CN202884469U - Vehicle liquefied natural gas bottle control pipeline structure - Google Patents

Abstract

The utility model discloses a control pipeline structure of a liquefied natural gas cylinder for vehicles, which comprises a liquid return port pipeline of an inflatable panel, a gas return port arranged at one end of the liquid return port pipeline of the inflatable panel, a self-supercharger, one end and a self-increasing The pressurized return hose and the pressurized liquid outlet hose connected to the pressurizer, the liquid outlet pipeline connected with the mouth of the gas cylinder, the liquid inlet pipeline and the gas cylinder communication pipe, it also includes a four-way and a safety valve. The first port of the four-way is connected to the safety valve, the second port of the four-way is connected to the other end of the liquid return pipe of the inflatable panel, the third port of the four-way is connected to the gas cylinder connecting pipe, and the fourth port of the four-way is connected to the pressurized return port. The other end of the gas hose, and the gas cylinder connecting pipe is also provided with a vent stop valve. The utility model eliminates gas leakage during installation and replacement of gas cylinders. Improved safety and gas economy.

Description

Control pipeline structure of liquefied natural gas cylinders for vehicles

technical field

The utility model relates to the technical field of new energy vehicles, in particular to a vehicle-used liquefied natural gas cylinder control pipeline structure.

technical background

Vehicle LNG cylinders store liquefied natural gas at -162°C, but the liquefied natural gas will be transformed into gaseous natural gas as it absorbs heat from the outside world. At this time, the liquefied natural gas and high-pressure gaseous natural gas in the bottle will exist at the same time. The control pipeline structure of the vehicle liquefied natural gas cylinder of the existing structure is shown in Figure 1. When installing and replacing the gas cylinder in this state, loosen the band connecting bolt, and then loosen the pressurized return hose 1 to realize Separate the gas cylinder from the self-pressurization system. At this time, the high-pressure gaseous natural gas in the cylinder will leak through the pressurized return hose 1 until the pressure in the cylinder is equal to the ambient pressure. This will cause a lot of gas waste, and a large amount of natural gas will leak in the The air poses a great safety hazard.

Utility model content

The purpose of the utility model is to solve the above-mentioned technical problems, and provide a control pipeline structure of a liquefied natural gas cylinder for a vehicle, which can prevent gas leakage during the installation and replacement of the liquefied natural gas cylinder.

In order to achieve this purpose, the vehicle liquefied natural gas cylinder control pipeline structure designed by the utility model includes the liquid return port pipeline of the inflatable panel, the gas return port arranged at one end of the liquid return port pipeline of the inflatable panel, a self-supercharger, One end of the booster return hose and the booster outlet hose connected to the self-supercharger, the outlet pipeline and the inlet pipeline connected with the mouth of the gas cylinder, and the gas cylinder connecting pipe, it also includes four-way and Safety valve, the first port of the four-way is connected to the safety valve, the second port of the four-way is connected to the other end of the liquid return port pipeline of the inflatable panel, the third port of the four-way is connected to the gas cylinder connecting pipe, the fourth port of the four-way The interface is connected to the other end of the pressurized air return hose, and the gas cylinder communication pipe is also provided with a venting shut-off valve.

One end of the gas cylinder communication pipe is connected to the mouth of the gas cylinder, and the other end of the gas cylinder communication pipe is connected to the third interface of the cross.

The pressurized outlet hose is provided with a pressurized cut-off valve.

The liquid outlet pipeline is provided with a liquid outlet stop valve.

The end of the liquid inlet pipeline is also provided with a liquid filling port.

The utility model cancels the pipeline joint at the end of the original pressurized air return hose, and at the same time replaces the butt joint at the end of the pipeline at the liquid return port of the inflatable panel with a four-way connection. When the upper self-increasing system is separated, the natural gas in the cylinder can be isolated from the outside world through the vent stop valve, which prevents gas leakage during the installation and replacement of gas cylinders. Improved safety and gas economy.

Description of drawings

Fig. 1 is the structural schematic diagram of the control pipeline structure of the existing liquefied natural gas cylinder for vehicles;

Fig. 2 is the structural representation of the utility model;

Among them, 1—pressurized air return hose, 2—pressurized liquid outlet hose, 3—inflatable panel liquid return pipe, 4—air return port, 5—self-supercharger, 6—gas cylinder bottle mouth, 7 —Liquid outlet pipeline, 8—Liquid inlet pipeline, 9—Square, 10—Safety valve, 11—Cylinder connecting pipe, 12—Venting cut-off valve, 13—Boost booster cut-off valve, 14—Liquid outlet cut-off valve, 15—liquid filling port.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As shown in Figure 2, the vehicle LNG gas cylinder control pipeline structure includes an inflatable panel liquid return port pipeline 3, an air return port 4 arranged at one end of the inflatable panel liquid return port pipeline 3, a self-supercharger 5, and one end The pressurized air return hose 1 and the pressurized liquid outlet hose 2 connected to the self-supercharger 5, the liquid outlet pipeline 7 and the liquid inlet pipeline 8 communicated with the gas cylinder bottle mouth 6, and the gas cylinder communication pipe 11, It also includes a four-way 9 and a safety valve 10, the first interface of the four-way 9 is connected to the safety valve 10, the second interface of the four-way 9 is connected to the other end of the return port pipeline 3 of the inflatable panel, and the third interface of the four-way 9 Connect the gas cylinder communication pipe 11, the fourth port of the cross 9 is connected to the other end of the pressurized air return hose 1, and the gas cylinder communication pipe 11 is also provided with a vent stop valve 12.

In the above technical solution, one end of the gas cylinder communication pipe 11 is connected to the gas cylinder mouth 6 , and the other end of the gas cylinder communication pipe 11 is connected to the third interface of the cross 9 .

In the above technical solution, the pressurized outlet hose 2 is provided with a pressurized cut-off valve 13 .

In the above technical solution, the liquid outlet pipeline 7 is provided with a liquid outlet stop valve 14 .

In the above technical solution, a liquid filling port 15 is also provided at the end of the liquid inlet pipeline 8 .

In the above-mentioned technical solution, the four-way 9 is connected to the gas cylinder connecting pipe 11 on the right, and the liquid return pipeline 3 of the inflatable panel is connected on the upper side. A safety valve 10 is added on the left side (the function of the safety valve 10 is that when the self-supercharger 5 and the gas cylinder are used, the natural gas in the pipeline connected to the self-supercharger 5 absorbs heat and boosts pressure. When the pressure exceeds the setting of the safety valve 10 The safe value will be discharged from the safety valve 10 without causing damage to the pipeline). The pressurized air return hose 1 is connected below the four-way 9 joint. Through this improved design, when the gas cylinder is separated from the self-increasing system on the vehicle frame, the natural gas in the cylinder can be isolated from the outside world through the vent stop valve 12, which prevents gas leakage during the installation and replacement of the gas cylinder.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (5)

1. Vehicular liquefied natural gas cylinder pilot line structure, comprise inflation panel liquid return hole pipeline (3), be arranged on the gas returning port (4) of inflation panel liquid return hole pipeline (3) one ends, automatic pressure intensifier (5), the supercharging return-air flexible pipe (1) that one end is connected with automatic pressure intensifier (5) and supercharging fluid flexible pipe (2), the fluid pipeline (7) that is communicated with bottle mouth of gas cylinder (6) and feed liquor pipeline (8) and gas cylinder connecting tube (11), it is characterized in that: it also comprises four-way (9) and safety valve (10), the first interface connection safety valve (10) of described four-way (9), the second interface of four-way (9) connects the other end of inflation panel liquid return hole pipeline (3), the 3rd interface of four-way (9) connects gas cylinder connecting tube (11), the 4th interface of four-way (9) connects the other end of supercharging return-air flexible pipe (1), also is provided with vent stop valve (12) on described gas cylinder connecting tube (11).

2. according to claim 1 described Vehicular liquefied natural gas cylinder pilot line structure, it is characterized in that: the end of described gas cylinder connecting tube (11) connects bottle mouth of gas cylinder (6), and the other end of gas cylinder connecting tube (11) connects the 3rd interface of four-way (9).

3. according to claim 1 or 2 described Vehicular liquefied natural gas cylinder pilot line structures, it is characterized in that: described supercharging fluid flexible pipe (2) is provided with supercharging stop valve (13).

4. according to claim 1 or 2 described Vehicular liquefied natural gas cylinder pilot line structures, it is characterized in that: described fluid pipeline (7) is provided with fluid stop valve (14).

5. according to claim 1 or 2 described Vehicular liquefied natural gas cylinder pilot line structures, it is characterized in that: the end of described feed liquor pipeline (8) also is provided with filling opening (15).

Images