A device for filling the gap between a concrete base and a sub-base

Abstract

This application relates to the field of concrete structure repair and reinforcement technology, specifically a grouting and filling device for voids between a concrete base and a subgrade layer. The device comprises a casing, a base, two material cylinders, a pump body, two T-pipes, two high-pressure pipes, and a mixing pipe. To achieve continuous preparation and stable delivery of grout for void repair, the casing is equipped with a mixing mechanism for online processing of the grout state within the material cylinders to ensure the compactness of the grout repair layer. This grouting and filling device for voids between a concrete base and a subgrade layer can flexibly switch mixing modes according to grout viscosity, construction progress, and the size of the void area. Under normal operating conditions, integrated mixing is used to ensure uniform grout mixing and lower energy consumption. For high-viscosity, fast-setting grout or emergency construction conditions, independent high-speed mixing is used to quickly complete grout mixing, completely solving the shortcomings of traditional grouting equipment with its single mixing mode and limited adaptability to various operating conditions.

Description

Technical Field

[0001] This application relates to the field of concrete structure repair and reinforcement technology, and in particular to a grouting filling device for the void between a concrete base and a subgrade layer. Background Technology

[0002] Voids between the concrete base and the subgrade layer are common structural defects in railways, highways, and buildings. In high-speed railway ballastless track structures, the concrete base slab itself has high stiffness, which differs significantly from the supporting stiffness of the underlying subgrade surface. After the train load is unloaded, the base slab rebounds, leading to separation from the subgrade surface. Under prolonged rainfall, rainwater infiltrates the voided area and continuously saturates the subgrade surface. Under cyclical train loads, the base slab continuously poundes against the subgrade surface, causing fine particles on the surface to mix with the infiltrated rainwater, forming mud, which eventually develops into slurry seepage and mud pumping defects. Furthermore, in highway concrete pavements and various concrete base structures, voids easily form between the base and the subgrade due to factors such as foundation settlement, temperature changes, and load effects. The existence of voids not only weakens the structural bearing capacity but also causes uneven settlement, structural cracking, and other problems, seriously affecting the safety and durability of the engineering structure.

[0003] Currently, the main treatment for interlayer voids is grouting, which involves injecting cement-based or chemical grout into the voided areas to restore the structure's density and integrity. However, existing grouting equipment still has significant drawbacks in actual construction: First, the equipment's mixing function and grouting operation have poor coordination. Limited by the initial setting time window of the grout and the duration of continuous operation, the active components of the grout in the cylinder are prone to decay and the fluidity is reduced, directly affecting the penetration and filling effect of the injected grout on the voided areas. Second, during the grouting process, the grout layer on the cylinder wall gradually thickens and hardens into a shell, which not only changes the effective mix ratio of the grout, causing the strength of the injected grout to deviate from the design specifications, but also frequently blocks the grouting pipeline due to the shedding of the hardened blocks, resulting in unstable grouting pressure and incomplete filling. In addition, the above problems force the equipment to frequently stop for cleaning during the construction window, severely interrupting the continuity of grouting operations and greatly reducing the construction efficiency and reliability of void repair. Therefore, there is an urgent need to develop a grouting and filling device that can ensure the homogeneity and stability of the grout throughout the grouting process and has a self-cleaning function for the cylinder wall. This would solve problems such as grouting interruption and incomplete filling caused by grout performance degradation and equipment blockage, thereby meeting the urgent need for efficient, continuous, and high-quality grouting construction in the repair of voids between the concrete base and the subgrade. Summary of the Invention

[0004] To address the technical challenges in existing technologies where defects in grouting equipment lead to incomplete filling of voided areas and failure of interlayer load transfer after repair, this application provides a grouting filling device for voids between a concrete base and a subgrade layer. The device aims to achieve high-density filling of voided areas by ensuring the homogeneity of the grout throughout the process and the continuous and stable grouting, thereby restoring effective contact and collaborative bearing capacity between the concrete base and the subgrade layer and meeting the requirements for structural durability repair.

[0005] This application provides a grouting filling device for voids between a concrete base and a subgrade layer, employing the following technical solution: A grouting and filling device for voids between a concrete base and a subgrade layer includes a concrete grouting and filling equipment consisting of a machine box, a base, two material cylinders, a pump body, two T-pipes, two high-pressure pipes, and a mixing pipe. To achieve continuous preparation and stable delivery of grout for repairing void areas, the machine box is equipped with a mixing mechanism for online processing of the grout state in the material cylinders to ensure the compactness of the grouting repair layer. The grout outlet end of the mixing pipe is configured for pressure-stabilized grouting into the void gap between the base and the subgrade. The pump body continuously injects the homogeneous grout processed by the mixing mechanism into the void area to achieve complete filling of the interlayer voids and overall structural repair. The mixing mechanism includes a linkage component, a stirring rod, and a guide frame. The linkage component is connected to the stirring rod and is linked with the pump body. The guide frame has an electric guide shaft that guides the stirring rod. The stirring rod has a second guide groove inside. Through the linkage component and the pump body, the stirring rod can be raised and lowered simultaneously during the grouting operation to maintain the homogeneity of the grout. At the same time, the electric guide shaft guides the stirring rod to rotate. The stirring rod has a cavity inside, and an adjustment component is provided inside the cavity to remove slurry adhering to the inner wall of the material cylinder to ensure continuous grouting. The adjustment component consists of an adjustment element and a driving element.

[0006] Optional: The linkage assembly includes a lifting rod and a drive seat. The drive seat is rotatably mounted on the top side of the chassis. The drive seat is connected to the drive part of the pump body via a linkage shaft. A connecting plate and a connecting block are fixed at the upper and lower ends of the lifting rod, respectively. A guide rod is bolted to the outer wall of the connecting block. A guide groove is provided inside the drive seat to guide and cooperate with the guide rod. The connecting plate is rotatably connected to the top end of the stirring rod.

[0007] Optionally: the guide groove is wavy in shape and surrounds the outer surface of the drive seat. A limiting platform is installed between the two material cylinders. The lifting rod passes through the inside of the limiting platform, and a buffer spring is wound around the outer surface of the lifting rod. A limiting rod that passes through the bottom end of the lifting rod is fixed on the top side of the machine box.

[0008] Optional: The guide frame is fixed to the top side of the material cylinder, the top end of the stirring rod passes through the interior of the guide frame, and the second guide groove is composed of a straight groove and a spiral groove, wherein the straight groove and the spiral groove are connected on adjacent sides.

[0009] Optional: The adjusting component includes a telescopic shaft and a scraper. One end of the telescopic shaft extends to the outside of the stirring rod and is fixed to the scraper. The other end of the telescopic shaft is fixed with an abutment block that is linked to the driving component. A return spring is wound around the outer surface of the telescopic shaft.

[0010] Optionally, the driving component includes a drive motor, a transmission shaft that fixes the output shaft of the drive motor, and a cam seat that is fixed to the outer surface of the transmission shaft and intermittently interferes with the abutment block.

[0011] Optionally, the driving component further includes a clamping module and a centrifugal module. The centrifugal module is installed on the outer surface of the drive shaft and is used to drive the clamping module to achieve clamping of the telescopic shaft. The centrifugal module includes a centrifugal disc fixed to the outer surface of the drive shaft. A telescopic groove is opened inside the centrifugal disc. A centrifugal rod slides inside the telescopic groove, and a return spring is installed between one end of the centrifugal rod and the inner wall of the telescopic groove.

[0012] Optional: The clamping module includes a hollow sleeve and a guide sleeve. A guide rod is slidably installed inside the sleeve, and a clamping block is fixed at one end of the guide rod. The other end of the guide rod is provided with a spherical surface. The inner side of the guide sleeve is provided with a conical guide slope. When the centrifugal disc rotates with the drive shaft, the scraper is first displaced by the abutting engagement between the cam seat and the abutting block. At the same time, the rotation of the centrifugal disc drives the centrifugal rod to generate centrifugal force. The centrifugal rod moves outward and pushes the guide sleeve to move, thereby driving the guide rod to move the clamping block to fit against the telescopic shaft.

[0013] Optional: A second return spring is wound around the outer surface of the guide rod; a guide rail is fixed on the bottom wall of the cavity; the abutment block and the guide sleeve are both slidably connected to the guide rail; and there are multiple clamping blocks.

[0014] Optional: A support leg is installed between the chassis and the base. There are two stirring rods, each disposed in one of the two material cylinders. A rotating mechanism is provided between the two material cylinders. The rotating mechanism includes a drive motor fixed to the bottom side of the limiting platform, a transmission sleeve rotatably mounted on the top side of the two material cylinders, and a transmission wheel fixed to the output shaft of the drive motor. A transmission belt is connected to both the transmission wheel and the two transmission sleeves. The two stirring rods are splinedly connected to the two transmission sleeves respectively. When the rotating mechanism is working, the electric guide shaft is disengaged from the stirring rod. When the electric guide shaft is connected to the stirring rod, the rotating mechanism is adjusted to a non-working state.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention, through a dual-mode interlocking structure of linked stirring and independent high-speed stirring, allows for flexible switching of stirring modes based on slurry viscosity, construction progress, and the size of void areas. In normal working conditions, linked integrated stirring is used to ensure uniform slurry mixing and lower energy consumption; in high-viscosity, fast-setting slurry or emergency construction conditions, independent high-speed stirring is used to quickly complete slurry mixing, completely solving the shortcomings of traditional grouting equipment with a single stirring mode and limited adaptability to working conditions.

[0016] 2. This invention, by incorporating an adaptive scraping structure within the stirring rod, precisely maintains the effective mixing ratio of the slurry, preventing the strength of the injected repair body from deviating from the design specifications due to the drying and hardening of the material adhering to the cylinder wall; at the same time, it prevents the falling off of dried-up blocks from clogging the pipeline, ensuring the continuous and stable grouting pressure in the voided area, and ensuring that the slurry can fully penetrate to the deepest part of the voided area to achieve full filling.

[0017] 3. This invention, by setting up two sets of symmetrically arranged material cylinders, stirring rods and grouting pipelines, can simultaneously complete the mixing and pressure stabilization of grout in two chambers, which greatly improves the filling efficiency of the void area compared with single-chamber grouting equipment.

[0018] 4. This invention solves the problem of cold joints that are easy to occur during the repair of large-scale void areas by setting up a double-cylinder and double-channel confluence pressure-stabilizing grouting structure, ensuring that the repair layer forms a continuous and dense overall load-bearing structure with the existing concrete base and subgrade, effectively restoring and improving the long-term durability of the structure. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the overall structure of this application; Figure 2 This is a schematic diagram of the structure of the tee pipe in this application; Figure 3 This is a cross-sectional view of the material cylinder of this application; Figure 4 This is a schematic diagram of the mixing mechanism of this application; Figure 5 This is a structural schematic diagram of the stirring rod and linkage assembly of this application; Figure 6 This is a cross-sectional view of the guide frame structure of this application; Figure 7 This is a cross-sectional view of the structure of the adjustment component in this application; Figure 8 This application Figure 7 A magnified structural diagram of structure A is shown.

[0020] Explanation of reference numerals in the attached figures: 1. Concrete grouting and filling equipment; 11. Casing; 12. Base; 13. Cylinder; 14. Pump body; 15. T-pipe; 16. High-pressure pipe; 17. Mixing pipe; 2. Support leg; 3. Mixing mechanism; 31. Linkage assembly; 311. Lifting rod; 312. Drive seat; 313. Guide groove one; 314. Connecting block; 315. Guide rod; 316. Limiting rod; 317. Connecting plate; 318. Buffer spring; 32. Mixing rod; 321. Cavity; 33. Guide frame; 331. Electric guide shaft; 34. Guide groove two; 35. Adjustment assembly; 351. Adjusting component; 3511. Telescopic shaft; 351 2. Scraper; 3513. Abutment block; 3514. Return spring one; 352. Driving component; 3521. Drive motor; 3522. Transmission shaft; 3523. Cam seat; 3524. Centrifugal disc; 3525. Sleeve; 3526. Guide sleeve; 3527. Clamping block; 3528. Guide rod; 3529. Return spring two; 35210. Spherical surface; 35211. Guide inclined surface; 35212. Telescopic groove; 35213. Centrifugal rod; 35214. Return spring three; 353. Guide rail; 4. Rotating mechanism; 41. Drive motor; 42. Transmission sleeve; 43. Transmission wheel; 44. Transmission belt. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0022] Example 1 like Figure 1 and Figure 2 As shown, a grouting and filling device for gaps between a concrete base and a subgrade layer includes a concrete grouting and filling equipment 1 consisting of a housing 11, a base 12, two material cylinders 13, a pump body 14, two high-pressure pipes 16, and a mixing pipe 17. A mixing mechanism 3 is installed on the housing 11. Support legs 2 are installed between the housing 11 and the base 12. Specifically, the base 12 of the concrete grouting and filling equipment 1 is a rectangular load-bearing steel frame structure. The housing 11 and the base 12 are welded and fixed. The housing 11 and the base 12 are supported by the support legs 2, and the bottom of the support legs 2 is equipped with shock-absorbing rubber pads to achieve vibration reduction and leveling of the equipment. It should be noted that the internal components of the chassis 11 include an electrical control module and a pump body 14 drive module. The two material cylinders 13 are fixed to the top side of the base 12 and are vertically distributed. The pump body 14 is a high-pressure grouting pump with an adjustable output pressure range of 0-10MPa. The output end of the pump body 14 is symmetrically connected to two T-pipes 15. One end of each T-pipe 15 is connected to the bottom of the material cylinder 13, and the other end is connected to the high-pressure pipe 16. The ends of the two high-pressure pipes 16 are connected to the mixing pipe 17 to achieve dual-path grout confluence and pressure stabilization grouting.

[0023] Furthermore, during construction, the concrete grouting material is put into the two material cylinders 13. The corresponding mixing mode is selected according to the characteristics of the grout. The grout is uniformly mixed through the mixing mechanism 3. At the same time, the material adhering to the cylinder wall is scraped off in real time to avoid grout clumping and sedimentation. After the mixing is completed, the pump body 14 is started to transport the uniform grout in the material cylinder 13 to the mixing pipe 17 through the three-way pipe 15 and the high-pressure pipe 16. After being mixed under stable pressure in the mixing pipe 17, it is precisely injected into the void gap between the concrete base and the subgrade layer to complete the dense filling and repair of the void area.

[0024] To achieve real-time scraping of material adhering to the cylinder wall, such as Figures 3-6 As shown, the mixing mechanism 3 includes a linkage component 31, a stirring rod 32, and a guide frame 33. The linkage component 31 includes a lifting rod 311 and a drive seat 312. The drive seat 312 is rotatably mounted on the top side of the housing 11 and is connected to the drive part of the pump body 14 via a linkage shaft to achieve synchronous start-stop and synchronous operation. Specifically, a connecting plate 317 and a connecting block 314 are fixed to the upper and lower ends of the lifting rod 311, respectively. A guide rod 315 is bolted to the outer wall of the connecting block 314. The drive seat 312 has a guide groove 313 inside that cooperates with the guide rod 315. The guide groove 313 is wavy and surrounds the outer surface of the drive seat 312. The connecting plate 317 is rotatably connected to the top of the stirring rod 32 via a bearing, without restricting the rotation of the stirring rod 32.

[0025] To ensure stable lifting of the lifting rod 311, a limiting platform is installed between the two material cylinders 13. The lifting rod 311 passes through the interior of the limiting platform, and a buffer spring 318 is wound around the outer surface of the lifting rod 311. Specifically, the top end of the buffer spring 318 abuts against the limiting platform, and the bottom end abuts against the bottom limiting step of the lifting rod 311, achieving lifting buffer. A limiting rod 316 is fixed on the top side of the housing 11, passing through the bottom end of the lifting rod 311, to ensure stable vertical movement of the lifting rod 311. The guide frame 33 is fixed on the top side of the material cylinder 13, and the top end of the stirring rod 32 passes through the interior of the guide frame 33. An electric guide shaft 331 that cooperates with the stirring rod 32 is installed inside the guide frame 33. The stirring rod 32 has a second guide groove 34 inside, which consists of a straight groove and a spiral groove, and the adjacent sides of the straight groove and the spiral groove are connected.

[0026] In operation, the pump body 14 starts and drives the drive seat 312 to rotate via the linkage shaft. The guide rod 315 moves along the wave-shaped guide groove 313, driving the lifting rod 311 and the stirring rod 32 to rise and fall. At the same time, the electric guide shaft 331 extends into the spiral groove of the guide groove 34, causing the stirring rod 32 to rotate during the rising and falling process, thereby realizing the composite stirring of the grouting material in the material cylinder 13.

[0027] Furthermore, there are two mixing rods 32, each housed within one of the two material cylinders 13. Two T-pipes 15 are connected to the outlets of the two material cylinders 13, and the other ends of the two T-pipes 15 are connected to the mixing pipe 17 via two high-pressure pipes 16. After being thoroughly mixed by the respective mixing rods 32, the grouting material in the two material cylinders 13 is pumped by the pump body 14 to the T-pipes 15, then flows through the high-pressure pipes 16 into the mixing pipe 17 for final mixing. Finally, the mixture is output through the mixing pipe 17 to the grouting site to fill the voids between the concrete base and the subgrade layer.

[0028] Example 2 Based on Embodiment 1, the stirring rod 32 has a cavity 321 inside, and an adjustment assembly 35 is provided inside the cavity 321. The adjustment assembly 35 consists of an adjustment element 351 and a driving element 352.

[0029] like Figure 5 , Figure 7 and Figure 8 As shown, the adjusting component 351 includes a telescopic shaft 3511 and a scraper 3512. One end of the telescopic shaft 3511 extends to the outside of the stirring rod 32 and is fixed to the scraper 3512. The other end of the telescopic shaft 3511 is fixed with an abutment block 3513 that is linked to the driving component 352. A return spring 3514 is wound around the outer surface of the telescopic shaft 3511. Specifically, the curvature of the scraper 3512 is consistent with the curvature of the inner wall of the material cylinder 13, so that it can completely fit the cylinder wall to scrape the material. The return spring 3514 is wound around the outside of the telescopic shaft 3511. Under normal conditions, the scraper 3512 is pulled to fit against the outer wall of the stirring rod 32 and then retracted and hidden.

[0030] To improve the material hanging effect, the drive component 352 includes a drive motor 3521, a transmission shaft 3522 fixed to the output shaft of the drive motor 3521, and a cam seat 3523 fixed to the outer surface of the transmission shaft 3522. The cam seat 3523 intermittently presses against the abutment block 3513. Specifically, after the drive motor 3521 starts, the transmission shaft 3522 drives the cam seat 3523 to rotate. The cam profile of the cam seat 3523 periodically pushes the abutment block 3513. The abutment block 3513 pushes the scraper 3512 outward through the telescopic shaft 3511 to scrape the material from the inner wall of the material cylinder 13. After the cam seat 3523 rotates past the contact position, the return spring 3514 resets the telescopic shaft 3511 and the scraper 3512. It should be noted that by stopping the rotation of the stirring rod 32, the scraper 3512 is intermittently driven to extend and retract, so that it intermittently contacts the cylinder wall, thereby vibrating the inner wall of the material cylinder 13. This not only improves the cleaning effect, but also cleans the material remaining on its exterior.

[0031] Example 3 To ensure the stable use of the scraper 3512, based on Embodiment 2, the drive component 352 also includes a clamping module and a centrifugal module.

[0032] like Figure 7 and Figure 8 As shown, the centrifuge module includes a centrifuge disc 3524 fixed to the outer surface of the drive shaft 3522. A telescopic groove 35212 is formed inside the centrifuge disc 3524, and a centrifuge rod 35213 slides inside the telescopic groove 35212. A return spring 35214 is installed between one end of the centrifuge rod 35213 and the inner wall of the telescopic groove 35212. Specifically, there are multiple telescopic grooves 35212 and centrifuge rods 35213, which are distributed equidistantly in a ring.

[0033] The clamping module includes a hollow sleeve 3525 and a guide sleeve 3526. A guide rod 3528 is slidably installed inside the sleeve 3525. A clamping block 3527 is fixed to one end of the guide rod 3528, and a spherical surface 35210 is provided at the other end of the guide rod 3528. A conical guide slope 35211 is provided on the inner side of the guide sleeve 3526. A return spring 3529 is wound around the outer surface of the guide rod 3528. A guide rail 353 is fixed on the bottom wall of the cavity 321. Both the abutment block 3513 and the guide sleeve 3526 are slidably connected to the guide rail 353. There are multiple clamping blocks 3527. Specifically, when the drive shaft 3522 rotates, the centrifugal disk 3524 rotates synchronously, and the centrifugal rod 35213 slides outward under the action of centrifugal force, pushing the guide sleeve 3526 to move along the guide rail 353. The tapered guide slope 35211 on the inner side of the guide sleeve 3526 presses against the spherical surface 35210 at the end of the guide rod 3528, causing the guide rod 3528 to slide within the sleeve 3525, which in turn drives the clamping block 3527 to move closer to the telescopic shaft 3511 and clamp and lock it, ensuring the stability of the scraper 3512 in the extended working state.

[0034] Example 4 To further improve the mixing effect of the material in the mixing cylinder 13, based on Example 1, two stirring rods 32 are respectively installed inside the two mixing cylinders 13, and a rotating mechanism 4 is installed between the two mixing cylinders 13. Figure 4 As shown, the rotating mechanism 4 includes a drive motor 41 fixed to the bottom side of the limiting platform, a transmission sleeve 42 rotatably mounted on the top side of the two material cylinders 13, and a transmission wheel 43 fixed to the output shaft of the drive motor 41. The transmission wheel 43 is connected to the two transmission sleeves 42 by a transmission belt 44, and the two stirring rods 32 are splinedly connected to the two transmission sleeves 42 respectively.

[0035] When independent stirring is required, the electric guide shaft 331 extends out of the connection with the stirring rod 32, cutting off the rotational guidance of the stirring rod 32 by the guide frame 33. Then, the drive motor 41 is started, driving the two transmission sleeves 42 to rotate synchronously via the transmission wheel 43 and the transmission belt 44. The transmission sleeves 42, connected by a spline, drive the stirring rod 32 to rotate, achieving synchronous stirring of the materials in the two material cylinders 13. The operation of the rotating mechanism 4 can also be coordinated with the use of the linkage component 31, which can adjust the lifting and lowering of the stirring rod 32, improving the mixing effect of the materials inside the material cylinders 13 in conjunction with the drive of the rotating mechanism 4. It should be noted that the electric guide shaft 331 extends into the second guide groove 34 and connects to the stirring rod 32, while simultaneously adjusting the rotating mechanism 4 to a non-operating state. Furthermore, the height difference between the crests and troughs of the wave-shaped trajectory of the first guide groove 313 is 20mm-50mm, allowing for adjustment of the reciprocating lifting and lowering amplitude of the stirring rod 32. The spiral angle of the spiral groove in guide groove 34 is 30°-60° to control the ratio of rotational speed to lifting speed of stirring rod 32 during lifting and lowering. Buffer spring 318 is a cylindrical spiral compression spring with a spring stiffness of 50N / mm to 200N / mm to meet buffering requirements under different working conditions.

[0036] Combined with appendix Figures 1-8 The working principle of the above embodiments is as follows: When the pump body 14 is working, its drive unit drives the drive seat 312 to rotate through the linkage shaft. Since the guide rod 315 is engaged in the wave-shaped guide groove 313, as the drive seat 312 rotates, the guide rod 315 moves along the wave-shaped trajectory, thereby driving the lifting rod 311 to generate up-and-down reciprocating motion while rotating. The connecting plate 317 at the top of the lifting rod 311 is rotatably connected to the top of the stirring rod 32. Therefore, the stirring rod 32 can be adjusted up and down with the lifting rod 311. During the vertical lifting and lowering process of the stirring rod 32, the electric guide shaft 331 slides along the groove. The straight groove is adapted to the vertical lifting and lowering guide, and the spiral groove converts the vertical displacement into rotational torque, driving the stirring rod 32 to rotate, realizing the synchronous action of lifting and rotating. Under normal operating conditions, the drive motor 3521 drives the transmission shaft 3522 and the cam seat 3523 to rotate at a constant speed. The cam seat 3523 intermittently abuts against the abutment block 3513, pushing the telescopic shaft 3511 to extend and retract outward, causing the scraper 3512 to slide against the inner wall of the material cylinder 13 and scrape off the adhering concrete slurry. After the cam seat 3523 disengages from the abutment, the return spring 3514 pulls the telescopic shaft 3511 to return to its original position, realizing the reciprocating extension and retraction of the scraper 3512 to scrape the material. When it is necessary to adjust the mixing intensity to adapt to slurries of different viscosities, the speed of the drive shaft 3522 increases, driving the centrifugal disc 3524 of the centrifugal module to rotate at high speed. The centrifugal rod 35213 in the telescopic groove 35212 overcomes the elastic force of the return spring 35214 and moves outward centrifugally, pushing the guide sleeve 3526 to move axially. The conical guide slope 35211 on the inner side of the guide sleeve 3526 squeezes the spherical surface 35210 of the guide rod 3528, driving multiple sets of guide rods 3528 to gather inward, driving the clamping block 3527 to tightly clamp and fix the telescopic shaft 3511, limiting the extension and retraction stroke of the telescopic shaft 3511, thereby changing the working radius of the scraper 3512 to adapt to the mixing needs of high viscosity and easily sedimented slurries. After the speed decreases, the centrifugal force disappears, the return spring 35214 and the return spring 2 3529 reset synchronously, the clamping block 3527 loosens, and the scraper 3512 returns to its normal extension and retraction range.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grouting and filling device for gaps between a concrete base and a subgrade layer, comprising a concrete grouting and filling equipment (1) consisting of a casing (11), a base (12), two material cylinders (13), a pump body (14), two T-pipes (15), two high-pressure pipes (16), and a mixing pipe (17), characterized in that: To achieve continuous preparation and stable delivery of grout for repairing voided areas, the machine box (11) is equipped with a mixing mechanism (3) for online processing of the grout state in the material cylinder (13) to ensure the compactness of the grout repair layer; wherein, the grout outlet end of the mixing pipe (17) is configured to be used for pressure-stabilized grouting into the voided gap between the base and the subgrade, and the homogeneous grout processed by the mixing mechanism (3) is continuously injected into the voided area through the pump body (14) to achieve complete filling of the interlayer voids and overall structural repair; The mixing mechanism (3) includes a linkage component (31), a stirring rod (32), and a guide frame (33). The linkage component (31) is connected to the stirring rod (32), and the linkage component (31) is linked to the pump body (14). The guide frame (33) is equipped with an electric guide shaft (331) that guides the stirring rod (32). The stirring rod (32) has a guide groove (34) inside. Through the linkage component (31) and the pump body (14), the stirring rod (32) can be adjusted up and down synchronously during the grouting operation to maintain the homogeneity of the grout. At the same time, the electric guide shaft (331) and the guide groove (34) guide the rotation of the stirring rod (32). The stirring rod (32) has a cavity (321) inside. The cavity (321) is provided with an adjustment component (35) for removing the slurry adhering to the inner wall of the material cylinder (13) to ensure continuous grouting. The adjustment component (35) consists of an adjustment element (351) and a driving element (352).

2. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 1, characterized in that: The linkage component (31) includes a lifting rod (311) and a drive seat (312). The drive seat (312) is rotatably mounted on the top side of the housing (11). The drive seat (312) is connected to the drive part of the pump body (14) through a linkage shaft. The upper and lower ends of the lifting rod (311) are respectively fixed with a connecting plate (317) and a connecting block (314). A guide rod (315) is bolted to the outer wall of the connecting block (314). The drive seat (312) has a guide groove (313) inside that cooperates with the guide rod (315). The connecting plate (317) is rotatably connected to the top end of the stirring rod (32).

3. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 2, characterized in that: The guide groove (313) is wavy in shape and surrounds the outer surface of the drive seat (312). A limiting platform is installed between the two material cylinders (13). The lifting rod (311) passes through the inside of the limiting platform, and a buffer spring (318) is wound around the outer surface of the lifting rod (311). A limiting rod (316) that passes through the bottom end of the lifting rod (311) is fixed on the top side of the machine box (11).

4. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 1, characterized in that: The guide frame (33) is fixed to the top side of the material cylinder (13), the top end of the stirring rod (32) penetrates the interior of the guide frame (33), and the second guide groove (34) is composed of a straight groove and a spiral groove, wherein the straight groove and the spiral groove are connected on adjacent sides.

5. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 1, characterized in that: The adjusting component (351) includes a telescopic shaft (3511) and a scraper (3512). One end of the telescopic shaft (3511) extends to the outside of the stirring rod (32) and is fixed to the scraper (3512). The other end of the telescopic shaft (3511) is fixed with an abutment block (3513) that is linked with the driving component (352). A return spring (3514) is wound around the outer surface of the telescopic shaft (3511).

6. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 5, characterized in that: The drive unit (352) includes a drive motor (3521), a transmission shaft (3522) that fixes the output shaft of the drive motor (3521), and a cam seat (3523) that is fixed to the outer surface of the transmission shaft (3522) and intermittently presses against the abutment block (3513).

7. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 6, characterized in that: The drive unit (352) further includes a clamping module and a centrifugal module. The centrifugal module is installed on the outer surface of the drive shaft (3522) and is used to drive the clamping module to achieve clamping of the telescopic shaft (3511). The centrifugal module includes a centrifugal disc (3524) fixed on the outer surface of the drive shaft (3522). A telescopic groove (35212) is provided inside the centrifugal disc (3524). A centrifugal rod (35213) slides inside the telescopic groove (35212), and a return spring (35214) is installed between one end of the centrifugal rod (35213) and the inner wall of the telescopic groove (35212).

8. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 7, characterized in that: The clamping module includes a hollow sleeve (3525) and a guide sleeve (3526). A guide rod (3528) is slidably installed inside the sleeve (3525), and a clamping block (3527) is fixed to the end of the guide rod (3528). A spherical surface (35210) is provided at the other end of the guide rod (3528). A conical guide slope (35211) is provided on the inner side of the guide sleeve (3526). When the centrifugal disc (352... 4) When the drive shaft (3522) rotates, the scraper (3512) is displaced by the contact between the cam seat (3523) and the abutment block (3513). At the same time, the centrifugal disc (3524) rotates and drives the centrifugal rod (35213) to generate centrifugation. The centrifugal rod (35213) moves outward and pushes the guide sleeve (3526) to move, thereby driving the guide rod (3528) to drive the clamping block (3527) to fit against the telescopic shaft (3511).

9. The grouting filling device for the void between the concrete base and the subgrade layer according to claim 8, characterized in that: A reset spring (3529) is wound around the outer surface of the guide rod (3528), a guide rail (353) is fixed on the inner bottom wall of the cavity (321), the abutment block (3513) and the guide sleeve (3526) are slidably connected to the guide rail (353), and there are multiple clamping blocks (3527).

10. A grouting filling device for voids between a concrete base and a subgrade layer according to claim 3, characterized in that: A support leg (2) is installed between the chassis (11) and the base (12). There are two stirring rods (32) and they are respectively set in the two material cylinders (13). A rotating mechanism (4) is set between the two material cylinders (13). The rotating mechanism (4) includes a drive motor (41) fixed to the bottom side of the limiting platform, a transmission sleeve (42) rotatably installed on the top side of the two material cylinders (13), and a transmission wheel (43) fixed on the output shaft of the drive motor (41). The transmission wheel (43) and the two transmission sleeves (42) are connected by a transmission belt (44). The two stirring rods (32) are splinedly connected to the two transmission sleeves (42). When the rotating mechanism (4) is working, the electric guide shaft (331) is pushed out to connect with the stirring rod (32). When the electric guide shaft (331) is connected with the stirring rod (32), the rotating mechanism (4) is adjusted to a non-working state.

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