[Meter's latest patent] photoelectric meter

[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduce a national patent for invention—a photoelectric water meter. The patent was applied for by Ningbo Longge Instrument Co., Ltd. and was authorized on February 8, 2017.

Description of the Invention The utility model relates to the field of water meters, in particular to a photoelectric water meter.

BACKGROUND OF THE INVENTION Water meter is the most important measuring instrument for measuring tap water at home and abroad. The photoelectric water meter has been widely used by users due to its features such as high metering accuracy, small initial flow, convenient meter reading, beautiful appearance, safety and health, and long service life. The head of the photoelectric water meter is generally a sealed structure, including a water meter housing, a window, an upper clamp plate, a transparent plate, and a snap ring. The word window and the upper clamp plate are housed in a water meter housing, and the snap ring covers the transparent plate and the water meter housing. The upper end is fixed, and the transparent plate abuts against the upper surface of the window. The transparent plate and the upper surface of the upper plate are respectively provided with a cavity for accommodating the liquid. The upper plate is provided with a rotating pin on the end face, and the cavity is easy to accumulate when the water meter is calibrated. Bubbles, if the air bubbles stay on the needle, it is easy to produce additional resistance to the rotation of the needle, which affects the sensitivity of the water meter, greatly reduces the metering accuracy, and results in a low qualification rate for water meter verification.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a photoelectric water meter that can prevent the air bubbles from staying on the rotating needle and affecting the sensitivity of the water meter.

The technical solution adopted by the utility model to solve the above problems is: a photoelectric water meter including a water meter housing, an upper clamp plate and a transparent plate, and the upper end surface of the upper clamp plate is spaced from the cavity for accommodating liquid. A pin for rotating inside the cavity to display a reading is provided on the upper surface of the upper clamp plate, characterized in that an upper cover plate is also arranged above the upper clamp plate, and the upper cover plate is provided with a pin for accommodating the rotary needle. Holding hole.


The figure is an overall sectional view of the utility model

Compared with the prior art, the utility model has the advantages that an upper cover plate is arranged between the upper clamp plate and the transparent plate to reduce the height of the cavity, so as to reduce the possibility of air bubbles staying; and the transfer pin is accommodated on the upper cover plate In the receiving hole, even if a bubble stays in the cavity, the bubble floats due to the gravity, and the bubble stays between the upper end surface of the upper cover plate and the lower surface of the transparent plate, and it is not easy to stay in the narrow space between the receiving hole and the rotating pin. Within the gap, to avoid direct contact with the air bubble needle to affect the sensitivity of the needle, increase the metering schedule.

As an improvement of the present invention, the thickness of the upper cover plate is greater than the height of the rotation needle, and through the improvement, the height of the gap between the rotation needle and the accommodation hole is ensured to be lower than the height of the cavity, under the action of gravity, Ensure that residual bubbles stay in the cavity so as not to affect the sensitivity of the needle. The upper cover plate and the upper clamp plate are detachably connected. Through the improvement, the upper cover plate is detachable, and an upper cover plate with different numbers or positions of receiving holes can be replaced to meet the needs of different types of photoelectric water meters.

An inserting post is convexly arranged on the bottom surface of the upper cover plate of the utility model, and a jacking hole for the inserting post is arranged on the end face of the upper clamping plate. Through the improvement, the upper cover plate and the upper clamping plate pass the inserting post and the insertion hole. Detachable connection, easy disassembly and installation, and positioning by inserting posts and jacks, accurate positioning. The outer surface of the upper cover plate is provided with a concave cavity for cooperating with a convex block of the inner circumferential surface of the outer ring of the window to limit the upper cover circumferentially. Through the improvement, the upper cover plate passes through the convex block and the concave cavity. Fit to restrict the top cover from turning circumferentially.

The outer peripheral surface of the upper cover plate is provided with a step for cooperating with a pressing block of the inner peripheral surface of the outer ring of the window to axially limit the upper cover plate. Through the improvement, the upper cover plate is pressed by the pressing force of the pressing block and the step. Fit on the upper clamp plate to avoid axial movement of the upper cover plate.

For more information, please download the full specification of the patent.

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