CN110640042A - Gas storage cylinder processing method - Google Patents
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- CN110640042A CN110640042A CN201910912994.7A CN201910912994A CN110640042A CN 110640042 A CN110640042 A CN 110640042A CN 201910912994 A CN201910912994 A CN 201910912994A CN 110640042 A CN110640042 A CN 110640042A
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- 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
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Abstract
The invention discloses a processing method of a gas storage bottle, which belongs to the technical field of high-pressure gas storage bottles and comprises the following steps: stamping and deep-drawing the aluminum material for multiple times to form a cup-shaped body with one closed end and one opened end; the cup-shaped body is closed by strong rotation to form an inner container with a bottle mouth end sealing head, an inner container barrel and a tail plug end sealing head; in the process of strong rotation, the average thickness of the liner cylinder is less than or equal to 1.5 mm. The gas storage bottle produced by the method ensures that the inner container is as light as possible, and improves the gas storage density per unit weight.
Description
Technical Field
The invention relates to the technical field of high-pressure gas storage bottles, in particular to a gas storage bottle processing method.
Background
The gas cylinder is a storage device for fuel gas in the fuel cell. The gas storage capacity of the gas cylinder directly determines the cruising ability of the fuel cell. The gas-containing capacity of the gas cylinder is directly related to the gas cylinder processing method.
The existing gas cylinder processing method directly adopts aluminum plate punching and drawing for forming, does not accurately limit the thickness and the volume of the gas cylinder, and enables the gas holding capacity of the gas cylinder to be incapable of being increased all the time.
In order to increase the gas storage density per unit weight of the gas cylinder and to enable the gas cylinder to store more fuel gas, a new processing method is required.
Disclosure of Invention
The invention aims to provide a processing method capable of processing a gas cylinder with higher gas storage density per unit weight.
A gas cylinder processing method comprises the following steps:
stamping and deep-drawing the aluminum material for multiple times to form a cup-shaped body with one closed end and one opened end;
the cup-shaped body is closed by strong rotation to form an inner container with a bottle mouth end sealing head, an inner container barrel and a tail plug end sealing head;
in the process of strong rotation, the average thickness of the liner cylinder is less than or equal to 1.5 mm.
The scheme has the advantages that:
when the inner container is manufactured, in the process of strong rotation, the average thickness of the inner container barrel is smaller than or equal to 1.5mm by monitoring the thickness of the inner container barrel, so that the inner container is made as thin as possible, the light weight of the inner container can be ensured as far as possible, and the gas storage density of unit weight is improved. Make when loading the gas of same quality, the weight of whole gas bomb is lighter, more is favorable to user equipment such as unmanned aerial vehicle, car to carry on.
Further, in the drawing process, through three times of drawing, the closed end of the cup-shaped body is drawn to form a tail plug end socket, and the part between the closed end and the open end is drawn to form the liner barrel.
Through three times of deep drawing, the cup-shaped body formed by deep drawing of the aluminum material has enough length, the original closed end is deep drawn to form a tail plug end sealing head, the part between the closed end and the open end is deep drawn to form a liner barrel, and the liner barrel has certain length and can continue processing operation at the back.
Further, in the process of drawing and strong spinning closing, the wall thickness of the inner container barrel is gradually thinned from two ends to the middle.
The purpose of thinning the whole inner container is achieved by thinning the inner container barrel, so that the inner container is lighter on the premise of meeting the gas containing requirement, and the storage density of fuel gas under the unit weight is increased.
Further, in the strong rotation closing process, the opening end of the cup-shaped body is gradually folded to form a bottle mouth end sealing head with a bottle mouth end; the bottle mouth end sealing head forms a bottle mouth end curved surface connected between the bottle mouth end and the liner cylinder body, and the depth of the bottle mouth end curved surface is the depth of the front sealing head.
In the process of strong spinning closing-in, the opening end of the original cup-shaped body can be folded to form the bottle opening end by forming the bottle opening end curved surface, and the depth of the bottle opening end curved surface is the distance between two end parts of the curved surface of the bottle opening end and the distance between the end parts, close to each other, of the bottle opening end and the inner container barrel and can be used for expressing the bending degree of the curved surface of the bottle opening end.
Furthermore, a tail plug end curved surface is integrally formed between the tail plug end seal head and the liner cylinder body; the depth of the tail plug end curved surface is the depth of the rear end socket; the depth of the rear end socket is equal to that of the front end socket.
The depth of the curved surface of the tail plug end is the distance between the end parts of the tail plug end seal head and the liner cylinder body which are close to each other. The depth of the curved surface of the tail plug end is the same as the depth of the curved surface of the bottle mouth end, the depth of the curved surface of the tail plug end also represents the complete degree of the curved surface of the tail plug end, and the depth of the curved surface of the tail plug end is equal to the depth of the curved surface of the bottle mouth end, which indicates that.
And a tail plug end is arranged at a sealing end formed in the drawing process.
The tail plug end is installed, so that the tail plug end is convenient to connect and install with equipment such as a forced spinner, and further processing is convenient to the cup-shaped body, an inner container and an air storage bottle which are formed behind the cup-shaped body after the cup-shaped body is fixed.
Furthermore, in the deep drawing and strong spinning processes, the average diameter of the liner cylinder is respectively greater than the depth of the front seal head and the depth of the rear seal head.
The size of the inner container is designed, then the inner container is processed according to the design, and the shape and the structure of the processed inner container are limited according to the size relationship between the diameter of the inner container barrel and the depth of the front end enclosure and the depth of the rear end enclosure. Furthermore, after the closing process, the ratio of the depth of the front end enclosure to the depth of the rear end enclosure to the average diameter of the cylinder body of the inner container is less than or equal to 0.3.
In the closing-in process, the whole inner container is of a flat structure with a larger average diameter, so that the effective volume of the inner container is increased, the capacity of fuel gas is increased, and the storage density of the fuel gas in unit weight is increased under the condition that the total length of the inner container is not changed.
Furthermore, in the process of strong rotation, the wall thickness of part of the inner container barrel is thinned to 1.2 mm.
The part position thickness of inner bag barrel can reach 1.2 millimeters minimum, compares in present most minimum gas bomb that can only accomplish 1.5 millimeters thickness, and the gas bomb in this scheme has further carried out the attenuate to the inner bag, can be under the prerequisite that holds the same amount fuel gas, makes the whole weight of gas bomb lighter, improves the gaseous memory space of unit weight fuel.
Further, the necking process is carried out at a temperature of 420-450 ℃.
At the temperature, the ductility of the aluminum product is improved after the aluminum product is heated, and the aluminum product is more convenient to close.
Further, the strong spinning and necking process is performed at a rotation speed of 550 and 650 rpm.
Under the rotating speed, the thinning of the liner cylinder body and the closing of the bottle mouth end are facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a processed gas cylinder according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a valve in a gas cylinder processed and formed according to the second embodiment of the invention.
Fig. 3 is a bottom view of fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: lightweight shell 10, inner container 11, end closure 21, end closure end 211, mouth end closure 22, mouth end 221, first diameter R1, second diameter R2, third diameter R3, first axial length D1, second axial length D2, third axial length D3, closure depth H1, second depth H2, third depth H3, valve 100, cover top 110, cover wall 112, knob 120, enclosure 130, sealing ring 132, connecting cavity 140, expansion port 142, support seat 150, sealing strip 152.
Example one
An embodiment substantially as shown in figure 1: the gas storage bottle produced by the processing method of the embodiment comprises an inner container 11 and a light shell 10 which is tightly attached to the inner container 11 and wrapped on the inner container 11. The liner 11 includes a tail plug end closure 21 and a bottle mouth end closure 22.
The tail plug end 211 which extends outwards and penetrates through the light shell 10 is welded at the central position of the tail plug end head 21. The tail plug end 211 is coaxial with the inner container 11, a connector is arranged on the tail plug end 211 in the outward direction, the tail plug end 211 can be connected with other fixing structures through the connector, and the whole gas storage bottle is convenient to fix.
The center of the bottle mouth end closure 22 is communicated with a tubular bottle mouth end 221 which extends outwards. Finish end 221 is coaxial with bladder 11 and tail plug end 211.
The central point O of the axis of the inner container 11 is the center of gravity of the inner container, the cross section of the inner container 11 passing through the central point O and perpendicular to the axis is a dividing plane, as shown in fig. 1, the shapes and sizes of the inner container 11 (excluding the bottle opening end 221) and the light shell 10 on both sides of the dividing plane are symmetrical relative to the dividing plane. The liner cylinder body of the liner 11 connected between the end socket 22 of the bottle mouth and the end socket 21 of the tail plug can be divided into at least four cylindrical structures, the cylindrical structure connected with the end socket part (including the end socket 22 of the bottle mouth and the end socket 21 of the tail plug) is called a second cylinder, the length of the cylindrical structure is the second depth H2, the cylindrical structure connected with the second cylinder is called a third cylinder, the length of the cylindrical structure is the third depth H3, the second cylinder and the third cylinder are symmetrically connected with the same cylindrical structure relative to an interface, namely, the end socket 21 of the tail plug, the second cylinder, the third cylinder, the second cylinder and the end socket 22 of the bottle mouth are sequentially connected to form the liner 11. The end sockets (including the bottle mouth end socket 22 and the tail plug end socket 21) are connected with a bottle mouth end curved surface and a tail plug end curved surface between the liner cylinder body respectively, the distances between the two end parts of the bottle mouth end curved surface and the tail plug end curved surface are the same and are respectively called as the depth of a front end socket and the depth of a rear end socket, and the depths of the two end sockets are both H1. 2 (H1+ H2+ H3) ═ D1, D1 is the axial length of the portion of the bladder 11 excluding the mouth end 221, and is referred to as the first axial length D1.
The average diameter of the inner part of the inner container cylinder part is a first diameter R1, the average diameter of the outer part of the inner container cylinder part is a second diameter R2, the average diameter of the structure outer part of the light shell 10 corresponding to the inner container cylinder part is a third diameter R3, and then the average thickness of the inner container cylinder part is (R2-R1)/2 which is less than or equal to 1.5 mm.
Wherein the average thickness of the third cylinder (i.e. the average thickness of the cylinder wall of the inner container in the length H3) is less than the average thickness of the second cylinder (i.e. the average thickness of the cylinder wall of the inner container in the length H2). Wherein, the wall thickness of the third cylinder can be 1.2mm at the thinnest. Compared with the existing gas storage cylinder, the wall thickness of the gas storage cylinder is usually more than 1.5mm, the high-pressure hydrogen storage cylinder produced by the scheme can ensure that the mass of the inner container 11 becomes lighter, the effective volume is larger, namely, the hydrogen storage density per unit weight is higher, and the hydrogen storage density per unit weight in the embodiment is all more than 7.5 percent.
The light shell 10 is a bag-shaped structure which is wrapped on the outer surface of the inner container 11 and is matched with the shape of the inner container 11. The lightweight shell 10, like the liner 11, also has a closure end closure 21 and a finish end closure 22, and a shell barrel portion connected between the finish end closure 22 and the closure end closure 21. The light housing 10 in this embodiment is formed by winding a carbon fiber-epoxy composite material wound according to a certain rule and then coating resin on the carbon fiber-epoxy composite material.
The distance between the bottle mouth end seal head 22 of the inner container 11 and the end part of the outer surface of the tail plug end seal head 21 is the second axial length D2, and the average thickness of the bottle mouth end seal head 22 and the tail plug end seal head 21 of the inner container 11 is (D2-D1)/2. (D2-D1)/2 is more than or equal to 1.5 mm.
The distance between the bottle mouth end closure 22 and the end part of the outer surface of the end closure 21 of the light-weight shell 10 is a third axial length D3, and the average thickness of the bottle mouth end closure 22 and the end closure 21 of the light-weight shell 10 is (D3-D2)/2. (D3-D2)/2 is more than or equal to 1.5 mm.
The distance between the end socket 22 at the end of the cylinder end and the end socket 21 at the end of the tail plug and the second cylinder is equal to the end socket depth H1, so that the gas storage cylinder has the lightest weight on the premise of the same effective volume, when the inner container 11 is manufactured, H1/R1 is less than or equal to 0.3, and when H1/R1 is 0.3, the inner container 11 holds the hydrogen with the same mass, and the whole gas cylinder is lightest.
The weight-volume ratio of the gas cylinder is more than 0.28 and less than or equal to 0.43. In this embodiment, the gas cylinder has a weight-to-volume ratio of 0.292. Compare in prior art, the gas bomb lightweight that this embodiment processing formed, the weight-to-volume ratio is littleer, is favorable to fuel cell's continuation of the journey more, is favorable to unmanned aerial vehicle etc. to the comparatively strict application environment of fuel cell weight requirement use.
The gas bomb in this embodiment not only can use on unmanned aerial vehicle, also can use in application environment such as motorcycle, open-air camping.
The specific implementation process is as follows:
first, the inner container 11 is manufactured.
In this embodiment, an aluminum inner container is adopted: the aluminum plate of the polished cylinder is placed on a drawing die, and the aluminum plate is punched and cold drawn into a cup-shaped body through the drawing die, wherein the cup-shaped body comprises a tail plug end sealing head 21 and a liner barrel body integrally formed with the tail plug end sealing head 21. The inner container barrel is subjected to three times of deep drawing to form a structure with a thin middle part and two thick ends.
The cup-shaped body is placed on a strong rotation device, the cup-shaped body is closed after being thinned through strong rotation, the inner container barrel body of the cup-shaped body is sequentially drawn and strong rotated in the strong rotation process to form an integrally formed cylindrical structure formed by sequentially connecting a second cylinder, a third cylinder and the second cylinder, wherein the wall thickness of the third cylinder is smaller than that of the second cylinder.
After the wall thickness of each part in the liner cylinder body reaches the requirement (namely the average thickness of the liner cylinder body of the liner 11 is (R2-R1)/2 is less than or equal to 1.5mm), the opening end of the cup-shaped cylindrical structure is processed into the bottle mouth end sealing head 22 only leaving the installation position of the bottle mouth end 221 in a spinning closing mode. And the tail plug end 211 is arranged at the center of the closed end of the tail plug end sealing head 21, and the liner 11 is conveniently connected with other processing equipment in the later processing process by arranging the tail plug end 211. The inner container 11 is made into an aluminum inner container with a bottle mouth end sealing head 22 and a tail plug end sealing head 21 at two ends.
When the strong spin closing is performed, the operation is performed at a temperature of 420-.
After the aluminum inner container 11 is formed, heat treatment is required: and (3) putting the aluminum inner container 11 into a heating furnace, heating to 550 ℃, preserving heat for 80 minutes, carrying out solid solution, preserving heat for 300 minutes at 175 ℃ and carrying out aging treatment.
After the aluminum inner container is machined and formed, straight threads meeting the requirements of size and precision are machined on the aluminum inner container by using a numerical control lathe.
The inner surface of the aluminum inner container is polished, a mechanical polishing mode is selected, small-particle abrasive and grinding fluid are mixed and then are filled into the inner cavity of the aluminum inner container, and the inner surface of the aluminum inner container is polished comprehensively through rotation at the inner wall of the gas cylinder at a certain rotating speed.
Then, the lightweight case 10 is manufactured.
Firstly, manufacturing and winding layers; winding a carbon fiber-epoxy system composite material on the inner container 11: and winding the carbon fiber-epoxy system composite material on the aluminum inner container 11 manufactured in the previous step along the outer wall of the aluminum inner container in a mode of annular winding and spiral winding in a crossed and overlapped mode to form a winding layer, so as to obtain a semi-finished product of the gas storage bottle. The average thickness of the wound layer was B1.
Next, a photocurable resin layer was applied: and uniformly coating the outer surface of the winding layer of the semi-finished gas cylinder with the photocuring resin, and putting the semi-finished gas cylinder coated with the photocuring resin into the existing photocuring device to be irradiated by ultraviolet rays until the curing is finished. The average thickness of the photocurable resin layer was B2.
The average thickness of the light shell 10 is B1+ B2, wherein (R3-R2)/2 is not less than B1+ B2 is not less than (D3-D2)/2. Wherein, the ratio of (R3-R2)/2 is less than or equal to 1.2mm and less than or equal to 1.5mm, and the ratio of (D3-D2)/2 is less than or equal to 1.5 mm.
The specific winding mode of the carbon fiber-epoxy system composite material is as follows: firstly, the aluminum inner container 11 is cantilever-mounted on a tool of a winding machine through the tail plug end 211, after the carbon fiber-epoxy system composite material is impregnated in a resin matrix, a certain tension is preset, and then the carbon fiber-epoxy system composite material is wound on the outer wall of the aluminum inner container 11 in a mode of annular winding and spiral winding and cross overlapping.
The aluminum inner container needs to be cured after being wound with the carbon fiber-epoxy system composite material, and the specific curing mode is as follows: putting the aluminum inner container wound with the carbon fiber-epoxy system composite material into a continuous curing furnace, keeping the aluminum inner container to rotate horizontally, firstly heating to 80-110 ℃, then heating to 22-130-140 ℃, curing for 4.5-6.5 h, and discharging after the furnace temperature is reduced to below 60 ℃.
Example two
The present embodiment differs from the first embodiment in that the gas cylinder has a mouth and a valve 100 for closing the mouth. As shown in fig. 2, the valve 100 includes a circular cap top 110 and a cap wall 112 integrally formed with the cap top 110 in a ring structure, and a knob 120 for adjusting the tightness of the valve 100 is inserted into the valve 100 through a hole formed in the cap wall 112. An enclosure 130 is integrally formed and attached below the cover wall 112. A lid base is mounted between the enclosure 130 and the lid wall 112. The cover bottom is the same shape as the cover top 110. The knob 120 is welded with a screw rod extending between the cover top 110 and the cover bottom. The end of the screw that extends into the valve 100 is coupled to a cam assembly comprising a plurality of cams that allow the rotation of the knob 120 to move the cover top 110 and the cover bottom toward and away from each other and thus move the cover bottom up and down along the cover wall 112 relative to the cover top 110.
The contact position of the cover bottom and the cover wall 112 is integrally formed with an outward protrusion, the inner side surface of the cover wall 112 is vertically provided with a plurality of grooves corresponding to the protrusions one to one aiming at the protrusion of the cover bottom, so that the cover bottom and the cover wall 112 are convenient to connect, and the protrusions vertically slide along the grooves.
As shown in fig. 3, two supporting seats 150 are installed on the bottom surface of the cap bottom, and the supporting seats 150 of the cap bottom are closer to the mouth of the gas cylinder by the adjusting knob 120, so as to enhance the contact strength between the cap bottom and the mouth of the gas cylinder, and to seal the mouth of the gas cylinder. Meanwhile, due to the adjusting knob, a certain space can exist between the bottom of the cap and the opening of the gas storage bottle in the valve 100, and the purpose of adjusting the pressure of the gas storage bottle is achieved.
The enclosure 130 is obliquely arranged, the top end of the enclosure 130 is integrally formed and seamlessly connected with the cover wall 112, and the bottom end of the enclosure 130 is hermetically welded with a sealing ring 132 for bonding with the light shell of the gas cylinder. When the valve 100 is used, when the valve 100 is covered on the mouth part of the gas cylinder, the cover bottom is contacted with the mouth through the adjusting knob 120, the enclosure 130 is tightly attached to the curved surface part of the seal head of the gas cylinder, and the sealing space can be formed between the whole valve 100 and the gas cylinder through the sealing ring 132.
To increase the sealing between the valve 100 and the gas cylinder, a sealing strip 152 of the same material as the sealing ring is attached to the inner surface of the enclosure 130. The enclosure 130 can be tightly connected with the light shell of the gas cylinder through the sealing ring 132 and the sealing strip 152. In this embodiment, the sealing ring 132, the sealing strip 152 and the supporting seat 150 are made of soft materials with certain viscosity, such as rubber and gel.
In addition, still weld on one side of enclosing cover 130 and have connecting chamber 140, have the space that can hold gas between connecting chamber 140 and the enclosing cover 130, connect chamber 140 and enclose and cover 130 between communicate through an air cock. The outside of the connecting cavity 140 is provided with an expansion port 142 for communicating other pipes with the air tap. The air tap structure is the existing one, namely the device for connecting the existing common air storage cylinder with other air tap structures, and is not described herein again.
When the special gas bomb for the unmanned aerial vehicle is processed, when the processing of the inner container 11 is completed, the diameters of the top 110 and the bottom of the cover are determined according to the diameter of the bottle mouth end 221, and meanwhile, the shape of the enclosure 130 is determined according to the diameter and the curvature of the curved surface of the end socket 22 of the bottle mouth end of the inner container 11. After these parameters are determined, a mold is made and poured to form the connection of the cap top 110, cap wall 112 and enclosure 130. Then, a mold for the cover bottom is made, the diameter of the cover bottom is the same as that of the cover top 110, a plurality of uniformly distributed protrusions extend outwards from the cover bottom, and a plurality of grooves corresponding to the protrusions of the cover bottom one by one are formed in the inner side surface of the cover wall 112.
Before the bottom is covered, two symmetrical holes are arranged on the side wall of the enclosure 130, one is used for inserting a screw rod for welding a knob, and the other is provided with an air nozzle communicated with the connecting cavity 140. A cam set comprising a plurality of cams is mounted on the end of the screw that extends into the valve 100, so that the rotation of the knob 120 in one direction gradually changes the tendency of the cams toward one side length or toward a shorter length. After the cam pack is installed, the cover bottom is snapped into the groove of the cover wall 112 by the protrusion, and then an annular stop is welded between the cover wall 112 and the enclosure 130 to prevent the cover bottom from sliding out of the groove. Two U-shaped supporting seats 150 are welded at the position of the bottom surface of the cover bottom close to the bottle mouth, so that the bottle mouth can be tightly clamped. A connection cavity 140 for wrapping the air cap is then welded around the air cap. The connecting cavity 140 is also manufactured by a mold, and an expansion opening 142 is formed at the outer side of the connecting cavity 140.
EXAMPLE III
The difference between this embodiment and the second embodiment is that a sealed pressure relief chamber is installed in the connection chamber 140, and nitrogen gas is stored in the pressure relief chamber. The pressure relief cavity is mounted between enclosure 130 and inflation port 142. If the gas cylinder leaks, opening the pressure relief chamber allows the flammable gas, such as hydrogen, to react with the nitrogen before leaking out of the expansion port 142. An air valve used for communicating the pressure relief cavity with the enclosure 130 is arranged at the contact position between the pressure relief cavity and the enclosure 130, the air valve structure is the existing one, and the space enclosed by the pressure relief cavity and the enclosure 130 can be communicated by opening the air valve. Directly at the high-pressure storage nitrogen gas of pressure release intracavity, can effectively alleviate the adverse effect that hydrogen revealed and bring through the neutralization reaction of hydrogen and nitrogen gas, avoid appearing the explosion accident. Before the connection cavity 140 is installed, a gas valve needs to be installed at the connection cavity and the enclosure 130, and then a compression bag in which nitrogen is stored in advance is placed at a position, close to the enclosure 130, of the connection cavity 140 which is separated out separately to form a pressure relief cavity, so that the pressure relief cavity can be communicated with the gas valve.
Example four
The difference between the embodiment and the first embodiment is that the bottle mouth end sealing head 22 and the tail plug end sealing head 21 of the aluminum liner are turned after being formed, the original position of the reserved rotary wheel is changed into a turning tool by modifying a spinning closing-in machine, the deviation caused by secondary positioning is reduced, the turning track is consistent with the closing-in track, the shapes of the front sealing head and the rear sealing head are ensured, and the consistency and the stability of the wall thickness of the front sealing head and the rear sealing head of the liner are ensured.
EXAMPLE five
In the embodiment, the air cylinder is wound in the circumferential direction, and the inclination between the air cylinder and the cross section of the air cylinder is 1-2 degrees; the inclination of the spiral winding and the longitudinal section of the gas storage cylinder is 5-35 degrees, and the pitch of the spiral winding is less than one percent of the length of the liner 11, namely the pitch of the spiral winding is less than or equal to D2/100. The helical winding is inclined in the opposite direction to the longitudinal winding. The cross section of the gas cylinder refers to a section which passes through the center of the gas cylinder and has an oval outline; the longitudinal section of the gas cylinder refers to a section which passes through the center of the gas cylinder and is circular in outline.
The descriptions in the above embodiments and the like can be used to explain the contents of the claims.
Claims (10)
1. A gas bomb processing method is characterized in that: the method comprises the following steps:
stamping and deep-drawing the aluminum material for multiple times to form a cup-shaped body with one closed end and one opened end;
the cup-shaped body is closed by strong rotation to form an inner container with a bottle mouth end sealing head, an inner container barrel and a tail plug end sealing head;
in the process of strong rotation, the average thickness of the liner cylinder is less than or equal to 1.5 mm.
2. The method of claim 1, wherein: in the drawing process, the closed end of the cup-shaped body is drawn to form a tail plug end socket through three times of drawing, and the part between the closed end and the open end is drawn to form the liner barrel.
3. The method of claim 2, wherein: in the process of deep drawing and strong spinning closing up, the wall thickness of the inner container barrel is gradually thinned from two ends to the middle.
4. The method of claim 1, wherein: in the strong rotation closing process, the opening end of the cup-shaped body is gradually folded to form a bottle mouth end sealing head with a bottle mouth end; the bottle mouth end sealing head forms a bottle mouth end curved surface connected between the bottle mouth end and the liner cylinder body, and the depth of the bottle mouth end curved surface is the depth of the front sealing head.
5. The method of claim 4, wherein: a tail plug end curved surface is integrally formed between the tail plug end seal head and the liner cylinder body; the depth of the tail plug end curved surface is the depth of the rear end socket; the depth of the rear end socket is equal to that of the front end socket.
6. The method of claim 5, wherein: in the deep drawing and strong spinning processes, the average diameter of the liner cylinder is respectively greater than the depth of the front seal head and the depth of the rear seal head.
7. The method of claim 6, wherein: after the closing process, the ratio of the depth of the front end enclosure to the depth of the rear end enclosure to the average diameter of the liner cylinder is less than or equal to 0.3.
8. The method of claim 7, wherein: in the process of strong rotation, the wall thickness of part of the inner container barrel is thinned to 1.2 mm.
9. The method of claim 1, wherein: the closing process is carried out at a temperature of 420-450 ℃.
10. The method of claim 9, wherein: the strong rotation and closing process is carried out at the rotation speed of 550-650 rpm.
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