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实用新型
CN202209969U 燃气表的防逆安全保护装置 失效 - 权利终止

燃气表的防逆安全保护装置
摘要：
本实用新型公开了一种燃气表的防逆安全保护装置，包括带有进气管（1.1）和出气管（1.2）的壳体（1）；所述的壳体（1）内设有机芯体（2）、阀盖（3）、阀座（4）、膜片组件（5）、拨动轴（6）及拨动轴带动机构；所述的壳体（1）上设有计数器（7），所述的计数器（7）与所述的拨动轴（6）连接；所述的阀座（4）设在机芯体（2）上；所述的阀盖（3）可沿阀座（4）长度方向滑动地设在所述的阀座（4）上；计数器驱动件（7.2）与拨动轴（6）之间设有拨动轴（6）顺时针旋转和逆时针旋转均能带动计数器驱动件（7.2）运转的调节盘（8）。该燃气表的防逆安全保护装置具有防逆流装置且在逆流情况下也能驱动计数器正常计数。
摘要（英）：

The utility model discloses a converting-proof safety protection device of a gas meter, which comprises a casing (1) with an air inlet pipe (1.1) and an air outlet pipe (1.2). A machine core body (2), a valve cover (3), a valve seat (4), a membrane assembly (5), a poke shaft (6) and a poke shaft driving mechanism are arranged in the casing (1), a counter (7) is arranged on the casing (1), the counter (7) is connected with the poke shaft (6), the valve seat (4) is arranged on the machine core body (2), the valve cover (3) can be slidably arranged on the valve seat (4) along the length direction of the valve seat (4), an adjusting plate (8) is arranged between a counter driving member (7.2) and the poke shaft (6), and the adjusting plate can drive the counter driving member (7.2) to operate no matter the poke shaft (6) rotates clockwise or counterclockwise. The converting-proof safety protection device of the gas meter is provided with a backflow prevention device, and can drive the counter to count normally under backflow conditions.

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