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

[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.

[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.

[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.