Today, I will introduce a national invention authorized patent-anti-inversion device for diaphragm gas meter. The patent was applied for by Zhejiang Songchuan Instrument Technology Co., Ltd., and the authorization was announced on February 1, 2017.
Content descriptionThe utility model belongs to the technical field of meters, and relates to a diaphragm gas meter, in particular to an anti-inversion device for a diaphragm gas meter.
Background of the inventionAt present, the well-known civil gas meters are generally diaphragm gas meters. The valve cover and valve seat of the gas meter are important parts of the gas meter. Its function is to distribute the gas from the inlet to the metering chamber and then from the metering chamber to the outlet. For the valve cover, the sealing of the valve cover and the valve seat determines the metering accuracy of the gas meter. In the prior art, the valve cover and the valve seat are sealed by the gravity of the valve cover. When the gas meter is tilted by 30°, the gravity field changes, and the internal valve cover and valve seat of the gas meter are displaced. The gravity sealing principle is destroyed, and part of the gas Leaking from the non-metering room to the outlet causes less metering or even non-metering, resulting in economic losses for the gas supplier.
After some criminals in life grasped the above-mentioned problems in the gas meter, they deliberately installed the gas meter upside down. Due to gravity, the valve cover was separated from the valve seat. When the gas passed through the metering room, the valve cover could not be driven to rotate, so that the counter could not work normally. , Achieved the illegal purpose of stealing air and leaking air. In this case, it is necessary to make the gas meter work normally even when it is inverted, and the anti-inversion gas meter is the product of this situation.
Summary of the inventionThe purpose of the utility model is to solve the above-mentioned problems in the prior art, and propose a membrane gas meter anti-inversion device that can still measure normally even after being tilted or even inverted, and has a good anti-theft effect.
The purpose of the utility model can be achieved by the following technical solutions: the membrane gas meter anti-inverting device includes a valve seat, a valve cover sealingly connected to the upper part of the valve seat, and an adjustment plate arranged above the valve cover. A limit hole is provided on the upper limit hole, and an adjustment buckle is arranged in the limit hole. It is characterized in that the upper part of the valve cover is recessed inward to form a cavity, and the cavity has an upwardly protruding strip installation The middle part of the valve cover has a through hole passing through the installation platform, the installation platform has a groove communicating with the through hole, and the lower part of the adjusting plate has a long length extending into the through hole. Column one, the lower part of the adjusting buckle has a long column two extending into the groove, and an anti-drop structure is provided between the adjusting plate and the valve cover to keep the valve cover in a sealed connection with the valve seat.
In the above-mentioned membrane gas meter anti-inversion device, the anti-dropping structure includes a stopper with one end acting on the adjustment disc, the other end of the stopper acts on the valve cover, the adjustment disc and the valve A fixing unit for fixing the backstop member is arranged between the covers. The stopper is a spring, the above-mentioned fixing unit is the above-mentioned long column one, the spring is sleeved on the long column one, one end of the spring abuts against the adjustment plate, and the other end abuts against On the installation table. There is a gasket abutting on the mounting platform between the adjusting disc and the valve cover, the gasket has a through hole one, the long post is inserted in the through hole one, and the spring The other end abuts against the gasket. The gasket is provided with two through holes, the second long post is penetrated in the through hole two, and the through hole one and the through hole two are arranged to intersect each other.
When in use, put the spring into the long column of the adjustment plate to the end, install the adjustment buckle edge limit hole into the adjustment plate, and then put the washer along the long column 1 and the long column 2 and press it on the spring and insert it as a whole The corresponding position of the valve cover, and the correct installation of other components, the diaphragm gas meter can be used normally. Under the action of springs and gaskets, when installed horizontally, the gas meter will run out normally; when the gas meter is placed upside down, it will still run out normally.
Compared with the prior art, the membrane gas meter anti-inversion device has the following advantages: its structure is simple, easy to install, firm and reliable, and not easy to be damaged. It can avoid the gas theft method of inverted installation of the gas meter, and effectively protect the gas companies and customers. The interests are not harmed.
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