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Automotive LNG (liquefied natural gas) liquid-phase flow limiting valve

A flow-restricting valve and flow-restricting technology, applied in the field of vehicle LNG, can solve the problems of detachment of joints, large flow error, unstable gas supply, etc., and achieve the effect of avoiding a large number of rapid leakage, long service life and improving safety.

Inactive Publication Date: 2013-09-25
DANYANG FEILUN GAS VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of using liquefied natural gas (LNG), the liquid supply pipeline of the natural gas supply system will break or the joint will fall off, etc., and the natural gas will leak in large quantities, not only losing natural gas, but also causing serious dangers of accidents
The single steel ball type flow limiting valve in the prior art has high requirements on the manufacture and installation of the valve, resulting in large flow errors, easy to cut off the flow when the flow limiting is closed, and the gas supply is unstable

Method used

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  • Automotive LNG (liquefied natural gas) liquid-phase flow limiting valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An LNG liquid phase flow limiting valve for vehicles, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow limiting assembly; wherein, one end of the liquid outlet joint 15 is provided with an external thread that matches the internal thread of the valve body 12, and the outlet The liquid joint 15 and the valve body 12 are fixed by threaded connection, and the liquid outlet joint 15 is also provided with an internal thread matched with the external thread of the flow limiting assembly. The liquid outlet joint 15 and the flow limiting assembly are fixed by threaded connection. An external thread that matches the internal thread of the liquid outlet pipe is provided; the valve body 12 is provided with a main liquid inlet 14 and a main liquid inlet channel 13, and an external thread that matches the internal thread of the liquid inlet pipe is arranged on the outside of the main liquid inlet 14 to limit the flow. The component is set in the main l...

Embodiment 2

[0020] An LNG liquid phase flow limiting valve for vehicles, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow limiting assembly; wherein, the liquid outlet joint 15 and the valve body 12 are fixed by welding, and the liquid outlet joint 15 is arranged with the flow limiting assembly The internal thread matched with the external thread, the liquid outlet joint 15 and the flow limiting assembly are fixed through threaded connection, the other end of the liquid outlet joint 15 is provided with an external thread matched with the internal thread of the liquid outlet pipe; the valve body 12 is provided with a main liquid inlet 14 And the main liquid inlet channel 13, the outer side of the main liquid inlet 14 is provided with an external thread that matches the inner thread of the liquid inlet pipe, the flow limiting assembly is arranged in the main liquid inlet channel 13, and an outlet is provided at one end of the liquid passage of the main body 1 o...

Embodiment 3

[0022] An LNG liquid phase flow limiting valve for vehicles, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow limiting assembly; wherein, the liquid outlet joint 15 and the valve body 12 are fixed by welding, and the liquid outlet joint 15 is arranged with the flow limiting assembly The internal thread matched with the external thread, the liquid outlet joint 15 and the flow limiting assembly are fixed through threaded connection, the other end of the liquid outlet joint 15 is provided with an external thread matched with the internal thread of the liquid outlet pipe; the valve body 12 is provided with a main liquid inlet 14 And the main liquid inlet channel 13, the outer side of the main liquid inlet 14 is provided with an external thread that matches the inner thread of the liquid inlet pipe, the flow limiting assembly is arranged in the main liquid inlet channel 13, and an outlet is provided at one end of the liquid passage of the main body 1 o...

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Abstract

The invention discloses an automotive LNG (liquefied natural gas) liquid-phase flow limiting valve which mainly comprises a valve body, a liquid-outlet joint and a flow limiting component. One end of a flowing passage of a flow limiting component body is of a liquid outlet end, a spring mount is arranged at the liquid outlet end, a spring is mounted on the spring mount, a flow limiting ball is mounted on the spring, a lower flow limiting bearing block is arranged at the other end of the flowing passage, an emergent cutoff liquid inlet is arranged on the lower flow limiting bearing block, an upper flow limiting bearing block is arranged on one side of the flow limiting ball close to the liquid outlet end, a moving cavity for the flow limiting ball to move is formed between the lower flow limiting bearing block and the upper flow limiting bearing block, the diameter of the section of the flowing passage at the lower flow limiting bearing block and the upper flow limiting bearing block is smaller than that of the flow limiting ball, at least one liquid inlet is formed in the side wall of the moving cavity and is communicated with the moving cavity, and a balance hole is formed in the side wall of the liquid outlet end to run through the flow limiting component body. The automotive LNG liquid-phase flow limiting valve is firm in structure, not easy to damage, long in service life, high in safety and good in flow limiting effect.

Description

technical field [0001] The invention belongs to the field of vehicle LNG, in particular to a vehicle LNG liquid phase flow limiting valve. Background technique [0002] At present, with the society's requirements on vehicle exhaust emissions and the increase in the price of traditional vehicle fuels, natural gas vehicles using natural gas as fuel have attracted more and more attention. In the process of using liquefied natural gas (LNG), the liquid supply pipeline of the natural gas supply system will break or the joint will fall off, etc., and the natural gas will leak in large quantities, not only losing natural gas, but also causing serious dangers of accidents. The single steel ball type flow limiting valve of the prior art has high requirements on the manufacture and installation of the valve, resulting in a large flow error, easy to cut off the flow when the flow limiting is closed, and the gas supply is unstable. Contents of the invention [0003] The object of the...

Claims

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Application Information

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IPC IPC(8): F16K17/30
Inventor 鲁卫国刘敏马正云
Owner DANYANG FEILUN GAS VALVE
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