Bituminous concrete core wall core sample drilling and backfilling device

Abstract

The utility model relates to the technical field of drilling and backfilling, and particularly discloses an asphalt concrete core wall core sample drilling and backfilling device which comprises a grouting pipe, a grouting pipe, a pressure sensor, a pressure sensor and a pressure sensor. The grouting head is in threaded connection with the threads on one side of the grouting pipe; the positioning disc is movably arranged on the outer side of the outer wall of the grouting pipe in a sleeving mode, and a limiting ring is further fixedly installed on the outer side of the outer wall of the positioning disc; the positioning mechanism is arranged on the inner side of the positioning disc; according to the device, the grouting pipe, the grouting head and the positioning disc work cooperatively, when grout is injected, the grouting head is driven by pressure to retreat outwards from the bottom of a drill hole, and filling and layered compaction are completed synchronously; the multiple sections of grouting pipes connected in a threaded mode are matched with different drilling depths, rigid fixing is enhanced through the self-locking function of an arc-shaped pushing groove and an ejector pin protrusion in the positioning mechanism, and displacement is avoided in the backfilling process.

Description

Technical Field

[0001] This utility model relates to the field of drilling and backfilling technology, specifically to a drilling and backfilling device for asphalt concrete core wall samples. Background Technology

[0002] Existing asphalt concrete core wall drilling and backfilling devices (such as CN220978142U) typically employ a U-shaped support frame, a screw-driven protective cover, and a mechanical compaction mechanism. Its core structure includes a U-shaped support mechanism fixed to the drilled hole in the wall, a screw driving the cover to connect with the drilled hole via a threaded connection, and a telescopic rod driving a pressure plate to slide within the cover to compact the filler material. Simultaneously, an adjusting rod and a cam structure adapt to the compaction requirements of small-diameter holes. This type of device replenishes filler material through grouting holes on the side wall of the cover and relies on manual operation of a turntable, handle, and knobs to adjust the compaction area. It is primarily used for backfilling and repair scenarios after drilling and testing of asphalt concrete core walls.

[0003] The above-mentioned device has the following limitations in practical applications: the compaction process relies on repeated manual operation of the telescopic rod and adjusting rod, which is inefficient and labor-intensive; the compaction mechanism needs to extend / retract the cam to adapt to the hole diameter, and the adjustment accuracy is affected by the thread fit clearance, which can easily lead to uneven compaction in small hole diameter areas; the threaded sealing structure between the cover and the grouting hole is prone to loosening due to vibration during high-pressure grouting, which poses a risk of grout overflow; the mechanical linkage of multiple components such as the U-shaped support frame, screw, and telescopic rod results in structural redundancy, high installation and maintenance costs, and the threaded parts are prone to wear and failure during long-term use. Utility Model Content

[0004] The purpose of this invention is to provide a device for drilling and backfilling core samples of asphalt concrete core walls to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a core sample drilling and backfilling device for asphalt concrete core walls, comprising:

[0006] Grouting pipe, and matching threads are provided on both sides of the grouting pipe;

[0007] A grouting head, which is screwed onto the thread on one side of the grouting pipe;

[0008] A positioning plate is movably fitted onto the outer side of the grouting pipe, and a limit ring is also fixedly installed on the outer side of the positioning plate.

[0009] A positioning mechanism, wherein the positioning mechanism is disposed on the inner side of the positioning disk;

[0010] A corrugated pipe, one end of which is screwed to the thread at the other end of the grouting pipe, and the other end is connected to the grouting equipment.

[0011] In one feasible implementation, the grouting head is configured as a disc shape and has a plurality of grouting holes.

[0012] In one feasible implementation, the diameter of the limiting ring is larger than the diameter of the positioning disk.

[0013] In one feasible implementation, a receiving groove is provided on one side of the positioning disk.

[0014] In one feasible implementation, the positioning mechanism includes: a rotating member, the outer side of which is screwed into the receiving groove of the positioning disk and has a through hole in the middle, and is concentrically arranged with the positioning disk; a plurality of ejector pins arranged in a circumferential array and mounted on the inner side of the positioning disk that can move radially, with the tail ends of the plurality of ejector pins extending into the receiving groove; and a linkage assembly mounted on the inner side of the plurality of ejector pins and the rotating member.

[0015] In one feasible implementation, the linkage component includes: a protrusion, a plurality of the protrusions being respectively disposed at the ends of a plurality of the ejector pins; and a push groove, a plurality of the push grooves being arc-shaped and respectively arrayed on one side of the rotating component.

[0016] In one possible implementation, a plurality of the push grooves are matched with a plurality of the protrusions.

[0017] In one possible implementation, an annular protrusion is installed on the inner side of the receiving groove.

[0018] In one feasible implementation, the outer wall of the rotating component is threaded.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This device adopts the coordinated work of grouting pipe, grouting head and positioning plate. When the grout is injected, the grouting head is driven by pressure to move outward from the bottom of the drill hole, and the filling and layered compaction are completed simultaneously. The multi-segment grouting pipe with threaded connection is adapted to different drilling depths. The self-locking function of the arc-shaped push groove and the protruding pin in the positioning mechanism enhances the rigid fixation and avoids displacement during the backfilling process. Compared with the prior art, this solution replaces the complex mechanical compaction components with pressure drive, which greatly improves the simplification of the structure. At the same time, the density is dynamically optimized by converting the kinetic energy of the grout. It is especially suitable for the high-standard backfilling requirements of high efficiency and low intervention in small-diameter scenarios. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the protruding structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the push groove structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the front sectional view of the present invention.

[0025] In the diagram: 1. Grouting pipe, 2. Grouting head, 3. Positioning plate, 4. Limiting ring, 5. Corrugated pipe, 6. Grouting hole, 7. Receiving groove, 8. Rotating part, 9. Ejector pin, 10. Protrusion, 11. Pushing groove, 12. Receiving groove, 13. Annular protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 5 This utility model provides a technical solution: a core sample drilling and backfilling device for asphalt concrete core walls, comprising: a grouting pipe 1, a grouting head 2, a positioning plate 3, a positioning mechanism, and a corrugated pipe 5. The grouting pipe 1 is provided with matching threads on both sides; the grouting head 2 is screwed onto the thread on one side of the grouting pipe 1; the positioning plate 3 is movably fitted onto the outer side of the outer wall of the grouting pipe 1, and a limit ring 4 is fixedly installed on the outer side of the outer wall of the positioning plate 3; the positioning mechanism is located on the inner side of the positioning plate 3; one end of the corrugated pipe 5 is screwed onto the thread at the other end of the grouting pipe 1, and the other end is connected to the grouting equipment.

[0028] It should be noted that, firstly, before backfilling the drilled hole, a grouting head 2 and a positioning plate 3, which are compatible with the drilled hole size, are used. The grouting head 2 is screwed to the threaded end of the grouting pipe 1, and the corrugated pipe 5 is screwed to the other end of the grouting pipe 1 and connected to the grouting equipment. When connecting the grouting pipe 1, the grouting head 2, and the corrugated pipe 5, the corresponding number of grouting pipes 1 can be selected according to the drilling depth for end-to-end threaded connection to extend the pipeline (the grouting pipe 1, the grouting head 2, and the corrugated pipe 5 are detachable. Furthermore, even if the drilled hole opening is blocked by the limiting ring 4 and the positioning plate 3, the workers can still disconnect the connection between the grouting pipe 1 and the corrugated pipe 5 and increase the number of grouting pipes 1. After completing the connection of multiple grouting pipes 1, the corrugated pipe 5 is reconnected). Then, the positioning plate 3 and the grouting pipe 1 are moved to the drilled hole so that the grouting head 2 and the grouting pipe 1 are inserted into the drilled hole. The limiting ring 4 is tightly attached to the wall surface to achieve initial positioning. The operator rotates the positioning mechanism to firmly fix the positioning plate 3 at the borehole opening. In actual use, this continues until the grouting head 2 reaches the deepest part of the borehole. After starting the grouting equipment, the concrete grout flows sequentially through the corrugated pipe 5, the grouting pipe 1, and the grouting head 2 into the bottom of the borehole. As the grout is continuously injected, the internal pressure gradually increases, pushing the grouting head 2 to slowly move outward from the bottom of the hole. During this process, the grout evenly fills the borehole space through the fitting gap between the grouting head 2 and the hole wall. At the same time, the grouting pipe 1 maintains axial stability under the fixing action of the positioning plate 3, ultimately achieving layered compaction and filling from the inside out, ensuring that the backfill density meets the requirements. The receiving groove 12 set in the positioning plate 3 is used to match the grouting head 2, maximizing the filling of the borehole during the backfilling process.

[0029] As a preferred embodiment, the grouting head 2 is further configured as a disc shape and has several grouting holes 6. When the disc-shaped grouting head 2 injects grout through the multiple grouting holes 6 evenly distributed on its surface, the grout is discharged radially from the grouting holes 6, and the diffusion and homogenization of the grout on the borehole cross section is achieved through the hole group layout.

[0030] As a preferred option, the diameter of the limiting ring 4 is larger than the diameter of the positioning disk 3. During the grouting process, when the positioning disk 3 enters the borehole, the outward expansion structure of the limiting ring 4 forms a covering and limiting structure on the edge of the borehole, preventing grout from overflowing along the borehole opening and ensuring that the grouting head 2 maintains radial constraint stability during the axial retraction process driven by pressure.

[0031] As a preferred embodiment, the positioning disk 3 is further provided with a receiving groove 7 on one side. The positioning mechanism includes a rotating component 8, ejector pins 9, and a linkage assembly. The outer side of the rotating component 8 is screwed into the receiving groove 7 of the positioning disk 3, and a through hole is provided in the middle, and it is concentrically arranged with the positioning disk 3. A plurality of ejector pins 9 are arranged in a circumferential array and are installed on the inner side of the positioning disk 3, and the tail ends of the plurality of ejector pins extend into the receiving groove 7. The linkage assembly is installed on the inner side of the plurality of ejector pins 9 and the rotating component 8. The outer wall of the rotating component 8 is threaded.

[0032] It should be noted that the rotating part 8 is fixedly connected by two concentric rings of different diameters. The outer wall of the smaller diameter ring has anti-slip textures to facilitate operation, while the outer wall of the larger diameter ring has threads. When the operator rotates the rotating part 8, the engagement structure between the threads on its outer wall and the receiving groove 7 of the positioning disk 3 causes the rotating part 8 to move. At this time, the linkage component converts the rotational motion of the rotating part 8 into the radial movement of the ejector pins 9. The rotating part 8 is concentrically positioned with the grouting pipe 1 through the through hole. The linkage component converts the axial displacement of the rotating part 8 into the synchronous outward expansion of the ejector pins 9 along the radial direction of the positioning disk 3. As the rotating part 8 continues to rotate, the ends of multiple ejector pins 9 synchronously press against the inner wall of the borehole, forming a circumferentially distributed mechanical lock. During this process, the through hole ensures that the axis of the grouting pipe 1 always coincides with the axis of the borehole. At the same time, the reaction force generated when each ejector pin 9 is pressed is offset by the self-locking effect of the threads of the rotating part 8, ultimately achieving rapid and rigid fixation of the positioning disk 3 in the borehole. Since the outer side of the rotating part 8 is screwed into the receiving groove 7 of the positioning disk 3, and the rotating part 8 and the positioning disk 3 are connected by screwing, the reaction force generated when each ejector pin 9 is pressed is offset by the self-locking effect of the thread of the rotating part 8.

[0033] As a preferred embodiment, the linkage component further includes: protrusions 10 and push grooves 11, with several protrusions 10 respectively disposed at the ends of several ejector pins 9; several push grooves 11 are arc-shaped and are respectively arrayed on one side of the rotating member 8; wherein, several push grooves 11 and several protrusions 10 are matched with each other.

[0034] It should be noted that when the operator rotates the rotating component 8, the arc-shaped push grooves 11 distributed in its array move relative to the protrusions 10 at the ends of the ejector pins 9. Every time the rotating component 8 rotates by a certain angle, the arc-shaped contour of the push groove 11 slides along the surface of the protrusion 10. The circumferential rotation of the rotating component 8 is converted into a linear displacement of the ejector pins 9 along the radial direction of the positioning disk 3 through the tangential contact force between the groove wall and the protrusion 10. During this process, the protrusions 10 of multiple ejector pins 9 expand outward at equal intervals due to the synchronous arc-shaped guiding effect of the push grooves 11. As the rotating component 8 continues to rotate, the ends of all ejector pins 9 synchronously press against the inner wall of the borehole, forming a uniformly distributed multi-point contact lock. At the same time, the continuous contact surface of the arc-shaped push groove 11 increases the force transmission area, making the pressing force of the ejector pins 9 on the inner wall of the borehole more evenly distributed. Finally, through mechanical linkage, the positioning disk 3 and the inner wall of the borehole are quickly and precisely rigidly anchored.

[0035] As a preferred option, an annular protrusion 13 is installed on the inner side of the receiving groove 7. When the rotating part 8 rotates and pushes the ejector pin 9 to move outward to the maximum stroke, the annular protrusion 13 forms a rigid contact limit with the inner end face of the rotating part 8, which limits the axial displacement stroke of the rotating part 8. This can eliminate the risk of thread overload caused by misoperation, prevent the ejector pin 9 from deforming, and improve the service life and operational safety of the ejector pin 9.

[0036] In the description of this utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," and "both ends," 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 utility model 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. At the same time, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction relationship between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bitumen concrete core wall core sample bore backfilling device, characterised in that, Include: Grouting pipe (1), both sides of the grouting pipe (1) are provided with matching threads; Grouting head (2), the grouting head (2) is screwed on the thread on one side of the grouting pipe (1); Positioning disc (3), the positioning disc (3) is movably sleeved outside the outer wall of the grouting pipe (1), and the outer wall of the positioning disc (3) is further fixedly provided with a limiting ring (4); Positioning mechanism, the positioning mechanism is arranged on the inner side of the positioning disc (3); Bellows (5), one end of the bellows (5) is screwed on the thread at the other end of the grouting pipe (1), and the other end is connected with the grouting equipment.

2. The device of claim 1, wherein: The grouting head (2) is disc-shaped and is provided with a plurality of grouting holes (6).

3. The device of claim 1, wherein: The diameter of the limiting ring (4) is greater than the diameter of the positioning disc (3).

4. The device of claim 3, wherein: One side of the positioning disc (3) is provided with a containing groove (7).

5. The device of claim 4, wherein: The positioning mechanism comprises: Rotary part (8), the outer wall of the rotary part (8) is screwed in the containing groove (7) of the positioning disc (3), and a through hole is formed in the middle and is concentrically arranged with the positioning disc (3); Thimble (9), a plurality of thimbles (9) are arranged in a circumferential array and are movably installed on the inner side of the positioning disc (3), and the tail portions of the thimbles extend into the containing groove (7); Linkage assembly, the linkage assembly is installed on the inner side of the thimbles (9) and the rotary part (8).

6. The device of claim 5, wherein: The linkage assembly comprises: Protrusion (10), a plurality of protrusions (10) are respectively arranged on the end portions of the thimbles (9); Pushing groove (11), a plurality of pushing grooves (11) are arranged in an arc shape and are respectively arranged on one side of the rotary part (8).

7. A device for backfilling a core sample drill hole according to claim 6, wherein: A plurality of pushing grooves (11) and a plurality of protrusions (10) are matched with each other.

8. The device of claim 4, wherein: The inner side of the containing groove (7) is provided with an annular protrusion (13).

9. The device of claim 5, wherein: The outer wall of the rotary part (8) is provided with threads.

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