A welded positive displacement water meter case

Abstract

The utility model provides a kind of welded volumetric water meter shell, belong to water gauge technical field, including, shell main body, installation component, be located in shell main body, wherein: installation component includes water inlet nozzle, water outlet pipe, valve seat, valve rod seat, bottom plate, water outlet nozzle, water inlet hole and water outlet hole, water inlet nozzle fixedly set in the center of the outer wall one side of shell main body, water outlet pipe, water outlet nozzle and shell main body are mutually matched, valve seat is communicated with water outlet pipe arrangement, valve rod seat is embedded in the outer wall top opening of valve seat. Installation component, the welded pure water water meter shell, each component thereof can be individually machined and produced, is easy to produce and prepare, and the material comprehensive cost is low, production process is simple, is convenient for automation production, personnel cost is low, production efficiency is high, dimensional stability is good, the rate of defective product, product consistency is good, and according to the actual demand of customer, installation is provided with the pipe section of valve control function, maximum degree improves practicability and expansibility.

Description

Technical Field

[0001] This utility model belongs to the field of water meter technology, specifically relating to a welded volumetric water meter casing. Background Technology

[0002] The design and manufacturing of traditional volumetric water meter casings generally suffer from the following technical defects: structural complexity and low production efficiency; integrated casting process: existing casings mostly adopt integral casting or one-piece molding design, resulting in high mold costs (usually accounting for more than 40% of production costs), and the entire unit must be scrapped if a single component is damaged, with a material waste rate as high as 20% to 30%; poor processing flexibility: traditional designs cannot achieve rapid replacement of functional modules (such as switching between valve-controlled and non-valve-controlled versions), requiring redesign of molds or adjustment of production lines, extending the production cycle by 30% to 50%; insufficient functional expandability; non-standardized interfaces: most casings use non-standard thread designs for the inlet and outlet nozzles (such as customized pipe diameters or pitches), resulting in poor compatibility with external water pipes or valves, requiring additional adapters during installation, increasing the risk of leakage; difficulty in valve control integration: existing casings lack reserved valve control interfaces (such as internal threads or mounting slots), requiring secondary processing of the casing (such as drilling and welding) when adding solenoid valves or flow regulating devices, which damages structural strength and reduces sealing performance. Utility Model Content

[0003] The purpose of this utility model is to provide a welded volumetric water meter housing, which aims to solve the problems mentioned in the background art.

[0004] A welded volumetric water meter casing, comprising,

[0005] Watch case body;

[0006] The mounting components are located on the main body of the watch case, including: a water inlet, a water outlet pipe, a valve seat, a valve stem seat, a base plate, a water outlet, a water inlet hole, and a water outlet hole. The water inlet is fixedly installed at the center of one side of the outer wall of the main body of the watch case. The water outlet pipe and the water outlet are matched with the main body of the watch case. The valve seat is connected to the water outlet pipe. The valve stem seat is embedded in the top opening of the outer wall of the valve seat. The water inlet hole and the water outlet hole are opened on both sides of the outer wall of the main body of the watch case. The water inlet hole and the water inlet are connected with each other. The water outlet pipe, the water outlet, and the water outlet hole are matched with each other.

[0007] Furthermore, a first internal thread is provided at the top edge of the inner wall of the main body of the watch case.

[0008] Furthermore, a positioning ring is embedded at the top edge of the inner wall of the main body of the watch case.

[0009] Furthermore, a base plate is embedded in the bottom of the inner wall of the main body of the watch case.

[0010] Furthermore, a second internal thread is provided on the inner wall of one end of the valve seat.

[0011] Furthermore, both the inlet and outlet nozzles have external threads at their ends that are far apart from each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The installation components of this welded pure water meter housing are easy to manufacture as individual parts can be processed and produced. The overall material cost is low, the production process is simple, and it is easy to automate production. The labor cost is low, the production efficiency is high, the dimensional stability is good, the defect rate is low, and the product consistency is good. In addition, according to the actual needs of customers, pipe sections with valve control functions can be installed to maximize practicality and expandability. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is an exploded perspective view of the present invention;

[0016] Figure 2 This is a sectional perspective view of the present invention;

[0017] Figure 3 This is a perspective view of the water outlet of this utility model;

[0018] Figure 4 This is a cross-sectional view of the water inlet nozzle of this utility model.

[0019] In the diagram: 1. Main body of the casing; 2. Water inlet; 3. Water outlet; 4. Valve seat; 5. Valve stem seat; 6. Base plate; 7. Water outlet; 101. First internal thread; 102. Positioning ring; 103. Water inlet hole; 104. Water outlet hole; 401. Second internal thread. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-4 The technical solution provided in this embodiment is as follows:

[0024] A welded volumetric water meter casing, comprising,

[0025] Watch case body 1;

[0026] The mounting components are located on the main body 1 of the meter housing. The mounting components include a water inlet 2, a water outlet pipe 3, a valve seat 4, a valve stem seat 5, a base plate 6, a water outlet 7, a water inlet hole 103, and a water outlet hole 104. The water inlet 2 is fixedly installed at the center of one side of the outer wall of the main body 1 of the meter housing. The water outlet pipe 3 and the water outlet 7 are matched with the main body 1 of the meter housing. The valve seat 4 is connected to the water outlet pipe 3. The valve stem seat 5 is embedded in the top opening of the outer wall of the valve seat 4. The water inlet hole 103 and the water outlet hole 104 are opened on both sides of the outer wall of the main body 1 of the meter housing. The water inlet hole 103 is connected to the water inlet 2. The water outlet pipe 3, the water outlet 7, and the water outlet hole 104 are matched with each other.

[0027] In a specific embodiment of this utility model, the installation components can be individually manufactured, making them easy to produce. The overall material cost is low, the production process is simple, facilitating automated production, reducing labor costs, increasing production efficiency, improving dimensional stability, minimizing defect rates, and ensuring product consistency. Furthermore, according to customer needs, pipe sections with valve control functions can be installed, maximizing practicality and expandability. Components such as the inlet nozzle 2, outlet pipe 3, valve seat 4, and valve stem seat 5 are independently manufactured and can be combined as needed. For example, the outlet nozzle 7 can be removed and replaced with a valve-controlled pipe section to meet customer customization requirements for standard or valve-controlled types, enabling rapid functional expansion. The valve seat 4 has a pre-reserved second internal thread 401, allowing direct installation of solenoid valves or other control components without modifying the main structure, providing strong expandability and standardized interfaces. The external threads of the inlet nozzle 2 and outlet nozzle 7 adopt G1 / 2 or NPT standards, ensuring compatibility with mainstream water pipe fittings and high adaptability.

[0028] Specifically, a first internal thread 101 is provided at the top edge of the inner wall of the main body 1 of the watch case.

[0029] In a specific embodiment of this utility model, the first internal thread 101 facilitates the installation and sealing of the watch movement.

[0030] Specifically, a positioning ring 102 is embedded at the top edge of the inner wall of the main body 1 of the watch case.

[0031] In a specific embodiment of this utility model, the positioning ring 102 facilitates subsequent installation and positioning.

[0032] Specifically, a base plate 6 is embedded in the bottom of the inner wall of the main body 1 of the watch case.

[0033] In a specific embodiment of this utility model, a bottom plate 6 is embedded in the bottom of the inner wall of the main body 1 of the watch case, which can ensure sealing and stability.

[0034] Specifically, a second internal thread 401 is provided on the inner wall of one end of the valve seat 4.

[0035] In a specific embodiment of this utility model, the second internal thread 401 can ensure its stable installation.

[0036] Specifically, both the inlet nozzle 2 and the outlet nozzle 7 have external threads at their ends that are far apart from each other.

[0037] In a specific embodiment of this utility model, the ends of the inlet nozzle 2 and the outlet nozzle 7 that are far apart from each other are provided with external threads, which can facilitate the installation of external water pipes.

[0038] Working principle:

[0039] Material Preparation and Pre-treatment: Stainless steel (e.g., 304 / 316L) or copper alloy is selected as the main material to ensure corrosion resistance and weldability. Plate or pipe material is selected according to component function (e.g., thick-walled pipes are required for inlet nozzle 2 and outlet pipe 3). Rough machining of the main body 1 of the component: The housing blank is made using precision casting or stamping processes, with pre-reserved mounting holes (inlet hole 103, outlet hole 104). Inlet nozzle 2 / outlet nozzle 7: External threads and connecting end faces are machined using a CNC lathe to ensure thread accuracy (e.g., G1 / 2 or NPT standard). Valve seat / valve stem seat 5: The second internal... The thread 401 and mounting slot are controlled within a tolerance of ±0.05mm. The base plate 6 is laser-cut or stamped, with chamfered edges for easy embedding into the case. For key component machining, the main body of the watch case is precision-machined, with the first internal thread 101 (e.g., M30×1.5) machined on the top of the case. A CNC thread milling machine is used to ensure coaxiality. Precision fixtures are used for positioning. The base plate 6 is embedded in the bottom of the case and pre-fixed using argon arc welding. Holes 103 and 104 are drilled on both sides of the case to form a water inlet hole 103 and an outlet hole 104, with a hole diameter error ≤0.1mm. A positioning ring 102 is machined for the functional structure and pressed into the inner wall of the top of the watch case using an interference fit. Hydraulic assembly is required. The machine ensures verticality. Valve seat 4 and water outlet pipe 3 are connected by a laser welding machine to ensure the sealing of the internal flow channel. The automated welding process pre-assembles the inlet nozzle 2, water outlet pipe 3, and main body 1 of the meter housing using tooling fixtures. A laser tracking system is used to calibrate the position, and the main weld seam is welded with high precision. TIG welding (tungsten inert gas welding) is used to connect the inlet nozzle 2, water outlet pipe 3, and the housing, controlling heat input to prevent deformation and sealing the weld seam. The joint between the base plate 6 and the housing is fully welded, using pulse welding technology to reduce porosity. Valve seat 4 is welded, and the valve seat 4 and valve stem seat 5 are laser welded to ensure a strong connection. Degree (weld penetration ≥ 1.2mm), post-weld treatment: sandblasting to remove weld slag, electrolytic polishing of the weld to improve corrosion resistance, application of anti-oxidation coating to local areas (such as threaded areas), quality inspection and control: dimensional inspection using a coordinate measuring machine (CMM) to verify housing form and position tolerances (e.g., parallelism between inlet nozzle 2 and outlet nozzle 7 ≤ 0.1mm), thread go / no-go gauge to check the fit accuracy of the first internal thread 101, the second internal thread 401 and the external thread, sealing test: introduce 0.6MPa compressed air, hold pressure for 5 minutes to check air tightness (leakage rate ≤ 0.1mL / min), and perform 1.5 times the working pressure (usually 2).5MPa) water pressure burst test, functional verification simulated installation of the meter core, detection of the fitting accuracy between the positioning ring 102 and the first internal thread 101, test of the linkage function of valve seat 4 and valve stem seat 5 (such as the opening and closing response after adding a solenoid valve), surface treatment and packaging surface treatment overall pickling and passivation treatment (for stainless steel materials), or electroplating nickel layer (for copper alloy materials), key markings (such as water flow direction arrows) are laser marked, modular packaging configuration is selected according to customer needs, standard type retains the water outlet 7 and pre-installed valve seat 4, valve control type removes the water outlet 7 and replaces it with valve stem seat 5 and customized pipe section, EPE foam separation protection is used, the outer box is marked with moisture-proof and anti-collision markings, process advantages cost and efficiency split processing reduces mold costs, the scrap rate of a single part is reduced by 30%, the cycle time of the automated welding line is ≤90 seconds / piece, and the personnel requirement is reduced by 50%, consistency assurance is achieved through tooling and fixture standardization (such as fixing the welding angle of the water inlet to 15°), the product consistency reaches 99.5%, key parameters (such as weld strength) are monitored in real time and fed back to the MES system. .

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welded volumetric water meter casing, characterized in that, include, Watch case body (1); The mounting components are located on the main body of the watch case (1), including: a water inlet (2), a water outlet pipe (3), a valve seat (4), a valve stem seat (5), a base plate (6), a water outlet (7), a water inlet hole (103), and a water outlet hole (104). The water inlet (2) is fixedly located at the center of one side of the outer wall of the main body of the watch case (1). The water outlet pipe (3) and the water outlet (7) are matched with each other. The valve seat (4) is connected to the water outlet pipe (3). The valve stem seat (5) is embedded in the top opening of the outer wall of the valve seat (4). The water inlet hole (103) and the water outlet hole (104) are opened on both sides of the outer wall of the main body of the watch case (1). The water inlet hole (103) is connected to the water inlet (2). The water outlet pipe (3), the water outlet (7), and the water outlet hole (104) are matched with each other.

2. The welded volumetric water meter housing according to claim 1, characterized in that, The top edge of the inner wall of the main body of the watch case (1) is provided with a first internal thread (101).

3. The welded volumetric water meter housing according to claim 2, characterized in that, A positioning ring (102) is embedded at the top edge of the inner wall of the main body of the watch case (1).

4. The welded volumetric water meter housing according to claim 3, characterized in that, The bottom of the inner wall of the main body of the watch case (1) is fitted with a base plate (6).

5. The welded volumetric water meter housing according to claim 4, characterized in that, The valve seat (4) has a second internal thread (401) on the inner wall of one end.

6. The welded volumetric water meter housing according to claim 5, characterized in that, The inlet nozzle (2) and the outlet nozzle (7) are both provided with external threads at their ends that are far apart from each other.

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