Rotary wing type single flow beam calorimeter base meter
A heat meter and rotor-type technology, which is applied in the field of rotor-type single-stream heat meters, can solve the problems of low machining efficiency, difficult shape design, poor manufacturing process, etc.
Inactive Publication Date: 2005-03-16
SHANDONG UNIV
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Problems solved by technology
However, the multi-stream base meter also has its fatal weaknesses. The structure of the water flow channel of the base meter is complex, the manufacturing cost is high, the heating water quality is poor, and it is easy to block, etc.
The single-fluid base meter has simple structure, fewer water flow channel parts, low manufacturing cost, and good anti-blocking performance. The water inlet and the water return port are set eccentrically. This design has many disadvantages. First, the manufacturing process is poor, it is difficult to clamp during machining, the center of the water inlet and return port is not easy to find, and the machining efficiency is low; Difficult, due to the eccentricity of the inlet and outlet, it is not easy to design a beautiful shape
In addition, in order to adjust the pulse equivalent of the traditional single-fluid base meter, the adjustment parts are often specially designed in different positions, which increases the manufacturing cost
Method used
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[0013] Below in conjunction with accompanying drawing, provide preferred embodiment of the present invention:
[0014] attached by figure 1 It can be seen that the base of the impeller chamber 2 is placed at the lower part of the case 1, and the base of the impeller chamber 2 is provided with a guide vane 4, on which are the impeller 5 and the upper cover of the impeller chamber 6, and the uppermost end is the base table for fastening and sealing. Cover 7. When the heat meter is working, the water flows through the deflector 4 and enters the impeller chamber, and the attached figure 2 It can be seen that the cross section of the guide vane 4 can be triangular or other irregular polygons, and its height matches the water inlet of the impeller chamber. The deflector 4 divides the water inlet of the impeller chamber into two channels, one expansion channel and one contraction channel. The continuity equation shows that the flow area is inversely proportional to the flow veloc...
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This invention belongs to the metering device technique field, especially to a rotor single flow heat meter to measure the flow. The invention adopts paddle wheel water-in flow-guiding paddle to form the flow expansion channel and contract channel and to adjust water flow velocity and pressure and to form an effective impact angle to the paddle wheel and to ensure the preset direction of rotation of the paddle wheel. To locate adjusting strips along the radial direction of the upper cover of the paddle wheel which can adjust the impulse equivalent weight through the angle between the strips and the flow direction. The experiment shows that this invention can dramatically improve the measurement accuracy of the basic meter and improve the manufacturability and form design of the basic meter.
Description
Technical field: [0001] The invention belongs to the technical field of metering instruments, in particular to a rotor-type single-stream heat meter base meter for measuring flow. Background technique: [0002] At present, most of the base meters used for flow measurement of heat meters are original hot water meters, and a few self-designed heat meter base meters have appeared. For example, Lianyungang Lianli Water Meter Factory, Ningbo Water Meter Factory and other enterprises have new heat meter base meters. table products. The base table can be divided into multi-stream and single-stream base tables according to the stream form. The multi-flow base meter can make the water flow enter the impeller chamber from the circumferential direction, and the force on the impeller is uniform and symmetrical, the work is reliable and the precision is high. However, the multi-stream base meter also has its fatal weakness. The structure of the water flow channel of the base meter is c...
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IPC IPC(8): G01K17/06
Inventor 杜广生刘正刚林勤春
Owner SHANDONG UNIV