A hydropower equipment guide vane casting system and casting method

Abstract

The present invention relates to a guide vane casting system for hydropower equipment, comprising a box body and a sand mold body, wherein the sand mold body is arranged in the box body, the sand mold body comprises at least one gate, at least one riser and a guide vane model, the gate is connected to the guide vane model, the riser is connected to the guide vane model, the guide vane model comprises a guide vane head and a guide vane tail, the height of the guide vane head in the vertical direction is higher than the height of the guide vane tail in the vertical direction, so that the guide vane model is tiltedly arranged in the sand mold body, the riser is arranged in the vertical direction, and forms a first preset angle with the guide vane model. Different from the prior art, the present invention changes the original horizontal casting into tilted casting, which can effectively reduce the consumption of molten iron at the inner gate and the riser, can remove the excess part faster, reduce the difficulty of removing the riser, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a guide vane casting system and a casting method for hydropower equipment. Background Art

[0002] In the prior art, the guide vane casting system of hydropower equipment is mainly composed of an inner gate with water entering from the bottom and three risers. The inner gate enters the water from the bottom of the workpiece, and the three risers are respectively arranged at the shaft head, the head of the plate surface and the tail of the plate surface. Figure 1 and Figure 2 shown.

[0003] More information related to the above technical solution can also be found in the following documents:

[0004] In the patent publication number CN205236972U, a wheel-shaped casting ingate water inlet system is disclosed, including a riser, a casting and an ingate; the riser is located at the upper end of the casting, the ingate is located at the right side of the bottom end of the casting, the ingate is connected to the casting, and the connection angle between the lower end of the ingate and the right side of the bottom end of the casting is 45 degrees; the existing casting ingate water inlet method is generally to vertically upward water inlet from the bottom, and this ingate water inlet method causes the molten steel to vertically upward to a certain height under the action of pressure. After falling, the molten steel is not only easy to re-oxidize, but also the floating sand (slag) gas in the molten steel cannot smoothly enter the top riser and remain inside the casting, causing casting defects. After changing to cutting in at a 45-degree angle from the bottom of the casting, each inner gate is filled with water at a 45-degree angle. The molten steel forms a spiral rise in the cavity. In the process of spiral rising, the molten steel brings the floating sand (slag) gas and other impurities in the molten steel into the riser, thereby eliminating casting defects such as sand (slag) eyes and pores in the casting. The improvement has achieved obvious results.

[0005] In the patent publication number CN102581221A, a method for casting a glass mold without a riser by a single box of green sand is disclosed. In this method, molten iron is poured into the pouring cavity of the pouring mold, and the molten iron enters the bottle mold cavity covered by the cold iron mud core through the filter screen. After the molten iron fills the bottle mold cavity and the molten iron level reaches the height of the upper plane of the pouring cavity and is cooled by the cold iron mud core, the mold frame, the cold iron mud core and the positioning mud core are removed, and the green sand is removed to obtain a glass mold blank with pouring iron; finally, the pouring iron is removed to obtain a glass mold. Since the riser shrinkage is abandoned, the utilization rate of molten iron can be increased to more than 85%, thereby saving raw materials and reducing energy consumption; since the cold iron mud core cover is placed on the bottle mold cavity of the bottle mold, the cold shock effect of the bottle mold cavity is good, which is conducive to improving the smoothness of the mold cavity surface and the parting surface, thereby improving the density of the contact surface between the glass melt and the mold.

[0006] In the process of implementing the present invention, the inventors found that the prior art has the following problems:

[0007] In the prior art, the model to be processed is generally arranged horizontally or vertically, the ingate is located at the bottom of the model to be processed, and the riser is located at the upper end of the model to be processed. This ingate method is that water enters vertically upward from the bottom, and the riser and the model are in a vertical relationship, which requires more molten iron. The subsequent gas cutting to remove the riser also requires more processing time and processing cost. It is difficult to remove the riser, which is not conducive to production. Summary of the invention

[0008] To this end, it is necessary to provide a hydropower equipment guide vane casting system and casting method to solve the technical problems in the prior art that the riser and the model are in a vertical relationship, more molten iron needs to be consumed, and subsequent gas cutting to remove the riser also requires more processing time and processing costs, and it is difficult to remove the riser, which is not conducive to production.

[0009] To achieve the above object, the inventor provides a hydropower equipment guide vane casting system, comprising:

[0010] The housing; and

[0011] A sand mold body, wherein the sand mold body is arranged in the box body, the sand mold body comprises at least one pouring gate, at least one riser and a guide vane model, the pouring gate is connected with the guide vane model, the pouring gate is used to pour molten iron into the guide vane model, the riser is connected with the guide vane model, the riser is used to discharge gas, the guide vane model comprises a guide vane head and a guide vane tail, the height of the guide vane head in the vertical direction is higher than the height of the guide vane tail in the vertical direction, so that the guide vane model is tiltedly arranged in the sand mold body, the riser is arranged along the vertical direction, and forms a first preset angle with the guide vane model.

[0012] Different from the prior art, the above technical solution includes a guide vane head and a guide vane tail through a guide vane model, wherein the height of the guide vane head in the vertical direction is higher than the height of the guide vane tail in the vertical direction, so that the guide vane model is tiltedly arranged in the sand mold body, and the riser is arranged in the vertical direction and forms a first preset angle with the guide vane model. In this way, since the guide vane model is tiltedly arranged in the sand mold body, an angle is formed between the inner gate and the guide vane model, and the riser and the guide vane model form a first preset angle, and the original horizontal casting is changed to inclined casting, which can effectively reduce the consumption of molten iron at the inner gate and the riser. When the inner gate and the connection between the riser and the guide vane are subsequently removed by gas cutting, the excess part can be removed faster, reducing the difficulty of removing the riser and improving production efficiency. In addition, inclined casting can enhance the shrinkage compensation effect, strengthen the sequential solidification of molten iron, and facilitate the floating of slag sand in the direction of the riser.

[0013] As an embodiment of the present invention, the sand mold body includes a first riser, the first riser is connected to the guide vane head, the first riser is arranged at a second preset angle with the central axis of the guide vane model, and the first riser can be used to horizontally supplement molten iron to the plate surface of the guide vane head of the guide vane model.

[0014] In this way, the original first riser is parallel to the central axis of the guide vane model, but now it is changed to be set at a second preset angle with the central axis. Since the guide vane model is set at an angle, the molten iron may not flow to the head plate surface of the guide vane model. At this time, the molten iron can be supplemented to the head plate surface of the guide vane through the first riser to avoid the situation that the guide vane head plate surface has a gap. At the same time, the shrinkage feeding channel can be increased to strengthen the shrinkage feeding of the central axis of the guide vane model, otherwise the shrinkage feeding channel is insufficient and the shrinkage feeding is not good.

[0015] As an implementation manner of the present invention, the second preset angle is 25° to 35°.

[0016] In this way, by setting the second preset angle to 25° to 35°, it is convenient to replenish molten iron on the head plate surface of the guide vane, and to facilitate the subsequent cleaning processing of the connection of the riser.

[0017] As an implementation manner of the present invention, the number of the risers is two, the two risers are respectively a first riser and a second riser, the first riser is connected to the guide vane head, and the second riser is connected to the guide vane tail.

[0018] In this way, the original three risers are changed to the current two risers, which not only reduces the molten iron consumption and increases the export rate by 8-10%, but also reduces the subsequent gas cutting processing time and processing cost, further improving production efficiency.

[0019] As an embodiment of the present invention, the gate is communicated with the bottom side of the guide vane model.

[0020] In this way, the water entry direction of the ingates is changed from bottom entry to side entry, which is convenient for the elimination of the connection between the ingates and the guide vanes and the subsequent processing of the guide vanes. In addition, changing the water entry from the bottom to the side can change the temperature distribution of the molten steel in the guide vane model cavity, forming a temperature gradient, which is beneficial to the riser shrinkage compensation.

[0021] As an embodiment of the present invention, more than two inner gates are provided on the bottom side of the guide vane model, and the inner gates are connected to the gate.

[0022] In this way, the pouring of the guide vane model can be accelerated by using more than two inner gates, and the overall pouring efficiency is improved.

[0023] As an embodiment of the present invention, the guide vane model further includes a shaft head, the shaft head is connected to the guide vane head, an external chiller is arranged on the shaft head, and the external chiller is used to supplement molten iron.

[0024] In this way, since the guide vane model is set at an angle, the molten iron may not flow into the shaft head of the guide vane model, resulting in gaps and depressions at the shaft head. An external chiller is provided on the shaft head to supplement the molten iron and avoid gaps and depressions at the shaft head.

[0025] As an implementation manner of the present invention, the guide vane model is a paddle-shaped guide vane model, and the size of the guide vane head is greater than the size of the guide vane tail.

[0026] In this way, ordinary guide vanes are a structure that is large in the middle and small at both ends, while the paddle-shaped guide vanes are a structure that is small at the tail and large at the head. Since the guide vane model is set at an angle, the structure of the tail is relatively thick and heavy, while the structure of the head is relatively thin and light. The tail is often in contact with more water flow, which can increase the service life.

[0027] As an implementation manner of the present invention, a slope of 1:12 is formed between the guide vane model and the horizontal plane.

[0028] In this way, a slope of 1:12 is formed between the guide vane model and the horizontal plane, so that the entire guide vane model is tilted to facilitate subsequent processing.

[0029] To achieve the above object, the inventors also provide a method for casting a guide vane of a hydropower equipment, comprising the following steps:

[0030] Produce a hydropower equipment guide vane casting system as described in any one of the above inventors,

[0031] The heated molten iron is poured into the guide vane casting system of the hydropower equipment, and the molten iron is taken out after solidification to obtain the guide vane.

[0032] Different from the prior art, the casting method of the above technical scheme forms an angle between the ingates and the guide vane model due to the guide vane model being tilted in the sand mold body, and a first preset angle is formed between the riser and the guide vane model, and the original horizontal pouring is changed to inclined pouring, which can effectively reduce the consumption of molten iron at the ingates and risers. When the connection between the ingates and the risers and the guide vanes is subsequently cleared by gas cutting, the excess parts can be cleared faster, reducing the difficulty of clearing the risers and improving production efficiency.

[0033] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0035] In the drawings of the specification:

[0036] Figure 1 This is a schematic diagram of the structure of the guide vane of the hydropower equipment in the background technology of this application;

[0037] Figure 2 It is a structural schematic diagram of a guide vane casting system for hydropower equipment in the background technology of this application;

[0038] Figure 3 This is a structural schematic diagram of a guide vane casting system for hydropower equipment according to an embodiment of the present application;

[0039] Figure 4 A three-dimensional diagram of a guide vane casting system for a hydropower equipment according to an embodiment of the present application;

[0040] Figure 5 It is a partial schematic diagram of a guide vane casting system for a hydropower equipment according to one embodiment of the present application.

[0041] The reference numerals in the above drawings are described as follows:

[0042] 1. Box body,

[0043] 21. Gate,

[0044] 211. Ingate,

[0045] 22. Riser,

[0046] 221. The first riser,

[0047] 222. Second riser,

[0048] 231. Guide vane head,

[0049] 232. Guide vane tail,

[0050] 233. Central axis,

[0051] 234, side view,

[0052] 235, shaft head,

[0053] 236. External cold iron. DETAILED DESCRIPTION

[0054] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0055] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0056] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0057] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0058] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0059] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0060] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0061] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0062] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] The inventors found that in the prior art, the model to be processed is generally arranged horizontally or vertically, the ingate is located at the bottom of the model to be processed, and the riser is located at the upper end of the model to be processed. This ingate method is that water enters vertically upward from the bottom, and the riser and the model are in a vertical relationship, which requires more molten iron. The subsequent gas cutting to remove the riser also requires more processing time and processing cost. It is difficult to remove the riser, which is not conducive to production.

[0064] See also Figures 1 to 5The present embodiment is a guide vane casting system for hydropower equipment, comprising a box body 1 and a sand mold body, the sand mold body being arranged in the box body 1. In the present embodiment, the sand mold body is formed by solidifying sand and is a concave mold. The sand mold body comprises at least one pouring gate 21, at least one riser 22 and a guide vane model, the pouring gate 21 is connected to the guide vane model, the pouring gate 21 is used to pour molten iron into the guide vane model, the riser 22 is connected to the guide vane model, the riser 22 is used to discharge gas, the guide vane model comprises a guide vane head 231 and a guide vane tail 232, the height of the guide vane head 231 in the vertical direction is higher than the height of the guide vane tail 232 in the vertical direction, so that the guide vane model is tiltedly arranged in the sand mold body, the riser 22 is arranged along the vertical direction, and forms a first preset angle with the guide vane model.

[0065] It should be noted that the guide vane head 231 and the guide vane tail 232 are only a relative concept, and their purpose is to make the guide vane model tilted. As long as the guide vane model can be processed and tilted in the sand mold body, it is within the protection scope of this embodiment.

[0066] In this embodiment, the guide vane model includes a guide vane head 231 and a guide vane tail 232, and the height of the guide vane head 231 in the vertical direction is higher than the height of the guide vane tail 232 in the vertical direction, so that the guide vane model is tilted in the sand mold body, and the riser 22 is arranged in the vertical direction and forms a first preset angle with the guide vane model. In this way, since the guide vane model is tilted in the sand mold body, an angle is formed between the inner gate 211 and the guide vane model, and the riser 22 and the guide vane model form a first preset angle, and the original horizontal casting is changed to tilted casting, which can effectively reduce the consumption of molten iron at the inner gate 211 and the riser 22. When the connection between the inner gate 211 and the riser 22 and the guide vane is subsequently removed by gas cutting, the excess part can be removed faster, reducing the difficulty of removing the riser 22 and improving production efficiency. In addition, tilted casting can enhance the shrinkage compensation effect, strengthen the sequential solidification of molten iron, and facilitate the floating of slag sand in the direction of the riser.

[0067] In this embodiment, the riser shrinkage feeding principle is as follows: in the casting, the cavity of the riser is a cavity for storing liquid metal, which is used to supply metal when the casting is formed, and has the functions of preventing shrinkage cavities, shrinkage, exhaust and slag collection. The main function of the riser is shrinkage feeding. The basic conditions for universal riser shrinkage feeding Universal risers comply with the basic conditions of sequential solidification. Sequential solidification is to establish a gradually increasing temperature gradient from the part away from the riser to the riser on the casting, so as to realize sequential solidification from the part away from the riser to the riser, that is, the part away from the riser solidifies first, and the part close to the riser solidifies later, and the riser itself solidifies last.

[0068] In this embodiment, the original horizontal pouring is changed into inclined pouring, which can effectively enhance the shrinkage compensation effect of the riser, strengthen the sequential solidification of molten iron, and facilitate the floating of slag sand toward the riser.

[0069] In some embodiments, Figures 3 to 5 As shown, the sand mold body includes a first riser 221, the first riser 221 is connected to the guide vane head 231, the first riser 221 and the central axis 233 of the guide vane model are set at a second preset angle, and the first riser 221 can be used to horizontally supplement the plate surface of the guide vane head 231 of the guide vane model with molten iron. In this way, the original first riser 221 and the central axis 233 of the guide vane model are parallel, and now the first riser 221 and the central axis 233 are set at a second preset angle. Since the guide vane model is set to an inclined setting, the molten iron may not flow to the head plate surface of the guide vane model. At this time, the molten iron can be supplemented to the head plate surface of the guide vane through the first riser 221 to avoid the situation that the guide vane head 231 plate surface has a gap. At the same time, a shrinkage compensation channel can be added at the first riser 221 to strengthen the shrinkage compensation of the central axis of the guide vane model, otherwise the shrinkage compensation channel is insufficient and the shrinkage compensation is not good.

[0070] In some embodiments, the second preset angle is 25° to 35°. Specifically, in this embodiment, the second preset angle is 30°, but it is not limited thereto, as long as the first riser 221 and the central axis 233 can be tilted to facilitate the replenishment of the head plate surface of the guide vane. In this way, the second preset angle is 25° to 35°, which facilitates the replenishment of molten iron on the head plate surface of the guide vane and facilitates the subsequent cleaning of the connection of the riser 22.

[0071] In some embodiments, there are two risers 22, which are a first riser 221 and a second riser 222. The first riser 221 is connected to the guide vane head 231, and the second riser 222 is connected to the guide vane tail 232. In this way, the original three risers 22 are changed to the current two risers 22, which not only reduces the consumption of molten iron and increases the export rate by 8-10%, but also reduces the subsequent gas cutting processing time and processing cost, further improving production efficiency.

[0072] In some embodiments, the gate 21 is connected to the bottom side 234 of the guide vane model. In this way, the water entry direction of the inner gate 211 is changed from the bottom water entry to the side 234 water entry, which is convenient for the elimination processing of the connection between the inner gate 211 and the guide vane, and convenient for the subsequent processing of the guide vane. In addition, changing the water entry from the bottom to the side water entry can change the temperature distribution of the molten steel in the guide vane model cavity, forming a temperature gradient, which is conducive to shrinkage compensation at the riser.

[0073] In some embodiments, the bottom side 234 of the guide vane model is provided with more than two ingates 211, and the ingates 211 are connected to the gate 21. In this way, the pouring of the guide vane model can be accelerated by more than two ingates 211, and the overall pouring efficiency is improved. In this embodiment, the number of ingates 211 is 4, but it is not limited to this, and the speed at which molten iron enters the guide vane model can be increased, thereby improving the pouring efficiency. The cross-sectional area of ​​the connection between the ingates 211 and the guide vane model is small, and the cross-sectional area of ​​the connection between the riser and the guide vane model is large.

[0074] In some embodiments, the guide vane model also includes a shaft head 235, the shaft head 235 is connected to the guide vane head 231, and an external chiller 236 is provided on the shaft head 235, and the external chiller 236 is used to supplement the molten iron. In this embodiment, the external chiller 236 and the molten iron used for casting are made of the same material. During the casting process, since the temperature of the molten iron is still there, the external chiller 236 can be melted, thereby supplementing the iron on the shaft head 235. In this way, since the guide vane model is tilted, the shaft head 235 of the guide vane model may not have the molten iron flowing to the right place, resulting in a gap or depression at the shaft head 235. By providing an external chiller 236 on the shaft head 235, the external chiller 236 is used to supplement the molten iron, thereby avoiding the gap or depression at the shaft head 235.

[0075] In some embodiments, the guide vane model is a boat-paddle-shaped guide vane model, and the size of the guide vane head 231 is larger than the size of the guide vane tail 232. In this embodiment, the guide vane produced is different from the ordinary guide vane in structure, and is an improved version of the ordinary guide vane, which can effectively improve the service life of the guide vane. In this way, the ordinary guide vane is a structure with a large middle and small ends, while the boat-paddle-shaped guide vane is a structure with a small tail and a large head. Since the guide vane model is tilted, the structure of the tail is relatively thick and heavy, and the structure of the head is relatively thin and light. The tail is often in contact with more water flow, which can improve the service life.

[0076] It is worth mentioning that the present embodiment does not limit the specific structure of the guide vane model. As long as the guide vane can be manufactured by the above-mentioned mold, it is within the protection scope of the present embodiment.

[0077] In some embodiments, the guide vane model forms a slope of 1:12 with the horizontal plane. Thus, by forming a slope of 1:12 with the horizontal plane, the entire guide vane model is tilted, which facilitates subsequent processing.

[0078] This embodiment also relates to a method for casting a guide vane of a hydropower equipment, comprising the following steps:

[0079] To produce the above-mentioned guide vane casting system for hydropower equipment,

[0080] Pour the heated molten iron into the guide vane casting system of the hydropower equipment, take it out after the molten iron solidifies, and obtain the guide vane.

[0081] In this embodiment, the method for casting the guide vane of the hydropower equipment is specifically as follows: first, the sand box mold needs to be made in advance, a sand mixer for sand mixing is used, sand is poured into the sand grabbing bucket, the sand grabbing bucket is transported by a lifting tool, and poured into the sand box, the molding sand is molded with a coagulant, and a pouring mouth 21 and a riser 22 are left, and the excess sand is blown out by a sand cleaning tool. After the molding is completed, the steel slag is added to the medium frequency furnace to smelt iron. After smelting, the molten iron is added to the ladle and finally poured into the sand box. After solidification for a period of time, the guide vane is poured out and cooled. The pouring mouth 21 and the riser 22 are cut and processed by a gas cutting tool. The guide vane is processed, first the surface sand layer is removed, then the pouring mouth 21 and the riser 22 are cut, and then the shot blasting and electric welding machine are used to repair defects, and the flash, burrs, and electric welding scars are polished. Then annealing treatment is performed, and the workpiece is finely polished to remove the oxide layer after annealing, and then classified, inspected and put into storage, and finally machined and finely finished.

[0082] Different from the prior art, the casting method in this embodiment, since the guide vane model is tiltedly arranged in the sand mold body, an angle is formed between the ingates 211 and the guide vane model, and a first preset angle is formed between the riser 22 and the guide vane model, and the original horizontal pouring is changed to inclined pouring, which can effectively reduce the consumption of molten iron at the ingates 211 and the risers 22. When the connection between the ingates 211 and the risers 22 and the guide vanes is subsequently cleared by gas cutting, the excess parts can be cleared faster, thereby reducing the difficulty of clearing the risers 22 and improving production efficiency.

[0083] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A guide vane casting system for hydropower equipment, characterized in that: include: Box; as well as A sand mold body, wherein the sand mold body is arranged in the box body, the sand mold body comprises at least one pouring gate, at least one riser and a guide vane model, the pouring gate is connected with the guide vane model, the pouring gate is used to pour molten iron into the guide vane model, the riser is connected with the guide vane model, the riser is used to discharge gas, the guide vane model comprises a guide vane head and a guide vane tail, the height of the guide vane head in the vertical direction is higher than the height of the guide vane tail in the vertical direction, so that the guide vane model is tiltedly arranged in the sand mold body, the riser is arranged along the vertical direction, and forms a first preset angle with the guide vane model; The sand mold body includes a first riser, the first riser is arranged at a second preset angle with the central axis of the guide vane model, and the first riser can be used to horizontally supplement molten iron to the plate surface of the guide vane head of the guide vane model; There are two risers, the two risers are respectively a first riser and a second riser, the first riser is connected to the guide vane head, and the second riser is connected to the guide vane tail; The gate is connected to the side of the bottom of the guide vane model. The bottom side of the guide vane model is provided with more than two inner gates, and the inner gates are connected to the gate. The number of the inner gates is 4; The guide vane model also includes a shaft head, which is connected to the guide vane head. An external chiller is provided on the shaft head. The external chiller is used to supplement the molten iron. The material of the external chiller is the same as that of the molten iron used for pouring. During the pouring process, since the temperature of the molten iron is still there, the external chiller can be melted to supplement the iron on the shaft head. The guide vane model is a paddle-shaped guide vane model, and the size of the guide vane head is larger than the size of the guide vane tail.

2. The guide vane casting system for hydropower equipment according to claim 1, characterized in that: The second preset angle is 25° to 35°.

3. The guide vane casting system for hydropower equipment according to claim 1, characterized in that: The guide vane model forms an inclination of 1:12 with the horizontal plane.

4. A method for casting guide vanes of hydropower equipment, characterized in that: The following steps are involved: Produce a hydropower equipment guide vane casting system as described in any one of claims 1 to 3, The heated molten iron is poured into the guide vane casting system of the hydropower equipment, and the molten iron is taken out after solidification to obtain the guide vane.

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