Polyurethane concrete mixing, placing, vibrating and leveling integrated machine

Abstract

The application relates to a polyurethane concrete mixing, distributing, vibrating and leveling integrated machine, and belongs to the technical field of concrete construction equipment. The machine comprises a rack with a walking mechanism, a mixing bin, a buffer distributing bin and a rubbing device arranged on the rack. A hydraulic mixing system is arranged in the mixing bin and used for mixing polyurethane concrete. A hydraulic control bin door is arranged at the bottom of the mixing bin. The buffer distributing bin is arranged below the mixing bin. The mixing bin is communicated with the buffer distributing bin through the hydraulic control bin door. A hydraulic rotating forced discharging device is arranged in the buffer distributing bin and used for uniformly distributing polyurethane concrete in an expansion joint anchoring area. The rubbing device is arranged behind the buffer distributing bin and used for vibrating and rubbing the polyurethane concrete in the anchoring area. The application realizes efficient construction of the expansion joint, greatly improves the construction efficiency and guarantees the construction quality.

Description

Technical Field

[0001] This invention relates to an integrated machine for mixing, placing, vibrating, and leveling polyurethane concrete, belonging to the technical field of concrete construction equipment. Background Technology

[0002] Expansion joints are installed between the ends of two bridge beams or between the beam end and the abutment to accommodate the expansion and contraction of the bridge structure caused by temperature changes, concrete shrinkage and creep, and vehicle loads. Traditionally, the concrete in the anchorage zone of expansion joints is poured using cement-based concrete or steel fiber reinforced concrete. The relevant construction equipment is relatively mature, and the process typically involves centralized mixing at a general-purpose batching plant, transportation by concrete truck, and manual pouring and compaction using small vibratory tools. This results in a dispersed construction process and complex equipment requirements.

[0003] In recent years, polyurethane concrete has begun to be used as a new type of building material in the field of bridge expansion joints. Polyurethane concrete is composed of a two-component polyurethane binder and aggregate. Its curing reaction is extremely sensitive to mixing time and uniformity; insufficient mixing or excessive mixing time will affect the material's properties. Furthermore, polyurethane concrete has a relatively short applicable construction period; once this time window is exceeded, the material begins to harden, and work cannot continue. Expansion joints have a special structural design, and currently there is no dedicated polyurethane concrete construction equipment for them. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated polyurethane concrete mixing, placement, vibration, and leveling machine to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A polyurethane concrete mixing, placing, vibrating, and leveling integrated machine includes a frame with a traveling mechanism, and a mixing chamber, a buffer placing chamber, and a concrete surface treatment device mounted on the frame. The mixing chamber contains mixing blades for mixing the polyurethane concrete. A gate at the bottom of the mixing chamber controls the discharge rate. A buffer placing chamber is located below the mixing chamber. A rotating discharge device within the buffer placing chamber is used to evenly distribute the polyurethane concrete in the expansion joint anchorage zone. The concrete surface treatment device is located behind the buffer placing chamber and is used to vibrate and compact the polyurethane concrete in the anchorage zone. The frame is mounted on the traveling mechanism via a lifting mechanism. The expansion joint is transverse in length, and the road surface extends longitudinally.

[0006] A further improvement to the technical solution of the present invention is that a hydraulic stirring system is provided in the stirring chamber, the hydraulic stirring system including a stirring shaft, stirring blades arranged on the stirring shaft, and a hydraulic motor for driving the stirring shaft to rotate.

[0007] A further improvement to the technical solution of the present invention is as follows: the rotary feeding device includes a feeding shaft arranged longitudinally along the buffer material bin, a plurality of feeding blades arranged on the feeding shaft, and a hydraulic motor that drives the feeding shaft to rotate; the feeding blades push the polyurethane concrete downwards.

[0008] A further improvement to the technical solution of the present invention is as follows: the concrete surface treatment device includes a rubbing mechanism, which includes a rubbing bracket, a rubbing motor, and a rubbing panel; the rubbing motor is fixed on the rubbing bracket, and the rubbing panel is slidably disposed on the rubbing bracket and driven by the rubbing motor to perform planar reciprocating movement for rubbing.

[0009] A further improvement to the technical solution of the present invention is as follows: a crank-slider mechanism is used to connect and drive the dough kneading motor and the dough kneading board; a crank plate is fixedly installed on the output shaft of the dough kneading motor, and the dough kneading board is fixedly installed on the slider plate. The slider plate is slidably installed on the sliding track of the dough kneading bracket; the crank plate and the slider plate are connected by a connecting rod hinge.

[0010] A further improvement to the technical solution of the present invention is that the concrete surface treatment device further includes a vibration compaction mechanism disposed behind the surface rubbing mechanism; the vibration compaction mechanism includes a vibrating plate and a vibration motor for driving the vibrating plate.

[0011] A further improvement to the technical solution of the present invention is as follows: the buffer material hopper and the concrete surface treatment device are mounted on the telescopic frame; the telescopic frame is slidably mounted on the slide bar at the bottom of the frame, and a telescopic adjustment cylinder is provided between the telescopic frame and the frame; the telescopic frame moves and adjusts its position in the longitudinal direction.

[0012] A further improvement to the technical solution of the present invention is that two sets of buffer material bins and concrete surface treatment devices are provided and are set at longitudinal intervals on the telescopic frame.

[0013] A further improvement to the technical solution of the present invention is that the walking mechanism is a walking wheel located at the bottom of the frame and driven by a motor; the walking wheel can rotate and turn.

[0014] A further improvement to the technical solution of the present invention is that a hydraulic oil tank and a hydraulic pump are also provided; the working power is provided through a hydraulic system.

[0015] Due to the adoption of the above technical solution, the technical effects achieved by this invention are as follows: This invention is an integrated specialized device for the construction of polyurethane concrete in the anchorage zone of expansion joints. It integrates mixing, spreading, troweling, and vibration compaction functions into one unit. The overall width of the machine is matched to the construction width of the expansion joint anchorage zone, allowing it to move directly above the expansion joint along the longitudinal direction. Specifically designed for on-site construction of polyurethane concrete in expansion joints, this integrated construction method improves efficiency and quality.

[0016] This invention employs a hydraulic mixing system driven by a high-power hydraulic motor within the mixing chamber. Both the mixing shaft and the mixing blades are made of high-strength alloy steel, possessing significant structural strength and resistance to bending and torsion. This provides sufficient driving force and mixing intensity to ensure that the polyurethane concrete is thoroughly and evenly mixed within the mixing chamber, achieving uniform mixing of all components. This meets the requirements for construction of the expansion joint anchorage zone, repeatedly utilizing the performance of the polyurethane concrete and improving the quality of the expansion joint.

[0017] This invention features a buffer distribution silo below the mixing chamber. Inside the buffer distribution silo is a rotary feeding device driven by a hydraulic motor. This device forcefully pushes the polyurethane concrete downwards, preventing clogging and bridging within the silo and ensuring continuous and uniform discharge of material from the outlet at the bottom of the silo, spreading it across the expansion joint anchorage area. The rotary feeding device allows for control of the feeding speed and quantity by adjusting the rotational speed of the feeding shaft, ensuring uniform distribution of the polyurethane concrete across the width of the expansion joint anchorage area, facilitating subsequent construction.

[0018] This invention relates to a concrete surface treatment device that integrates a rubbing mechanism and a vibratory compaction mechanism. The rubbing mechanism uses a crank-slider structure to convert the rotational motion of the rubbing motor into the high-frequency reciprocating motion of the rubbing plate, achieving rubbing treatment of the polyurethane concrete surface in the expansion joint anchorage zone. This results in a uniform and smooth rubbing effect, ensuring a smooth transition between the expansion joint anchorage zone and the road base. Simultaneously, the reciprocating frequency of the rubbing plate can be adjusted to adapt to the rubbing requirements of polyurethane concrete with different initial setting rates and vibratory ...

[0019] This invention mounts a buffer concrete hopper and a concrete surface treatment device on a telescopic frame. The telescopic frame is slidably mounted on a sliding rod at the bottom of the machine frame and is driven to slide longitudinally by a telescopic adjustment cylinder. The material feeding position and the longitudinal position of the surface-rubbing mechanism and the vibratory compaction mechanism relative to the expansion joint anchorage zone can be precisely adjusted according to the actual location of the expansion joint on the road surface. This ensures that the discharge port of the buffer concrete hopper is accurately aligned with the anchorage zone, and that the working areas of the surface-rubbing panel and the vibratory plate accurately cover the anchorage zone. This achieves precise positioning and construction of the expansion joint anchorage zone, guaranteeing consistent construction throughout the entire length of the anchorage zone.

[0020] This invention integrates mixing, spreading, troweling, and vibration compaction modules onto a single machine. The entire machine travels longitudinally above the expansion joint via a walking mechanism, completing all processes—mixing, spreading, troweling, and vibration leveling—of the polyurethane concrete in the expansion joint anchorage zone in a single pass, significantly improving construction efficiency. The walking wheels are equipped with independent steering mechanisms, enabling the machine to flexibly adjust its direction of travel on-site, adapting to the continuous operation requirements along different directions of the expansion joint.

[0021] The invention features two sets of buffer material placement bins and concrete surface treatment devices spaced longitudinally on the telescopic frame. The longitudinal spacing between the two sets of devices matches the construction width of the expansion joint anchorage zone in the road extension direction. During operation, the integrated machine can simultaneously perform material placement and surface treatment on both sides of the longitudinal expansion joint, completing construction on both sides of the expansion joint in a single pass, further improving construction efficiency.

[0022] The invention uses a hydraulic system to provide working power. The hydraulic system has high control precision, fast response speed and large output power, which can well match the high requirements of polyurethane concrete construction for expansion joints in terms of mixing power, feeding power and vibration power. At the same time, each hydraulic actuator is independently controlled through the control valve group, which makes the operation flexible and convenient. The direction, speed and pressure of each working part can be precisely adjusted, ensuring the coordinated cooperation and stable operation of each process of the whole machine. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the construction of this invention; Figure 3 This is the front view of the present invention; Figure 4 This is a schematic diagram of the telescopic frame, mixing chamber, and concrete surface treatment device of the present invention; Figure 5 This is a schematic diagram of the dough-rolling mechanism of the present invention; Figure 6 This is a schematic diagram of the mixing chamber of the present invention; Figure 7 This is a schematic diagram of the rotary feeding device of the present invention. The components are as follows: 1. Frame, 2. Mixing bin, 3. Walking wheels, 4. Buffer material distribution bin, 5. Mixing blades, 6. Telescopic adjustment cylinder, 7. Discharge shaft, 8. Discharge blades, 9. Dough kneading motor, 10. Dough kneading bracket, 11. Crank plate, 12. Sliding plate, 13. Connecting rod, 14. Dough kneading panel, 15. Telescopic frame, 16. Vibrating plate, 17. Vibrating motor, 18. Sliding track, 19. Slide rod. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] This invention is an integrated polyurethane concrete mixing, spreading, vibrating, and leveling machine. It is an integrated construction equipment for mixing, spreading, vibrating, and leveling polyurethane concrete, and is especially suitable for polyurethane concrete construction of bridge expansion joints.

[0028] The following definition uses the length direction of the expansion joint as the transverse direction, i.e., the road width direction, and the extension direction of the road surface as the longitudinal direction, i.e., the vehicle travel direction.

[0029] like Figures 1-7 As shown, the equipment mainly includes a frame 1, a mixing chamber 2, a traveling mechanism, a buffer concrete placing hopper 4, and a concrete surface treatment device. The frame 1 serves as the support for the entire machine, welded from high-strength steel, possessing sufficient structural strength and rigidity. The various components of the equipment are mounted on this frame. The traveling mechanism drives the entire machine. The frame 1 is mounted on the traveling mechanism 3 via a lifting mechanism. The overall height of the frame 1 can be adjusted according to construction needs, thereby adjusting the height of the mixing chamber 2, the buffer concrete placing hopper 4, and the concrete surface treatment device relative to the anchorage area construction surface. The lifting mechanism can employ a hydraulic cylinder or a screw jack.

[0030] The walking mechanism consists of four walking wheels 3 located at the bottom of the frame 1 and driven by a motor. The walking wheels 3 are preferably made of rubber. The walking wheels 3 can rotate and turn, allowing the machine to flexibly adjust its direction of travel on the construction site, facilitating continuous operation along the expansion joint anchorage area. The walking wheels 3 are powered by a walking drive motor, which is connected to the walking wheels 3 through a reduction transmission mechanism, enabling the machine to walk on its own without the need for external traction equipment.

[0031] The mixing chamber 2 is used for mixing polyurethane concrete and is fixedly mounted on the frame 1. The mixing chamber 2 has an open-top box structure for easy loading of polyurethane concrete raw materials. An agitator shaft is installed inside the mixing chamber 2, with several agitator blades 5 fixedly mounted on it. The agitator shaft is driven by a hydraulic motor to rotate, forming a hydraulic mixing system. Compared with ordinary cement concrete, polyurethane concrete has higher viscosity, poorer fluidity, and faster initial setting speed, requiring higher driving force and mixing intensity from the mixing system. Therefore, both the agitator shaft and the agitator blades 5 are made of high-strength alloy steel, possessing greater structural strength and resistance to bending and torsion, capable of withstanding the large torque load generated during the mixing process. The hydraulic motor driving the agitator shaft is a high-power hydraulic motor, providing sufficient driving force to ensure that the polyurethane concrete is thoroughly and evenly mixed within the mixing chamber 2. The mixing blades 5 are spaced apart along the axial direction on the mixing shaft, and the adjacent mixing blades 5 are staggered at a certain angle to enhance the mixing effect. The mixing blades 5 are made of wear-resistant alloy material, and their surface is hardened to have a long service life. The blade shape of the mixing blades 5 can be set as a plow shape, which can generate strong shearing, turning and pushing action on the polyurethane concrete during rotation to ensure that the components are fully and evenly mixed.

[0032] The bottom of the mixing bin 2 is equipped with a bin door, which is controlled by a hydraulic telescopic rod to control the opening and closing degree, thereby controlling the amount of material discharged. The bin door is opened or closed by a hydraulic cylinder, and the piston rod of the hydraulic cylinder is hinged to the bin door. The action of the cylinder is controlled by the control valve group of the hydraulic system. The operator can adjust the opening degree of the bin door in real time according to the material level in the buffer hopper 4 and the construction speed requirements, so as to accurately control the amount of polyurethane concrete falling from the mixing bin 2 into the buffer hopper 4, avoiding material accumulation and blockage in the buffer hopper 4 due to excessive discharge, or material interruption due to insufficient discharge.

[0033] A buffer hopper 4 is installed below the mixing chamber 2. The buffer hopper 4 is fixedly mounted on the frame 1, with its inlet facing the outlet of the mixing chamber 2. It receives the uniformly mixed polyurethane concrete discharged from the mixing chamber 2 and serves as temporary storage and buffer for the concrete distribution. The buffer hopper 4 has a conical or trapezoidal box structure, wider at the top and narrower at the bottom, facilitating the downward accumulation of the polyurethane concrete under gravity. A rotating discharge device is installed inside the buffer hopper 4 to press the polyurethane concrete 5 downwards and discharge it from the inside, ensuring even distribution of the polyurethane concrete within the expansion joint anchorage area.

[0034] The rotary feeding device includes a feeding shaft 7 arranged longitudinally along the buffer material distribution bin 4, several feeding blades 8 mounted on the feeding shaft 7, and a hydraulic motor that drives the feeding shaft 7 to rotate. The feeding shaft 7 is arranged longitudinally, i.e., along the road surface extension direction, consistent with the travel direction of the traveling mechanism 3. Both ends of the feeding shaft 7 are rotatably supported on the side wall of the buffer material distribution bin 4 via bearing seats. A sealing structure is provided inside the bearing seats to prevent polyurethane concrete from entering the bearing and causing wear. The feeding shaft 7 is also made of high-strength alloy steel, possessing sufficient structural strength to withstand the extrusion and shearing forces of the polyurethane concrete. The feeding blades 8 are fixedly mounted on the feeding shaft 7. The feeding blades 8 are typically rectangular and evenly spaced at equal intervals around the feeding shaft 7. These blades forcefully push the polyurethane concrete downwards. Because polyurethane concrete has high viscosity and poor fluidity, it is difficult to feed smoothly using only the feeding blades. Therefore, the forced pushing by the feeding blades 8 effectively prevents blockage and bridging of the polyurethane concrete in the buffer hopper 4, ensuring that the material is continuously and evenly discharged from the bottom outlet of the buffer hopper 4 and spread in the expansion joint anchoring area. The rotation speed of the feeding shaft 7 is controlled by a hydraulic motor through a hydraulic system. Operators can adjust the rotation speed of the feeding shaft 7 in real time according to the construction speed and material distribution requirements, thereby controlling the feeding speed and material distribution uniformity. An adjustable scraper can also be installed at the bottom outlet of the buffer hopper 4 to control the material thickness and uniformity.

[0035] In the specific implementation, both the buffer material bin 4 and the concrete surface treatment device are mounted on the telescopic frame 15. The telescopic frame 15 can move relative to the frame 1. The telescopic frame 15 is a rectangular frame structure, welded from steel profiles, possessing sufficient structural strength and rigidity. The telescopic frame 15 is slidably mounted on a slide rod 19 located at the lower part of the frame 1. The slide rod 19 is arranged horizontally along the longitudinal direction and fixedly connected to the lower part of the frame 1. A telescopic adjustment cylinder 6 is installed between the telescopic frame 15 and the frame 1. The cylinder body of the telescopic adjustment cylinder 6 is fixedly connected to the frame 1, and the piston rod is fixedly connected to the telescopic frame 15. Through the telescopic movement of the telescopic adjustment cylinder 6, the telescopic frame 15 is driven to slide longitudinally on the slide rod 19, thereby adjusting the longitudinal position of the telescopic frame 15 relative to the frame 1. The expansion frame 15 is equipped with a buffer material bin 4 and a concrete surface treatment device. By adjusting the longitudinal position of the expansion frame 15, the material feeding position of the buffer material bin 4 and the longitudinal position of the concrete surface treatment device relative to the expansion joint anchorage area are adjusted. The purpose of this longitudinal position adjustment function is to accurately adjust the material feeding position and the vibration and rubbing position according to the actual position of the expansion joint on the road surface during construction, so that the outlet of the buffer material bin 4 is accurately aligned with the anchorage area, and the working area of ​​the concrete surface treatment device accurately covers the anchorage area, ensuring precise construction of the construction area.

[0036] Preferably, the telescopic frame 15 is provided with two sets of buffer material placement bins 4 and concrete surface treatment devices at longitudinal intervals. The longitudinal spacing of the two sets of devices matches the construction width of the expansion joint anchorage zone in the road extension direction. By setting two independent material placement and surface treatment units, the integrated machine can simultaneously perform material placement and surface treatment operations on two different positions on the longitudinal front and rear sides of the expansion joint during the movement process, thereby improving construction efficiency.

[0037] A conveying cylinder can also be installed on the telescopic frame 15. The upper opening of the conveying cylinder is larger and aligned with the door of the mixing bin 2, while the lower opening is smaller and aligned with the buffer distribution bin. This is to ensure that the polyurethane concrete in the mixing bin 2 enters the buffer distribution bin more accurately.

[0038] The concrete surface treatment device of this integrated machine is used to vibrate and rub the polyurethane concrete laid in the anchoring area, making the polyurethane concrete surface dense, flat, and smooth. The concrete surface treatment device is located behind the buffer material hopper 4, that is, behind the side along the transverse travel direction of the traveling mechanism 3. The concrete surface treatment device mainly includes a rubbing mechanism, which realizes the vibration, rubbing, and leveling treatment. The rubbing mechanism includes a rubbing bracket 10, a rubbing motor 9, and a rubbing plate 14. The rubbing bracket 10 is the main support of the rubbing mechanism, which is fixedly set on the telescopic frame 15 and moves and adjusts longitudinally together with the telescopic frame 15. The rubbing motor 9 is fixedly installed on the upper part of the rubbing bracket 10. The rubbing motor 9 is preferably a variable frequency speed control motor, which can adjust the rubbing frequency and speed according to the construction needs. The rubbing plate 14 is a flat structure with a smooth working surface on the bottom, which is used to contact the polyurethane concrete surface for rubbing operations. The rubbing plate 14 is made of wear-resistant steel. The dough-rubbing board 14 is slidably mounted on the dough-rubbing bracket 10 and is driven by the dough-rubbing motor 9 to move back and forth in a planar manner to rub the dough.

[0039] Specifically, the dough-rubbing motor 9 and the dough-rubbing plate 14 are connected and driven by a crank-slider mechanism to achieve reciprocating linear movement for dough-rubbing. A crank plate 11 is fixedly mounted on the output shaft of the dough-rubbing motor 9, and a hinge shaft is set on the crank plate 11 at a distance offset from the output shaft. The dough-rubbing plate 14 is fixedly mounted on the slider plate 12, and the slider plate 12 is slidably mounted on the sliding rail 18 of the dough-rubbing bracket 10. The sliding rail 18 is arranged horizontally in the longitudinal direction, providing limit and guidance for the movement of the slider plate 12. The crank plate 11 and the slider plate 12 are hinged together by a connecting rod 13. One end of the connecting rod 13 is hinged to the eccentric hinge shaft of the crank plate 11, and the other end is hinged to the hinge seat on the slider plate 12. When the output shaft of the rubbing motor 9 rotates, it drives the crank plate 11 to rotate. The crank plate 11 converts the rotational motion into the reciprocating movement of the slider plate 12 along the plane of the sliding track 18 through the connecting rod 13. This, in turn, drives the rubbing panel 14 to perform high-frequency planar reciprocating rubbing. Because the slider plate 12 is limited and guided by the sliding track 18, the rubbing panel 14 always moves linearly in the horizontal plane, ensuring that the rubbing panel 14 applies a planar rubbing force to the polyurethane concrete surface, which is beneficial for obtaining a uniform and smooth rubbing effect. The output shaft speed of the rubbing motor 9 is adjusted by a frequency converter, so that the reciprocating frequency of the rubbing panel 14 is adjustable to adapt to the rubbing construction requirements of polyurethane concrete with different initial setting speeds and viscosities.

[0040] In practical implementation, the concrete surface treatment device also includes a vibratory compaction mechanism located behind the surface-rubbing mechanism. The vibratory compaction mechanism mainly comprises a vibratory plate 16 and a vibratory motor 17 that drives the vibratory plate 16. The vibratory plate 16 is a flat plate structure and is suspended on the telescopic frame 15 via elastic suspension. The vibratory compaction mechanism is located behind the surface-rubbing mechanism. The vibratory motor 17 drives the vibratory plate 16 to vibrate at high frequency via an eccentric block. The vibratory motor 17 is a high-frequency vibratory motor, and an eccentric block is installed on its output shaft. When the vibratory motor 17 rotates, the eccentric block drives the vibratory plate 16 to generate high-frequency vibration. Under the vibration action, the vibratory plate 16 further vibrates and compacts the already surface-rubbled polyurethane concrete, causing air bubbles inside the polyurethane concrete to be expelled, further densifying the aggregate, and improving the density and surface strength of the concrete. The elastic suspension device includes several springs or rubber damping blocks, which are set between the vibrating plate 16 and the telescopic frame 15. This ensures that the vibrating plate 16 can effectively transfer the vibration energy to the polyurethane concrete, and also isolates the transmission of vibration to the telescopic frame 15 and the frame 1, thereby reducing the adverse effects of vibration on other parts of the machine.

[0041] The integrated machine of this invention is also equipped with a hydraulic oil tank and a hydraulic pump. The hydraulic system provides working power to each working component. The hydraulic system includes a hydraulic oil tank, a hydraulic pump, a control valve group, hydraulic pipelines, and various actuating hydraulic components such as the hydraulic motor of the mixing chamber, the hydraulic motor of the feeding shaft, the chamber door drive cylinder, the hydraulic cylinder of the lifting mechanism, and the telescopic adjustment cylinder 6. The hydraulic pump is driven by an independent hydraulic pump drive motor, which draws hydraulic oil from the hydraulic oil tank. After being regulated and distributed by the control valve group, the hydraulic oil with a certain pressure and flow rate is delivered to each actuating hydraulic component to drive its operation. The control valve group includes directional valves, throttle valves, and relief valves, which are used to control the direction, speed, and pressure of each actuating component to achieve precise control of each working component.

[0042] The working principle of the polyurethane concrete mixing, placement, vibration, and leveling integrated machine of the present invention is as follows: First, the raw materials of each component of polyurethane concrete are put into the mixing chamber 2 according to the proportion. The hydraulic mixing system is started, and the high-power hydraulic motor drives the mixing shaft to rotate. The high-strength mixing blades 5 on the mixing shaft force the polyurethane concrete to be mixed evenly in the mixing chamber 2, and the components are evenly distributed to achieve the workability required for construction.

[0043] After thorough mixing, the operator controls the opening of the bottom door of the mixing chamber 2 via the hydraulic system. Driven by the hydraulic cylinder, the door opens to the set opening degree. Under the action of gravity, the well-mixed polyurethane concrete falls from the discharge port of the mixing chamber 2 into the buffer distribution hopper 4 below. The discharge speed is controlled by adjusting the opening degree of the door. After the polyurethane concrete enters the buffer distribution hopper 4, the rotating feeding device inside the buffer distribution hopper 4 starts to work. The hydraulic motor drives the feeding shaft 7 to rotate, and the feeding blades 8 on the feeding shaft 7 rotate accordingly. The feeding blades 8 forcefully push the polyurethane concrete in the buffer distribution hopper 4 downward, so that the polyurethane concrete is evenly discharged from the discharge port at the bottom of the buffer distribution hopper 4 and distributed in the anchoring area of ​​the expansion joint.

[0044] The surface-rubbing mechanism behind the buffer material bin 4 performs surface-rubbing treatment on the polyurethane concrete laid in the anchorage area. The surface-rubbing motor 9 drives the surface-rubbing plate 14 to move back and forth in a high-frequency plane along the sliding track 18 through the crank-slider mechanism, repeatedly rubbing the surface of the polyurethane concrete in the anchorage area to make the concrete surface initially smooth and dense. After the surface-rubbing is completed, the vibratory compaction mechanism set behind the surface-rubbing mechanism performs vibration compaction treatment on the polyurethane concrete. The vibratory motor 17 drives the vibratory plate 16 to generate high-frequency vibration. The vibratory plate 16 transfers vibration energy to the polyurethane concrete, causing the air bubbles inside the concrete to be expelled, and the aggregate to be further compacted, improving the density and surface strength of the concrete, and finally making the surface of the polyurethane concrete in the expansion joint anchorage area achieve the design requirements for smoothness and density.

[0045] During the longitudinal movement of the machine along the expansion joint, the mixing, placement, surface preparation, and vibration compaction processes are carried out continuously. A single pass completes all the processes of mixing, placement, vibration, and leveling the polyurethane concrete in the expansion joint anchorage zone, resulting in high construction efficiency and stable, reliable construction quality. During construction, operators can adjust the longitudinal position of the buffer placement bin 4 and the concrete surface treatment device relative to the anchorage zone by using the telescopic adjustment cylinder 6 to drive the telescopic frame 15 to slide longitudinally, based on the actual position of the expansion joint on the road surface. This ensures that the placement and surface treatment operations accurately cover the anchorage zone, achieving precise construction.

[0046] The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine of the present invention is a special equipment designed according to the special performance characteristics of polyurethane concrete. It adopts a high-power hydraulic mixing system, a forced rotation feeding device, and a high-efficiency surface-rubbing vibration mechanism to achieve efficient construction, greatly improve construction efficiency, and ensure construction quality.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A polyurethane concrete mixing, placing, vibrating, and leveling integrated machine, characterized in that: The system includes a frame (1) with a walking mechanism, a mixing chamber (2), a buffer distribution chamber (4), and a concrete surface treatment device mounted on the frame (1); the mixing chamber (2) is equipped with mixing blades (5) for mixing polyurethane concrete; a chamber door for controlling the amount of material to be discharged is provided at the bottom of the mixing chamber (2); the buffer distribution chamber (4) is provided below the mixing chamber (2); the buffer distribution chamber (4) is equipped with a rotating material discharge device for evenly distributing polyurethane concrete in the expansion joint anchorage area; the concrete surface treatment device is located behind the buffer distribution chamber (4) and is used to vibrate and rub the polyurethane concrete in the anchorage area. The frame (1) is installed on the walking mechanism (3) through the lifting mechanism; the length direction of the expansion joint is transverse, and the road surface extension direction is longitudinal.

2. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 1, characterized in that: A hydraulic stirring system is installed inside the stirring chamber (2). The hydraulic stirring system includes a stirring shaft, stirring blades (5) installed on the stirring shaft, and a hydraulic motor that drives the stirring shaft to rotate.

3. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 1, characterized in that: The rotary feeding device includes a feeding shaft (7) arranged longitudinally along the buffer material bin (4), several feeding blades (8) arranged on the feeding shaft (7), and a hydraulic motor that drives the feeding shaft (7) to rotate; the feeding blades (8) push the polyurethane concrete downwards.

4. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 1, characterized in that: The concrete surface treatment device includes a rubbing mechanism, which includes a rubbing bracket (10), a rubbing motor (9), and a rubbing panel (14). The rubbing motor (9) is fixed on the rubbing bracket (10), and the rubbing panel (14) is slidably set on the rubbing bracket (10) and driven by the rubbing motor (9) to perform planar reciprocating movement for rubbing.

5. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 4, characterized in that: The dough-rubbing motor (9) and the dough-rubbing panel (14) are connected and driven by a crank-slider mechanism; the crank plate (11) is fixedly installed on the output shaft of the dough-rubbing motor (9), the dough-rubbing panel (14) is fixedly installed on the slider plate (12), and the slider plate (12) is slidably installed on the sliding rail (18) of the dough-rubbing bracket (10); the crank plate (11) and the slider plate (12) are hinged together by a connecting rod (13).

6. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 1, characterized in that: The concrete surface treatment device also includes a vibratory compaction mechanism located behind the surface-rubbing mechanism; the vibratory compaction mechanism includes a vibratory plate (16) and a vibratory motor (17) that drives the vibratory plate (16).

7. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 1, characterized in that: The buffer material bin (4) and the concrete surface treatment device are set on the telescopic frame (15); the telescopic frame (15) is slidably set on the slide bar (19) at the bottom of the frame (1), and the telescopic adjustment cylinder (6) is set between the telescopic frame (15) and the frame (1); the telescopic frame (15) moves and adjusts its position in the longitudinal direction.

8. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claim 7, characterized in that: Two sets of buffer material bins (4) and concrete surface treatment devices are provided and are set at longitudinal intervals on the telescopic frame (15).

9. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to claims 1-8, characterized in that: The walking mechanism is a walking wheel (3) located at the bottom of the frame (1) and driven by a motor; the walking wheel (3) can rotate and turn.

10. The polyurethane concrete mixing, placing, vibrating, and leveling integrated machine according to any one of claims 1-8, characterized in that: It is also equipped with a hydraulic oil tank and a hydraulic pump; the working power is provided through the hydraulic system.

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