Concrete pouring slurry transfer device

Abstract

The utility model discloses a concrete pouring slurry transfer device which comprises a buffer hopper and a conveying cylinder, the buffer hopper is located at the top end of the conveying cylinder, a shell is arranged between the buffer hopper and the conveying cylinder, a control mechanism used for controlling the flow of pouring slurry is arranged in the shell, and a mixing chamber and a transfer chamber are arranged in the conveying cylinder. The transfer chamber is located at the lower end of the mixing chamber, and a through groove is formed between the transfer chamber and the mixing chamber; anti-segregation mechanisms are arranged in the mixing chamber and the transfer chamber. According to the concrete pouring slurry transfer device, a slurry flowing path is prolonged through a gradual shrinking structure, aggregate and slurry are naturally extruded through gravity to be preliminarily mixed, local segregation caused by initial accumulation is reduced, the flow guide plate controls the discharging flow speed through the sliding opening degree, and inertial separation caused by high-speed flowing is restrained; the situation that aggregate breaks through a slurry wrapping layer due to too large kinetic energy is avoided, a bidirectional shearing force field is formed between the scraping plate and the inner wall in the mixing chamber, caked aggregate is beaten, the slurry wrapping layer is updated, and the aggregate sinking track is damaged is avoided.

Description

Technical Field

[0001] This utility model relates to the field of concrete technology, specifically to a concrete pouring slurry transfer device. Background Technology

[0002] Most concrete pouring slurry transfer devices are fixed conveyors (such as handcarts and electric dump trucks). However, traditional structures lack anti-segregation design, leading to aggregate separation. There are two main reasons for this: firstly, when concrete is transferred over long distances or vertically, gravity causes the aggregate to sink and the slurry to float, forming stratification and thus causing segregation; secondly, excessive flow rate causes the aggregate to separate from the cement slurry. Therefore, a concrete pouring slurry transfer device is needed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a concrete pouring slurry transfer device to solve the problem of segregation that easily occurs during the transfer of concrete pouring slurry as mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a concrete pouring slurry transfer device, comprising a buffer hopper and a conveying cylinder, wherein the buffer hopper is located at the top of the conveying cylinder, a shell is provided between the buffer hopper and the conveying cylinder, and a control mechanism for controlling the flow rate of the pouring slurry is provided inside the shell, and a mixing chamber and a transfer chamber are respectively provided inside the conveying cylinder, wherein the transfer chamber is located at the lower end of the mixing chamber, and a through groove is provided between the transfer chamber and the mixing chamber;

[0005] The mixing chamber and transfer chamber are equipped with anti-segregation mechanisms.

[0006] As a preferred technical solution of this utility model, the control mechanism includes a guide plate and a screw handle, one end of the screw handle is movably connected to the guide plate, and the screw handle is threadedly connected to the housing.

[0007] As a preferred technical solution of this utility model, one end of the guide plate has an inclined structure, and the surface of the guide plate is provided with a wear-resistant coating.

[0008] As a preferred technical solution of this utility model, the upper and lower ends of the shell are hollow, and guide rails are symmetrically arranged inside the shell. The guide rails are V-shaped, and the flat ends of the guide rails are in contact with the inner wall of the shell.

[0009] As a preferred technical solution of this utility model, the guide plate has a groove inside that slides and cooperates with the guide rail.

[0010] As a preferred technical solution of this utility model, the anti-segregation mechanism includes a motor, a connecting shaft, a scraper and a pusher. The scraper and pusher are disposed on the outer surface of the connecting shaft. One end of the connecting shaft is connected to the output end of the motor, and the other end of the connecting shaft is movably inserted into the mixing chamber and the transfer chamber.

[0011] As a preferred technical solution of this utility model, a guide groove is provided inside the transfer chamber, and the gap between the push plate and the inner wall of the transfer chamber is ≤1mm.

[0012] As a preferred technical solution of this utility model, one end of the scraper (10) is attached to the inner wall of the mixing chamber (12) and rotates.

[0013] Compared with the prior art, the beneficial effects of this utility model concrete pouring slurry transfer device are:

[0014] The slurry flow path is extended by a tapered structure, and the aggregate and slurry are initially mixed by gravity natural compression, reducing local segregation caused by initial accumulation. The guide plate controls the feed rate by sliding opening and closing, suppressing inertial separation caused by high-speed flow and preventing aggregate from breaking through the slurry coating layer due to excessive kinetic energy. The scraper and inner wall in the mixing chamber form a bidirectional shear force field, which breaks up the agglomerated aggregate and renews the slurry coating layer, disrupting the aggregate sinking trajectory. The through channel at the bottom of the mixing chamber restricts the aggregate particle size, and oversized particles are pushed back to the mixing zone by the reverse scraper to redisperse, ensuring the uniformity of the fed aggregate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the buffer hopper and shell of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the overall internal side view of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the conveying cylinder of this utility model;

[0019] Figure 5 This is a schematic diagram of the overall internal cross-sectional structure of this utility model.

[0020] In the diagram: 1. Buffer hopper; 2. Shell; 3. Conveying cylinder; 4. Guide plate; 5. Screw handle; 6. Slide groove; 7. Guide rail; 8. Motor; 9. Connecting shaft; 10. Scraper; 11. Push plate; 12. Mixing chamber; 13. Transfer chamber; 14. Guide groove; 15. Through groove. Detailed Implementation

[0021] Please see Figure 1-5This utility model provides a technical solution: a concrete pouring slurry transfer device, including a buffer hopper 1 and a conveying cylinder 3, wherein the buffer hopper 1 is located at the top of the conveying cylinder 3, characterized in that: a shell 2 is provided between the buffer hopper 1 and the conveying cylinder 3, and a control mechanism for controlling the flow rate of the pouring slurry is provided inside the shell 2; a mixing chamber 12 and a transfer chamber 13 are respectively provided inside the conveying cylinder 3, the transfer chamber 13 is located at the lower end of the mixing chamber 12, and a through groove 15 is opened between the transfer chamber 13 and the mixing chamber 12;

[0022] The mixing chamber 12 and the transfer chamber 13 are equipped with anti-segregation mechanisms.

[0023] The overall structure is a hanging tank. The buffer hopper 1 stores the slurry in a static manner. The interior of the buffer hopper 1 is a conical structure, which is wider at the top and narrower at the bottom. This structure can guide the flow of the slurry and reduce its flow rate. The slurry consists of cement slurry and aggregate. The size of the gap between the buffer hopper 1 and the conveying cylinder 3 is adjusted according to the discharge speed. The screw handle 5 is threaded through the housing 2 and pushes the guide plate 4 to slide along the guide rail 7. The guide plate 4 controls the opening distance between the buffer hopper 1 and the conveying cylinder 3 by sliding, or completely covers the bottom of the buffer hopper 1 to avoid the aggregate and cement slurry segregation due to excessive flow rate, and also to avoid blockage due to excessively slow flow rate.

[0024] The slurry flows along the guide plate 4 into the mixing chamber 12 inside the conveying cylinder 3. The top of the mixing chamber 12 has a hollow structure. The mixing chamber 12, together with the internal rotating scraper 10, can stir the slurry. Combined with the internal structure of the shell 2, it can achieve a two-stage slurry inhibition structure, so that the slurry can be better mixed and blockage inside the conveying cylinder 3 can be avoided.

[0025] The length of scraper 10 is the same as the length of mixing chamber 12, but the length of mixing chamber 12 is not the same as the length of conveying cylinder 3. The length of conveying cylinder 3 is much greater than the length of mixing chamber 12. The outer wall and bottom of scraper 10 are attached to the bottom partition of mixing chamber 12. On the one hand, it can reduce the scaling of slurry inside mixing chamber 12 and achieve the cleaning effect. On the other hand, it can quantitatively guide the slurry inside mixing chamber 12 and discharge it into the transfer chamber 13 through the through groove 15 of the partition.

[0026] Motor 8 controls the linkage shaft 9 to drive scraper 10 and pusher 11 to rotate. Pusher 11 transfers slurry by rotating inside transfer chamber 13. The overall transfer mechanism can be set with a certain degree of inclination. The inclined surface of guide channel 14 in transfer chamber 13 faces downward, so that slurry flows out from guide channel 14. The guide channel 14 is distributed in a ring. The surface of the multiple guide channels 14 is relatively smooth, which can guide and discharge slurry.

[0027] Through the tapered structure of the inverted conical buffer hopper 1, gravity naturally guides the flow, initially balancing the distribution of aggregate and slurry, reducing the risk of local segregation caused by initial accumulation. The dynamic opening and closing of the adjustable guide plate 4 controls the flow rate of slurry into the mixing chamber 12, avoiding inertial separation caused by high-speed flow. The rotating scraper 10 and baffles within the mixing chamber 12 create a shearing action, breaking up agglomerated aggregate and redistributing the slurry coating. The pusher plate 11 and guide channel 14 in the transfer chamber 13 work together to guide and reintegrate the mixed slurry into layers, counteracting the natural stratification effect during flow. The inverted conical guiding motion, within the tapered buffer hopper 1... The wall guides the slurry to flow from a wide cross section to a narrow cross section. During this process, the aggregate generates lateral extrusion force due to the cross section contraction, forming a preliminary mixture with the slurry. At the same time, the narrowing path prolongs the flow time, causing the gravity difference between the aggregate and the slurry to be partially offset in the buffer stage. The guide plate 4 slides and inhibits the flow. The guide plate 4 slides along the guide rail 7 through the screw handle 5, changing the opening degree of the hopper outlet. When the opening degree decreases, the slurry flow cross-sectional area decreases and the flow velocity decreases. The aggregate is difficult to break through the slurry coating layer due to insufficient kinetic energy. Conversely, when the opening degree increases, the slurry is released smoothly at a controllable flow velocity, avoiding shear separation caused by sudden changes in flow rate. The scraper 10 shears and mixes.

[0028] Motor 8 drives the linkage shaft 9 to rotate the scraper 10. The outer edge of the scraper 10 forms a tight fit with the inner wall of the mixing chamber 12. During rotation, the leading edge of the scraper 10 applies a positive thrust to the slurry, forcing the aggregate and slurry to move forward. The gap between the trailing edge and the inner wall generates a reverse adsorption force, peeling off the aggregate close to the wall and throwing it back into the mixing zone. This bidirectional action forms a circulating shear flow, disrupting the aggregate's settling trajectory. Pusher 11 guides the flow in layers. The pusher 11 in the transfer chamber 13 rotates with the linkage shaft 9, pushing the mixed slurry into layers according to density to the guide channel 14. The guide channel 14 stabilizes the flow with eddy currents. The inner wall of the guide channel 14 is designed with spiral ribs, which guide the slurry as it flows through. The rotating vortex creates a negative pressure zone at its center, forcing the aggregate to suspend in the slurry coating layer. The high-speed zone on the outside inhibits aggregate deposition on the tank wall through centrifugal force. The vortex intensity is linked to the inclination angle of the guide channel 14 to adapt to horizontal, inclined and vertical conveying requirements. The aggregate suspension is maintained. The shear force generated by the rotation of the scraper 10 and the lift force of the vortex in the guide channel 14 work together to form a vertical force balance. When the aggregate sinks due to gravity, the shear force disperses it laterally, while the lift force of the vortex provides reverse support, forcing the aggregate to remain suspended under the slurry coating. The mechanical stirring in the mixing chamber 12 continuously renews the slurry coating layer on the surface of the aggregate, preventing the aggregate from being exposed due to slurry loss.

[0029] The spiral flow channel of the guide channel 14 further extends the contact path between the slurry and the aggregate, enhancing the encapsulation stability. By adjusting the opening and closing degree of the guide plate 4, the axial flow velocity of the slurry entering the mixing chamber 12 is controlled below the critical value. When the flow velocity is below the critical value, the aggregate settling rate is significantly reduced, the slurry viscous resistance dominates, and radial vortex disturbance is caused by the radial vortex induced by the spiral ribs of the guide channel 14. This vortex applies a disturbance perpendicular to the flow direction to the slurry. Under the action of the vortex, the aggregate moves forward in a spiral motion and cannot sink along a straight trajectory, thereby disrupting the stratification trend and remixing in stages.

[0030] After the transfer chamber 13 pusher plate 11 guides the slurry into layers according to density, the slurry of different density layers collide at the outlet of the guide channel 14 due to the difference in flow velocity, forming a local turbulent zone. The disordered movement in the turbulent zone causes the aggregate and slurry to redistribute, realizing dynamic remixing after stratification. From the buffer hopper 1 to the outlet of the guide channel 14, the device passes through four segregation intervention nodes: buffer guidance, shear mixing, stratification guidance and turbulent remixing, forming a progressive segregation blocking structure to ensure the uniformity of the final output slurry.

Claims

1. A concrete pouring slurry transfer device, comprising a buffer hopper (1) and a conveying cylinder (3), wherein the buffer hopper (1) is located at the top of the conveying cylinder (3), characterized in that: A housing (2) is provided between the buffer hopper (1) and the conveying cylinder (3). The housing (2) is provided with a control mechanism for controlling the flow rate of the slurry. The conveying cylinder (3) is provided with a mixing chamber (12) and a transfer chamber (13). The transfer chamber (13) is located at the lower end of the mixing chamber (12), and a through groove (15) is provided between the transfer chamber (13) and the mixing chamber (12). The mixing chamber (12) and the transfer chamber (13) are equipped with anti-segregation mechanisms.

2. A concrete placement paste transfer device according to claim 1, wherein: The control mechanism includes a guide plate (4) and a screw handle (5). One end of the screw handle (5) is movably connected to the guide plate (4), and the screw handle (5) is threadedly connected to the housing (2).

3. A concrete placement paste transfer device according to claim 2, wherein: The surface of the guide plate (4) is inclined at one end, and the surface of the guide plate (4) is provided with a wear-resistant coating.

4. A concrete placement paste transfer device according to claim 1, wherein: The shell (2) has a hollow structure at both the top and bottom. The shell (2) is symmetrically equipped with guide rails (7). The guide rails (7) have a "V" shape and the flat end of the guide rails (7) is in contact with the inner wall of the shell (2).

5. A concrete placement paste transfer device according to claim 2, wherein: The guide plate (4) has a groove (6) inside which slides and engages with the guide rail (7).

6. A concrete placement paste transfer device according to claim 1, wherein: The anti-segregation mechanism includes a motor (8), a connecting shaft (9), a scraper (10) and a pusher (11). The scraper (10) and the pusher (11) are located on the outer surface of the connecting shaft (9). One end of the connecting shaft (9) is connected to the output end of the motor (8), and the other end of the connecting shaft (9) is movably inserted into the mixing chamber (12) and the transfer chamber (13).

7. A concrete placement paste transfer device as defined in claim 1, wherein: The transfer chamber (13) has a guide channel (14) inside, and the gap between the transfer chamber (13) and the inner wall of the push plate (11) is ≤1mm.

8. A concrete placement paste transfer device according to claim 6, wherein: The scraper (10) rotates with one end attached to the inner wall of the mixing chamber (12).

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