Casting flow guide device for metal well lid production

Abstract

The utility model relates to the technical field of metal casting equipment, in particular to a casting flow guide device for metal well lid production, which comprises a flow guide cylinder, the whole flow guide cylinder is of an inverted conical structure, a central column is arranged in the middle of the inside of the flow guide cylinder, and a plurality of main flow distribution plates are distributed on the central column along the circumferential direction. A plurality of main splitter plates are arranged at the upper end of the guide cylinder, a plurality of auxiliary splitter frames which are horizontally distributed are arranged between the adjacent sides of the main splitter plates, a supporting ring is arranged on the inner wall of the upper end of the guide cylinder, a pre-diffusion ring is embedded in the supporting ring, and the main splitter plates, the auxiliary splitter frames and the pre-diffusion ring jointly form a multi-stage dispersion guide mechanism in the guide cylinder. According to the casting flow guiding device for metal well lid production, uniform distribution and stable flow guiding of molten metal are achieved, casting defects are effectively reduced, the yield and production efficiency are improved, and meanwhile the casting flow guiding device is flexible in structure and convenient to maintain and operate.

Description

Technical Field

[0001] This utility model relates to the field of metal casting equipment technology, specifically a casting guide device for the production of metal manhole covers. Background Technology

[0002] Metal manhole covers are common infrastructure components in municipal engineering and industrial facilities, widely used in drainage systems, power and communication wells, and other applications. In the manufacturing process of manhole covers, casting is one of the key technological steps, and its quality directly affects the strength, wear resistance, and service life of the cover. During casting, molten metal is introduced into the mold cavity through a gating system, while the flow guiding device plays a crucial role in controlling the direction, speed, and distribution of the molten metal flow.

[0003] Currently, in the casting process of metal manhole covers, simple straight pipe or funnel-type diversion devices are commonly used. These diversion devices have a simple structure and lack an effective metal liquid dispersion structure inside, which leads to uneven flow rate and large impact force when the metal liquid enters the mold. This can easily cause uneven mold filling, porosity, shrinkage and other casting defects. At the same time, traditional diversion devices are difficult to achieve stable introduction and orderly distribution of metal liquid, which affects the overall quality and yield of manhole cover products. Utility Model Content

[0004] The purpose of this utility model is to provide a casting guide device for the production of metal manhole covers, so as to solve the problems mentioned in the background art, such as uneven flow of molten metal, easy generation of porosity, shrinkage and other casting defects in the current process of casting metal manhole covers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a casting guide device for metal manhole cover production, comprising a guide cylinder, the guide cylinder having an overall inverted conical structure, a central column in the middle of the guide cylinder, a plurality of main diverting plates distributed circumferentially along the central column, and a plurality of horizontally distributed auxiliary diverting frames between adjacent sides of the main diverting plates, and a support ring on the inner wall of the upper end of the guide cylinder, with a pre-diffusion ring embedded in the support ring, the main diverting plates, auxiliary diverting frames and pre-diffusion ring together forming a multi-stage dispersion guiding mechanism inside the guide cylinder.

[0006] Preferably, the main diverter plate has a plurality of guide slots with variable diameter structures, and the diameter of each guide slot is different.

[0007] Preferably, the pre-diffusion ring is surrounded by a plurality of strip-shaped baffles, and each pair of strip-shaped baffles is connected by an arc-shaped baffle, and the gaps between the strip-shaped baffles and the arc-shaped baffles form multiple sets of uniformly distributed overflow channels.

[0008] Preferably, the auxiliary diversion frame is a fan-shaped frame structure, and a number of disturbance plates are uniformly arranged inside it. The disturbance plates have a wave-shaped structure and are distributed at intervals along the radial direction of the fan-shaped frame of the auxiliary diversion frame.

[0009] Preferably, the top edge of the main diverter plate is inclined, and the side edge of the main diverter plate is in contact with the inner wall of the guide cylinder.

[0010] Preferably, there are four main diverter plates outside the central column, and three auxiliary diverter frames are provided between adjacent sides of the main diverter plates.

[0011] Compared with existing technologies, the beneficial effects of this utility model are: the casting guide device for metal manhole cover production achieves uniform distribution and stable flow of molten metal, effectively reducing casting defects, improving yield and production efficiency, while also being flexible in structure and easy to maintain and operate. The guide cylinder of this device, in conjunction with the main diverter plate on the central column and the horizontally distributed auxiliary diverter frames, achieves multi-stage dispersion and stable flow of molten metal. Through the initial diffusion effect of the pre-diffusion ring, the molten metal can be evenly distributed circumferentially after entering the guide cylinder, reducing the initial flow velocity and impact force. The overall structure not only effectively reduces casting defects such as porosity and shrinkage, but also features a reasonable layout and compact structure of each component, facilitating disassembly and maintenance, and possessing good practicality and ease of operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the casting guide device for the production of metal manhole covers according to this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the pre-diffusion ring of a casting guide device for the production of metal manhole covers according to this utility model;

[0014] Figure 3 This is a top view of the connection between the main diversion plate and the auxiliary diversion frame of a casting guide device for the production of metal manhole covers according to this utility model.

[0015] In the figure: 1. Guide cylinder; 2. Central column; 3. Main diverter plate; 301. Guide slot; 4. Auxiliary diverter frame; 401. Disturbance plate; 5. Support ring; 6. Pre-diffusion ring; 601. Strip baffle; 602. Arc baffle. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-3This utility model provides a technical solution: a casting guide device for the production of metal manhole covers, including a guide cylinder 1. The guide cylinder 1 has an overall inverted conical structure. The device is characterized by: a central column 2 located in the center of the guide cylinder 1; several main diversion plates 3 distributed circumferentially around the central column 2; the inner edge of each main diversion plate 3 being welded to the outer wall of the central column 2; and multiple horizontally distributed auxiliary diversion frames 4 between adjacent sides of each main diversion plate 3. Four main diversion plates 3 are located outside the central column 2, and three auxiliary diversion frames 4 are located between adjacent sides of each main diversion plate 3. A support ring 5 is located on the inner wall of the upper end of the guide cylinder 1, and a pre-diffusion ring 6 is embedded in the support ring 5. The main diversion plates 3, auxiliary diversion frames 4, and pre-diffusion ring 6 together form a multi-stage dispersion guiding mechanism inside the guide cylinder 1. In this structure, when molten metal is injected from above the guide cylinder 1, the pre-diffusion ring 6 first performs preliminary dispersion of the flowing molten metal, reducing... The initial flow velocity is evenly distributed throughout the circumferential area of ​​the guide cylinder 1. The molten metal then enters the multi-stage dispersion guiding mechanism composed of the main diversion plate 3 and the auxiliary diversion frame 4. The main diversion plate 3 is fixed by the central column 2 and arranged circumferentially, dividing and guiding the molten metal to different directions. Simultaneously, the auxiliary diversion frames 4 are horizontally distributed between the main diversion plates 3, further diverting and guiding the molten metal, thus forming a multi-level, orderly flow path within the guide cylinder 1. This effectively avoids direct impact of the molten metal on the mold cavity, reducing turbulence and bubble generation. It solves the casting defects such as uneven filling, porosity, and shrinkage caused by uneven molten metal flow velocity and high impact force in existing technologies. The smooth introduction and uniform distribution of molten metal improves casting quality and yield. The main distribution plate 3 has several variable-diameter guide slots 301, each with a different diameter. When the molten metal flows through these slots, each slot can adaptively adjust according to the flow direction and pressure distribution differences, ensuring appropriate velocity and flow rate distribution in different areas. This avoids excessively high local velocities or stagnation, improving the uniformity of the molten metal within the guide cylinder 1 and effectively reducing defects such as eddies and bubble entrapment caused by uneven flow. (Pre-diffusion) The interior of ring 6 is surrounded by several strip-shaped baffles 601. Adjacent ends of the strip-shaped baffles 601 are welded and fixed to the outer wall of the central column 2. Two arc-shaped baffles 602 are connected between each pair of strip-shaped baffles 601. The gaps between the strip-shaped baffles 601 and the arc-shaped baffles 602 form multiple sets of evenly distributed overflow channels. When the molten metal enters the pre-diffusion ring 6 from the upper end of the guide cylinder 1, it first comes into contact with the composite baffle structure formed by the strip-shaped baffles 601 and the arc-shaped baffles 602. Through the linear guiding effect of the strip-shaped baffles 601 and the curved guiding effect of the arc-shaped baffles 602, the flow direction of the molten metal undergoes multiple orderly changes.Simultaneously, multiple sets of uniform overflow channels formed between the strip-shaped baffle 601 and the arc-shaped baffle 602 are used to initially and uniformly divert the molten metal along the circumferential direction, reducing its initial flow velocity and impact force. This not only achieves rapid and uniform diffusion of the molten metal but also effectively avoids direct impact of the molten metal on the lower diversion structure, reducing the generation of turbulence and bubbles. The auxiliary diversion frame 4 is a fan-shaped frame structure with three uniformly arranged disturbance plates 401 inside. The disturbance plates 401 have a wavy structure and are spaced apart along the radial direction of the fan-shaped frame of the auxiliary diversion frame 4. When the molten metal passes through the auxiliary diversion frame 4, the wavy disturbance plates 401 inside generate continuous micro-disturbances on the flowing molten metal. These disturbances effectively break the laminar flow state of the molten metal, allowing the molten metal to be mixed more uniformly when passing through the auxiliary diversion frame 4. The distribution of the flow reduces the phenomenon of excessively fast or slow local flow velocities. Furthermore, since the disturbance plates 401 are spaced apart along the radial direction of the auxiliary diversion frame 4, they can introduce different degrees of disturbance at different radii, further optimizing the uniformity of the molten metal flow throughout the entire guide cylinder 1. The top edge of the main diversion plate 3 is inclined, and the side edge of the main diversion plate 3 is in contact with the inner wall of the guide cylinder 1. This structure allows the inclined edge of the top of the main diversion plate 3 to guide the molten metal smoothly to the surrounding areas, avoiding direct impact or stagnation during flow. Simultaneously, the side edge of the main diversion plate 3 ensures that the molten metal can only be orderly distributed through the guide slots 301 according to the designed path, preventing short-circuit flow or local eddies between the main diversion plate 3 and the guide cylinder 1, thereby improving the overall guiding effect.

[0018] Working principle: When using this casting guide device for the production of metal manhole covers, the molten metal is first injected from the top of the guide cylinder 1. The molten metal flows downward along the inner wall of the guide cylinder 1 and enters the pre-diffusion ring 6 area. The pre-diffusion ring 6 is equipped with strip-shaped baffles 601 and arc-shaped baffles 602. The molten metal flows in the overflow channel between the strip-shaped baffles 601 and the arc-shaped baffles 602, and changes direction under the action of the composite baffle structure, achieving initial dispersion. Subsequently, the molten metal continues to flow downward into the main diversion plate 3 area, and is gradually distributed through the variable diameter guide slot 301 on it. Then, the molten metal enters the auxiliary diversion frame 4 area. The molten metal generates slight disturbances under the action of the disturbance plate 401, achieving further uniform flow. Finally, the molten metal is smoothly and orderly introduced into the mold cavity through the multi-stage dispersion guide mechanism, thus completing a series of operations.

[0019] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A casting guide device for the production of metal manhole covers, comprising a guide cylinder (1), wherein the guide cylinder (1) is integrally inverted conical in shape, characterized in that: The guide cylinder (1) has a central column (2) in the middle, and several main diverter plates (3) are distributed around the central column (2). Several auxiliary diverter frames (4) are arranged horizontally between adjacent sides of the main diverter plates (3). A support ring (5) is provided on the inner wall of the upper end of the guide cylinder (1). A pre-diffusion ring (6) is embedded in the support ring (5). The main diverter plates (3), auxiliary diverter frames (4) and pre-diffusion ring (6) together form a multi-stage dispersion guiding mechanism inside the guide cylinder (1).

2. The casting guide device for metal manhole cover production according to claim 1, characterized in that: The main diverter plate (3) has several guide slots (301) with variable diameter structure, and the diameter of each guide slot (301) is different.

3. The casting guide device for metal manhole cover production according to claim 1, characterized in that: The pre-diffusion ring (6) is surrounded by a number of strip-shaped baffles (601), and each pair of strip-shaped baffles (601) is connected to an arc-shaped baffle (602). The gaps between the strip-shaped baffles (601) and the arc-shaped baffles (602) form multiple sets of uniformly distributed overflow channels.

4. The casting guide device for metal manhole cover production according to claim 1, characterized in that: The auxiliary diversion frame (4) is a fan-shaped frame structure, and a number of disturbance plates (401) are uniformly arranged inside. The disturbance plates (401) have a wave-shaped structure and are distributed at intervals along the radial direction of the fan-shaped frame of the auxiliary diversion frame (4).

5. A casting guide device for metal manhole cover production according to claim 1, characterized in that: The top edge of the main diverter plate (3) is inclined, and the side edge of the main diverter plate (3) is in contact with the inner wall of the guide cylinder (1).

6. The casting guide device for metal manhole cover production according to claim 1, characterized in that: There are four main diversion plates (3) outside the central column (2), and three auxiliary diversion frames (4) are provided on each side adjacent to the main diversion plates (3).

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