Concrete mixer
By improving the double-helix blade design and transmission mechanism of the concrete mixer, the problems of uneven mixing and blind spots in mixing have been solved, resulting in more efficient concrete mixing and quality control, and reducing dust generation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-20
AI Technical Summary
Existing concrete mixers are prone to problems such as concrete sticking to the shaft, slow flow circulation speed, and uneven mixing during the mixing process. In particular, there are blind spots in the corners and edges of the hopper, and it is difficult to effectively scrape off the concrete adhering to the hopper wall.
The design employs a double helical blade. The stirring shaft is rotatably mounted onto the frame by setting up supports, fixed seats, and sleeves. The transmission mechanism causes the helical blades and stirring blades to rotate in opposite directions. Combined with the semi-circular structure at the bottom of the mixing tank and the contact between the helical blades and the inner wall of the mixing tank, the blind zone of stirring is reduced and the deposits on the inner wall are scraped off. At the same time, the structure of the feed hopper and cover plate is optimized to reduce dust and improve airtightness.
It significantly reduces the mixing blind zone, improves the uniformity of concrete mixing and production quality, ensures uniform mixing and continuous supply of concrete, and reduces dust generation.
Smart Images
Figure CN224012658U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to concrete processing technical field, concretely relates to a concrete mixer. BACKGROUND
[0002] As a basic material widely used in the construction industry, the production process and quality control management of concrete play a crucial role in ensuring the quality of construction projects and improving construction efficiency. As the core equipment of concrete production, the concrete mixer is responsible for mixing cement, aggregate, water and other additives in a certain proportion and stirring them into concrete with uniform pouring performance. The concrete mixer mainly consists of a frame, a tank, a motor, a feeding mechanism, a discharging mechanism and a stirring mechanism. First, cement, aggregate, water and other additives are added to the tank in the order of the established proportion. Then, the motor is controlled to operate, driving the rotating shaft and the blades installed on the rotating shaft to rotate, fully mixing the raw materials in the tank to ensure that the produced concrete meets the specific performance requirements. Finally, the discharging mechanism is controlled to open the discharge channel to discharge the uniformly mixed concrete from the tank to meet the needs of concrete production and processing.
[0003] In the production process of the concrete mixer, uniform stirring is the core requirement. However, for single-shaft mixers, the single stirring method leads to problems such as concrete easily sticking to the shaft and slow concrete flow and circulation speed, which seriously affects the operation quality and efficiency of the mixing equipment. Specifically, when the single-shaft mixer is in operation, the simple rotation of the stirring shaft makes it easy for concrete to form clumps around the shaft during stirring. In addition, the slow flow and circulation speed of the concrete in the single-shaft mixer not only reduces production efficiency, but also may cause uneven mixing of the concrete, thereby affecting the quality of the final concrete. For mixers using two parallel spiral blades, although the double spiral blades speed up the flow of concrete to some extent, the gap between the two spiral blades may cause incomplete stirring, especially in the corners and edges of the tank, which easily forms a stirring blind area. At the same time, due to the structural characteristics of the double spiral blades, they have limited effect in scraping off the concrete adhering to the tank wall. Therefore, there is room for improvement in the practical application of the concrete mixer to improve the stirring effect of the concrete and facilitate the scraping of the concrete adhering to the inner wall of the tank, thereby better meeting the needs of concrete processing. SUMMARY
[0004] To overcome the defects in the prior art, the utility model provides a concrete mixer that facilitates the scraping of the concrete adhering to the tank wall and improves the stirring effect of the concrete.
[0005] The utility model discloses a technical scheme for a concrete mixer, comprising a rack, a mixing tank arranged on the rack, a mixing shaft rotatably arranged in the mixing tank, and a motor for driving the mixing shaft to rotate, two supports are rotatably arranged on the mixing shaft, the two supports are respectively mounted on the two sides of the rack, two sleeves are arranged between the two supports, the two sleeves are movably sleeved on the two sides of the mixing shaft, a fixing seat is rotatably arranged on each of the two sleeves, the fixing seat is mounted on the mixing tank, a helical blade is arranged between the two sleeves, the outer side of the helical blade is in contact with the inner wall of the mixing tank, the two ends of the helical blade are connected with the two sleeves, a plurality of stirring blades are arranged between the two sleeves, the plurality of stirring blades are evenly mounted on the mixing shaft, a transmission mechanism is arranged between the sleeve close to the motor and the motor.
[0006] Preferably, the mixing tank adopts a tank structure with an open top, the top of the mixing tank is provided with a cover plate, the cover plate is provided with a feeding hopper, the bottom end of the feeding hopper is mounted on the cover plate, the diameter of the middle part of the feeding hopper gradually increases away from the cover plate, a guide cover with an open bottom is arranged in the feeding hopper, the guide cover adopts a conical structure, the diameter of the guide cover gradually increases from the feeding hopper to the cover plate, the cover plate is provided with a plurality of connecting blocks, the plurality of connecting blocks are evenly arranged on the outer wall of the guide cover along the circumferential direction of the guide cover, and the two ends of the connecting blocks are respectively mounted on the cover plate and the feeding hopper.
[0007] Preferably, the top of the mixing tank is provided with two gland nuts, the two gland nuts are respectively arranged on the two sides of the cover plate, the open end of the mixing tank is sealed by the two gland nuts and the cover plate, one side of the two gland nuts and the cover plate is respectively hinged to the top end of the mixing tank, the side surface of the cover plate on both sides adopts an inclined surface, the length of the cover plate gradually decreases away from the mixing tank, the side surface of the gland nut close to the cover plate adopts an inclined surface, the length of the gland nut gradually increases away from the mixing tank, and the side surface of the gland nut close to the cover plate is in contact with the side surface of the cover plate.
[0008] Preferably, one side of each of the two gland nuts away from the cover plate is provided with a pneumatic cylinder, the bottom of the pneumatic cylinder is hinged to the mixing tank, and a fixing piece is hinged to the top of the pneumatic cylinder, and the fixing piece is mounted on the top surface of the gland nut.
[0009] Preferably, the motor and the frame are provided with a support frame, the two sides of the support frame are mounted on the frame and the motor respectively, the fixed plate and the frame are provided with a fixed frame, the two sides of the fixed frame are mounted on the frame and the fixed plate respectively, the top of the fixed frame is provided with a fixed box with one side opening, the opening end of the fixed box is mounted on the fixed plate, and the first bevel gear and the second bevel gear are located in the fixed box.
[0010] Preferably, the bottom of the stirring tank is provided with a valve and a discharge pipe in sequence in the direction away from the stirring tank, the discharge pipe is connected with the stirring tank through the valve, the two sides of the valve are mounted on the discharge pipe and the stirring tank respectively, the discharge pipe is provided with a protective cover, and the diameter of the protective cover gradually increases in the direction away from the stirring tank.
[0011] Preferably, the end of the stirring blade away from the stirring shaft is provided with an auxiliary blade in an inclined manner, the inner side of the middle part of the auxiliary blade is mounted on the stirring blade, and the outer side of the auxiliary blade is in contact with the inner side of the spiral blade; the number of the spiral blades is not less than two, and the plurality of spiral blades are uniformly arranged between the two sleeves, the sleeve is provided with a connecting rod, and the two ends of the connecting rod are mounted on the spiral blade and the sleeve respectively.
[0012] The utility model has the advantages that: firstly, the utility model is provided with the support and the fixing base, the stirring shaft is rotatably assembled on the frame, and the sleeve is rotatably assembled on the stirring tank. The sleeve is movably sleeved on the stirring shaft, so that the spiral blade and the stirring blade can be controlled to perform stirring operation respectively. The axes of the spiral blade and the stirring blade are controlled to be on the same axis, and the utility model significantly reduces the stirring blind area compared with the double spiral blade. Moreover, the utility model is provided with the first gear and the two second gears, which reversely transmit the rotation of the stirring shaft to the sleeve, so that the spiral blade and the stirring blade can be synchronously driven to rotate in opposite directions, thereby improving the stirring effect. Furthermore, the bottom of the stirring tank is provided with a semicircular structure, and the spiral blade is in contact with the stirring tank, so that the spiral blade can scrape the bottom of the stirring tank, thereby facilitating the scraping of the concrete adsorbed on the inner wall of the stirring tank, improving the uniformity of the stirring, and ensuring the quality of the concrete production.
[0013] Secondly, the utility model discloses a middle part diameter of feeding hopper gradually enlarges along the direction of far away from the cover plate, conveniently guide raw material to be transported into the feeding hopper, to transport raw material into the stirring jar to stir, the guiding cover is set up, to guide and buffer the raw material transported in the feeding hopper, to reduce the generation of dust, and the utility model discloses a cover plate both sides are provided with gland, to close the opening end of stirring jar, to avoid the dust generated in the stirring jar from the opening end of stirring jar or the concrete stirred in the stirring jar from the opening end of stirring jar, and the both sides of cover plate are positioned respectively by two glands, to improve the firmness of cover plate assembly, and the utility model discloses the cylinder, can drive the gland to rotate around the hinge of gland and stirring jar, to control the opening or closing of gland.
[0014] Thirdly, the utility model discloses a support frame and fixed frame are set up to assemble motor and fixed plate to the frame, and the first bevel gear and second bevel gear are protected through the fixed box of setting, and the utility model discloses the valve between discharge pipe and stirring jar is set up, to conveniently control the opening or closing of discharge pipe, and the protective cover is assembled on the discharge pipe to prevent the concrete discharged from the discharge pipe from splashing on the valve or stirring jar. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the first three-dimensional schematic diagram of the utility model.
[0016] Figure 2 It is the second three-dimensional schematic diagram of the utility model.
[0017] Figure 3 It is the structure schematic diagram of the utility model.
[0018] Figure 4 It is Figure 3 It is the enlarged diagram of A in the middle.
[0019] Figure 5 It is Figure 3 It is the enlarged diagram of B in the middle.
[0020] Figure 6 It is the assembly explosion drawing of stirring shaft and sleeve in the utility model.
[0021] Figure 7 It is the assembly explosion drawing of first bevel gear, second bevel gear and fixed plate in the utility model. DETAILED DESCRIPTION
[0022] As Figures 1 to 7As shown, a concrete mixer includes a frame 1, a mixing tank 2 mounted on the frame 1, a mixing shaft 3 rotatably mounted inside the mixing tank 2, and a motor 4 for driving the mixing shaft 3 to rotate. Two supports rotatably mount the mixing shaft 3, with the two supports 5 respectively installed on both sides of the frame 1. Two sleeves 6 are positioned between the two supports 5, and the two sleeves 6 are movably fitted onto both sides of the mixing shaft 3. Fixed seats 7 are rotatably mounted on each of the two sleeves 6, and the fixed seats 7 are mounted on the mixing tank 2. A spiral blade 8 is positioned between the two sleeves 6, with the outer side of the spiral blade 8 contacting the inner wall of the mixing tank 2, and both ends of the spiral blade 8 connected to the two sleeves 6. The bottom of the mixing tank 2 has a semi-circular structure. The center lines of the bottom of the mixing tank 2, the spiral blade 8, the sleeves 6, and the mixing shaft 3 are all located on the same axis. Several mixing blades 9 are positioned between the two sleeves 6. A number of mixing blades 9 are evenly installed on the mixing shaft 3. A transmission mechanism is provided between the sleeve 6 near the motor 4 and the motor 4. The transmission mechanism includes a fixed plate 10 on the frame 1, a fixed shaft 11 on the fixed plate 10, a first bevel gear 12 rotatably mounted on the fixed shaft 11, and two second bevel gears 13 meshing on the first bevel gear 12. The two second bevel gears 13 are respectively fixedly mounted on the sleeve 6 and the mixing shaft 3. The transmission is carried out through the first bevel gear 12 and the two second bevel gears 13, so that the mixing shaft 3 drives the sleeve 6 to rotate in the opposite direction, thereby controlling the mixing blades 9 and the spiral blades 8 to rotate synchronously in opposite directions. Moreover, through the contact between the spiral blades 8 and the inner wall of the mixing tank 2, the concrete adsorbed on the inner wall of the mixing tank 2 can be scraped off, thereby improving the uniformity of concrete mixing in the mixing tank 2 and thus improving the concrete mixing effect.
[0023] In this embodiment, the mixing tank 2 adopts a top-opening tank-shaped structure. A cover plate 14 is provided on the top of the mixing tank 2, and a feed hopper 15 is provided on the cover plate 14. The bottom end of the feed hopper 15 is installed on the cover plate 14. The diameter of the middle part of the feed hopper 15 gradually increases along the direction away from the cover plate 14, so as to facilitate the guidance of raw materials to be transported into the feed hopper 15 for mixing in the mixing tank 2. A guide cover 16 with a bottom opening is provided inside the feed hopper 15. The guide cover 16 adopts a conical structure, and the diameter of the guide cover 16 gradually increases along the direction from the feed hopper 15 to the cover plate 14. A plurality of connecting blocks 17 are provided on the cover plate 14. The plurality of connecting blocks 17 are evenly arranged on the outer wall of the guide cover 16 along the circumference of the guide cover 16. The two ends of the connecting blocks 17 are respectively installed on the cover plate 14 and the feed hopper 15, so as to guide and buffer the raw materials transported in the feed hopper 15 using the guide cover 16 to reduce the generation of dust.
[0024] Specifically, the upper part of the stirring tank 2 is provided with two pressing covers 18, which are respectively arranged on the two sides of the cover plate 14. The opening end of the stirring tank 2 is sealed by the two pressing covers 18 and the cover plate 14, so as to close the opening end of the stirring tank 2, thereby avoiding the dust generated in the stirring tank 2 from leaking out of the opening end of the stirring tank 2 or the concrete stirred in the stirring tank 2 from spilling out of the opening end of the stirring tank 2. One side of each of the two pressing covers 18 and the cover plate 14 is hingedly connected to the top end of the stirring tank 2. The side surface of each of the two sides of the cover plate 14 is inclined. The length of the cover plate 14 gradually decreases away from the stirring tank 2. The side surface of the side of each of the two pressing covers 18 close to the cover plate 14 is inclined. The length of each of the two pressing covers 18 gradually increases away from the stirring tank 2. The side surface of the side of each of the two pressing covers 18 close to the cover plate 14 is in contact with the side surface of the cover plate 14. Therefore, the two pressing covers 18 are used to limit the two sides of the cover plate 14, so as to improve the firmness of the cover plate 14. Before the cover plate 14 is opened, the pressing covers 18 need to be opened.
[0025] Please refer to Figures 1-3 , the side of each of the two pressing covers 18 away from the cover plate 14 is provided with a pneumatic cylinder 19. The bottom of the pneumatic cylinder 19 is hingedly connected to the stirring tank 2. The top of the pneumatic cylinder 19 is hingedly connected with a fixing piece 20, which is installed on the top surface of the pressing cover 18. Therefore, by controlling the extension and retraction of the pneumatic cylinder 19, the pressing cover 18 can be driven to rotate around the hinge between the pressing cover 18 and the stirring tank 2, so as to control the opening and closing of the pressing cover 18.
[0026] In the embodiment, a support frame 21 is arranged between the motor 4 and the rack 1. The two sides of the support frame 21 are respectively installed on the rack 1 and the motor 4. A fixing frame 22 is arranged between the fixing plate 10 and the rack 1. The two sides of the fixing frame 22 are respectively installed on the rack 1 and the fixing plate 10, so as to assemble the motor 4 and the fixing plate 10 to the rack 1. An open-sided fixing box 23 is arranged above the fixing frame 22. The opening end of the fixing box 23 is installed on the fixing plate 10. The first bevel gear 12 and the second bevel gear 13 are located in the fixing box 23. A sleeve hole is formed in the fixing box 23, which movably sleeves the sleeve 6 or the stirring shaft 3, so as to protect the first bevel gear 12 and the second bevel gear 13.
[0027] Please refer to Figure 2 and 3The lower part of the stirring tank 2 is sequentially provided with a valve 24 and a discharge pipe 25 in the direction away from the stirring tank 2, the discharge pipe 25 is communicated with the stirring tank 2 through the valve 24, the valve 24 is installed on the discharge pipe 25 and the stirring tank 2 respectively, so that the opening or closing of the discharge pipe 25 is controlled through the valve 24, the protective cover 26 is sleeved on the discharge pipe 25, the diameter of the protective cover 26 gradually increases in the direction away from the stirring tank 2, so as to prevent the concrete discharged from the discharge pipe 25 from splashing on the valve 24 or the stirring tank 2.
[0028] Please refer again to Figure 6 The end of the stirring blade 9 away from the stirring shaft 3 is provided with an auxiliary blade 27, the inner side of the auxiliary blade 27 is installed on the stirring blade 9, and the outer side of the auxiliary blade 27 is in contact with the inner side of the spiral blade 8; the number of the spiral blade 8 is not less than two, and the plurality of spiral blades 8 are evenly arranged between the two sleeves 6, the connecting rod 28 is arranged on the sleeve 6, and the two ends of the connecting rod 28 are installed on the spiral blade 8 and the sleeve 6 respectively, so as to improve the stirring effect of the utility model.
[0029] The use method of the product is as follows: as shown in Figures 1 to 7 Firstly, the cement, aggregate, water and other additives are sequentially added into the feeding hopper 15 according to the predetermined proportion, the raw materials are buffered and guided through the guide cover 16, so that the cement, aggregate, water and other additives are sequentially added into the stirring tank 2 according to the predetermined proportion. Then the motor 4 is started to drive the stirring shaft 3, the stirring blade 9 and the auxiliary blade 27 to rotate, at the same time, the sleeve 6 and the spiral blade 8 are driven to rotate in the opposite direction through the first bevel gear 12 and the second bevel gear 13, so as to rotate the raw materials in the stirring tank 2, thereby mixing the uniform concrete. Finally, the valve 24 is opened to control the uniform concrete mixed in the stirring tank 2 to be discharged along the discharge pipe 25, so as to meet the needs of continuous supply of the concrete.
[0030] Through the support 5 and the fixing base 7, the stirring shaft 3 is rotatably assembled to the frame 1, and the sleeve 6 is rotatably assembled to the stirring tank 2. The sleeve 6 is movably sleeved on the stirring shaft 3, so that the helical blade 8 and the stirring blade 9 are controlled to perform stirring operations, respectively. The axes of the helical blade 8 and the stirring blade 9 are controlled to be on the same axis. Compared with the double helical blade, the stirring blind area is significantly reduced. Moreover, the first gear 12 and the two second gears 13 are arranged, and the rotation of the stirring shaft 3 is reversely transmitted to the sleeve 6, so that the helical blade 8 and the stirring blade 9 are conveniently driven to rotate in opposite directions, and the stirring effect is improved. Furthermore, the bottom of the stirring tank 2 is in a semicircular structure, and the helical blade 8 is in contact with the stirring tank 2, so that the helical blade 8 can scrape the bottom of the stirring tank 2, thereby conveniently scraping the concrete adsorbed on the inner wall of the stirring tank 2, so as to improve the uniformity of stirring and ensure the quality of concrete production.
[0031] The above-mentioned embodiments are only preferred embodiments of the utility model, and are not limited to the scope of the utility model. Any equivalent changes or modifications made according to the structure, features and principles of the utility model patent range should be included in the patent range of the utility model.
Claims
1. A concrete mixer, comprising a frame (1), a mixing tank (2) mounted on the frame (1), a mixing shaft (3) rotatably mounted inside the mixing tank (2), and a motor (4) for driving the mixing shaft (3) to rotate, characterized in that: Two supports (5) are rotatably mounted on the stirring shaft (3). The two supports (5) are respectively installed on both sides of the frame (1). Two sleeves (6) are arranged between the two supports (5). The two sleeves (6) are respectively movably mounted on both sides of the stirring shaft (3). Fixed seats (7) are rotatably mounted on the two sleeves (6). Fixed seats (7) are installed on the stirring tank (2). Spiral blades (8) are arranged between the two sleeves (6). The outer side of the spiral blades (8) is in contact with the inner wall of the stirring tank (2). The two ends of the spiral blades (8) are connected to the two sleeves (6). Several stirring blades (9) are arranged between the two sleeves (6). Several stirring blades (9) are evenly mounted on the stirring shaft (3). A transmission mechanism is arranged between the sleeve (6) near the motor (4) and the motor (4). The transmission mechanism includes a fixed plate (10) on the frame (1), a fixed shaft (11) on the fixed plate (10), a first bevel gear (12) rotatably mounted on the fixed shaft (11), and two second bevel gears (13) meshing on the first bevel gear (12). The two second bevel gears (13) are respectively fixedly mounted on the sleeve (6) and the stirring shaft (3).
2. The concrete mixer according to claim 1, characterized in that: The mixing tank (2) adopts a tank-shaped structure with an open top. A cover plate (14) is provided on the top of the mixing tank (2). A feed hopper (15) is provided on the cover plate (14). The bottom end of the feed hopper (15) is installed on the cover plate (14). The diameter of the middle part of the feed hopper (15) gradually increases along the direction away from the cover plate (14). A guide cover (16) with an open bottom is provided inside the feed hopper (15). The guide cover (16) adopts a conical structure. The diameter of the guide cover (16) gradually increases along the direction from the feed hopper (15) to the cover plate (14). Several connecting blocks (17) are provided on the cover plate (14). Several connecting blocks (17) are evenly arranged on the outer wall of the guide cover (16) along the circumference of the guide cover (16). The two ends of the connecting blocks (17) are respectively installed on the cover plate (14) and the feed hopper (15).
3. The concrete mixer according to claim 2, characterized in that: The mixing tank (2) is provided with two pressure caps (18) on the top. The two pressure caps are respectively located on both sides of the cover plate (14). The opening end of the mixing tank (2) is sealed by the two pressure caps (18) and the cover plate (14). One side of the two pressure caps (18) and the cover plate (14) is respectively hinged to the top of the mixing tank (2) by hinges. Both sides of the cover plate (14) are inclined surfaces. The length of the cover plate (14) gradually decreases along the direction away from the mixing tank (2). The side of the pressure cap (18) near the cover plate (14) is inclined surface. The length of the pressure cap (18) gradually increases along the direction away from the mixing tank (2). The side of the pressure cap (18) near the cover plate (14) is in contact with the side of the cover plate (14).
4. The concrete mixer according to claim 3, characterized in that: The two pressure caps (18) are respectively provided with cylinders (19) on the side away from the cover plate (14). The bottom of the cylinder (19) is hinged to the mixing tank (2), and the top of the cylinder (19) is hinged to a fixing member (20). The fixing member (20) is installed on the top surface of the pressure cap (18).
5. The concrete mixer according to claim 1, characterized in that: A support frame (21) is provided between the motor (4) and the frame (1). The two sides of the support frame (21) are respectively installed on the frame (1) and the motor (4). A fixing frame (22) is provided between the fixing plate (10) and the frame (1). The two sides of the fixing frame (22) are respectively installed on the frame (1) and the fixing plate (10). A fixing box (23) with an opening on one side is provided above the fixing frame (22). The opening end of the fixing box (23) is installed on the fixing plate (10). The first bevel gear (12) and the second bevel gear (13) are both located inside the fixing box (23). A sleeve hole is opened on the fixing box (23). The sleeve hole is movably fitted onto the sleeve (6) or the stirring shaft (3).
6. The concrete mixer according to claim 1, characterized in that: Below the mixing tank (2), a valve (24) and a discharge pipe (25) are arranged sequentially along the direction away from the mixing tank (2). The discharge pipe (25) is connected to the mixing tank (2) through the valve (24). The two sides of the valve (24) are respectively installed on the discharge pipe (25) and the mixing tank (2). A protective cover (26) is fitted on the discharge pipe (25). The diameter of the protective cover (26) gradually increases along the direction away from the mixing tank (2).
7. The concrete mixer according to claim 1, characterized in that: An auxiliary blade (27) is inclinedly provided at one end of the stirring blade (9) away from the stirring shaft (3). The inner middle part of the auxiliary blade (27) is installed on the stirring blade (9), and the outer side of the auxiliary blade (27) is in contact with the inner side of the spiral blade (8). The number of spiral blades (8) is not less than two, and several spiral blades (8) are evenly arranged between two sleeves (6). A connecting rod (28) is provided on the sleeve (6), and the two ends of the connecting rod (28) are respectively installed on the spiral blade (8) and the sleeve (6).