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
5 Cites 1 Cited by

AI-Extracted 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...
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Method used

A kind of vehicle LNG liquid phase flow-limiting valve, main body structure comprises valve body 12, liquid outlet joint 15 and flow limiting assembly; Wherein, liquid outlet joint 15 and valve body 12 are fixed by welding, and liquid outlet joint 15 is arranged with The internal thread that matches the external thread of the flow limiting assembly, the liquid outlet joint 15 and the flow limiting assembly are fixed by threaded connection, the other end of the liquid outlet joint 15 is provided with an external thread that matches the internal thread of the liquid outlet pipeline; the valve body 12 is provided with the main inlet The liquid inlet 14 and the main liquid inlet channel 13, the outer thread of the main liquid inlet 14 is arranged to match the inner thread of the liquid inlet pipe, the flow limiting assembly is arranged in the main liquid inlet channel 13, and the liquid passage of the main body 1 of the flow limiting assembly One end is provided with a liquid outlet 6, and a spring mounting seat 7 is provided at the 6 places of the liquid outlet. The flow ball bearing seat 4 is provided with an emergency shut-off liquid inlet 5, the side of the flow limiting ball 3 close to the liquid outlet 6 is provided with an upper limit flow ball bearing seat 8, and the lower limit flow ball bearing seat 4 an...
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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.

Application Domain

Equalizing valvesSafety valves

Technology Topic

Natural gas fuelLiquefied natural gas +2

Image

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

Examples

  • Experimental program(3)

Example Embodiment

[0017] Example 1:
[0018] A vehicle LNG liquid-phase flow restrictor valve, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow restriction assembly; wherein, one end of the liquid outlet joint 15 is provided with an external thread matched with 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 inner thread matched with the external thread of the flow restrictor assembly. An external thread matched with 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 matched with the internal thread of the liquid inlet pipe is provided on the outside of the main liquid inlet 14 to limit the flow. The assembly is arranged in the main liquid inlet channel 13, and a liquid outlet end 6 is arranged at one end of the liquid passage of the main body 1 of the restrictor assembly, and a spring mounting seat 7 is arranged at the liquid outlet end 6. The spring mounting seat 7 is installed with the spring 2, and the spring 2 is installed on the The flow restriction ball 3, the other end of the liquid passage is provided with a lower flow restriction ball bearing seat 4, the lower flow restriction ball bearing seat 4 is provided with an emergency cut-off liquid inlet 5, and the side of the flow restriction ball 3 close to the liquid outlet end 6 is provided with an upper limit flow ball The bearing seat 8, the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 form a moving cavity 9 for the movement of the flow limit ball 3, and the cross section of the liquid passage at the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 The diameters are smaller than the diameter of the restrictor ball 3. A liquid inlet 10 is arranged on the side wall of the moving cavity 9. The liquid inlet 10 communicates with the moving cavity 9. The side wall of the liquid outlet 6 is provided with a balance hole 11 which penetrates the main body of the restrictor assembly. 1; Among them, the spring mounting seat 7 and the upper limit flow ball bearing seat 8 of the current limiting assembly are integrated with the current limiting assembly main body 1, the lower flow limiting ball bearing seat 4 and the current limiting assembly body 1 are separated structures, and the lower flow limiting ball bearing The outer wall of the seat 4 is provided with external threads, the emergency cut-off liquid inlet 5 of the current limiting assembly main body 1 is provided with internal threads, and the lower current limiting ball bearing seat 4 is connected with the current limiting assembly body 1 through threads.

Example Embodiment

[0019] Example 2:
[0020] An LNG liquid-phase flow restrictor valve for vehicles, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow restriction 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 restriction assembly. The internal thread matched with the external thread, the liquid outlet joint 15 and the current limiting assembly are fixed by threaded connection, and 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 internal thread of the liquid inlet pipe, the flow restricting assembly is arranged in the main liquid inlet channel 13, and one end of the liquid passage channel of the main body 1 of the flow restricting assembly is provided. The liquid end 6 and the liquid outlet end 6 are provided with a spring mounting seat 7, a spring 2 is mounted on the spring mounting seat 7, a restricting ball 3 is mounted on the spring 2, and the other end of the liquid passage is provided with a lower restricting ball bearing seat 4, which is carried by the lower restricting ball The seat 4 is provided with an emergency cut-off liquid inlet 5, and the upper limit flow ball bearing seat 8 is arranged on the side of the flow restricting ball 3 close to the liquid outlet end 6, and the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 form an available limit. In the moving cavity 9 where the flow ball 3 moves, the diameters of the liquid passages at the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 are all smaller than the diameter of the flow limit ball 3, and two symmetrical two are arranged on the side wall of the moving cavity 9. A circular liquid inlet 10, the liquid inlet 10 communicates with the moving cavity 9, and the side wall of the liquid outlet 6 is provided with a balance hole 11 which penetrates through the main body 1 of the current limiting assembly; wherein, the spring mounting seat 7 of the current limiting assembly and the upper limit flow ball bearing seat 8 is an integral structure with the main body 1 of the current limiting assembly, and the lower current limiting ball bearing seat 4 is an integral structure with the main body 1 of the current limiting assembly.

Example Embodiment

[0021] Example 3:
[0022] An LNG liquid-phase flow restrictor valve for vehicles, the main structure includes a valve body 12, a liquid outlet joint 15 and a flow restriction 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 restriction assembly. The internal thread matched with the external thread, the liquid outlet joint 15 and the current limiting assembly are fixed by threaded connection, and 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 internal thread of the liquid inlet pipe, the flow restricting assembly is arranged in the main liquid inlet channel 13, and one end of the liquid passage channel of the main body 1 of the flow restricting assembly is provided. The liquid end 6 and the liquid outlet end 6 are provided with a spring mounting seat 7, a spring 2 is mounted on the spring mounting seat 7, a restricting ball 3 is mounted on the spring 2, and the other end of the liquid passage is provided with a lower restricting ball bearing seat 4, which is carried by the lower restricting ball The seat 4 is provided with an emergency cut-off liquid inlet 5, and the upper limit flow ball bearing seat 8 is arranged on the side of the flow restricting ball 3 close to the liquid outlet end 6, and the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 form an available limit. In the moving cavity 9 where the flow ball 3 moves, the diameters of the liquid passages at the lower limit flow ball bearing seat 4 and the upper limit flow ball bearing seat 8 are all smaller than the diameter of the flow limit ball 3 . The liquid inlet 10 of the cloth can play the role of stabilizing the fluid. The liquid inlet 10 communicates with the moving cavity 9, and the side wall of the liquid outlet 6 is provided with a balance hole 11 that penetrates the main body 1 of the restrictor assembly; The spring mounting seat 7 and the upper limit flow ball bearing seat 8 are integrated with the current limiting assembly main body 1, the lower current limiting ball bearing seat 4 and the current limiting assembly body 1 are separated structures, and the outer wall of the lower flow limiting ball bearing seat 4 is provided with external threads to limit the flow. The emergency cut-off liquid inlet 5 of the flow assembly main body 1 is provided with an internal thread, and the lower flow restricting ball bearing seat 4 is connected to the flow restricting assembly main body 1 through the screw thread.

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Description & Claims & Application Information

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