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Description of the Invention The present invention relates to a water meter, which is a conductive plastic shell water meter.
BACKGROUND OF THE INVENTION At present, in some countries in Europe and America, it is customary to arrange pipelines as ground lines in order to achieve the purpose of grounding; therefore, water meters in pipelines are often made of copper shell water meters with conductive functions, because the general plastic case can not form conductive functions and realize water pipes. Conductive communication at both ends. However, compared with plastic water meters, copper crust meters are not only costly but also have a higher level of environmental pollution. For this purpose, as disclosed in Chinese patent document, application number 201220239404.2, authorized announcement date 2012.12.26, utility model name "a water meter housing with a lightning protection function"; the water meter housing includes a housing, and two of the housing The end is connected with a nipple through a nut, and a conductive layer is arranged on the shell. Two ends of the conductive layer are respectively connected with the nipple so that the two ends of the nipple form a passage; the conductive layer is provided on the shell of the plastic water meter. The conductive layer is connected to the two ends of the takeover tube, and the two ends of the takeover tube form a passage to prevent the water meter from causing a breakdown phenomenon after being struck by lightning. However, the above-mentioned water meters are mainly realized by conductive paint coatings. Compared with some water meters made of conductive plastics, these water meters are significantly less conductive (<1A) than conductive water meters, and it is difficult to meet most of the pipe connections. The conductive requirements of the ground wire; while the water meter made of conductive plastics costs more than ordinary plastic water meters.
In addition, some existing water meters are volumetric water meters, which are a water meter composed of a known volume that is successively filled and discharged with fluid and a fluid-driven mechanism, or a quantitative discharge type water meter, which generally employs a piston. Structure. The internal working principle is that the piston generates a rotational torque under the differential pressure of the fluid. With the rotation of the piston, the fluid flows from the inlet to the outlet, and the piston rotates eccentrically. During the movement, a volume space is formed between the piston and the measuring cup, so that the water flow fills this space, and as the piston rotates, the fluid is sent to the outlet port. If the space volume is determined beforehand, the rotation of the piston is measured. It is then possible to find the amount of volume given by the space and to find the volume of the flowing water. The above-mentioned volumetric water meter is more convenient to use the all-plastic structure, but its combined conduction band function is less.
SUMMARY OF THE INVENTION In order to overcome the above insufficiency, the purpose of the present invention is to provide a conductive plastic case water meter to the field to solve the technical problems that the existing similar products are not suitable for conducting pipes or poorly conducting electricity.
Its purpose is achieved through the following technical solutions. The utility model relates to a conductive plastic shell water meter. The shell of the plastic shell water meter includes a water plastic shell and a water plastic shell. A casing is provided with a movement. The movement is provided with a digital display mechanism, and the inlet and the outlet of the casing are two. The external ends are respectively provided with external threads; the external threads at both ends of the inlet and outlet ports facilitate the connection of the plastic water meter through the nut and the water pipe, and the flow is measured by the digital display mechanism while the movement is measuring the amount of water. The main point of its structural design is that the external thread of the water-displaced plastic shell is a water-outlet metal thread, the external thread of the water-infiltrated plastic shell is a water-inlet metal thread, and the outer diameter of the shell between the outlet metal thread and the influent metal thread is provided with a conductive sheet. Both ends of the conductive sheet are respectively in contact with the outlet metal thread and the inlet metal thread. The effluent metal thread, the influent metal thread, and the conductive sheet are made of copper material with good conductivity. The effluent metal thread and the influent metal thread are integrated with the water-molded plastic shell and the water-infiltrated plastic shell, thereby realizing the above-mentioned plastic water meter. The conductive function at both ends enhances the technical problem that the existing water meter leads to poor conductivity performance only through both ends of the water flow or the conductive coating. That is, the conductive performance can reach 20A, higher than the conductive plastic water meter, comparable to the copper shell water meter. 
The figure is a schematic structural view of the present invention
The effluent metal thread and the influent metal thread are respectively arranged in the thread sleeve, the inner diameter of the thread sleeve is respectively connected with the outlet hole of the water-molded shell and the outer diameter of the water inlet hole of the water-molded shell through the thread, and the water-plastic shell and the water inlet of the thread sleeve are provided. The outer side of the plastic shell is provided with an outer hexagon ring, and the plastic shell and the plastic shell are all plastic. The above-mentioned is a split type structure between the water outlet metal screw thread, the water inlet metal screw thread and the water outlet plastic shell, and the water inlet plastic shell, so that the plastic shell water meter can be freely used according to whether the conductive sheet is needed or not, and the water outlet hole and the water inlet of the water plastic shell. When the water inlet hole of the water-plastic shell is not fitted with a metal thread sleeve, the plastic water meter surface has a fully-plastic structure, thereby facilitating the recycling of the plastic shell water meter. At the same time, in order to facilitate the matching of the apertures of the water outlet holes and the water inlet holes with the existing nuts, another set of all-plastic threaded sleeves may also be provided to facilitate the further use of the plastic water meter under the all-plastic structure.
The outer diameter of the water outlet hole of the water-molded shell and the outer diameter of the water inlet hole of the water-molded plastic shell are respectively provided with conductive sheet end slots, and the two ends of the conductive sheet are respectively sealed to the shell by a screw sleeve. The above structure facilitates further fixing of the two ends of the conductive sheet with the water-out molded case and the water-infiltrated case, and the two ends of the conductive sheet are sealedly connected with the screw sleeve. At the same time, the above-mentioned structures of the conductive plate end slots can also be respectively arranged on the water outlet metal threads, the water inlet metal threads and the housing, the outlet water metal threads, and the water inlet metal threads.
According to the structural characteristics of the plastic water meter, the external threads of the water-out plastic shell and the water-injected plastic shell may also be plastic threads, the water outlet end surface of the water-molded shell, and the shell between the water inlet end surface of the water-injected plastic shell. The outer diameter of the body is provided with a conductive sheet, and the conductive sheet is respectively contacted with the conductive sheet of the end surface through a metal nut at both ends of the water outlet and the water inlet. The above structure adopts metal nuts respectively to abut against the conductive plates at both ends of the plastic water meter to realize the conduction of the current at both ends of the plastic water meter, and the use and installation methods thereof are relatively simple. The external thread of the water-molded plastic shell is a water-extracting metal thread, the external thread of the water-infiltrated plastic shell is a water-inlet metal thread, and the conductive plastic sheet is respectively provided in the water-out plastic shell and the water-infiltrated plastic shell, and one end of the conductive sheet is respectively separated from the outlet metal thread. , Water inlet metal thread contact, the other end of the conductive sheet of the water plastic shell and the inlet water plastic shell junction is provided with a metal gasket, the metal gasket and the shell on both sides of the conductive sheet conduction, conductive sheet with water plastic shell, water Molded plastic injection into one. The above structure can also achieve the purpose of current conduction at both ends of the molded case water meter, and at the same time, the hermeticity is better.
The movement includes a digital display mechanism, a measuring box and a filter cover. The measuring box is provided with a water inlet channel and a water outlet channel. The measuring box is buckled with the box cover, and the measuring box is screwed into the measuring box through a plastic screw in the center of the cover. Eccentric piston, box cover and metering box are connected together; the digital display mechanism and the box cover abut against each other, and the protruding column of the plastic screw abuts against the shaft of the digital display mechanism. The metering box limit is located at the position where the outlet of the water-filled plastic shell and the water-filled plastic shell are misaligned. The shell mouth of the water-infiltrated plastic shell is provided with a filter cover on the end surface of the metering box at the inlet side of the water-metering box. The inlet channel of the metering box is located at the end face, and an ejector pin is arranged at the center of the end face of the metering box. The above is an all-plastic volumetric water meter movement structure. According to the specific structure of the plastic shell water meter, other rotor structures such as a rotor type and a screw wing type may also be adopted.
The invention has reasonable structure design, good conductive performance, beautiful appearance, convenient assembly, installation and use, low production cost, good environmental protection effect, various structural styles, and is suitable for the conductive connection and flow measurement of the pipeline, and improves the water meter of the same plastic shell. The scope of use, and its further improvement for similar products.
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[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduce a national patent for invention invention - conductive plastic shell water meter. The patent was applied for by Ningbo Emei Instrument Manufacturing Co., Ltd., and it was authorized on October 5, 2016. A section of the conductive sheet between the outer diameter of the outer shell of the water outlet metal thread and the water inlet metal thread is provided with a cover, the cover is buckled with the shell, and is fixedly connected with the shell through the screw. The cover is used to prevent the conductive sheet from being exposed, thereby further enhancing the safety and life of the conductive sheet. The outer edge of one side of the water-infused plastic shell is provided with a guide groove, and the outer edge section of the conductive sheet is engaged with the guide groove. In the above structure, the conductive sheet is further fixed to the housing to prevent the conductive sheet from moving and facilitate installation of the conductive sheet.