Stirring equipment for prefabricated part pouring

By introducing a flow-dividing device with linkage adjustment into the mixing equipment, the problems of direct impact of the casting material on the punch and uneven casting layer are solved, achieving uniform distribution and surface flatness of the casting layer, and improving production efficiency and molding quality.

CN120962845APending Publication Date: 2025-11-18YUNNAN YUNLU LVYUAN HUIBANG ENG TECH CO LTD
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Patent Information

Application Number
CN202511450634.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-11
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

Traditional mixing equipment suffers from problems such as splashing caused by direct impact of the casting material on the punch during the feeding process, and uneven casting layer thickness, resulting in material waste, environmental pollution and low production efficiency.

Method used

The flow distribution device adopts linkage adjustment. Through the linkage transmission between the arc-shaped valve plate and the V-shaped flow distribution plate, it ensures that the casting material is fed evenly from both ends of the rectangular mold, avoiding direct impact on the punch and achieving a smooth casting layer.

Benefits of technology

It achieves uniform distribution and surface smoothness of the poured layer, reduces material waste and environmental pollution, improves production efficiency, and reduces the need for manual smoothing processes.

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Abstract

The invention belongs to the technical field of building prefabricated part production, and particularly relates to stirring equipment for prefabricated part pouring, the stirring equipment comprises a stirring machine shell, an arc-shaped valve plate, a discharging hopper and a flow dividing device, the bottom end of the stirring machine shell is fixedly connected with the discharging hopper, the flow dividing device is arranged in the discharging hopper, and the bottom end of the stirring machine shell is provided with a discharging port; an arc-shaped valve plate is arranged in the discharging port, the flow dividing device and the arc-shaped valve plate are in connection transmission, the driving mechanism is used for driving the arc-shaped valve plate, the flow dividing device adjusts the flow dividing position in real time along with the opening degree of the arc-shaped valve plate, and the flow dividing device comprises a V-shaped flow dividing plate rotationally arranged with the discharging hopper. According to the invention, the pouring material is prevented from directly impacting the male die to generate splashing and is uniformly shunted from the two ends of the die, and the V-shaped shunting plate which is adjusted in a linkage manner adapts to the opening change of the arc-shaped valve plate, so that the uniform distribution of the pouring material can be ensured, and accurate shunting and surface flatness requirements can be ensured to be realized under different openings.
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Description

Technical Field

[0001] This invention belongs to the field of precast building component production technology, and in particular relates to a mixing device for casting precast components. Background Technology

[0002] Composite structural plates used in the construction of smelting furnaces are typically made of refractory materials, and these plates are an important component of the furnace body structure. In the production of these composite structural plates, mixing equipment is used to distribute the prepared refractory castable into precast molds, and through processes such as layered casting and vibration, plate products with designed strength and refractory properties are formed.

[0003] When selecting a feeding system for mixing equipment used in casting perforated composite structural panels, a single hopper for direct feeding is typically employed. However, for panels with a punch in the center of a rectangular mold to form holes, the traditional single hopper feeding method has significant drawbacks: when the refractory castable falls directly from the center of the hopper, it directly impacts the top of the punch, causing splashing. This not only wastes material but also contaminates the area around the mold, affecting the working environment and the appearance quality of the panel.

[0004] Traditional mixing equipment uses arc-shaped baffle valves to control the material flow rate. These valves are typically driven from one side, opening gradually from one side. Due to the structural characteristics of the arc-shaped baffle valve, a larger flow rate occurs on the side that opens first during the opening process. Refractory castable will preferentially flow out in large quantities from the area that opens first. This uneven material distribution method leads to uneven layer thickness and an uneven surface in layered casting processes, requiring additional manual smoothing. This not only increases labor costs but also prolongs the production cycle and reduces production efficiency.

[0005] Therefore, there is an urgent need in the existing technology for an improved feeding system that can avoid splashing caused by direct impact of the casting material on the punch, while ensuring uniform feeding from both ends of the rectangular mold and ensuring a flat casting layer, so as to improve the production efficiency and molding quality of perforated composite structural plates. Summary of the Invention

[0006] To address the technical problems existing in the background art, the present invention provides a mixing device for casting precast components. By designing a flow-dividing device with linkage adjustment, it avoids the casting material from directly impacting the punch and causing splashing, while ensuring that the surface of the casting layer is flat and avoids manual smoothing.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows: A mixing device for casting precast components includes a mixer housing, an arc-shaped valve plate, a hopper, and a diversion device; A hopper is fixedly connected to the bottom of the mixer shell. A diversion device is set inside the hopper. A discharge port is opened at the bottom of the mixer shell. An arc-shaped valve plate is installed inside the discharge port. The top of the arc-shaped valve plate is connected to the support mechanism through a rotating shaft. The top of the arc-shaped valve plate is connected to the drive mechanism through a connecting shaft. The diversion device is connected to the arc-shaped valve plate for transmission. The diversion device includes a V-shaped diversion plate that is rotatably set with the hopper. The drive mechanism is used to drive the arc-shaped valve plate so that the diversion device can adjust the diversion position in real time according to the opening of the arc-shaped valve plate, so that the casting material can be divided into two streams and flow evenly to both ends of the mold through the V-shaped diversion plate at any opening of the arc-shaped valve plate.

[0008] Optionally, the diversion device also includes a first support shaft fixedly connected to the inner wall of the hopper, a first sleeve and a second sleeve fixedly connected to the bottom edges of the two sides of the V-shaped diversion plate respectively, the first sleeve being rotatably connected to the first support shaft, a fixed plate fixedly connected to the top of the V-shaped diversion plate, a rectangular hole being opened at the top of the fixed plate, an arc-shaped guide plate being fixedly connected to the inner wall of the rectangular hole, a guide block being slidably connected to the inner wall of the arc-shaped guide plate, and a diversion rod being slidably connected inside the guide block.

[0009] Optionally, a limit ring is fixedly connected to the outer wall of the diverter rod, and a preload spring is provided on the outer wall of the diverter rod. The top end of the preload spring abuts against the limit ring, and the bottom end of the preload spring abuts against the guide block.

[0010] Optionally, a drive rack is fixedly connected to the top of the diverter rod, and a guide rail is slidably connected to the outer end of the drive rack. The guide rail is fixedly connected to the bottom end of the mixer housing via a bracket. A drive gear meshes with the outer end of the drive rack, and the top of the drive gear is fixedly connected to the bottom end of the arc-shaped valve plate via a mounting shaft. The drive gear and the rotating shaft are concentrically arranged.

[0011] Optionally, the support mechanism includes a first bearing and a second bearing that are rotatably connected to the rotating shaft. A first support plate is fixedly connected to the top of the first bearing, and a second support plate is fixedly connected to the bottom of the second bearing. Both the first support plate and the second support plate are fixedly connected to the outer wall of the mixer housing.

[0012] Optionally, the drive mechanism includes a drive block rotatably connected to the adapter shaft, a drive cylinder fixedly connected to the outer end of the drive block, and a mounting seat hinged to the bottom end of the drive cylinder via a pin. The mounting seat is fixedly connected to the outer wall of the mixer housing.

[0013] Optionally, the hopper is provided with an arc-shaped hole, the inner wall of the second sleeve is rotatably connected to a second support shaft, the bottom end of the second support shaft is fixedly connected to an arc-shaped plate, the bottom end of the hopper is fixedly connected to an arc-shaped guide rail, and the arc-shaped plate and the arc-shaped guide rail are slidably connected.

[0014] Optionally, the curvature of the arc-shaped guide rail is matched with the motion trajectory of the second sleeve when the V-shaped distributor plate rotates around the first support axis.

[0015] The present invention has the following advantages and beneficial effects: In this invention, a linkage transmission mechanism between the diversion device and the arc-shaped valve plate is established. When the arc-shaped valve plate rotates, the drive gear synchronously drives the drive rack to move, thereby synchronously adjusting the position and angle of the V-shaped diversion plate within the hopper. The drive mechanism drives the arc-shaped valve plate to open or close, thus synchronously adjusting the diversion position of the V-shaped diversion plate. With this structure, regardless of the opening degree, the V-shaped diversion plate can precisely correspond to the opening state of the arc-shaped valve plate, uniformly feeding the castable material from both ends of the rectangular mold. This achieves directional diversion, ensuring uniform casting layer thickness and a smooth surface, eliminating the need for manual smoothing.

[0016] The mixing equipment needs to be debugged to ensure the accuracy and effectiveness of the casting and distribution of composite structural panels. During the installation and debugging phase, the correspondence between the opening of the arc-shaped valve plate and the distribution angle of the V-shaped flow divider plate can be adjusted simultaneously to ensure uniform feeding from both ends of the mold at any opening. This avoids splashing caused by direct impact of the casting material on the punch, prevents material waste and mold contamination, and significantly reduces manual smoothing processes while ensuring the appearance quality of the panels, shortening the production cycle and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the mixing equipment used for precast component casting in this invention; Figure 2 This is a partial view of the mixing equipment used for precast component casting in this invention. Figure 1 ; Figure 3 This is a partial view of the mixing equipment used for precast component casting in this invention. Figure 2 ; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a structural diagram of the support mechanism and the drive mechanism in this invention; Figure 6 This is a top view of the diversion device in this invention; Figure 7 This is a structural diagram of the V-shaped flow divider in this invention; Figure 8 This is a partial view of the mixing equipment used for precast component casting in this invention. Figure 3 .

[0018] Reference numerals: 1. Mixer housing; 11. Discharge port; 2. Arc-shaped valve plate; 21. Rotating shaft; 22. First bearing; 23. Second bearing; 24. First support plate; 25. Second support plate; 3. Discharge hopper; 31. V-shaped diverter plate; 32. First support shaft; 33. First sleeve; 34. Second sleeve; 35. Fixing plate; 36. Rectangular hole; 37. Guide block; 38. Diverter rod; 39. Limiting ring; 310. Preload spring; 311. Drive rack; 312. Guide rail; 313. Drive gear; 314. Mounting shaft; 315. Arc-shaped guide plate; 4. Bracket; 5. Adapter shaft; 51. Drive block; 52. Drive cylinder; 53. Mounting seat; 6. Arc-shaped hole; 7. Second support shaft; 8. Arc-shaped plate; 9. Arc-shaped guide rail. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] Example like Figures 1-8 As shown, a mixing device for casting precast components includes a mixer housing 1, an arc-shaped valve plate 2, a hopper 3, and a diversion device. The bottom end of the mixer housing 1 is fixedly connected to the hopper 3, and the diversion device is disposed inside the hopper 3. The bottom end of the mixer housing 1 is provided with a discharge port 11, and the discharge port 11 is provided with an arc-shaped valve plate 2. The top end of the arc-shaped valve plate 2 is connected to a support mechanism through a rotating shaft 21, and the top end of the arc-shaped valve plate 2 is connected to a drive mechanism through a connecting shaft 5.

[0022] The flow divider and the arc-shaped valve plate 2 are connected and driven. The flow divider includes a V-shaped flow divider plate 31 that is rotatably mounted with the hopper 3. The drive mechanism drives the arc-shaped valve plate 2, so that the flow divider adjusts the flow position in real time according to the opening of the arc-shaped valve plate 2. This allows the castable material to be divided into two streams and flow evenly to both ends of the mold through the V-shaped flow divider plate 31 at any opening of the arc-shaped valve plate 2. The V-shaped flow divider plate 31 divides a single discharge port into two discharge channels, preventing the castable material from directly impacting the punch at the center of the mold.

[0023] The arc-shaped valve plate 2 can be opened and closed by the action of the drive mechanism. When the arc-shaped valve plate 2 is open, the casting material flows into the hopper 3 from the discharge port 11. The V-shaped diverter plate 31 is adjusted synchronously under the action of the arc-shaped valve plate 2, dividing the casting material into two streams that flow evenly to both ends of the mold. This design can make the casting material flow evenly from both ends of the mold in real time, ensuring that the casting material is evenly distributed in the mold and the surface is smoother, thereby improving the molding quality and production efficiency of the precast components.

[0024] like Figures 3-4 and Figure 6 As shown, the diversion device further includes a first support shaft 32 fixedly connected to the inner wall of the hopper 3. A first sleeve 33 and a second sleeve 34 are fixedly connected to the bottom edges of the two sides of the V-shaped diversion plate 31, respectively. The first sleeve 33 is rotatably connected to the first support shaft 32. A fixing plate 35 is fixedly connected to the top of the V-shaped diversion plate 31. A rectangular hole 36 is opened at the top of the fixing plate 35. An arc-shaped guide plate 315 is fixedly connected to the inner wall of the rectangular hole 36. A guide block 37 is slidably connected to the inner wall of the arc-shaped guide plate 315. A diversion rod 38 is slidably connected inside the guide block 37.

[0025] The connection between the first sleeve 33 and the first support shaft 32 can be a bearing connection or a sliding sleeve connection. The first sleeve 33 is rotatably connected to the first support shaft 32 via a bearing. The first support shaft 32 is fixed on the inner wall of the hopper 3, providing a reliable rotational support point for the V-shaped diverter plate 31. The fixing plate 35 is located at the top of the V-shaped diverter plate 31 and is triangular in shape. A rectangular hole 36 is opened at the center of the triangular fixing plate 35. The guide block 37 is embedded in two semi-circular arc-shaped guide plates 315 and can slide within the two semi-circular arc-shaped guide plates 315. The diverter rod 38 passes through the guide block 37 and can rotate within the guide block 37. When the V-shaped diverter plate 31 rotates and diverts the flow, the arc-shaped guide plate 315 provides guidance for the diverter rod 38.

[0026] Furthermore, a limit ring 39 is fixedly connected to the outer wall of the diverter rod 38, and a preload spring 310 is provided on the outer wall of the diverter rod 38. The top end of the preload spring 310 abuts against the limit ring 39, and the bottom end of the preload spring 310 abuts against the guide block 37. The preload spring 310 provides a continuous downward preload force to the V-shaped diverter plate 31, ensuring the stable positioning of the diverter plate 31 during operation, while compensating for gaps caused by manufacturing errors or wear in the system.

[0027] Furthermore, a drive rack 311 is fixedly connected to the top of the diverter rod 38, and a guide rail 312 is slidably connected to the outer end of the drive rack 311. The guide rail 312 is fixedly connected to the bottom end of the mixer housing 1 through the bracket 4. A drive gear 313 is meshed with the outer end of the drive rack 311. The top end of the drive gear 313 is fixedly connected to the bottom end of the arc-shaped valve plate 2 through the mounting shaft 314. The drive gear 313 is concentrically arranged with the rotating shaft 21. This design utilizes the action of the drive mechanism to open and close the arc-shaped valve plate 2. When the arc-shaped valve plate 2 is open, the castable material flows from the discharge port 11 into the discharge hopper 3. At the same time, the arc-shaped valve plate 2 drives the drive gear 313 to rotate. The drive gear 313 meshes with the drive rack 311, causing the drive rack 311 to slide along the guide rail 312, thereby driving the flow divider 38 to move. The flow divider 38 pushes the V-shaped flow divider 31 to rotate around the first support shaft 32, allowing the V-shaped flow divider 31 to adjust the flow divider angle in real time according to the change in the opening of the arc-shaped valve plate 2. This achieves precise positioning and flow divider of the V-shaped flow divider 31. This linkage flow divider design ensures that the castable material can be divided into two streams and flow evenly to both ends of the mold at any opening degree, avoiding the uneven flow phenomenon caused by traditional single-sided opening.

[0028] like Figure 1 and Figure 5 As shown, the support mechanism further includes a first bearing 22 and a second bearing 23 rotatably connected to the rotating shaft 21. A first support plate 24 is fixedly connected to the top of the first bearing 22, and a second support plate 25 is fixedly connected to the bottom of the second bearing 23. Both the first support plate 24 and the second support plate 25 are fixedly connected to the outer wall of the mixer housing 1. The rotating shaft 21 passes through the two bearings and can rotate freely. The two support plates are firmly connected to the outer wall of the mixer housing 1 by welding, forming a stable support frame that provides reliable radial support for the rotating shaft 21 and can also withstand the axial load generated by the arc-shaped valve plate 2 during opening and closing, ensuring the smoothness and accuracy of the valve plate's operation.

[0029] Furthermore, the drive mechanism includes a drive block 51 rotatably connected to the adapter shaft 5. A drive cylinder 52 is fixedly connected to the outer end of the drive block 51. A mounting base 53 is hinged to the bottom end of the drive cylinder 52 via a pin. The mounting base 53 is fixedly connected to the outer wall of the mixer housing 1. The connection between the drive block 51 and the adapter shaft 5 can be a rigid connection or a flexible connection.

[0030] In this embodiment, the drive block 51 is rotatably connected to the adapter shaft 5, and the adapter shaft 5 is fixedly connected to the top end of the arc-shaped valve plate 2, forming a reliable transmission chain. The drive cylinder 52 is hinged to the mounting base 53 via a pin. This hinge design allows the drive cylinder 52 to adjust its angle during the rotation of the arc-shaped valve plate 2, avoiding jamming during transmission.

[0031] like Figure 3 and Figure 7As shown, further, in order to improve the support stability and motion accuracy of the V-shaped diverter plate 31, an arc-shaped hole 6 is provided on the hopper 3, a second support shaft 7 is rotatably connected to the inner wall of the second sleeve 34, an arc-shaped plate 8 is fixedly connected to the bottom end of the second support shaft 7, an arc-shaped guide rail 9 is fixedly connected to the bottom end of the hopper 3, and the arc-shaped plate 8 and the arc-shaped guide rail 9 are slidably connected.

[0032] The curvature of the arc-shaped guide rail 9 matches the motion trajectory of the second sleeve 34 when the V-shaped diverter plate 31 rotates around the first support shaft 32. That is, in the top view, the center of the arc-shaped guide rail 9 coincides with the first support shaft 32, and the radius is equal to the distance from the first support shaft 32 to the center of the second sleeve 34. This allows the second support shaft 7 to slide smoothly along the arc-shaped guide rail 9 during the rotation of the V-shaped diverter plate 31, avoiding motion interference.

[0033] This dual-support design not only improves the support rigidity of the V-shaped diversion plate 31, but also ensures the accuracy of the movement trajectory of the diversion plate 31 through the guiding effect of the arc-shaped guide rail 9. At the same time, during the material feeding process, the arc-shaped plate 8 can seal the arc-shaped hole 6 to prevent material leakage, further improving the accuracy and reliability of diversion adjustment and ensuring the uniform diversion effect of the cast material.

[0034] like Figures 1-8 As shown, when material needs to be discharged, the drive cylinder 52 pushes the drive block 51, which in turn drives the arc-shaped valve plate 2 to rotate around the rotating shaft 21, opening the arc-shaped valve plate 2. At the same time, the arc-shaped valve plate 2 drives the drive gear 313 to rotate, which in turn drives the rack 311 to slide within the guide rail 312. The rack 311 drives the flow divider 38 to move, and the flow divider 38 drives the V-shaped flow divider plate 31 to rotate around the first support shaft 32 via the guide block 37 for flow division adjustment.

[0035] When the arc-shaped valve plate 2 is fully open, the V-shaped diverter plate 31 rotates to the optimal diversion position of the discharge hopper 3, that is, the V-shaped diverter plate 31 rotates to the exact center of the discharge hopper 3, dividing the casting material into two streams that flow evenly to both ends of the mold, effectively avoiding the problem of uneven casting layer, and ensuring casting quality and production efficiency.

[0036] like Figure 2 As shown, the top of the mixer shell 1 is provided with a feed inlet, through which raw materials are fed into the mixer shell 1 for mixing. The mixer shell 1 is provided with mixing blades, which are driven to rotate by a mixing motor. After the various raw materials are mixed evenly, they are discharged through the discharge port 11.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mixing device for casting precast components, characterized in that, It includes a mixer shell (1), an arc-shaped valve plate (2), a hopper (3), and a diversion device; The bottom end of the mixer shell (1) is fixedly connected to a feeding hopper (3), the diversion device is set inside the feeding hopper (3), the bottom end of the mixer shell (1) is provided with a feeding port (11), the feeding port (11) is provided with an arc-shaped valve plate (2), the top end of the arc-shaped valve plate (2) is connected to the support mechanism through a rotating shaft (21), and the top end of the arc-shaped valve plate (2) is connected to the drive mechanism through a connecting shaft (5); The diversion device and the arc-shaped valve plate (2) are connected and driven. The diversion device includes a V-shaped diversion plate (31) that is rotatably set with the hopper (3). The driving mechanism is used to drive the arc-shaped valve plate (2) so that the diversion device can adjust the diversion position in real time according to the opening of the arc-shaped valve plate (2) so that the casting material can be divided into two streams that flow evenly to both ends of the mold through the V-shaped diversion plate (31) at any opening of the arc-shaped valve plate (2).

2. The mixing equipment for precast component casting according to claim 1, characterized in that: The diversion device also includes a first support shaft (32) fixedly connected to the inner wall of the hopper (3), a first sleeve (33) and a second sleeve (34) fixedly connected to the bottom sides of the V-shaped diversion plate (31) respectively, the first sleeve (33) being rotatably connected to the first support shaft (32), a fixing plate (35) fixedly connected to the top of the V-shaped diversion plate (31), a rectangular hole (36) being opened at the top of the fixing plate (35), an arc-shaped guide plate (315) fixedly connected to the inner wall of the rectangular hole (36), a guide block (37) being slidably connected to the inner wall of the arc-shaped guide plate (315), and a diversion rod (38) being slidably connected inside the guide block (37).

3. A mixing device for precast component casting according to claim 2, characterized in that: The outer wall of the diverting rod (38) is fixedly connected to a limiting ring (39), and the outer wall of the diverting rod (38) is provided with a preload spring (310). The top end of the preload spring (310) abuts against the limiting ring (39), and the bottom end of the preload spring (310) abuts against the guide block (37).

4. A mixing device for precast component casting according to claim 3, characterized in that: The top end of the diverter rod (38) is fixedly connected to a drive rack (311), and the outer end of the drive rack (311) is slidably connected to a guide rail (312). The guide rail (312) is fixedly connected to the bottom end of the mixer housing (1) through a bracket (4). The outer end of the drive rack (311) is meshed with a drive gear (313). The top end of the drive gear (313) is fixedly connected to the bottom end of the arc-shaped valve plate (2) through a mounting shaft (314). The drive gear (313) is concentrically arranged with the rotating shaft (21).

5. A mixing device for precast component casting according to claim 1, characterized in that: The support mechanism includes a first bearing (22) and a second bearing (23) rotatably connected to the rotating shaft (21). The top end of the first bearing (22) is fixedly connected to a first support plate (24), and the bottom end of the second bearing (23) is fixedly connected to a second support plate (25). Both the first support plate (24) and the second support plate (25) are fixedly connected to the outer wall of the mixer shell (1).

6. A mixing device for precast component casting according to claim 1, characterized in that: The driving mechanism includes a driving block (51) rotatably connected to the adapter shaft (5). A driving cylinder (52) is fixedly connected to the outer end of the driving block (51). A mounting seat (53) is hinged to the bottom end of the driving cylinder (52) via a pin. The mounting seat (53) is fixedly connected to the outer wall of the mixer housing (1).

7. A mixing device for precast component casting according to claim 2, characterized in that: The hopper (3) has an arc-shaped hole (6), the inner wall of the second sleeve (34) is rotatably connected to a second support shaft (7), the bottom end of the second support shaft (7) is fixedly connected to an arc-shaped plate (8), the bottom end of the hopper (3) is fixedly connected to an arc-shaped guide rail (9), and the arc-shaped plate (8) and the arc-shaped guide rail (9) are slidably connected.

8. A mixing device for precast component casting according to claim 7, characterized in that: The curvature of the arc-shaped guide rail (9) matches the motion trajectory of the second sleeve (34) when the V-shaped diverter plate (31) rotates around the first support shaft (32).