Energy-saving riser structure
By using the design of rib rings and thermal insulation sand layer in the casting riser structure, the problem of difficult to control the riser cooling speed is solved, more effective replenishment and reduction effect and metal material savings are achieved, and the quality and accuracy of the castings are improved.
Patent Information
- Application Number
- CN202421468389.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-26
AI Technical Summary
In the existing casting process, the cooling speed of the riser is difficult to effectively control, resulting in weakening of the shrinkage effect, increasing consumption of metal materials, and poor insulation effect, which affects the quality and accuracy of the castings.
An energy-saving riser structure is adopted, including the riser main body and the rim surrounding its outside. The rims are spaced to form a filling groove. The entire structure covers the insulation sand layer formed by refractory sand. The thickness of the insulation sand layer at the bottom of the filling groove is greater than that of other places to reduce heat loss.
Through the design of thermal insulation sand layer and rib ring, the cooling speed of liquid metal is effectively delayed, the shrinkage effect is enhanced, the consumption of metal materials is reduced, the production cost is reduced, and the quality and accuracy of castings are improved.
Smart Images
Figure CN222725415U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting, in particular to an energy-saving riser structure. Background Art
[0002] During casting, in order to avoid defects in castings, it is usually necessary to set risers above or on the sides of the castings for shrinkage compensation. Risers are usually divided into open risers and blind risers. Since open risers are in direct contact with the atmosphere and dissipate heat faster, large iron castings often use open risers to compensate for shrinkage during pouring. Among them, if the metal at the riser solidifies while the lower and middle parts of the shell mold are still liquid, the shrinkage compensation effect will be greatly reduced or even disappear due to the negative pressure. Therefore, the liquid metal inside the riser needs to cool later than the casting part to successfully play the shrinkage compensation role.
[0003] In the existing process, in order to help adjust and control the cooling rate at the riser, it is usually necessary to set the upper part of the riser wider (such as Figure 3 As shown in the figure, the metal material consumption at the riser will be increased. Since the formed part of the riser needs to be cut off at the end, it will cause metal waste and increase the production cost to a certain extent. In addition, the outer side of the riser of the existing riser is directly exposed to the air, resulting in rapid heat loss and poor thermal insulation effect. Therefore, the shrinkage compensation effect is also relatively general, resulting in certain defects in the final finished casting, which cannot meet the casting production requirements of high precision and high quality. Utility Model Content
[0004] In view of this, in order to solve the above problems, the utility model provides an energy-saving riser structure.
[0005] An energy-saving riser structure comprises a riser body, wherein the riser body comprises at least one rib ring, wherein the rib ring is arranged around the outer side of the riser body, wherein the inner side of the rib ring is connected to the outer surface of the riser body, wherein the rib rings are arranged at intervals, and wherein filling grooves are formed between adjacent rib rings. The surfaces of the riser body and the rib rings are both covered with a thermal insulation sand layer, and the thickness of the thermal insulation sand layer at the bottom of the filling groove is greater than the thickness of the thermal insulation sand layer on the surface of the rib ring.
[0006] In the above technical solution, the ribs are arranged at intervals around the outer side of the riser body, and the inner side thereof is connected to the riser body. The space between adjacent ribs forms a filling groove. The surface of the riser body and the ribs is covered with a layer of insulating sand layer, and the insulating sand layer is formed of high-temperature resistant refractory sand. When the product is cooled after casting, the insulating effect of the insulating sand layer can effectively delay the cooling rate of the liquid metal inside the riser body, so that the liquid metal at the riser body is cooled last, effectively ensuring the shrinkage compensation effect of the casting and improving the quality of the casting. Among them, the insulating sand layer at the bottom of the filling groove is in direct contact with the riser, and its thickness is greater than the thickness at other positions, which can further slow down the heat loss rate and improve the insulation effect. The multiple ribs can disperse and transfer the heat emitted by the riser body and extend the heat conduction period. The riser has a heat preservation path, which reduces the rate of heat loss, and the surface of the rib ring is also covered with a thermal insulation sand layer, which can further slow down the heat loss and ensure that the liquid metal at the riser is finally cooled. At the same time, the rib ring can also reduce the area of direct contact between the riser body and the air, reduce heat loss, and help delay the cooling of the liquid metal inside the riser body. In addition, in order to help adjust and control the cooling rate at the riser in the existing process, it is usually necessary to set the upper part of the riser wider, which will increase the metal material consumption at the riser to a certain extent and increase certain costs. The present application can reduce the overall size of the riser body while ensuring that the cooling rate meets the requirements through the thermal insulation effect of the thermal insulation sand layer, thereby saving metal materials consumed by the riser during casting, effectively reducing metal waste, saving resources, and reducing costs.
[0007] Among them, the thermal insulation sand layer is formed after the shell mold and the riser are initially manufactured, a layer of refractory sand is covered on the surface of the riser body and the rib ring, and then attached and solidified by glue or other adhesives.
[0008] Further, as a preferred technical solution, the rib ring is provided with one, a retaining rib is provided on the outer side of the rib ring, and the space between the retaining rib and the riser body forms the filling groove.
[0009] In the above technical solution, when only one rib ring is provided, a retaining rib is provided on the side of the top surface of the rib ring away from the riser body, and a filling groove is formed in the space between the retaining rib and the riser body. Since only one rib ring is provided, in order to ensure the thermal insulation effect, the retaining rib is provided to extend the path of heat conducted from the riser body and slow down the heat loss rate. At the same time, the retaining rib can also thicken the thickness of the thermal insulation sand layer between the retaining rib and the riser body to ensure the thermal insulation effect.
[0010] Furthermore, as a preferred technical solution, the retaining rib is arranged perpendicular to the top surface of the rib ring, and the top of the retaining rib is flush with the top of the riser body.
[0011] In the above technical solution, the retaining rib is arranged perpendicular to one side of the top surface of the rib ring, and the top of the retaining rib is flush with the top of the riser body, so that the insulating sand layer in the filling groove can completely cover the entire side of the riser body to ensure the insulation effect.
[0012] Furthermore, as a preferred technical solution, the surface of the retaining bar is covered with the thermal insulation sand layer.
[0013] In the above technical solution, the surface of the retaining bar is also covered with a thermal insulation sand layer to prevent heat from directly contacting the air when conducting along the retaining bar path, thereby effectively slowing down the rate of heat loss.
[0014] Furthermore, as a preferred technical solution, the widths of the upper and lower sides of the riser body are the same.
[0015] In the above technical solution, in order to help adjust and control the cooling rate at the riser in the existing process, it is usually necessary to set the upper part of the riser wider. However, in the present application, through the insulation effect of the insulation sand layer, the width of the upper and lower parts of the riser body are the same, and there is no need to set the upper side of the riser body wider. The overall size of the riser body can be reduced while ensuring that the cooling rate meets the requirements, thereby saving metal materials consumed by the riser during casting, effectively reducing waste and reducing costs. In addition, the riser body with the same upper and lower widths is also easier to process and manufacture.
[0016] Furthermore, as a preferred technical solution, a casting trough is provided on the top surface of the riser body, and a casting hole is opened at the bottom of the casting trough.
[0017] In the above technical solution, the pouring hole is arranged at the bottom of the pouring trough, which is used to pour liquid metal into the riser. The pouring trough can help guide the liquid metal to flow smoothly from the pouring hole into the riser body during pouring, avoiding the liquid metal from overflowing to the outside, thereby ensuring the normal progress of the pouring work.
[0018] Furthermore, as a preferred technical solution, the side wall of the casting trough is an inclined surface, and the width of the top of the casting trough is greater than the width of the bottom.
[0019] In the above technical solution, the side walls of the casting trough are inclined, and the width of the top is greater than the width of the bottom, that is, the cross-sectional shape of the entire casting trough is an inverted cone. The inclined side walls can help guide the liquid metal to flow into the shell mold more smoothly, avoiding violent eddy currents and turbulence during pouring, so that the metal liquid is evenly distributed to each part of the shell mold to ensure the molding effect.
[0020] Furthermore, as a preferred technical solution, a circle of annular grooves is provided at the bottom end of the riser body.
[0021] In the above technical solution, the annular groove is arranged around the bottom end of the riser body. After the casting is formed, the annular groove is narrower than the riser body, which is convenient for cutting and removal.
[0022] Compared with the prior art, this application has the following beneficial effects:
[0023] The present application covers the outer side of the riser body with a thermal insulation sand layer made of refractory sand. The thermal insulation effect of the thermal insulation sand layer can effectively delay the cooling rate of the liquid metal inside the riser body, so that the liquid metal at the riser body is cooled last, effectively ensuring the shrinkage compensation effect of the casting and improving the quality of the casting; a plurality of ribs are arranged on the outer side of the riser body, and the ribs can disperse and transfer the heat emitted by the riser body, and extend the heat conduction path to reduce the rate of heat loss. At the same time, the surface of the ribs is also covered with a thermal insulation sand layer, which can further slow down the heat loss and ensure that the liquid metal at the riser is cooled last. At the same time, the ribs can also reduce the area of direct contact between the riser body and the air, reduce heat loss, and help delay the cooling of the liquid metal inside the riser body; in addition, the present application can reduce the overall size of the riser body while ensuring that the cooling rate meets the requirements through the thermal insulation effect of the thermal insulation sand layer, thereby saving the metal material consumed by the riser during casting, effectively reducing waste, saving resources, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 Schematic diagram of a cross-section of an energy-saving riser structure according to an embodiment.
[0026] Figure 2 It is a cross-sectional schematic diagram of an energy-saving riser structure of another embodiment.
[0027] Figure 3 It is a riser structure in the existing process technology.
[0028] Description of reference numerals in the figures:
[0029] 1- riser body; 11- pouring trough; 12- pouring hole; 13- annular groove; 2- rib ring; 3- retaining rib; 4- filling groove; 5- insulation sand layer; 6- shell mold. DETAILED DESCRIPTION
[0030] The energy-saving riser structure of the utility model will be further described in detail below in combination with specific embodiments and drawings. The drawings are only for illustrative purposes and are only schematic diagrams, not physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Example 1
[0031] Please refer to Figure 1 In a preferred embodiment, an energy-saving riser structure is provided, which includes a riser body 1, the riser body 1 includes a plurality of ribs 2, the ribs 2 are arranged around the outer side of the riser body 1, the inner side of the ribs 2 is connected to the surface of the outer side of the riser body 1, the ribs 2 are distributed at intervals, and filling grooves 4 are formed between adjacent ribs 2. The surfaces of the riser body 1 and the ribs 2 are covered with an insulating sand layer 5, and the thickness of the insulating sand layer 5 at the bottom of the filling groove 4 is greater than the thickness of the insulating sand layer 5 on the surface of the ribs 2.
[0032] The riser structure in this embodiment is usually located at the top of the shell mold 6. When the liquid metal is poured from the riser, the liquid metal can enter and fill the shell mold 6 under the action of gravity. The riser body 1 is provided with a plurality of rib rings 2. The rib rings 2 are arranged around the outer side of the riser body 1 at intervals, and the inner side thereof is connected to the riser body 1. The space between adjacent rib rings 2 forms a filling groove 4. The surface of the riser body 1 and the rib rings 2 is covered with a layer of insulating sand layer 5. The insulating sand layer 5 is formed of high-temperature resistant refractory sand. When the product is cooled after casting, the insulating effect of the insulating sand layer 5 can effectively slow down the cooling rate of the liquid metal inside the riser body 1, so that the liquid metal at the riser body 1 is cooled last, effectively ensuring the shrinkage compensation effect of the casting and improving the quality of the casting. The insulating sand layer 5 at the bottom of the filling groove 4 is in direct contact with the riser, and its thickness is greater than that at other positions, which can further slow down the heat loss rate and enhance the heat preservation effect. The multiple ribs 2 can disperse and transfer the heat emitted by the riser body 1, extend the heat conduction path, and reduce the heat loss rate. The surface of the rib 2 is also covered with the insulating sand layer 5, which can further slow down the heat loss and ensure that the liquid metal at the riser is finally cooled. At the same time, the rib 2 can also reduce the area of direct contact between the riser body 1 and the air, reduce heat loss, and help delay the cooling of the liquid metal inside the riser body 1. In addition, in order to help adjust and control the cooling rate at the riser in the existing process, it is usually necessary to set the upper part of the riser wider (such as Figure 3As shown in ), the metal material consumption at the riser will be increased to a certain extent, which will increase a certain cost. However, the present application can reduce the overall size of the riser body 1 while ensuring that the cooling speed meets the requirements through the insulation effect of the insulation sand layer 5, thereby saving the metal material consumed by the riser during casting, effectively reducing waste, saving resources, and reducing costs.
[0033] It should be noted that the thermal insulation sand layer 5 is formed after the shell mold 6 is initially manufactured, by covering the surface of the riser body 1 and the rib ring 2 with a layer of refractory sand, and then attaching and curing them through the action of glue or other adhesives.
[0034] Preferably, in this embodiment, in order to prevent the liquid metal from bringing part of the refractory sand in the insulating sand layer 5 into the shell mold 6 during pouring, resulting in impurities inside the casting after molding, the top surface of the riser body 1 is not covered with the insulating sand layer 5.
[0035] Please refer to Figure 1 In this embodiment, the widths of the upper and lower sides of the riser body 1 are the same. In order to help adjust and control the cooling rate at the riser in the existing process, it is usually necessary to set the upper side of the riser to be wider. However, in this application, through the insulation effect of the insulation sand layer 5, there is no need to set the upper side of the riser body 1 to be wider. The upper and lower parts of the riser body 1 can be set to the same width. On the premise of ensuring that the cooling rate meets the requirements, the overall size of the riser body 1 can be reduced, thereby saving metal materials consumed by the riser during casting, effectively reducing waste and reducing costs. In addition, the riser body 1 with the same upper and lower widths is also easier to process and manufacture.
[0036] Please refer to Figure 1 In this embodiment, a pouring trough 11 is provided on the top surface of the riser body 1, and a pouring hole 12 is opened at the bottom of the pouring trough 11. The pouring hole 12 is used to pour liquid metal into the interior of the shell mold 6. The pouring trough 11 can help guide the liquid metal to flow smoothly from the pouring hole 12 into the interior of the riser body 1 during pouring, thereby preventing the liquid metal from overflowing to the outside and ensuring the normal progress of the pouring work.
[0037] Please continue to refer to Figure 1 In this embodiment, the side wall of the casting trough 11 is an inclined surface, and the width of the top of the casting trough 11 is greater than the width of the bottom, that is, the cross-sectional shape of the entire casting trough 11 is an inverted cone. The inclined side wall can help guide the liquid metal to flow into the shell mold 6 more smoothly, avoiding violent eddy currents and turbulence during pouring, so that the metal liquid is evenly distributed to each part of the shell mold 6, ensuring the molding effect.
[0038] In other embodiments, the side wall of the casting trough 11 is a curved surface with a certain curvature, which can also meet the need of guiding the liquid metal into the casting hole 12.
[0039] Please refer to Figure 1 In this embodiment, a circle of annular groove 13 is provided at the bottom end of the riser body 1. The annular groove 13 is arranged around the bottom end of the riser body 1. After the casting is formed, the annular groove 13 is narrower than the riser body 1, which is convenient for cutting and removal; specifically, in order to facilitate the subsequent removal work, the annular groove 13 is not covered with the insulating sand layer 5. Example 2
[0040] Please refer to Figure 2 In another preferred embodiment of the present application, in this embodiment, only one rib ring 2 is provided, and a retaining rib 3 is provided on the outside of the rib ring 2. A filling groove 4 is formed in the space between the retaining rib 3 and the riser body 1. Since only one rib ring 2 is provided, in order to ensure the thermal insulation effect, the retaining rib 3 is provided to extend the path of heat conducted from the riser body 1 and slow down the heat loss rate. At the same time, the retaining rib 3 can also thicken the thickness of the thermal insulation sand layer 5 between the retaining rib 3 and the riser body 1 to ensure the thermal insulation effect.
[0041] Please continue to refer to Figure 2 In this embodiment, the retaining rib 3 is arranged perpendicular to one side of the top surface of the rib ring 2, and the top of the retaining rib 3 is flush with the top of the riser body 1, so that the thermal insulation sand layer 5 in the filling groove 4 can completely cover the entire side of the riser body 1 to ensure the thermal insulation effect; specifically, in this embodiment, the thermal insulation sand layer 5 in the filling groove 4 fills the entire filling groove 4 to avoid direct contact between the side of the riser body 1 and the air to ensure the thermal insulation effect of the riser body 1.
[0042] Please refer to Figure 2 In this embodiment, the outer surface of the retaining rib 3 is also covered with a thermal insulation sand layer 5 to prevent heat from directly contacting the air when conducting along the path of the retaining rib 3, thereby effectively slowing down the speed of heat loss.
[0043] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0045] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.
Claims
1. An energy-saving riser structure, comprising a riser body, characterized in that: The riser body includes at least one rib ring, which is arranged around the outer side of the riser body, and the inner side of the rib ring is connected to the surface of the outer side of the riser body. The rib rings are distributed at intervals, and filling grooves are formed between adjacent rib rings. The surfaces of the riser body and the rib rings are covered with an insulating sand layer, and the thickness of the insulating sand layer at the bottom of the filling groove is greater than the thickness of the insulating sand layer on the surface of the rib ring.
2. The energy-saving riser structure according to claim 1, characterized in that: The rib ring is provided with one, and a retaining rib is provided on the outer side of the rib ring, and the space between the retaining rib and the riser body forms the filling groove.
3. The energy-saving riser structure according to claim 2, characterized in that: The retaining rib is arranged perpendicular to the top surface of the rib ring, and the top of the retaining rib is flush with the top of the riser body.
4. The energy-saving riser structure according to claim 3, characterized in that: The surface of the retaining bar is covered with the thermal insulation sand layer.
5. The energy-saving riser structure according to claim 1, characterized in that: The widths of the riser body at the upper and lower sides are the same.
6. The energy-saving riser structure according to claim 1, characterized in that: A pouring groove is arranged on the top surface of the riser body, and a pouring hole is opened at the bottom of the pouring groove.
7. The energy-saving riser structure according to claim 6, characterized in that: The side wall of the casting trough is an inclined surface, and the width of the top of the casting trough is greater than the width of the bottom.
8. The energy-saving riser structure according to claim 1, characterized in that: The bottom end of the riser body is provided with a circle of annular grooves.