a wafer-shaped structural blank 8 with the required thickness according to the calculated size, wherein the diameter of the blank 8 is 100-700 mm;
2) putting the cut blank 8 into a heating furnace with the furnace temperature of 200-450 ℃ to heat for 30-100 min;
3) respectively smearing a lubricant on an extrusion head 9 of an extruder, the outside of a heated blank 8, an upper drawing die 10 and the inner wall of a lower drawing die 11, then placing the blank 8 between the upper drawing die 10 and the lower drawing die 11, enabling the upper drawing die 10 to be matched with the lower drawing die 11 to press the outer edge of the blank 8, then adopting a stamping and drawing method to stamp and draw the central part of the heated blank 8 by pressing down the extrusion head 9 through the extrusion head 9, and stamping the blank 8 at the speed of 4mm/s under the stamping pressure of 600kN by the extrusion head 9, thus respectively preparing bottle body rough blanks 12 (namely rough blanks of an upper bottle body 3 and a lower bottle body 4) of the liquefied gas bottle;
4) carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at 530 ℃, and keeping the temperature for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4, wherein the aging treatment temperature is 170 ℃, and the keeping temperature for 6-12 h;
5) arranging a mounting opening for mounting a valve seat 6 at the central part of the sealed end of the prepared upper bottle body 3, heating the upper bottle body 3, and performing close-up on the mounting opening of the heated upper bottle body 3 by adopting a spinning machine through a hot spinning process, wherein the spinning temperature of the hot spinning process is 200-280 ℃, the rotating speed of a main shaft is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r;
6) butting, splicing and welding the upper bottle body 3 and the opening part of the closed lower bottle body 4 to enable the upper bottle body 3 and the lower bottle body 4 to be welded into a complete bottle body 2, then placing the bottle body 2 in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and carrying out nondestructive flaw detection on a welding seam of a welding part; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
7) and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of 0 ℃.
Example three: 1) calculating the size of raw materials required by preparation according to the size of a liquefied petroleum gas bottle to be prepared, and cutting an aluminum alloy round bar ingot blank into a wafer-shaped structural blank 8 with the required thickness according to the calculated size, wherein the diameter of the blank 8 is 100-700 mm;
2) putting the cut blank 8 into a heating furnace with the furnace temperature of 200-450 ℃ to heat for 30-100 min;
3) respectively smearing a lubricant on an extrusion head 9 of an extruder, the outside of a heated blank 8, an upper drawing die 10 and the inner wall of a lower drawing die 11, then placing the blank 8 between the upper drawing die 10 and the lower drawing die 11, enabling the upper drawing die 10 to be matched with the lower drawing die 11 to press the outer edge of the blank 8, then adopting a stamping and drawing method to stamp and draw the central part of the heated blank 8 by pressing down the extrusion head 9 through the extrusion head 9, keeping the extrusion head 9 under the stamping pressure of 650kN, and stamping the blank 8 at the speed of 6mm/s, and respectively preparing bottle body rough blanks 12 (namely rough blanks of an upper bottle body 3 and a lower bottle body 4) of the liquefied gas bottle by adopting the method;
4) carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at 540 ℃ for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4 at 180 ℃ for 6-12 h;
5) arranging a mounting opening for mounting a valve seat 6 at the central part of the sealed end of the prepared upper bottle body 3, heating the upper bottle body 3, and performing close-up on the mounting opening of the heated upper bottle body 3 by adopting a spinning machine through a hot spinning process, wherein the spinning temperature of the hot spinning process is 200-280 ℃, the rotating speed of a main shaft is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r;
6) butting, splicing and welding the upper bottle body 3 and the opening part of the closed lower bottle body 4 to enable the upper bottle body 3 and the lower bottle body 4 to be welded into a complete bottle body 2, then placing the bottle body 2 in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and carrying out nondestructive flaw detection on a welding seam of a welding part; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
7) and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of 60 ℃.
Example four: 1) calculating the size of raw materials required by preparation according to the size of a liquefied petroleum gas bottle to be prepared, and cutting an aluminum alloy round bar ingot blank into a wafer-shaped structural blank 8 with the required thickness according to the calculated size, wherein the diameter of the blank 8 is 100-700 mm;
2) putting the cut blank 8 into a heating furnace with the furnace temperature of 200-450 ℃ to heat for 30-100 min;
3) respectively smearing a lubricant on an extrusion head 9 of an extruder, the outside of a heated blank 8, an upper drawing die 10 and the inner wall of a lower drawing die 11, then placing the blank 8 between the upper drawing die 10 and the lower drawing die 11, enabling the upper drawing die 10 to be matched with the lower drawing die 11 to press the outer edge of the blank 8, then adopting a stamping and drawing method to stamp and draw the central part of the heated blank 8 by pressing down the extrusion head 9, and stamping the blank 8 at the speed of 2mm/s under the stamping pressure of 650kN maintained by the extrusion head 9, thus respectively preparing bottle body rough blanks 12 (namely rough blanks of an upper bottle body 3 and a lower bottle body 4) of the liquefied gas bottle;
4) carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at 540 ℃ for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4 at 180 ℃ for 6-12 h;
5) arranging a mounting opening for mounting a valve seat 6 at the central part of the sealed end of the prepared upper bottle body 3, heating the upper bottle body 3, and performing close-up on the mounting opening of the heated upper bottle body 3 by adopting a spinning machine through a hot spinning process, wherein the spinning temperature of the hot spinning process is 200-280 ℃, the rotating speed of a main shaft is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r;
6) butting, splicing and welding the upper bottle body 3 and the opening part of the closed lower bottle body 4 to enable the upper bottle body 3 and the lower bottle body 4 to be welded into a complete bottle body 2, then placing the bottle body 2 in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and carrying out nondestructive flaw detection on a welding seam of a welding part; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
7) and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of-40-60 ℃.
Example five: 1) calculating the size of raw materials required by preparation according to the size of a liquefied petroleum gas bottle to be prepared, and cutting an aluminum alloy round bar ingot blank into a wafer-shaped structural blank 8 with the required thickness according to the calculated size, wherein the diameter of the blank 8 is 100-700 mm;
2) putting the cut blank 8 into a heating furnace with the furnace temperature of 200-450 ℃ to heat for 30-100 min;
3) respectively smearing a lubricant on an extrusion head 9 of an extruder, the outside of a heated blank 8, the inner walls of an upper drawing die 10 and a lower drawing die 11, then placing the blank 8 between the upper drawing die 10 and the lower drawing die 11, enabling the upper drawing die 10 to be matched with the lower drawing die 11 to press the outer edge of the blank 8, then adopting a stamping and drawing method to stamp and draw the central part of the heated blank 8 by pressing down the extrusion head 9 through the extrusion head 9, keeping the extrusion head 9 at the stamping pressure of 550kN and stamping the blank 8 at the speed of 6mm/s, and respectively preparing bottle body rough blanks 12 (namely rough blanks of an upper bottle body 3 and a lower bottle body 4) of the liquefied gas bottle by adopting the method;
4) carrying out solution treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) at 520 ℃ for 20-45 min, and carrying out aging treatment on the bottle body rough blank 12 (namely rough blanks of the upper bottle body 3 and the lower bottle body 4) after the solution treatment process to obtain the upper bottle body 3 and the lower bottle body 4 at 160 ℃ for 6-12 h;
5) arranging a mounting opening for mounting a valve seat 6 at the central part of the sealed end of the prepared upper bottle body 3, heating the upper bottle body 3, and performing close-up on the mounting opening of the heated upper bottle body 3 by adopting a spinning machine through a hot spinning process, wherein the spinning temperature of the hot spinning process is 200-280 ℃, the rotating speed of a main shaft is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r;
6) butting, splicing and welding the upper bottle body 3 and the opening part of the closed lower bottle body 4 to enable the upper bottle body 3 and the lower bottle body 4 to be welded into a complete bottle body 2, then placing the bottle body 2 in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and carrying out nondestructive flaw detection on a welding seam of a welding part; finally, the bottom of the bottle body 2 is provided with a base 5, and a valve seat 6, a valve and a handle 1 are arranged on an installation opening at the top of the bottle body 2;
7) and (3) respectively detecting the air tightness and the compression resistance of the welded and assembled gas cylinder at the temperature of-40-60 ℃.
Claims (7)
1. A preparation method of an aluminum alloy petroleum liquefied gas cylinder comprises a handle (1), a bottle body (2), a base (5) and a valve, wherein a mounting hole is formed in the top of the bottle body (2), the valve is arranged on the mounting hole, the handle (1) is arranged on the bottle body (2) outside the valve, the valve is semi-surrounded by the handle (1), the base (5) is arranged at the bottom of the bottle body (2), the bottle body (2) comprises an upper bottle body (3) and a lower bottle body (4), the opening parts of the upper bottle body (3) and the lower bottle body (4) are butt-welded to form the bottle body (2), the upper bottle body (3) and the lower bottle body (4) are arranged in an up-down symmetrical structure, the sizes of the upper bottle body (3) and the lower bottle body (4) are consistent, and a valve hole is formed in the top of the upper bottle body (3); the preparation method is characterized by comprising the following steps:
A. blank heat treatment: cutting the raw material into a blank (8) with a wafer-shaped structure, putting the blank (8) into a heating furnace, heating to 200-450 ℃, and keeping the temperature for 30-100 min;
B. blank stamping and stretching: placing a blank (8) between an upper stretching die (10) and a lower stretching die (11), and stamping and stretching the heated blank by an extrusion head (9) of a hydraulic machine to form a bottle rough blank (12) with a U-shaped structure by adopting a stamping and stretching method, wherein the stamping speed of the hydraulic machine is 2-6 mm/s, and the stamping pressure is 550-650 kN;
C. carrying out solution aging treatment on the bottle body rough blank: carrying out solution treatment on the bottle body rough blank (12) at the solution treatment temperature of 520-540 ℃ for 20-45 min, and carrying out aging treatment on the finished bottle body after the solution treatment process to obtain a semi-finished bottle body, wherein the aging treatment temperature is 160-180 ℃ and the heat preservation time is 6-12 h, so as to respectively obtain an upper bottle body (3) and a lower bottle body (4);
D. opening and closing the upper bottle body: firstly, a mounting opening for mounting a valve seat (6) is formed in the central part of the sealed end of the upper bottle body (3), then the upper bottle body (3) is heated, and a spinning machine is adopted to perform a hot spinning process on the heated upper bottle body (3) to close the mounting opening;
E. and (3) welding and assembling the semi-finished bottle body: firstly, the opening parts of an upper bottle body (3) and a lower bottle body (4) are butted, spliced and welded, so that the upper bottle body (3) and the lower bottle body (4) are welded into a complete bottle body (2), then the bottle body (2) is placed in an environment with the temperature of 240-260 ℃ for heat preservation for 1-2 h for stress relief annealing treatment, and the weld joint of the welding part is subjected to nondestructive flaw detection; finally, a base (5) is arranged at the bottom of the bottle body (2), and a valve seat (6), a valve and a handle (1) are arranged on an installation opening at the top of the bottle body (2);
F. and (3) detecting the performance of the finished bottle body: the gas cylinder assembled by welding is placed in an environment with the temperature of-40-60 ℃ for gas tightness and pressure resistance detection, the thickness of a cylinder body (2) of the gas cylinder is 3-5 mm, the height of the cylinder body is 190-700 mm, and the volume of filled liquefied petroleum gas is 4.7-35.5L; the water pressure of the gas cylinder is more than 3.5MPa, the air pressure is more than 2.1MPa, the bursting pressure is not less than 6MPa, the tensile strength of the material of the bottle body (2) is more than 270MPa, and the elongation is more than 16%.
2. The preparation method according to claim 1, characterized in that the valve comprises a valve seat (6) and a rotary handle (7), the valve seat (6) is in an inverted T-shaped structure, and the valve seat (6) penetrates through the valve hole upwards under the matching of a nut, a gasket and is arranged on the upper bottle body (3) in a sealing manner.
3. Method for preparing according to claim 1 or 2, characterized in that the valve seat (6) is externally provided with a thread adapted to a nut.
4. The method according to claim 1, wherein the diameter of the billet (8) in the step A is 100mm to 700 mm.
5. The method according to claim 1, wherein the diameter of the bottle body preform (12) in step B is 200mm to 320mm, and the depth thereof is 90mm to 275 mm.
6. The method according to claim 1, wherein the spinning temperature of the hot spinning process in the step D is 200-280 ℃, the spindle rotation speed is 70-100r/min, and the feeding ratio is 0.7-1.0 mm/r.
7. An aluminum alloy liquefied petroleum gas cylinder produced by the production method according to claim 1.
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| CN111271590A (en) * | 2020-02-08 | 2020-06-12 | 王广武 | Multilayer gas storage bottle and manufacturing method thereof |
| CN112692089A (en) * | 2020-12-28 | 2021-04-23 | 滁州沃博自动化科技有限公司 | Valve seat of aluminum vehicle-mounted pendulum oil-free air compressor and manufacturing method thereof |
| CN113290352B (en) * | 2021-05-27 | 2022-08-05 | 季火松 | Natural gas cylinder liner and one-time stretching seamless forming method thereof |
| CN113857797A (en) * | 2021-12-02 | 2021-12-31 | 宁波和升铝瓶技术有限公司 | Preparation method of aluminum alloy seamless gas cylinder |
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| GB1546849A (en) * | 1976-09-15 | 1979-05-31 | British Aluminium Co Ltd | Method of making metal containers |
| JPH0663681A (en) * | 1992-08-12 | 1994-03-08 | Furukawa Alum Co Ltd | Manufacture of aluminum alloy-made seamless small high pressure gas vessel |
| CN101975272A (en) * | 2010-09-29 | 2011-02-16 | 沈阳斯林达安科新技术有限公司 | Aluminium alloy seamless liner and production technology thereof |
| CN102011933A (en) * | 2010-09-29 | 2011-04-13 | 沈阳斯林达安科新技术有限公司 | Hydrogen aluminum alloy inner container carbon fiber fully-winding gas cylinder for vehicle and production process thereof |
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| CN104972014A (en) * | 2015-06-30 | 2015-10-14 | 柳州市山泰气体有限公司 | Liquefied gas bottle forming technology |
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