One-way rotary multi air-exhaust angle cock door

Abstract

The single-direction-rotation multi-exhaust angle cock comprises main tube joint, soft tube joint, cock body and rotary axle. On the upper part of the cock shell is fitted with a limit stop on which is fitted with a handle seat in which there are pawl and ratchet wheel for controlling the rotation axle to single-direction rotate. A hanger is fitted on the main tube joint. A small sealing ring is provided on the side of the soft tube connection port and a large sealing ring is provided on the side of the main tube connection port. At the lower part of the rotation axle is connected with a core-ball in the cock on both sides of which is respectively provided with a exhaust groove whose length is more than the sealing diameter of the small sealing ring and smaller than that of the large sealing ring. A regulation control exhaust fan is fitted at the bottom of cock shell.

Description

technical field [0001] The invention relates to an on-off valve used in a pneumatic transmission pipeline, in particular to an on-off valve suitable for a train air braking device. Background technique [0002] In railway transportation, it is well known that braking plays an important role in ensuring traffic safety. The braking of railway trains in various countries in the world basically adopts air brake devices, and the brake gas is connected by the air pressure pipeline installed on the train. The angled cock is one of the important components on the main brake line of locomotives and vehicles. It is installed at both ends of the main brake pipes of locomotives and vehicles and equipped with brake hoses. It is used between locomotives and vehicles and vehicles. The other end of the hose is connected with a coupling with a sealing rubber ring. When disassembling, marshalling or overhauling and replacing the sealing ring of the coupling of the train, it is necessary to ...

AI Technical Summary

Problems solved by technology

After Chinese patent search, it was found that the patent number is CN93214462.4, and the utility model patent named double-spherical angle plug door still fails to solve the unavoidable phenomenon of uncontrollable pressure evacuation when the large-displacement solution is closed. Homework creates difficulties

Because the plug door must be opened slowly during normal opening to avoid the high-pressure gas at one end of the plug door quickly rushing to the low-pressure end, causing the pressure drop to break through the limited value. These large-displacement solutions all follow the traditional reciprocating pull within the range of 90°. The operation method of on or off, so the sensitive parts of the train brake system will be triggered when it is turned on, and the pressure of the brake main pipe of the whole train including the locomotive will be emptied, which will seriously affect the punctuality of the train.

The patent number designed by the inventor is CN96115748.8, and the invention patent named "Anti-closing One-way Linkage Corner Plug Door" is also used to discharge the pressure air at one end of the hose with a large displacement for exhaust brake. Measures, the research results prove that when the pressure air at one end of the hose is discharged in one direction, even if the displacement is increased, the braking wave cannot be quickly transmitted to the vehicle close to the locomotive in the direction of the air wave, which can only cause abnormal braking and make normal operation difficult and seriously affect the punctual departure of the train. It cannot automatically eliminate the influence of factors such as tarpaulins, rope hooks, entanglement and dispersion, and escorts climbing and pedaling. There is no research or technical prevention of liability accidents caused by careless maintenance staff. Measures, the solution that must be opened slowly during normal opening and the solution that the secondary exhaust will trigger abnormal braking and discharge the pressure of the main train brake to 0Mpa during maintenance work have not yet been studied, so the technical level of practical application has not yet been reached; The second category is to add mechanical locking or pressure locking equipment on the vehicle, which has not been practically applied because the original vehicle must be refitted and the preventive effect of the evaluation and prediction is not ideal; the third category is various electronic monitoring devices, which have reliable Poor performance, alarm lag, life, economy, maintenance, management and other issues. With the continuous improvement and improvement of the air tightness of the train brake system, the problem of alarm lag will become more serious. When the alarm signal is issued, serious consequences are often unavoidable. It is powerless to prevent man-made sabotage, especially crimes committed by experts. In order to prevent possible instantaneous accidents, the whole process of tracking and monitoring the train will cause huge waste of funds and resources.

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