Centrifugal pump impeller casting system and casting method thereof

Abstract

The centrifugal pump impeller casting system comprises a pouring mold mechanism, a cooling water tank, a mounting support and an impeller conveying mechanism, and the pouring mold mechanism is fixed over the impeller conveying mechanism through the mounting support; the pouring mold mechanism comprises an upper mold and lower molds, the number of the lower molds is two, lower mold cavities are formed in the top ends of the lower molds, two upper mold cavities are formed in the bottom end of the upper mold, and the two upper mold cavities are correspondingly matched with the lower mold cavities in the top ends of the two lower molds respectively. The whole process from opening and closing of the mold, demolding of the impeller to cooling and conveying is highly automatic, manual intervention is reduced, and the labor cost and the risk of manual operation errors are reduced. The impeller conveying mechanism is in close fit with other parts, and the demolded impeller can be quickly received and fed into the cooling water tank, so that seamless connection from casting to cooling is realized, and the continuity and efficiency of the production process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pump impeller casting, and in particular to a centrifugal pump impeller casting system and a casting method thereof. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. Its impeller has a complex shape and is usually made by casting. During casting, it is necessary to first prepare a sand mold with a cavity, and then pour molten metal into the cavity. After the molten metal cools and hardens, the impeller is made. In the field of centrifugal pump impeller casting, traditional technology faces many challenges.

[0003] In terms of automation, the traditional system lacks a complete automation process. From the opening and closing of the mold, the demoulding of the impeller to the subsequent transportation and cooling, each link requires a lot of manual participation. This not only consumes a lot of manpower, but also easily leads to operational errors due to human factors, which in turn affects the stability of product quality and the improvement of production efficiency.

[0004] There are also problems in the cooling process. Some traditional casting systems lack precise control over the impeller cooling process, and it is difficult to guarantee the impeller's residence time in the coolant. If the residence time is too short, the impeller is not fully cooled, its internal structure cannot be effectively optimized, and its mechanical properties are greatly reduced, which directly affects the service life and working efficiency of the centrifugal pump impeller.

[0005] In view of the above-mentioned defects of the traditional centrifugal pump impeller casting technology, it is imperative to develop a new casting system that is efficient, precise, highly automated and can ensure product quality. The present invention was born to solve these problems. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a centrifugal pump impeller casting system and a casting method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A centrifugal pump impeller casting system comprises a casting mold mechanism, a cooling water tank, a mounting bracket and an impeller conveying mechanism, wherein the casting mold mechanism is fixed directly above the impeller conveying mechanism through the mounting bracket; The casting mold mechanism includes an upper mold and a lower mold, wherein the lower mold is provided with two, a lower mold cavity is provided at the top of the lower mold, and two upper mold cavities are provided at the bottom of the upper mold, and the two upper mold cavities are respectively matched with the lower mold cavities at the top of the two lower molds, and the upper mold is fixed on the mounting bracket, and a driving mechanism is provided on the mounting bracket, and the driving mechanism is used to drive the two lower molds to rise and fall synchronously and drive the two lower molds to rotate and tilt; The impeller conveying mechanism is used to catch the impeller that tilts down from the lower mold and slowly convey it toward the two ends of the cooling water trough to the groove positions at the two ends of the cooling water trough.

[0008] Preferably, a collector is provided in the groove, a lifting rod is provided at the top end of the collector, and the top end of the lifting rod extends to the outside of the cooling water tank.

[0009] Preferably, the impeller conveying mechanism includes multiple receiving plates, the receiving plate located in the middle position has the highest height, and the heights of the receiving plates arranged towards the grooves on both sides decrease successively, the receiving plates are supported and fixed by support rods, and a drop opening is provided on the support rods, the top of the receiving plates is provided with a boss inclined surface, and the top of the receiving plates is provided with a rotating dial plate.

[0010] Preferably, the support rod is hollow inside, and a vertical rotating shaft is rotatably installed inside the support rod, the top end of the vertical rotating shaft is fixed to the rotating dial plate, and the bottom end of the vertical rotating shaft is fixed to the output shaft of the rotating motor.

[0011] Preferably, the upper mold and the lower mold are both provided with a coolant inlet and outlet, the top of the upper mold is provided with a pouring port, the bottom of the upper mold is provided with a guide column, and the top of the lower mold is provided with a guide groove corresponding to the guide column.

[0012] Preferably, the driving mechanism includes four synchronous wheels rotatably mounted on a mounting bracket, the four synchronous wheels are arranged in pairs, and a synchronous belt is installed on the outside of each pair of synchronous wheels, the sides of the two lower molds that are away from each other are fixed to the surface of the synchronous belt, and a driving box is fixed on the mounting bracket, and the driving box is used to drive the two synchronous wheels located below to rotate synchronously in opposite directions.

[0013] Preferably, a horizontal rotating shaft is rotatably installed inside the driving box, a spiral guide groove is provided on the outside of the horizontal rotating shaft, first bevel gears are fixed at both ends of the horizontal rotating shaft, second bevel gears are fixed on the mounting rotating shafts of the two synchronous wheels located below, the second bevel gears are meshed with the first bevel gears, a push rod motor is also fixed in the driving box, a horizontal moving bracket is fixed at the output end of the push rod motor, a limit rod is fixed on the horizontal moving bracket, and one end of the limit rod extends into the spiral guide groove.

[0014] Preferably, a top column is movably installed in the lower mold, the top end of the top column is flush with the bottom inner wall of the lower mold cavity, and the bottom end of the top column extends to the bottom of the lower mold and is fixed with a top plate.

[0015] Preferably, a return spring is sleeved on the outside of the top column between the top plate and the lower mold, and a trigger member is fixed to the bottom end of the mounting bracket.

[0016] A centrifugal pump impeller casting method comprises the following steps: S1: high-temperature liquid casting material is injected into the mold cavity consisting of the upper mold cavity and the lower mold cavity through the pouring port at the top of the upper mold, and the pouring molding process begins; S2: During the pouring process, the coolant circulates through the coolant inlet and outlet on the upper mold and the lower mold to cool the mold and accelerate the solidification of the liquid material; S3: After the impeller is formed in the cavity, the driving mechanism drives the two lower molds to move downward synchronously, so that the lower mold is separated from the upper mold, and the formed impeller remains in the lower mold cavity; S4: The driving mechanism continues to drive the lower mold to flip to a tilted state, the trigger member contacts the top plate, the ejector column ejects the formed impeller from the lower mold cavity, and the impeller falls into the receiving plate of the impeller conveying mechanism; S5: The impeller conveying mechanism conveys the impeller slowly to the grooves at both ends of the cooling water tank through the relay conveying of the multi-stage receiving plate, and the impeller is fully cooled in the cooling water tank; S6: After cooling is completed, the operator lifts the collector out of the groove using the lifting rod and carries out subsequent processing and transportation of the impeller.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the exquisite coordination of the push rod motor, synchronous wheel, synchronous belt, gear transmission, guide column and guide groove, the precise lifting and flipping of the lower mold is realized, ensuring the high precision of mold opening and closing, greatly reducing the casting defects caused by mold misalignment, ensuring the dimensional accuracy and surface quality of the impeller, and improving the product yield. At the same time, the coolant inlet and outlet design of the upper and lower molds allows the coolant to circulate during the pouring process, accelerates the solidification of the liquid material, optimizes the internal organizational structure of the casting, and enhances the mechanical properties of the impeller.

[0018] 2. From the opening and closing of the mold, the demoulding of the impeller to the cooling and transportation, the whole process is highly automated, reducing manual intervention, labor costs and the risk of human operation errors. The impeller conveying mechanism works closely with other parts, and the impeller after demoulding can be quickly received and sent to the cooling water tank, realizing a seamless connection from casting to cooling, and improving the continuity and efficiency of the production process.

[0019] 3. The special design of the impeller conveying mechanism, such as the stepped layout of the multiple receiving plates, the coordinated operation of the boss slope, the rotating dial plate and the drop port, enables the impeller to be slowly and steadily conveyed to the grooves at both ends in the cooling water tank, ensuring that the impeller stays in the coolant for a long enough time, meeting the strict requirements of the cooling time for impellers of different materials, ensuring sufficient cooling of the impeller, avoiding quality problems caused by insufficient cooling, and improving the stability of product quality.

[0020] 4. The collectors in the grooves at both ends of the cooling water tank, combined with the lifting rod at the top, make it easy for operators to lift out the collectors after a certain number of impellers have been collected, which facilitates the subsequent centralized processing and transportation of the impellers and optimizes the final link of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A perspective view of the present invention; Figure 2 It is a three-dimensional cross-sectional view of the cooling water tank of the present invention; Figure 3 It is a cross-sectional view of the cooling water tank of the present invention from the main perspective; Figure 4 A top view of the impeller conveying mechanism of the present invention; Figure 5 It is a three-dimensional diagram of the impeller conveying mechanism of the present invention; Figure 6 It is a stereoscopic view of the casting mold mechanism of the present invention from a side elevation perspective; Figure 7 It is a three-dimensional diagram of the casting mold mechanism of the present invention from a side-down perspective; Figure 8 It is a front view of the casting mold mechanism of the present invention; Fig. 9 It is a schematic diagram of the two lower molds flip separation device of the present invention; Fig.10 for Fig. 9 A zoomed-in detail of position A in the middle; Fig.11 It is a cross-sectional view of the drive box of the present invention; Fig.12 It is a detailed view of the internal parts of the drive box of the present invention; Fig.13 It is a schematic diagram of the lower mold structure of the present invention; In the figure: 1. casting mold mechanism; 101. upper mold; 1011. pouring port; 1012. guide column; 1013. upper mold cavity; 102. lower mold; 1021. lower mold cavity; 1022. top column; 1023. top plate; 1024. return spring; 1025. trigger; 2. cooling water tank; 201. groove; 202. collector; 2021. lifting rod; 3. mounting bracket; 301. synchronous wheel; 302. synchronous Belt; 303, second bevel gear; 4, impeller conveying mechanism; 401, support rod; 402, receiving plate; 403, drop port; 404, vertical shaft; 405, rotating dial plate; 406, rotating motor; 5, coolant inlet and outlet; 6, drive box; 601, horizontal shaft; 602, spiral guide groove; 603, first bevel gear; 604, push rod motor; 605, horizontal movable bracket; 6051, limit rod; 7, impeller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0024] Reference Figure 1-13 A centrifugal pump impeller casting system includes a casting mold mechanism 1, a cooling water tank 2, a mounting bracket 3 and an impeller conveying mechanism 4. The various parts cooperate closely to jointly complete the casting and conveying process of the impeller. The casting mold mechanism 1 is fixed directly above the impeller conveying mechanism 4 through the mounting bracket 3, ensuring that the impeller can accurately fall into the impeller conveying mechanism 4 after being demoulded from the mold, achieving efficient connection, and greatly improving the consistency and fluency of the overall production process; The casting mold mechanism 1 includes an upper mold 101 and a lower mold 102. The lower mold 102 is provided with two. A lower mold cavity 1021 is provided at the top of the lower mold 102. Two upper mold cavities 1013 are provided at the bottom of the upper mold 101. The two upper mold cavities 1013 correspond to and match the lower mold cavities 1021 at the tops of the two lower molds 102 respectively. The upper mold 101 is fixed on the mounting bracket 3. The mounting bracket 3 is provided with a driving mechanism. The driving mechanism is used to drive the two lower molds 102 to rise and fall synchronously and drive the two lower molds 102 to rotate and tilt. During the mold closing process, the lower mold 102 rises steadily along a preset trajectory. The guide groove at the top of the lower mold 102 is precisely matched with the guide column 1012 at the bottom of the upper mold 101, ensuring that the upper and lower molds are accurately docked to form a closed and precise cavity, providing space for the injection of high-temperature liquid casting materials. When it is necessary to remove the formed impeller from the mold, the lower mold 102 is gradually tilted under the action of the driving mechanism, creating favorable conditions for the smooth demoulding of the impeller. The impeller conveying mechanism 4 is used to catch the impeller 7 that has tilted down from the lower mold 102 and slowly convey it toward the two ends of the cooling water trough 2, and convey it to the groove 201 positions at both ends of the cooling water trough 2. The impeller 7 is slowly transferred in the cooling water trough 2, and has sufficient time to cool down, ensuring that the cooling is completed when it moves to the groove 201 position. Since the impeller 7 is transported to the groove 201 position in a concentrated manner, it is convenient to take out the impeller 7.

[0025] The collector 202 is provided in the groove 201, and a lifting rod 2021 is provided at the top of the collector 202. The top of the lifting rod 2021 extends to the outside of the cooling water tank 2. When the impeller 7 is finally transported to the groove 201, it will fall into the collector 202 pre-placed in the groove 201. The collector 202 is used to collect the cast impellers 7 in a centralized manner. When a certain number of impellers 7 are collected in the collector 202, the operator can lift the collector 202 out of the groove 201 through the lifting rod 2021, which is convenient for subsequent processing and transportation of the impeller 7. Example 2

[0026] Reference Figure 1-13 , the difference between this embodiment and embodiment 1 is that the impeller conveying mechanism 4 includes a plurality of receiving plates 402, the receiving plate 402 located in the middle position has the highest height, and the receiving plates 402 arranged toward the grooves 201 on both sides are successively lower in height, the receiving plates 402 are supported and fixed by support rods 401, and the support rods 401 are provided with a drop opening 403, the top of the receiving plate 402 is provided with a boss inclined surface, and the top of the receiving plate 402 is provided with a rotating dial plate 405, the support rod 401 is hollow inside, and a vertical rotating shaft 404 is rotatably installed inside the support rod 401, the top of the vertical rotating shaft 404 is fixed to the rotating dial plate 405, and the bottom of the vertical rotating shaft 404 is fixed to the output shaft of the rotating motor 406; The impeller 7 separated from the mold will fall vertically into the receiving tray 402 in the middle of the impeller conveying mechanism 4. Since the top of the receiving tray 402 is provided with a boss slope, the impeller 7 will gradually slide down along the boss slope to the edge of the receiving tray 402 under the action of gravity. At this time, the rotating motor 406 is in working state, and its output shaft drives the vertical rotating shaft 404 to rotate, and the rotating dial plate 405 fixed to the top of the vertical rotating shaft 404 also rotates accordingly. During the rotation process, the rotating dial plate 405 will gradually contact and push the impeller 7 located at the edge of the receiving tray 402, so that it moves toward the drop port 403. When the impeller 7 moves to the position of the lower drop port 403, due to the existence of the lower drop port 403, the impeller 7 will fall onto the next-level receiving plate 402. The structure and working principle of the next-level receiving plate 402 are the same as those of the previous level. The impeller 7 on this level of receiving plate 402 will also slide to the edge under the action of the boss slope, and then be gradually moved by the rotating plate 405 and fall into the next-level receiving plate 402. In this way, the impeller 7 is repeatedly conveyed by the relay of each level of receiving plate 402, and is slowly and gradually conveyed to the groove 201 position at both ends of the cooling water tank 2.

[0027] Among them, the upper mold 101 and the lower mold 102 are both provided with a coolant inlet and outlet 5, the top of the upper mold 101 is provided with a pouring port 1011, the bottom of the upper mold 101 is provided with a guide column 1012, and the top of the lower mold 102 is provided with a guide groove corresponding to the guide column 1012. During the pouring process, the coolant circulates through the coolant inlet and outlet 5 on the upper mold 101 and the lower mold 102 to cool the mold and accelerate the solidification of the liquid material. The guide groove at the top of the lower mold 102 is precisely matched with the guide column 1012 at the bottom of the upper mold 101, ensuring that the upper and lower molds are accurately docked to form a closed and precise cavity. Example 3

[0028] Reference Figure 1-13The difference between this embodiment and the embodiment 1 is that the driving mechanism includes four synchronous wheels 301 rotatably mounted on the mounting bracket 3, the four synchronous wheels 301 are arranged in pairs, and a synchronous belt 302 is installed on the outside of each pair of synchronous wheels 301, and the sides of the two lower molds 102 that are away from each other are fixed to the surface of the synchronous belt 302, and a driving box 6 is fixed on the mounting bracket 3. The driving box 6 is used to drive the two synchronous wheels 301 located below to rotate synchronously in the opposite direction, and a horizontal shaft 601 is rotatably installed inside the driving box 6. The horizontal shaft 601 A spiral guide groove 602 is provided on the outside of 01, first bevel gears 603 are fixed at both ends of the horizontal rotating shaft 601, second bevel gears 303 are fixed on the mounting rotating shafts of the two synchronous wheels 301 located below, and the second bevel gears 303 are meshed with the first bevel gears 603. A push rod motor 604 is also fixed in the driving box 6, and a horizontal moving bracket 605 is fixed at the output end of the push rod motor 604. A limit rod 6051 is fixed on the horizontal moving bracket 605, and one end of the limit rod 6051 extends into the spiral guide groove 602; In the initial state, the horizontal movable bracket 605 is located at the starting position in the driving box 6, and the limit rod 6051 contacts the starting end of the spiral guide groove 602. As the push rod motor 604 is powered on, its output shaft extends, pushing the horizontal movable bracket 605 to move smoothly in the horizontal direction. In this process, the limit rod 6051 slides in the spiral guide groove 602. Due to the special spiral shape of the spiral guide groove 602, it will exert a tangential force on the limit rod 6051, and this tangential force will drive the horizontal shaft 601 to start rotating. The first bevel gears 603 at both ends of the horizontal shaft 601 rotate synchronously with the horizontal shaft 601, and the second bevel gears 303 on the mounting shafts of the two synchronous wheels 301 below are in meshing state with the first bevel gear 603. Therefore, when the first bevel gear 603 rotates, the two synchronous wheels 301 below will be driven to rotate synchronously in the opposite direction through the meshing transmission between the gears; Since the two lower molds 102 are respectively fixed on the side of the synchronous belt 302 close to each other, when the synchronous wheel 301 rotates, the synchronous belt 302 begins to move in a circular rotation outside the two pairs of synchronous wheels 301. In this process, the lower mold 102 begins to move up and down synchronously with the movement of the synchronous belt 302. When the lower mold 102 moves upward, the guide groove at the top of the lower mold 102 will gradually rise along the guide column 1012 at the bottom of the upper mold 101 until the lower mold 102 is tightly combined with the upper mold 101. At this time, the upper mold cavity 1013 and the lower mold cavity 1021 are connected to each other to form a complete mold cavity, and the high-temperature liquid casting material is injected into the mold cavity through the pouring port 1011 at the top of the upper mold 101 to start the pouring molding process.

[0029] During the pouring process, the coolant circulates through the coolant inlet and outlet 5 on the upper mold 101 and the lower mold 102 to cool the mold and accelerate the solidification of the liquid material. After a period of cooling, the impeller 7 is formed in the cavity. At this time, the push rod motor 604 reverses, and its output shaft contracts, driving the horizontal moving bracket 605 to move horizontally in the opposite direction. This action causes the horizontal rotating shaft 601 to rotate in the opposite direction, and then through gear transmission, the two synchronous wheels 301 below rotate in the opposite direction synchronously, driving the synchronous belt 302 to move in the opposite direction, and finally realizing the synchronous downward movement of the two lower molds 102. When the lower mold 102 moves downward to a certain distance, the lower mold 102 is completely separated from the upper mold 101, and the molded impeller 7 remains in the lower mold cavity 1021; As the lower die 102 continues to move downward along the synchronous belt 302, the lower die 102 moves along the edge of the synchronous wheel 301. Due to the circular shape of the synchronous wheel 301, the lower die 102 gradually turns over during the movement.

[0030] Among them, a top column 1022 is movably installed in the lower mold 102, the top of the top column 1022 is flush with the inner wall of the bottom end of the lower mold cavity 1021, the bottom end of the top column 1022 extends to the bottom of the lower mold 102 and is fixed with a top plate 1023, the outside of the top column 1022 is located between the top plate 1023 and the lower mold 102 and is sleeved with a return spring 1024, and the bottom end of the mounting bracket 3 is fixed with a trigger member 1025; When flipped to the tilted state, the top plate 1023 under the lower mold 102 will contact the trigger member 1025 fixed at the bottom end of the mounting bracket 3. As the lower mold 102 continues to flip, the trigger member 1025 will exert an upward force on the top plate 1023, causing the top plate 1023 to move upward, thereby compressing the return spring 1024. While the return spring 1024 is compressed, the top column 1022 fixedly connected to the top plate 1023 also moves upward, and the top end of the top column 1022 gradually protrudes from the bottom end of the lower mold cavity 1021. When the top column 1022 protrudes to a certain extent, it will eject the formed impeller 7 from the lower mold cavity 1021. Example 4

[0031] A centrifugal pump impeller casting method comprises the following steps: S1: injecting high-temperature liquid casting material into the mold cavity composed of the upper mold cavity 1013 and the lower mold cavity 1021 through the pouring port 1011 at the top of the upper mold 101, and starting the pouring molding process; S2: During the pouring process, the coolant circulates through the coolant inlet and outlet 5 on the upper mold 101 and the lower mold 102 to cool the mold and accelerate the solidification of the liquid material; S3: After the impeller 7 is formed in the cavity, the driving mechanism drives the two lower molds 102 to move downward synchronously, so that the lower mold 102 is separated from the upper mold 101, and the formed impeller 7 remains in the lower mold cavity 1021; S4: the driving mechanism continues to drive the lower mold 102 to flip to a tilted state, the trigger member 1025 contacts the top plate 1023, the top column 1022 ejects the formed impeller 7 from the lower mold cavity 1021, and the impeller 7 falls into the receiving plate 402 of the impeller conveying mechanism 4; S5: The impeller conveying mechanism 4 slowly conveys the impeller 7 to the grooves 201 at both ends of the cooling water tank 2 through the relay conveying of the multi-stage receiving plate 402, and the impeller 7 is fully cooled in the cooling water tank 2; S6: After cooling is completed, the operator lifts the collector 202 out of the groove 201 through the lifting rod 2021 and performs subsequent processing and transportation on the impeller 7.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "set", "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 one; it can be a mechanical connection, 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.

[0034] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A centrifugal pump impeller casting system, comprising a casting mold mechanism (1), a cooling water tank (2), a mounting bracket (3) and an impeller conveying mechanism (4), characterized in that: The casting mold mechanism (1) is fixed directly above the impeller conveying mechanism (4) via a mounting bracket (3); The casting mold mechanism (1) comprises an upper mold (101) and a lower mold (102), wherein two lower molds (102) are provided, a lower mold cavity (1021) is provided at the top of the lower mold (102), and two upper mold cavities (1013) are provided at the bottom of the upper mold (101), wherein the two upper mold cavities (1013) respectively correspond to the lower mold cavities (1021) at the tops of the two lower molds (102), and the upper mold (101) is fixed on a mounting bracket (3), and a driving mechanism is provided on the mounting bracket (3), wherein the driving mechanism is used to drive the two lower molds (102) to rise and fall synchronously and to drive the two lower molds (102) to rotate and tilt; The impeller conveying mechanism (4) is used to catch the impeller (7) that has tilted down from the lower mold (102) and slowly convey it toward the two ends of the cooling water trough (2), and convey it to the positions of the grooves (201) at the two ends of the cooling water trough (2).

2. A centrifugal pump impeller casting system according to claim 1, characterized in that: A collector (202) is provided in the groove (201), a lifting rod (2021) is provided at the top end of the collector (202), and the top end of the lifting rod (2021) extends to the outside of the cooling water tank (2).

3. A centrifugal pump impeller casting system according to claim 1, characterized in that: The impeller conveying mechanism (4) comprises a plurality of receiving plates (402), wherein the receiving plate (402) located in the middle is the highest, and the receiving plates (402) arranged towards the grooves (201) on both sides have decreasing heights in sequence, the receiving plates (402) are supported and fixed by support rods (401), and a drop opening (403) is provided on the support rods (401), a boss inclined surface is provided at the top end of the receiving plates (402), and a rotating dial plate (405) is provided at the top end of the receiving plates (402).

4. A centrifugal pump impeller casting system according to claim 3, characterized in that: The support rod (401) is hollow inside, and a vertical rotating shaft (404) is rotatably mounted inside the support rod (401). The top end of the vertical rotating shaft (404) is fixed to the rotating dial plate (405), and the bottom end of the vertical rotating shaft (404) is fixed to the output shaft of the rotating motor (406).

5. A centrifugal pump impeller casting system according to claim 1, characterized in that: The upper mold (101) and the lower mold (102) are both provided with a cooling liquid inlet and outlet (5), the top end of the upper mold (101) is provided with a pouring port (1011), the bottom end of the upper mold (101) is provided with a guide column (1012), and the top end of the lower mold (102) is provided with a guide groove corresponding to the guide column (1012).

6. A centrifugal pump impeller casting system according to claim 1, characterized in that: The driving mechanism comprises four synchronous wheels (301) rotatably mounted on a mounting bracket (3), the four synchronous wheels (301) being arranged in pairs, and a synchronous belt (302) being mounted on the outside of each pair of synchronous wheels (301), the sides of the two lower moulds (102) being away from each other being fixed to the surface of the synchronous belt (302), and a driving box (6) being fixed on the mounting bracket (3), the driving box (6) being used for driving the two synchronous wheels (301) located below to rotate synchronously in opposite directions.

7. A centrifugal pump impeller casting system according to claim 6, characterized in that: A horizontal rotating shaft (601) is rotatably mounted inside the driving box (6), a spiral guide groove (602) is arranged outside the horizontal rotating shaft (601), first bevel gears (603) are fixed to both ends of the horizontal rotating shaft (601), second bevel gears (303) are fixed to the mounting rotating shafts of the two synchronous wheels (301) located below, and the second bevel gears (303) are meshed with the first bevel gears (603), a push rod motor (604) is also fixed inside the driving box (6), a horizontal moving bracket (605) is fixed to the output end of the push rod motor (604), a limit rod (6051) is fixed to the horizontal moving bracket (605), and one end of the limit rod (6051) extends into the spiral guide groove (602).

8. A centrifugal pump impeller casting system according to claim 7, characterized in that: A top column (1022) is movably installed in the lower mold (102), the top end of the top column (1022 is flush with the bottom inner wall of the lower mold cavity (1021), and the bottom end of the top column (1022) extends to the bottom of the lower mold (102) and is fixed with a top plate (1023).

9. A centrifugal pump impeller casting system according to claim 8, characterized in that: A return spring (1024) is sleeved on the outside of the top column (1022) and located between the top plate (1023) and the lower mold (102), and a trigger member (1025) is fixed to the bottom end of the mounting bracket (3).

10. A centrifugal pump impeller casting method, applied to a centrifugal pump impeller casting system as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: injecting a high-temperature liquid casting material into a mold cavity consisting of an upper mold cavity (1013) and a lower mold cavity (1021) through a pouring port (1011) at the top of an upper mold (101), thereby starting a pouring molding process; S2: During the pouring process, the coolant circulates through the coolant inlet and outlet (5) on the upper mold (101) and the lower mold (102) to cool the mold and accelerate the solidification of the liquid material; S3: After the impeller (7) is formed in the mold cavity, the driving mechanism drives the two lower molds (102) to move downward synchronously, so that the lower mold (102) is separated from the upper mold (101), and the formed impeller (7) remains in the lower mold cavity (1021); S4: the driving mechanism continues to drive the lower mold (102) to flip to a tilted state, the trigger member (1025) contacts the top plate (1023), the top column (1022) ejects the formed impeller (7) from the lower mold cavity (1021), and the impeller (7) falls into the receiving plate (402) of the impeller conveying mechanism (4); S5: the impeller conveying mechanism (4) slowly conveys the impeller (7) to the positions of the grooves (201) at both ends of the cooling water trough (2) through the relay conveying of the multi-stage receiving plate (402), and the impeller (7) is fully cooled in the cooling water trough (2); S6: After the cooling is completed, the operator lifts the collector (202) out of the groove (201) through the lifting rod (221) and performs subsequent processing and transportation on the impeller (7).

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