Stainless steel water meter shell blank and machining method thereof, stainless steel water meter shell and water meter

Abstract

The invention discloses a stainless steel water meter shell blank and a machining method thereof, a stainless steel water meter shell and a water meter. The machining method comprises the steps of part dismantling, stamping forming, cutting, part machining, assembly, furnace welding and the like. The machining method is characterized in that the to-be-machined blank is decomposed into parts such as a shell male sheet, a shell female sheet and an inner ring; the shell male sheet and the shell female sheet are configured to be of a mirror image structure in plane symmetry, and are matched to form an inner cavity structure of the water meter shell; a containing space for allowing a water meter movement to be arranged is formed in a cavity; the matching relation between the inner ring and theshell male sheet as well as between the inner ring and the shell female sheet is configured into the mode that the plane where a fixing hole of the inner ring is located and the plane where a shell opening is located are parallel or basically parallel; and then stainless steel is used as a material to conduct hydraulic cold punching forming, and finally the shell blank is obtained through assemblyand welding. The water meter is made of the safer stainless steel material, in the machining process, energy consumption is lower, more environmental friendliness is achieved, reusing after recyclingis achieved, and the comprehensive cost is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of water meters, and in particular relates to a stainless steel water meter casing blank and a processing method, a stainless steel water meter casing made by the processing method, and a water meter with the stainless steel water meter casing. Background technique [0002] Water meters are instruments for measuring water flow. Most of them measure the cumulative flow of water. They are generally divided into volumetric water meters and speed meters. The internal structure of the two types of traditional water meters can be divided into three parts: the shell, the sleeve, and the inner core from the outside to the inside. The shell is made of cast iron. After the water comes out of the water inlet, it passes through the lower annular space of the shell, which is called The "lower ring chamber" has an "upper ring chamber" connected to the water outlet above the annular space. There is a filter screen with sm...

AI Technical Summary

Problems solved by technology

[0004] In the existing production technology, most of the shells are made of iron or copper smelted and then cast to obtain blanks. On the one hand, there will be the following problems: First, due to the limitations of the shell structure and casting process, the general shell The thinnest thickness also needs to reach 5-8cm, which will cause the production of the shell to consume a lot of iron or copper, and because of its thickness, both the shell and the water meter will have a large weight, which is not conducive to production , transportation and installation

Secondly, the casting method needs to smelt iron or copper to a liquid state first, which leads to extremely high energy consumption for its production, consumes a lot of energy and produces a lot of greenhouse gases, which is also unfriendly to the environment

Thirdly, since the water meter needs to be in contact with the water source for a long time, the nature of the two substances, iron and copper, determines that they will undergo chemical reactions after long-term contact with water and affect the water quality, which is not good for the use and life of the water meter.

Finally, based on the consideration of water safety, the regulations stipulate that the water meter needs to be replaced after a period of use. Traditional iron and copper water meters need to be disassembled, and the shell needs to be treated a little before being returned to the smelting furnace as the iron source and copper source for recasting. , this regeneration method is not only costly, but also unfriendly to the environment

[0005] Therefore, there is an urgent need for a new type of water meter shell manufacturing process with safer materials and lower production and processing costs, and the Chinese patent with publication number CN103542907A discloses an environmentally friendly high-precision stainless steel water meter and its preparation method. The Chinese patent No. CN105181060A discloses a high-strength and high-life stainless steel water meter and its preparation method. Both of these two patent documents disclose a water meter processing method made of stainless material, but it is mainly welded by laser. The equipment cost is very expensive, which leads to high production cost, which is not conducive to large-scale industrial production; moreover, the performance parameters and product stability of the finished shell have not reached a reasonable commercial level.

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