High-pressure grouting reinforcement equipment for foundation pile

Abstract

The invention discloses high-pressure grouting reinforcement equipment for a foundation pile, and relates to the technical field of bridge foundation pile grouting reinforcement. Comprising a bottom plate, a rotating pipe, a clamping piece, a transmission mechanism, a slurry discharging pipe, a slurry storage tank and a slurry storage tank, by means of the integrated structural design of a drill bit and the slurry discharging pipe, grouting operation can be carried out immediately after the punching procedure is finished, the time-consuming link of equipment position adjustment and procedure connection is omitted, and the construction efficiency is effectively improved; when the top plate of the karst cave collapses and the bottom plate inclines along with the collapse, part of the heavy blocks slide under the action of gravity and are separated from the limiting ring, so that the limiting constraint on each eccentric shaft is relieved; at the moment, the eccentric shaft is subjected to reverse acting force in the process of driving the gear ring to rotate, rotates and breaks away from the tooth gap of the gear ring, and power transmission to the rotating pipe is interrupted; according to the design, reaction torque impact generated by relative movement of the drill bit and soil can be avoided, and the service life of the servo motor is effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of bridge foundation pile grouting reinforcement technology, and in particular to a high-pressure grouting reinforcement device for foundation piles. Background Technology

[0002] In the field of bridge construction, foundation piles are the core load-bearing components supporting the superstructure of bridges. Underground karst caves can cause significant damage to bridge foundation piles in karst areas. If the roof slab of a karst cave is not thick enough or has low strength, it is very easy for it to penetrate or collapse during the construction or operation of the foundation piles, directly leading to a sharp drop in the bearing capacity of the foundation piles and endangering the safety of the bridge structure.

[0003] Existing grouting reinforcement techniques for karst caves require drilling holes in the cave's roof to allow grouting holes to penetrate the roof and extend into the cave. Grouting pipes are then inserted to inject grout, thereby filling the cave's cavities and increasing the roof's strength. However, this technique has technical drawbacks:

[0004] First, the construction process is complicated. After drilling is completed, the drill bit must be lifted, the equipment position adjusted, and the grouting pipe lowered. The connection between the procedures takes a long time and affects the construction efficiency.

[0005] Second, the roof of the karst cave is prone to collapse due to its own strength defects and external loads, which can lead to problems such as borehole trajectory deviation, grout leakage, and pipeline rupture. Therefore, it is necessary to conduct real-time leveling of the grouting reinforcement equipment. When the equipment tilts, the drilling motor needs to be started and stopped. During the slow shutdown of the motor, the relative movement between the drill bit and the soil will generate a counter-torque. This reverse load will not only cause the motor to switch from electric mode to regenerative braking mode, causing the bus voltage to rise and impacting the frequency converter, driver and other drive circuits, but will also directly damage the motor rotor and output shaft, reducing the service life of the equipment.

[0006] To address these issues, we designed a high-pressure grouting reinforcement device for foundation piles. Summary of the Invention

[0007] In response to the above situation and to overcome the shortcomings of existing technology, this invention provides a high-pressure grouting reinforcement device for foundation piles. First, it adopts an integrated structure design of drill bit and grouting pipeline, which allows grouting operation to be carried out directly after drilling, eliminating the time-consuming steps of equipment position adjustment and process connection, and improving construction efficiency. Second, when the equipment tilts, the power transmission to the drill bit is actively cut off through the transmission mechanism, thereby avoiding the risk of damage to the motor caused by sudden torque changes.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A high-pressure grouting reinforcement device for foundation piles includes: a base plate, a rotating pipe, clamping components, a transmission mechanism, a grout discharge pipe, a mud storage tank, and a slurry storage tank; the rotating pipe is rotatably mounted, and a toothed ring is fixed to the rotating pipe, with male threads on its inner wall; a transmission ring is provided at the lower end of the inner wall of the rotating pipe, and the transmission ring has a rectangular through-hole inside; two clamping components are provided, one of which can move up and down; the other clamping component is fixed at a specific position;

[0010] The slurry discharge pipe is rectangular; multiple openings are made at the lower end of the slurry discharge pipe, and the lower end is connected to the drill bit; a lower cover and an upper cover are respectively installed at the upper and lower ends of the slurry discharge pipe; the lower cover is connected to the mud storage tank through a return pipe, and the mud storage tank and slurry storage tank deliver mud and slurry to the slurry discharge pipe and the mud pipe through the upper cover; the lower end of the mud pipe is connected to a branch pipe, and the branch pipe is in a blocked state when no mud is injected into the hole; a rectangular tube is set at the lower end of the slurry discharge pipe, and the wall of the rectangular tube has a slurry outlet corresponding to the opening on the upper part of the slurry discharge pipe; the rectangular tube is supported by a spring, and initially the rectangular tube blocks the opening of the slurry discharge pipe;

[0011] The transmission mechanism provides rotational power to the rotating tube. When the base plate is tilted, the transmission mechanism no longer provides rotational power to the rotating tube.

[0012] In one embodiment, the base plate is slidably mounted on the cargo box of a truck sideboard. When the top of the cave needs to be rotated, part of the base plate is pulled out so that the drill bit aligns with the top of the cave.

[0013] In one embodiment, one of the clamping members is fixed to a tubular mounting plate, the female thread of which engages with the male thread; the other clamping member is fixed to an assembly ring, the assembly ring being rotatably connected to a rotating tube, and a positioning post penetrating the mounting plate.

[0014] In one embodiment, the clamping component comprises an annular plate, cylinders, abutments, a rotating plate, and grippers; cylinders are arranged opposite each other at both ends of the top surface of the annular plate, and abutments are installed on the telescopic shafts of the two cylinders. The two abutments are fitted together to form an annular structure; the rotating plate is rotatably mounted on the inner ring of the annular plate, and two grippers are slidably arranged on its top surface. An elastic element is arranged at the sliding connection. The two grippers are also annular when they are fitted together, and its inner ring is a rectangular structure.

[0015] In one embodiment, two relatively distributed arc-shaped magnets, magnet one and magnet two, are respectively provided on the bottom surfaces of the annular plate and the rotating plate, with the S pole and N pole of magnet one and magnet two being arranged opposite to each other.

[0016] In one embodiment, the slurry discharge pipe is made of multiple sections of corrugated steel pipe spliced ​​together by pins, and the connection between adjacent corrugated steel pipes is fastened by symmetrically arranged screws.

[0017] In one embodiment, the mud storage tank is rotatably connected to the mud pipe via a connecting pipe 1 penetrating the top cover; the slurry storage tank extends into the slurry discharge pipe via a connecting pipe 2 penetrating the top cover.

[0018] In one embodiment, the lower end of the slurry discharge pipe has an opening two corresponding to the nozzles of each branch pipe; a baffle is rotatably mounted inside the lower end of the slurry discharge pipe, and a torsion spring is provided at the rotatable connection between the baffle and the slurry discharge pipe; the baffle has several discharge ports along its own axis; when the slurry discharge pipe rotates at high speed, the baffle rotates under the action of centrifugal force, and after rotating to a preset angle, it is constrained by a limiting structure so that the discharge ports are aligned with the opening two at the lower end of the slurry discharge pipe.

[0019] In one embodiment, the transmission mechanism includes a lower housing, an upper housing, a limiting block, an eccentric shaft, a slide rail, a weight, a limiting ring, and a second spring. The lower housing and the upper housing are both through-type structures at their axial centers and are rotatably connected. A servo motor drives the lower housing to rotate via a chain and sprocket mechanism, while the upper housing is fixed to the base plate. Multiple eccentric shafts are provided, equidistantly distributed along the axial center of the inner ring of the lower housing. One end of each shaft is rotatably connected to the lower housing, and a torsion spring is installed at the rotatable connection. The other end is inserted into a gear ring. The teeth of the gear ring are rounded, and the tooth spacing is greater than the diameter of the eccentric shaft. A spring rod is connected to the eccentric shaft, with one end of the spring rod... The limit blocks extend into the lower housing; the number of limit blocks is the same as that of the eccentric shaft, and they are all slidably assembled in the lower housing. One end of the top surface of the limit ring is a sloping structure, and a strike rod is fixed at the end facing the axis of the lower housing. The position of the strike rod corresponds to that of the spring rod; the edge of the limit ring extends downward and can press down on each limit block. The top edge of the limit ring is raised upward; the two ends of the second spring are respectively connected to the upper housing and the limit ring; multiple slide rails are provided in the upper housing and are arranged at equal intervals along the axis of the upper housing; a third spring is arranged between the slide rail and the slider, and the weight and the slider form an up-and-down sliding connection; the total weight of the multiple weights presses down on the lower part of the limit ring.

[0020] In one embodiment, the number of slide rails is eight, corresponding to the eight directions: east, south, west, north, southeast, northeast, southwest, and northwest.

[0021] The beneficial effects of this invention are as follows:

[0022] (1) After the drilling operation is completed, the grout pipe can be directly lowered to the bottom of the cave. Based on the integrated structure design of the drill bit and the grout pipe, the grouting operation can be carried out immediately after the drilling process, saving the time-consuming links of equipment position adjustment and process connection, and effectively improving construction efficiency.

[0023] (2) When the top of the karst cave collapses and the bottom plate tilts accordingly, some of the heavy blocks slide under the action of gravity and separate from the limiting ring, thereby releasing the limiting constraint on each eccentric shaft. At this time, the eccentric shaft is subjected to a reverse force during the rotation of the driving gear ring, causing it to rotate and disengage from the tooth gap of the gear ring, interrupting the power transmission to the rotating tube; this design can avoid the counter-torque impact generated by the relative movement of the drill bit and the soil, effectively ensuring the service life of the servo motor. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of one side of the structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the rotating tube of the present invention;

[0027] Figure 4 This is a schematic diagram of the rotating pipe structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the spatial arrangement of the first clamping member and the second clamping member of the present invention;

[0029] Figure 6 This is an exploded structural diagram of the first clamping member of the present invention;

[0030] Figure 7 This is a schematic diagram of the external structure of the slurry discharge pipe of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the slurry discharge pipe of the present invention;

[0032] Figure 9 This is a schematic diagram of the mud circulation flow of the present invention;

[0033] Figure 10 This is a schematic diagram of the internal structure of the lower housing in the rotating mechanism of the present invention;

[0034] Figure 11 This is a schematic diagram of the internal structure of the upper housing in the rotating mechanism of the present invention;

[0035] Figure 12 This is a schematic diagram of the limiting ring structure of the present invention;

[0036] Figure 13 This is a schematic diagram of the internal structure of the rotating mechanism of the present invention.

[0037] In the diagram: 1. Base plate; 11. Frame; 12. Bracket; 2. Rotary tube; 21. Transmission ring; 22. Gear ring; 23. Mounting plate; 24. Assembly ring; 20. Boss; 3. Clamping component; 3-1. First clamping component; 3-2. Second clamping component; 30. Positioning pin; 31. Annular plate; 32. Cylinder; 33. Clamping block; 34. Rotating plate; 35. Gripper; 36. Magnet one; 37. Magnet two; 4. Transmission mechanism; 41. Lower housing; 42. Upper housing; 43. Limiting block; 44. Eccentric shaft; 45. Slide 46. ​​Rail; 47. Weight; 48. Limiting ring; 49. Spring II; 431. Impact rod; 441. Spring rod; 451. Sliding block; 471. Lower pressing part; 5. Slurry discharge pipe; 50. Mud pipe; 51. Drill bit; 52. Lower cover; 53. Upper cover; 54. Baffle; 55. Rectangular tube; 501. Branch pipe; 541. Discharge port; 551. Slurry outlet; 552. Spring I; 6. Mud storage tank; 61. Connecting pipe I; 62. Return pipe; 63. Filter screen; 7. Slurry storage tank; 71. Connecting pipe II; 8. Servo motor. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0039] First embodiment:

[0040] Please see Figure 1-2 This invention discloses a high-pressure grouting reinforcement device for foundation piles, comprising: a base plate 1, a rotating pipe 2, a clamping component 3, a transmission mechanism 4, a grout discharge pipe 5, a mud storage tank 6, and a slurry storage tank 7.

[0041] Please see Figure 1-2 The base plate 1 is slidably mounted on the cargo box of the truck; the rotating pipe 2 is vertically fixed to the base plate 1 via the frame 11 and can rotate around its own axis. A circular through-hole is opened on the wall of the base plate 1 corresponding to the rotating pipe 2. The rotating pipe 2 provides rotational driving force for the slurry discharge pipe 5 on the one hand, and on the other hand, it works with the clamping part 3 to drive the slurry discharge pipe 5 to complete the vertical lifting and lowering movement; the transmission mechanism 4 outputs initial rotational power from the servo motor 8 and drives the rotating pipe 2 to rotate synchronously; when the base plate 1 collapses and tilts, the transmission mechanism 4 immediately stops transmitting power to the rotating pipe 2; the mud storage tank 6 and the slurry storage tank 7 are installed on the base plate 1 via the bracket 12. The mud storage tank 6 supplies mud to the slurry discharge pipe 5 for mud circulation and slag discharge during drilling operations, and the slurry storage tank 7 supplies slurry to the slurry discharge pipe 5 for filling and reinforcing the karst cave.

[0042] Please see Figure 3-4 The lower end of the rotating tube 2 is fixed with a toothed ring 22, and the inner wall of the ring is machined with male threads; the lower end of the inner wall of the rotating tube 2 is provided with a transmission ring 21, the inside of which is a rectangular through-hole, and the lower end of the inner wall is also provided with a boss 20 extending towards the axis.

[0043] Please see Figure 3 , Figure 5 The clamping components 3 consist of two parts: a first clamping component 3-1 and a second clamping component 3-2. Both are built inside the rotating tube 2, with the first clamping component 3-1 positioned above the second clamping component 3-2. The first clamping component 3-1 is fixed to the tubular mounting plate 23, whose external female thread engages with the internal male thread of the rotating tube 2. The second clamping component 3-2 is fixed to the assembly ring 24, which overlaps the boss 20 of the rotating tube 2. The assembly ring 24 has a positioning post 30 on it, which passes through the mounting plate 23 and is fixedly connected to the frame 11. When the rotating tube 2 rotates, the mounting plate 23 drives the first clamping component 3-1 to move vertically, while the second clamping component 3-2 remains in a fixed position.

[0044] Please see Figure 6 The clamping component 3 comprises an annular plate 31, a cylinder 32, a clamp 33, a rotating plate 34, grippers 35, a magnet 36, and a magnet 37. Cylinders 32 are arranged opposite each other at both ends of the top surface of the annular plate 31. Each of the telescopic shafts of the two cylinders 32 is fitted with a clamp 33, and the two clamps 33 form an annular structure when they are in contact. The rotating plate 34 is rotatably mounted on the inner ring of the annular plate 31, and two oppositely distributed grippers 35 are slidably arranged on its top surface. An elastic element is configured at the sliding connection. The two grippers 35 also form an annular structure when they are in contact, and their inner ring is rectangular. The cylinders 32 drive the clamps 33 to move towards each other, pushing the two grippers 35 to fit together, thereby clamping the slurry discharge pipe 5. When the slurry discharge pipe 5 rotates, the two grippers 35 rotate synchronously with it via the rotating plate 34.

[0045] Two arc-shaped magnets, 36 and 37, are respectively arranged oppositely on the bottom surfaces of the annular plate 31 and the rotating plate 34, with the S and N poles of magnets 36 and 37 facing each other. When the cylinder 32 drives the clamp 33 to retract, the two grippers 35 move away from each other under the action of the elastic element. Since the grippers 35 have rotated synchronously with the discharge pipe 5, their angle cannot be guaranteed to be aligned with the clamp 33. At this time, with the help of the magnetic attraction of magnets 36 and 37, the two grippers 35 can be aligned with the two clamps 33 and kept in the same straight line.

[0046] Please see Figure 7The figure shows the external structure of the slurry discharge pipe 5. The slurry discharge pipe 5 vertically descends and passes through the first clamping member 3-1, the second clamping member 3-2, the transmission ring 21, and the base plate 1. The cross-section of the slurry discharge pipe 5 is rectangular to facilitate the transmission of rotational power from the transmission ring 21. The slurry discharge pipe 5 is constructed from multiple sections of corrugated steel pipe joined together by pins, with adjacent corrugated steel pipes fastened by symmetrically arranged screws. Multiple openings are provided at the lower end of the slurry discharge pipe 5 for slurry discharge. A drill bit 51 is connected to the lower end; when the slurry discharge pipe 5 rotates at high speed, the drill bit can be used to drill holes in the top plate of the karst cave. A lower cover 52 and an upper cover 53 are respectively mounted at the upper and lower ends of the slurry discharge pipe 5. The lower cover 52 and the slurry discharge pipe 5 are circumferentially rotating and axially slidingly connected. When the slurry discharge pipe 5 rotates, it will not cause the lower cover 52 to rotate synchronously, and it can rotate relative to the lower cover. The drill bit 51 moves vertically back and forth. The diameter of the lower cover 52 is larger than that of the drill bit 51, and it is connected to the lower end of the mud storage tank 6 through the return pipe 62. The upper cover 53 is rotatably connected to the upper end of the slurry discharge pipe 5. The mud storage tank 6 passes through the upper cover 53 through the connecting pipe 1 61, extends downward into the slurry discharge pipe 5, and is rotatably connected to the mud pipe 50 inside the pipe. The slurry storage tank 7 passes through the upper cover 53 through the connecting pipe 2 71, and extends into the slurry discharge pipe 5. Both the connecting pipe 1 61 and the connecting pipe 2 71 are reserved with a certain margin, so that they can move vertically synchronously with the slurry discharge pipe 5. Both the connecting pipe 1 61 and the connecting pipe 2 71 are equipped with slurry pumps. The mud in the mud storage tank 6 and the slurry in the slurry storage tank 7 can be injected into the slurry discharge pipe 5 through the two slurry pumps, so as to realize the mud circulation and slag discharge operation and the grouting reinforcement operation.

[0047] Please see Figure 8The figure shows the internal structure of the slurry discharge pipe 5. The slurry pipe 50 is a metal pipe, with several branch pipes 501 equidistantly connected at its lower end along the axis. Each branch pipe 501 is bent upwards, and each outlet end is equipped with a nozzle. The lower end of the slurry discharge pipe 5 has an opening 2 corresponding to each nozzle. A baffle 54 is rotatably mounted inside the lower end of the slurry discharge pipe 5. A torsion spring 1 (not shown in the figure) is set at the rotatable connection between the baffle 54 and the slurry discharge pipe 5. The baffle 54 has several outlets 541 along its own axis. When the slurry discharge pipe 5 rotates at high speed, the baffle 54 rotates under the action of centrifugal force. After rotating to a preset angle, it is constrained by a limiting structure, so that the outlets 541 are aligned with the openings 2 at the lower end of the slurry discharge pipe 5. After the slurry discharge pipe 5 stops rotating at high speed, the baffle 54 rotates back under the elastic reset action of the torsion spring 1, and realigns with the openings 2 at the lower end of the slurry discharge pipe 5. The opening at the lower end of the slurry discharge pipe 5 is sealed. A rectangular tube 55 is also installed at the lower end of the slurry discharge pipe 5. The top surface of the rectangular tube 55 is open. The mud pipe 50 passes through the bottom surface of the rectangular tube 55. The tube wall of the rectangular tube 55 has a slurry outlet 551 corresponding to the opening at the upper end of the slurry discharge pipe 5. The rectangular tube 55 is initially supported by a spring 552. At this time, the opening at the upper end of the slurry discharge pipe 5 and the slurry outlet 551 of the rectangular tube 55 are staggered, and the rectangular tube 55 seals the opening at the upper end. When the slurry is injected into the mud pipe 50, the slurry presses down on the rectangular tube 55 by its own weight, so that the opening at the upper end of the slurry discharge pipe 55 is aligned with the slurry outlet 551. The slurry is discharged through the slurry outlet 551 and the opening at the upper end of the slurry discharge pipe 55. An exhaust port is provided on the bottom surface of the rectangular tube 55. During the up and down movement of the rectangular tube 55, the lower end space can be vented or replenished with air through the exhaust port.

[0048] Please see Figure 9 The diagram illustrates the mud circulation and slag removal process. First, the lower cover 52 is embedded into the soil. Then, the rotating pipe 2 starts to rotate, driving the slurry discharge pipe 5 and the lower drill bit 51 to rotate downwards simultaneously to carry out drilling operations. During drilling, the slurry pump mounted on the connecting pipe 61 draws mud from the mud storage tank 6. The mud is transported to each branch pipe 501 through the connecting pipe 61 and the mud pipe 50, and sprayed upwards along the branch pipe 501. The mud flowing upwards in the hole carries mud, sand, and gravel, flows into the lower cover 52, and then flows back to the mud storage tank 6 through the return pipe 62. After being filtered by the filter screen 63, the mud, sand, and gravel are trapped at the lower end of the mud storage tank 6. The filtered mud can be drawn out again by the slurry pump, forming a circulation operation. During this process, the mud flowing in the hole can improve the support strength of the hole sidewall.

[0049] Working principle of this invention:

[0050] Step 1: Equipment positioning and assembly; pull out part of the base plate 1 to align with the area where drilling is required, and complete the segmented assembly of the slurry discharge pipe 5; insert the assembled slurry discharge pipe 5 vertically downwards into the first clamping member 3-1, the second clamping member 3-2, the transmission ring 21 and the base plate 1 in sequence, and the first clamping member 3-1 clamps and fixes the slurry discharge pipe 5, and then embed the lower cover 52 into the soil.

[0051] Step 2: Drilling operation and mud circulation and slag removal; Start the servo motor 8, which drives the rotating pipe 2 to rotate clockwise through the transmission mechanism 4. The rotating pipe 2, together with the first clamping part 3-1, drives the slurry discharge pipe 5 and the lower drill bit 51 to rotate and move downward synchronously to carry out drilling operation; During the drilling process, the slurry pump on the connecting pipe 61 draws mud from the mud storage tank 6. The mud is transported to each branch pipe 501 through the connecting pipe 61 and the mud pipe 50, and sprayed upward along the branch pipe 501; The mud flowing upward in the hole carries mud, sand and stone chips into the lower cover 52, and flows back to the mud storage tank 6 through the return pipe 62. After being filtered by the filter screen 63, the mud, sand and stone chips are trapped at the lower end of the storage tank. The filtered mud can be drawn out again by the slurry pump to form a mud circulation operation.

[0052] Step 3: Lower the slurry discharge pipe to the bottom of the cave; after the drilling operation is completed, stop the slurry delivery, and the second clamping member 3-2 clamps the slurry discharge pipe 5, while the first clamping member 3-1 releases the slurry discharge pipe 5; the servo motor 8 drives the rotating tube 2 to rotate counterclockwise, driving the first clamping member 3-1 to move up to the initial height, the first clamping member 3-1 clamps the slurry discharge pipe 5 again, and the second clamping member 3-2 releases the slurry discharge pipe 5; repeat the above actions until the lower end of the slurry discharge pipe 5 is delivered to the bottom of the cave.

[0053] Step 4: Grouting and reinforcement of the karst cave and lifting of the grout discharge pipe; Start the grout pump on the connecting pipe 2 71 to extract the grout from the grout storage tank 7. The grout enters the grout discharge pipe 5 through the connecting pipe 2 71. The grout's own weight presses down on the rectangular pipe 55, aligning the opening 1 with the grout outlet 551. The grout is discharged through the grout outlet 551 and the opening 1 and fills the karst cave. According to the preset grouting time, the grout discharge pipe 5 needs to be lifted periodically. At this time, the rotating pipe 2 rotates counterclockwise. The first clamping member 3-1 moves the grout discharge pipe 5 up a specified distance and then stops. The second clamping member 3-2 clamps the grout discharge pipe 5. After the first clamping member 3-1 moves down to reset, it clamps the grout discharge pipe 5 again. Repeat the above lifting action to complete the layered grouting and reinforcement of the karst cave.

[0054] Step 5: Equipment disassembly and cleaning; After the grouting and reinforcement work of the karst cave is completed, the grout discharge pipe 5 is disassembled in sections, and the inner and outer walls of the grout discharge pipe 5 and the drill bit 51 are thoroughly cleaned with high-pressure water flow.

[0055] Second embodiment:

[0056] Please see Figure 10-13The transmission mechanism 4 includes a lower housing 41, an upper housing 42, a limiting block 43, an eccentric shaft 44, a slide rail 45, a weight 46, a limiting ring 47, and a spring 48. The lower housing 41 and the upper housing 42 are both through structures at their axial centers and are rotatably connected. The servo motor 8 drives the lower housing 41 to rotate through a chain and sprocket mechanism, while the upper housing 42 is fixed to the base plate 1. Multiple eccentric shafts 44 are provided, equidistantly distributed along the axial center of the inner ring of the lower housing 41, with one end rotatably connected to the lower housing 41. Torque springs are provided at the rotatable connection points. Spring 2 (not shown in the figure), the other end is inserted into the gear ring 22; the tooth ends of the gear ring 22 are rounded, and the tooth spacing is greater than the diameter of the eccentric shaft 44; a spring rod 441 is connected to the eccentric shaft 44, one end of the spring rod 441 extends into the lower housing 41, which can limit the eccentric shaft 44, thereby ensuring the angle when the multiple eccentric shafts 44 drive the rotating tube 2 to rotate through the gear ring 22; the number of limiting blocks 43 is the same as that of the eccentric shafts 44, all of which are slidably assembled in the lower housing 41 and can move towards the axis of the lower housing 41; the limiting blocks A spring is provided at the sliding connection of 43, with one end of its top surface having a sloping structure. A strike rod 431 is fixed at the end facing the axis of the lower housing 41, and the strike rod 431 corresponds to the position of the spring rod 441. The edge of the limiting ring 47 extends downward, and the limiting ring 47 moves in the vertical direction to press down each limiting block 43, so that the strike rod 431 and the spring rod 441 are separated. The top edge of the limiting ring 47 bulges upward to form a pressing part 471. The two ends of the second spring 48 are respectively connected to the upper housing 42 and the limiting ring 47. The upper housing 42 is equipped with Multiple slide rails 45 are arranged equidistantly along the axis of the upper housing 42. The number of slide rails 45 is preferably eight, corresponding to the eight directions of east, south, west, north, southeast, northeast, southwest, and northwest. A spring is arranged between the slide rail 45 and the slider 451. The weight 46 and the slider 451 form an up-and-down sliding connection, and the opposite surface of the weight 46 is an inclined slope. The total weight of the multiple weights 46 presses down on the pressing part 471 of the limiting ring 47, which stretches the spring 48, thereby achieving the limiting effect on each limiting block 43.

[0057] Working principle of this invention:

[0058] If the top of the cave collapses, causing the bottom plate 1 to tilt, some of the weights 46 will slide along the slide rail 45 under the force of gravity, separating from the pressing part 471 of the limiting ring 47. This action reduces the pressure above the limiting ring 47, and the second spring 48 will pull the limiting ring 47 upward to reset, thereby releasing the downward pressure on each limiting block 43. Each limiting block 43 will move towards the axis of the lower housing 41 under the action of the spring plate, and will impact the spring rod 441 through the impact rod 431 and compress it, releasing the limiting constraint on each eccentric shaft 44. At this time, the eccentric shaft 44 will be subjected to a reverse force during the rotation of the driving gear ring 22, causing it to rotate and disengage from the tooth gap of the gear ring 22, interrupting the power transmission to the gear ring 22 and the rotating tube 2. In this state, the servo motor 8 can slowly decelerate to a stop, avoiding the reverse torque impact caused by the relative movement between the drill bit and the soil, and ensuring the service life of the servo motor 8.

[0059] When the base plate 1 returns to a horizontal state, the spring three in the slide rail 45 elastically resets, pulling the weight 46 back to its initial position. During the reset process of the weight 46, its slope contacts the edge of the limiting ring 47, and the weight 46 rises upward to avoid it, further moving to the lower pressing part 471 of the limiting ring 47. Subsequently, the total weight of the multiple weights 46 applies downward pressure to the limiting ring 47 again, and the limiting ring 47 presses down on the slope structure of the limiting block 43, driving the limiting block 43 to reset in a direction away from the axis. Finally, the eccentric shaft 44 rotates back to its initial angle under the action of the torsion spring two, and the spring rod 441 passes through the lower housing 41 again, thus completing the reset action of the entire transmission mechanism 4.

Claims

1. A high-pressure grouting reinforcement device for foundation piles, comprising: The components are: a base plate (1), a rotating pipe (2), a clamping component (3), a transmission mechanism (4), a slurry discharge pipe (5), a mud storage tank (6), and a slurry storage tank (7); characterized in that: the rotating pipe (2) is rotatably mounted, and a toothed ring (22) is fixedly mounted on the rotating pipe (2), with a male thread on its inner wall; a transmission ring is provided at the lower end of the inner wall of the rotating pipe (2), and the inside of the transmission ring is a rectangular through-hole; two clamping components (3) are provided, one of which can move up and down; the other clamping component (3) is fixed at a specific position; The discharge pipe (5) is rectangular; the lower end of the discharge pipe (5) has multiple openings and the lower end is connected to the drill bit (51); the upper and lower ends of the discharge pipe (5) are respectively equipped with a lower cover (52) and an upper cover (53); the lower cover (52) is connected to the mud storage tank (6) through the return pipe (62), and the mud storage tank (6) and the slurry storage tank (7) deliver mud and slurry to the discharge pipe (5) and the mud pipe (50) through the upper cover (53); the lower end of the mud pipe (50) is connected to the branch pipe (501), and the branch pipe (501) is in a blocked state when no mud is injected into the hole; a rectangular pipe (55) is set at the lower end of the discharge pipe (5), and the wall of the rectangular pipe (55) has a slurry outlet (551) corresponding to the opening on the upper end of the discharge pipe (5); the rectangular pipe (55) is supported by a spring (552), and initially the rectangular pipe (55) blocks the opening of the discharge pipe (5); The transmission mechanism (4) provides rotational power to the rotating tube (2). When the base plate (1) is tilted, the transmission mechanism (4) no longer provides rotational power to the rotating tube (2).

2. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: The base plate (1) is slidably mounted on the cargo box of the truck sideboard. When the top plate of the cave needs to be rotated, part of the base plate (1) is pulled out so that the drill bit (51) corresponds to the top plate of the cave.

3. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: One of the clamping members (3) is fixed to the tubular mounting plate (23), the female thread of which engages with the male thread; the other clamping member (3) is fixed to the assembly ring (24), the assembly ring (24) is rotatably connected to the rotating tube (2), and the positioning post (30) penetrates the mounting plate (23).

4. The high-pressure grouting reinforcement equipment for foundation piles according to claim 3, characterized in that: The clamping component (3) comprises an annular plate (31), a cylinder (32), a clamp (33), a rotating plate (34), and a gripper (35). The cylinders (32) are arranged opposite each other on the top surface of the annular plate (31). Each of the two cylinders (32) has a clamp (33) installed on its telescopic shaft. The two clamps (33) are fitted together to form an annular structure. The rotating plate (34) is rotatably mounted on the inner ring of the annular plate (31). Two grippers (35) are slidably arranged on its top surface. An elastic element is arranged at the sliding connection. The two grippers (35) are also annular after they are fitted together, and its inner ring is a rectangular structure.

5. The high-pressure grouting reinforcement equipment for foundation piles according to claim 4, characterized in that: The bottom surfaces of the annular plate (31) and the rotating plate (34) are respectively provided with two relatively distributed arc-shaped magnets, one (36) and two (37), and the S pole and N pole of magnet one (36) and magnet two (37) are arranged opposite to each other.

6. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: The slurry discharge pipe (5) is made of multiple sections of corrugated steel pipe spliced ​​together by pins, and the connection between adjacent corrugated steel pipes is fastened by symmetrically arranged screws.

7. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: The mud storage tank (6) is rotatably connected to the mud pipe (50) by passing through the upper cover (53) via the first connecting pipe (61); the slurry storage tank (7) is extended into the slurry discharge pipe (5) by passing through the upper cover (53) via the second connecting pipe (71).

8. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: The lower end of the discharge pipe (5) is provided with an opening two corresponding to the nozzles of each branch pipe (501); a baffle (54) is rotatably mounted inside the lower end of the discharge pipe (5), and a torsion spring (552) is provided at the rotatable connection between the baffle (54) and the discharge pipe (5). The baffle (54) is provided with several discharge ports (541) along its own axis; when the discharge pipe (5) rotates at high speed, the baffle (54) rotates under the action of centrifugal force. After rotating to a preset angle, it is constrained by the limiting structure so that the discharge ports (541) are aligned with the opening two at the lower end of the discharge pipe (5).

9. The high-pressure grouting reinforcement equipment for foundation piles according to claim 1, characterized in that: The transmission mechanism (4) includes a lower housing (41), an upper housing (42), a limiting block (43), an eccentric shaft (44), a slide rail (45), a weight (46), a limiting ring (47), and a second spring (48). The lower housing (41) and the upper housing (42) are connected at their axial centers and are rotatably connected. The servo motor drives the lower housing (41) to rotate through a chain and sprocket mechanism, while the upper housing (42) is fixed to the base plate (1). The eccentric shaft (44) is provided in multiple parts, which are equidistantly distributed along the axial center of the inner ring of the lower housing (41). One end of the shaft is rotatably connected to the lower housing (41), and a second torsion spring (48) is provided at the rotatable connection. The other end is inserted into the gear ring (22). The tooth ends of the gear ring (22) are rounded, and the tooth spacing is greater than the diameter of the eccentric shaft (44). A spring rod (441) is connected to the eccentric shaft (44), and one end of the spring rod (441) extends into the lower housing (41). 1) Inside; the number of limiting blocks (43) is the same as that of the eccentric shaft (44), and they are all slidably assembled in the lower housing (41). One end of the top surface is a slope structure, and the end facing the axis of the lower housing (41) is fixed with a strike rod (431). The position of the strike rod (431) corresponds to that of the spring rod (441). The edge of the limiting ring (47) extends downward and can press down each limiting block (43). The top edge of the limiting ring (47) is raised upward. The two ends of the second spring (48) are respectively connected to the upper housing (42) and the limiting ring (47). Multiple slide rails (45) are provided in the upper housing (42) and are arranged at equal intervals along the axis of the upper housing (42). A third spring is arranged between the slide rail (45) and the slider (451). The weight (46) and the slider (451) form an up-and-down sliding connection. The total weight of the multiple weights (46) presses down the pressing part (471) of the limiting ring (47).

10. The high-pressure grouting reinforcement equipment for foundation piles according to claim 9, characterized in that: The number of slide rails (45) is eight, corresponding to the eight directions of east, south, west, north, southeast, northeast, southwest and northwest.

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