Aug 03 2015

The introduction of horizontal Woltman type water meter

Horizontal Woltman type water meter speed meter, suitable for use in large-diameter pipe, which is characterized by large flow capacity, small pressure loss. When water flows after the water meter along the axis direction of impact around the shaft rotation of the impeller discharge, impeller speed is proportional to the flow velocity, after after the transmission the transmission, displays the total quantity of water through a water meter on the indicating device. Woltman type water meter into horizontal Woltman type water meter and horizontal Woltman type water meter type. Domestic uses most of the tables was horizontal Woltman type water meter for industrial use. Horizontal Woltman type water meter, because of its wide range of measuring flow, parts versatility, installation and maintenance can keep water features, such as the case of the split table, was welcomed by the users. Existing horizontal screw wing mainly consists of both ends, respectively, with detachable water meter inlet and outlet of shell, mount, the former after rectifiers, Rectifier, impellers, drive mechanism and located in Mount detachable connections into the count at the top of table. In the presence of water balanced impellers installed and dangling between the diffuser rotating, which means that the smooth running of the impeller on the water meter range, sensitivity, accuracy and throughput capacity, and other important parameters are affected. Once the axles for excessive wear of the impeller, impeller rotation runout will occur, thus seriously affecting the balance of impeller rotation. Therefore, the impeller shaft wear is also particularly important. Horizontal Woltman type water meter in the existing technical concerns about the rotating impeller equilibrium is not obvious, the existing flows of horizontal Woltman type water meter and the precision is difficult to break, become the bottleneck. And existing technology of horizontal Woltman type water meter casing coated with nature and movement is not good, water concentration through the impeller cannot be guaranteed, and someEffect on the flow of water meters and precision.

The technical problem to be solved by the utility: provides a compact impeller equilibrium of good, good movement between shell and coated, flow capacity greater, more accurate horizontal Woltman type water meter.

This practical new solution above problem by used of technology programme for: a level screw wing type meter, including shell and the movement, by said of movement including installation seat, and Qian rectifier, and Hou rectifier, and impeller, and set Yu installation seat top of count table and the connection impeller and count table Zhijian of drive institutions, by said of Qian rectifier and Hou rectifier respectively set Yu by said of installation seat of two investigation took by said of impeller installation Yu Qian rectifier and the Hou rectifier Zhijian formed of cavity body, by said of impeller of side for and impeller a poses forming of first axle, And the impeller and the first axle is made from PP, the first axle the end near the impeller is a cone-shaped, referred to the second axle is installed tight fit on the other side of the impeller, the second axle is used to drive the worm shaft;
It also including two balance block, two balance block respectively set Yu is located in impeller of sides of installation cavity body; each balance block of Central are has for and first axle or second axle phase sets collection of installation hole, each balance block of within surface are has along radial uniform distribution of more article concave slot, and by said of balance block of outside circle of edge at along by said of concave slot of axis direction has and by said of concave slot connected of multiple square hole;
The impeller blade number is 9, the blade pitch is 350 ~ 400mm, wherein the upper part of the blade close to the side of the second side of the axle with inclined surfaces.
Compared with the existing technology, the advantages of the utility: the impeller side of horizontal Woltman type water meter and one-piece molded the first axle of the impeller and impeller and the first axle are made from PP, first near the impeller axle of a cone-shaped end, so that the first axle torsional strength better, more favourable to the rotation of the impeller equilibrium. This practical new also including respectively set Yu impeller of sides of installation cavity body of two balance block, each balance block of within surface are has along radial uniform distribution of more article concave slot, and balance block of outside circle of edge at along concave slot of axis direction has and concave slot connected of multiple square hole such, can guarantee installation Shi of air can along concave slot from square hole smooth excluded, avoid effect impeller of buoyancy, better to guarantee has impeller turned of balance sex. And when the number of impeller blades 9, blade pitch 350 ~ 400mm blade close to the upper side of the side of the second axle with inclined surfaces, and thus more conducive to maintaining rotating impeller equilibrium.

As optimization, by said of seat body of outside week wall along week to package covered has is u shaped of sealed pad, by said of seat body of outside week wall along week to has convex article, sealed pad of within surface has and seat body of outside week wall phase embedded collection of sealed slot; by said of shell Shang has and sealed pad of shape match and for capacity reset sealed pad of installation slot. This seal will be installed completely coated, and the seal between the casing and are better to ensure water concentration through the impeller further ensures the flow capacity and accuracy of water meters.
As preferred, the upper end of the gasket protruding inward bilaterally symmetrical sets of bumps, the bumps on the inner surface is provided with slots, wherein the body bilaterally symmetrical with the seat plate with used with the card slot compatible card. In this way, gasket and mounting of chimeric closer seal better.
As preferred, the drive mechanism includes a worm’s second axle, shaft and sleeve installed in the lower part of the drive shaft and worm gear in conjunction with worm gearing, which connected to the drive shaft with the count at the top of the table.
As preferred, the side of the mounting hole is provided with holes, position the mounting holes on the other side is provided with columns, and the balance of the first block PIN through holes on the impeller mounted on a second orientation of balancing blocks in holes.
As preferred, described tilt of the surface and the angle between the vertical end face of the impeller is 25 ° ~ 45 °.
As optimization, by said of Qian rectifier and the Hou rectifier Zhijian formed of cavity body near Qian rectifier of location at has Regulation Board, and by said of Regulation Board Shang has regulation block, by said of Qian rectifier of within wall has for card collection regulation block of card mouth, by said of Regulation Board of top through cut surface are Hexagon of connection head and for calibration of Regulation valve phase connection. In this way, can be easily calibrated by adjusting the plate, easy to regulate.

Source: http://asmeter.com/