A rotary grouting adapter and anchor drilling device

Abstract

The utility model discloses a rotary grouting adapter and an anchor drilling device, wherein the rotary grouting adapter comprises: a grouting sleeve having a hollow channel inside, wherein the grouting sleeve has a grouting chamber connected to the hollow channel; a grouting core rotatably installed in the hollow channel of the grouting sleeve, wherein the grouting core has a grouting channel connected to the grouting chamber; a sealing member arranged between the hollow channel of the grouting sleeve and the grouting core, wherein the sealing member is arranged on both sides of the grouting chamber; a cut-off groove is arranged on the inner wall of the hollow channel of the grouting sleeve between the sealing member and the grouting chamber, and / or on the outer wall of the grouting core between the sealing member and the grouting chamber. The rotary grouting adapter of the utility model can effectively seal cement slurry to avoid slurry leakage, has stable and reliable working conditions during use, and has a long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering equipment, in particular to a rotary grouting adapter and an anchor drilling device. Background Art

[0002] At present, the commonly used anchoring construction scheme is to install a drill bit at the front end of a down-the-hole impactor. During the drilling process, the impact of the down-the-hole impactor impacts the front end drill bit to form a borehole, and the depth of the borehole is extended by connecting a drill rod to the rear end of the down-the-hole impactor. When the borehole 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 borehole to fill it with cement slurry, and then anchor bodies such as steel anchor rods are inserted to complete the anchoring construction process.

[0003] It can be seen from this that the existing anchoring construction plan, which is a method of drilling holes first and then grouting anchor rods, has a complicated operating procedure. In addition, when drilling holes under geological conditions where the hole is prone to collapse and the broken rock and soil are 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 are difficult to form a hole, which in turn affects the project quality and causes construction delays.

[0004] Therefore, a technical method of drilling and grouting at the same time during the anchoring construction process was proposed. By adopting a hollow anchor rod, cement slurry is injected into the rotating hollow anchor rod at the same time during the drilling process of the hollow anchor rod. The cement slurry is directly injected into the borehole through the hollow anchor rod, realizing grouting while drilling, which greatly simplifies the anchoring construction process, and has better construction effect and higher construction efficiency, and can be applied to various geological conditions. In order to inject cement slurry into the rotating hollow anchor rod, it is necessary to design a rotary grouting adapter. The grouting adapter has a fixed grouting sleeve and a rotatable grouting rotor arranged in the grouting sleeve. The grouting rotor is connected between the drilling rig and the hollow anchor rod to transmit the power rotation of the drilling rig to the hollow anchor rod, thereby driving the hollow anchor rod to rotate. The grouting sleeve has a grouting chamber inside, and the grouting rotor has a grouting channel inside. The grouting chamber and the grouting channel are communicated. In this way, cement slurry is injected into the grouting chamber in the fixed grouting sleeve, so that during the drilling process of the hollow anchor rod, the cement slurry enters the hollow anchor rod through the grouting channel, thereby completing grouting while drilling.

[0005] However, since the grouting rotor is rotatably arranged in the grouting sleeve and the grouting chamber of the grouting sleeve needs to be injected with cement slurry, a sealing ring needs to be provided between the grouting rotor and the grouting sleeve for dynamic sealing connection. In actual application, the cement slurry may penetrate toward the sealing ring. Once the cement slurry penetrates into the sealing ring, the sealing ring may be easily damaged and fail as the grouting rotor rotates.

[0006] In view of this, this utility model patent is proposed. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a rotary grouting adapter and an anchor drilling device, which can effectively solve the problem that cement slurry penetrates into the sealing ring and causes the sealing ring to be damaged and fail. Specifically, the following technical solutions are adopted:

[0008] A rotary grouting adapter, comprising:

[0009] A grouting sleeve having a hollow channel inside, wherein the grouting sleeve has a grouting chamber connected to the hollow channel;

[0010] A grouting rotary core is rotatably mounted in the hollow channel of the grouting sleeve, and the interior of the grouting rotary core has a grouting channel connected to the grouting chamber;

[0011] A sealing member is arranged between the hollow channel of the grouting sleeve and the grouting rotating core, and the sealing member is arranged on both sides of the grouting chamber;

[0012] A flow intercepting groove is provided on the inner wall of the hollow channel of the grouting sleeve and located between the sealing member and the grouting chamber, and / or on the outer wall of the grouting rotating core and located between the sealing member and the grouting chamber.

[0013] As an optional embodiment of the utility model, the grouting rotary core has a first end and a second end extending out of the grouting sleeve;

[0014] The sealing member comprises a first sealing ring arranged on one side of the grouting chamber near the first end, and a second sealing ring arranged on the other side of the grouting chamber near the second end;

[0015] The intercepting groove comprises a first intercepting groove arranged on the inner wall of the hollow channel of the grouting sleeve between the first sealing ring and the grouting chamber, and a first intercepting groove located between the second sealing ring and the grouting chamber.

[0016] As an optional implementation manner of the present utility model, the first intercepting grooves include a plurality of grooves distributed axially along the hollow channel of the grouting sleeve.

[0017] As an optional embodiment of the present utility model, the intercepting groove includes a second intercepting groove arranged on the outer wall of the grouting rotor between the first sealing ring and the grouting chamber, and between the second sealing ring and the grouting chamber.

[0018] As an optional embodiment of the present invention, the second intercepting groove is located between the first intercepting groove and the first sealing ring, and between the first intercepting groove and the second sealing ring; the grouting core has a return channel connecting the second intercepting groove and the grouting channel.

[0019] As an optional embodiment of the present utility model, the second interception groove includes multiple ones, which are distributed along the axial direction of the grouting core; the second interception groove closest to the first sealing ring or the second sealing ring is connected to the grouting channel through the return channel, or all the second interception grooves are connected to the grouting channel through the return channel.

[0020] As an optional embodiment of the present utility model, the first interception groove is an annular groove arranged on the inner wall of the hollow channel of the grouting sleeve, and the second interception groove is an annular groove arranged on the outer peripheral wall of the grouting core; the return channel is provided with one or more, connecting the second interception groove and the grouting channel.

[0021] As an optional embodiment of the present utility model, the grouting channel includes an axial grouting channel and a radial grouting channel, the axial grouting channel and the grouting rotor are arranged with the same central axis, one end of the axial grouting channel is located in the grouting rotor, and the other end passes through the first end; the radial grouting channel is arranged along the radial direction of the grouting rotor, one end of the radial grouting channel is connected with the axial grouting channel, and the other end passes through the outer peripheral wall of the grouting rotor and is connected with the grouting chamber; the return channel is connected to the axial grouting channel and / or the radial grouting channel.

[0022] As an optional embodiment of the present utility model, the grouting chamber is an annular chamber arranged inside the grouting sleeve, and the radial grouting channels include multiple ones, which are evenly distributed along the circumferential direction of the grouting rotor core, and the multiple radial grouting channels are connected to the grouting chamber and the axial grouting channel, and the return channel is connected to the radial grouting channel.

[0023] The utility model also provides an anchor drilling device with the rotary grouting adapter, comprising:

[0024] A drilling rig, wherein one end of the grouting rotary core of the rotary grouting adapter is mounted on the drill bit of the drilling rig;

[0025] A drill tail sleeve, one end of which is fixedly mounted on the other end of the grouting rotary core of the rotary grouting adapter;

[0026] The hollow anchor rod is fixedly mounted on the drill tail sleeve, and the inner hole of the hollow anchor rod is connected with the grouting hole of the grouting rotary core.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The utility model provides a rotary grouting adapter, which can effectively intercept cement slurry by setting a cut-off groove on the penetration path between the seal and the grouting chamber, and prevent the cement slurry from further penetrating into the seal and causing damage and failure. Therefore, the utility model can effectively seal the cement slurry and prevent leakage. The working condition is stable and reliable during use, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A structural schematic diagram of a rotary grouting adapter according to an embodiment of the utility model (implementation method 1);

[0030] Figure 2 A structural schematic diagram of a rotary grouting adapter according to an embodiment of the utility model (implementation method 2). 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 and Figure 2 As shown, a rotary grouting adapter of this embodiment includes:

[0037] The grouting sleeve 100 has a hollow channel inside, and the grouting sleeve 100 has a grouting chamber 101 in communication with the hollow channel;

[0038] A grouting rotary core 200 is rotatably mounted in the hollow channel of the grouting sleeve 100, and the grouting rotary core 200 has a grouting channel (203, 205) in communication with the grouting chamber 101;

[0039] Sealing members (301, 302) are arranged between the hollow channel of the grouting sleeve 100 and the grouting rotating core 200, and the sealing members (301, 302) are arranged on both sides of the grouting chamber 101;

[0040] A flow intercepting groove is provided on the inner wall of the hollow channel of the grouting sleeve 100 between the sealing member (301, 302) and the grouting chamber 101, and / or on the outer wall of the grouting core 200 between the sealing member (301, 302) and the grouting chamber 101.

[0041] The rotary grouting adapter of the present embodiment can effectively intercept cement slurry by providing an interception groove on the penetration path between the seal (301, 302) and the grouting chamber 101, thereby preventing the cement slurry from further penetrating into the seal (301, 302) and causing damage and failure. Therefore, the rotary grouting adapter of the present embodiment can effectively seal the cement slurry and prevent leakage of slurry. The working condition is stable and reliable during use, and the service life is long.

[0042] As an optional implementation of this embodiment, the grouting core 200 described in this embodiment has a first end 201 and a second end 202 extending out of the grouting sleeve 100; the sealing member includes a first sealing ring 301 arranged on one side of the grouting chamber 101 near the first end 201, and a second sealing ring 302 arranged on the other side of the grouting chamber 101 near the second end 202; the intercepting groove includes a first intercepting groove 102 arranged on the inner wall of the hollow channel of the grouting sleeve 100 between the first sealing ring 301 and the grouting chamber 101, and between the second sealing ring 302 and the grouting chamber 101. In this embodiment, the cement slurry that penetrates into the first sealing ring 301 and the second sealing ring 302 in the grouting chamber 101 can be intercepted by the first intercepting groove 102, and the cement slurry is deposited in the first intercepting groove 102 to avoid further penetration into the first sealing ring 301 and the second sealing ring 302 to cause damage.

[0043] Furthermore, the cement slurry deposited in the first intercepting groove 102 can be flushed by regularly disassembling the grouting rotor 200 and the grouting sleeve 100 .

[0044] Specifically, the first interception groove 102 described in this embodiment includes multiple ones, which are distributed axially along the hollow channel of the grouting sleeve 100, so that multiple interceptions can be formed, and the interception effect is better.

[0045] As an optional implementation of this embodiment, the interception groove of this embodiment includes a second interception groove 207 disposed on the outer wall of the grouting core 200 between the first sealing ring 301 and the grouting chamber 101, and between the second sealing ring 302 and the grouting chamber 101. This embodiment can further achieve the interception of cement slurry by providing the second interception groove 207.

[0046] Specifically, the second intercepting groove 207 described in this embodiment is located between the first intercepting groove 102 and the first sealing ring 301, and between the first intercepting groove 102 and the second sealing ring 302; the grouting core 200 has a return channel 206 inside that connects the second intercepting groove 207 and the grouting channel (203, 205). In this embodiment, the cement slurry deposited in the second intercepting groove 207 can be returned to the grouting channel (203, 205) through the return channel 206 and re-injected into the hollow anchor rod.

[0047] As an optional implementation of this embodiment, the second intercepting groove 207 described in this embodiment includes multiple ones, which are distributed along the axial direction of the grouting core 200; the second intercepting groove 207 closest to the first sealing ring 301 or the second sealing ring 302 is connected to the grouting channel (203, 205) through the return channel 206 (see Figure 2 Alternatively, all second interception grooves 207 are connected to the grouting channels (203, 205) through the return channel 206 (see Figure 1 shown).

[0048] As an optional implementation of this embodiment, the first intercepting groove 102 described in this embodiment is an annular groove arranged on the inner wall of the hollow channel of the grouting sleeve 100, and the second intercepting groove 207 is an annular groove arranged on the outer peripheral wall of the grouting core 200; the return channel 206 is provided with one or more, connecting the second intercepting groove 207 with the grouting channel (203, 205).

[0049] Specifically, the grouting channel described in this embodiment includes an axial grouting channel 203 and a radial grouting channel 205. The axial grouting channel 203 is arranged coaxially with the grouting core 200, one end of the axial grouting channel 203 is located in the grouting core 200, and the other end passes through the first end 201; the radial grouting channel 205 is arranged along the radial direction of the grouting core 200, one end of the radial grouting channel 205 is connected with the axial grouting channel 203, and the other end passes through the outer peripheral wall of the grouting core 200 and is connected with the grouting chamber 101; the reflux channel 206 is connected with the axial grouting channel 203 and / or the radial grouting channel 205.

[0050] Furthermore, the grouting chamber 101 described in this embodiment is an annular chamber arranged inside the grouting sleeve 100, and the radial grouting channels 205 include a plurality of channels evenly distributed along the circumferential direction of the grouting core 200. The plurality of radial grouting channels 205 are connected to the grouting chamber 101 and the axial grouting channel 203, and the return channel 206 is connected to the radial grouting channel 205. This is because the internal pressure of the radial grouting channel 205 is lower than the internal pressure of the axial grouting channel 203, therefore, connecting the return channel 206 to the radial grouting channel 205 is more convenient for the reflux of cement slurry.

[0051] In addition, the interior of the axial grouting channel 203 of the present embodiment has an internal thread for connecting the drill tail sleeve, and the hollow anchor rod is installed on the drill tail sleeve.

[0052] The second end 202 of the grouting rotary core 200 of this embodiment has a threaded connection channel 204 inside for connecting to a drilling rig. The threaded connection channel 204 is a blind hole and is not connected to the grouting channel.

[0053] The grouting sleeve 100 of the present embodiment has a grouting joint 208 , and the inside of the grouting joint 208 has a joint channel connected to the grouting chamber 101 . The grouting joint 208 is used to connect the grouting pipe to realize grouting into the grouting chamber 101 .

[0054] This embodiment also provides an anchor drilling device having the rotary grouting adapter, comprising:

[0055] A drilling rig, wherein one end of the grouting rotary core 200 of the rotary grouting adapter is mounted on the drill bit of the drilling rig;

[0056] A drill tail sleeve, one end of which is fixedly mounted on the other end of the grouting rotary core 200 of the rotary grouting adapter;

[0057] The hollow anchor rod is fixedly mounted on the drill tail sleeve, and the inner channel of the hollow anchor rod is communicated with the grouting channel of the grouting rotary core 200.

[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. A rotary grouting adapter, characterized in that: include: A grouting sleeve having a hollow channel inside, wherein the grouting sleeve has a grouting chamber connected to the hollow channel; A grouting rotary core is rotatably mounted in the hollow channel of the grouting sleeve, and the interior of the grouting rotary core has a grouting channel connected to the grouting chamber; A sealing member is arranged between the hollow channel of the grouting sleeve and the grouting rotating core, and the sealing member is arranged on both sides of the grouting chamber; A flow interception groove is provided on the inner wall of the hollow channel of the grouting sleeve and located between the sealing member and the grouting chamber, and / or on the outer wall of the grouting rotating core and located between the sealing member and the grouting chamber.

2. A rotary grouting adapter according to claim 1, characterized in that: The grouting rotating core has a first end and a second end extending out of the grouting sleeve; The sealing member comprises a first sealing ring arranged on one side of the grouting chamber near the first end, and a second sealing ring arranged on the other side of the grouting chamber near the second end; The intercepting groove comprises a first intercepting groove arranged on the inner wall of the hollow channel of the grouting sleeve between the first sealing ring and the grouting chamber, and a first intercepting groove located between the second sealing ring and the grouting chamber.

3. A rotary grouting adapter according to claim 2, characterized in that: The first intercepting grooves include a plurality of grooves distributed axially along the hollow channel of the grouting sleeve.

4. A rotary grouting adapter according to claim 2, characterized in that: The intercepting groove comprises a first intercepting groove arranged on the outer wall of the grouting rotary core between the first sealing ring and the grouting chamber, and a second intercepting groove arranged between the second sealing ring and the grouting chamber.

5. A rotary grouting adapter according to claim 4, characterized in that: The second intercepting groove is located between the first intercepting groove and the first sealing ring, and between the first intercepting groove and the second sealing ring; the grouting rotary core has a return channel connecting the second intercepting groove and the grouting channel.

6. A rotary grouting adapter according to claim 5, characterized in that: The second intercepting grooves include multiple ones, which are distributed along the axial direction of the grouting core; the second intercepting groove closest to the first sealing ring or the second sealing ring is connected to the grouting channel through the return channel, or all the second intercepting grooves are connected to the grouting channel through the return channel.

7. A rotary grouting adapter according to claim 6, characterized in that: The first intercepting groove is an annular groove arranged on the inner wall of the hollow channel of the grouting sleeve, and the second intercepting groove is an annular groove arranged on the outer peripheral wall of the grouting core; one or more return channels are arranged to connect the second intercepting groove and the grouting channel.

8. A rotary grouting adapter according to claim 6, characterized in that: The grouting channel comprises an axial grouting channel and a radial grouting channel. The axial grouting channel is arranged with the same central axis as the grouting rotor core, one end of the axial grouting channel is located in the grouting rotor core, and the other end passes through the first end; the radial grouting channel is arranged along the radial direction of the grouting rotor core, one end of the radial grouting channel is connected with the axial grouting channel, and the other end passes through the outer peripheral wall of the grouting rotor core and is connected with the grouting chamber; the return channel is connected with the axial grouting channel and / or the radial grouting channel.

9. A rotary grouting adapter according to claim 8, characterized in that: The grouting chamber is an annular chamber arranged inside the grouting sleeve. The radial grouting channels include multiple ones, which are evenly distributed along the circumferential direction of the grouting rotor. The multiple radial grouting channels are connected to the grouting chamber and the axial grouting channel, and the return channel is connected to the radial grouting channel.

10. An anchor drilling device having a rotary grouting adapter according to any one of claims 1 to 9, characterized in that: include: A drilling rig, wherein one end of the grouting rotary core of the rotary grouting adapter is mounted on the drill bit of the drilling rig; A drill tail sleeve, one end of which is fixedly mounted on the other end of the grouting rotary core of the rotary grouting adapter; The hollow anchor rod is fixedly mounted on the drill tail sleeve, and the inner hole of the hollow anchor rod is connected with the grouting hole of the grouting rotary core.

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