CN-224225048-U - Over-charge prevention device for air distribution valve of railway locomotive

CN224225048UCN 224225048 UCN224225048 UCN 224225048UCN-224225048-U

Abstract

The utility model discloses an overcharge-preventing device for an air distribution valve of a railway locomotive, which comprises an overcharge-preventing valve body I, wherein an overcharge-preventing valve cover is arranged on the overcharge-preventing valve body I, a cavity is arranged in the overcharge-preventing valve cover, an intermediate body is arranged in the overcharge-preventing valve body I, a train pipe passage II and a train pipe passage III are arranged in the overcharge-preventing valve body I, and an overcharge-preventing assembly is arranged in the overcharge-preventing valve body I. Through the setting of preventing overcharging valve body one and preventing overcharging the subassembly, compare with prior art, with this prevent overcharging valve body one install between distribution valve and outside locomotive pipeline interface, prevent in the overcharging the subassembly that the lift of preventing overcharging piston and valve rod reaches the purpose of cutting off and opening the passageway between locomotive train pipe and the distribution valve train pipe through controlling to solve the unusual pressure variation of locomotive train pipe and to the influence of distribution valve work, and then promoted the security of distribution valve, promoted the practicality and the convenience of device effectively.

Inventors

ZHAO ZHIWEI
WANG SHUO
LIU FAN
LIU HUANYU
YANG TINGTING
SUN ZHILEI
SHI YULONG
HE MINGYANG

Assignees

天津中车机辆装备有限公司

Dates

Publication Date: 20260512
Application Date: 20250520

Claims (10)

1. The anti-overcharging device for the railway locomotive air distribution valve is characterized by comprising an anti-overcharging valve body I (1), wherein an anti-overcharging valve cover (2) is arranged on the anti-overcharging valve body I (1), a cavity (3) is arranged in the anti-overcharging valve cover (2), an intermediate body (4) is arranged in the anti-overcharging valve body I (1), a train pipe passage I (5), a train pipe passage II (6) and a train pipe passage III (8) are arranged in the anti-overcharging valve body I (1), and an anti-overcharging component (7) is arranged in the anti-overcharging valve body I (1); The anti-overcharging assembly (7) is composed of an anti-overcharging piston (71) movably connected to the inner wall of the cavity (3), a valve rod (72) mounted on the inner wall of the anti-overcharging piston (71), an annular sealing ring (73) positioned on the outer surface of the valve rod (72), a valve sleeve (74) positioned on the outer surface of the valve rod (72), a compression spring (75) positioned above the anti-overcharging piston (71), a spring support (76) and a pressure adjusting screw (77).
2. An overfill prevention device for a railroad locomotive air distribution valve as set forth in claim 1, wherein said first trainline channel and said second trainline channel (15) are connected to an external locomotive trainline and said third trainline channel (8) is connected to an external distribution valve trainline.
3. The anti-overcharging device for the air distribution valve of the railway locomotive according to claim 1, wherein the spring support (76) is in an inverted convex shape, a protruding portion (9) is arranged in the middle of the upper surface of the spring support (76), the inner diameter of the compression spring (75) is matched with the inner diameter of the spring support (76), and the compression spring (75) is movably connected with the spring support (76).
4. The device for preventing over-charge of an air distribution valve of a railway locomotive according to claim 1, wherein the over-charge prevention piston (71) is hollow and annular, a threaded mounting part (10) is fixedly connected to the upper surface of the over-charge prevention piston (71), one end of the valve rod (72) is in threaded connection with the inner wall of the threaded mounting part (10), and the over-charge prevention piston (71) and the valve rod (72) are in a detachable structure.
5. An anti-overcharging device for an air distribution valve of a railway locomotive according to claim 1, wherein the outer surface of the intermediate body (4) is provided with a channel (11).
6. An anti-overcharging device for a railroad locomotive air distribution valve as in claim 1, wherein the annular seal (73) has a thickness greater than the height of the passageway (11).
7. An anti-overcharging device for a railroad locomotive air distribution valve as set forth in claim 1, wherein the valve stem (72) is sized to fit the interior wall of the valve housing (74), the valve stem (72) being slidably coupled to the interior wall of the valve housing (74).
8. The device for preventing overcharging of an air distribution valve for a railway locomotive according to claim 1, wherein an abutting portion (12) is provided on the upper surface of the overcharge-preventing piston (71), one end of the compression spring (75) abuts against the inner bottom wall of the abutting portion (12), and the compression spring (75) is movably connected in the chamber (3).
9. The device for preventing the over-charge of the air distribution valve of the railway locomotive according to claim 1, wherein a through hole (13) is formed in the middle of the upper surface of the over-charge prevention valve cover (2), an adjusting piece (14) is fixedly connected to the upper surface of the over-charge prevention valve cover (2), a pressure adjusting screw (77) is in threaded connection with the adjusting piece (14), the pressure adjusting screw (77) penetrates through the through hole (13) and the adjusting piece (14) and is abutted to the protruding portion (9), and the first over-charge prevention valve body (1) and the over-charge prevention valve cover (2) are connected through bolts.
10. The device for preventing the over-charge of the air distribution valve of the railway locomotive according to claim 1, further comprising a second over-charge preventing valve body (15), wherein a first working air cylinder passage (16) and a second working air cylinder passage (17) are formed in the second over-charge preventing valve body (15), and the first working air cylinder passage (16) and the second working air cylinder passage (17) are respectively connected with an external locomotive working air cylinder connecting pipe and an external distribution valve working air cylinder connecting pipe.

Description

Over-charge prevention device for air distribution valve of railway locomotive Technical Field The utility model relates to the technical field of locomotive air distribution valves, in particular to an anti-overcharging device of a locomotive air distribution valve. Background When a locomotive of China is connected with an European and sub-economic allied locomotive, the pressure change of a train pipe of the European and sub-economic allied locomotive is different from that of China, so that abnormal conditions such as rapid rise of the pressure of the train pipe to exceed the specified pressure and rapid fall of the pressure of the train pipe beyond the rated working condition of the locomotive air distribution valve of China often occur, abnormal braking of the locomotive air distribution valve of China is caused when the train pipe rapidly descends, the problem needs to be solved, otherwise, when the locomotive air distribution valve of China exits to the European and sub-economic allied countries, traction connection by the locomotives of the countries is inconvenient, and therefore, the design of the device for preventing the abnormal braking of the locomotive air distribution valve of the distribution valve, which can not influence the abnormal braking of the distribution valve when the train pipe of an external locomotive is abnormal, is necessary, so that the abnormal braking phenomenon occurring when the locomotive of China exits to the European and sub-economic allied countries are connected, is solved. Disclosure of utility model In order to overcome the defect that abnormal braking of the locomotive air distribution valve is caused when the locomotive is quickly lowered at the moment in the prior art due to the fact that the pressure of an external locomotive train pipe is quickly raised to exceed the specified pressure and then is quickly lowered and the like and exceeds the rated working condition of the locomotive air distribution valve, the utility model aims to provide an anti-overcharging device for the locomotive air distribution valve. The anti-overcharging device of the air distribution valve of the railway locomotive comprises an anti-overcharging valve body I, wherein an anti-overcharging valve cover is arranged on the anti-overcharging valve body I, a cavity is arranged in the anti-overcharging valve cover, an intermediate body is arranged in the anti-overcharging valve body I, a train pipe passage II and a train pipe passage III are arranged in the anti-overcharging valve body I, an anti-overcharging component is arranged in the anti-overcharging valve body I, and the anti-overcharging component consists of an anti-overcharging piston movably connected to the inner wall of the cavity, a valve rod arranged on the inner wall of the anti-overcharging piston, an annular sealing ring positioned on the outer surface of the valve rod, a valve sleeve positioned on the outer surface of the valve rod, a compression spring positioned above the anti-overcharging piston, a spring support and a pressure adjusting screw. The arrangement of the overcharge prevention assembly facilitates the opening and the cutting of a passage between the distribution valve train pipe and the locomotive train pipe, so that the safety of the distribution valve is improved. According to the over-charge prevention device for the air distribution valve of the railway locomotive, the first train pipe passage and the second train pipe passage are connected with an external locomotive train pipe, and the third train pipe passage is connected with the train pipe of the external distribution valve. And the connection control is convenient. According to the anti-overcharging device of the air distribution valve of the railway locomotive, the spring support is in an inverted convex shape, a protruding portion is arranged in the middle of the upper surface of the spring support, the inner diameter of the compression spring is matched with the inner diameter of the spring support, and the compression spring is movably connected with the spring support. The spring support is arranged to guide the compression spring, so that the compression spring can be supported. According to the over-charging prevention device for the air distribution valve of the railway locomotive, the over-charging prevention piston is hollow and annular, a threaded installation part is fixedly connected to the upper surface of the over-charging prevention piston, one end of the valve rod is in threaded connection with the inner wall of the threaded installation part, and the over-charging prevention piston and the valve rod are in a detachable structure. The valve rod is conveniently installed in the anti-overcharging piston so that the valve rod and the anti-overcharging piston can move simultaneously. According to the over-charge prevention device for the air distribution valve of the railway locomotive, a channel is arranged on the outer surface of t