Patent AU-2016291544-A1 (AU)
Title: Release adjusting valve for rolling stocks
Inventor: ZHANG JIE
IPC: B60T1/00
Filed: 2016-09-29
Abstract: Claims 1. A release adjusting valve for rolling stocks, comprising a valve body (1) with an air inlet (13) and an air outlet (14), and characterized in that a push rod (2), a valve seat (3) and a sandwich valve (4) are arranged in the valve body (1), the lower part of the push rod (2) is arranged in the valve seat (3) and the upper part thereof is connected with a push rod drive mechanism, a push rod spring (5) is sleeved on the push rod (2) and arranged above the valve seat (3), one end of the push rod spring (5) abuts against one end face of the valve seat (3), and the other end abuts against a step face of the push rod (2), the sandwich valve (4) is arranged at a valve port (6) of the valve seat (3), a sandwich valve spring (7) is arranged below the sandwich valve (4), the air inlet (13) is in communication with a chamber A (8) above the sandwich valve (4) through a release pathway A (9) on the valve body (1), a retracted plug (10) is arranged in the release pathway A (9), the air inlet (13) is in communication with a chamber B (11) below the sandwich valve (4) through a release pathway B (12) on the valve body (1), and the chamber A (8) above the sandwich valve (4) is in communication with the air outlet (14), at the fast release position, the push rod (2) opens the sandwich valve (4) under the action of the push rod drive mechanism, the air inlet (13) is in communication with the chamber A (8) through the open valve port (6) and the retracted plug (10), and at the slow release position, the sandwich valve (4) closes the valve port (6), and the air inlet (13) is in communication with the chamber A (8) through the retracted plug (10). 2. The release adjusting valve for rolling stocks according to claim 1, n) characterized in that the push rod drive mechanism comprises an eccentric conversion shaft (15) passing through the valve body (1), and two ends of the eccentric conversion shaft (15) are arranged at two sides of the valve body (1) respectively, at the fast release position, a high position of the eccentric conversion shaft (15) contacts the upper end face of the push rod (2), so that the push rod (2) opens the sandwich valve (4), and at the slow release position, a low position of the eccentric conversion shaft (15) contacts the upper end face of the push rod (2), so that the lower end of the push rod (2) breaks away from the sandwich valve (4), and the sandwich valve (4) closes the valve port (6) of the valve seat (3) under the action of the sandwich valve spring (7). 3. The release adjusting valve for rolling stocks according to claim 2, characterized in that the eccentric conversion shaft (15) is connected with the valve body (1) through a shaft sleeve (16), a limit boss (17) matching the corresponding shaft sleeve (16) is arranged at one end of the eccentric conversion shaft (15), and a limit ring (18) matching the corresponding shaft sleeve (16) is arranged at the other end of the eccentric conversion shaft (15), and the eccentric conversion shaft (15) only rotates axially and cannot move axially under the cooperation of the limit boss (17) and the limit ring (18). 4. The release adjusting valve for rolling stocks according to claim 1, characterized in that bushings (23) are arranged in the valve body (1) and below the valve seat (3), the sandwich valve (4) and the sandwich valve spring (7) are arranged in the bushings (23), a through hole in communication with the release pathway A (9) is arranged on the valve seat (3), and through holes in communication with the release pathway B (12) are arranged on the bushings (23). 5. The release adjusting valve for rolling stocks according to claim 1, characterized in that seal rings (19) are arranged on the push rod (2) and between the lower part of the push rod (2) and the valve seat (3), and seal rings (19) are arranged on the valve seat (3) and between the valve seat (3) and the valve body (1). 6. The release adjusting valve for rolling stocks according to claim 1, characterized in that a valve cap (20) is arranged at the lower end of the valve body (1), a seal ring (19) is arranged between the valve body (1) and the valve cap (20), a mounting seat (21) is arranged at the upper end of the valve body (1), and the release adjusting valve is connected with a car body through the mounting seat (21). 7. The release adjusting valve for rolling stocks according to any of claims 1 to 6, characterized in that the air inlet (13) is connected to the release pathway of the vehicle braking system, and the air outlet (14) is connected to the atmosphere through a dustproof air exhaust part (22).