阅读说明：本技术 一种迷宫支撑管式车载低温绝热气瓶 (Labyrinth supporting tube type vehicle-mounted low-temperature heat insulation gas cylinder ) 是由 刘培启 许海洋 胡大鹏 范海贵 王泽武 于洋 阎琨 于 2019-11-20 设计创作，主要内容包括：一种迷宫支撑管式车载低温绝热气瓶,属于移动式低温绝热压力容器领域。这种车载低温绝热气瓶主要结构特点在于其前支撑结构和后支撑结构。在不改变气瓶结构的前提下,前后支撑的内管和外管均设计成内外交错的迷宫式圆管结构,该结构可以在保证支撑结构强度的同时有效加长导热路径,相对于传统的圆管可大幅度降低漏热量。为了消除热胀冷缩引起的热应力,前后支撑结构采用前端固定、后端滑动的形式。其中,前端支撑固定可以方便气瓶与外侧进出口接管有效连接；后端采用支撑管滑移结构,克服了常规气瓶的后支撑圆柱体直径小、径向晃动大等问题。本发明还具有焊点少、结构简单和强度易保证等优点,该结构可用于存装其他类似的低温液化气。(A labyrinth support tube type vehicle-mounted low-temperature heat insulation gas cylinder belongs to the field of mobile low-temperature heat insulation pressure vessels. The main structural characteristics of the vehicle-mounted low-temperature heat insulation gas cylinder are a front support structure and a rear support structure. Under the prerequisite that does not change the gas cylinder structure, the inner tube and the outer tube of front and back support all design into inside and outside crisscross labyrinth pipe structure, and this structure can effectively lengthen heat conduction route when guaranteeing bearing structure intensity, can reduce the heat leakage quantity by a wide margin for traditional pipe. In order to eliminate thermal stress caused by thermal expansion and cold contraction, the front and rear supporting structures are fixed at the front ends and slide at the rear ends. The front end of the air cylinder is supported and fixed, so that the air cylinder can be conveniently and effectively connected with an inlet and outlet connecting pipe at the outer side; the rear end adopts a supporting tube sliding structure, and the problems of small diameter, large radial shaking and the like of a rear supporting cylinder of a conventional gas cylinder are solved. The invention also has the advantages of less welding spots, simple structure, easy strength guarantee and the like, and the structure can be used for storing other similar low-temperature liquefied gases.)

1. The utility model provides a labyrinth supports on-vehicle low temperature adiabatic gas cylinder of tubular, it includes inner bag, shell, tip pipeline and bearing structure, characterized by: the heat insulation layer (15) wrapping the inner container is arranged in the shell, the end pipeline comprises a liquid inlet pipe (16), a pressure increasing pipe (17), a liquid outlet pipe (18) and a gas return pipe (19) which penetrate through the shell and enter the inner container, and the supporting structure adopts horizontal support or vertical support; the horizontal support comprises a front support structure and a rear support structure, the front support structure is fixed and the rear support structure slides, the front support structure comprises a shell front end socket (1), a liner front end socket (4), a front welding flange (2), a labyrinth front support inner tube (3), a labyrinth front support outer tube (5) and a front support connecting cover (6), one end of the front welding flange (2) is fixedly connected with the shell front end socket (1), the other end of the front welding flange is welded with the labyrinth front support inner tube (3), the labyrinth front support inner tube (3) is connected with one end of the labyrinth front support outer tube (5) through the front support connecting cover (6) at the end part, the other end of the labyrinth front support outer tube (5) is welded with the liner front end socket (4), and the front support structure is separated from the external environment through a front spacer sleeve (7); the back bearing structure contains behind the shell head (13), head (11) behind the inner bag, back sliding sleeve flange (12), support inner tube (10) behind the labyrinth, support outer tube (9) behind the labyrinth and back support connection lid (8), back sliding sleeve flange (12) one end links to each other with shell back head (13) is fixed, the sliding sleeve inner wall of the other end becomes sliding fit with the outer wall of support inner tube (10) behind the labyrinth, support inner tube (10) link together through the one end of back support connection lid (8) and support outer tube (9) behind the labyrinth, the other end of support outer tube (9) behind the labyrinth and head (11) welding are in the same place behind inner bag, back bearing structure separates through back spacer (14) and external environment.

2. The labyrinth support tube type vehicle-mounted cryogenic insulation gas cylinder as claimed in claim 1, characterized in that: the labyrinth type internal and external staggered labyrinth type structure is characterized in that the labyrinth type front supporting inner pipe (3), the labyrinth type front supporting outer pipe (5), the labyrinth type rear supporting inner pipe (10) and the labyrinth type rear supporting outer pipe (9) are designed into different internal and external staggered labyrinth type structures according to heat leakage rate, the pipe wall thickness of the inner pipe and the outer pipe of the square sawtooth type labyrinth type structure is 3-30 mm, the axial length of each square sawtooth is 1-10 mm, and the internal and external staggered structure is formed.

3. The labyrinth support tube type vehicle-mounted cryogenic insulation gas cylinder as claimed in claim 1, characterized in that: the labyrinth type front support inner pipe (3), the labyrinth type front support outer pipe (5), the labyrinth type rear support inner pipe (10) and the labyrinth type rear support outer pipe (9) adopt a trapezoidal, circular, triangular or spiral labyrinth type structure.

4. The labyrinth support tube type vehicle-mounted cryogenic insulation gas cylinder as claimed in claim 1, characterized in that: the heat-insulating gas cylinder is used for storing LNG, liquid nitrogen, liquid oxygen or liquid hydrogen.

5. The labyrinth support tube type vehicle-mounted cryogenic insulation gas cylinder as claimed in claim 1, characterized in that: the vertical support only adopts a front support structure, and the heat insulation gas cylinder is vertically placed and fixed.

Technical Field

The invention relates to a labyrinth support tube type vehicle-mounted low-temperature heat-insulation gas cylinder, belongs to the field of movable low-temperature pressure containers, and particularly relates to a low-temperature heat-insulation gas cylinder which is rapidly developed at present.

Background

The movable pressure containers such as gas cylinders are mainly used for storage and transportation of industrial raw materials and civil fuels, and are important basic equipment for national economic development and important basic facilities for people's life. According to statistics, the annual output of mobile pressure vessels such as gas cylinders and the like in China is 3000 thousands of (only), the consumption is nearly 1.4 hundred million (only), the mobile pressure vessels are all the first in the world, and the mobile pressure vessels have the characteristics of large quantity, wide range, mobility, flammable and explosive media and the like. Therefore, in recent years, the national places have paid particular attention to the technical research on the mobile pressure vessels such as gas cylinders.

With the gradual depletion of traditional energy petroleum and coal, and the greenhouse effect and acid rain generated by combustion products of petroleum and coal, people face a serious challenge of energy, resources and environmental crisis, and people increasingly need clean new energy. Hydrogen can arouse people's interest with the advantages of being renewable and abundant resources, and hydrogen can not cause environmental pollution, thus being an ideal and clean energy source. In order to reduce carbon dioxide discharged by vehicles, hydrogen-burning vehicles using hydrogen as fuel are actively developed, and research on low-temperature liquid hydrogen cylinders is also continuously developed. Compared with the traditional vehicle-mounted low-temperature heat insulation gas cylinder, liquid hydrogen has extremely low medium temperature (the design temperature is-253 ℃), and the heat leakage quantity under the same condition is far higher than that of the traditional gas cylinder, so that the research on the structural design of the low-temperature heat insulation gas cylinder of the liquid hydrogen medium needs to pay attention to the reduction of the overall heat conduction quantity of the gas cylinder and the improvement of the heat insulation performance.

The support tube of the low-temperature heat-insulation gas cylinder is the key of the design of a heat leakage structure of the gas cylinder, and the support tube not only has enough strength to bear various loads during vehicle loading, but also reduces the heat leakage as much as possible. According to the traditional support tube structure, on the premise of ensuring the strength, the heat transfer loss is too high due to too large wall thickness, and researches show that the heat flow proportion of the support structure is as high as 30-50%, so that the requirement of a vehicle-mounted liquid hydrogen cylinder cannot be met. On the contrary, if the heat loss is reduced by reducing the wall thickness, the requirements in terms of support strength, machining, and the like cannot be satisfied. Therefore, it is necessary to develop a vehicle-mounted low-temperature heat-insulation gas cylinder which has a reliable structure, small heat transfer quantity and convenient processing.

Disclosure of Invention

The invention provides a labyrinth support tube type vehicle-mounted low-temperature heat insulation gas cylinder, wherein on the premise of not changing the structural complexity of the gas cylinder, inner tubes and outer tubes of front and rear supports are designed into labyrinth circular tube structures which are staggered inside and outside.

The technical scheme adopted by the invention is as follows: a kind of maze supports the tube type vehicle carried low-temperature adiabatic gas cylinder, it includes inner container, outer casing, end pipeline and supporting structure, there is heat insulation layer to wrap up the inner container in the said outer casing, the said end pipeline includes entering the liquid pipe, booster pipe, drain pipe and air return pipe of the inner container through the outer casing, the said supporting structure adopts the horizontal support or vertical support; the horizontal support comprises a front support structure and a rear support structure, the front support structure is fixed, and the rear support structure slides, the front support structure comprises a shell front end socket, an inner container front end socket, a front welding flange, a labyrinth front support inner tube, a labyrinth front support outer tube and a front support connecting cover, one end of the front welding flange is fixedly connected with the shell front end socket, the other end of the front welding flange is welded with the labyrinth front support inner tube, the labyrinth front support inner tube is connected with one end of the labyrinth front support outer tube through the front support connecting cover at the end part, the other end of the labyrinth front support outer tube is welded with the inner container front end socket, and the front support structure is separated from the external environment through a front spacer sleeve; the back bearing structure contains shell back head, head behind the inner bag, back sliding sleeve flange, the back support inner tube behind the labyrinth, support outer tube and back support connection lid behind the labyrinth, the fixed linking to each other of head behind back sliding sleeve flange one end and the shell, the sliding sleeve inner wall of the other end becomes sliding fit with the outer wall of the back support inner tube behind the labyrinth, the back support inner tube links together through the one end of back support connection lid with the back support outer tube of labyrinth, the other end of the back support outer tube of labyrinth is in the same place with head welding behind the inner bag, back bearing structure separates through back spacer and external environment.

The labyrinth type front supporting inner tube, the labyrinth type front supporting outer tube, the labyrinth type rear supporting inner tube and the labyrinth type rear supporting outer tube are designed into different labyrinth type structures which are staggered inside and outside according to heat leakage rate, the tube wall thickness of the inner tube and the outer tube of the square sawtooth type labyrinth structure is 3-30 mm, the axial length of each square sawtooth is 1-10 mm, and the structures which are staggered inside and outside are formed.

The labyrinth type front support inner pipe, the labyrinth type front support outer pipe, the labyrinth type rear support inner pipe and the labyrinth type rear support outer pipe are of a trapezoidal, circular, triangular or spiral labyrinth type structure.

The heat-insulating gas cylinder is used for storing LNG, liquid nitrogen, liquid oxygen or liquid hydrogen.

The vertical support only adopts a front support structure, and the heat insulation gas cylinder is vertically placed and fixed.

The invention has the beneficial effects that: the utility model provides a labyrinth supports on-vehicle low temperature adiabatic gas cylinder of tubular, horizontal bearing structure includes preceding bearing structure and back bearing structure two parts, in order to eliminate the thermal stress that expend with heat and contract with cold and arouse, preceding bearing structure adopts the fixed, the gliding form of rear end of front end. The front end support is fixed, so that the effective connection of the gas cylinder and the outside inlet and outlet connecting pipe can be facilitated; the rear end supports and slides to select the sliding structure of the supporting tube, so that the problems that the diameter of a rear supporting cylinder of a conventional low-temperature bottle is small, the radial shaking is large, the precision of a supporting structure connected with a shell is difficult to guarantee and the like are solved. Different from the traditional straight circular tube, the front support inner tube and the rear support inner tube in the invention are designed into a labyrinth structure which is staggered inside and outside or other similar sawtooth structures, and under the condition of limited length, the heat conduction path is prolonged by adopting the staggered inside and outside structure, so that the heat leakage quantity at the position can be reduced by more than 1/3. Moreover, the neck tube style can be realized by a mechanical processing method, and the neck tube has the advantages of less welding spots, less defects and easy guarantee of strength. The gas cylinder can be used for storing liquefied hydrogen and other low-temperature liquefied gases such as LNG (liquefied natural gas), liquid nitrogen, liquid oxygen and the like, and the application range is not limited by media. If the rear supporting part of the gas cylinder is removed, the gas cylinder comprises a rear supporting connecting cover, a labyrinth rear supporting outer pipe, a labyrinth rear supporting inner pipe, a rear sliding sleeve flange and a rear spacer sleeve, and can be vertically placed and also be changed into a vertical low-temperature heat insulation gas cylinder.

Drawings

Fig. 1 is a structural view of a labyrinth support tube type vehicle-mounted cryogenic insulation gas cylinder.

Fig. 2 is a view of the orifice orientation of the insulated cylinder end piping of fig. 1.

Fig. 3 is an enlarged view a in fig. 1.

Fig. 4 is an enlarged view B of fig. 1.

Fig. 5 is an enlarged view of C in fig. 3.

In the figure: 1. the inner tube type heat exchanger comprises a shell front end socket, 2, a front welding flange, 3, a labyrinth type front support inner tube, 4, an inner container front end socket, 5, a labyrinth type front support outer tube, 6, a front support connecting cover, 7, a front spacer sleeve, 8, a rear support connecting cover, 9, a labyrinth type rear support outer tube, 10, a labyrinth type rear support inner tube, 11, an inner container rear end socket, 12, a rear sliding sleeve flange, 13, a shell rear end socket, 14, a rear spacer sleeve, 15, a heat insulating layer, 16, a liquid inlet tube, 17, a pressure increasing tube, 18, a liquid outlet tube, 19 and a gas return tube.

Detailed description of the preferred embodiments

The device is described in detail below with reference to the accompanying drawings.

Fig. 1 shows a structural view of a vehicle-mounted cryogenic insulation gas cylinder of a labyrinth support tube type. The thermally insulated gas cylinder comprises a liner, a housing, end pipes, a thermal insulation layer 15, a front support structure arranged in a front spacer 7 and a rear support structure arranged in a rear spacer 14.

Fig. 2 is a view of the orifice orientation of the insulated cylinder end piping of fig. 1. The liquid inlet pipe 16, the pressure increasing pipe 17, the liquid outlet pipe 18 and the air return pipe 19 all penetrate through the shell front end enclosure 1 and the inner container front end enclosure 4 to enter the inner container.

Fig. 3 shows a structural view of the front support assembly (an enlarged view of a in fig. 1). The front support assembly comprises a shell front end enclosure 1, a liner front end enclosure 4, a front welding flange 2, a labyrinth front support inner pipe 3, a labyrinth front support outer pipe 5 and a front support connecting cover 6. One end of the front welding flange 2 is fixedly connected with the front shell head 1 through welding, the other end of the front welding flange is welded with the labyrinth front support inner pipe 3, the labyrinth front support inner pipe 3 is fixedly connected with the labyrinth front support outer pipe 5 through the front support connecting cover 6 at the end part, and the other end of the labyrinth front support outer pipe 5 is welded with the front inner container head 4.

Fig. 4 shows a structural view of the rear support assembly (enlarged view of B in fig. 1). After bearing structure contains shell back head 13, inner bag back head 11, back sliding sleeve flange 12, support inner tube 10 behind the labyrinth, support outer tube 9 and back supporting connection lid 8 behind the labyrinth, back sliding sleeve flange 12 one end links to each other with shell back head 13 is fixed, the sliding sleeve inner wall of the other end becomes sliding fit with the outer wall of support inner tube 10 behind the labyrinth, support inner tube 10 behind the labyrinth links together through the one end of back supporting connection lid 8 and the back supporting outer tube 9 of labyrinth, the other end of the back supporting outer tube 9 of labyrinth and the 11 welding of inner bag back head are in the same place.

Fig. 5 shows a detailed structural view of the labyrinth support (enlarged view of C in fig. 4). The neck pipe is integrally processed into the internal and external staggered form, and the specific sizes of the labyrinth supporting pipe and the chamfer angle in the drawing can be changed according to the different requirements of the gas cylinder on the strength and the heat leakage quantity of the neck pipe.

By adopting the technical scheme, the vehicle-mounted low-temperature heat-insulation gas cylinder supporting structure keeps enough supporting strength and can bear various loads generated in a vehicle-mounted process. The supporting structure adopts a supporting mode of front fixing and rear sliding, effectively reduces the thermal stress inside the gas cylinder and prolongs the service life of the gas cylinder. The inner pipe and the outer pipe of the front support and the rear support are both designed into a labyrinth type circular pipe structure with the inner part and the outer part staggered with each other, compared with the traditional circular pipe, the heat conduction path is greatly increased, the heat leakage is reduced, and the purpose of low-temperature heat insulation is achieved. Similarly, when the medium or application occasion of the vehicle-mounted low-temperature heat insulation gas cylinder changes, the inner pipe and the outer pipe of the front support and the rear support can also adopt staggered sawtooth structures with different shapes such as a trapezoid structure, a circular structure, a triangular structure and the like, the principle of the staggered sawtooth structures is the same as that of a labyrinth structure, and finally the same technical effect can be obtained.

The gas cylinder can be used for storing liquefied hydrogen and other low-temperature liquefied gases such as LNG (liquefied natural gas), liquid nitrogen, liquid oxygen and the like, and the application range is not limited by media. On the basis of the scheme, if the rear supporting part of the gas cylinder is removed, the gas cylinder comprises a rear supporting connecting cover 8, a labyrinth rear supporting outer pipe 9, a labyrinth rear supporting inner pipe 10, a rear sliding sleeve flange 12 and a rear spacer sleeve 14, and is placed vertically, the scheme is changed into a vertical low-temperature heat insulation gas cylinder.