A nozzle structure for high-pressure jet grouting pile construction

Abstract

This utility model relates to the technical field of high-pressure jet grouting pile construction equipment, and particularly to a nozzle structure for high-pressure jet grouting pile construction. The technical solution includes: a drill rod, with a drill bit at one end; a grout delivery pipe inside the drill rod; a diversion pipe at the top of the grout delivery pipe; a nozzle assembly at each end of the diversion pipe away from the grout delivery pipe; a connecting assembly on the grout delivery pipe; and an adjustment assembly on the outer ring of the drill rod. This utility model, through the coordinated arrangement of the grout delivery pipe, diversion pipe, and nozzle assembly, enables multi-directional high-pressure jet grouting operations, thereby improving the bearing capacity and stability of the foundation and enhancing pile formation quality. The adjustment assembly allows for adjustment of the nozzle assembly's spray angle, enabling the high-pressure nozzle to be flexibly adjusted according to different construction environments and engineering requirements, greatly expanding the applicability of the high-pressure nozzle and improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of high-pressure jet grouting pile construction equipment, and in particular to a nozzle structure for high-pressure jet grouting pile construction. Background Technology

[0002] High-pressure jet grouting, a commonly used foundation treatment method, involves injecting cement grout into the soil layer through a high-pressure rotating nozzle, mixing it with the soil to form a continuously overlapping cement-reinforced body, thereby improving the bearing capacity and stability of the foundation. In actual construction, the performance of the nozzle structure plays a crucial role in the quality of pile formation and construction efficiency. Currently, existing high-pressure jet grouting nozzle structures on the market are prone to allowing foreign matter such as clay and gravel from the strata to enter and clog the nozzle, causing poor grouting or water spraying. This not only requires frequent cleaning and maintenance, increasing construction costs and time, but may also lead to defects in the pile quality. Furthermore, existing nozzle structures are not convenient for angle adjustment, making it difficult to meet diverse engineering needs. Therefore, we propose a new nozzle structure for high-pressure jet grouting pile construction. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a nozzle structure for high-pressure jet grouting pile construction.

[0004] The technical solution of this utility model is as follows: A nozzle structure for high-pressure jet grouting pile construction includes a drill rod, a drill bit at one end of the drill rod, a grout delivery pipe inside the drill rod, a diversion pipe at the top of the grout delivery pipe, a nozzle assembly at each end of the diversion pipe away from the grout delivery pipe, each nozzle assembly including a nozzle pipe, a high-pressure nozzle at the top of the nozzle pipe, a positioning sleeve on the outer ring of the nozzle pipe, a connecting assembly on the grout delivery pipe including a connecting sleeve, multiple adjusting cylinders on the outer ring of the connecting sleeve, an inner cylinder inside the adjusting cylinder, a return spring between one end of the inner cylinder and the adjusting cylinder, a connecting push plate at the end of the inner cylinder away from the return spring, an inner frame inside the drill rod, an adjusting assembly on the outer ring of the drill rod including a fixing ring, multiple cylinders on one side below the fixing ring, and an adjusting sleeve at the output end of the cylinder.

[0005] Preferably, the mounting end of the drill bit is installed corresponding to one end of the drill rod, the mounting end of the inner frame is installed corresponding to the inner cavity of the drill rod near the drill bit, the outer ring of the grout delivery pipe is installed corresponding to the inner ring of the inner frame, and the mounting end of the diversion pipe is installed corresponding to the top end of the grout delivery pipe.

[0006] Preferably, the inner ring of the nozzle is installed correspondingly to the outer ring of each end of the split pipe, the mounting end of the high-pressure nozzle is installed correspondingly to one end of the nozzle, the high-pressure nozzle and the split pipe are in a through-hole configuration, the outer ring of the nozzle has an installation groove, the mounting end of the positioning sleeve is installed correspondingly to the installation groove, two sets of positioning pins are provided on the outer side of the positioning sleeve, the inner frame has a positioning groove, both sides of the inner wall of the positioning groove have positioning holes, and the top of the positioning pin is installed correspondingly to the positioning hole.

[0007] Preferably, the mounting end of the connecting sleeve is installed corresponding to the outer ring of the slurry delivery pipe, the mounting end of the adjusting cylinder is installed corresponding to the connecting sleeve, the outer ring of the inner cylinder is in close contact with the inner wall of the adjusting cylinder, one end of the outer ring of the inner cylinder is provided with multiple sets of sliders, the inner wall of the adjusting cylinder is provided with multiple sets of sliding grooves, and the sliders are installed corresponding to the sliding grooves.

[0008] Preferably, the two ends of the return spring are respectively installed corresponding to one end of the inner cylinder and the inner wall of the adjusting cylinder, the end of the inner cylinder away from the adjusting cylinder is installed corresponding to the connecting push plate, and the mounting end of the connecting push plate is installed corresponding to the outer side of the nozzle.

[0009] Preferably, each of the drill rods has an opening slot at the position corresponding to the positioning slot, and the nozzle assembly corresponds to the opening slot when in operation.

[0010] Preferably, the mounting end of the fixing ring is installed corresponding to the outer ring of the drill rod, multiple sets of assembly grooves are provided on the lower side of the fixing ring, the mounting end of the cylinder is installed corresponding to the assembly groove, the inner ring of the adjusting sleeve is tightly fitted to the outer wall of the drill rod, multiple sets of oblique grooves are provided on the adjusting sleeve, and the output end of the cylinder is installed corresponding to the upper side of the adjusting sleeve.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This utility model has a compact overall structure. Through the coordinated arrangement of the grout delivery pipe, the diversion pipe, and the nozzle assembly, high-pressure jet grouting operations can be carried out in multiple directions, thereby improving the bearing capacity and stability of the foundation and enhancing the quality of pile formation. By adjusting the components, the spray angle of the nozzle assembly can be adjusted, allowing the high-pressure nozzle to be flexibly adjusted according to different construction environments and engineering requirements. This greatly enhances the applicability of the high-pressure nozzle, meets diverse engineering needs, improves construction efficiency, and also protects the nozzle assembly from soil blockage, extending its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2This is a cross-sectional view of the present invention;

[0015] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0016] Figure 4 This is an exploded view of the structure of this utility model;

[0017] Figure 5 This is an exploded view of the nozzle assembly in this utility model;

[0018] Figure 6 This is a schematic diagram of the inner frame in this utility model.

[0019] Reference numerals in the attached drawings: 1. Drill rod; 2. Drill bit; 3. Grout delivery pipe; 4. Diverter pipe; 5. Nozzle assembly; 51. Nozzle pipe; 52. High-pressure nozzle; 53. Positioning sleeve; 54. Positioning pin; 6. Connecting assembly; 61. Connecting sleeve; 62. Adjusting cylinder; 63. Inner cylinder; 64. Return spring; 7. Inner frame; 8. Adjusting assembly; 81. Fixing ring; 82. Cylinder; 83. Adjusting sleeve. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example

[0022] like Figure 1-6 As shown, the present invention proposes a nozzle structure for high-pressure jet grouting pile construction, including a drill rod 1, a drill bit 2 at one end of the drill rod 1, the mounting end of the drill bit 2 being installed correspondingly to one end of the drill rod 1, the drill bit 2 being fixedly connected to the drill rod 1, an inner frame 7 being provided inside the drill rod 1, the mounting end of the inner frame 7 being installed correspondingly to the inner cavity of the drill rod 1 near the drill bit 2, the outer ring of the inner frame 7 being fixedly connected to the inner wall of the drill rod 1, and a grout delivery pipe 3 being provided inside the drill rod 1, the outer ring of the grout delivery pipe 3 being installed correspondingly to the inner ring of the inner frame 7. The installation end of 3 is fixedly connected to the inner ring of the inner frame 7. The inner frame 7 can stably position the grouting pipe 3, so that the grouting pipe 3 and the drill rod 1 are more stable when they are assembled. The top end of the grouting pipe 3 is provided with a diversion pipe 4. The installation end of the diversion pipe 4 is installed corresponding to the top end of the grouting pipe 3. The installation end of the diversion pipe 4 is fixedly connected to the top end of the grouting pipe 3. The diversion pipe 4 can evenly distribute the cement grout flowing in the grouting pipe 3, so as to better carry out the construction operation of high-pressure jet grouting pile.

[0023] Each end of the diversion pipe 4 away from the grout delivery pipe 3 is equipped with a nozzle assembly 5. The nozzle assembly 5 is inclined upwards. Each nozzle assembly 5 includes a nozzle 51. The inner ring of the nozzle 51 is installed correspondingly to the outer ring of each end of the diversion pipe 4. The outer ring of the upper end of the diversion pipe 4 is fixedly connected to the inner wall of the nozzle 51. A high-pressure nozzle 52 is installed at the top of the nozzle 51. The mounting end of the high-pressure nozzle 52 is installed correspondingly to one end of the nozzle 51 and is fixedly connected to one end of the nozzle 51. The high-pressure nozzle 52 and the nozzle 51 are in a through-flow manner with the diversion pipe 4. The diversion pipe 4 diverts the cement slurry flowing in the grout delivery pipe 3 and then sprays it out under high pressure through the cooperation of the high-pressure nozzle 52 and the nozzle 51. A positioning sleeve 53 is provided on the outer ring of the nozzle 51. The outer ring of the nozzle 51 has an installation groove. The mounting end of 53 is installed corresponding to the mounting groove. The mounting end of the positioning sleeve 53 is fixedly connected to the inner wall of the mounting groove. Two sets of positioning pins 54 are provided on the outer side of the positioning sleeve 53. The mounting end of the positioning pin 54 is fixedly connected to the positioning sleeve 53. A positioning groove is provided on the inner frame 7. Positioning holes are provided on both sides of the inner wall of the positioning groove. The top of the positioning pin 54 is installed corresponding to the positioning hole. The positioning pin 54 is rotatably connected to the positioning hole. The setting of the positioning sleeve 53 can make the nozzle 51 stably assembled in the positioning groove on the inner frame 7. The setting of multiple sets of nozzle assemblies 5 can spray cement slurry into the soil layer and mix it with the soil to form a continuous overlapping cement solid, thereby improving the bearing capacity and stability of the foundation. At the same time, the upward tilting setting of the nozzle assembly 5 can avoid the spraying end of the high pressure nozzle 52 being opposite to the soil, so that the high pressure nozzle 52 can spray the cement slurry at high pressure.

[0024] A connecting assembly 6 is provided on the grout delivery pipe 3. The connecting assembly 6 includes a connecting sleeve 61. The mounting end of the connecting sleeve 61 is installed corresponding to the outer ring of the grout delivery pipe 3 and is fixedly connected to the outer ring of the grout delivery pipe 3. Multiple sets of adjusting cylinders 62 are provided on the outer ring of the connecting sleeve 61. The mounting ends of the adjusting cylinders 62 are installed corresponding to the connecting sleeve 61 and are rotatably connected to the connecting seat on the connecting sleeve 61. An inner cylinder 63 is provided inside the adjusting cylinder 62. The outer ring of the inner cylinder 63 fits against the inner wall of the adjusting cylinder 62 and is slidably connected to the adjusting cylinder 62. Multiple sets of sliders are provided on the outer ring of one end of the inner cylinder 63 and are fixedly connected to the inner cylinder 63. Multiple sets of sliding grooves are opened on the inner wall of the adjusting cylinder 62. The sliders are installed corresponding to the sliding grooves and are slidably connected to the sliding grooves. The sliders and sliding grooves can limit and guide the inner cylinder 63 when it slides inside the adjusting cylinder 62. A return spring 64 is provided between one end of the inner cylinder 63 and the adjusting cylinder 62. The two ends are respectively installed corresponding to one end of the inner cylinder 63 and the inner wall of the adjusting cylinder 62. One end of the return spring 64 is fixedly connected to one end of the inner cylinder 63, and the other end of the return spring 64 is fixedly connected to the inner cavity of the adjusting cylinder 62. A connecting push plate 65 is provided on the end of the inner cylinder 63 away from the return spring 64. The end of the inner cylinder 63 away from the adjusting cylinder 62 is installed corresponding to the connecting push plate 65. The inner cylinder 63 and the connecting push plate 65 are rotatably connected. The mounting end of the connecting push plate 65 is installed corresponding to the outer side of the nozzle 51. The mounting end of the connecting push plate 65 is fixedly connected to the outer side of the nozzle 51. Opening slots are provided on the drill rod 1 at the corresponding positioning slot positions. When the nozzle assembly 5 is in operation, it corresponds to the opening slots. The opening slots facilitate the adjustment and movement of the nozzle assembly 5. The connecting component 6 allows the nozzle assembly 5 to be angled and makes the nozzle assembly 5 more stable when it is in the assembled state, so as to better adapt to the construction operation of high-pressure jet grouting piles under different conditions.

[0025] An adjusting assembly 8 is provided on the outer ring of the drill rod 1. The adjusting assembly 8 includes a fixing ring 81, the mounting end of which is installed correspondingly to the outer ring of the drill rod 1 and is fixedly connected to the drill rod 1. Multiple sets of cylinders 82 are provided on one side below the fixing ring 81, and multiple sets of assembly slots are provided on one side below the fixing ring 81. The mounting ends of the cylinders 82 are installed correspondingly to the assembly slots and are fixedly connected to the inner wall of the assembly slots. An adjusting sleeve 83 is provided on the output end of the cylinder 82, the output end of which is installed correspondingly to the upper side of the adjusting sleeve 83 and is fixedly connected to one side of the adjusting sleeve 83. The setting of the cylinder 82 can drive the adjusting sleeve 83 to slide along the drill rod 1. The inner ring of the adjusting sleeve 83 is tightly fitted to the outer wall of the drill rod 1. The adjusting sleeve 83 is slidably connected to the drill rod 1. Multiple sets of inclined slots are provided on the adjusting sleeve 83. The adjusting sleeve 83 can be adjusted and slidably to seal the slots on the drill rod 1, allowing soil to fall into the drill rod 1 during high-pressure jet grouting construction. The inclined slots also allow the adjusting sleeve 83 to extend the nozzle assembly 5 after adjustment, thus meeting the construction requirements of the high-pressure jet grouting pile. The adjusting assembly 8 can adjust the spray angle of the nozzle assembly 5, enabling the high-pressure nozzle 52 to be flexibly adjusted according to different construction environments and project requirements. This greatly enhances the applicability of the high-pressure nozzle 52, improves construction efficiency, and also protects the nozzle assembly 5, preventing soil blockage and extending its service life.

[0026] In this embodiment, when high-pressure jet grouting pile construction is carried out, the drill rod 1 is first driven to rotate at high speed by external equipment, so that the drill bit 2 can be used to drill the soil at the pile construction point. Then, the operator turns on the cylinder 82. The operation of the cylinder 82 drives the adjusting sleeve 83 to slide downward along the drill rod 1. At this time, after the adjustment sleeve 83 moves, the oblique groove of the adjusting sleeve 83 corresponds to the opening groove on the drill rod 1. At this time, the adjusting sleeve 83 no longer blocks the nozzle assembly 5. At this time, the return spring 64 is no longer compressed, thus pushing the inner cylinder 63. The pushing of the inner cylinder 63 pushes the nozzle 51 through the connecting push plate 65, so that the outer ring of the nozzle 51 is aligned with the adjusting sleeve 83. The inner walls of the inclined grooves on the sleeve 83 fit together. When the nozzle 51 is pushed, the positioning sleeve 53 and the positioning pin 54 adjust the positioning of the nozzle 51 by rotating it through the positioning hole on the inner frame 7. When the nozzle 51 drives the high-pressure nozzle 52 to extend out of the inclined groove on the adjusting sleeve 83, the cement slurry fluid in the grouting pipe 3 is evenly distributed to the nozzle 51 through the diversion pipe 4, and then sprayed out under high pressure through the high-pressure nozzle 52. At this time, the drill rod 1 operates and drives the drill bit 2 to rotate at high speed, so that the soil can be cut and mixed efficiently, so that the cement slurry sprayed by the high-pressure nozzle 52 can be mixed with the soil to form a pile, thereby completing the construction of the high-pressure jet grouting pile.

[0027] During the construction of high-pressure jet grouting piles, the operator uses cylinder 82 to drive the adjusting sleeve 83 to retract. After being guided by the drill rod 1, the inclined groove of the adjusting sleeve 83 guides the movement of the nozzle 51, causing the adjusting sleeve 83 to squeeze the nozzle assembly 5. This seals the opening groove on the drill rod 1, thus preventing mud from entering the drill rod 1.

[0028] The above-described specific embodiments are merely preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above-described specific embodiments.

Claims

1. A jet structure for high pressure jet grouting pile construction, comprising a drill rod (1), characterized in that: A drill bit (2) is provided at one end of the drill rod (1). A grout delivery pipe (3) is provided inside the drill rod (1). A diversion pipe (4) is provided at the top end of the grout delivery pipe (3). A nozzle assembly (5) is provided at each end of the diversion pipe (4) away from the grout delivery pipe (3). Each nozzle assembly (5) includes a nozzle (51). A high-pressure nozzle (52) is provided at the top end of the nozzle (51). A positioning sleeve (53) is provided on the outer ring of the nozzle (51). A connecting assembly (6) is provided on the grout delivery pipe (3). The connecting assembly (6) includes a connecting sleeve (61). The connecting sleeve (61) has... The outer ring is provided with multiple sets of adjusting cylinders (62), and the adjusting cylinders (62) are provided with an inner cylinder (63). A return spring (64) is provided between one end of the inner cylinder (63) and the adjusting cylinder (62). A connecting push plate (65) is provided on the end of the inner cylinder (63) away from the return spring (64). An inner frame (7) is provided inside the drill rod (1). An adjusting assembly (8) is provided on the outer ring of the drill rod (1). The adjusting assembly (8) includes a fixing ring (81). Multiple sets of cylinders (82) are provided on one side below the fixing ring (81). An adjusting sleeve (83) is provided at the output end of the cylinder (82).

2. A nozzle structure for high-pressure jet grouting pile construction according to claim 1, characterized in that, The mounting end of the drill bit (2) is installed corresponding to one end of the drill rod (1), the mounting end of the inner frame (7) is installed corresponding to the inner cavity of the drill rod (1) near the drill bit (2), the outer ring of the grout delivery pipe (3) is installed corresponding to the inner ring of the inner frame (7), and the mounting end of the diversion pipe (4) is installed corresponding to the top end of the grout delivery pipe (3).

3. The nozzle structure for building high-pressure jet grouting pile according to claim 1, characterized in that, The inner ring of the nozzle (51) is installed corresponding to the outer ring of each end of the diverter pipe (4). The mounting end of the high-pressure nozzle (52) is installed corresponding to one end of the nozzle (51). The high-pressure nozzle (52) and the diverter pipe (4) are in a through-hole configuration. The outer ring of the nozzle (51) is provided with a mounting groove. The mounting end of the positioning sleeve (53) is installed corresponding to the mounting groove. Two sets of positioning pins (54) are provided on the outer side of the positioning sleeve (53). The inner frame (7) is provided with a positioning groove. Positioning holes are provided on both sides of the inner wall of the positioning groove. The top of the positioning pin (54) is installed corresponding to the positioning hole.

4. The structure of the spray head for building high-pressure rotary jet grouting pile according to claim 1, characterized in that, The mounting end of the connecting sleeve (61) is installed corresponding to the outer ring of the slurry pipe (3), the mounting end of the adjusting cylinder (62) is installed corresponding to the connecting sleeve (61), the outer ring of the inner cylinder (63) is in close contact with the inner wall of the adjusting cylinder (62), one end of the outer ring of the inner cylinder (63) is provided with multiple sets of sliders, the inner wall of the adjusting cylinder (62) is provided with multiple sets of sliding grooves, and the sliders are installed corresponding to the sliding grooves.

5. The structure of the spray head for building high-pressure rotary jet piles according to claim 1, wherein The two ends of the reset spring (64) are respectively installed with one end of the inner cylinder (63) and the inner wall of the adjusting cylinder (62). The end of the inner cylinder (63) away from the adjusting cylinder (62) is installed with the connecting push plate (65). The mounting end of the connecting push plate (65) is installed with the outer side of the nozzle (51).

6. A nozzle structure for building high-pressure jet grouting piles according to claim 3, characterized in that, The drill pipe (1) is provided with an opening groove at a position corresponding to the positioning groove, and the spray head assembly (5) corresponds to the opening groove in the working state.

7. The structure of the spray head for building high-pressure rotary jet grouting pile according to claim 1, characterized in that, The mounting end of the fixing ring (81) is mounted in correspondence with the outer ring of the drill pipe (1), a plurality of assembly grooves are formed on the lower side of the fixing ring (81), the mounting end of the air cylinder (82) is mounted in correspondence with the assembly grooves, the inner ring of the adjusting sleeve (83) is tightly combined with the outer wall of the drill pipe (1), a plurality of beveled grooves are formed on the adjusting sleeve (83), and the output end of the air cylinder (82) is mounted in correspondence with the upper side of the adjusting sleeve (83).

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