A prestressed concrete pipe pile grouting device

Abstract

The present invention relates to the technical field of building construction, and specifically, to a grouting device for prestressed concrete pipe piles, which includes a grouting truck for transporting raw materials and a grouting cylinder for final treatment of the raw materials. A water tank is fixedly connected to the grouting truck, a water delivery pipe is communicated with one side of the water tank, and the end of the water delivery pipe far from the water tank is communicated with the top of the grouting cylinder. A mud tank is fixedly connected to the top of the water tank, a mud delivery pipe is communicated with one side of the mud tank, and one end of the mud delivery pipe is communicated with the top of the grouting cylinder; a flow control cover is arranged at the end of the water delivery pipe extending into the inner cavity of the grouting cylinder, and a water leakage hole is opened in the middle of the flow control cover. Two kinds of cement slurries with different concentrations can be obtained, and grouting can be directly carried out after completion without passing through a long pipeline, avoiding the problem of change in the thickness of the cement slurry, meeting the grouting standard, and improving the grouting quality.

Description

Technical Field

[0001] The present invention relates to the technical field of soil pipe pile grouting, and specifically, to a prestressed concrete pipe pile grouting device. Background Art

[0002] Prestressed concrete pipe piles have poor penetration ability and obvious soil compaction effect. For high-rise buildings with relatively large average ground reaction forces, the required prestressed concrete pipe piles are longer and denser, which limits the application of prestressed concrete pipe piles in higher high-rise buildings. For traditional cast-in-place concrete bored piles, the ultimate bearing capacity of a single pile can be significantly improved through the post-grouting process after concrete pouring, thereby achieving the purpose of reducing the pile length or the number of piles and saving costs.

[0003] Most prestressed concrete pipe pile grouting devices stir the cement slurry in a stirring device and then inject the pre-stirred cement slurry into the prestressed concrete pipe through a pipeline. However, there are small gaps in the prestressed concrete pipe that need to be filled. At this time, the grouting head needs to be inserted into the prestressed concrete pipe through a pipeline. Usually, the length of the prestressed concrete pipe is long, so the required pipeline is also very long.

[0004] However, according to different filling requirements, the consistency of the required cement slurry is divided into thick cement slurry and thin cement slurry. The consistency of the cement slurry is related to the added water. When the pre-stirred cement slurry is transported downward through a long pipeline, it cannot directly act on the place where grouting is required and will be transported in the pipeline for a long distance. During this period, the cement slurry discharged from the end of the pipeline will harden, which does not conform to the consistency state of the pre-stirred cement slurry. This consistency difference will affect grouting and reduce the grouting effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a prestressed concrete pipe pile grouting device, which can control the water volume and stirring speed by rotating the rotating rod in different directions, and two different concentrations of cement slurry can be obtained. After completion, grouting can be directly carried out without a long pipeline, avoiding the problem of change in the consistency of the cement slurry, and directly obtaining the stirred cement slurry without time difference and reducing the problem of the grouting effect.

[0006] To achieve the above purpose, a prestressed concrete pipe pile grouting device is provided, including a grouting truck for transporting raw materials and a grouting cylinder for final treatment of the raw materials. A water tank is fixedly connected to the grouting truck. One side of the water tank is communicated with a water delivery pipe, and the end of the water delivery pipe away from the water tank is communicated with the top of the grouting cylinder. A mud tank is fixedly connected to the top of the water tank. One side of the mud tank is communicated with a mud delivery pipe, and one end of the mud delivery pipe is communicated with the top of the grouting cylinder;

[0007] One end of the water delivery pipe extending into the inner cavity of the grouting cylinder is provided with a flow control cover. A water leakage hole is opened in the middle of the flow control cover. The flow control cover is rotationally connected to the water delivery pipe through a first hinge, and the flow control cover is in contact with the water delivery pipe. A convex block is arranged at the bottom of the flow control cover. The convex block of the flow control cover is rotationally connected to a vertical rod through a second hinge. A rotating rod is arranged at the middle position of the inner cavity of the grouting cylinder. A circular ring is fixedly connected to the rotating rod. A rotating plate is fixedly connected to the surface of the circular ring. One end of the rotating plate is provided with a sliding rod. The sliding rod is slidably connected to the inside of the rotating plate, and when the sliding rod slides to the maximum length, it contacts the vertical rod.

[0008] When the rotating rod rotates clockwise, it drives the sliding rod to contact the vertical rod to open the flow control cover, making the water flow larger. When the rotating rod rotates counterclockwise, when the sliding rod contacts the vertical rod, the vertical rod bends and the flow control cover still fits with the water delivery pipe.

[0009] As a further improvement of this technical solution, a mounting plate is fixedly connected to the inside of the grouting cylinder. Two groups of torsion springs are arranged on the surface of the mounting plate. A limiting plate is fixedly connected to the mounting plate. The limiting plate contacts the torsion springs to limit the torsion springs. The elastic ends of the torsion springs extend to the bottom of the flow control cover and contact the bottom of the flow control cover. The elastic force of the torsion springs makes the flow control cover fit more closely with the water delivery pipe.

[0010] As a further improvement of this technical solution, a machine box is fixedly connected to the top of the grouting cylinder and at the position between the sludge delivery pipe and the water delivery pipe. A motor is fixedly connected to the inner cavity of the machine box. The output end of the motor is fixedly connected to a connecting rod. The end of the connecting rod away from the motor is rotationally connected to the inner wall of the machine box. A first bevel gear is fixedly connected to the surface of the connecting rod. The top end of the rotating rod penetrates through the bottom of the machine box and extends into the inner cavity of the machine box. A second bevel gear is fixedly connected to the end of the rotating rod extending into the inner cavity of the machine box. The second bevel gear meshes with the first bevel gear.

[0011] As a further improvement of this technical solution, stirring blades for stirring are fixedly connected to the surface of the rotating rod.

[0012] As a further improvement of this technical solution, a docking plate is fixedly connected to the bottom of the grouting cylinder. Four groups of leakage holes are opened on the surface of the docking plate. A spraying hopper is fixedly connected to the bottom of the docking plate. The spraying hopper is communicated with the grouting cylinder through the leakage holes.

[0013] As a further improvement of this technical solution, the bottom end of the rotating rod is rotationally connected to the top of the docking plate. A connecting plate is fixedly connected to the surface of the bottom end of the rotating rod. Four groups of sector plates corresponding to the leakage holes are fixedly connected to the connecting plate, and the bottom of the sector plates contacts the top of the docking plate. The shape of the sector plates is smaller than the leakage holes.

[0014] As a further improvement of this technical solution, a shrinkage plate is provided on one side of the sector plate. One side of the shrinkage plate is slidably connected to the inside of the sector plate. A second stopper is fixedly connected to the bottom of the side of the shrinkage plate away from the sector plate. A first stopper adapted to the second stopper is fixedly connected to the docking plate.

[0015] As a further improvement of this technical solution, when the docking plate rotates clockwise, the second stopper contacts the first stopper to fully expand the shrinkage plate, increasing the blockage of the mud. When the docking plate rotates counterclockwise, the second stopper contacts the first stopper to fully contract the shrinkage plate, reducing the blockage of the mud.

[0016] As a further improvement of this technical solution, a number of groups of baffles are fixedly connected to the inner wall of the grouting cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In this prestressed concrete pipe pile grouting device, when the pre-treated cement and water enter the grouting cylinder through the mud conveying pipe and the water conveying pipe, the rotating rod rotates clockwise or counterclockwise according to the required consistency of the cement slurry. When the rotating rod rotates clockwise, the sliding rod contacts the vertical rod during the rotation process, driving the vertical rod to move. The movement of the vertical rod drives the flow control cover to open. When the flow control cover opens, the water in the water conveying pipe directly flows out, increasing the amount of water flowing into the grouting cylinder. Then, through the rapid rotation of the stirring blades, a thinner cement slurry is obtained through rapid stirring and discharged directly to the required position of the prestressed concrete pipe pile for grouting. Or, through the slower counterclockwise rotation of the rotating rod and only a small amount of water passing through the water leakage holes for stirring, a thicker cement slurry is obtained. By rotating the rotating rod in different directions, the control of the water volume and the stirring speed can be achieved, and two different concentrations of cement slurry can be obtained. After completion, grouting can be directly carried out without passing through a long pipeline, avoiding the problem of change in the consistency of the cement slurry, meeting the grouting standard, and improving the grouting quality.

[0019] 2. In this prestressed concrete pipe pile grouting equipment, when the rotating rod rotates clockwise or counterclockwise to obtain cement slurry with different consistencies, the rotation of the rotating rod also drives the sector plate to rotate. When the rotating rod rotates clockwise, the sector plate also rotates clockwise, and relatively thin cement slurry is obtained. At this time, the flow rate of the slurry is relatively large. The clockwise rotation of the sector plate drives the contraction plate to rotate. During the rotation of the contraction plate, the second block at the bottom contacts the first block on the docking plate. Under the action of the resistance, the contraction plate opens. When the contraction plate is fully opened, the coverage area is increased, blocking the position corresponding to the leakage hole and controlling the flow rate at a suitable grouting speed. When the sector plate rotates counterclockwise, during the rotation of the contraction plate, the second block at the bottom contacts the first block on the docking plate. Under the action of the resistance, the contraction plate shrinks back into the sector plate. When the contraction plate is fully contracted, the coverage area is reduced, increasing the area of the leakage hole, and the relatively thick slurry can leak out quickly, facilitating grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the grouting cylinder of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the chassis of the present invention;

[0023] Figure 4 is a schematic diagram of the internal structure of the grouting cylinder of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the stirring blade of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the torsion spring of the present invention;

[0026] Figure 7 is a schematic diagram of the structure of the vertical rod of the present invention;

[0027] Figure 8 is a schematic diagram of the structure of the flow control cover of the present invention;

[0028] Figure 9 is a schematic diagram of the structure of the grouting hopper of the present invention;

[0029] Figure 10 is a schematic diagram of the structure of the docking plate of the present invention;

[0030] Figure 11 is a schematic diagram of the structure of the sector plate of the present invention;

[0031] Figure 12 is a schematic diagram of the structure of the rotating plate of the present invention.

[0032] The meanings of the various reference numerals in the figure are as follows:

[0033] 1. Grouting truck; 2. Mud tank; 3. Mud delivery pipe; 4. Water tank; 5. Water delivery pipe; 6. Grouting cylinder; 7. Chassis; 8. Motor; 9. Connecting rod; 10. First bevel gear; 11. Second bevel gear; 12. Rotating rod; 13. Stirring blade; 14. Flow control cover; 15. First hinge; 16. Mounting plate; 17. Torsion spring; 18. Limiting plate; 19. Leakage hole; 20. Vertical rod; 21. Second hinge; 22. Ring; 23. Rotating plate; 24. Sliding rod; 25. Baffle; 26. Spraying hopper; 27. Docking plate; 28. Leakage hole; 29. First stop block; 30. Connecting plate; 31. Sector plate; 32. Shrinking plate; 33. Second stop block. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0037] Please refer to Figures 1 - 12As shown in the figure, the purpose of this embodiment is to provide a grouting device for prestressed concrete pipe piles, including a grouting truck 1 for transporting raw materials and a grouting cylinder 6 for final treatment of the raw materials. A water tank 4 is fixedly connected to the grouting truck 1. One side of the water tank 4 is communicated with a water delivery pipe 5. The end of the water delivery pipe 5 far from the water tank 4 is communicated with the top of the grouting cylinder 6. A mud tank 2 is fixedly connected to the top of the water tank 4. One side of the mud tank 2 is communicated with a mud delivery pipe 3. One end of the mud delivery pipe 3 is communicated with the top of the grouting cylinder 6;

[0038] One end of the water delivery pipe 5 extending into the inner cavity of the grouting cylinder 6 is provided with a flow control cover 14. A water leakage hole 19 is opened in the middle of the flow control cover 14. The flow control cover 14 is rotatably connected to the water delivery pipe 5 through a first hinge 15, and the flow control cover 14 fits with the water delivery pipe 5. A convex block is arranged at the bottom of the flow control cover 14. The convex block of the flow control cover 14 is rotatably connected to a vertical rod 20 through a second hinge 21. A rotating rod 12 is arranged at the middle position of the inner cavity of the grouting cylinder 6. A circular ring 22 is fixedly connected to the rotating rod 12. A rotating plate 23 is fixedly connected to the surface of the circular ring 22. One end of the rotating plate 23 is provided with a sliding rod 24. The sliding rod 24 is slidably connected to the inside of the rotating plate 23, and when the sliding rod 24 slides to the maximum length, it contacts the vertical rod 20;

[0039] When the rotating rod 12 rotates clockwise, it drives the sliding rod 24 to contact the vertical rod 20 to open the flow control cover 14, making the water flow larger. When the rotating rod 12 rotates counterclockwise, when the sliding rod 24 contacts the vertical rod 20, the vertical rod 20 bends and the flow control cover 14 still fits with the water delivery pipe 5.

[0040] When the pre-treated cement and water enter the grouting cylinder 6 through the mud delivery pipe 3 and the water delivery pipe 5, at this time, the consistency of the mud injected only through the mud delivery pipe 3 is greater than that of the mud in normal grouting. Such mud has very little water and its consistency will not change greatly when flowing in the pipeline. At the same time, the small amount of water also ensures that the mud is well mixed with the water flow in the subsequent water delivery pipe 5 to obtain a more suitable mud for grouting. Then, according to the required consistency of the cement slurry, the rotating rod 12 is rotated clockwise or counterclockwise. When the rotating rod 12 rotates clockwise, it drives the rotating plate 23 to rotate. Under the action of centrifugal force, the rotating plate 23 rotates and throws the sliding rod 24 out of the inside of the rotating plate 23. At this time, during the rotation of the sliding rod 24 along with the rotating plate 23, it contacts the vertical rod 20, driving the vertical rod 20 to move. At the same time, the movement of the vertical rod 20 drives the flow control cover 14 to open. The flow control cover 14 opens gradually following the movement of the vertical rod 20. This opening becomes larger from small, and the water flow also gradually becomes larger through the opening opened by the flow control cover 14, increasing the amount of water flowing into the grouting cylinder 6. Then, through the rapid rotation of the stirring blades 13, a thinner cement slurry is obtained and quickly discharged to directly grout the required position of the prestressed concrete pipe pile;

[0041] By rotating the rotating rod 12 in different directions to control the water volume and stirring speed, two cement slurries with different concentrations can be obtained. After completion, grouting can be carried out directly without passing through a long pipeline, avoiding the problem of cement slurry thickness changes, meeting grouting standards, and improving grouting quality.

[0042] A mounting plate 16 is fixedly connected to the inside of the grouting tube 6, and two groups of torsion springs 17 are arranged on the surface of the mounting plate 16. A limiting plate 18 is fixedly connected to the mounting plate 16, and the limiting plate 18 contacts with the torsion spring 17 to limit the torsion spring 17. The elastic end of the torsion spring 17 extends to the bottom of the flow control cover 14 and contacts with the bottom of the flow control cover 14. The elastic force of the torsion spring 17 makes the flow control cover 14 fit more closely to the water pipe 5.

[0043] The flow control cover 14 is tightly attached to the water pipe 5 by the elastic force of the torsion spring 17. When the sliding rod 24 contacts the vertical rod 20, since the vertical rod 20 is made of rubber, it will bend and deform when the thrust of the sliding rod 24 reaches the maximum, thereby breaking away from the continuous squeezing of the sliding rod 24 and avoiding structural damage due to rigid contact. Specifically, when the rotating rod 12 rotates clockwise, the sliding rod 24 is thrown out and pushes the vertical rod 20 under the action of centrifugal force. The vertical rod 20 drives the flow control cover 14 to rotate around the first hinge 15 through the second hinge 21, compressing the torsion spring 17 and opening the water outlet of the water pipe 5; when the rotating rod 12 rotates counterclockwise, the movement direction of the sliding rod 24 forms an obtuse angle with the hinge direction of the vertical rod 20, causing the vertical rod 20 to only bend without pushing the flow control cover 14, so that it remains in a state of being in contact with the water pipe 5. When the sliding rod 24 continues to rotate, the vertical rod 20 separates from the sliding rod 24. At this time, under the elastic force of the torsion spring 17, the flow control cover 14 is again in contact with the water pipe 5. At this time, the water continues to flow out through the leakage hole 19. When the sliding rod 24 rotates to the position of the vertical rod 20 again, the above operation is repeated. Under such operation, the water flows into the grouting barrel 6 at a speed greater than the outflow speed of the leakage hole 19 to dilute the cement slurry.

[0044] The sliding rod 24 is slidably connected to the inner cavity of the rotating plate 23 , but is also limited by the interior of the rotating plate 23 , and can move to a maximum position where it contacts the vertical rod 20 .

[0045] A chassis 7 is fixedly connected to the top of the grouting cylinder 6 and located between the mud pipe 3 and the water pipe 5. A motor 8 is fixedly connected to the inner cavity of the chassis 7. A connecting rod 9 is fixedly connected to the output end of the motor 8. The end of the connecting rod 9 away from the motor 8 is rotatably connected to the inner wall of the chassis 7. A first bevel gear 10 is fixedly connected to the surface of the connecting rod 9. The top of the rotating rod 12 passes through the bottom of the chassis 7 and extends to the inner cavity of the chassis 7. The end of the rotating rod 12 extending to the inner cavity of the chassis 7 is fixedly connected to a second bevel gear 11, which is meshed with the first bevel gear 10. A stirring blade 13 for stirring is fixedly connected to the surface of the rotating rod 12.

[0046] The rotation of the motor 8 drives the connecting rod 9 to rotate. The rotation of the connecting rod 9 drives the first bevel gear 10 to rotate. The first bevel gear 10 then drives the second bevel gear 11 to rotate. The rotation of the second bevel gear 11 drives the rotating rod 12 to rotate. The rotation of the rotating rod 12 drives the stirring blade 13 to rotate. By the forward and reverse rotation of the motor 8, the clockwise and counterclockwise rotation of the rotating rod 12 is realized. At the same time, when the motor 8 controls the rotating rod 12 to rotate clockwise, the rotation speed increases, and when the motor 8 controls the rotating rod 12 to rotate counterclockwise, the rotation speed decreases. The stirring speed is controlled by different rotation speeds.

[0047] A butt plate 27 is fixedly connected to the bottom of the grouting cylinder 6. Four groups of leakage holes 28 are formed on the surface of the butt plate 27. A grout spraying hopper 26 is fixedly connected to the bottom of the butt plate 27. The grout spraying hopper 26 is communicated with the grouting cylinder 6 through the leakage holes 28.

[0048] The bottom end of the rotating rod 12 is rotatably connected to the top of the butt plate 27. A connecting plate 30 is fixedly connected to the surface of the bottom end of the rotating rod 12. Four groups of sector plates 31 corresponding to the leakage holes 28 are fixedly connected to the connecting plate 30. And the bottom of the sector plate 31 contacts the top of the butt plate 27. The shape of the sector plate 31 is smaller than that of the leakage hole 28.

[0049] A contraction plate 32 is arranged on one side of the sector plate 31. One side of the contraction plate 32 is slidably connected to the inside of the sector plate 31. A second stop block 33 is fixedly connected to the bottom of the side of the contraction plate 32 away from the sector plate 31. A first stop block 29 adapted to the second stop block 33 is fixedly connected to the butt plate 27.

[0050] The sector radius of the leakage hole 28 is larger than the sector radii of the sector plate 31 and the contraction plate 32. A gap is generated between the sector front ends of the sector plate 31 and the contraction plate 32 and the sector front end of the leakage hole 28. This allows the cement slurry to have extra space to flow out and will not be blocked due to the rotation of the sector plate 31 and the contraction plate 32. At the same time, the center position of the contraction plate 32 is rotatably connected to the center position of the sector plate 31. So the contraction plate 32 can be unfolded in the way of a fan opening. However, the inside of the sector plate 31 limits the contraction plate 32, and the contraction plate 32 can only be opened to a position where it fits one side of the leakage hole 28.

[0051] When the butt plate 27 rotates clockwise, the second stop block 33 contacts the first stop block 29 to fully expand the contraction plate 32, increasing the blockage of the slurry. When the butt plate 27 rotates counterclockwise, the second stop block 33 contacts the first stop block 29 to fully contract the contraction plate 32, reducing the blockage of the slurry.

[0052] The lower height of the first stop 29 and the second stop 33 will not affect the rotation of the fan plate 31. Only when the second stop 33 contacts the first stop 29 will a larger resistance occur. When the rotating rod 12 rotates clockwise, the retractable plate 32 is pulled out and unfolded through this resistance. This process occurs during the rotation of the fan plate 31. When the retractable plate 32 is fully unfolded, the fan plate 31 runs to the farthest distance from the first stop 29. The movement of the fan plate 31 will drive the retractable plate 32 and the second stop 33 to break away from the contact with the first stop 29. At the same time, the retractable plate 32 remains in the unfolded state. Each subsequent passage through the first stop 29 can reinforce the unfolding of the retractable plate 32 through the resistance generated by the contact of the second stop 33 with it.

[0053] When the rotating rod 12 rotates counterclockwise, the shrinking plate 32 is pressed back into the inner part of the sector plate 31 through the above-mentioned operation direction rotation.

[0054] When the rotating rod 12 rotates clockwise or counterclockwise to obtain cement slurries of different viscosities, the rotation of the rotating rod 12 also drives the fan-shaped plate 31 to rotate. When the rotating rod 12 rotates clockwise, the fan-shaped plate 31 also rotates clockwise. Clockwise rotation obtains a thinner cement slurry. At this time, the flow rate of the slurry is relatively large, which is not conducive to grouting. The clockwise rotation of the fan-shaped plate 31 drives the shrinking plate 32 to rotate. During the rotation of the shrinking plate 32, the second stopper 33 at the bottom contacts the first stopper 29 on the docking plate 27. Under the action of resistance, the shrinking plate 32 opens. When the shrinking plate 32 is fully opened, the coverage area is increased, the gap position of the leakage hole 28 is blocked, the flow gap of the cement slurry is reduced, and the downward flow rate of the thinner cement slurry is reduced during the rotation process, and the flow rate is controlled at a suitable grouting speed.

[0055] When the fan-shaped plate 31 rotates counterclockwise, the second stopper 33 at the bottom of the contraction plate 32 contacts the first stopper 29 on the docking plate 27 during the rotation process. Under the action of resistance, the contraction plate 32 contracts back into the fan-shaped plate 31. When the contraction plate 32 is fully contracted, the coverage area is reduced, so that the area of ​​the leakage hole 28 is increased, and the thicker liquid can leak out quickly, which is convenient for grouting.

[0056] When the rotating rod 12 rotates counterclockwise, the sliding rod 24 contacts the side of the vertical rod 20 without the second hinge 21 , so that when the sliding rod 24 contacts the vertical rod 20 during the rotation process, the vertical rod 20 will bend through the second hinge 21 and will not affect the movement of the sliding rod 24 .

[0057] The cement slurry processed in the grouting tube 6 can directly leak into the spraying bucket 26 through the four groups of leakage holes 28 on the docking plate 27, so it is blocked by the rotation of the fan plate 31 and the contraction plate 32 to control the speed of the cement slurry entering the spraying bucket 26 to prevent blockage or insufficient feeding.

[0058] Several groups of baffles 25 are fixedly connected to the inner wall of the grouting cylinder 6.

[0059] Working principle: This prestressed concrete pipe pile grouting equipment mainly consists of a grouting truck 1, a grouting cylinder 6, and parallel water pipes 5 and mud pipes 3. The water tank 4 on the grouting truck 1 is connected to the grouting cylinder 6 through the water pipe 5, and the mud tank 2 is connected to the grouting cylinder 6 through the mud pipe 3. After the pre-treated cement slurry and water enter the grouting cylinder 6 through the mud pipe 3 and the water pipe 5 respectively, the rotating rod 12 rotates clockwise or counterclockwise according to the required thickness of the cement slurry. When the rotating rod 12 rotates clockwise, it drives the rotating plate 23 to rotate. Under the action of centrifugal force, the sliding rod 24 is thrown out of the inside of the rotating plate 23. At this time, the sliding rod 24 contacts the vertical rod 20 during the rotation of the rotating plate 23, driving the vertical rod 20 to move. At the same time, the movement of the vertical rod 20 drives the flow control cover 14 to open, and the opening of the flow control cover 14 increases the amount of water flowing into the grouting cylinder 6.

[0060] Then, through the rapid rotation and stirring of the stirring blades 13, a thinner cement slurry is obtained. At the same time, when the rotating rod 12 rotates clockwise, the sector plate 31 also rotates clockwise, and a relatively thin cement slurry is obtained by clockwise rotation. At this time, the flow rate of the mud is relatively large. The clockwise rotation of the sector plate 31 drives the contraction plate 32 to rotate. During the rotation of the contraction plate 32, the second stop block 33 at the bottom contacts the first stop block 29 on the docking plate 27. Under the action of the resistance, the contraction plate 32 opens. When the contraction plate 32 is fully opened, the coverage area is increased, blocking the position corresponding to the leakage hole 28. During the rotation, the downward flow rate of the thinner cement slurry is reduced, and the flow rate is controlled at a suitable grouting speed, and it is quickly discharged to directly grout the required position of the prestressed concrete pipe pile. While stirring, the cement slurry also flows downward. When the rotating rod 12 rotates clockwise or counterclockwise, different thicknesses of cement slurry can be obtained. The rotation of the rotating rod 12 also drives the sector plate 31 to rotate. When the sector plate 31 rotates counterclockwise, during the rotation of the contraction plate 32, the second stop block 33 at the bottom contacts the first stop block 29 on the docking plate 27. Under the action of the resistance, the contraction plate 32 contracts back into the inside of the sector plate 31. When the contraction plate 32 is fully contracted, the coverage area is reduced, increasing the area of the leakage hole 28, and the relatively thick cement slurry can leak out quickly, facilitating grouting.

[0061] It should be noted here that the mud tank 2 contains pre-treated cement slurry, and this cement slurry is thicker than conventional cement slurry.

[0062] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A prestressed concrete pile grouting device, comprising a grouting vehicle (1) for conveying raw materials and a grouting cylinder (6) for final processing of the raw materials, characterized in that: The grouting vehicle (1) is fixedly connected to a water tank (4), one side of the water tank (4) is connected to a water delivery pipe (5), one end of the water delivery pipe (5) away from the water tank (4) is connected to the top of the grouting barrel (6), the top of the water tank (4) is fixedly connected to a mud box (2), one side of the mud box (2) is connected to a mud delivery pipe (3), one end of the mud delivery pipe (3) is connected to the top of the grouting barrel (6); A flow control cover (14) is provided at one end of the water pipe (5) extending to the inner cavity of the grouting barrel (6), a water leakage hole (19) is provided in the middle of the flow control cover (14), the flow control cover (14) is rotatably connected to the water pipe (5) via a first hinge (15), and the flow control cover (14) is in close contact with the water pipe (5), a convex block is provided at the bottom of the flow control cover (14), and the convex block of the flow control cover (14) is rotatably connected to a vertical rod (20) via a second hinge (21), a rotating rod (12) is provided at the middle position of the inner cavity of the grouting barrel (6), a circular ring (22) is fixedly connected to the rotating rod (12), a rotating plate (23) is fixedly connected to the surface of the circular ring (22), a sliding rod (24) is provided at one end of the rotating plate (23), the sliding rod (24) is slidably connected to the inside of the rotating plate (23), and when the sliding rod (24) slides to a maximum length, it contacts the vertical rod (20); When the rotating rod (12) rotates clockwise, the sliding rod (24) is driven to contact the vertical rod (20) to open the flow control cover (14), thereby increasing the water flow; when the rotating rod (12) rotates counterclockwise, the sliding rod (24) is brought into contact with the vertical rod (20), and the vertical rod (20) is bent so that the flow control cover (14) and the water pipe (5) are still in contact; The interior of the grouting cylinder (6) is fixedly connected to a mounting plate (16), the surface of the mounting plate (16) is provided with two groups of torsion springs (17), a limiting plate (18) is fixedly connected to the mounting plate (16), the limiting plate (18) contacts the torsion spring (17) to limit the torsion spring (17), and the elastic end of the torsion spring (17) extends to the bottom of the flow control cover (14) and is in contact with the bottom of the flow control cover (14).

2. The prestressed concrete pipe pile grouting equipment according to claim 1 is characterized in that: A chassis (7) is fixedly connected to the top of the grouting cylinder (6) and located between the mud delivery pipe (3) and the water delivery pipe (5); a motor (8) is fixedly connected to the inner cavity of the chassis (7); a connecting rod (9) is fixedly connected to the output end of the motor (8); an end of the connecting rod (9) away from the motor (8) is rotatably connected to the inner wall of the chassis (7); a first bevel gear (10) is fixedly connected to the surface of the connecting rod (9); a top end of the rotating rod (12) passes through the bottom of the chassis (7) and extends to the inner cavity of the chassis (7); an end of the rotating rod (12) extending to the inner cavity of the chassis (7) is fixedly connected to a second bevel gear (11); the second bevel gear (11) is meshed with the first bevel gear (10).

3. The prestressed concrete pipe pile grouting equipment according to claim 2 is characterized in that: A stirring blade (13) for stirring is fixedly connected to the surface of the rotating rod (12).

4. The prestressed concrete pipe pile grouting equipment according to claim 1 is characterized in that: The bottom of the grouting cylinder (6) is fixedly connected to a docking plate (27), the surface of the docking plate (27) is provided with four groups of leakage holes (28), the bottom of the docking plate (27) is fixedly connected to a grouting bucket (26), and the grouting bucket (26) is connected to the grouting cylinder (6) through the leakage holes (28).

5. The prestressed concrete pipe pile grouting equipment according to claim 4 is characterized in that: The bottom end of the rotating rod (12) is rotatably connected to the top of the docking plate (27); a connecting plate (30) is fixedly connected to the surface of the bottom end of the rotating rod (12); four groups of fan-shaped plates (31) corresponding to the leakage holes (28) are fixedly connected to the connecting plate (30); the bottom of the fan-shaped plates (31) is in contact with the top of the docking plate (27); and the shape of the fan-shaped plates (31) is smaller than the leakage holes (28).

6. The prestressed concrete pipe pile grouting equipment according to claim 5, characterized in that: A contraction plate (32) is provided on one side of the fan-shaped plate (31), one side of the contraction plate (32) is slidably connected to the inside of the fan-shaped plate (31), a second stopper (33) is fixedly connected to the bottom of the contraction plate (32) away from the fan-shaped plate (31), and a first stopper (29) adapted to the second stopper (33) is fixedly connected to the docking plate (27).

7. The prestressed concrete pipe pile grouting equipment according to claim 6, characterized in that: When the docking plate (27) rotates clockwise, the second stopper (33) contacts the first stopper (29), so that the retractable plate (32) is fully extended, thereby increasing the resistance to mud. When the docking plate (27) rotates counterclockwise, the second stopper (33) contacts the first stopper (29), so that the retractable plate (32) is fully retracted.

8. The prestressed concrete pipe pile grouting equipment according to claim 1, characterized in that: A plurality of groups of baffles (25) are fixedly connected to the inner wall of the grouting cylinder (6).

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