Improved inner sand core structure for casting stainless steel mechanical water meter shell
By improving the internal sand core structure and adopting an annular protrusion and transition groove design, the problems of shrinkage and cracking of the pipe opening in the casting of stainless steel mechanical water meter housings have been solved, thereby improving product quality and production efficiency.
Patent Information
- Application Number
- CN202423301404.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During the traditional stainless steel mechanical water meter casing casting process, shrinkage cavities and cracks are prone to occur at the pipe opening, affecting product quality and performance.
An improved internal sand core structure was designed, including an annular protrusion structure and a transition groove, to provide additional molten steel reserve and uniform release of shrinkage stress. The design of the annular protrusion and the flow groove ensures uniform distribution and transition of molten steel during solidification.
It effectively avoids shrinkage cavities and cracks in the pipe orifice, improves product quality and production efficiency, and enhances structural stability and casting efficiency.
Smart Images
Figure CN223684389U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to casting technical field especially relates to stainless steel mechanical water meter shell casting's inner sand core improvement structure. BACKGROUND
[0002] Stainless steel mechanical water meter is a kind of flow measuring equipment widely used in industrial and civil fields, and the quality of its shell directly affects the performance and service life of water meter, and the structural design of inner sand core is crucial to ensure the quality of water meter shell in the casting process, the traditional stainless steel mechanical water meter shell casting inner sand core structure gradually exposes some problems in practical application, which promotes the research and development of its improved structure.
[0003] The prior art adopts the relatively conventional inner sand core structure when casting stainless steel mechanical water meter shell, and the inner sand core is mainly responsible for forming the complex cavity structure inside the water meter shell, including the key parts such as water inlet passage and water outlet passage, and its manufacturing process is generally to make the corresponding core according to the design shape of the water meter shell, and in the casting process, liquid metal is injected into the casting cavity, and after the metal cools and solidifies, the sand core is removed, so as to obtain the rough piece of the water meter shell, and in this process, the forming of the pipe orifice and other parts mainly relies on the natural flow and solidification of liquid metal in the casting mold, and there is no special structure or measure designed for the quality problem of the pipe orifice.
[0004] However, the traditional inner sand core structure is prone to cause quality problems such as shrinkage cavity and shrinkage crack in the pipe orifice when casting stainless steel mechanical water meter shell, because in the cooling and solidification process of molten steel, the pipe orifice part is prone to insufficient feeding due to uneven wall thickness and other factors, and when the molten steel changes from liquid to solid, the volume will shrink, and if there is no additional molten steel to supplement, shrinkage cavity will be formed at the pipe orifice, and uneven shrinkage will also cause stress concentration, and further cause shrinkage crack phenomenon, which seriously affects the quality of the mechanical water meter shell pipe orifice, reduces the product qualification rate, increases the production cost, and may adversely affect the performance and service life of the water meter. UTILITY MODEL CONTENTS
[0005] In order to make up for the above shortcomings, the utility model provides an improved structure of inner sand core for casting stainless steel mechanical water meter shell, which aims to improve the problem that the traditional inner sand core structure is prone to cause shrinkage cavity and shrinkage crack in the pipe orifice when casting stainless steel mechanical water meter shell, and further cause the quality of the mechanical water meter shell pipe orifice to decrease.
[0006] In order to achieve the above object, the utility model provides the following technical scheme: the inner sand core improvement structure of stainless steel mechanical water table shell casting, including the inner sand core body, the inner sand core body is provided with the movement position in the inside, the inner sand core body one end is provided with the water inlet runner, the other end of the inner sand core body is provided with the through diameter water outlet, the outer wall of the inner sand core body is provided with the adjusting assembly, the adjusting assembly is used for providing the additional molten steel reserve, the adjusting assembly includes annular convex structure, the annular convex structure fixedly connected in the outer wall of the inner sand core body, one side of the outer wall of the annular convex structure is provided with the annular groove, the annular groove is used for making the molten steel can gradually transition from the thicker part to the thinner part when solidifying.
[0007] Further, the inner sand core body is internally provided with a transition notch, and the transition notch is located outside the movement position.
[0008] Further, the inner sand core body is internally fixedly connected with an annular column, and the annular column is located at the center of the inner sand core body.
[0009] Further, the annular column is used for filtering the molten steel, and the inner sand core body is internally provided with a flow notch.
[0010] Further, the flow notch is circumferentially arranged outside the annular column.
[0011] Further, one end of the flow notch is provided with an upper flow notch, and the upper flow notch is located at one side of the water inlet runner.
[0012] Further, the other end of the flow notch is provided with a lower flow notch, and the lower flow notch is located at one side of the through diameter water outlet.
[0013] Further, the outer wall of the inner sand core body is provided with a water table shell body, and the water table shell body is formed by pouring the inner sand core body.
[0014] The utility model has the advantages of the following:
[0015] 1. In the utility model, the annular convex structure can provide additional molten steel reserve, effectively supplement the other parts of the through diameter pipe orifice during cooling, effectively solve the problem that the through diameter pipe orifice is prone to shrinkage cavity and shrinkage crack, and the annular groove can make the molten steel transition from the thicker part to the thinner part when solidifying, uniformly release the shrinkage stress, improve the stability of the through diameter pipe orifice cooling crystallization process, thereby improving the quality of the mechanical water table shell pipe orifice, and effectively avoiding the situation that the product quality is low due to the quality problem of the pipe orifice.
[0016] 2、The utility model discloses a through the setting of transition notch, makes the internal sand core internal structure more reasonable, is helpful to the stress distribution balance, reduces the product structure damage risk of the stress concentration cause, strengthens the structure stability of stainless steel mechanical water meter shell, through the setting of flow groove and annular column, makes the molten steel in the pouring process can orderly flow in the whole internal sand core body, improves the pouring efficiency, reduces the forming problem of the molten steel flow not smooth, and further improves the overall production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the three -dimensional structure schematic diagram of the improved structure of internal sand core of stainless steel mechanical water meter shell casting that the utility model provides;
[0018] Figure 2 It is the three -dimensional structure schematic diagram of the improved structure of internal sand core of stainless steel mechanical water meter shell casting that the utility model provides;
[0019] Figure 3 It is the three -dimensional structure schematic diagram of the improved structure of internal sand core of stainless steel mechanical water meter shell casting that the utility model provides;
[0020] Legend:
[0021] 1, internal sand core body;2, water meter shell body;3, movement position;4, water inlet flow channel;5, through -radial water outlet;6, annular convex structure;7, flow notch;8, upper flow groove;9, lower flow groove;10, annular column;11, transition notch;12, annular groove. DETAILED DESCRIPTION
[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0023] Reference Figure 1 - Figure 3The utility model provides an improved structure of the inner sand core of stainless steel mechanical water meter shell casting, including inner sand core body 1, the inside of inner sand core body 1 is provided with machine core position 3, inner sand core body 1 one end is provided with water inlet runner 4, and the other end of inner sand core body 1 is provided with the water outlet 5 of gauge, and the outer wall of inner sand core body 1 is provided with adjusting assembly, and adjusting assembly is used to provide additional molten steel reserve, when the whole stainless steel water meter shell is cooled quickly, crystallization stress is generated between metal interiors, because stainless steel water meter shell is thin -walled part, and the crystallization speed of surface molten steel is fast or uneven, directly will produce the problem of crystallization stress shrinkage, adjusting assembly can play a key role at this moment, adjusting assembly includes annular convex structure 6, and the outer wall of inner sand core body 1 is fixedly connected with annular convex structure 6, by the setting of annular convex structure 6, the molten steel of its outer wall can flow to the peripheral area, effectively supplementing the water inlet of gauge, prevents shrinkage and shrinkage crack from being caused by insufficient supplementing, and the outer wall of annular convex structure 6 is provided with annular groove 12, and annular groove 12 is used to make molten steel be able to gradually transition from thicker part to thinner part when solidifying, because when the stainless steel water meter shell is cooled, through the design of annular groove 12, molten steel can gradually transition from thicker part to thinner part of annular convex structure 6 when solidifying, and this gradual transition mode helps more evenly release shrinkage stress, further improves the stability of the water outlet of gauge in the cooling crystallization process, guarantees the quality of the water outlet of gauge, and the outer wall of inner sand core body 1 is provided with water meter shell body 2, and water meter shell body 2 is formed by pouring inner sand core body 1.
[0024] Referring to Figure 1 - Figure 3 The inside of inner sand core body 1 is provided with transition slot 11, transition slot 11 is located outside machine core position 3, and molten steel enters pouring from one side of the water outlet of gauge, flows through the whole surface of inner sand core body 1, for example, molten steel enters from the direction of the water inlet of gauge, and annular column 10 is fixedly connected in the inside of inner sand core body 1, annular column 10 is located in the center of inner sand core body 1, and annular column 10 is used to transition molten steel, and molten steel will flow along upper flow groove 8 to flow groove 7, to facilitate molten steel to enter and be evenly distributed around annular column 10, and flow groove 7 is provided on the outside of annular column 10, one end of flow groove 7 is provided with upper flow groove 8, upper flow groove 8 is located at one side of water inlet runner 4, the other end of flow groove 7 is provided with lower flow groove 9, and lower flow groove 9 is located at one side of the water outlet 5 of gauge, by the setting of transition slot 11, the inner sand core structure is more reasonable, which helps to balance stress distribution, reduces the risk of product structure damage caused by stress concentration, and enhances the structural stability of the stainless steel mechanical water meter shell.
[0025] Working principle: molten steel enters pouring from one side of the through path, and flows through the entire surface of the inner sand core body 1. Taking the pouring from the water inlet passage 4 as an example, the molten steel enters from the through path water inlet direction, and the molten steel will flow along the upper flow groove 8 to the flow groove opening 7, facilitating the molten steel to enter and be evenly distributed around the annular column 10, and then the molten steel flows along the lower flow groove 9 to the through path water outlet 5 direction, and finally fills the entire surface of the inner sand core body 1. When the entire stainless steel watchcase is rapidly cooled, crystallization stress is generated between the metal interiors. Since the stainless steel watchcase is a thin-walled part, the crystallization speed of the surface molten steel is fast or uneven, which will directly cause crystallization stress shrinkage and shrinkage hole problems. At this time, the adjusting assembly can play a key role. Through the setting of the annular protruding structure 6, the molten steel on the outer wall can flow to the surrounding area, effectively supplementing the through path water inlet, preventing shrinkage and shrinkage from being caused by insufficient shrinkage, and at the same time, through the design of the annular groove 12, the molten steel can gradually transition from the thicker part of the annular protruding structure 6 to the thinner part when solidifying. This gradual transition helps to more evenly release the shrinkage stress, further improving the stability of the through path pipe opening during the cooling and crystallization process, and ensuring the quality of the through path pipe opening.
[0026] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.
Claims
1. An improved structure of an inner sand core for casting a stainless steel mechanical water meter case, comprising an inner sand core body (1), characterized in that: The inner sand core body (1) is internally provided with a machine core position (3), one end of the inner sand core body (1) is provided with a water inlet runner (4), the other end of the inner sand core body (1) is provided with a through diameter water outlet (5), and the outer wall of the inner sand core body (1) is provided with an adjusting assembly; the adjusting assembly is used for providing additional molten steel reserve. The adjusting assembly comprises an annular protruding structure (6) fixedly connected to the outer wall of the inner sand core body (1), and an annular groove (12) is arranged on one side of the outer wall of the annular protruding structure (6); the annular groove (12) is used for enabling the molten steel to gradually transition from a thicker part to a thinner part when solidifying.
2. The improved cast inner sand core of a stainless steel mechanical water table case according to claim 1, characterized in that: The inner sand core body (1) is internally provided with a transition notch (11) located outside the machine core position (3).
3. The improved cast inner sand core for stainless steel mechanical watch case according to claim 1, wherein: The inner sand core body (1) is internally fixedly connected with an annular column (10) located at the center of the inner sand core body (1).
4. The improved cast inner sand core for stainless steel mechanical watch cases according to claim 3, characterized in that: The annular column (10) is used for filtering molten steel, and the inner sand core body (1) is internally provided with a flow notch (7).
5. The improved cast inner sand core for stainless steel mechanical water watch case according to claim 4, wherein: The flow notch (7) is arranged on the outer side of the annular column (10).
6. The improved cast inner sand core of a stainless steel mechanical water table case according to claim 5, wherein: One end of the flow notch (7) is provided with an upper flow groove (8) located on one side of the water inlet runner (4).
7. The improved cast inner sand core of a stainless steel mechanical water table case according to claim 6, characterized in that: The other end of the flow notch (7) is provided with a lower flow groove (9) located on one side of the through diameter water outlet (5).
8. The improved cast inner sand core of a stainless steel mechanical water table case according to claim 1, wherein: The outer wall of the inner sand core body (1) is provided with a water meter shell body (2) formed by pouring the inner sand core body (1).