Gravel material mixing device for construction
By using a rotating shaft driven by a drive motor and a scraper assembly, combined with a sealing assembly, the problems of low mixing efficiency and uneven mixing of materials at the edges in existing mixing devices are solved, thus achieving efficient concrete production.
Patent Information
- Application Number
- CN202422780947.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing mixing devices are mostly single-shaft mixers, which have low mixing efficiency and the sand and gravel located on the edge of the mixing tank cannot be fully mixed with cement, affecting the production quality of concrete mortar.
The rotating shaft is driven by a drive motor. Through the scraper and mixing assembly, the sand and cement in the mixing tank are fully mixed. Combined with the sealing assembly, the liquid is prevented from leaking out, and the arc-shaped inner bottom facilitates material discharge.
It improves mixing efficiency, ensures thorough mixing of sand and gravel with cement, avoids uneven mixing affecting production quality, prevents liquid leakage, and ensures sufficient discharge.
Smart Images
Figure CN223657294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mixing device technology, and in particular to a sand and gravel mixing device for construction. Background Technology
[0002] In the construction process, it is usually necessary to mix sand and gravel with building materials such as cement to make concrete mortar. Currently, most common mixing devices are single-shaft mixers, which have low mixing efficiency, and the sand and gravel located at the edge of the mixing tank cannot be fully mixed with cement, affecting the production quality of concrete mortar. Therefore, a mixing device that solves the above problems is needed. Utility Model Content
[0003] To address the problems of current common mixing devices being mostly single-shaft mixers with low mixing efficiency, and the inability of sand and gravel located on the edge of the mixing tank to be fully mixed with cement, thus affecting the production quality of concrete mortar, a construction sand and gravel mixing device has been invented.
[0004] The technical solution of this utility model is a construction aggregate mixing device, including a mixing tank. Several support legs are connected to the bottom of the mixing tank. A drive motor is connected to the bottom of the mixing tank via a connecting seat. The drive motor is connected to a rotating shaft with one end extending into the mixing tank. Inside the mixing tank, the rotating shaft is connected to a scraper and a mixing assembly via a first connecting rod and a second connecting rod, respectively. This allows the scraper to push the aggregate from the edge of the mixing tank to the center, and the mixing assembly to quickly and thoroughly mix the aggregate inside the mixing tank. A sealing assembly is connected to the connecting seat and the rotating shaft to prevent liquid leakage from the mixing tank. A discharge port is provided on the side wall of the mixing tank, and a sealing door is hinged to the outer side wall of the mixing tank at the discharge port.
[0005] Preferably, a first connecting block is connected to the rotating shaft, one end of the first connecting rod is connected to the first connecting block, and the other end is connected to the scraper.
[0006] Preferably, a second connecting block is connected to the rotating shaft, one end of the second connecting rod is connected to the second connecting block, and the other end is rotatably connected to the mixing assembly.
[0007] Preferably, the mixing assembly includes a connecting shaft, a spiral mixing blade, a rotating wheel, and a connecting head. One end of the connecting shaft is connected to the connecting head, and the other end is connected to the rotating wheel. The connecting head is rotatably connected to one end of a second connecting rod. The spiral mixing blade is connected to the connecting shaft between the connecting head and the rotating wheel.
[0008] Preferably, the connector has a connecting groove, one end of the second connecting rod is inserted into the connecting groove, the connector has several sets of annularly arranged limiting holes that communicate with the connecting groove, the limiting holes are threaded with limiting bolts, the second connecting rod has several limiting ring grooves corresponding to each set of limiting holes, the limiting holes and limiting ring grooves are provided with limiting balls, the limiting holes are provided with springs, the two ends of the springs respectively abut against the limiting bolts and limiting balls, the inner sidewall of the opening of the connecting groove has a first snap-fit ring groove, the second connecting rod has a second snap-fit ring groove, and the first snap-fit ring groove and the second snap-fit ring groove are provided with first sealing rings.
[0009] Preferably, the rotating wheel is in contact with the inner bottom of the mixing tank, and the thickness of the two sides of the rotating wheel gradually decreases towards the middle, so that the side end face of the rotating wheel is an arc shape that gradually convexes towards the middle.
[0010] Preferably, the sealing assembly includes a second sealing ring, a third sealing ring, and several fourth sealing rings. A through hole is provided at the bottom of the mixing tank, through which the rotating shaft extends into the mixing tank. A third snap-fit ring groove is provided on the inner wall of the through hole, and a fourth snap-fit ring groove is provided on the rotating shaft. The second sealing ring is snapped into the third and fourth snap-fit ring grooves. A fifth snap-fit ring groove is provided on the outer end face of the bottom of the mixing tank, and a sixth snap-fit ring groove is provided on the connecting seat. The third sealing ring is snapped into the fifth and sixth snap-fit ring grooves. A connecting hole is provided on the connecting seat, and the output shaft of the drive motor is connected to the rotating shaft within the connecting hole. Several seventh snap-fit ring grooves are provided on the inner wall of the connecting hole, and several eighth snap-fit ring grooves are provided on the rotating shaft. The fourth sealing ring is snapped into the seventh and eighth snap-fit ring grooves.
[0011] Preferably, the inner bottom of the mixing tank is arc-shaped, and the height gradually decreases from the middle of the inner bottom of the mixing tank to the edge.
[0012] The following beneficial effects can be achieved by adopting the technical solution of this utility model: (1) By using the drive motor, rotating shaft, first connecting rod and scraper, the sand and gravel and cement and other building materials located at the bottom edge of the mixing tank can be pushed to the middle, which is convenient to fully mix the sand and gravel and cement and other building materials, avoiding the problem of uneven mixing affecting the low quality of concrete produced. At the same time, the sand and gravel and cement and other building materials in the mixing tank can be stirred and mixed horizontally; (2) By using the drive motor, rotating shaft, first connecting rod and mixing component, it is convenient to mix and stir the sand and gravel and cement and other building materials in the mixing tank. At the same time, the mixing efficiency can be further improved by horizontal stirring and horizontal spiral pushing; (3) By using the sealing component, the bottom of the mixing tank can be sealed without affecting the rotation of the rotating shaft, preventing the liquid in the mixing tank from leaking out along the rotating shaft; (4) By using the arc-shaped inner bottom of the mixing tank and the mixing component, the concrete in the mixing tank can be fully discharged through the discharge port; The technical solution of this utility model has a wide application prospect in the field of mixing device technology. Attached Figure Description
[0013] Figure 1 This is a cross-sectional view of the sand and gravel mixing device for construction according to this utility model.
[0014] Figure 2 for Figure 1 Enlarged view of a portion of region A in the middle.
[0015] Figure 3 This is a top view of the sand and gravel mixing device for construction according to this utility model.
[0016] Figure 4 for Figure 3 Enlarged view of a portion of region B in the middle.
[0017] The components are as follows: 1. Mixing tank; 2. Support leg; 3. Connecting plate; 4. Connecting seat; 5. Drive motor; 6. Rotating shaft; 7. First connecting block; 8. First connecting rod; 9. Scraper; 10. Second connecting block; 11. Second connecting rod; 12. Connecting shaft; 13. Connecting head; 14. Spiral mixing blade; 15. Rotating wheel; 16. Limiting hole; 17. Limiting bolt; 18. Spring; 19. Limiting ball; 20. Limiting ring. 21. First snap-fit ring groove; 22. Second snap-fit ring groove; 23. First sealing ring; 24. Discharge port; 25. Sealing gate; 26. Through hole; 27. Third snap-fit ring groove; 28. Fourth snap-fit ring groove; 29. Second sealing ring; 30. Fifth snap-fit ring groove; 31. Sixth snap-fit ring groove; 32. Third sealing ring; 33. Connecting hole; 34. Eighth snap-fit ring groove; 35. Seventh snap-fit ring groove; 36. Fourth sealing ring. Detailed Implementation
[0018] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0019] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] This application discloses a construction aggregate mixing device. (Refer to...) Figure 1 , Figure 3 The system includes a mixing tank 1. Several connecting plates 3 are detachably and bolted to the bottom of the mixing tank 1. Support legs 2 are detachably and bolted to the connecting plates 3, connecting the support legs 2 to the bottom of the mixing tank 1. The support legs 2 then stably support the mixing tank 1 on the ground. A discharge port 24 is provided on the side wall of the mixing tank 1 to facilitate the discharge of the mixed concrete. A sealing door 25 is hinged to the outer wall of the mixing tank 1 at the discharge port 24. A rubber ring is detachably and bolted to the end face of the sealing door 25 near the end of the mixing tank 1, sealing the discharge port 24 to prevent leakage of sand, gravel, cement, and other building materials during mixing. The rubber ring further seals the gap between the sealing door 25 and the mixing tank 1, preventing liquid leakage from the mixing tank 1. The bottom of the mixing tank 1 is arc-shaped, and the height gradually decreases from the middle of the bottom of the mixing tank 1 to the edge, which facilitates the full discharge of concrete in the mixing tank 1 through the discharge port 24.
[0021] Reference Figure 1 , Figure 3 The bottom of the mixing tank 1 is connected to a drive motor 5 via a connecting seat 4. The connecting seat 4 is detachably and fixedly connected to the outer bottom of the mixing tank 1 by bolts, and the drive motor 5 is detachably and fixedly connected to the connecting seat 4 by bolts, thus connecting the drive motor 5 to the mixing tank 1 via the connecting seat 4. The drive motor 5 is connected to a rotating shaft 6, one end of which extends into the mixing tank 1. Specifically, the output shaft of the drive motor 5 is detachably and fixedly connected to the rotating shaft 6 via a coupling, with one end of the rotating shaft 6 extending into the mixing tank 1. When the drive motor 5 is energized, its output shaft drives the rotating shaft 6 to rotate.
[0022] Reference Figure 1 , Figure 2A sealing assembly is connected to the connecting seat 4 and the rotating shaft 6 to prevent liquid leakage from the mixing tank 1. This sealing assembly seals the gaps between the rotating shaft 6 and the mixing tank 1, the connecting seat 4 and the mixing tank 1, and the rotating shaft 6 and the connecting seat 4, preventing liquid from leaking out of the mixing tank 1 along the rotating shaft 6 without affecting its rotation. The sealing assembly includes a second sealing ring 29, a third sealing ring 32, and several fourth sealing rings 36. A through hole 26 is provided at the bottom of the mixing tank 1, through which the rotating shaft 6 extends into the mixing tank 1, facilitating its extension into the mixing tank 1. A third locking ring groove 27 is formed on the inner wall of the through hole 26, and a fourth locking ring groove 28 is formed on the rotating shaft 6. The second sealing ring 29 is engaged in the third locking ring groove 27 and the fourth locking ring groove 28, so that the second sealing ring 29 is engaged and limited by the third locking ring groove 27 and the fourth locking ring groove 28, preventing the second sealing ring 29 from detaching from the through hole 26 and the rotating shaft 6. In turn, the second sealing ring 29 seals the gap between the rotating shaft 6 and the mixing tank 1, preventing the liquid in the mixing tank 1 from leaking out from the gap between the rotating shaft 6 and the mixing tank 1. The third locking ring groove 27 and the fourth locking ring groove 28 are close to the inner bottom of the mixing tank 1 to prevent excessive sand, gravel, cement and other building materials in the mixing tank 1 from entering the gap between the rotating shaft 6 and the mixing tank 1, which would affect the rotation of the rotating shaft 6. A fifth snap-fit groove 30 is provided on the bottom outer end face of the mixing tank 1, and a sixth snap-fit groove 31 is provided on the connecting seat 4. The third sealing ring 32 is snapped into the fifth snap-fit groove 30 and the sixth snap-fit groove 31, so that the third sealing ring 32 is snapped and limited by the fifth snap-fit groove 30 and the sixth snap-fit groove 31, preventing the third sealing ring 32 from detaching from the bottom of the connecting seat 4 and the mixing tank 1, and thus sealing the gap between the connecting seat 4 and the mixing tank 1. A connecting hole 33 is provided on the connecting seat 4, and the output shaft of the drive motor 5 and the rotating shaft 6 are detachably and fixedly connected in the connecting hole 33 by a coupling, so that the rotating shaft 6 and the output shaft of the drive motor 5 can pass through the connecting hole 33 through the connecting seat 4. The inner wall of the connecting hole 33 is provided with several seventh locking ring grooves 35, and the rotating shaft 6 is provided with several eighth locking ring grooves 34. The fourth sealing ring 36 is locked in the seventh and eighth sealing ring grooves, so that the fourth sealing ring 36 is locked and limited by the seventh locking ring grooves 35 and the eighth locking ring grooves 34, preventing the fourth sealing ring 36 from detaching from the connecting seat 4 and the rotating shaft 6, and thus sealing the gap between the connecting seat 4 and the rotating shaft 6 by the fourth sealing ring 36.
[0023] Reference Figure 1 , Figure 3 , Figure 4The rotating shaft 6 is connected to a scraper 9 and a mixing assembly inside the mixing tank 1 via a first connecting rod 8 and a second connecting rod 11, respectively. The scraper 9 pushes the sand and gravel from the edge of the mixing tank 1 to the center, while the mixing assembly rapidly and thoroughly mixes the sand and gravel within the mixing tank 1. Specifically, a first connecting block 7 is detachably fixed to the rotating shaft 6 via bolts, allowing it to rotate simultaneously with the rotating shaft 6. One end of the first connecting rod 8 is welded to or detachably fixed to the first connecting block 7 via bolts, and the other end is detachably fixed to the scraper 9 via bolts. The scraper 9 is connected to the first connecting block 7 via the first connecting rod 8, and then to the rotating shaft 6, enabling the rotating shaft 6 to rotate. The first connecting rod 8 drives the scraper 9 to rotate, and the arc-shaped end face of the scraper 9 pushes the sand, gravel, cement, and other building materials from the edge of the mixing tank 1 to the center, where the first connecting rod 8, the second connecting rod 11, and the mixing assembly thoroughly mix the sand, gravel, cement, and other building materials. A second connecting block 10 is detachably and fixedly connected to the rotating shaft 6 by bolts, so that the second connecting block 10 and the rotating shaft 6 are connected together and can rotate simultaneously. One end of the second connecting rod 11 is welded or detachably and fixedly connected to the second connecting block 10 by bolts, and the other end is rotatably connected to the mixing component, so that the mixing component is connected to the second connecting block 10 through the second connecting rod 11, and then connected to the rotating shaft 6. This allows the rotating shaft 6 to rotate, which in turn drives the mixing component to rotate through the second connecting rod 11, mixing and stirring the sand, gravel and cement and other building materials in the mixing tank 1, without the mixing component needing to rotate relative to the second connecting rod 11.
[0024] Reference Figure 1 , Figure 3 , Figure 4The mixing assembly includes a connecting shaft 12, spiral mixing blades 14, a rotating wheel 15, and a connector 13. One end of the connecting shaft 12 is welded to the connector 13, and the other end is detachably fixed to the rotating wheel 15 by bolts. This allows the rotating wheel 15 and the connector 13 to be connected together as a whole, enabling them to rotate simultaneously with the rotating shaft 6 and relative to the second connecting rod 11. The rotating wheel 15 contacts the inner bottom of the mixing tank 1, allowing it to rotate on its own axis as it rotates with the rotating shaft 6, thereby driving the connecting shaft 12 to rotate relative to the second connecting rod 11. The thickness of the rotating wheel 15 gradually decreases towards the center from both sides, resulting in a gradually convex arc shape on the side end face of the rotating wheel 15. This allows the arc-shaped end face of the rotating wheel 15 in contact with the mixing tank 1 to push away stones in its path, preventing the rotating wheel 15 from crushing stones and thus affecting its rotation with the rotating shaft 6. The connector 13 is rotatably connected to one end of the second connecting rod 11, thereby connecting the connecting shaft 12 and the second connecting rod 11 together. This allows the connecting shaft 12 to rotate simultaneously with the second connecting rod 11 and the rotating shaft 6, and also allows the connecting shaft 12 to rotate relative to the second connecting rod 11. The spiral mixing blade 14 is welded or detachably fixed to the connecting shaft 12 between the connector 13 and the rotating wheel 15, allowing the spiral mixing blade 14 to rotate together with the connecting shaft 12. This enables the spiral mixing blade 14 to rotate about the rotating shaft 6 and also rotate on its own axis under the drive of the rotating wheel 15, achieving rapid mixing of sand, gravel, cement, and other building materials in the mixing tank 1.
[0025] Reference Figure 1 , Figure 3 , Figure 4The connector 13 has a connecting groove, and one end of the second connecting rod 11 is inserted into the connecting groove to facilitate the connection of the connector 13 and the second connecting rod 11. The connector 13 has several sets of annularly arranged limiting holes 16 that communicate with the connecting groove. Limiting bolts 17 are threaded into the limiting holes 16, sealing the external openings of the limiting holes 16 and limiting the components within them. The second connecting rod 11 has several limiting ring grooves 20 corresponding to each set of limiting holes 16. Limiting balls 19 are provided in the limiting holes 16 and the limiting ring grooves 20, limiting the connection between the connector 13 and the second connecting rod 11 and allowing for a rotatable connection. A spring 18 is provided in the limiting hole 16. The two ends of the spring 18 abut against the limiting bolt 17 and the limiting ball 19 respectively, so that the spring 18 provides elastic force to the limiting ball 19, preventing the limiting ball 19 from disengaging from the limiting ring groove 20 and automatically retracting into the limiting hole 16, thus affecting the connection state between the connector 13 and the second connecting rod 11. A first snap-fit ring groove 21 is provided on the inner side wall of the opening of the connecting groove, and a second snap-fit ring groove 22 is provided on the second connecting rod 11. A first sealing ring 23 is provided in the first snap-fit ring groove 21 and the second snap-fit ring groove 22, so that the first sealing ring 23 is snapped and limited by the first snap-fit ring groove 21 and the second snap-fit ring groove 22, preventing the first sealing ring 23 from detaching from the connector 13 and the second connecting rod 11. In turn, the first sealing ring 23 seals the gap between the connector 13 and the second connecting rod 11, preventing the liquid in the mixing tank 1 from entering the connecting groove from the gap between the connector 13 and the second connecting rod 11, thus affecting the rotational connection between the connector 13 and the second connecting rod 11.
[0026] In use, sand, gravel, cement, and other building materials are placed into the mixing tank 1. Then, the drive motor 5 is powered on, and its output shaft drives the rotating shaft 6 to rotate. This, in turn, drives the scraper 9 and the mixing assembly to rotate via the first connecting rod 8 and the second connecting rod 11, thus mixing and stirring the sand, gravel, cement, and other building materials in the mixing tank 1. When the second connecting rod 11 rotates around the rotating shaft 6, it drives the rotating wheel 15 to rotate. The rotating wheel 15 drives the connecting shaft 12 to rotate, and the connecting shaft 12 drives the spiral mixing blades 14 to rotate. This achieves horizontal spiral conveying and stirring of the sand, gravel, cement, and other building materials in the mixing tank 1. Multiple spiral mixing blades 14 spirally convey the sand, gravel, cement, and other building materials towards the rotating shaft 6, enabling the sand, gravel, cement, and other building materials to generate vertical stirring, thereby further improving the mixing efficiency of the sand, gravel, cement, and other building materials in the mixing tank 1.
[0027] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.
[0028] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A construction aggregate mixing device, comprising a mixing tank (1), characterized in that, The bottom of the mixing tank (1) is connected to several support legs (2). The bottom of the mixing tank (1) is connected to a drive motor (5) via a connecting seat (4). The drive motor (5) is connected to a rotating shaft (6) with one end extending into the mixing tank (1). The rotating shaft (6) is connected to a scraper (9) and a mixing assembly via a first connecting rod (8) and a second connecting rod (11) in the mixing tank (1), respectively. The scraper (9) pushes the sand and gravel and cement building materials on the edge of the mixing tank (1) to the middle. The mixing assembly quickly and thoroughly mixes the sand and gravel in the mixing tank (1). A sealing assembly is connected to the connecting seat (4) and the rotating shaft (6) to prevent the liquid in the mixing tank (1) from leaking out. A discharge port (24) is opened on the side wall of the mixing tank (1). A sealing door (25) is hinged to the outer side wall of the mixing tank (1) at the discharge port (24).
2. The construction aggregate mixing device according to claim 1, characterized in that, The rotating shaft (6) is connected to a first connecting block (7), one end of the first connecting rod (8) is connected to the first connecting block (7), and the other end is connected to the scraper (9).
3. The construction aggregate mixing device according to claim 1, characterized in that, A second connecting block (10) is connected to the rotating shaft (6). One end of the second connecting rod (11) is connected to the second connecting block (10), and the other end is rotatably connected to the mixing assembly.
4. The construction aggregate mixing device according to claim 3, characterized in that, The mixing assembly includes a connecting shaft (12), a spiral mixing blade (14), a rotating wheel (15), and a connecting head (13). One end of the connecting shaft (12) is connected to the connecting head (13), and the other end is connected to the rotating wheel (15). The connecting head (13) is rotatably connected to one end of the second connecting rod (11). The spiral mixing blade (14) is connected to the connecting shaft (12) between the connecting head (13) and the rotating wheel (15).
5. The construction aggregate mixing device according to claim 4, characterized in that, The connector (13) has a connecting groove, and one end of the second connecting rod (11) is inserted into the connecting groove. The connector (13) has several sets of limit holes (16) arranged in a ring and connected to the connecting groove. Limit bolts (17) are threaded into the limit holes (16). The second connecting rod (11) has several limit ring grooves (20) corresponding to each set of limit holes (16). Limit balls (19) are provided in the limit holes (16) and limit ring grooves (20). Springs (18) are provided in the limit holes (16). The two ends of the springs (18) abut against the limit bolts (17) and limit balls (19) respectively. A first snap ring groove (21) is provided on the inner sidewall of the opening of the connecting groove. A second snap ring groove (22) is provided on the second connecting rod (11). A first sealing ring (23) is provided in the first snap ring groove (21) and the second snap ring groove (22).
6. The construction aggregate mixing device according to claim 4, characterized in that, The rotating wheel (15) is in contact with the inner bottom of the mixing tank (1). The thickness of the two sides of the rotating wheel (15) gradually decreases towards the middle, so that the side end face of the rotating wheel (15) is an arc shape that gradually bulges towards the middle.
7. The construction aggregate mixing device according to claim 1, characterized in that, The sealing assembly includes a second sealing ring (29), a third sealing ring (32), and several fourth sealing rings (36). A through hole (26) is provided at the bottom of the mixing tank (1). The rotating shaft (6) extends into the mixing tank (1) through the through hole (26). A third snap-fit groove (27) is provided on the inner side wall of the through hole (26). A fourth snap-fit groove (28) is provided on the rotating shaft (6). The second sealing ring (29) is snapped into the third snap-fit groove (27) and the fourth snap-fit groove (28). A fifth snap-fit groove is provided on the outer end face of the bottom of the mixing tank (1). (30) A sixth snap-fit ring groove (31) is provided on the connecting seat (4). The third sealing ring (32) is snapped into the fifth snap-fit ring groove (30) and the sixth snap-fit ring groove (31). A connecting hole (33) is provided on the connecting seat (4). The output shaft of the drive motor (5) is connected to the rotating shaft (6) in the connecting hole (33). A plurality of seventh snap-fit ring grooves (35) are provided on the inner side wall of the connecting hole (33). A plurality of eighth snap-fit ring grooves (34) are provided on the rotating shaft (6). The fourth sealing ring (36) is snapped into the seventh sealing ring groove and the eighth sealing ring groove.
8. The construction aggregate mixing device according to claim 1, characterized in that, The inner bottom of the mixing tank (1) is arc-shaped, and the height gradually decreases from the middle of the inner bottom of the mixing tank (1) to the edge.