CN104948903B - A new type of liquefied natural gas bottle - Google Patents

Abstract

A novel liquefied natural gas cylinder comprises an outer shell, an inner tank and a support assembly thereof. The inner liner of the gas cylinder is designed as a ring-shaped tube structure, and the outer shell is designed as a ring-shaped structure. The overall shape is similar to that of a car tire. Open a hole in the middle of the upper casing (1), reserve the space for the outer distributor (7), and leave a vacuum port. Distributor (7) has the function of guiding liquid and supporting. This gas cylinder structure not only reasonably reduces the volume of the vehicle-mounted LNG cylinder, solves the problem that the gas cylinder occupies a large space in the car, but also makes use of the idle space inside the car.

Description

A new type of liquefied natural gas bottle

technical field

The invention belongs to a storage and transportation device for storing and transporting cryogenic liquids, in particular to a vehicle-mounted liquefied natural gas cylinder.

Background technique

With the increase of the number of automobiles in my country, the demand for energy is also increasing. LNG has become the first choice for various alternative fuel vehicles due to its economy, safety, and environmental protection. Vehicle-mounted LNG cylinders, as a key part of the LNGV vehicle-mounted fuel system, have received widespread attention, and their demand is also increasing. However, LNG cylinders with traditional cylindrical structure have large dimensions in all directions and poor space utilization. They occupy a large space in the trunk of a car, which brings many problems to the use of LNG cylinders.

Contents of the invention

The purpose of this patent is to provide a new type of vehicle-mounted LNG gas cylinder, which solves the problem that traditional gas cylinders occupy a large space, and rationally utilizes the space for placing a spare tire in the trunk of the car.

The proposed solution is to provide a new type of liquefied natural gas cylinder. The cylinder for storing liquefied natural gas is a circular cylinder that bends a tube horizontally into a ring and is connected end to end. The inner layer is the inner tank and the outer layer is the Insulation layer; the ring-shaped gas cylinder is fixed to the outer shell through the vertical center frame; the outer shell is a metal shell that encloses the ring-shaped gas cylinder as a whole, including the upper shell and the lower shell; the ring-shaped gas cylinder The vaporization coil is spiraled between the upper shell and the lower shell; the anti-overfill plate device and the liquid level gauge are fixed in the annular gas cylinder; The support component, the upper end of the lower support component is a semi-circular arc groove, which is used to overlap the horizontal intermediate horizontal tube, and the two ends of the intermediate horizontal tube are fixed with the inner ring of the annular gas cylinder; the upper support tube and the lower support component are coaxial, And the lower end is fixedly welded on the middle horizontal tube, the distributor is inserted into the upper support tube in the housing, and the top end passes through the upper housing; the distributor and the upper housing are fixedly connected by ferrules; the gas cylinder inlet pipe and emptying pipe , the sensor of the liquid level gauge, and the gas outlet pipe are all connected to the gas cylinder through the distributor. There is a vacuum port on the upper shell, and the air between the inner tank and the shell is drawn out through the vacuum port.

The anti-overfilling device is vertically fixedly installed on one side of the annular gas cylinder to isolate a vertical partition of a small space, and a hole is left in the lower part of the partition. Palladium oxide is welded at the welding place between the anti-overfill device and the inner tank. The molecular sieve package is welded at the welding place between the anti-overfill device and the inner tank. Palladium oxide and molecular sieve packs can absorb the residual gas in the interlayer and maintain high vacuum in the interlayer space.

The shell of the gas cylinder is a ring-shaped structure, which is welded by two parts, the upper shell and the lower shell.

The beneficial effect of the patent is that the inner liner of the gas cylinder is designed into a ring structure, and the outer shell is designed into a ring-disk structure, and the overall shape is similar to that of an automobile tire. A hole is opened in the middle of the upper shell to reserve space for the outer distributor and a vacuum port. This gas cylinder structure not only reasonably reduces the volume of the vehicle-mounted LNG cylinder, solves the problem that the gas cylinder takes up a lot of space in the car, but also makes use of the idle space inside the car.

Description of drawings

The accompanying drawing is a longitudinal sectional view of the cylinder structure.

In the figure: 1 upper casing, 2 lower casing, 3 heat insulation layer, 4 vaporization coil, 5 liner, 6 ferrule, 7 distributor, 8 liquid inlet pipe, 9 upper support pipe, 10 middle horizontal pipe, 11 Empty pipe, 12 lower support components, 13 liquid level gauge, 14 palladium oxide, 15 anti-overfill device, 16 molecular sieve bag.

specific implementation plan

The device will be described in detail below in conjunction with the accompanying drawings.

The gas cylinder for storing liquefied natural gas is a ring-shaped gas cylinder that is horizontally bent into a ring and connected from end to end, wherein the inner layer is an inner tank (5) and the outer layer is a heat-insulating layer (3); The vertical center frame and the outer casing are fixed to each other; the outer casing is a metal casing that encloses the annular gas cylinder as a whole, including an upper casing (1) and a lower casing (2); The vaporization coil (4) is coiled between the shell (1) and the lower shell (2); the anti-overfill plate device (15) and the liquid level gauge (13) are fixed in the annular gas cylinder; the vertical center frame It is a circular tubular lower support component (12) whose base is fixed at the center of the lower housing (2). The two ends of the middle horizontal tube (10) are fixed to the inner ring of the annular gas cylinder; the upper support tube (9) is coaxial with the lower support assembly (12), and the lower end is fixedly welded on the middle horizontal tube (10), and the distributor ( 7) Insert into the upper support tube (9) in the casing, and the top end passes through the upper casing (1); the distributor (7) is fixedly connected with the upper casing (1) through the ferrule (6); Pipe (8), emptying pipe (11), sensor line of liquid level gauge (13), and air outlet pipe are all connected to gas cylinder through distributor (7). There is a vacuum port on the upper shell (1), and the air between the inner tank (5) and the upper shell (1) and the lower shell (2) is drawn out through the vacuum port, so that the interlayer space forms a high vacuum. Insulation layer. Palladium oxide (14) is welded at the welding place between the anti-overfill device and the inner tank. Molecular sieve bag (16) is welded on anti-overfill device and inner tank welding place. Palladium oxide and molecular sieve packs can absorb the residual gas in the interlayer and maintain high vacuum in the interlayer space.

The liquid level gauge (13) and the anti-overfilling device (15) are welded in the inner tank (5), and these parts form the inner tank assembly together. Palladium oxide (14) and molecular sieve bag (16) are respectively welded on the outer surface of anti-overfilling device (15) and inner tank 5 welding place. A heat insulating material is wound on the outer surface of the inner container to form a heat insulating layer (3).

The connection method between the liner (5) and the upper shell (1) is: the upper support tube (9) in the liner assembly is welded to the distributor (7), and the distributor (7) is connected to the upper part of the shell through the ferrule (6) (1) welding. The distributor (7) protrudes from the upper casing (1) and is connected with the piping system.

The connection mode between the liner (5) and the lower casing (2) is: the lower support assembly (12) is welded to the lower casing (2), and the middle horizontal tube (10) is placed in the concave hole at the upper end of the lower support assembly (12). on the slot.

A vaporization coil (4) is coiled and brazed on the upper casing (1) and the lower casing (2), one end of which extends into the inner tank (5), and the other end is connected with the distributor (7), and the liquid enters The tube (8) extends into the inner tank (5) through the distributor (7), the emptying tube (11) is inserted into the inner tank (5) through the distributor (7), and the other end is connected with the external pipeline.

Claims (6)

1. a Novel liquefied natural gas bottle, it is characterised in that the gas cylinder of storage liquefied natural gas is By a body horizontal curvature circlewise, and the ring-type gas cylinder of head and the tail connection, wherein internal layer is inner bag (5), outer layer is heat insulation layer (3)；Ring-type gas cylinder is by vertical central frame body and external shell Interfix；External shell is the overall metal shell entangled by ring gas bottle, including upper shell And lower house (2) (1)；At ring-type gas cylinder and upper shell (1), the intercalated disc of lower house (2) Rotation vaporization coil (4)；Anti-overcharge panel assembly (15) and liquidometer (13) is fixed in ring-type gas cylinder； Vertical central frame body is that base is fixed on support group under the circular tube shaped of lower house (2) center Part (12), the upper end of lower supporting assembly (12) is semicircular arc groove, in order to overlap level Middle transverse tube (10), the two ends of middle transverse tube (10) are fixed with ring-type gas cylinder inner ring；On Prop up stay tube (9) coaxial with lower supporting assembly (12), and lower end is fixedly welded on middle transverse tube (10) above, allotter (7) inserts in upper the stay tube (9) in housing, and top is worn Cross upper shell (1)；Allotter (7) welds by cutting ferrule (6) is fixing with upper shell (1)； Gas cylinder feed tube (8), evacuated tube (11), the sensor of liquidometer (13) and escape pipe All accessed in gas cylinder by allotter (7)；Upper shell (1) leaves vacuum orifice, interior Air between gallbladder (5) and upper shell (1) and lower house (2) is extracted out by vacuum orifice, Form the heat insulation layer of condition of high vacuum degree.

A kind of Novel liquefied natural gas bottle the most according to claim 1, it is characterised in that anti- Overcharging device (15) is that to be vertically fixedly mounted on ring-type gas cylinder side less for isolating one The vertical partition plate in space, leaves hole in the bottom of dividing plate.

A kind of Novel liquefied natural gas bottle the most according to claim 1, it is characterised in that oxygen Change palladium (14) and be welded on anti-overcharge device (15) and inner bag (5) weld.

A kind of Novel liquefied natural gas bottle the most according to claim 1, it is characterised in that point Son sieve bag (16) is welded on anti-overcharge device (15) and inner bag (5) weld.

A kind of Novel liquefied natural gas bottle the most according to claim 1, it is characterised in that Shell is ring disk-like structure.

A kind of Novel liquefied natural gas bottle the most according to claim 1, it is characterised in that Cylinder package is to be welded by upper shell (1) and lower house (2) two parts.