Grouting pipe positioning device for high-pressure jet grouting pile
By using a combination of base and limit seat in the construction of high-pressure jet grouting piles, the problem of axial instability of the grouting pipe was solved, the movement trajectory of the grouting pipe was stabilized, and the foundation reinforcement effect was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA WATER ENVIRONMENT GOVERANCE
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-24
AI Technical Summary
In high-pressure jet grouting pile construction, the axial direction of the grouting pipe and the orientation of the drilling rig are unstable, causing the grouting pipe to deviate from its movement trajectory and affecting the foundation reinforcement effect.
The system adopts a combination structure of base, limit seat and synchronous drive component. It is set coaxially with the drill hole through positioning hole. The arc surface of the limit seat fits with the outer peripheral surface of the grouting pipe. The synchronous drive component drives the limit seat to abut against the outer peripheral surface of the grouting pipe to ensure the stability of the grouting pipe's movement trajectory.
Locking the movement trajectory of the grouting pipe improves the foundation reinforcement effect and ensures construction quality.
Smart Images
Figure CN224161058U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of foundation reinforcement technology, specifically relating to a grouting pipe positioning device for high-pressure jet grouting piles. Background Technology
[0002] High-pressure jet grouting is a foundation reinforcement technology that utilizes a high-pressure rotating jet stream to impact and damage the soil. During construction, workers use a drilling rig to drill a grouting pipe (also known as a "jet grouting pipe") with a nozzle to a predetermined depth in the soil layer. Then, high-pressure equipment is used to spray grout or water in the form of a high-pressure jet to impact the soil, ultimately forming a pile with a certain strength and diameter.
[0003] The inventors discovered that during the downward movement of the grouting pipe, the axial direction of the grouting pipe is consistent with the orientation of the drilling rig. However, the vibration generated during the operation of the drilling rig affects the stability of its orientation, causing the movement trajectory of the grouting pipe to deviate and affecting the reinforcement effect of the foundation. Utility Model Content
[0004] This application provides a positioning device for grouting pipes used in high-pressure jet grouting piles, which aims to lock the movement trajectory of the grouting pipes and ensure the reinforcement effect of the foundation.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] A positioning device for grouting pipes in high-pressure jet grouting piles is provided, comprising:
[0007] A base for fixing above the machining surface; the base has a positioning hole that runs through the vertical direction, and the positioning hole is coaxial with the drill hole.
[0008] Multiple limiting seats are circumferentially spaced on the base along the positioning hole, each limiting seat being slidably connected to the base to be adapted to move toward or away from the central axis of the positioning hole; and the side of the limiting seat facing the central axis of the positioning hole has an arc surface adapted to fit against the outer peripheral surface of the grouting pipe; and
[0009] A synchronous drive component is drivenly connected to each of the limiting seats to drive each of the limiting seats to move to abut the outer circumferential surface of the grouting pipe.
[0010] In one possible implementation, there are two limiting seats, and the two limiting seats are arranged symmetrically about the central axis of the positioning hole; the synchronous drive component includes:
[0011] A rotating arm, disposed between the two limiting seats, has its axis parallel to the horizontal plane, and its center is rotatably connected to the base in the vertical direction; furthermore, the rotating arm is driven by a first rotary motor for rotating it; and
[0012] Two transmission arms are respectively hinged to the two ends of the rotating arm in the vertical direction, and the swing ends of the two transmission arms are respectively hinged to the two limiting seats in the vertical direction.
[0013] In one possible implementation, the outer surface of each of the limiting seats has a flat extension extending in a horizontal direction, the extended end of which is hinged to the transmission arm.
[0014] The base has a guide rail extending along the sliding direction of the limiting seat; the guide rail is located between the limiting seat and the transmission arm, and the guide rail is slidably connected to the flat extension.
[0015] In one possible implementation, the limiting seat includes:
[0016] A sliding seat, slidably mounted on the base, and drively connected to the synchronous drive component; and
[0017] A docking block is disposed on the side of the sliding seat facing the central axis of the positioning hole and is detachably connected to the sliding seat; and the side of the docking block facing the central axis of the positioning hole has an arc surface suitable for fitting with the outer peripheral surface of the grouting pipe.
[0018] In one possible implementation, the sliding seat has a slot on the side facing the mating block, and the slot extends upward to penetrate the upper side of the sliding seat; the mating block has a protrusion adapted to be inserted into the slot from top to bottom to restrict the movement of the mating block away from the sliding seat.
[0019] In one possible implementation, the protrusion has a through hole extending vertically, and the inner bottom surface of the slot is fixedly provided with an anti-loosening nut adapted to coaxially communicate with the through hole; the protrusion further includes:
[0020] A limiting bolt is adapted to be inserted into the through hole from top to bottom and threadedly connected to the anti-loosening nut;
[0021] Specifically, when the protrusion abuts against the inner bottom surface of the slot and the limiting bolt is threadedly connected to the anti-loosening nut, the head of the limiting bolt is adapted to abut against the upper end surface of the protrusion to restrict the protrusion from moving upward relative to the sliding seat.
[0022] In one possible implementation, the grouting pipe positioning device further includes:
[0023] Two coaxially arranged mounting sleeves are both used to fit around the outer circumference of the grouting pipe and are connected to the grouting pipe; and
[0024] A lifting plate is disposed on the upper side of the base and is driven by a lifting drive component for moving it in the vertical direction; the lifting plate has a mounting hole that runs through in the vertical direction for the grouting pipe to pass through, so that the upper and lower sides of the lifting plate respectively abut against the two mounting sleeves.
[0025] In one possible implementation, the lifting drive component includes:
[0026] The transmission nut is fixedly connected to the lifting plate, and its axis is parallel to the vertical direction;
[0027] A transmission screw is threadedly connected to the transmission nut and rotatably connected to the base; a driven helical gear coaxially arranged on the transmission screw is fixedly connected to it; and
[0028] The second rotating motor is fixedly mounted on the upper side of the base, and its power output axis is parallel to the horizontal plane. The power output end of the second rotating motor has a driving helical gear that meshes with the driven helical gear.
[0029] In one possible implementation, the lower side of the base has multiple legs;
[0030] Each of the legs has a receiving groove on its lower end face and a strip-shaped hole on its outer side that communicates with the receiving groove and extends in the vertical direction; a rod is slidably inserted into each receiving groove, and the rod has a protrusion that passes through the strip-shaped hole and extends out.
[0031] When the outrigger is supported on the machining surface, the insertion rod can be moved to be inserted into the machining surface.
[0032] In one possible implementation, the lower end of each of the legs is fitted with a pad;
[0033] When the pad is connected to the lower end of the leg, the pad can close the receiving groove to restrict the extension of the insertion rod.
[0034] In this embodiment, the positioning and installation of the device can be completed by fixing the base above the machining surface and setting the positioning hole and the drill hole coaxially. Based on this, by inserting the grouting pipe into the positioning hole, the grouting pipe can move vertically into the drill hole. Furthermore, by driving each limiting seat to move simultaneously toward the central axis of the reserved hole through the synchronous drive component, the limiting seat can abut against the outer circumferential surface of the grouting pipe, so that multiple limiting seats are combined to form a structure that restricts the translation of the grouting pipe. The arc surface of the limiting seat increases the contact area with the outer circumferential surface of the grouting pipe, thereby ensuring the structural stability of the entire device.
[0035] The grouting pipe positioning device for high-pressure jet grouting piles provided in this embodiment, compared with the prior art, can lock the movement trajectory of the grouting pipe and ensure the reinforcement effect of the foundation. Attached Figure Description
[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0037] Figure 1 One of the three-dimensional structural schematic diagrams of the positioning device for the grouting pipe of the high-pressure jet grouting pile provided in the embodiments of this application;
[0038] Figure 2 This is an exploded view of the limiting seat used in the embodiments of this application;
[0039] Figure 3 This is a three-dimensional structural diagram of the sliding seat used in the embodiments of this application;
[0040] Figure 4 This is a three-dimensional structural diagram of the docking block used in the embodiments of this application;
[0041] Figure 5 This is one of the three-dimensional structural diagrams of the limiting seat and synchronous drive component used in the embodiments of this application in a combined state;
[0042] Figure 6 This is a second three-dimensional structural diagram of the limiting seat and synchronous drive component used in the embodiments of this application in a combined state;
[0043] Figure 7 A second three-dimensional structural schematic diagram of the positioning device for the grouting pipe of the high-pressure jet grouting pile provided in the embodiments of this application;
[0044] Figure 8 This is an exploded structural diagram of the lifting drive component used in the embodiments of this application;
[0045] Figure 9 This is a three-dimensional structural diagram of the outriggers, inserts, and bushings used in the embodiments of this application from an explosion perspective.
[0046] Explanation of reference numerals in the attached drawings: 1. Base; 11. Positioning hole; 12. Guide rail; 2. Limiting seat; 21. Sliding seat; 211. Flat extension; 212. Slot; 2121. Anti-loosening nut; 22. Connecting block; 221. Protrusion; 2211. Through hole; 2212. Limiting bolt; 3. Synchronous drive component; 31. Rotating arm; 311. First rotating motor; 32. Transmission arm; 4. Mounting sleeve; 5. Lifting plate; 51. Mounting hole; 6. Lifting drive component; 61. Transmission nut; 62. Transmission screw; 621. Driven helical gear; 63. Second rotating motor; 631. Driving helical gear; 7. Support leg; 71. Receiving groove; 72. Strip hole; 73. Gasket; 8. Insert rod; 81. Protrusion. Detailed Implementation
[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0048] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0051] Please refer to the following: Figures 1 to 9The positioning device for grouting pipes in high-pressure jet grouting piles provided in this application will now be described. The positioning device for grouting pipes in high-pressure jet grouting piles proposed in this application includes a base 1, multiple limiting seats 2, and a synchronous drive component 3.
[0052] The base 1 is used to fix above the machining surface and is positioned to block the drilling on the machining surface. In this embodiment, the base 1 has a positioning hole 11 that runs through the vertical direction, and when the base 1 is fixed to the machining surface, this positioning hole 11 is used to be coaxial with the drilling hole.
[0053] Multiple limiting seats 2 are arranged circumferentially on the base 1 along the positioning hole 11, specifically on the upper side of the base 1; based on this, each limiting seat 2 is slidably connected to the upper side of the base 1 to be suitable for moving toward or away from the central axis of the positioning hole 11; and the side of the limiting seat 2 facing the central axis of the positioning hole 11 adopts an arc surface suitable for fitting with the outer peripheral surface of the grouting pipe.
[0054] The synchronous drive component 3 is connected to each limit seat 2 in a transmission manner, so as to drive each limit seat 2 to move to abut the outer circumferential surface of the grouting pipe.
[0055] In this embodiment, the positioning and installation of the device can be completed by fixing the base 1 above the machining surface and setting the positioning hole 11 and the drill hole coaxially. Based on this, by inserting the grouting pipe into the positioning hole 11, the grouting pipe can be moved vertically into the drill hole. Furthermore, by driving each limiting seat 2 to move simultaneously toward the central axis of the reserved hole through the synchronous drive component 3, the limiting seat 2 can abut against the outer peripheral surface of the grouting pipe, so that multiple limiting seats 2 can be combined to form a structure that restricts the translation of the grouting pipe. The arc surface of the limiting seat 2 increases the contact area with the outer peripheral surface of the grouting pipe, thereby ensuring the structural stability of the entire device.
[0056] The grouting pipe positioning device for high-pressure jet grouting piles provided in this embodiment, compared with the prior art, can lock the movement trajectory of the grouting pipe and ensure the reinforcement effect of the foundation.
[0057] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, there are two limit seats 2, and the two limit seats 2 are arranged symmetrically about the central axis of the positioning hole 11; based on this, the synchronous drive component 3 includes a rotating arm 31 and two transmission arms 32.
[0058] The rotating arm 31 is disposed between the two limiting seats 2, its axis is parallel to the horizontal plane, and the center of the rotating arm 31 is rotatably connected to the base 1 in the vertical direction; and, in order to realize the rotation of the rotating arm 31, the rotating arm 31 is connected to a first rotating motor 311 for driving its rotation.
[0059] Two transmission arms 32 are respectively hinged to the two ends of the rotating arm 31 in the vertical direction, and the swing ends of the two transmission arms 32 are respectively hinged to the two limit seats 2 in the vertical direction.
[0060] By adopting the above technical solution, when the first rotating motor 311 drives the rotating arm 31 to rotate, both transmission arms 32 on both sides swing to pull or push the limiting seat 2 outward, so that the two limiting seats 2 move towards each other or away from each other.
[0061] It should be further explained that, in order to achieve structural balance, the synchronous drive component 3 used in this embodiment of the application has two components, and the two synchronous drive components 3 are respectively located on both sides of the limiting seat 2; based on this, in order to reduce cost investment, the rotating arm 31 on one side is rotatably connected to the base 1 and is not connected to the first rotating motor 311.
[0062] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 As shown, each limiting seat 2 has a flat extension 211 extending horizontally on its outer side. The extension end of the flat extension 211 is hinged to the transmission arm 32 to prevent the side of the limiting seat 2 from affecting the swing of the rotating arm 31 and the transmission arm 32.
[0063] Based on the foregoing, the base 1 also has a guide rail 12 extending along the sliding direction of the limiting seat 2; the guide rail 12 is located between the limiting seat 2 and the transmission arm 32, and is also located on the lower side of the flat extension 211, and the guide rail 12 is slidably connected to the flat extension 211 to guide the limiting seat 2.
[0064] In some embodiments, such as Figures 2 to 6 As shown, the limiting seat 2 includes a sliding seat 21 and a docking seat.
[0065] The sliding seat 21 is slidably disposed on the base 1 and is connected to the aforementioned synchronous drive member 3 in a transmission manner, that is, the aforementioned flat extension 211 is fixedly disposed on the side of the sliding seat 21.
[0066] The docking block 22 is located on the side of the sliding seat 21 facing the central axis of the positioning hole 11 and is detachably connected to the sliding seat 21; and the side of the docking block 22 facing the central axis of the positioning hole 11 adopts an arc surface suitable for fitting with the outer peripheral surface of the grouting pipe.
[0067] In practical use, by replacing different connecting blocks 22, this device can be adapted to grouting pipes of different specifications.
[0068] In some embodiments, such as Figures 2 to 4As shown, the sliding seat 21 has a slot 212 on the side facing the docking block 22, and the slot 212 extends upward to penetrate the upper side of the sliding seat 21; the docking block 22 has a protrusion 221 adapted to be inserted into the slot 212 from top to bottom to restrict the movement of the docking block 22 away from the sliding seat 21.
[0069] In some embodiments, such as Figures 2 to 4 As shown, the protrusion 221 has a through hole 2211 extending in the vertical direction, and the inner bottom surface of the slot 212 is fixedly provided with an anti-loosening nut 2121 suitable for coaxial communication with the through hole 2211; based on this, the protrusion 221 also includes a limiting bolt 2212, which is suitable for being inserted into the through hole 2211 from top to bottom and threadedly connected to the anti-loosening nut 2121.
[0070] By adopting the above technical solution, when the protrusion 221 abuts against the inner bottom surface of the slot 212 and the limiting bolt 2212 is threadedly connected to the anti-loosening nut 2121, the head of the limiting bolt 2212 is adapted to abut against the upper end surface of the protrusion 221 to restrict the protrusion 221 from moving upward relative to the sliding seat 21.
[0071] In some embodiments, such as Figure 1 and Figure 8 As shown, the grouting pipe positioning device also includes two mounting sleeves 4 and a lifting plate 5.
[0072] Two mounting sleeves 4 are used to coaxially fit around the outer periphery of the grouting pipe and are fixedly connected to the grouting pipe.
[0073] The lifting plate 5 is set on the upper side of the base 1 and is connected to a lifting drive component 6 for driving it to move in the up and down direction; the lifting plate 5 has a mounting hole 51 that runs through in the up and down direction for the grouting pipe to pass through, so that the upper and lower sides of the lifting plate 5 respectively abut against two mounting sleeves 4.
[0074] During actual installation, first fix the lower mounting sleeve 4 to the grouting pipe, then move the grouting pipe from bottom to top until it passes through the mounting hole 51, so that the mounting sleeve 4 abuts against the lower side of the lifting plate 5; finally, connect the upper mounting sleeve 4 to the grouting pipe, so that the mounting sleeve 4 abuts against the upper side of the lifting plate 5, and clamp the two mounting sleeves 4 together with the lifting plate 5.
[0075] It should be noted that, in order to drive the lifting plate 5, in this embodiment, a mounting platform is also fixedly provided on the upper side of the base 1, and the mounting platform and the base 1 are connected by a support shaft; based on this, the lifting plate 5 is slidably connected to this support shaft in the vertical direction.
[0076] In some embodiments, such as Figure 8 As shown, the lifting drive component 6 includes a transmission nut 61, a transmission screw 62, and a second rotating motor 63.
[0077] The transmission nut 61 is fixedly connected to the lifting plate 5, and its axis is parallel to the vertical direction.
[0078] The transmission screw 62 is threadedly connected to the transmission nut 61, and the transmission screw 62 is rotatably connected to the base 1 in the vertical direction. Specifically, the transmission screw 62 is disposed between the aforementioned mounting platform and the base 1, and its upper and lower ends are rotatably connected to the mounting platform and the base 1, respectively. Furthermore, a driven helical gear 621 is fixedly connected to the transmission screw 62 and is coaxially disposed therewith. This driven helical gear 621 is located on the upper side of the mounting platform so that the upper side of the mounting platform supports the driven helical gear 621.
[0079] The second rotary motor 63 is fixedly mounted on the upper side of the base 1, specifically on the upper side of the mounting platform. Its power output axis is parallel to the horizontal plane, and the power output end of the second rotary motor 63 has an active helical gear 631 that meshes with the driven helical gear 621 to drive the transmission screw 62, and finally complete the drive of the lifting plate 5 to move in the up and down direction.
[0080] In some embodiments, such as Figure 1 and Figure 9 As shown, the lower side of the base 1 has multiple legs 7.
[0081] Each support leg 7 has a receiving groove 71 on its lower end face and a strip hole 72 on its outer side that communicates with the receiving groove 71 and extends in the vertical direction; based on this, a plug rod 8 is slidably inserted into each receiving groove 71, and the plug rod 8 has a protrusion 81 that passes through the strip hole 72 and extends out.
[0082] By adopting the above technical solution, when the support leg 7 is supported on the machining surface, the insertion rod 8 can be moved into the machining surface by hammering the protrusion 81 downward from the outside, so as to ensure the structural stability of the base 1.
[0083] In some embodiments, such as Figure 1 and Figure 9 As shown, each support leg 7 has a pad 73 fitted at its lower end.
[0084] By adopting the above technical solution, when the pad 73 is connected to the lower end of the support leg 7, the pad 73 can close the receiving groove 71 to restrict the extension of the insertion rod 8.
[0085] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A grouting pipe positioning device for high-pressure jet grouting piles, characterized in that, include: A base for fixing above the machining surface; the base has a positioning hole that runs through the vertical direction, and the positioning hole is coaxial with the drill hole. Multiple limiting seats are circumferentially spaced on the base along the positioning hole, and each limiting seat is slidably connected to the base to be adapted to move toward or away from the central axis of the positioning hole; and the side of the limiting seat facing the central axis of the positioning hole adopts an arc surface adapted to fit with the outer peripheral surface of the grouting pipe. as well as A synchronous drive component is drivenly connected to each of the limiting seats to drive each of the limiting seats to move to abut the outer circumferential surface of the grouting pipe.
2. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 1, characterized in that, The limiting seat has two parts, and the two limiting seats are arranged symmetrically about the central axis of the positioning hole; the synchronous drive component includes: A rotating arm, disposed between the two limiting seats, has its axis parallel to the horizontal plane, and its center is rotatably connected to the base in the vertical direction; furthermore, the rotating arm is driven by a first rotary motor for rotating it; and Two transmission arms are respectively hinged to the two ends of the rotating arm in the vertical direction, and the swing ends of the two transmission arms are respectively hinged to the two limiting seats in the vertical direction.
3. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 2, characterized in that, Each of the limiting seats has a flat extension extending in the horizontal direction on its outer side, and the extended end of the flat extension is hinged to the transmission arm. The base has a guide rail extending along the sliding direction of the limiting seat; the guide rail is located between the limiting seat and the transmission arm, and the guide rail is slidably connected to the flat extension.
4. The grouting pipe positioning device for high-pressure jet grouting piles as described in any one of claims 1-3, characterized in that, The limiting seat includes: A sliding seat, slidably mounted on the base, and drively connected to the synchronous drive component; and A docking block is disposed on the side of the sliding seat facing the central axis of the positioning hole and is detachably connected to the sliding seat; and the side of the docking block facing the central axis of the positioning hole has an arc surface suitable for fitting with the outer peripheral surface of the grouting pipe.
5. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 4, characterized in that, The sliding seat has a slot on the side facing the docking block, and the slot extends upward to penetrate the upper side of the sliding seat; the docking block has a protrusion adapted to be inserted into the slot from top to bottom to restrict the docking block from moving away from the sliding seat.
6. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 5, characterized in that, The protrusion has a through hole extending vertically, and the inner bottom surface of the slot is fixedly provided with an anti-loosening nut suitable for coaxial communication with the through hole; the protrusion also includes: A limiting bolt is adapted to be inserted into the through hole from top to bottom and threadedly connected to the anti-loosening nut; Specifically, when the protrusion abuts against the inner bottom surface of the slot and the limiting bolt is threadedly connected to the anti-loosening nut, the head of the limiting bolt is adapted to abut against the upper end surface of the protrusion to restrict the protrusion from moving upward relative to the sliding seat.
7. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 1, characterized in that, The grouting pipe positioning device also includes: Two coaxially arranged mounting sleeves are both used to fit around the outer circumference of the grouting pipe and are connected to the grouting pipe; and A lifting plate is disposed on the upper side of the base and is driven by a lifting drive component for moving it in the vertical direction; the lifting plate has a mounting hole that runs through in the vertical direction for the grouting pipe to pass through, so that the upper and lower sides of the lifting plate respectively abut against the two mounting sleeves.
8. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 7, characterized in that, The lifting drive component includes: The transmission nut is fixedly connected to the lifting plate, and its axis is parallel to the vertical direction; A transmission screw is threadedly connected to the transmission nut and rotatably connected to the base; a driven helical gear coaxially arranged on the transmission screw is fixedly connected to it; and The second rotating motor is fixedly mounted on the upper side of the base, and its power output axis is parallel to the horizontal plane. The power output end of the second rotating motor has a driving helical gear that meshes with the driven helical gear.
9. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 1, characterized in that, The lower side of the base has multiple support legs; Each of the legs has a receiving groove on its lower end face and a strip-shaped hole on its outer side that communicates with the receiving groove and extends in the vertical direction; a rod is slidably inserted into each receiving groove, and the rod has a protrusion that passes through the strip-shaped hole and extends out. When the outrigger is supported on the machining surface, the insertion rod can be moved to be inserted into the machining surface.
10. The grouting pipe positioning device for high-pressure jet grouting piles as described in claim 9, characterized in that, Each of the legs is fitted with a pad at its lower end; When the pad is connected to the lower end of the leg, the pad can close the receiving groove to restrict the extension of the insertion rod.