Photoelectric direct reading machine for wet type vane wheel water meter

Abstract

The invention relates to a wet-type water meter photoelectric direct reader suitable for a passive photoelectric direct reading wet-type water meter. The wet-type water meter photoelectric direct reader comprises a photoelectric sensor circuit board, a signal processing circuit board, an electric signal lead wire, a character wheel box of a counter, a character wheel of the counter and a bottom cover plate of the character wheel box of the counter, and is characterized in that the character wheel of the counter is coaxially arranged in the character wheel box of the counter; on the position where the character wheel of the counter is arranged in the character wheel box of the counter, a concave and convex chamfer is designed to divide the character wheel box of the counter into two non-enclosed cavities which are not communicated up and down; the lower cavity is used for mounting the character wheel of the counter and transmission parts of the character wheel of the counter; the character wheel of the counter is inserted into a groove from the bottom up; after the assembly is completed, the character wheel box of the counter is enclosed by the bottom cover plate of the character wheel box of the counter, and the cavities are injected with transparent solution; the photoelectric sensor circuit board is arranged on the signal processing circuit board which is fixed in the upper cavity of the character wheel box of the counter; and the photoelectric sensor circuit board is inserted into a groove from the top down, thereby solving the problem of waterproof installation of electronic circuit parts.

Description

Technical field: [0001] The invention relates to a photoelectric direct reading device for wet water meters, which is suitable for passive photoelectric direct reading wet water meters. Background technique: [0002] Water meter is a commonly used water consumption meter. With the development of technology and the improvement of people's living standards, intelligent remote meter reading has become the demand of modern society, and various sending water meters have emerged. From the early pulse Sending water meters and digital water meters have been widely used in water supply systems one after another, which has changed the manual meter reading mode and brought great convenience to users and water supply management departments. [0003] At present, there is a device that reads the reading information of a meter by adding a photoelectric sensor component to the automatic remote meter reading technology, that is, a photoelectric direct reading sensor device, referred to as a ...

AI Technical Summary

Problems solved by technology

The device transforms the counter word wheel of the original mechanical counter device, adopts photoelectric sensor components, converts the indication on the counter word wheel into digital coded signals, and directly outputs the readings to the remote meter reading equipment through the communication interface. The direct reading device does not need power supply at ordinary times, and it only supplies power instantaneously when meter reading is needed, which solves the long-term power supply problem in the previous pulse meter reading system. It is relatively easy to realize the water environment, but it is difficult to realize the water meter, especially the wet water meter. For the wet water meter, it is necessary to solve the waterproof installation problem of the photoelectric sensor circuit board and other electronic circuit components. The current treatment method for the wet water meter is: in the water meter A plastic cavity is made under the counter character wheel box, and the photoelectric sensor circuit board is inserted into the counter character wheel space from bottom to top, and the electronic circuit part is sealed in the cavity through the sealant to isolate it from water. Although this treatment method can solve the problem of the circuit part Waterproof installation problem, but it brings new problems, because the electronic circuit part must be sealed in the cavity and made into one with the mechanical parts of the water meter. Failure of any part will cause the whole to be scrapped, so that the electronic circuit part is not maintainable, the cost is high, the cost is high, and the assembly is complicated, which will increase the cost of use and production, which seriously restricts the passive photoelectric direct reading wet water meter. Promotion

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