A concrete raw material mixing device

Abstract

This application relates to the field of material mixing, and in particular to a concrete raw material mixing device, which includes a mixing drum. The inner cavity of the mixing drum is divided into a dry mixing chamber and a wet mixing chamber by a mounting plate. The mixing assembly includes a dry mixing shaft sleeve, a wet mixing shaft sleeve, and mixing blades. A drive component, through a transmission assembly, enables the dry mixing shaft sleeve or the wet mixing shaft sleeve to rotate independently. The mounting plate has a material discharge assembly. The transmission assembly includes a drive shaft and two inner ratchet and pawl assemblies with opposite transmission directions. The material discharge assembly includes a baffle, a slide, a push rod, and a linkage assembly. There are also a material conveying assembly and a material discharging assembly. When the drive component drives the dry mixing shaft sleeve to rotate forward, the material discharge channel is blocked; when it drives the wet mixing shaft sleeve to rotate in the reverse direction, the material discharge channel is opened. This application achieves the technical effect of enabling concrete raw materials to be dry-mixed first and then wet-mixed, realizing staged mixing, and the conversion between dry and wet mixing can be controlled by the forward and reverse rotation of the drive component.

Description

Technical Field

[0001] This application relates to the field of concrete preparation, and more particularly to a concrete raw material mixing device. Background Technology

[0002] In the construction industry, concrete is an extremely important basic material, and its quality directly affects the stability and durability of building structures. With the continuous development of the construction industry, the performance requirements for concrete are also increasing, prompting continuous innovation in concrete production technology. Efficient and uniform concrete mixing is crucial for ensuring building quality; therefore, the research and improvement of concrete raw material mixing equipment has always been a key focus of the industry. Advanced mixing equipment can fully integrate the various components of concrete, improving its strength and workability, thereby driving construction projects towards higher quality and safety.

[0003] In the past, the traditional method for mixing concrete raw materials involved adding all the materials into a mixing plant at once. Some methods completed the entire mixing process within a single mixing chamber; operators would first pour the dry materials into the chamber, then add water or other liquids, and finally start the mixer. Other methods used multiple mixing plants sequentially, mixing the dry materials in one plant first, and then manually transferring the materials to another plant to add liquids for wet mixing. While these methods achieved some degree of mixing of concrete raw materials, the process was cumbersome and required manual coordination of multiple steps.

[0004] Traditional concrete mixing methods have significant drawbacks. Adding all materials at once for mixing makes it difficult to ensure that dry materials are thoroughly and evenly mixed before contacting liquids, leading to inconsistent final concrete quality. Furthermore, manually transporting dry materials to the wet mixing stage not only increases labor costs but also increases the risk of spillage and loss during transport. Additionally, it makes it difficult to transfer dry-mixed materials to the wet mixing stage in a timely and accurate manner, impacting the overall efficiency and quality of concrete production. Summary of the Invention

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide a concrete raw material mixing device. A concrete raw material mixing device includes a mixing drum, a conveying assembly, a discharging assembly, a mixing assembly, and a driving component for driving the mixing assembly. An mounting plate is provided in the inner cavity of the mixing drum, dividing the inner cavity into a dry mixing chamber and a wet mixing chamber. The mixing assembly includes a dry mixing shaft sleeve rotatably disposed in the dry mixing chamber, a wet mixing shaft sleeve rotatably disposed in the wet mixing chamber, and mixing blades respectively disposed on the dry and wet mixing shaft sleeves. A transmission assembly is provided between the driving component and the mixing blades, capable of independently driving either the dry or wet mixing shaft sleeves to rotate. The mounting plate also includes a material discharge assembly for transferring the mixed dry material into the wet mixing chamber. When the driving component drives the dry mixing shaft sleeve to rotate forward, the transmission assembly simultaneously drives the material discharge channel of the material discharge assembly to be blocked. When the driving component drives the wet mixing shaft sleeve to rotate in the reverse direction, the transmission assembly simultaneously drives the material discharge channel of the material discharge assembly to actively open for material feeding.

[0006] By adopting the above technical solution, during the concrete raw material mixing process, the conveying component transports the raw materials into the mixing drum. The drive component drives the dry mixing bushing to rotate forward, causing the mixing blades on the dry mixing bushing to pre-dry mix the aggregate in the dry mixing chamber. At this time, the transmission component simultaneously blocks the discharge channel of the discharge component, ensuring that materials do not enter the wet mixing chamber during the dry mixing process, allowing the aggregate to be fully and uniformly mixed in the dry mixing chamber. After the dry mixing is completed, the drive component drives the wet mixing bushing to rotate in the reverse direction. At this time, the dry mixing bushing stops rotating, saving the load power consumption of the drive component. The transmission component simultaneously drives the discharge channel of the discharge component to actively open, putting the mixed dry material into the wet mixing chamber. The mixing blades on the wet mixing bushing wet-mix the dry material and other materials, realizing the orderly connection between dry mixing and wet mixing, and improving the mixing quality and efficiency of concrete raw materials.

[0007] Preferably, the driving component is disposed at the top of the mixing tank, and the transmission assembly includes a transmission shaft coaxially disposed inside the mixing tank and inner ratchet and pawl assemblies respectively disposed at both ends of the transmission shaft. One end of the transmission shaft passes through the dry mixing shaft sleeve, and the other end passes through the wet mixing shaft sleeve. One inner ratchet and pawl assembly is disposed in the dry mixing shaft sleeve, and the other is disposed in the wet mixing shaft sleeve, and the transmission directions of the two inner ratchet and pawl assemblies are arranged in opposite directions.

[0008] By adopting the above technical solution, the drive component is positioned at the top of the mixing tank. A coaxial drive shaft is used within the mixing tank, along with internal ratchet and pawl assemblies located at both ends of the drive shaft and within the dry and wet mixing sleeves, respectively. Since the two internal ratchet and pawl assemblies operate in opposite directions, when the drive component causes the dry mixing sleeve to rotate forward, the corresponding internal ratchet and pawl assembly rotates the dry mixing sleeve, while the other internal ratchet and pawl assembly stops the wet mixing sleeve from rotating, allowing focus on the dry mixing operation. Conversely, when the drive component causes the wet mixing sleeve to rotate in the opposite direction, one internal ratchet and pawl assembly rotates the wet mixing sleeve, while the other stops the dry mixing sleeve from rotating, allowing focus on the wet mixing operation. This internal ratchet and pawl structure reduces the power consumption of the drive component and enables independent rotation of the dry and wet mixing sleeves.

[0009] Preferably, the mounting plate has a material discharge hole, and the material discharge assembly includes a baffle hinged to the mounting plate for blocking the material discharge hole, a slide block that slides axially along the drive shaft in the wet mixing chamber, a push rod fixed on the slide block for abutting the baffle, and a linkage assembly disposed in the wet mixing chamber for driving the slide block to be lifted after the drive shaft rotates in the opposite direction. The slide block is located between the linkage assembly and the baffle, and the push rod is inclined from the inside to the outside.

[0010] By adopting the above technical solution, when the drive shaft rotates in the reverse direction, the linkage component will drive the slide to slide downward along the drive shaft axis. The slide will drive the inclined push rod to move synchronously. The end of the push rod will disengage from the baffle. The baffle will rotate around the hinge point without any resistance, thereby opening the baffle that originally blocked the material drop hole. The dry material mixed in the dry mixing chamber can fall into the wet mixing chamber through the material drop hole, realizing the dynamic feeding process of dry material into the wet mixing chamber.

[0011] Preferably, the linkage assembly includes a mounting base fixed on the mounting plate, a gear coaxially fixed on the transmission shaft inside the wet mixing chamber, a rack sliding on the mounting base, limiting teeth sliding at both ends of the rack, a spring disposed between the limiting teeth and the rack, a guide plate fixed on the rack, and a guide wheel fixed on the slide block for use with the guide plate. The height of the guide plate increases gradually along the length of the rack, and the rack meshes with the gear.

[0012] By adopting the above technical solution, when the drive shaft rotates in the reverse direction, the gear fixed on it rotates synchronously. Since the rack meshes with the gear, it can drive the rack to slide on the mounting base. As the rack slides, the guide plate, whose height increases along the length direction, moves synchronously on it. Since the guide wheel works with the guide plate and is fixed on the slide, the linkage component drives the slide to slide downward along the drive shaft axis. The slide drives the inclined push rod to move synchronously. The end of the push rod disengages from the baffle. The baffle rotates around the hinge point without any resistance, thereby opening the baffle that originally blocked the material discharge hole. The dry mixed material in the dry mixing chamber can fall into the wet mixing chamber through the material discharge hole, realizing the dynamic feeding process of dry mixed material into the wet mixing chamber. When the rack slides into place, since the drive shaft still needs to rotate continuously, the gear meshes with the limiting tooth. Since there is a gap between the limiting tooth and the rack and they are connected by a spring, the limiting tooth will be repeatedly squeezed. At this time, the rack is still stationary, so the baffle is always open. Conversely, it is always blocked from the material discharge hole.

[0013] Preferably, both ends of the guide plate are provided with limit blocks, and the guide wheel rolls between the two limit blocks.

[0014] By adopting the above technical solution, limiting blocks are set at both ends of the guide plate to make the guide wheel roll between the two limiting blocks, which can prevent the guide wheel from detaching from the guide plate, ensure the stable operation of the linkage component, and thus ensure that the material dropping component can stably realize the opening and closing of the material dropping channel, maintain the normal working process of the concrete raw material mixing device, and improve the stability and reliability of the device operation.

[0015] Preferably, the mounting base includes an open mounting shell and a corrugated plate disposed on the mounting shell. The opening of the mounting shell faces the side of the baffle. The corrugated plate is installed at the opening of the mounting shell. The slide, gear, and rack are all located inside the mounting shell. The push rod and the baffle are located outside the mounting shell.

[0016] By adopting the above technical solution, the mounting shell and corrugated plate of the mounting base can protect the slide, gear and rack, and reduce the impact of external factors on these components; placing the slide, gear and rack inside the mounting shell, and the top rod and baffle outside the mounting shell, the components are reasonably arranged, which facilitates the cooperation between the linkage component and the material feeding component, enables the material feeding component to work normally, realizes the transfer of dry mixing material to the wet mixing chamber, ensures the stable operation of components such as gears and racks, and reduces dust adhesion.

[0017] Preferably, the mounting plate is inclined on one side of the dry mixing chamber, and the inclined surface of the mounting plate is inclined toward the material discharge hole.

[0018] By adopting the above technical solution, the mounting plate is set at an angle on one side of the dry mixing chamber and the inclined surface is tilted towards the material discharge hole. This allows the dry material in the dry mixing chamber to flow better towards the material discharge hole along the inclined surface, making it easier for the dry material to enter the wet mixing chamber through the material discharge hole for the next step of mixing, thus improving the material discharge efficiency and transfer effect of the dry material.

[0019] Preferably, the material conveying assembly includes several screw conveyors disposed at the top of the mixing tank and a conveying pump disposed on the side of the mixing tank for conveying materials into the wet mixing chamber.

[0020] By adopting the above technical solution, several screw conveyors at the top of the mixing drum can continuously transport materials into the mixing drum, while the conveying pump on the side of the mixing drum can continuously transport materials into the wet mixing chamber, realizing dynamic conveying of materials to the mixing drum and the wet mixing chamber, and ensuring a stable supply of materials.

[0021] Preferably, the discharge assembly includes a discharge pipe disposed at the bottom of the mixing tank and communicating with the inner cavity of the wet mixing chamber, and a valve disposed on the discharge pipe.

[0022] By adopting the above technical solution, the discharge pipe is set at the bottom of the mixing tank and connected to the inner cavity of the wet mixing chamber, which allows the mixed concrete to be discharged smoothly from the wet mixing chamber; the valve can control the opening and closing of the discharge pipe, making it easy to control the timing and amount of discharge.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up dry mixing chambers and wet mixing chambers, and independently controlling the rotation of the dry mixing bushing and the wet mixing bushing, the dry materials can be fully mixed before contacting the liquid, thereby improving the quality stability of the final concrete. 2. By utilizing the transmission assembly, the material discharge channel is blocked when the dry mixing shaft sleeve rotates in the forward direction, and the material discharge channel is opened when the wet mixing shaft sleeve rotates in the reverse direction, so as to realize the automatic and precise transfer of dry mixing material to the wet mixing chamber and improve concrete production efficiency. 3. The device eliminates the need for manual handling of dry materials, reducing labor costs and minimizing spillage and loss of raw materials. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the internal structure of the mixing tank in this application; Figure 3 This is a top view of the internal cavity structure after the mixing tank has been removed in this application; Figure 4 This is a schematic diagram of the internal ratchet and pawl assembly in this application; Figure 5 This is a structural diagram showing the installation positions of the mixing assembly and the linkage assembly in this application; Figure 6 This application is primarily used to illustrate the structural diagram of the linkage components; Figure 7 This is a partial structural diagram of the linkage component part of this application; Reference numerals: 1. Mixing tank; 2. Conveying assembly; 3. Discharging assembly; 4. Mixing assembly; 5. Drive component; 6. Mounting plate; 7. Dry mixing chamber; 8. Wet mixing chamber; 9. Dry mixing bushing; 10. Wet mixing bushing; 11. Mixing blade; 12. Transmission assembly; 13. Discharge assembly; 14. Drive shaft; 15. Inner ratchet and pawl assembly; 16. Discharge hole; 17. Baffle; 18. Slide seat; 19. Push rod; 20. Linkage assembly; 21. Mounting seat; 22. Gear; 23. Rack; 24. Limiting tooth; 25. Spring; 26. Guide plate; 27. Guide wheel; 28. Limiting block; 29. ​​Mounting shell; 30. Corrugated plate; 31. Screw conveyor; 32. Conveying pump; 33. Discharge pipe; 34. Valve. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0026] Reference Figure 1 and Figure 2 The concrete raw material mixing device provided in this application includes a mixing tank 1, a conveying component 2, a discharging component 3, a mixing component 4, and a driving component 5 for driving the mixing component 4. The mixing tank 1 is installed on a frame, and an installation plate 6 is installed inside the mixing tank 1. The installation plate 6 divides the inner cavity of the mixing tank 1 into a dry mixing chamber 7 and a wet mixing chamber 8. This separate mixing of dry and wet raw materials avoids the problem of dry materials coming into contact with liquid before being fully mixed in the traditional method, and can improve the mixing quality and stability of concrete.

[0027] Reference Figure 2 The mixing assembly 4 includes a dry mixing sleeve 9, a wet mixing sleeve 10, and mixing blades 11. The dry mixing sleeve 9 is rotatably disposed in the dry mixing chamber 7, and the wet mixing sleeve 10 is rotatably disposed in the wet mixing chamber 8. The mixing blades 11 are respectively disposed on the dry mixing sleeve 9 and the wet mixing sleeve 10. A transmission assembly 12 is provided between the driving component 5 and the mixing blades 11, which can independently drive the dry mixing sleeve 9 or the wet mixing sleeve 10 to rotate separately, which facilitates flexible operation according to different mixing stages.

[0028] Reference Figure 2 and Figure 3The mounting plate 6 is also equipped with a material discharge assembly 13, which is used to move the mixed dry material into the wet mixing chamber 8. When the driving component 5 drives the dry mixing shaft sleeve 9 to rotate in the forward direction, the transmission assembly 12 synchronously drives the material discharge channel of the material discharge assembly 13 to be in a blocked state to prevent material leakage during the dry mixing process. When the driving component 5 drives the wet mixing shaft sleeve 10 to rotate in the reverse direction, the transmission assembly 12 synchronously drives the material discharge channel of the material discharge assembly 13 to actively open for feeding, realizing automatic and accurate material discharge and improving production efficiency.

[0029] Reference Figure 1 and Figure 2 Specifically, the material conveying assembly 2 includes several screw conveyors 31 and a conveying pump 32. The screw conveyors 31 are positioned at the top of the mixing tank 1 and are used to convey solid raw materials, such as sand and cement, into the dry mixing chamber 7. The screw conveyors 31 have advantages such as high conveying efficiency and good sealing, effectively preventing spillage and loss of raw materials during conveying. The outer shell of the screw conveyor 31 is usually made of metal, and rotating helical blades are installed inside. The rotation of the helical blades conveys the raw materials from the feed inlet into the dry mixing chamber 7. In addition to screw conveyors 31, belt conveyors can also be used instead. Belt conveyors are suitable for situations with large conveying volumes and long distances; they convey raw materials through the rotation of the belt.

[0030] Reference Figure 1 and Figure 2 The transfer pump 32 is located on the side of the mixing tank 1 and is used to transport materials into the wet mixing chamber 8, mainly liquid materials such as water and additives. The transfer pump 32 is generally a centrifugal pump. The centrifugal pump uses the high-speed rotation of the impeller to generate centrifugal force, drawing in the liquid material and transporting it into the wet mixing chamber 8. Alternatively, a screw pump can be used instead of a centrifugal pump. Screw pumps have the characteristics of stable flow rate and small pressure fluctuations, making them suitable for transporting liquid materials with high flow rate and pressure requirements.

[0031] Reference Figure 1 and Figure 2 The discharge assembly 3 includes a discharge pipe 33 and a valve. The discharge pipe 33 is located at the bottom of the mixing tank 1 and connects to the inner cavity of the wet mixing chamber 8, used to discharge the mixed concrete. The discharge pipe 33 is usually made of steel pipe, which has a certain strength and corrosion resistance. The valve is located on the discharge pipe 33 and is used to control the opening and closing of the discharge and the flow rate. A butterfly valve can be selected, as butterfly valves are simple in structure, small in size, and easy to operate.

[0032] Reference Figure 2The dry mixing sleeve 9 and wet mixing sleeve 10 in the mixing assembly 4 are rotatably mounted in the dry mixing chamber 7 and wet mixing chamber 8, respectively. Their function is to drive the mixing blades 11 to rotate, thereby achieving mixing of the raw materials. The dry mixing sleeve 9 and wet mixing sleeve 10 are generally made of high-strength alloy steel to ensure their stability and wear resistance during long-term rotation. The two sets of mixing blades 11 are fixed on the dry mixing sleeve 9 and wet mixing sleeve 10, respectively. The shape of the mixing blades 11 can be paddle type, spiral type, etc. Paddle type mixing blades 11 are suitable for low-speed mixing, which can make the raw materials form greater convection during the mixing process and improve the mixing effect; spiral type mixing blades 11 are suitable for high-speed mixing, which can make the raw materials generate strong shear force during the mixing process and further refine the raw material particles.

[0033] Reference Figure 2 and Figure 3 The drive unit 5 is located at the top of the mixing tank 1 and provides power to the mixing assembly 4. The drive unit 5 is generally an electric motor, which has advantages such as stable speed and adjustable power. The electric motor is connected to the transmission assembly 12 via a coupling, transmitting power to the transmission assembly 12. The transmission assembly 12 includes a drive shaft 14 and inner ratchet and pawl assemblies 15. The drive shaft 14 is coaxially arranged inside the mixing tank 1, with one end passing through the dry mixing sleeve 9 and the other end passing through the wet mixing sleeve 10, serving to transmit power. The drive shaft 14 is usually made of solid steel, possessing high strength and rigidity. Two sets of inner ratchet and pawl assemblies 15 are respectively located at both ends of the drive shaft 14, one inside the dry mixing sleeve 9 and the other inside the wet mixing sleeve 10, with the transmission directions of the two inner ratchet and pawl assemblies 15 being opposite.

[0034] Reference Figure 2 , Figure 3 and Figure 4 When the drive component 5 rotates in the forward direction, one of the inner ratchet and pawl assemblies 15 drives the dry mixing shaft sleeve 9 to rotate, while the other inner ratchet and pawl assembly 15 is in an idle state; the situation is reversed when the drive component 5 rotates in the reverse direction. The inner ratchet and pawl assembly 15 consists of an inner ratchet, a pawl, and a spring 25. The two inner ratchets are coaxially fixedly connected to the dry mixing shaft sleeve 9 and the wet mixing shaft sleeve 10, respectively. The two pawls are coaxially mounted on the drive shaft 14. Specifically, a disc can be coaxially fixed on the drive shaft 14, and the pawls and torsion springs can be mounted on the disc, with the disc located inside the inner ratchet. When the drive shaft 14 rotates, the pawls engage or disengage with the ratchet under the action of the torsion spring, thereby realizing the transmission or disconnection of power.

[0035] Reference Figure 3 , Figure 5 and Figure 6The mounting plate 6 has a material discharge hole 16, and the material discharge assembly 13 includes a baffle 17, a slide 18, a push rod 19, and a linkage assembly 20. In this embodiment, the mounting plate 6 is inclined on one side of the dry mixing chamber 7, and the inclined surface of the mounting plate 6 is inclined toward the material discharge hole 16, which is conducive to the dry mixing material flowing smoothly to the material discharge hole 16 under the action of gravity.

[0036] Reference Figure 3 and Figure 6 The baffle 17 is hinged to the mounting plate 6 and is used to block the material discharge hole 16 to prevent material leakage during dry mixing. The baffle 17 is generally made of steel plate with a smooth surface to reduce material adhesion. The slide 18 slides axially along the drive shaft 14 in the wet mixing chamber 8. The slide 18 is usually made of aluminum alloy, which has the advantages of light weight and good sliding performance.

[0037] Reference Figure 3 and Figure 6 The push rod 19 is fixed on the slide block 18 and abuts against the baffle 17. The push rod 19 is inclined from the inside to the outside, so that when the slide block 18 moves upward, the push rod 19 can better push the baffle 17 to open. In this embodiment, the push rod 19 and the baffle 17 can also be connected by a sliding groove opened on the side wall of the baffle 17, so that a slider is set in the sliding groove, and the end of the push rod 19 is hinged to the slider. In this embodiment, the end of the push rod 19 and the baffle 17 are in contact. The baffle 17 flips by its own weight. When the baffle 17 blocks the material discharge hole 16, it is achieved by abutting against the baffle 17.

[0038] Reference Figure 2 , Figure 5 and Figure 7The linkage assembly 20 is disposed within the wet mixing chamber 8 and is used to drive the slide 18 to be lifted after the drive shaft 14 rotates in the reverse direction. The linkage assembly 20 includes a mounting base 21, a gear 22, a rack 23, a limiting gear 24, a spring 25, a guide plate 26, and a guide wheel 27. The mounting base 21 is fixed to the mounting plate 6 and includes an open mounting shell 29 and a corrugated plate 30 disposed on the mounting shell 29. The opening of the mounting shell 29 faces the baffle 17, and the corrugated plate 30 is installed at the opening of the mounting shell 29 to prevent dust and protect the internal parts. The slide 18, as well as the gear 22 and the rack 23, are all located inside the mounting shell 29, while the push rod 19 and the baffle 17 are located outside the mounting shell 29. The gear 22 is coaxially fixed to the drive shaft 14 within the wet mixing chamber 8, and the rack 23 slides on the mounting base 21 and meshes with the gear 22. When the drive shaft 14 rotates, the gear 22 drives the rack 23 to move. The limiting teeth 24 slide at both ends of the rack 23 to maintain the contact between the rack 23 and the gear 22. The spring 25 is disposed between the limiting teeth 24 and the rack 23. This arrangement is designed so that when the rack 23 slides into place, the transmission shaft 14 still needs to rotate continuously. At this time, the gear 22 engages with the limiting teeth 24. Since there is a gap between the limiting teeth 24 and the rack 23 and they are connected by the spring 25, the limiting teeth 24 will be repeatedly squeezed. At this time, the rack 23 remains stationary. Thus, even if the transmission shaft 14 rotates, the baffle 17 remains open. Conversely, it remains blocked from the material discharge hole 16.

[0039] Reference Figure 7 The guide plate 26 is fixed to the rack 23, and the height of the guide plate 26 increases progressively along the length of the rack 23. The guide wheel 27 is fixed to the slide block 18 and works in conjunction with the guide plate 26. When the rack 23 moves, the guide plate 26 pushes the guide wheel 27, thereby causing the slide block 18 to move upward. Limit blocks 28 are provided at both ends of the guide plate 26, and the guide wheel 27 rolls between the two limit blocks 28 to prevent it from detaching from the guide plate 26.

[0040] The implementation principle of this embodiment is as follows: When using this concrete raw material mixing device, the solid raw materials are first transported to the dry mixing chamber 7 by the screw conveyor 31. The drive component 5 is started to rotate in the forward direction, which drives the dry mixing bushing 9 to rotate through the transmission component 12. The mixing blades 11 on the dry mixing bushing 9 mix the dry material. At this time, due to the transmission direction setting of the ratchet and pawl assembly, the wet mixing bushing 10 does not rotate. At the same time, the transmission component 12 keeps the material discharge channel of the material discharge component 13 blocked to prevent the dry material from entering the wet mixing chamber 8. After the dry material is mixed evenly, the drive component 5 is reversed, which drives the wet mixing bushing 10 to rotate through the transmission component 12. At the same time, the linkage component 20 drives the slide 18 to be lifted, and the push rod 19 pushes the baffle 17 to open the material discharge hole 16. The dry material falls into the wet mixing chamber 8 under the action of gravity. At the same time, the liquid material is transported into the wet mixing chamber 8 by the delivery pump 32, and the mixing blades 11 on the wet mixing bushing 10 mix the dry and wet materials. Finally, the valve on the discharge pipe 33 is opened to discharge the mixed concrete. This device avoids the defects of traditional mixing methods by using dry and wet chamber mixing and automatic material feeding, improves the mixing uniformity and production efficiency of concrete raw materials, reduces labor costs, reduces raw material loss, and ensures the quality of concrete. It is an effective improvement on existing concrete raw material mixing technology.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete raw material mixing device, comprising a mixing drum (1), a material feeding assembly (2), a material discharging assembly (3), a stirring assembly (4) and a driving member (5) for driving the stirring assembly (4) to operate, characterized in that: An installation plate (6) is provided in the inner cavity of the mixing tank (1), which divides the inner cavity of the mixing tank (1) into a dry mixing chamber (7) and a wet mixing chamber (8). The mixing assembly (4) includes a dry mixing sleeve (9) rotatably disposed in the dry mixing chamber (7), a wet mixing sleeve (10) rotatably disposed in the wet mixing chamber (8), and mixing blades (11) respectively disposed on the dry mixing sleeve (9) and the wet mixing sleeve (10). A drive member (5) is provided between the drive member (5) and the mixing blades (11) to independently drive the dry mixing sleeve (9). The transmission assembly (12) that rotates independently of the dry mixing bushing (10) or the wet mixing bushing (10) is provided on the mounting plate (6). The mounting plate (6) is also provided with a material discharge assembly (13) for moving the mixed dry material into the wet mixing chamber (8). When the driving member (5) drives the dry mixing bushing (9) to rotate in the forward direction, the transmission assembly (12) synchronously drives the material discharge channel of the material discharge assembly (13) to be in a blocked state. When the driving member (5) drives the wet mixing bushing (10) to rotate in the reverse direction, the transmission assembly (12) synchronously drives the material discharge channel of the material discharge assembly (13) to actively open for feeding.

2. The concrete raw material mixing device according to claim 1, characterized in that: The drive unit (5) is located at the top of the mixing tank (1). The transmission assembly (12) includes a transmission shaft (14) coaxially arranged in the mixing tank (1) and inner ratchet and pawl assemblies (15) respectively arranged at both ends of the transmission shaft (14). One end of the transmission shaft (14) passes through the dry mixing sleeve (9) and the other end passes through the wet mixing sleeve (10). One inner ratchet and pawl assembly (15) is arranged in the dry mixing sleeve (9) and the other is arranged in the wet mixing sleeve (10). The transmission directions of the two inner ratchet and pawl assemblies (15) are opposite.

3. The concrete raw material mixing device according to claim 2, characterized in that: The mounting plate (6) is provided with a material discharge hole (16). The material discharge assembly (13) includes a baffle (17) hinged to the mounting plate (6) for blocking the material discharge hole (16), a slide (18) that slides axially along the drive shaft (14) in the wet mixing chamber (8), a push rod (19) fixed on the slide (18) for abutting the baffle (17), and a linkage assembly (20) set in the wet mixing chamber (8) for driving the slide (18) to be lifted after the drive shaft (14) rotates in the opposite direction. The slide (18) is located between the linkage assembly (20) and the baffle (17), and the push rod (19) is inclined from the inside to the outside.

4. A concrete raw material mixing device according to claim 3, characterized in that: The linkage assembly (20) includes a mounting base (21) fixed on the mounting plate (6), a gear (22) coaxially fixed on the transmission shaft (14) inside the wet mixing chamber (8), a rack (23) sliding on the mounting base (21), limiting teeth (24) sliding on both ends of the rack (23), a spring (25) set between the limiting teeth (24) and the rack (23), a guide plate (26) fixed on the rack (23), and a guide wheel (27) fixed on the slide (18) and used in conjunction with the guide plate (26). The height of the guide plate (26) increases along the length of the rack (23), and the rack (23) meshes with the gear (22).

5. A concrete raw material mixing device according to claim 4, characterized in that: Both ends of the guide plate (26) are provided with limit blocks (28), and the guide wheel (27) rolls between the two limit blocks (28).

6. A concrete raw material mixing device according to claim 4, characterized in that: The mounting base (21) includes a mounting shell (29) with an opening and a corrugated plate (30) disposed on the mounting shell (29). The opening of the mounting shell (29) is disposed facing the baffle (17). The corrugated plate (30) is installed at the opening of the mounting shell (29). The slide (18), gear (22), and rack (23) are all located inside the mounting shell (29). The push rod (19) and the baffle (17) are located outside the mounting shell (29).

7. A concrete raw material mixing device according to claim 3, characterized in that: The mounting plate (6) is located on one side of the dry mixing chamber (7) and is inclined, with the inclined surface of the mounting plate (6) facing the material discharge hole (16).

8. A concrete raw material mixing device according to claim 1, characterized in that: The material conveying assembly (2) includes several screw conveyors (31) set on the top of the mixing tank (1) and a conveying pump (32) set on the side of the mixing tank (1) for conveying materials into the wet mixing chamber (8).

9. A concrete raw material mixing device according to claim 1, characterized in that: The discharge assembly (3) includes a discharge pipe (33) located at the bottom of the mixing tank (1) and connected to the inner cavity of the wet mixing chamber (8), and a valve (34) located on the discharge pipe (33).

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