Concrete mixing head and concrete mixing device

Abstract

The invention discloses a concrete mixing head and a concrete mixing device. The mixing head comprises a mixing shaft, a tool assembly, and a plurality of mixing bodies. The tool assembly comprises a tool body. The number of the tool bodies is multiple and the multiple tool bodies are evenly distributed on the outer peripheral wall of the mixing shaft. The multiple mixing bodies are arranged in a ring-shaped manner and spaced apart on the outer periphery of the multiple tool bodies with the axis of the mixing shaft as the center. The mixing body is provided with a first connecting end and a second connecting end. The first connecting end and the second connecting end are respectively fixedly connected to the outer peripheral wall of the mixing shaft. The multiple tool bodies are arranged between the first connecting end and the second connecting end. The concrete mixing device drives the mixing shaft to rotate around its axis through a mixing driving mechanism, so that the mixing body and the tool body can rotate synchronously. Concrete will pass through the mixing gap between the mixing body and the tool body. At this time, the multiple tool bodies continuously cut the concrete surface in the mixing gap, and bubbles in the concrete can be eliminated simultaneously during mixing.

Description

Technical Field

[0001] The invention relates to the field of concrete mixing equipment, in particular to a concrete mixing head and a concrete mixing device. Background Art

[0002] In construction, concrete is an indispensable material. In the process of concrete manufacturing, mixing equipment is needed to mix the required materials in various proportions through mixing equipment to form the required concrete. Traditional mixing equipment only has the function of mixing. In the implementation process, the mixing head on the traditional mixing equipment has a small mixing volume, and generally multiple mixing heads are required for mixing, which greatly increases the cost and complexity of the equipment.

[0003] At the same time, a kind of ultra-high performance concrete (such as the concrete disclosed in Chinese patent CN201811609452.4) has appeared on the market, which has ultra-high mechanical properties and excellent durability, and overcomes many shortcomings of traditional concrete, such as low strength, poor durability, easy cracking, etc. However, ultra-high performance concrete is not widely used in actual construction at present, and there are still many technical difficulties. One of the most important problems is that the ultra-high performance concrete prepared at the construction site contains too much air. The presence of bubbles will undoubtedly greatly reduce the strength and rigidity of ultra-high performance concrete, and also affect the appearance and intrinsic quality of the building. The prior art generally reduces bubbles by adding defoamers during mixing, but the uncertainty of the size range of small bubbles produced reduces its effect on the strength of ultra-high performance concrete, and because the amount of concrete used in construction projects is large, adding too much defoamer will affect the chemical composition of ultra-high performance concrete, and have potential harm to its strength and durability; the prior art also uses a vibrating table to vibrate concrete to discharge bubbles, but the amount of concrete in actual projects is large, it is inconvenient to vibrate, and the efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete mixing head and a concrete mixing device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] First, the present invention provides a concrete mixing head, comprising: a mixing shaft, a tool assembly, and a mixing body, wherein the mixing shaft is provided with a central axis coaxially arranged therewith, the tool assembly comprises a tool body, wherein the number of the tool bodies is multiple, and the multiple tool bodies are evenly distributed on the outer peripheral wall of the mixing shaft; the number of the mixing bodies is multiple, and the multiple mixing bodies are arranged in a ring-shaped manner and spaced apart on the outer periphery of the multiple tool bodies with the axis of the mixing shaft as the center of the circle, the mixing body is provided with a first connecting end and a second connecting end, the first connecting end and the second connecting end are spaced apart along the axial direction of the mixing shaft, the first connecting end and the second connecting end are respectively fixedly connected to the outer peripheral wall of the mixing shaft, the multiple tool bodies are arranged between the first connecting end and the second connecting end, and a mixing gap is provided between the mixing body and the tool body.

[0007] The beneficial effects of the present invention are as follows: when in use, by driving the stirring shaft to rotate around its axis, the stirring body and the blade body on the stirring shaft are driven to rotate synchronously. In the process of multiple stirring bodies stirring concrete, the concrete will pass through the stirring gap between the stirring body and the blade body. At this time, the multiple blade bodies can continuously cut the concrete surface in the stirring gap. When stirring ultra-high performance concrete, the bubbles in the ultra-high performance concrete can be cut, and the bubbles in the concrete can be eliminated at the same time during stirring, which simplifies the construction steps and saves time; when stirring ordinary concrete, under the action of multiple stirring bodies and multiple blade bodies, the stirring amount can be increased, the number of stirring heads in the stirring equipment can be reduced, the parts of the stirring equipment are reduced, and the manufacturing cost and complexity of the stirring equipment are reduced.

[0008] As a further improvement of the above technical solution, the stirring body is bent in an arc shape along the axial direction of the stirring shaft, and the centroid of the stirring shaft faces the central axis of the stirring shaft.

[0009] Since the distance between the stirring body and the stirring shaft gradually decreases from the middle of the stirring body to the two ends of the stirring body, that is, the gap between the stirring body and the stirring shaft surface gradually decreases from the middle of the stirring body to the two ends of the stirring body, during stirring, the concrete can be moved from the two ends of the stirring body to the middle of the stirring body, so that the blade body can better cut the concrete and improve the efficiency of cutting bubbles. In addition, the resistance of the concrete to each part of the stirring body is different, and the resistance to the stirring body decreases from the middle to the two ends, thereby reducing the driving force on the stirring shaft and achieving energy-saving effect.

[0010] As a further improvement of the above technical solution, the cutter body is provided with a blade, and the blade rotates in the same direction as the stirring shaft.

[0011] The so-called same direction mainly refers to the same trend. For example, when the agitator shaft is installed on the machine, it is driven to rotate clockwise in the relative left and right directions. Then the blade is located on the clockwise side of the blade body relative to the blade body. The blade can be a straight line, a sideways oblique line, an arched line or other curves, as long as the trend is roughly the same as the direction of rotation of the agitator shaft. The purpose of this setting is to allow the blade body to cut the concrete during the rotation of the agitator shaft, thereby cutting small bubbles in the concrete, improving the effect of eliminating bubbles, and also reducing the force generated between the blade body and the concrete, that is, the resistance of the concrete to the blade body, further reducing the driving force required to drive the agitator shaft to rotate.

[0012] As a further improvement of the above technical solution, the cutter body is a blade structure, and the blade structure is perpendicular to the axis of the stirring shaft. The multiple cutter bodies are divided into multiple rows of cutter bodies, and the multiple rows of cutter bodies are arranged in a ring-shaped manner with the axis of the stirring shaft as the center. Each row of cutter bodies includes several cutter bodies, and the several cutter bodies are arranged at intervals along the axis of the stirring shaft.

[0013] The blade structure is arranged perpendicularly to the axis of the mixing shaft, which can reduce the resistance between the concrete and the multiple blade bodies, and can also increase the number of blade bodies to improve the efficiency of concrete cutting. In addition, multiple rows of blade bodies can not only cut the concrete passing through the mixing gap, but also cut the concrete passing between two adjacent mixing bodies.

[0014] As a further improvement of the above technical solution, the tool assembly also includes a sleeve, which is fixedly mounted on the outer peripheral wall of the stirring shaft between the first connecting end and the second connecting end, and an installation groove is arranged on the sleeve. There are multiple installation grooves, and the multiple tool bodies are installed one by one on the multiple installation grooves.

[0015] When in use, the blade body is fixedly installed through the sleeve. Specifically, the blade body can be fixedly installed on the installation groove, so that the arrangement and number of the blade bodies can be adjusted according to needs, and it is suitable for different types of concrete, making the application range wide. Because some concrete does not need to be defoamed, the blade body is not needed for cutting.

[0016] In addition, the present invention also provides a concrete mixing device, which includes a mixing drive mechanism and the concrete mixing head, wherein the mixing shaft is transmission-connected to the mixing drive mechanism, and the mixing drive mechanism can drive the mixing shaft to rotate around a central axis.

[0017] When in use, the stirring shaft is driven to rotate by the stirring driving mechanism, and the stirring driving mechanism can be portable or fixed, so that the concrete mixing device can have two forms, namely, a portable and a fixed stirring device.

[0018] As a further improvement of the above technical solution, the concrete mixing device also includes a mixing container and a vacuum pumping device. The mixing container is provided with a closed mixing chamber. The concrete mixing head is arranged in the closed chamber. The vacuum pumping device is connected to the mixing chamber.

[0019] When in use, concrete is placed in a closed chamber, and while the concrete is being mixed and cut by the above-mentioned concrete mixing head, the vacuum device extracts the air in the closed chamber. While cutting the bubbles, it also promotes the discharge of bubbles from the concrete slurry and inhibits the re-generation of bubbles, which can effectively eliminate large and small bubbles in the concrete. The combination of cutting bubbles with the blade body and vacuum extraction of bubbles can quickly and efficiently discharge bubbles from the concrete slurry, making the concrete more compact and improving the strength and durability of the concrete to a certain extent; it replaces the currently commonly used method of adding defoaming agents, reduces environmental pollution, saves costs, and is conducive to the development of green projects.

[0020] As a further improvement of the above technical solution, the vacuum extraction equipment includes a vacuum pump, and a connecting piece is arranged between the vacuum pump and the stirring chamber, and the connecting piece is provided with a first connecting port, a second connecting port, a third connecting port, and a fourth connecting port which are interconnected, the first connecting port is connected to the vacuum pump, the second connecting port is connected to the stirring chamber, the third connecting port is connected to a pressure gauge, and the fourth connecting port is connected to a pressure relief valve.

[0021] During vacuuming, the mixing chamber is evacuated by a vacuum pump, and the air pressure inside the mixing chamber is monitored by a pressure gauge. After the concrete is mixed and defoamed, the pressure relief valve is opened to balance the air pressure in the mixing chamber with that outside before pouring out the concrete.

[0022] As a further improvement of the above technical solution, the mixing container includes a mixing barrel and a barrel cover, the mixing barrel is provided with an upward barrel mouth, the barrel cover is sealed on the barrel mouth, so that the mixing barrel and the barrel cover constitute the mixing chamber; the concrete mixing device also includes a frame, the side wall of the mixing barrel is rotatably mounted on the frame through a rotating member, and the rotation axis of the rotating member is horizontally arranged.

[0023] When pouring out the concrete, the barrel cover is opened and the mixing barrel is driven to rotate around the rotating member, so that the concrete in the mixing barrel is poured out from the barrel mouth, which is convenient for workers to operate.

[0024] As a further improvement of the above technical solution, the concrete mixing head is arranged in a mixing barrel, two rotating members are provided, and the two rotating members are respectively installed on the opposite side walls of the mixing barrel, the two rotating members are coaxially arranged, the mixing shaft is coaxially arranged with the rotation axis of the rotating member, the two ends of the mixing shaft are respectively rotatably connected to the rotating members, and the mixing drive mechanism includes a mixing motor installed on the frame, and the mixing motor is drivingly connected to one end of the mixing shaft.

[0025] When mixing, the mixing shaft is driven to rotate by the mixing motor. When pouring concrete, the swing mixing barrel rotates around the two rotating parts, and the mixing barrel also swings around the axis of the mixing shaft, thereby reducing the force required to swing the mixing barrel and reducing the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0027] Figure 1 This is a structural schematic diagram of an embodiment of a concrete mixing device provided by the present invention;

[0028] Figure 2 The present invention provides a concrete mixing head, and a schematic structural diagram of an embodiment thereof. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figure 2 The concrete mixing head of the present invention is made into the following embodiments:

[0034] The concrete mixing head of this embodiment includes a mixing shaft 100, a tool assembly, and three mixing bodies 300, wherein the tool assembly includes a sleeve 700 and a plurality of tool bodies 200, wherein the sleeve 700 is fixedly sleeved on the outer peripheral wall of the mixing shaft 100, and a plurality of mounting grooves are provided on the sleeve 700, and the tool bodies 200 are mounted on the mounting grooves one by one. During assembly, the tool bodies 200 can be fixedly mounted on the mounting grooves (not shown in the figure), and the arrangement and quantity of the tool bodies 200 can be adjusted according to needs, so as to be applicable to different types of concrete and have a wide range of applications.

[0035] The three stirring bodies 300 are arranged in a circular manner with the axis of the stirring shaft 100 as the center and are arranged at intervals on the outer periphery of the multiple blade bodies 200. The stirring bodies 300 are arranged in an arc shape along the axial direction of the stirring shaft 100, and the centroid of the stirring shaft 100 faces the axis of the stirring shaft 100. The stirring body 300 is provided with a first connecting end 310 and a second connecting end 320. The first connecting end 310 and the second connecting end 320 are arranged at intervals along the axial direction of the stirring shaft 100. The first connecting end 310 and the second connecting end 320 are respectively fixedly connected to the outer peripheral wall of the stirring shaft 100. The multiple blade bodies 200 are arranged between the first connecting end 310 and the second connecting end 320, that is, the first connecting end 310 and the second connecting end 320 are respectively arranged on the outside of the two ends of the sleeve 700, and a stirring gap is provided between the main body of the stirring body 300 and the blade body 200.

[0036] When the stirring shaft 100 is driven to rotate around its axis, the stirring body 300 and the cutter body 200 on the stirring shaft 100 can be driven to rotate synchronously. In the process of multiple stirring bodies 300 stirring concrete, the concrete will pass through the stirring gap between the stirring body 300 and the cutter body 200, and pass through two adjacent stirring bodies 300. At this time, the cutter body 200 continuously cuts the concrete passing through the stirring gap and between two adjacent stirring bodies 300, so as to cut the bubbles in the concrete. The bubbles in the concrete can be eliminated at the same time during the stirring, which simplifies the construction steps, saves time, and improves the effect of eliminating bubbles.

[0037] In addition, the blade body 200 of this embodiment is a blade structure, which is perpendicular to the axis of the stirring shaft 100. The blade body 200 is provided with a blade 210, and the blade (210) rotates in the same direction as the stirring shaft (100). The blade body 200 cuts the concrete through the blade 210, thereby cutting small bubbles in the concrete, and also reducing the resistance formed between the blade body 200 and the concrete, reducing the driving force required to drive the stirring shaft 100 to rotate, thereby achieving an energy-saving effect.

[0038] In other embodiments, more than three blade bodies 200 may be provided.

[0039] In some other implementations, the cutter body 200 may be other structures, such as a bendable blade structure, and it is bent along the circumference of the stirring shaft 100 to cut concrete.

[0040] In this embodiment, the plurality of blade bodies 200 are divided into a plurality of rows of blade bodies 200, and the plurality of rows of blade bodies 200 are arranged in a circular manner with the axis of the stirring shaft 100 as the center. Each row of blade bodies 200 includes a plurality of blade bodies 200, and the plurality of blade bodies 200 are arranged in a spaced manner along the axis of the stirring shaft 100, which can expand the cutting range of the stirring head. In other embodiments, the arrangement of the blade bodies 200 can be in other forms, and the blade bodies 200 between each row can be staggered to improve the cutting efficiency.

[0041] In some embodiments, the stirring body 300 may have various shapes, as long as a stirring gap is formed between the stirring body 300 and the blade body 200 .

[0042] At the same time, if Figure 1 As shown, this embodiment further provides a concrete mixing device, which includes a mixing drive mechanism and the above-mentioned concrete mixing head, and the mixing drive mechanism is drivingly connected to the mixing shaft 100.

[0043] In some embodiments, the stirring drive mechanism may be portable or fixed, so that the concrete mixing device may have two forms, namely a portable and a fixed stirring device, and the stirring drive mechanism may drive the stirring shaft (100) to rotate around the central axis.

[0044] The concrete mixing device of this embodiment also includes a mixing container 400 and a vacuum pump 500. The mixing container 400 is provided with a sealed mixing chamber 800. The vacuum end of the vacuum pump 500 is connected to the mixing chamber 800, and the concrete mixing head is arranged in the sealed chamber. While mixing and cutting, the mixing chamber 800 is evacuated by the vacuum pump 500, so as to promote the discharge of bubbles from the concrete slurry and inhibit the re-generation of bubbles, which can effectively eliminate large and small bubbles in the concrete and improve the efficiency of eliminating bubbles. The combination of cutting bubbles with the cutter body 200 and vacuum extraction of bubbles can quickly and efficiently discharge bubbles in the concrete slurry, make the concrete more compact, and improve the strength and durability of the concrete to a certain extent. Compared with the traditional method of eliminating bubbles, it overcomes the uncertainty of the size range of small bubbles produced by adding defoaming agents to reduce large bubbles, and will not affect the chemical composition of concrete, thereby reducing its influence on the strength of concrete; compared with vibrating and discharging bubbles after mixing, it simplifies the construction steps, saves time, and is more flexible and convenient to move.

[0045] Further, the mixing container 400 includes a mixing barrel 410 and a barrel cover 420, the mixing barrel 410 is provided with an upward barrel mouth, and the barrel cover 420 is sealed on the barrel mouth, so that the mixing barrel 410 and the barrel cover 420 constitute the mixing chamber 800, the concrete mixing device also includes a frame 600, and rotating members 411 are installed on the opposite side walls of the mixing barrel 410, the two rotating members 411 are coaxially arranged, and the rotation axis of the rotating member 411 is horizontally arranged, the mixing shaft 100 is coaxially arranged with the rotation axis of the rotating member 411, and the two ends of the mixing shaft 100 are respectively rotatably connected to the rotating member 411, and the mixing drive mechanism includes a mixing motor (not shown) installed on the frame 600, and the side wall of the mixing barrel 410 is rotatably installed on the frame 600 through the rotating member 411, and the mixing motor is drivingly connected to one end of the mixing shaft 100. When the mixing is completed, the barrel cover 420 is opened, and the mixing barrel 410 is swung to rotate around the two rotating parts 411, so that the concrete in the mixing barrel 410 is poured out from the barrel mouth. At this time, the mixing barrel 410 is also swung around the axis of the mixing shaft 100, so during the pouring operation, the mixing head is not driven to move, thereby reducing the force required to swing the mixing barrel 410 and reducing the labor intensity of the workers.

[0046] Furthermore, after mixing, the air pressure in the mixing chamber 800 is lower than the external air pressure, so it is very laborious to open the barrel cover 420, and sometimes it cannot be opened. Therefore, in this embodiment, a connecting piece 510 is provided between the vacuum pump 500 and the mixing chamber 800, and the connecting piece 510 is provided with a first connecting port 511, a second connecting port 512, a third connecting port 513, and a fourth connecting port 514 that are interconnected. The first connecting port 511 is connected to the vacuum pump 500, the second connecting port 512 is connected to the mixing chamber 800, the third connecting port 513 is connected to a pressure gauge 515, and the fourth connecting port 514 is connected to a pressure relief valve 516. After the concrete is mixed and defoamed, the pressure relief valve 516 is opened, so that the mixing chamber 800 is balanced with the external air pressure, and the barrel cover 420 can be easily opened. At the same time, the air pressure inside the mixing chamber 800 is monitored by the pressure gauge 515. In order to improve the efficiency of defoaming, it is necessary to stay still for a period of time so that the bubbles in the concrete can be sucked out. A regulating valve can be installed between the first connecting port 511 and the vacuum pump 500. After stopping the operation of the vacuum pump 500, the regulating valve can be closed to maintain the vacuum degree in the mixing chamber 800 for a period of time, which can achieve energy-saving effect.

[0047] In this embodiment, a pulley assembly is installed on the rack 600 to facilitate the movement of the device.

[0048] This concrete mixing device integrates the mixing function and the exhaust function into one machine, which greatly facilitates on-site construction, can achieve good construction results, and save costs. It is also suitable for mixing ultra-high performance concrete and other types of concrete.

[0049] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A concrete mixing device, characterized in that: It includes a mixing drive mechanism and a concrete mixing head; Concrete mixing head includes: Stirring shaft (100); A tool assembly, comprising a tool body (200), wherein the tool bodies (200) are multiple in number, and the multiple tool bodies (200) are evenly distributed on the outer peripheral wall of the stirring shaft (100); A stirring body (300), the number of which is plural, the plurality of stirring bodies (300) being arranged in a ring-shaped manner and spaced apart on the periphery of the plurality of blade bodies (200) with the axis of the stirring shaft (100) as the center, the stirring body (300) being provided with a first connecting end (310) and a second connecting end (320), the first connecting end (310) and the second connecting end (320) being spaced apart along the axial direction of the stirring shaft (100), the first connecting end (310) and the second connecting end (320) being respectively fixedly connected to the outer peripheral wall of the stirring shaft (100), the plurality of blade bodies (200) being arranged between the first connecting end (310) and the second connecting end (320), and a stirring gap being provided between the stirring body (300) and the blade body (200); The stirring shaft (100) is in transmission connection with a stirring driving mechanism, and the stirring driving mechanism can drive the stirring shaft (100) to rotate around a central axis; The tool assembly further comprises a sleeve (700), wherein the sleeve (700) is fixedly sleeved on the outer peripheral wall of the stirring shaft (100), and the sleeve (700) is located between the first connecting end (310) and the second connecting end (320). A mounting groove is provided on the sleeve (700), and the number of the mounting grooves is multiple. The multiple tool bodies (200) are mounted on the multiple mounting grooves in a one-to-one correspondence. During assembly, the tool bodies (200) are fixedly mounted on the mounting grooves, and the arrangement and number of the tool bodies (200) can be adjusted according to needs, so as to be suitable for different types of concrete. The concrete mixing device further comprises a mixing container (400) and a vacuum pumping device, the mixing container (400) is provided with a sealed mixing chamber (800), the concrete mixing head is arranged in the sealed chamber, and the vacuum pumping device is connected to the mixing chamber (800); The vacuum extraction device comprises a vacuum pump (500); a connecting piece (510) is provided between the vacuum pump (500) and the mixing chamber (800); the connecting piece (510) is provided with a first connecting port (511), a second connecting port (512), a third connecting port (513), and a fourth connecting port (514) which are interconnected; the first connecting port (511) is connected to the vacuum pump (500); the second connecting port (512) is connected to the mixing chamber (800); the third connecting port (513) is connected to a pressure gauge (515); and the fourth connecting port (514) is connected to a pressure relief valve (516); after the concrete is mixed and defoamed, the pressure relief valve (516) is opened, so that the mixing chamber (800) and the external air pressure are balanced, and then the barrel cover (420) is easily opened, and the air pressure inside the mixing chamber (800) is monitored by the pressure gauge (515); The stirring container (400) comprises a stirring barrel (410) and a barrel cover (420); the stirring barrel (410) is provided with an upward barrel opening, and the barrel cover (420) is sealed on the barrel opening, so that the stirring barrel (410) and the barrel cover (420) form the stirring chamber (800); The concrete mixing device further comprises a frame (600), and the side wall of the mixing barrel (410) is rotatably mounted on the frame (600) via a rotating member (411), wherein the rotating axis of the rotating member (411) is arranged horizontally; The concrete mixing head is arranged in a mixing barrel (410), and two rotating members (411) are arranged. The two rotating members (411) are respectively mounted on opposite side walls of the mixing barrel (410), and the two rotating members (411) are coaxially arranged. The mixing shaft (100) is coaxially arranged with the rotation axis of the rotating member (411), and both ends of the mixing shaft (100) are respectively connected to the rotating member (411) so as to be relatively rotatable. The mixing driving mechanism comprises a mixing motor mounted on a frame (600), and the mixing motor is drivingly connected to one end of the mixing shaft (100). When mixing is completed, the barrel cover (420) is opened, and the mixing barrel (410) is swung to rotate around the two rotating members (411), so that the concrete in the mixing barrel (410) is poured out from the barrel mouth. At this time, the mixing barrel (410) is also swung around the axis of the mixing shaft (100). During the pouring operation, the concrete mixing head is not driven to move, thereby reducing the force required for swinging the mixing barrel (410).

2. A concrete mixing device according to claim 1, characterized in that: The stirring body (300) is arranged in an arc shape along the axial direction of the stirring shaft (100), and the centroid of the stirring shaft (100) faces the central axis of the stirring shaft (100).

3. A concrete mixing device according to claim 1, characterized in that: The blade body (200) is provided with a blade (210), and the blade (210) rotates in the same direction as the stirring shaft (100).

4. A concrete mixing device according to claim 1, characterized in that: The blade body (200) is a blade structure, and the blade structure is perpendicular to the axis of the stirring shaft (100). The plurality of blade bodies (200) are divided into a plurality of rows of blade bodies (200), and the plurality of rows of blade bodies (200) are arranged in a ring-shaped manner with the axis of the stirring shaft (100) as the center. Each row of blade bodies (200) includes a plurality of blade bodies (200), and the plurality of blade bodies (200) are arranged in a spaced manner along the axis of the stirring shaft (100).

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