Mechanical type timing valve

Abstract

The invention belongs to the technical field of valves, and discloses a mechanical type timing valve. The mechanical type timing valve comprises a mechanical type timer and a valve body. The mechanical type timer comprises a spindle, a timer cam and an escapement speed regulation mechanism, wherein the spindle is driven by a timing spring to reversely rotate, the timer cam is linked with the spindle, and the escapement speed regulation mechanism controls the revolting speed of the spindle. The valve body is driven to open or close by forward rotating or reversely rotating a rotating shaft. A valve closing spring for driving the rotating shaft to reversely rotate is arranged on the rotating shaft. The rotating shaft is in limited linkage with the spindle of the timer through a sector gear. A section gear reset mechanism pushes the dislocated sector gear to draw close to a gear connected with the sector gear. The sector gear has a free rotating angle relative to the rotating shaft. A reverse rotating limiting mechanism which limits the rotating shaft to rotate only in the valve closing direction is triggered to fail by the timer cam of the timer. According to the mechanical type timing valve, time setting and valve opening are combined, and therefore operation convenience is greatly improved; valve opening and timing are rigidly combined, and safety is high.

Description

technical field [0001] The invention belongs to the technical field of valves, relates to the technology of how to realize timing closing of valves, and is mainly applied to valves of gas pipelines. Background technique [0002] The popularity of gaseous fuels in household applications has brought great convenience to people's lives, but some problems have gradually emerged. The most important issue that people pay attention to is the safety issue. For many years, people have focused on the prevention of fuel leakage. However, they have paid attention to the reflection of accidents that have occurred over the years, most of which are caused by valves being forgotten to close. In response to this problem, valves with timing functions have appeared in recent years, but electronic timers are mostly used, but due to the price and other reasons, they have not been popularized in households. And its biggest disadvantage is that when the battery fails, the timing function fails th...

AI Technical Summary

Problems solved by technology

More importantly, the high torque of the clockwork puts a greater burden on the gear set of the escapement speed regulating mechanism, which is easy to cause damage

In addition, in the process of closing the valve port, the gear transmission mechanism between the timer cam and the main shaft also needs to bear greater pressure, which not only requires increased strength, but is also easily damaged

On the other hand, the profile mutation distance of the timer cam is limited, and it is generally difficult to meet the action distance required to close the valve. It is also necessary to use a transmission mechanism such as a lever to transmit and amplify, but the use of a lever will greatly increase the size of the product.

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