[Chinese instrument network meter patent] creative limit, instrumentation invention. Today we introduce a national patent for invention—a lining structure for ultrasonic water meters. The patent was applied by Ningbo Water Meter Co., Ltd., and it was authorized on August 8, 2017.
The figure is a schematic structural view of an embodiment of the present invention
Content Description
The utility model belongs to the technical field of flow measurement equipment, in particular to a lining structure of an ultrasonic water meter.
Background of the invention
With the widespread use of tap water throughout the world, water meters used to measure water consumption are indispensable tools for tap water use.
Ultrasonic flowmeter is a new type of flow meter developed in recent years. As long as the ultrasonic transmission fluid can be used to measure ultrasonic flow, the internal structure of the ultrasonic flowmeter is only two probes, and there is no pressure loss when used, so it is not affected by media. The impact of high measurement accuracy and use more and more widely. Its working principle is to use time difference method for flow measurement. The time difference method uses the difference between the propagation time of the ultrasonic pulse in the fluid and the countercurrent propagation time to measure the fluid flow rate, thereby calculating the fluid flow in the pipe. Therefore, the precision of the mounting position of the reflection sheet is very high. In the prior art, the installation of the emission sheet is complicated, the positioning is difficult, and it is difficult to ensure the accuracy of the installation of the reflection sheet.
Summary of the Invention
In view of the deficiencies in the prior art, the utility model provides an inner lining structure of an ultrasonic water meter. The inner lining structure is used for mounting a reflection sheet in an ultrasonic water meter measuring tube, and has the advantages of simple structure, convenient installation and accurate positioning.
In order to solve the above technical problems, the utility model is solved by the following technical solutions: An lining structure of an ultrasonic water meter is characterized by comprising a pipe section, and both ends of the outer surface of the pipe section are axially provided with reflectors for installation The guide groove is further provided with a positioning hole for determining its position in the ultrasonic water meter.
The figure is a schematic structural view of an embodiment of the present invention
In the utility model, the pipe segment is accurately positioned in the ultrasonic water meter through the positioning hole, and the reflection piece is fixed in the pipe segment through the guide slot, so as to realize the simple and accurate installation of the reflection plate in the ultrasonic water meter, and at the same time, the pipe segment is realized in the working state. The relative position of the water meter housing does not change, and the ultrasonic signal can be transmitted accurately and stably. Moreover, the structure of the pipe section can realize the installation of the reflection sheet without disturbing the water flow, thereby ensuring the accuracy of the water meter measurement.
Preferably, two ends of the outer surface of the pipe segment are axially provided with a bump, and the guide groove is opened on the bump. On the one hand, the bumps can strengthen the strength of the pipe section, and at the same time reduce the use of materials for the pipe section and reduce the cost.
In order to obtain better technical effects, further technical measures include: the bottom of the inner end of the guide groove is recessed into the interior of the tube section to form a limiting groove. The limit slot cooperates with the reflective sheet to ensure that the reflective surfaces of the two reflective sheets always maintain a relatively correct distance.
Preferably, two guide grooves are respectively distributed at two ends of the pipe section, and the guide grooves are located on the same plane.
Further, a first annular protrusion is formed at the port of the water inlet end of the pipe section. The first bump is in interference fit with the inner wall of the ultrasonic water meter, and the tube is fixed in the ultrasonic water meter stably.
The outer side of the pipe section has a second annular projection, and the second annular projection is provided with a sealing groove for placing a sealing O-ring. Sealing at this location maintains the stability of the internal water flow and maintains the accuracy of the measurement. The inlet and outlet of the above-mentioned pipe section adopts a wide-necked structure, and the diameter of the inlet is larger than that of the outlet. The structure can reduce the diameter of the water flow at the interface and reduce the change in flow characteristics due to the change in diameter.
Compared with the prior art, the utility model has the beneficial effects that the utility model accurately locates the pipe segment in the ultrasonic water meter through the positioning hole, and fixes the reflector in the pipe segment through the guide slot, thereby realizing the simple and accurate reflection sheet. It is installed in the ultrasonic water meter and realizes that the relative position of the pipe segment to the water meter case does not change during the working state, so that the ultrasonic signal can be accurately and stably transmitted, and the structure of the pipe segment can be realized while installing the reflective sheet. It will interfere with the flow of water and ensure the accuracy of the water meter measurement.
For more information, please download the full specification of the patent.
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