A concrete mixing device
By designing a concrete mixing device that includes a rotating drive assembly and a vertical reciprocating drive assembly, the problems of low mixing efficiency and insufficient mixing in existing equipment are solved, and more efficient concrete mixing is achieved and the concrete quality is improved.
Patent Information
- Application Number
- CN202420680120.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The mixing efficiency of existing concrete mixing equipment is too slow during mixing, so it is impossible to fully mix concrete materials, affecting the quality of concrete and reducing the working efficiency of the equipment.
A mixing device including a base, a mixing tank, a rotary drive assembly and a vertical reciprocating drive assembly are designed. Horizontal rotating agitation is achieved by rotating the drive assembly, and vertical reciprocating agitation is achieved by vertical reciprocating drive assembly. Combined with the design of the inclined agitation plate, the agitation efficiency is enhanced.
It realizes more full mixing of concrete raw materials, improves the mixing efficiency of concrete, and ensures improvement of concrete quality.
Smart Images
Figure CN222726998U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of concrete, and in particular relates to a concrete mixing device. Background Art
[0002] In the field of construction engineering, concrete is a commonly used building material. It is a mixture of sand, gravel, cementitious materials and water. It needs to be mixed evenly by a mixing device. Since the combined materials of concrete are thick and difficult to mix evenly, and the construction process has very strict requirements on materials, once the mixing quality of concrete is not up to standard, it will have a very large impact on the quality of the building. Therefore, a mixing device is needed to mix the concrete materials.
[0003] At present, when concrete is processed, mixing equipment is needed to mix the concrete. Current concrete mixing equipment usually uses a stirring motor to drive a stirring beater to mix the concrete. The stirring efficiency is too slow during mixing, and the materials cannot be fully mixed, which affects the mixing quality of the concrete and greatly reduces the working efficiency of the equipment. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a concrete mixing device to solve the problem that when existing concrete is processed, a mixing device needs to be used to mix the concrete. The current concrete mixing equipment usually uses a stirring motor to drive a stirring beater to mix the concrete. The stirring efficiency is too slow during mixing, and the materials cannot be fully mixed, which affects the mixing quality of the concrete and greatly reduces the working efficiency of the equipment.
[0005] The technical solution adopted by the utility model is as follows: a concrete mixing device comprises a base, a mixing tank is vertically mounted on the base, and the upper end of the mixing tank is open;
[0006] A mixing mechanism, the mixing mechanism comprising a support frame, a rotation drive assembly, a vertical reciprocating drive assembly, a rotating shaft and a stirring assembly;
[0007] The support frame is arranged on one side of the base, the rotating shaft is vertically movably sleeved on the support frame, the stirring assembly is arranged at the lower part of the rotating shaft, and the lower part of the rotating shaft and the stirring assembly can both extend into the mixing tank, the rotation drive assembly is arranged on the support frame, and the driving end of the rotation drive assembly is connected to the upper part of the rotating shaft, and can drive the rotating shaft to rotate on the support frame, the vertical reciprocating drive assembly is arranged on the support frame and is located below the rotation drive assembly, and the driving end of the vertical reciprocating drive assembly is connected to the upper part of the rotating shaft, and can drive the rotating shaft to reciprocate vertically on the support frame.
[0008] Furthermore, the rotation drive assembly includes a first motor, a first gear and a second gear; the first motor is vertically fixedly installed on a support frame, the driving end of the first motor is downward and is transmission-connected to the first gear, the second gear is fixedly sleeved on the upper part of the rotating shaft, the first gear and the second gear are meshed, and the thickness of the second gear is greater than the thickness of the first gear.
[0009] Furthermore, the vertical reciprocating drive assembly includes a support plate, a second motor, a driving plate, a sliding rod and a limit plate; the limit plates are provided with two, and the two limit plates are fixedly sleeved on the rotating shaft at a vertical interval and are located below the second gear; the support plate is fixedly provided on the rear side wall of the support frame, and the second motor is fixedly installed on the front side wall of the support plate; the driving end of the second motor is connected forwardly to the left end of the driving plate and can drive the driving plate to swing back and forth vertically; an insertion groove is opened to the left on the right side wall of the driving plate, and sliding rods are fixedly connected to the front and rear inner walls of the insertion groove; the two limit plates are both located in the insertion grooves, and the two sliding rods are slidably fitted between the two limit plates.
[0010] Furthermore, the stirring assembly is provided with an array, and the array stirring assembly is vertically arrayed on the rotating shaft. The stirring assembly includes a connecting block and a stirring plate, and the stirring plate is obliquely arranged on the outer peripheral wall of the rotating shaft through the connecting block, and the front end of the stirring plate is inclined downward, and the rear end of the stirring plate is inclined upward.
[0011] Further, it also includes a turntable and a scraping mechanism, the turntable is rotatably mounted on the top of the base, the bottom of the mixing tank is fixedly connected to the top of the turntable, and the scraping mechanism includes a mounting plate, a third motor, a third gear, a gear ring, a first scraper and a second scraper; the mounting plate is fixedly arranged on the support frame and is located above the mixing tank, the third motor is vertically fixedly connected to the bottom of the mounting plate, the driving end of the third motor is downwardly connected to the third gear for transmission, the gear ring is fixedly sleeved on the outer peripheral wall of the mixing tank and is located at the upper part of the mixing tank, the third gear is meshed with the gear ring, the first scraper is vertically arranged in the mixing tank and is located on the outside of the stirring assembly, the upper end of the first scraper is fixedly connected to the bottom of the mounting plate, the lower end of the first scraper abuts against the inner bottom of the mixing tank, the outer side wall of the first scraper abuts against the inner side wall of the mixing tank, the outer side wall of the second scraper is fixedly connected to the inner side wall of the first scraper, the inner end of the second scraper extends to the center of the mixing tank, and the bottom of the second scraper abuts against the inner bottom of the mixing tank.
[0012] Furthermore, the outer wall of the mixing tank is connected with a discharge pipe, and a butterfly valve is arranged on the discharge pipe.
[0013] Beneficial effects of the utility model:
[0014] First, pour the concrete raw materials into the mixing tank, and start the rotating drive component to drive the rotating shaft to rotate, thereby driving the stirring component to rotate, so as to horizontally rotate and stir the concrete raw materials in the mixing tank; start the vertical reciprocating drive component to drive the rotating shaft to move vertically back and forth on the support frame, thereby driving the stirring component to move vertically back and forth, so that the concrete raw materials at different vertical layers in the mixing tank are vertically reciprocated and stirred, and are fully mixed vertically. This device performs horizontal rotation stirring and vertical reciprocating stirring on the concrete raw materials in the mixing tank, so that the concrete raw materials are mixed more fully and the mixing efficiency of the concrete is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is the front view of the utility model;
[0017] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;
[0018] Figure 4 It is a three-dimensional structural schematic diagram of the rotary drive assembly and the vertical reciprocating drive assembly of the utility model (the support plate is not shown in the figure);
[0019] Figure 5 It is a partial structural schematic diagram of the mixing tank of the utility model;
[0020] The attached drawings are marked as follows:
[0021] Base 1, mixing tank 11, turntable 12, discharge pipe 13, butterfly valve 14, mixing mechanism 2, support frame 21, rotating shaft 22, rotation drive assembly 3, first motor 31, first gear 32, second gear 33, vertical reciprocating drive assembly 4, support plate 41, second motor 42, drive plate 43, sliding rod 44, limit plate 45, insertion groove 46, stirring assembly 5, connecting block 51, stirring plate 52, scraping mechanism 6, mounting plate 61, third motor 62, third gear 63, gear ring 64, first scraper 65, second scraper 66. DETAILED DESCRIPTION
[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0023] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] Embodiment 1:
[0026] like Figure 1 to Figure 5 As shown, a concrete mixing device comprises a base 1, on which a mixing tank 11 is vertically mounted, and the upper end of the mixing tank 11 is open;
[0027] A mixing mechanism 2, the mixing mechanism 2 comprising a support frame 21, a rotation drive assembly 3, a vertical reciprocating drive assembly 4, a rotating shaft 22 and a stirring assembly 5;
[0028] The support frame 21 is arranged on one side of the base 1, and the rotating shaft 22 is vertically movably sleeved on the support frame 21. The stirring assembly 5 is arranged at the lower part of the rotating shaft 22, and the lower part of the rotating shaft 22 and the stirring assembly 5 can both extend into the mixing tank 11. The rotating drive assembly 3 is arranged on the support frame 21, and the driving end of the rotating drive assembly 3 is connected to the upper part of the rotating shaft 22, and can drive the rotating shaft 22 to rotate on the support frame 21. The vertical reciprocating drive assembly 4 is arranged on the support frame 21 and is located below the rotating drive assembly 3. The driving end of the vertical reciprocating drive assembly 4 is connected to the upper part of the rotating shaft 22, and can drive the rotating shaft 22 to move vertically reciprocatingly on the support frame 21.
[0029] As a preferred solution, the rotation drive assembly 3 includes a first motor 31, a first gear 32, and a second gear 33; the first motor 31 is vertically fixedly installed on the support frame 21, the driving end of the first motor 31 is downward and is in transmission connection with the first gear 32, the second gear 33 is fixedly sleeved on the upper part of the rotating shaft 22, the first gear 32 and the second gear 33 are meshed, and the thickness of the second gear 33 is greater than the thickness of the first gear 32; in this embodiment, the thickness of the second gear 33 is D cm, the thickness of the first gear 32 is H cm, and D>H. By starting the first motor 31 to drive the first gear 32 to rotate, the first gear 32 rotates to drive the second gear 33 to rotate, and the second gear 33 drives the rotating shaft 22 and the stirring assembly 5 to rotate, so as to horizontally stir the concrete raw materials in the mixing tank 11 and mix the concrete raw materials.
[0030] As a preferred embodiment, the vertical reciprocating drive assembly 4 includes a support plate 41, a second motor 42, a drive plate 43, a sliding rod 44 and a limit plate 45; the limit plates 45 are provided in two, and the two limit plates 45 are fixedly sleeved on the rotating shaft 22 at intervals in a vertical direction and are located below the second gear 33; the support plate 41 is fixedly arranged on the rear side wall of the support frame 21; the second motor 42 is fixedly installed on the front side wall of the support plate 41; the driving end of the second motor 42 is connected to the left end of the drive plate 43 forward, and can drive the drive plate 43 to swing back and forth vertically; the right side wall of the drive plate 43 is provided with an insertion groove 46 to the left, and the The front and rear inner walls of the insertion groove 46 are fixedly connected with sliding rods 44, and the two limit plates 45 are located in the insertion groove 46. The two sliding rods 44 are slidably fitted between the two limit plates 45, and the movable rods on the front and rear sides are slidably fitted on the front and rear sides of the two limit plates 45 respectively; the driving plate 43 can drive the sliding rod 44 to move the limit plates 45 vertically, thereby driving the rotating shaft 22 and the stirring assembly 5 to move vertically. When the rotating shaft 22 moves vertically, the second gear 33 slides vertically along the outer side wall of the first gear 32. When the stirring assembly 5 moves vertically, it can drive the concrete raw materials in the mixing tank 11 to move vertically in the mixing tank 11. The second motor 42 is started to drive the driving plate 43 to swing back and forth vertically, thereby driving the sliding rods 44 on the front and rear sides of the insertion groove 46 of the driving plate 43 to move back and forth vertically between the two limit plates 45, thereby driving the rotating shaft 22 and the stirring assembly 5 to move back and forth vertically, so that the concrete raw materials in the mixing tank 11 are vertically reciprocated and stirred by the stirring assembly 5, so that the concrete raw materials are mixed more fully.
[0031] As a preferred embodiment, the stirring assembly 5 is provided with an array, and the array stirring assembly 5 is vertically arrayed on the rotating shaft 22, and the array stirring assembly 5 is symmetrically distributed on both sides of the rotating shaft 22. The stirring assembly 5 includes a connecting block 51 and a stirring plate 52, and the stirring plate 52 is obliquely arranged on the outer peripheral wall of the rotating shaft 22 through the connecting block 51, and the front end of the stirring plate 52 is inclined downward, and the rear end of the stirring plate 52 is inclined upward. By means of the array stirring components 5 arranged in a vertical array, the concrete raw materials in the mixing tank 11 are mixed more evenly, and the stirring end is set as a stirring plate 52 in an inclined state, so that when the rotating drive component 3 drives the rotating shaft 22 to rotate, the stirring plates 52 arranged in the array are driven to rotate, and the inclined stirring plates 52 have a wider stirring range during rotation and stirring, and the stirring of the concrete raw materials is more sufficient, and the stirring efficiency is higher; when the vertical reciprocating drive component 4 drives the rotating shaft 22 and the stirring component 5 to reciprocate vertically, it can drive the stirring plates 52 in an inclined state to reciprocate vertically, thereby driving the concrete raw materials at different vertical layers in the mixing tank 11 to be fully mixed vertically, so that the mixing efficiency of the concrete is higher.
[0032] As a preferred embodiment, it also includes a turntable 12 and a scraping mechanism 6, wherein the turntable 12 is rotatably mounted on the top of the base 1, and the bottom of the mixing tank 11 is fixedly connected to the top of the turntable 12, and the scraping mechanism 6 includes a mounting plate 61, a third motor 62, a third gear 63, a gear ring 64, a first scraper 65 and a second scraper 66; the mounting plate 61 is fixedly arranged on the support frame 21 and is located above the mixing tank 11, the lower end of the rotating shaft 22 downwardly penetrates the mounting plate 61 and is connected to the stirring assembly 5, the rotating shaft 22 is movably connected to the mounting plate 61, the third motor 62 is vertically fixedly connected to the bottom of the mounting plate 61, and the driving end of the third motor 62 is downwardly connected to the third gear 63. The gear ring 64 is fixedly sleeved on the outer peripheral wall of the mixing tank 11 and is located at the upper part of the mixing tank 11. The third gear 63 is meshed with the gear ring 64. The first scraper 65 is vertically arranged in the mixing tank 11 and is located on the outer side of the stirring assembly 5. The upper end of the first scraper 65 is fixedly connected to the bottom of the mounting plate 61, and the lower end of the first scraper 65 abuts against the inner bottom of the mixing tank 11. The outer side wall of the first scraper 65 abuts against the inner side wall of the mixing tank 11. The outer side wall of the second scraper 66 is fixedly connected to the inner side wall of the first scraper 65. The inner end of the second scraper 66 extends to the center of the mixing tank 11, and the bottom of the second scraper 66 abuts against the inner bottom of the mixing tank 11. The third motor 62 is started to drive the third gear 63 to rotate, the third gear 63 drives the gear ring 64 to rotate, and the gear ring 64 drives the mixing tank 11 to rotate slowly on the turntable 12. Since the first scraper 65 is fixedly connected to the bottom of the mounting plate 61, when the mixing tank 11 rotates slowly, the first scraper 65 can scrape the inner circumferential wall of the mixing tank 11 circumferentially to prevent the concrete raw materials from solidifying on the inner side wall of the mixing tank 11, and the second scraper 66 can scrape the inner bottom of the mixing tank 11 circumferentially to prevent the concrete raw materials from solidifying on the inner bottom wall of the mixing tank 11. Further, the concrete raw materials in the mixing tank 11 are mixed more fully to avoid waste of concrete raw materials.
[0033] As a preferred solution, a discharge pipe 13 is connected to the outer wall of the mixing tank 11, and the discharge pipe 13 is located at the bottom of the outer wall of the mixing tank 11. A butterfly valve 14 is provided on the discharge pipe 13. By connecting the discharge pipe 13 and the butterfly valve 14 used in conjunction with the mixing tank 11, it is convenient to discharge the concrete after being evenly mixed in the mixing tank 11.
[0034] The working mode of the utility model is as follows:
[0035] When in use, first pour the concrete raw material into the mixing tank 11, start the first motor 31 to drive the first gear 32 to rotate, the first gear 32 rotates to drive the second gear 33 to rotate, the second gear 33 drives the rotating shaft 22 and the stirring assembly 5 to rotate, so as to horizontally rotate and stir the concrete raw material in the mixing tank 11. Since the stirring end is provided with a stirring plate 52 in an inclined state, when the rotating drive assembly 3 drives the rotating shaft 22 to rotate, it drives the stirring plates 52 arranged in the array to rotate. The inclined stirring plates 52 have a wider stirring range when rotating and stirring, and the concrete is stirred more The soil raw material is stirred more fully and the stirring efficiency is higher; then the second motor 42 is started to drive the driving plate 43 to swing back and forth vertically, thereby driving the sliding rods 44 on the front and rear sides of the insertion groove 46 of the driving plate 43 to move back and forth vertically between the two limit plates 45, thereby driving the rotating shaft 22 and the stirring assembly 5 to move back and forth vertically, and driving the stirring plate 52 in the inclined state to move back and forth vertically, so that the concrete raw materials at different vertical layers in the mixing tank 11 are vertically reciprocated and stirred, and are fully mixed vertically, so that the mixing efficiency of the concrete is higher;
[0036] In addition, the third motor 62 is started to drive the third gear 63 to rotate, the third gear 63 drives the gear ring 64 to rotate, and the gear ring 64 drives the mixing tank 11 to rotate slowly on the turntable 12. Since the first scraper 65 is fixedly connected to the bottom of the mounting plate 61, when the mixing tank 11 rotates slowly, the first scraper 65 can scrape the inner circumferential wall of the mixing tank 11 in a circumferential direction to prevent the concrete raw materials from solidifying on the inner side wall of the mixing tank 11, and the second scraper 66 can scrape the inner bottom of the mixing tank 11 in a circumferential direction to prevent the concrete raw materials from solidifying on the inner bottom wall of the mixing tank 11. Further, the concrete raw materials in the mixing tank 11 are mixed more fully to avoid waste of concrete raw materials.
[0037] After the mixing is completed, the concrete evenly mixed in the mixing tank 11 is discharged through the discharge pipe 13 connected to the mixing tank 11 and the butterfly valve 14 used in conjunction with the mixing tank 11.
[0038] In addition, the first motor 31 and the second motor 42 can be started at the same time, the first motor 31 drives the first gear 32 to rotate, the first gear 32 rotates to drive the second gear 33 to rotate, the second gear 33 drives the rotating shaft 22 and the stirring assembly 5 to rotate, and the concrete raw materials in the mixing tank 11 are mixed by the stirring assembly 5, and the second motor 42 drives the driving plate 43 to swing back and forth vertically, thereby driving the sliding rods 44 on the front and rear sides of the driving plate 43 in the slot 46 to move back and forth vertically between the two limit plates 45, thereby driving the rotating shaft 22 and the stirring assembly 5. The moving assembly 5 moves back and forth vertically. When the rotating shaft 22 moves vertically, since the thickness of the second gear 33 is greater than that of the first gear 32, the second gear 33 slides vertically along the outer wall of the first gear 32, driving the inclined stirring plate 52 to move back and forth vertically, so that the concrete raw materials at different vertical levels in the mixing tank 11 are vertically reciprocated and stirred, and are fully mixed vertically, so that the concrete raw materials in the mixing tank 11 can be horizontally rotated and stirred and vertically reciprocated at the same time, and the mixing effect is better, thereby improving the mixing efficiency of the concrete.
[0039] The utility model is described in detail above. The description of the specific embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A concrete mixing device, characterized in that: include A base (1), a mixing tank (11) being vertically mounted on the base (1), the upper end of the mixing tank (11) being open; A mixing mechanism (2), the mixing mechanism (2) comprising a support frame (21), a rotation drive assembly (3), a vertical reciprocating drive assembly (4), a rotating shaft (22) and a stirring assembly (5); The support frame (21) is arranged on one side of the base (1); the rotating shaft (22) is vertically movably sleeved on the support frame (21); the stirring assembly (5) is arranged at the lower part of the rotating shaft (22); the lower part of the rotating shaft (22) and the stirring assembly (5) can both extend into the mixing tank (11); the rotating drive assembly (3) is arranged on the support frame (21); the driving end of the rotating drive assembly (3) is connected to the upper part of the rotating shaft (22) and can drive the rotating shaft (22) to rotate on the support frame (21); the vertical reciprocating drive assembly (4) is arranged on the support frame (21) and is located below the rotating drive assembly (3); the driving end of the vertical reciprocating drive assembly (4) is connected to the upper part of the rotating shaft (22) and can drive the rotating shaft (22) to move vertically reciprocatingly on the support frame (21).
2. A concrete mixing device according to claim 1, characterized in that: The rotation drive assembly (3) comprises a first motor (31), a first gear (32) and a second gear (33); the first motor (31) is vertically fixedly mounted on the support frame (21); the driving end of the first motor (31) is downwardly facing and is in transmission connection with the first gear (32); the second gear (33) is fixedly sleeved on the upper part of the rotating shaft (22); the first gear (32) and the second gear (33) are meshed; the thickness of the second gear (33) is greater than the thickness of the first gear (32).
3. A concrete mixing device according to claim 2, characterized in that: The vertical reciprocating drive assembly (4) comprises a support plate (41), a second motor (42), a drive plate (43), a sliding rod (44) and a limit plate (45); the limit plates (45) are provided in two numbers, the two limit plates (45) are fixedly sleeved on the rotating shaft (22) at intervals in a vertical direction and are located below the second gear (33); the support plate (41) is fixedly arranged on the rear side wall of the support frame (21); the second motor (42) is fixedly mounted on the support plate (41); On the front side wall, the driving end of the second motor (42) is connected to the left end of the driving plate (43) forwardly, and can drive the driving plate (43) to swing back and forth vertically. The right side wall of the driving plate (43) is provided with an insertion groove (46) to the left, and the front and rear inner side walls of the insertion groove (46) are fixedly connected with sliding rods (44), and the two limiting plates (45) are both located in the insertion groove (46), and the two sliding rods (44) are slidably matched between the two limiting plates (45).
4. A concrete mixing device according to claim 1, characterized in that: The stirring assembly (5) is provided with an array, and the array stirring assembly (5) is arranged in a vertical array on the rotating shaft (22). The stirring assembly (5) comprises a connecting block (51) and a stirring plate (52). The stirring plate (52) is obliquely arranged on the outer peripheral wall of the rotating shaft (22) through the connecting block (51), and the front end of the stirring plate (52) is inclined downward, and the rear end of the stirring plate (52) is inclined upward.
5. A concrete mixing device according to claim 1, characterized in that: The invention also comprises a rotating disk (12) and a scraping mechanism (6), wherein the rotating disk (12) is rotatably mounted on the top of the base (1), and the bottom of the mixing tank (11) is fixedly connected to the top of the rotating disk (12). The scraping mechanism (6) comprises a mounting plate (61), a third motor (62), a third gear (63), a gear ring (64), a first scraper (65) and a second scraper (66); the mounting plate (61) is fixedly arranged on the support frame (21) and is located above the mixing tank (11); the third motor (62) is vertically fixedly connected to the bottom of the mounting plate (61); the driving end of the third motor (62) is downwardly connected to the third gear (63) in a transmission manner; the gear ring (64) is fixedly sleeved on the outer peripheral wall of the mixing tank (11). , and is located at the upper part of the mixing tank (11), the third gear (63) is meshed with the gear ring (64), the first scraper (65) is vertically arranged in the mixing tank (11) and is located on the outside of the stirring assembly (5), the upper end of the first scraper (65) is fixedly connected to the bottom of the mounting plate (61), the lower end of the first scraper (65) abuts against the inner bottom of the mixing tank (11), the outer side wall of the first scraper (65) abuts against the inner side wall of the mixing tank (11), the outer side wall of the second scraper (66) is fixedly connected to the inner side wall of the first scraper (65), the inner end of the second scraper (66) extends to the center of the mixing tank (11), and the bottom of the second scraper (66) abuts against the inner bottom of the mixing tank (11).
6. A concrete mixing device according to claim 1, characterized in that: The outer wall of the mixing tank (11) is connected to a discharge pipe (13), and a butterfly valve (14) is provided on the discharge pipe (13).