Anchor drilling device with impact function

Abstract

The utility model discloses an anchor drilling device with an impact function, comprising: a drilling rig having a rotating power head; an impactor, one end of which is fixedly connected to the rotating power head of the drilling rig; a rotary grouting adapter, the rotary grouting adapter comprising a shell and a rotating core, the rotating core being rotatably installed in the shell, the rotating core having a first end and a second end extending out of the shell, the first end being fixedly connected to the other end of the impactor, the shell having a grouting chamber inside, the rotating core having a grouting channel connected to the grouting chamber inside; a self-drilling hollow anchor fixedly installed at the second end of the rotating core, the hollow channel inside the self-drilling hollow anchor being connected to the grouting channel of the rotating core. The utility model installs the impactor at the rear, and then realizes the rotational connection between the impactor and the self-drilling hollow anchor through the rotary grouting adapter, forming an anchor drilling device capable of realizing the process of drilling and grouting at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering equipment, in particular to an anchor drilling device with an impact function. Background Art

[0002] At present, the commonly used construction scheme of down-the-hole impactor is to install a drill bit at the front end of the down-the-hole impactor, and to form a hole by impacting the front end drill bit through the impact of the down-the-hole impactor during drilling, and to extend the depth of the hole by connecting a drill rod to the rear end of the down-the-hole impactor. When the hole reaches the designed depth, the drill rod (including the down-the-hole impactor and the drill bit) is pulled out, and then a grouting pipe is inserted into the hole to fill it with cement slurry, and then anchor bodies such as steel anchor rods are inserted to complete the anchoring construction process.

[0003] For example, the existing application number is 202210155712.5, and the name is a Chinese invention patent application for a pneumatic down-the-hole hammer drilling device. The application relates to a pneumatic down-the-hole hammer drilling device, including a drill rod, an impactor and a drill bit, wherein the rear joint of the impactor is fixedly connected to the drill rod, the clamping sleeve of the impactor is connected to the drill bit, the shell of the impactor is provided with a slag collecting chamber, the opening of the slag collecting chamber is located on the outer peripheral surface of the shell, and the shell is also provided with a guide plate and a first driving mechanism, the guide plate is located directly above the opening of the slag collecting chamber, and the end of the guide plate away from the axis of the shell is tilted downward; the first driving mechanism is used to drive the guide plate to slide out of the outside of the shell or slide into the shell. In this application, an extendable guide plate is provided, and when the slag is blown upward by compressed air, the moving slag will be guided by the guide plate into the slag collecting chamber, thereby reducing the accumulation of slag between the outer surface of the shell and the borehole wall to ensure drilling efficiency. It can be seen that this patent application adopts the same technical solution as the prior art, that is, the impactor is placed in front and installed between the drill bit and the drill rod.

[0004] However, the existing down-the-hole impactor construction process has the following disadvantages: when drilling under geological conditions where the hole is prone to collapse and the broken rock and soil make it difficult to form a hole, the down-the-hole impactor is prone to getting stuck in the hole. In addition, the hole is prone to collapse after the drill rod is withdrawn after the drilling is completed, making subsequent grouting and insertion of steel anchor rods difficult. As a result, the anchor rod construction cannot be completed under geological conditions where the hole is prone to collapse and the broken rock and soil make it difficult to form a hole, which in turn affects the project quality and causes construction delays.

[0005] In view of this, this utility model patent is proposed. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides an anchor drilling device with impact function, which can be used to solve the technical problem of difficulty in inserting anchors when drilling in geological conditions where the hole is prone to collapse and the broken rock and soil are difficult to drill holes. Specifically, the following technical solutions are adopted:

[0007] An anchor drilling device with impact function, comprising:

[0008] Drilling machine, having a rotating power head;

[0009] An impactor, one end of which is fixedly connected to the rotary power head of the drilling rig;

[0010] A rotary grouting adapter, the rotary grouting adapter comprising a shell and a rotating core, the rotating core is rotatably installed in the shell, the rotating core has a first end and a second end extending out of the shell, the first end is fixedly connected to the other end of the impactor, the shell has a grouting chamber inside, and the rotating core has a grouting channel connected to the grouting chamber;

[0011] The self-drilling hollow anchor rod is fixedly mounted on the second end of the rotating core, and the hollow channel inside the self-drilling hollow anchor rod is connected with the grouting channel of the rotating core.

[0012] As an optional implementation manner of the present utility model, the first end of the rotating core is closed, and a connecting piece is fixedly connected to the first end. The first end of the rotating core is fixedly connected to the other end of the impactor through the connecting piece.

[0013] As an optional embodiment of the present utility model, the connecting member includes a spline shaft, the other end of the impactor has a spline hole, and the spline shaft is plugged into the spline hole and fixedly connected by a plug pin.

[0014] As an optional embodiment of the utility model, the second end of the rotating core has a threaded connection hole extending along the central axis, one end of the grouting channel inside the rotating core is connected to the threaded connection hole, and the other end passes through the outer peripheral wall of the rotating core and is connected to the grouting chamber of the shell; the self-drilling hollow anchor rod is threadedly fixedly connected to the threaded connection hole.

[0015] As an optional implementation manner of the present utility model, the shell is provided with a grouting joint, and the interior of the grouting joint is provided with a grouting joint channel connected with the grouting chamber.

[0016] As an optional embodiment of the present utility model, the drilling rig is a pneumatic drilling rig, which has a compressed gas supply interface. The impactor is connected to the compressed gas supply interface of the pneumatic drilling rig through a gas pipeline. The pneumatic drilling rig provides compressed gas to the impactor through the compressed gas supply interface, which is used for the impactor to achieve impact conditions.

[0017] As an optional embodiment of the present invention, the self-drilling hollow anchor rods include multiple ones, and two adjacent self-drilling hollow anchor rods are fixedly connected by a connecting sleeve, so that multiple self-drilling hollow anchor rods are connected in series to meet the construction length requirements.

[0018] As an optional implementation manner of the present utility model, a drill bit is fixedly installed at the end of the final self-drilling hollow anchor rod which is farthest from the rotary grouting adapter.

[0019] As an optional implementation manner of the utility model, cement slurry outlets are provided on the outer peripheral wall of the self-drilling hollow anchor rod and on the drill bit.

[0020] As an optional embodiment of the utility model, an anchor drilling device with impact function of the utility model includes a drill guide rail and a drill slide seat, the drill is fixedly installed on the drill slide seat, and the drill slide seat is slidably installed on the drill guide rail.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model is an anchor drilling device with impact function. The housing of the rotary grouting adapter is fixed, and the rotary core is rotatable. The rotation of the rotary power head is transmitted to the rotary core through the impactor. The rotation of the rotary core drives the self-drilling hollow anchor to rotate to realize drilling. During the drilling process:

[0023] The housing of the rotary grouting adapter has a grouting chamber. Since the housing is fixed, cement slurry can be introduced into the grouting chamber. The cement slurry enters the grouting channel from the grouting chamber, and then enters the self-drilling hollow anchor rod through the grouting channel. Finally, the grouting port on the self-drilling hollow anchor rod and the drill bit is directly injected into the borehole. Therefore, the anchor drilling device with impact function of the utility model realizes the grouting and anchoring process during the drilling process by means of the rotary grouting adapter. Compared with the prior art method of drilling first and then grouting and anchoring, the construction process is simplified, the operation is simpler, and the construction efficiency is greatly improved.

[0024] The anchor rod is extended by disassembling the self-drilling hollow anchor rod and the rotary grouting adapter, installing a connecting sleeve and extending the self-drilling hollow anchor rod, thereby extending the drilling depth until the designed drilling depth is reached.

[0025] When the drilling is completed, the self-drilling hollow anchor rod does not need to be pulled out. It is only necessary to disconnect the connection between the self-drilling hollow anchor rod and the rotary grouting adapter. The self-drilling hollow anchor rod remains in the borehole to play a reinforcing role. This avoids the problem of hole collapse after the drill rod is pulled out, and solves the technical problem of difficulty in inserting anchor rods under geological conditions where the hole is prone to collapse and broken rock and soil are difficult to form a hole.

[0026] The drilling and grouting process can achieve dynamic grouting while rotating and feeding, so that the cement slurry can penetrate more fully into the surrounding strata, forming a larger diameter grouting body and obtaining better bearing capacity.

[0027] In addition, the utility model is an anchor drilling device with an impact function, which directly connects the impactor to the rotating power head of the drilling rig, connects a rotary grouting adapter to the front end of the impactor to realize the rear installation of the impactor, and then connects a self-drilling hollow anchor to the front end of the rotary grouting adapter and installs a drill bit at the front end of the self-drilling hollow anchor, thereby forming an anchor drilling device that can realize the drilling and grouting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the overall structure of an anchor drilling device with impact function according to an embodiment of the utility model;

[0029] Figure 2 A schematic structural diagram of a rotary grouting adapter according to an embodiment of the utility model;

[0030] Figure 3 An axial view of the impactor of an embodiment of the present utility model. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] See also Figure 1 As shown, an anchor drilling device with impact function in this embodiment includes:

[0037] A drilling machine 1 having a rotary power head 10;

[0038] An impactor 2, one end of which is fixedly connected to a rotary power head 10 of a drilling rig 1;

[0039] A rotary grouting adapter 3, the rotary grouting adapter 3 comprises a shell 301 and a rotating core 302, the rotating core 302 is rotatably installed in the shell 301, the rotating core 302 has a first end and a second end extending out of the shell 301, the first end is fixedly connected to the other end of the impactor 2, the shell 301 has a grouting chamber 306 inside, and the rotating core 302 has a grouting channel 307 connected to the grouting chamber 306;

[0040] The self-drilling hollow anchor rod 4 is fixedly mounted on the second end of the rotating core 302 , and the hollow channel inside the self-drilling hollow anchor rod 4 is connected to the grouting channel 307 of the rotating core 302 .

[0041] In this embodiment, an anchor drilling device with an impact function is provided. The housing 301 of the rotary grouting adapter 3 is fixed, and the rotary core 302 is rotatable. The rotation of the rotary power head 10 is transmitted to the rotary core 302 through the impactor 2. The rotation of the rotary core 302 drives the self-drilling hollow anchor 4 to rotate to achieve drilling. During the drilling process:

[0042] The housing 301 of the rotary grouting adapter 3 has a grouting chamber 306. Since the housing 301 is fixed, cement slurry can be introduced into the grouting chamber 306. The cement slurry enters the grouting channel 307 from the grouting chamber 306, and then enters the self-drilling hollow anchor rod 4 through the grouting channel 307. Finally, the grouting port on the self-drilling hollow anchor rod 4 and the drill bit 6 is directly injected into the borehole. Therefore, the anchor drilling device with impact function of this embodiment realizes the grouting and anchoring process during the drilling process by rotating the grouting adapter 3. Compared with the prior art method of drilling first and then grouting and anchoring, the construction process is simplified, the operation is simpler, and the construction efficiency is greatly improved.

[0043] The anchor rod is extended by disassembling the self-drilling hollow anchor rod 4 and the rotary grouting adapter 3, installing a connecting sleeve and extending the self-drilling hollow anchor rod 4, thereby extending the drilling depth until the designed drilling depth is reached.

[0044] When the drilling is completed, the self-drilling hollow anchor rod 4 does not need to be pulled out. It is only necessary to disconnect the connection between the self-drilling hollow anchor rod 4 and the rotary grouting adapter 3. The self-drilling hollow anchor rod 4 remains in the borehole to play a reinforcing role. This avoids the problem of hole collapse after the drill rod is pulled out, and solves the technical problem of difficulty in inserting anchor rods under geological conditions where the hole is prone to collapse and broken rock and soil are difficult to form holes.

[0045] The drilling and grouting process can realize dynamic grouting while rotating and feeding, so that the cement slurry can penetrate more fully into the surrounding stratum 7, forming a grouting body 8 with a larger diameter and obtaining a better bearing capacity.

[0046] In addition, the present embodiment is an anchor drilling device with an impact function, in which the impactor 2 is directly connected to the rotating power head 10 of the drilling rig 1, and a rotary grouting adapter 3 is connected to the front end of the impactor 2 to realize the post-installation of the impactor 2, and then a self-drilling hollow anchor 4 is connected to the front end of the rotary grouting adapter 3 and a drill bit 6 is installed at the front end of the self-drilling hollow anchor 4, thereby forming an anchor drilling device capable of realizing the drilling and grouting process.

[0047] The present embodiment is an anchor drilling device with an impact function. During drilling, the impactor 2 pushes the self-drilling hollow anchor 4 and the drill bit 6 to achieve the rock breaking and drilling process. The rotary power head 10 of the drilling rig 1 rotates to achieve the rotation of the entire drilling tool (impactor 2, rotary grouting adapter 3, self-drilling hollow anchor 4, connecting sleeve 5, centerer (optional), drill bit 6), thereby achieving the rotary impact drilling process.

[0048] Further, in order to realize the connection between the rotary grouting adapter 3 and the impactor 2, see Figure 2As shown, the first end of the rotating core 302 of this embodiment is closed, and a connecting piece 303 is fixedly connected to the first end. The first end of the rotating core 302 is fixedly connected to the other end of the impactor 2 through the connecting piece 303.

[0049] Specifically, as a specific implementation example of this patent, see Figure 1-3 As shown, the connecting member 303 described in this embodiment includes a spline shaft 304, and the other end of the impactor 2 has a spline hole 201. The spline shaft 304 is plugged into the spline hole 201 and fixedly connected through a plug pin.

[0050] In order to realize the connection between the rotary grouting adapter 3 and the self-drilling hollow anchor 4, see Figure 1 As shown, the second end of the rotating core 302 described in this embodiment has a threaded connection hole 308 extending along the central axis, one end of the grouting channel 307 inside the rotating core 302 is connected to the threaded connection hole 308, and the other end passes through the outer peripheral wall of the rotating core 302 and is connected to the grouting chamber 306 of the shell 301; the self-drilling hollow anchor rod 4 is threadedly fixedly connected to the threaded connection hole 308.

[0051] As an optional implementation of this embodiment, the shell 301 described in this embodiment has a grouting joint 305, and the grouting joint 305 has a grouting joint channel connected to the grouting chamber 306. In this way, by connecting the grouting pipe to the grouting joint 305, cement slurry can be continuously injected into the grouting chamber 306.

[0052] As an optional implementation of this embodiment, the drill rig 1 described in this embodiment is a pneumatic drill rig, and the pneumatic drill rig has a compressed gas supply interface 101. The impactor 2 is connected to the compressed gas supply interface 101 of the pneumatic drill rig through a gas pipeline, and the pneumatic drill rig provides compressed gas to the impactor 2 through the compressed gas supply interface 101, so that the impactor 2 can achieve the impact condition. In this way, the drill rig 1 and the impactor 2 of this embodiment use the same driving source, which makes the overall structure simpler.

[0053] The self-drilling hollow anchor rods 4 described in this embodiment include multiple ones, and two adjacent self-drilling hollow anchor rods 4 are fixedly connected by a connecting sleeve 5, so that multiple self-drilling hollow anchor rods 4 are connected in series to meet the construction length requirements.

[0054] In the anchor drilling device with impact function of the present embodiment, a drill bit 6 is fixedly installed at the end of the final self-drilling hollow anchor 4 which is farthest from the rotary grouting adapter 3 .

[0055] At the same time, cement slurry outlets are provided on the outer peripheral wall of the self-drilling hollow anchor rod 4 and on the drill bit 6 in this embodiment.

[0056] See also Figure 1 As shown, an anchor drilling device with an impact function in this embodiment forms a borehole 9 when the drill bit 6 drills into the formation 7, and the cement slurry enters the self-drilling hollow anchor 4 and the drill bit 6 through the rotating grouting adapter 3 and flows out from the cement slurry outlet to penetrate into the surrounding formation 7, forming a grouting body 8 with a larger diameter, thereby obtaining a better bearing capacity.

[0057] See also Figure 1 As shown, an anchor drilling device with an impact function in this embodiment includes a drill guide rail 12 and a drill slide seat 13. The drill rig 1 is fixedly mounted on the drill slide seat 13, and the drill slide seat 13 is slidably mounted on the drill guide rail 12. In this way, the position of the drill rig 1 can be adjusted according to the specific environment of the construction site, so as to facilitate on-site construction.

[0058] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. An anchor drilling device with impact function, characterized in that: include: Drilling machine, having a rotating power head; An impactor, one end of which is fixedly connected to the rotary power head of the drilling rig; A rotary grouting adapter, the rotary grouting adapter comprising a shell and a rotating core, the rotating core is rotatably installed in the shell, the rotating core has a first end and a second end extending out of the shell, the first end is fixedly connected to the other end of the impactor, the shell has a grouting chamber inside, and the rotating core has a grouting channel connected to the grouting chamber; The self-drilling hollow anchor rod is fixedly mounted on the second end of the rotating core, and the hollow channel inside the self-drilling hollow anchor rod is connected with the grouting channel of the rotating core.

2. The anchor drilling device with impact function according to claim 1, characterized in that: The first end of the rotating core is closed and fixedly connected with a connecting piece. The first end of the rotating core is fixedly connected to the other end of the impactor through the connecting piece.

3. The anchor drilling device with impact function according to claim 2, characterized in that: The connecting piece comprises a spline shaft, and the other end of the impactor is provided with a spline hole. The spline shaft is plugged into the spline hole and fixedly connected via a plug pin.

4. The anchor drilling device with impact function according to claim 1, characterized in that: The second end of the rotating core has a threaded connection hole extending along the central axis, one end of the grouting channel inside the rotating core is connected to the threaded connection hole, and the other end passes through the outer wall of the rotating core and is connected to the grouting chamber of the shell; the self-drilling hollow anchor rod is threadedly fixedly connected to the threaded connection hole.

5. The anchor drilling device with impact function according to claim 1, characterized in that: The shell body is provided with a grouting joint, and the inside of the grouting joint is provided with a grouting joint channel which is connected with the grouting chamber.

6. The anchor drilling device with impact function according to claim 1, characterized in that: The drilling rig is a pneumatic drilling rig having a compressed gas supply interface. The impactor is connected to the compressed gas supply interface of the pneumatic drilling rig through a gas pipeline. The pneumatic drilling rig provides compressed gas to the impactor through the compressed gas supply interface for the impactor to achieve impact working conditions.

7. The anchor drilling device with impact function according to claim 1, characterized in that: The self-drilling hollow anchor rods include a plurality of them, and two adjacent self-drilling hollow anchor rods are fixedly connected via a connecting sleeve, so that the plurality of self-drilling hollow anchor rods are connected in series to meet the construction length requirement.

8. The anchor drilling device with impact function according to claim 7, characterized in that: A drill bit is fixedly installed at the end of the final self-drilling hollow anchor rod which is farthest from the rotary grouting adapter.

9. The anchor drilling device with impact function according to claim 8, characterized in that: Cement slurry outlets are provided on the outer peripheral wall of the self-drilling hollow anchor rod and on the drill bit.

10. The anchor drilling device with impact function according to claim 1, characterized in that: It comprises a drilling rig guide rail and a drilling rig sliding seat, the drilling rig is fixedly mounted on the drilling rig sliding seat, and the drilling rig sliding seat is slidably mounted on the drilling rig guide rail.

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