Jul 04 2014

Characteristics of the solution, the Turbine Woltman Type Water Meter performance parameters, common problems and development

Level Woltman water meter, also called vortex type water meter, water meter refers to the helix axis and the water pipe Zhou Xiancheng parallel (or overlap), the impeller adopts spiral wing shape. This is not to say that the level of the water meter can be installed. Of course, such as the water meter to vertical installation, should the water jewel plain end bearing selection inlet side spiral shaft bearing hole, in order to reduce friction, prolong the service life of the water meter. Imports of some types of spiral wing type water meter adopts dynamic balance technology, can work in horizontal, inclined and vertical state, but the class of measurement work in non horizontal state when the water to reduce the level of.

Turbine Woltman Type Water Meter

In the case, cover, table glass and a sealing washer together to form a sealed body, make the case within the tested water without leakage to the outside. According to the standard requirements, the Turbine Woltman Type Water Meter should be able to withstand the pressure of 1.6MPa, sustained pressure test pressure of 2.OMPa, 15min and 1min continued. Therefore, in the case, cover and table glass shall meet the requirements. The watchcase hole shall be lined with resistant liner rot material made of or coated with antirust coating with good.

Rectifier functions: one is to come from water upstream in turbulent flow in the rectifier through the grid, as far as possible the “out” into the state of laminar flow; two is provided with a shaft hole in the center rectifiers, to support the spiral shaft, axle hole and the shaft hole on the bracket should be coaxial, in order to ensure the spiral wing flexible rotation.

The role of stents: on the one hand supporting the helix axis, so that the spiral wing can rotate flexibly under flow action; on the other hand through a worm and worm wheel bracket and screw wing shaft is engaged, the spiral wing speed to the upper part of the bracket is connected with a counting mechanism.

Water meter Woltman water meter using spiral plate shaped impeller, also called spiral wing or wing wheel, enough mechanical strength engineering plastic generally use (such as ABS) injection molding. Spiral tube body is a hollow, to reduce weight and increase buoyancy. Spiral wing end is provided with a cover adhesive binder and, in case the measured water immersion after the increase of weight. Spiral wing has better dynamic balance performance, or when the high-speed operation, easy to make the spiral shaft and sleeve wear.

Common error adjusting device two.

(1) paddle error adjusting device

In part this adjustment device is a piece of flat and symmetrical paddle shaped adjusting plate, rectifying plate is positioned in the rectifier part. When the rotating paddle shaped adjusting plate, it can increase or decrease this part of water flow to the spiral rotation impact, thus plays the role of error. Paddle shaped error adjusting device has the advantages of Woltman Type Bulk Cold(Hot) Water Meter, less components and easy processing and convenient assembly and disassembly, so widely used.

(2) the rudder type error adjusting device

The regulating device role is part of a flat plate, plate is provided with a shaft hole, the adjusting plate is arranged on the rectifying plate rectifier for shaft parts. The regulation error, a shaft on the other side the rudder shape adjustment plate, so that the adjusting plate around the axis of rotation, to increase or decrease the water flow to the spiral rotation impact, thus plays the role of error. The adjusting device is complex.