Wet type direct-reading water meter

Abstract

The invention relates to a wet type direct-reading water meter which directly engaging a pointer display mechanism and a digital display mechanism by adopting a gear transmission structure with the same quick ratio. The water meter is accurate in counting and stable in operation. Driving gears used for driving a plurality of pointers to record the low-grade cumulative water consumption and drivinga plurality of dials to record high-grade cumulative water consumption are sequentially engaged and installed between an upper clamping plate and a lower clamping plate, the pointers and the digitaldials are located in the same plane, and a water meter inner shell is provided with a transparent meter head used for sealing all pointers and digital dials in the inner shell in a waterproof manner.In the scheme, the pointer display mechanism and the digital display mechanism are directly engaged with each other by adopting the gear transmission mechanism with the same quick ratio, so that the coupling clearance between the mechanical parts is enabled to be uniform, the transmission is smooth, and the reading is stable. The digital dials are located in the same plane, the center of each digital dial surface is provided with a permanent magnetic sheet, and no mutual interference is generated between the permanent magnet sheets, so that there is no need to install magnetic shielding sheets.

Description

technical field [0001] The invention relates to a water meter, in particular to a wet-type direct-reading water meter in which a pointer-type reading plate (also known as an indicator plate) and a digital reading plate (also known as a digital turntable) are placed in the same plane. Background technique [0002] In the prior art, the pointer display and digital display functions of the wet direct-reading water meter with digital reading water consumption value are respectively completed by the following mechanisms: [0003] 1. Pointer display mechanism [0004] It is composed of a gear transmission mechanism installed between the upper splint and the lower splint, an indicator plate with 0-9 numbers printed on the upper splint, and a pointer rotating on the indicator plate. Usually, these indicator plates are for recording the low gear. The disk of the cumulative water consumption value of the digit (lower digit is record 10 -4 、10 -3 、10 -2 and 10 -1 A disc with a cub...

AI Technical Summary

Problems solved by technology

[0014] 1) The angular displacement sensor module (including permanent magnet, angular displacement sensor, small circuit board, magnetic shielding sheet and main control circuit board) is complex to assemble and needs to be welded many times

[0015] 2) For the counting of water consumption, the power is converted from the low gear to the high gear by the worm gear, and the gap is large, resulting in a decrease in counting sensitivity. In addition, the counting structure of the digital wheel is complicated (set the drive wheel, several drive shafts and the carry gear structure)

[0016] 3) Since the digital display mechanism is equipped with a circuit structure, it must be installed in a waterproof and sealed structure, but the worm gear is used to transmit power between it and the pointer display mechanism, so the sealing effect is difficult to guarantee

[0017] 4) The accessories in the digital display mechanism and the small circuit board and magnetic shielding sheet in the angular position sensor module all cause a substantial increase in the manufacturing cost of the product, especially the magnetic shielding sheet is not an ordinary shielding sheet, which is expensive imported parts

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