CN114392506A - Onboard thin-wall storage tank and manufacturing method thereof - Google Patents
Onboard thin-wall storage tank and manufacturing method thereof Download PDFInfo
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- CN114392506A CN114392506A CN202210058671.8A CN202210058671A CN114392506A CN 114392506 A CN114392506 A CN 114392506A CN 202210058671 A CN202210058671 A CN 202210058671A CN 114392506 A CN114392506 A CN 114392506A
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- 238000003466 welding Methods 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 10
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- 238000002347 injection Methods 0.000 claims description 4
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- 238000003754 machining Methods 0.000 claims description 4
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
- A62C3/0228—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires with delivery of fire extinguishing material by air or aircraft
- A62C3/0235—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires with delivery of fire extinguishing material by air or aircraft by means of containers, e.g. buckets
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
- A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Biodiversity & Conservation Biology (AREA)
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- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an onboard thin-wall storage tank and a manufacturing method thereof.A storage tank main body is composed of an upper tank body and a lower tank body, wherein a middle partition plate is arranged in the upper tank body, so that liquid in the original storage tank is divided into three parts by impact to weaken impact energy. The friction stir welding method is adopted to weld the box body in a splicing mode, all sealing welding seams need to be welded thoroughly, the thickness of a welding seam joint needs to be larger than 2.2mm, and the strength and the sealing performance of the box wall need to be guaranteed. Because the storage tank fixed point is at the bottom, belongs to cantilever structure, and in impact and vibration process, the first half shock displacement of whole storage tank is some big, and the storage tank is divided into two parts in the first half, has reduced the influence of liquid impact to the storage tank to a great extent.
Description
Technical Field
The invention relates to the technical field of aviation, in particular to an airborne thin-wall storage tank and a manufacturing method thereof.
Background
The airborne thin-wall storage tank is a main part in a fire extinguishing system of a large-scale seaplane, has the function of storing liquid fire extinguishing agent, and simultaneously needs to meet the light-weight requirement of a main engine plant and reduce the counter weight of the plane.
Fig. 1 to 6 show an onboard thin-wall storage tank of the prior art. The storage tank main body comprises top head 1, box 2, bottom head 3, prevent shaking board 4, wherein prevent shaking board 5 as box additional strengthening. The top end enclosure is provided with a liquid level rod 6, a liquid feeding port cover 7 and a pressure balancing device 8. The box body is provided with a liquid supply connector 9 and a handle 10, and the bottom seal head is provided with a cleaning connector. The medicament enters through a liquid filling opening of the top seal head and then enters a pipeline from the liquid supply joint through the pump body to supply liquid.
The onboard thin-wall storage tank is formed by assembling and welding a top seal head, a bottom seal head and a top seal head into a closed storage tank. In the use process of the product, if the interior of the product fails and cannot be repaired, the product is only returned to the factory for integral replacement, and the maintenance cost of subsequent use of a client is increased. The pressure balancing device adopts a ventilation structure, the inside of the pressure balancing device is provided with filtering foam, but when the aircraft inclines for a long time at a large angle, the sealing performance is poor.
In the manufacturing process of the onboard thin-wall storage box, the box body is formed by 2mm aluminum alloy plates and then is sealed into a rectangular cylinder by a longitudinal welding line. Because the plate is thin, the deformation of the formed box body is large. And after the box body is formed, the box body is assembled and welded with the bottom end enclosure, and the welding line is a circumferential welding line. And then the anti-shaking plates are placed into the box body at intervals and are welded and fixed with the inner bottom surface of the bottom end enclosure and the two side surfaces in the box body. And finally, welding and fixing the top end socket and the top of the box body to form a closed storage box. The bottom end socket and the top end socket are machined and formed by thick plate machines, the wall thickness is 2mm, the thin wall deforms after the end socket is formed, and the material and machining cost is high. The welding modes all adopt gas shielded welding, and because the main body is an aluminum alloy thin-wall part, the deformation of the box walls near all welding seams is large, and the outer surfaces of the box walls are uneven. The anti-shaking plates are shrunk and deformed after being welded, the two side walls of the box body are pulled towards the center, and the volume deviation of the box body is overlarge. The quality grade of the longitudinal and circumferential welding seams of the box body as the sealing welding seam needs to meet the requirement of a secondary welding seam, but due to the deformation problem, the welding difficulty is high, and the welding seam qualification rate is low. Thus, the manufacturing cost of the storage tank is improved, and the reliability of the product is lower.
Disclosure of Invention
The invention aims to provide an airborne thin-wall storage tank with high reliability and good sealing performance and a manufacturing method thereof, aiming at solving the problems in the prior art. The tank manufacturing method improves the reliability and the sealing performance of the product and simultaneously reduces the production and manufacturing cost of the product.
In order to achieve the above object, the invention relates to an onboard thin-walled tank, characterized in that: the device comprises an upper box body, a lower box body and a sealing gasket, wherein the upper box body and the lower box body are detachably connected together;
the upper box body and the lower box body are cuboids formed by welding a plurality of panels, the top surface of the lower box body is hollow, and the bottom surface of the lower box body is at least provided with a through hole for liquid to flow between the two box bodies; the bottom of the lower box body is provided with a mounting seat for fixing the storage box;
the top surface of the upper box body is provided with a liquid level sensor, a pressure balance valve with a liquid injection function and a normally closed ventilation plug;
two adjacent side walls of the lower box body are provided with a liquid supply assembly and a cleaning plug.
Preferably, the upper box body further comprises a middle partition plate, the middle partition plate divides the upper box body into a left flow distribution chamber and a right flow distribution chamber which are independent from each other, and the bottom of each flow distribution chamber is provided with the through hole; the liquid level sensor and the pressure balance valve are positioned at the top of one of the shunting chambers, and the ventilation plug is positioned at the top of the other shunting chamber.
Further preferably, the through hole is funnel-shaped and is recessed toward the lower case.
Preferably, the panels forming the top and side surfaces of the upper box and the side surfaces of the lower box comprise plate bodies and latticed reinforcing ribs arranged on the surfaces of the plate bodies.
Preferably, the liquid supply assembly comprises an elbow fixed on the lower box body and a liquid supply pipe positioned in the lower box body; the inlet of the liquid supply pipe is close to the bottom of the lower box body, the outlet of the liquid supply pipe is connected with the inlet of the elbow, and the outlet of the elbow is connected with the liquid supply pipeline.
Further preferably, a filter screen is arranged in the elbow.
Further preferably, a clamping groove is formed in the elbow, and the periphery of the filter screen is embedded into the clamping groove and sealed in the elbow through a sealing cover.
Preferably, the edge of the side wall at the contact position of the upper box body and the lower box body and the edge of the side wall at the contact position of the lower box body and the upper box body are provided with folded edges; and intervals are arranged between the two ends of the folded edge and the edge of the side wall.
Further preferably, corner plates are arranged at corners of the contact positions of the upper box body and the lower box body.
The invention also relates to a manufacturing method for processing the onboard thin-walled storage tank, which is characterized by comprising the following steps:
s1, decomposing the upper box body and the lower box body into a plurality of panels according to the rigidity requirement, casting the panels at low pressure, and carrying out heat treatment after molding;
s2, performing local finish machining on the interfaces and the sealing surfaces of the panels;
s3, welding the upper box body and the lower box body by friction stir welding respectively;
s4, connecting the upper box body and the lower box body into a whole by bolts, and sealing;
and S5, installing a liquid level sensor, a pressure balance valve, a ventilation plug, a liquid supply assembly and a cleaning plug.
Preferably, in S1, the heat treatment is solution aging.
Preferably, in S2, the roughness of the sealing surface is at least 3.2.
Preferably, in S3, a corner plate is disposed at a corner of the box body and welded to a folded edge on a side wall of the box body.
The invention has the beneficial effects that: the molding of the casting part is more standard, and the problem of large processing deformation of the thin-wall part is solved. The storage tank main part adopts two parts to go up the box, lower box constitution, is equipped with intermediate bottom in the box of wherein upper portion, and liquid impact in the former storage tank shunts, divides into the triplex, weakens impact energy. Because the storage tank fixed point is at the bottom, belongs to cantilever structure, and in impact and vibration process, the first half shock displacement of whole storage tank is some big, and the storage tank is divided into two parts in the first half, has reduced the influence of liquid impact to the storage tank to a great extent.
Drawings
FIG. 1 is a front view of the prior art
FIG. 2 is a right side view of FIG. 1
FIG. 3 is a top view of FIG. 1
FIG. 4 is a view taken along the line A of FIG. 1
FIG. 5 is a sectional view taken along line B-B of FIG. 2
FIG. 6 is a cross-sectional view taken at C-C of FIG. 3
FIG. 7 is a schematic perspective view of the present invention
FIG. 8 is an exploded view of the upper housing of the present invention
FIG. 9 is an exploded view of the lower housing of the present invention
FIG. 10 is an exploded view of the liquid supply assembly of the present invention
Detailed Description
The technical solutions of the present invention (including the preferred technical solutions) are further described in detail by way of fig. 7 to 10 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in figures 7-10, the invention relates to an onboard thin-wall tank, the tank main body is composed of two parts, including an upper tank body 1 and a lower tank body 2. The two boxes are connected and assembled by bolts, and a sealing washer 3 is arranged at the contact position for sealing. A liquid level sensor 4 connected with the top of the upper box body 1, a pressure balance valve 5, a ventilation plug 6 and movable handles 7 arranged on two opposite side walls of the upper box body 1. The port of the pressure-equalizing valve 5 is also a liquid injection port. A liquid supply assembly 8 and a cleaning plug 10 connected with the lower box body 2. The interfaces are sealed by nitrile rubber sealing gaskets.
The upper box body 1 and the lower box body 2 are cuboids formed by welding a plurality of panels 9. The upper box body 1 is formed by assembling and welding an upper side panel 9.1, an upper bottom panel 9.2, an upper top panel 9.3 and a middle clapboard 9.4. The upper top panel 9.3 is provided with a connecting port 9.5 with the liquid level sensor 4; a connecting port with the pressure balance valve 5 is arranged, and a liquid injection port 9.6 of the storage box is arranged at the same time; the air vent 9.7 connected with the air vent plug 6 is used for ventilation when liquid is filled, and is normally closed at other times. The upper side panel 9.1 and the upper top panel 9.3 are both provided with grid type reinforcing rib plates. The bottom panel 9.2 is provided with the funnel-shaped through hole 9.8, so that the liquid can conveniently flow between the upper box body 1 and the lower box body 2.
The lower box body 2 is formed by combining and welding a lower side panel 9.9 and a lower bottom panel 9.10. The lower side plate 9.9 is provided with a liquid outlet 9.11 connected with the liquid supply assembly 8 and a cleaning port 9.12 connected with the cleaning plug 9, and the lower side plate 9.9 and the lower bottom plate 9.10 are provided with latticed reinforcing rib plates. The lower bottom panel 9.10 is provided with a mounting seat 9.13 for fixing the box body.
The sealing gasket 3 is made of an aircraft rubber sheet HM102 having a high compression rate.
The liquid level sensor 4 measures the medicament in a mode of sensing the liquid level height by using the floater at the fixed point position, gives a signal at the fixed point position and reports the signal to the control subsystem. And monitoring the liquid level height in the storage tank in real time.
The pressure balance valve 5 adopts a spring type working principle, the shell of the valve body is made of light hard rubber materials, and an air filter made of a stainless steel spring and polyurethane is arranged inside the valve body.
The liquid supply assembly 8 consists of a liquid supply pipe 8.1, a filter screen 8.2, an elbow 8.3, a sealing cover 8.4 and a sealing washer 8.5. The filter screen 8.2 is positioned by the elbow 8.3 and the neck 8.6 on the closing cap 8.4, and the bolt-up is sealed with the sealed pad. The filter screen 8.2 can be replaced at any time.
The beneficial effect of the technical scheme of airborne thin-wall storage tank lies in: the storage tank main part adopts two parts to go up the box, lower box constitution, wherein is equipped with intermediate bottom in the upper box, and liquid impact in the former storage tank is shunted, divides into the triplex, weakens impact energy. Because the storage tank fixed point is at the bottom, belongs to cantilever structure, and in impact and vibration process, the first half shock displacement of whole storage tank is some big, and the storage tank is divided into two parts in the first half, has reduced the influence of liquid impact to the storage tank to a great extent.
The storage tank two parts adopt bolt formula loose joint, conveniently use and maintain.
The anti-shaking plate in the original storage tank is eliminated, and the deformation influence of the anti-shaking plate on the tank body is avoided. And furthermore, the grid type reinforcing rib plate in the box body increases the strength of the storage box.
The dipstick of former storage tank is cancelled, adopts level sensor 4, makes things convenient for the control cabinet to carry out real time monitoring to the liquid level of storage tank.
The liquid supply component 8 is provided with a filter screen 8.2 which can filter impurities in liquid in the storage tank, and the impurities are prevented from entering a pump body of the liquid supply system and damaging precision parts of the pump body. The filter screen 8.2 can be dismantled, convenient regular cleaning and maintenance.
The pressure balance 5 at the top of the storage tank adopts a breathing type balance valve, the set pressure is 0.03bar, the flow is not less than 30L/min, the air is automatically exhausted when the pressure is increased, the air is automatically sucked when the pressure is reduced, and the balance of the pressure in the storage tank is ensured. Deformation of the tank due to pressure effects is avoided. The further breathing type balance valve solves the problem of the tightness of the pressure balance device of the original storage tank.
The movable handle 7 at the top of the box body facilitates the transportation and hoisting of the storage box.
The invention discloses a method for manufacturing an airborne thin-wall storage tank, which comprises the steps that an upper tank body 1 and a lower tank body 2 are welded together by a friction stir welding method, all sealing welding seams need to be welded through, the thickness of a welding seam joint needs to be more than 2.2mm, and the strength and the sealing property of a tank wall need to be ensured.
Go up box 1 and divide into 6 curb plates, 1 intermediate bottom and 2 bottom plates tailor-welded, wherein in order to satisfy the welding requirement, avoid box corner part, the box adopts 4 scute 11 and the hem of curb plate on this side to tailor-weld.
The panels are all cast by low-pressure casting, the cast material is aluminum-silicon alloy (ZL114A), the typical wall thickness of the cast is 2.2mm, and the wall thickness tolerance is +/-0.5 mm. The width of the joint is 5mm and the thickness is 5mm by further welding the local part of the connecting part and thickening. And the strong extrusion in the friction stir welding process is met.
The panels are all cast by low-pressure casting, the casting material is aluminum-silicon alloy (ZL114A), the typical wall thickness of the casting is 2.2mm, and the wall thickness tolerance is +/-0.5 mm. The local thickening of further connected part, the joint width is 5mm, and thickness is 5mm, satisfies the strong extrusion of friction stir welding in-process.
The side panels of the upper box body 1 and the lower box body 2 can be combined and formed by adopting a universal mould. The differential portion may be machined to remove or finish the shape.
And all the joint parts are subjected to finish machining after casting, so that the size of the joint is ensured.
Compared with the prior art, the forming of the casting part is more standard, and the problem of large processing deformation of the thin-wall part is solved. The casting mould of box adopts the universalization, and the modularization has reduced the friction stir welding panel shaping mode that manufacturing cost box adopted, has avoided the inside gas pocket defect that exists of large-scale aluminum alloy thin wall cavity casting, has improved the leakproofness and the intensity of storage tank. And simultaneously reduces the manufacturing cost. The friction stir welding method improves the strength and the sealing property of the welding seam of the box body. Meanwhile, the deformation of the aluminum alloy thin-wall part during welding is reduced, the sealing performance and the service life of the storage tank are improved compared with the original gas shielded welding, and the volume of the storage tank is ensured.
The method comprises the following specific steps:
and S1, molding the decomposed panels of the upper box body and the lower box body by adopting a casting mode. And (4) carrying out heat treatment after forming, wherein the heat treatment mode is solid solution aging.
And S2, performing local finishing on the interface and the sealing surface of the panel after heat treatment. The roughness of the sealing surface needs to reach 3.2;
and S3, welding the weld joints of the upper box body, the lower box body and the top part respectively by adopting a friction stir welding method, wherein the weld joints need to be welded through, the welding quality meets the requirement of a first-level weld joint, and the sealing property and the strength of the weld joints are ensured.
And S4, assembling the upper box body and the lower box body in a bolt connection mode. The contact part is sealed by adopting a sealing washer and a sealant. All bolts are sealed with thread sealant.
And S5, assembling the liquid level sensor, the pressure balance valve, the ventilation plug, the handle, the liquid supply assembly and the cleaning plug on the storage tank in a threaded mode, and sealing by adopting a sealing gasket.
The production and manufacturing of the 350L airborne thin-wall storage tank are completed in the steps, vibration and impact tests are carried out according to the requirements of RTCA/D0-160G airborne equipment environmental conditions and test procedures after the production of product samples, and the product tests are qualified.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (10)
1. An airborne thin-walled tank, characterized in that: the device comprises an upper box body, a lower box body and a sealing gasket, wherein the upper box body and the lower box body are detachably connected together;
the upper box body and the lower box body are cuboids formed by welding a plurality of panels, the top surface of the lower box body is hollow, and the bottom surface of the lower box body is at least provided with a through hole for liquid to flow between the two box bodies; the bottom of the lower box body is provided with a mounting seat for fixing the storage box;
the top surface of the upper box body is provided with a liquid level sensor, a pressure balance valve with a liquid injection function and a normally closed ventilation plug;
two adjacent side walls of the lower box body are provided with a liquid supply assembly and a cleaning plug.
2. -airborne thin-walled tank according to claim 1, characterized in that: the upper box body also comprises a middle partition plate, the middle partition plate divides the upper box body into a left shunting chamber and a right shunting chamber which are mutually independent, and the bottom of each shunting chamber is provided with the through hole; the liquid level sensor and the pressure balance valve are positioned at the top of one of the shunting chambers, and the ventilation plug is positioned at the top of the other shunting chamber; the through hole is funnel-shaped and is sunken towards the lower box body.
3. -airborne thin-walled tank according to claim 1, characterized in that: the panel which forms the top surface and the side surface of the upper box body and the side surface of the lower box body comprises a plate body and latticed reinforcing ribs arranged on the surface of the plate body.
4. -airborne thin-walled tank according to claim 1, characterized in that: the liquid supply assembly comprises an elbow fixed on the lower box body and a liquid supply pipe positioned in the lower box body; the inlet of the liquid supply pipe is close to the bottom of the lower box body, the outlet of the liquid supply pipe is connected with the inlet of the elbow, and the outlet of the elbow is connected with the liquid supply pipeline.
5. -airborne thin-walled tank according to claim 4, characterized in that: a filter screen is arranged in the elbow; the elbow is internally provided with a clamping groove, and the periphery of the filter screen is embedded into the clamping groove and sealed in the elbow through a sealing cover.
6. -airborne thin-walled tank according to claim 1, characterized in that: the edge of the side wall at the contact position of the upper box body and the lower box body and the edge of the side wall at the contact position of the lower box body and the upper box body are provided with folded edges; a space is arranged between the two ends of the folded edge and the edge of the side wall; and corner plates are arranged at the corners of the contact positions of the upper box body and the lower box body.
7. A method for manufacturing an onboard thin-walled tank according to claims 1 to 10, characterized in that it comprises the following steps:
s1, decomposing the upper box body and the lower box body into a plurality of panels according to the rigidity requirement, casting the panels at low pressure, and carrying out heat treatment after molding;
s2, performing local finish machining on the interfaces and the sealing surfaces of the panels;
s3, welding the upper box body and the lower box body by friction stir welding respectively;
s4, connecting the upper box body and the lower box body into a whole by bolts, and sealing;
and S5, installing a liquid level sensor, a pressure balance valve, a ventilation plug, a liquid supply assembly and a cleaning plug.
8. Method for manufacturing an on-board thin-walled tank according to claim 7, characterized in that: in S1, solution aging is used for the heat treatment.
9. Method for manufacturing an on-board thin-walled tank according to claim 7, characterized in that: in S2, the roughness of the seal surface is at least 3.2.
10. Method for manufacturing an on-board thin-walled tank according to claim 7, characterized in that: and S3, arranging a corner plate at the corner of the box body and welding a folded edge on the side wall of the joint of the corner plate and the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210058671.8A CN114392506A (en) | 2022-01-14 | 2022-01-14 | Onboard thin-wall storage tank and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210058671.8A CN114392506A (en) | 2022-01-14 | 2022-01-14 | Onboard thin-wall storage tank and manufacturing method thereof |
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| CN114392506A true CN114392506A (en) | 2022-04-26 |
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| CN202210058671.8A Pending CN114392506A (en) | 2022-01-14 | 2022-01-14 | Onboard thin-wall storage tank and manufacturing method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107173372A (en) * | 2017-07-18 | 2017-09-19 | 南京航空航天大学 | Helicopter sprinkling medicine-chest |
| CN109677532A (en) * | 2019-02-25 | 2019-04-26 | 重庆鼎鼎科技有限公司 | A kind of motorcycle tank |
| CN209838523U (en) * | 2019-03-29 | 2019-12-24 | 陕西华臻汽车零部件有限公司 | Expansion tank for vehicle |
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