The invention relates to a pneumatic brake valve of 21MPa. A brake pipe nozzle is arranged in an air inlet cavity of a casing, an exhaust hole of a piston communicates with a brake cavity, a brake cavity spring is mounted on the piston in a sleeving manner, and an air inlet valve seat is mounted on the brake cavity spring in a sleeving manner; an air inlet valve is positioned on the outer end surface of the air inlet valve seat, an exhaust valve is positioned in an exhaust cavity of the casing, and a screw plug is mounted on the air inlet valve in a sleeving manner; a pressure relief spring is mounted in an exhaust valve assembly; a pull rod is mounted in center holes of spring seats and a center hole of the pressure relief spring, and a spherical head of the pull rod is matched with a spherical pit in the end surface of one end of the exhaust valve; snap rings are mounted between the pull rod and the spring seats; the spherical surface of one end of the pull rod is matched with the spherical pit in the exhaust valve; one end of a pressure head is positioned in the casing and is mounted on the pressure relief spring in a sleeving manner. According to the pneumatic brake valve disclosed by the invention, different operating force is set for products, so that required brake pressure is obtained; nitrogen enters the brake cavity to be decompressed, and then is output to a brake device; therefore, braking is completed, and the purpose of judging whether the braking speed is high or low according to the length of air inlet time.
Pneumatic brake valve of 21MPa
2016-01-06
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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