Continuous concrete stirring device

Abstract

The invention discloses a continuous concrete stirring device which comprises a rack and a composite hopper installed on the rack and used for temporarily storing materials, the composite hopper comprises a feeding port in the upper portion and a discharging port in the lower portion, the discharging port extends downwards to form a stock bin B, and a quantitative feeding mechanism is installed in the stock bin B; the lower part of the quantitative feeding mechanism is communicated with a material mixing barrel which is obliquely arranged and is used for stirring and discharging, a stirring mechanism is arranged in the material mixing barrel, the material mixing barrel is also provided with a water supply mechanism which is communicated with the interior of the material mixing barrel, and the water supply mechanism and the quantitative feeding mechanism are electrically connected with a control mechanism which is arranged on the composite hopper. Concrete is stirred in a continuous operation mode of feeding, stirring and discharging, continuous concrete supply can be provided for a construction site, and the problem that an existing batch stirring mode occupies a large site space is solved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete mixing devices, in particular to the technical field of continuous synchronous concrete mixing devices, and specifically to a continuous concrete mixing device. Background Art

[0002] Concrete is an indispensable main engineering material for engineering construction. When constructing large-scale cast buildings, a large amount of concrete is required. Existing concrete mixing is mostly carried out in batch mixing, that is, using a mixer or a cement mixer truck to mix according to the preset concrete ratio, and after mixing, the concrete is transported to the place where it needs to be poured. The so-called batch mixing means that the existing concrete mixing method is not continuous, that is, before the mixing of the current batch of concrete is completed, the mixing of the next batch of concrete cannot be carried out, and the feeding of the mixing materials and the discharging of the concrete are not consistent and synchronous. For casting projects with large casting volume and high continuity requirements, multiple mixer trucks are required to mix at the same time and cross-feed, so as to ensure the continuous supply of concrete, but this method occupies a lot of space on the construction site, especially when using cement mixing tank trucks for mixing, a special mixing loading tower is required to load the mixing tank truck, and there is a transfer space for the cement mixing tank truck from the loading to the feeding area. Because the space on the construction site is often very limited, there is not enough space for multiple mixing equipment or mixing cement tank trucks to operate and transport.

[0003] The shortcomings of the above two prior arts are mainly reflected in:

[0004] 1. Description of mixer (small drum type): The main problem is that the capacity is limited and the efficiency of handling large volumes of concrete is low. At the same time, it is easy to have inconsistent quality between different batches, which may lead to uneven overall quality of the project.

[0005] 2. Mixer truck: The mixer at the mixing station completes the mixing and is then transported to the pouring construction site by a mixer truck, which takes up a lot of space on the construction site and has low efficiency.

[0006] 3. Large mixer: The mixing capacity overcomes the disadvantage of small mixer, but it also has the disadvantage of needing to be transported by mixer trucks.

[0007] To sum up, although there are different mixing technologies in the existing technology, none of them are continuous operations. They are all carried out by static mixing in batches and then transporting the finished concrete materials. In view of this, there is a need for a device that can continuously mix and supply concrete to reduce the space occupied by the working space and improve the continuity and synchronization of concrete supply. Summary of the invention

[0008] In order to solve the problem of poor continuity caused by batch mixing operations of existing construction site mixing equipment, the present application provides a continuous concrete mixing device, which is used to solve the problem that existing batch mixing equipment or cement mixing tank trucks need to mix in batches when preparing concrete and cannot supply continuously.

[0009] In order to achieve the above purpose, the technical solution adopted in this application is:

[0010] A continuous concrete mixing device comprises a frame, and a composite hopper installed on the frame for temporarily storing materials, the composite hopper comprises an upper feeding port and a lower discharging port, the discharging port extends downward to form a silo B, a quantitative feeding mechanism is installed in the silo B, a mixing drum installed obliquely for stirring and discharging materials is connected below the quantitative feeding mechanism, a stirring mechanism is installed in the mixing drum, a water supply mechanism connected to the inside of the mixing drum is also arranged on the mixing drum, and the water supply mechanism and the quantitative feeding mechanism are both electrically connected to a control mechanism arranged on the composite hopper.

[0011] In order to obtain uniform concrete and at the same time be able to continuously and uninterruptedly supply finished concrete, preferably, the stirring mechanism is drivingly connected to a second driver fixedly arranged on the frame, and the stirring mechanism includes a main body bracket drivingly connected to the second driver, and a stirring rod or stirring blades are fixedly connected to the main body bracket.

[0012] Further preferably, the stirring rods are evenly distributed on the main support in a circular array, any stirring rod is arranged straight along the length direction of the mixing barrel or spirally arranged with the axis of the main support, and the gap L1 between any stirring rod and the mixing barrel satisfies 5mm>L1>1mm or 30mm>L1>15mm.

[0013] Further preferably, the main support adopts a hollow or frame structure that allows concrete to pass freely.

[0014] Further preferably, the stirring blade adopts a spiral structure or a propeller structure, and the gap L2 between the stirring blade and the mixing barrel satisfies 30mm>L2>15mm.

[0015] In order to achieve better grey water mixing, preferably, the water supply mechanism comprises a plurality of water supply branches with one-way valves arranged on the mixing barrel, and the water supply branches cover the area where the stirring mechanism is located along the length direction of the mixing barrel.

[0016] In order to effectively and quantitatively control the supply of solid materials, preferably, the composite hopper has a hollow silo A inside, and the silo A is connected to the silo B. The quantitative feeding mechanism is connected to the first drive fixedly mounted on the frame, and the quantitative feeding mechanism includes a plurality of hopper units distributed in a circular array. The first drive drives the quantitative feeding mechanism to rotate so that the material in the silo A is quantitatively transported to the silo B through the hopper unit.

[0017] In order to prevent excessive coarse aggregate from entering the mixing device, preferably, the composite hopper has a hollow silo A inside, and a filter for filtering the coarse aggregate is arranged in the silo A, and the filter has at least one filtering surface with filter holes.

[0018] As a preferred structural setting of a filter, the filter has a multi-faceted filter hole structure that is small at the top and large at the bottom.

[0019] In order to improve the smoothness of material feeding and reduce the error of solid material feeding, preferably, a vibration mechanism is also provided on the composite hopper, and the vibration mechanism is electrically connected to the control mechanism.

[0020] Beneficial effects:

[0021] 1. The present invention uses a continuous operation mode of feeding, stirring and discharging to stir concrete, which can provide a continuous supply of concrete to the construction site and solve the problem of large site space occupation in the existing batch mixing form.

[0022] 2. The present invention adopts an integrated design of mixing, stirring and discharging, which can adjust the proportion of concrete by controlling the ratio of water supply to material supply, and can meet the mixing and production of concrete of different grades; at the same time, through the setting of different stirring mechanism structures, different materials can be stirred; and the mixing of concrete containing coarse aggregate and concrete without coarse aggregate can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a structural axonometric diagram of an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 Top view of the .

[0026] Figure 3 yes Figure 2Section view with center cut symbol AA.

[0027] Figure 4 yes Figure 2 Section view with center cut symbol BB.

[0028] Figure 5 yes Figure 4 Cross-sectional view along the center line with symbol CC (stirring rod structure).

[0029] Figure 6 yes Figure 4 Cross-sectional view along the center line with symbol CC (stirring blade structure).

[0030] In the figure: 1- hopper cover; 2- composite hopper; 21- silo A; 22- filter; 23- silo B; 24- quantitative feeding mechanism; 3- first drive; 4- second drive; 5- mixing barrel; 6- stirring mechanism; 61- main body bracket; 62- stirring rod; 63- stirring blade. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application 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 a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Embodiment 1:

[0038] This embodiment provides a continuous concrete mixing device. Figure 1-Figure 4 The structure shown specifically includes a frame, a composite hopper 2 installed on the frame for temporarily storing materials, the composite hopper 2 includes an upper feed port and a lower discharge port, the discharge port extends downward to form a silo B23, a quantitative feeding mechanism 24 is installed in the silo B23, and a mixing barrel 5 installed obliquely for stirring and discharging materials is connected below the quantitative feeding mechanism 24. A stirring mechanism 6 is installed in the mixing barrel 5, and a water supply mechanism connected to the inside of the mixing barrel 5 is also provided on the mixing barrel 5. The water supply mechanism and the quantitative feeding mechanism 24 are both electrically connected to a control mechanism arranged on the composite hopper 2.

[0039] Structure and working principle description:

[0040] See also Figure 1As shown, the continuous concrete mixing device provided in this embodiment includes a frame as a structural support, a composite hopper 2 fixedly installed or connected to the frame and connected from top to bottom, and the composite hopper 2 has a silo A21 for temporarily storing materials and a silo B23 located below the silo A21 for installing a quantitative feeding mechanism 24. The quantitative feeding mechanism 24 has two functions: one is to send the solid materials in the silo A21 to the silo B23 below, and the other is to perform quantitative transportation. Because solid materials, such as cement, river sand, etc., will naturally fall rapidly under the action of gravity, this will be uncontrolled and the ratio of solid materials to water when concrete is mixed cannot be guaranteed. Therefore, in order to obtain concrete with a preset grade ratio, it is necessary to quantitatively transport the incoming materials. The solid materials are fed into the mixing barrel 5 below through the quantitative feeding mechanism 24 to contact with the water provided by the water supply mechanism, and quickly form uniform concrete under the action of the rotating mixing mechanism 6, and use gravity to discharge along the mixing barrel 5 set downwardly. The biggest difference between this embodiment and the existing cement mixing equipment is that the entire concrete mixing process, from feeding, mixing, to discharging, is continuous. It is highly compatible with construction projects that require continuous construction and large amounts of concrete consumption, and solves the inevitable mixing and feeding waiting problems that exist in existing batch mixing. That is, according to the existing batch mixing method, no matter how many mixing equipment there are, there will inevitably be a lot of waiting time wasted, resulting in reduced efficiency and a large amount of space occupied on the construction site. For example, when pouring is required, it is first necessary to wait for the mixing device to completely mix the concrete before pouring. During pouring, even if other mixing equipment has completed mixing, it is necessary to wait for the concrete in the equipment currently pouring to be used up before pouring, thus causing waiting for feeding. Multiple mixing equipment need to temporarily use site space when loading, mixing, feeding and transporting. For example, the existing mixing tank trucks are necessarily not in the same position for loading and delivering, and the construction site is required to provide site space for cement tank trucks to transport. However, the continuous discharging form of this embodiment can adopt continuous transportation or direct pouring, which greatly reduces the space occupied by the site compared to existing cement mixing tank trucks, and when large-scale pouring is required, multiple units can be used at the same time, which not only ensures the continuity of concrete supply, but also greatly reduces the space occupied by the construction site.

[0041] In order to obtain uniform concrete and, at the same time, to be able to continuously and uninterruptedly supply finished concrete to meet the mixing of concrete of different grades and requirements, different structures of the mixing mechanism 6 are provided in this embodiment. Specifically, the mixing mechanism 6 is drivingly connected to the second driver 4 fixedly arranged on the frame, and the mixing mechanism 6 includes a main body bracket 61 drivingly connected to the second driver 4, and a mixing rod 62 or a mixing blade 63 is fixedly connected to the main body bracket 61. The main body bracket 61 is a main structure for coaxial rotation mounted on the output shaft of the second driver 4, and the mixing rod 62 is fixedly or detachably fixedly mounted on the main body bracket 61, and is used to fully mix the solid material and water in the mixing barrel 5. The technical problems and functions solved by using the mixing mechanism 6 of different structures for different mixing materials are described as follows:

[0042] Case 1: Mixing concrete without coarse aggregate

[0043] The mixing of concrete without coarse aggregate can adopt the structure of the stirring rod 62. The stirring rod 62 has good cutting performance for concrete without coarse aggregate and high mixing efficiency. It can obtain ideal concrete in a short time, generally within 2 seconds under the rated mixing speed condition. With the structure of this embodiment, the rated mixing speed will be significantly higher than the mixing speed of the existing mixing device or cement mixing tank truck. The mixing speed of this embodiment can reach 60-400 rpm, which is more efficient than the low-speed mixing of the existing mixing device. Since the mixing operation of this embodiment is carried out in the mixing barrel 5 and is not in direct contact with the air, the upper part is the closed material and the lower part is the finished concrete after mixing. Therefore, high-speed mixing will not cause bubbles in the concrete, but will greatly improve the mixing efficiency. The stirring rod 62 is fixed on the subject bracket 61 to form a frame structure, which can effectively stir the material in the mixing barrel 5 from the inside to the outside, and cooperate with the method of directly discretely injecting water into the mixing barrel 5, which can take into account the mixing efficiency and uniformity at the same time.

[0044] Case 2: Mixing concrete containing coarse aggregate

[0045] Coarse aggregate generally refers to the stones mixed in concrete. Generally, the particle size of the stones is not uniform and is usually between 10mm-25mm. This kind of concrete is generally used for cast-in-place operations of load-bearing buildings. This operation method generally does not adopt the structure of the stirring rod 62 in the above-mentioned situation 1, because the frame structure formed by the structure of the stirring rod 62 has a certain obstruction to the coarse aggregate, and has resistance to high-speed mixing and rapid mixing, and cannot achieve efficient discharging. The stirring speed must be reduced, and it is generally more appropriate to control it at 60-80 rpm, but this significantly reduces efficiency. For the mixing containing coarse aggregate, this embodiment provides a structure of a stirring blade 63. During the high-speed rotation process, the stirring blade 63 can form a vortex effect on the material mixing, and can quickly stir the concrete containing coarse aggregate without being blocked by the coarse aggregate and without causing stagnation.

[0046] Embodiment 2:

[0047] This embodiment is further improved on the basis of the first embodiment. In order to solve the problem of aggregate jamming or abnormal wear or extrusion of the stirring rod 62 or the stirring blade 63 caused by the non-uniform material structure, this embodiment debugs the relative position of the installation, and performs physical screening before the material enters the warehouse, and solves the problem of coarse aggregate jamming by combining prevention and eradication. Specifically, the solution of optimizing the installation structure and position of this embodiment is as follows:

[0048] First, for the screening of coarse aggregate, a filter 22 for filtering out-of-tolerance and oversized coarse aggregate is installed at the upper end of the silo A21 in the composite hopper 2. After filtering by the filter 22, the oversized coarse aggregate will be blocked and cannot enter the silo A21 to participate in the subsequent concrete mixing.

[0049] Secondly, the structure and installation position of the stirring mechanism 6 are defined. Figure 5 As shown, the stirring rods 62 are evenly distributed on the main support 61 in a circular array, and any stirring rod 62 is arranged straight along the length direction of the mixing barrel 5 or spirally arranged with the axis of the main support 61. The gap L1 between any stirring rod 62 and the mixing barrel 5 satisfies 5mm>L1>1mm or 30mm>L1>15mm.

[0050] The purpose of controlling the gap L1 between the stirring rod 62 and the mixing barrel 5 within the range of 1-5mm is to make the stirring rod 62 almost close to the inner wall of the mixing barrel 5. Since the gap is very small, the coarse aggregate will not be stuck in the gap between the stirring rod 62 and the inner wall of the mixing barrel 5, so that the coarse aggregate will not have an adverse effect on the mixing. The advantage of this arrangement is that when mixing concrete without coarse aggregate, the silted materials attached to the inner wall of the mixing barrel 5 can be scraped off in real time to avoid the problem of unevenness caused by material attachment. This embodiment also provides another installation scheme, that is, the gap L1 between the stirring rod 62 and the mixing barrel 5 is controlled within the range of 15-30mm. This is to increase the gap space so that the coarse aggregate can move freely in the gap space and be fully mixed. However, it should be emphasized here that if this solution is adopted, it must be used in conjunction with the filter 22 and the effective filtering size of the filter 22 should be smaller than the current specific value of L1. For example, when the current gap L1 = 20mm, the maximum coarse aggregate size allowed to pass through the filter 22 cannot exceed 19mm, so as to ensure that it is not affected during mixing.

[0051] Similarly, the above principle also applies to the stirring blade 63. The stirring blade 63 adopts a spiral structure or a propeller structure, and the gap L2 between the stirring blade 63 and the mixing barrel 5 satisfies 30mm>L2>15mm. The spiral structure refers to Figure 6 In the structure shown, the spiral structure rotates in the closed mixing barrel 5, which can make the mixed concrete produce a circular motion along the inner wall of the mixing barrel 5 and a small-range rolling in the gap L2, which is similar to the irregular rotation of the self-rotation, so that the concrete mixing will be more sufficient and more uniform. The propeller structure refers to a plurality of blades like propellers that are installed obliquely and distributed in a circular array on the main shaft structure connected to the output shaft of the second driver 4. This structure preferably uses a plurality of sets of blades that overlap and are installed at intervals on the same axis. The stirring principle is different from that of the spiral structure. The blades of the propeller structure drive the material to rotate while also having an axial driving effect on the concrete. This will be more conducive to discharging and better solve the problem of silting of the concrete in the mixing barrel 5 after mixing.

[0052] In order to achieve better gray water mixing, in this embodiment, the water supply mechanism includes a plurality of water supply branches with one-way valves arranged on the mixing barrel 5, and the water supply branches cover the area where the stirring mechanism 6 is located along the length direction of the mixing barrel 5. The coverage of the water supply branches should be understood as follows:

[0053] For example, the total length of the mixing barrel 5 is 1000mm, and the positive direction is from the end close to the second driver 4 to the outlet end. The position at 300mm is the farthest end of the stirring mechanism 6, and the end close to the second driver 4 is the closest end, that is, the 0mm position. Then the stirring mechanism 6 is located in the 0-300mm position section. Correspondingly, the position where the water supply branch pipe is installed on the mixing barrel 5 should achieve full coverage of the 0-300mm position. The advantage of this setting is that the stirring mechanism 6 can fully mix the solid material and water through a very short time of stirring, avoiding the blind spot of solid-liquid separation.

[0054] Embodiment 3:

[0055] In order to effectively and quantitatively control the supply of solid materials, this embodiment is further optimized on the basis of any of the above embodiments. Figure 1-Figure 6 As shown, the compound hopper 2 has a hollow silo A21 inside, and the silo A21 is connected to the silo B23. The quantitative feeding mechanism 24 is driven and connected to the first driver 3 fixedly installed on the frame. The quantitative feeding mechanism 24 includes a plurality of hopper units distributed in a circular array. The first driver 3 drives the quantitative feeding mechanism 24 to rotate so that the material in the silo A21 is quantitatively transported to the silo B23 through the hopper unit.

[0056] In order to prevent excessive coarse aggregate from entering the mixing device, in this embodiment, the composite hopper 2 has a hollow silo A21 inside, and a filter 22 for filtering coarse aggregate is arranged in the silo A21, and the filter 22 has at least one filtering surface with filter holes. Figure 3-Figure 4 As shown, the multi-faceted structural setting can effectively increase the filtering area and improve the filtering efficiency. Of course, it is worth explaining and emphasizing that the filter 22 of this embodiment is the last checkpoint screening for the materials that have been accepted. In theory, the materials that do not meet the particle size requirements will be very few, and only individual out-of-tolerance materials are filtered. In actual construction, the materials used are classified after screening according to fixed specifications by the quarry. Therefore, the filter 22 of this embodiment plays a preventive and protective role, and does not mainly bear the filtering role or the filtering workload is not heavy.

[0057] As a preferred structural setting of the filter 22, the filter 22 is a multi-faceted filter hole structure with small top and large bottom. For example, a four-sided cone structure is adopted.

[0058] In order to improve the smoothness of material discharge and reduce the error of solid material discharge, in this embodiment, a vibration mechanism is also provided on the composite hopper 2, and the vibration mechanism is electrically connected to the control mechanism. The vibration mechanism provides vibration to the composite hopper 2, the purpose of which is to ensure the normal flow of materials from top to bottom, to ensure the smooth progress of concrete mixing, to avoid the internal friction between materials causing the materials to be slightly stuck, to form a balancing force and not fall with gravity. Of course, it should be noted again that the vibration mechanism is only a preferred optional setting, because when the first driver 3 and the second driver 4 work at the same time, obvious vibration will also be generated. It is only for materials that are affected by moisture that the problem of poor material discharge may occur, and a vibration mechanism needs to be added. The vibration mechanism can adopt the existing eccentric rotary vibration product. The present invention only integrates the vibration structure to solve the problem of damp material stuck, and does not improve the internal structure of the vibration mechanism.

[0059] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous concrete mixing device, comprising a frame, a composite hopper (2) mounted on the frame for temporarily storing materials, the composite hopper (2) comprising an upper feed inlet and a lower discharge outlet, characterized in that: The discharge port extends downward to form a silo B (23), a quantitative feeding mechanism (24) is installed in the silo B (23), and a mixing cylinder (5) installed obliquely for stirring and discharging is connected below the quantitative feeding mechanism (24), a stirring mechanism (6) is installed in the mixing cylinder (5), and a water supply mechanism connected to the inside of the mixing cylinder (5) is also provided on the mixing cylinder (5), and the water supply mechanism and the quantitative feeding mechanism (24) are both electrically connected to a control mechanism provided on the composite hopper (2).

2. A continuous concrete mixing device according to claim 1, characterized in that: The stirring mechanism (6) is drivingly connected to a second driver (4) fixedly arranged on a frame, and the stirring mechanism (6) comprises a main frame (61) drivingly connected to the second driver (4), and a stirring rod (62) or a stirring blade (63) is fixedly connected to the main frame (61).

3. A continuous concrete mixing device according to claim 2, characterized in that: The stirring rods (62) are evenly distributed on the main support (61) in a circular array, and any stirring rod (62) is arranged straight along the length direction of the mixing barrel (5) or is arranged in a spiral shape with the axis of the main support (61), and the gap L1 between any stirring rod (62) and the mixing barrel (5) satisfies 5mm>L1>1mm or 30mm>L1>15mm.

4. A continuous concrete mixing device according to claim 3, characterized in that: The main support (61) adopts a hollow or frame structure that allows concrete to pass freely.

5. A continuous concrete mixing device according to claim 2, characterized in that: The stirring blade (63) adopts a spiral structure or a propeller structure, and the gap L2 between the stirring blade (63) and the mixing barrel (5) satisfies 30mm>L2>15mm.

6. A continuous concrete mixing device according to claim 2, characterized in that: The water supply mechanism comprises a plurality of water supply branch pipes with one-way valves arranged on the mixing barrel (5), and the water supply branch pipes cover the area where the stirring mechanism (6) is located along the length direction of the mixing barrel (5).

7. A continuous concrete mixing device according to any one of claims 1 to 6, characterized in that: The composite hopper (2) has a hollow silo A (21) inside, the silo A (21) is connected to a silo B (23), the quantitative feeding mechanism (24) is drivingly connected to a first driver (3) fixedly mounted on a frame, the quantitative feeding mechanism (24) comprises a plurality of hopper units distributed in a circular array, and the first driver (3) drives the quantitative feeding mechanism (24) to rotate so that the material in the silo A (21) is quantitatively transported to the silo B (23) through the hopper units.

8. A continuous concrete mixing device according to any one of claims 1 to 6, characterized in that: The composite hopper (2) has a hollow silo A (21) inside, and a filter (22) for filtering coarse aggregate is arranged inside the silo A (21), and the filter (22) has at least one filtering surface with filter holes.

9. A continuous concrete mixing device according to claim 8, characterized in that: The filter (22) has a multi-faceted filter hole structure that is small at the top and large at the bottom.

10. A continuous concrete mixing device according to any one of claims 1 to 6 and 9, characterized in that: The composite hopper (2) is also provided with a vibration mechanism, and the vibration mechanism is electrically connected to the control mechanism.

Images