Connection type anchor rod shank sleeve and anchor rod drilling device

Abstract

The utility model discloses a connection type anchor rod bit shank sleeve and an anchor rod drilling device, the connection type anchor rod bit shank sleeve comprises a sleeve body, a first inner connection threaded hole section is arranged in one end of the sleeve body, and a second inner connection threaded hole section and a third inner connection threaded hole section which are communicated with each other are sequentially arranged in the other end of the sleeve body from inside to outside. The inner diameter of the second inner connection threaded hole section is smaller than that of the third inner connection threaded hole section, and the inner diameter of the first inner connection threaded hole section is equal to that of the third inner connection threaded hole section. The first inner connection threaded hole section, the second inner connection threaded hole section and the third inner connection threaded hole section are the same in rotation direction, the first inner connection threaded hole section is used for being connected with an upper-stage anchor rod, the third inner connection threaded hole section is used for being connected with a lower-stage anchor rod, and the second inner connection threaded hole section is used for being connected with a rock drill. The connecting type anchor rod bit shank sleeve can be connected with a rock drill and can also be connected with a next-stage anchor rod, the problem that the bit shank sleeve cannot be detached from the anchor rod is solved, and smooth engineering construction is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering equipment technology, specifically to a connecting anchor bolt tail sleeve and an anchor bolt drilling device. Background Technology

[0002] Currently, anchoring construction requires the use of anchor drilling devices, which consist of anchor bolts, a drilling rig, and a connecting sleeve. Construction is carried out by drilling one anchor bolt at a time. After each anchor bolt is drilled, the connection between the anchor bolt and the drilling rig needs to be disconnected to install and drill the next anchor bolt, until the predetermined depth is reached. During construction, the drilling rig and the anchor bolt are fixedly connected by a drill bit sleeve. When it is necessary to remove the anchor bolt and install the next one, a hydraulic clamp is used to hold the anchor bolt in place, and the output end of the rock drill is controlled to rotate in the opposite direction to disengage from the anchor bolt, thus achieving disassembly.

[0003] However, in the excavation of roadways or tunnels in metal mines, R51 self-drilling anchor bolts are commonly used as support for advanced pipe roofs. The output end of the rock drills used in construction is typically a T38 external thread. Therefore, the connection between the rock drill's output end and the R51 self-drilling anchor bolt is achieved through a transitional drill tail sleeve. However, the R51 thread has a small helix angle and a large thread locking force, while the T38 thread has a large helix angle and a small thread locking force. In actual disassembly, the T38 end easily detaches after drilling, while the R51 end does not, causing the drill tail sleeve to separate from the rock drill's output end. Since the connection between the drill tail sleeve and the anchor bolt is very tight, it is impossible to reconnect the anchor bolt, requiring a significant amount of manual time for disassembly. Furthermore, the frequent disassembly of anchor bolts during anchoring construction results in a substantial expenditure of time and effort in disassembly.

[0004] In view of the above, this utility model patent is hereby proposed. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a connecting anchor bolt tail sleeve and an anchor bolt drilling device, which solves the technical problem of the anchor bolt and tail sleeve being unable to detach during anchor bolt drilling, leading to cumbersome anchor bolt splicing. Specifically, the following technical solution is adopted:

[0006] A connecting anchor bolt tail sleeve includes a sleeve body. One end of the sleeve body has a first internal connecting threaded hole section inside, and the other end of the sleeve body has a second internal connecting threaded hole section and a third internal connecting threaded hole section that are connected to each other. The second internal connecting threaded hole section is located inside the third internal connecting threaded hole section. The inner diameter of the second internal connecting threaded hole section is smaller than the inner diameter of the third internal connecting threaded hole section, and the inner diameter of the first internal connecting threaded hole section is equal to the inner diameter of the third internal connecting threaded hole section.

[0007] The first, second, and third internal connecting threaded hole sections have the same rotation direction. The first internal connecting threaded hole section is used to connect to the previous level anchor rod, the third internal connecting threaded hole section is used to connect to the next level anchor rod, and the second internal connecting threaded hole section is used to connect to the output end of the rock drill.

[0008] As an optional embodiment of this utility model, in a connecting anchor bolt tail sleeve of this utility model, the first inner connecting threaded hole section and the second inner connecting threaded hole section are connected through a connecting through hole section.

[0009] As an optional embodiment of this utility model, in a connecting anchor bolt tail sleeve of this utility model, the axial length of the first inner connecting threaded hole section is equal to the axial length of the third inner connecting threaded hole section, and the axial length of the second inner connecting threaded hole section is greater than or equal to the axial length of the third inner connecting threaded hole section.

[0010] As an optional embodiment of this utility model, a connecting anchor rod tail sleeve of this utility model has a tool relief groove on the inner side of the first inner connecting threaded hole section, and the second inner connecting threaded hole section is connected to the tool relief groove.

[0011] As an optional embodiment of this utility model, a connecting anchor bolt tail sleeve of this utility model includes a threaded pad. The threaded pad is screwed into the retraction groove from the first internal connecting threaded hole section. The output end of the rock drill is screwed into the second internal connecting threaded hole section, and the end of the output end of the rock drill abuts against the threaded pad.

[0012] As an optional embodiment of this utility model, a connecting anchor rod tail sleeve of this utility model has an outer connecting thread on the outer periphery of the threaded pad that is threadedly connected to the first inner connecting threaded hole section.

[0013] As an optional embodiment of this utility model, in a connecting anchor bolt tail sleeve of this utility model, the axial width of the cutter relief groove is greater than the axial width of the threaded pad.

[0014] As an optional embodiment of this utility model, in a connecting anchor rod tail sleeve of this utility model, there is an installation gap of 3 to 5 mm between the inner threaded pad of the cutter groove and the end of the second inner connecting threaded hole section.

[0015] As an optional embodiment of this utility model, in a connecting anchor bolt tail sleeve of this utility model, the first inner connecting threaded hole section and the third inner connecting threaded hole section are both R51 type internal threads, and the second inner connecting threaded hole section is a T38 type internal thread.

[0016] This utility model also provides an anchor drilling device with the aforementioned connecting anchor bolt tail sleeve, comprising:

[0017] A rock drill, wherein the output end of the rock drill is threadedly connected to the second internal connecting threaded hole section of the connecting anchor rod tail sleeve;

[0018] Anchor bolts, comprising multiple bolts, are threadedly connected to the first internal threaded section of a connecting anchor bolt tail sleeve. The output end of the rock drill drives the upper-level anchor bolt to drill. When the upper-level anchor bolt has finished drilling, the output end of the rock drill reverses and disengages from the connecting anchor bolt tail sleeve. One end of the next-level anchor bolt is threadedly connected to the third internal threaded section of the connecting anchor bolt tail sleeve, and the other end of the next-level anchor bolt is connected to the output end of the rock drill through another connecting anchor bolt tail sleeve. This process is repeated until the connection length of the anchor bolts meets the preset length requirement.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model discloses a connecting anchor bolt tail sleeve. During actual drilling, the upper-level anchor bolt is threadedly connected to the first internal threaded section of the connecting anchor bolt tail sleeve. The output end of the rock drill drives the upper-level anchor bolt to drill. When the upper-level anchor bolt is drilled, the output end of the rock drill reverses and disengages from the connecting anchor bolt tail sleeve. One end of the lower-level anchor bolt is threadedly connected to the third internal threaded section of the connecting anchor bolt tail sleeve, and the other end of the lower-level anchor bolt is connected to the output end of the rock drill through another connecting anchor bolt tail sleeve. This process is repeated until the connection length of the anchor bolt meets the preset length requirement.

[0021] Therefore, the connecting anchor bolt tail sleeve of this utility model utilizes the characteristic that the anchor bolt and the tail sleeve cannot be separated during the existing anchor bolt drilling process. The connecting anchor bolt tail sleeve realizes the connection between the anchor bolt and the output end of the rock drill. At the same time, the connecting anchor bolt tail sleeve realizes the splicing between the upper-level anchor bolt and the lower-level anchor bolt. As a connecting component between anchor bolts, the connecting anchor bolt tail sleeve solves the technical problem of the anchor bolt and the tail sleeve being unable to be separated during the anchor bolt drilling process, which leads to the cumbersome continuation of anchor bolts. Attached image description:

[0022] Figure 1 This utility model provides a schematic diagram of the structure of a connecting anchor bolt tail sleeve. Figure 1 ;

[0023] Figure 2 This utility model provides a schematic diagram of the structure of a connecting anchor bolt tail sleeve. Figure 2 ;

[0024] Figure 3 A schematic diagram of the structure of an anchor drilling device according to an embodiment of this utility model. Figure 1 ;

[0025] Figure 4A schematic diagram of the structure of an anchor drilling device according to an embodiment of this utility model. Figure 2 ;

[0026] Figure 5 A schematic diagram of the structure of an anchor drilling device according to an embodiment of this utility model. Figure 3 . Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0028] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0029] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] See Figures 1-5As shown, a connecting anchor bolt tail sleeve of this embodiment includes a sleeve body 101. One end of the sleeve body 101 has a first internal threaded hole section 102, and the other end of the sleeve body 101 has a second internal threaded hole section 104 and a third internal threaded hole section 103 that are connected to each other. The second internal threaded hole section 104 is located inside the third internal threaded hole section 103, and the inner diameter of the second internal threaded hole section 104 is smaller than the inner diameter of the third internal threaded hole section 103. The inner diameter of the first internal connecting threaded hole section 102 is equal to the inner diameter of the third internal connecting threaded hole section 103; the first internal connecting threaded hole section 102, the second internal connecting threaded hole section 104 and the third internal connecting threaded hole section 103 have the same rotation direction; the first internal connecting threaded hole section 102 is used to connect the previous level anchor rod 200A; the third internal connecting threaded hole section 103 is used to connect the next level anchor rod 200B; and the second internal connecting threaded hole section 104 is used to connect the output end 301 of the rock drill 300.

[0033] See Figures 3-4 As shown in the figure, in the actual drilling process of this embodiment, the upper-level anchor rod 200A is threadedly connected to the first internal connecting threaded hole section 102 of the connecting anchor rod tail sleeve 100. The output end 301 of the rock drill 300 drives the upper-level anchor rod 200A to drill. When the upper-level anchor rod 200A is drilled, the output end 301 of the rock drill 300 reverses and disengages from the connecting anchor rod tail sleeve 100. One end of the lower-level anchor rod 200B is threadedly connected to the third internal connecting threaded hole section of the connecting anchor rod tail sleeve 100, and the other end of the lower-level anchor rod 200B is connected to the output end of the rock drill 300 through another connecting anchor rod tail sleeve 100. This operation is repeated until the connection length of the anchor rod meets the preset length requirement.

[0034] Therefore, the connecting anchor bolt tail sleeve 100 in this embodiment utilizes the characteristic that the anchor bolt and the tail sleeve cannot be separated during the existing anchor bolt drilling process. The connecting anchor bolt tail sleeve 100 realizes the connection between the anchor bolt and the output end 301 of the rock drill 300. At the same time, the connecting anchor bolt tail sleeve 100 realizes the splicing between the upper-level anchor bolt 200A and the lower-level anchor bolt 200B. As a connecting component between anchor bolts, the connecting anchor bolt tail sleeve 100 solves the technical problem that the anchor bolt and the tail sleeve cannot be separated during the anchor bolt drilling process, which leads to the cumbersome continuation of anchor bolts.

[0035] See Figure 1As shown, in this embodiment, the first internal connecting threaded hole section 102 and the second internal connecting threaded hole section 104 are connected by a connecting through hole section 105. Thus, the first internal connecting threaded hole section 102, the second internal connecting threaded hole section 104, and the third internal connecting threaded hole section 103 form a through channel, allowing grout to be injected through the through channel during drilling. Combined with grouting holes opened on the outer wall of the anchor bolt, this enables simultaneous drilling and grouting during anchor bolt drilling, greatly improving the drilling efficiency.

[0036] As an optional implementation of this embodiment, the axial length of the first internal connecting threaded hole segment 102 is equal to the axial length of the third internal connecting threaded hole segment 103, and the axial length of the second internal connecting threaded hole segment 104 is greater than or equal to the axial length of the third internal connecting threaded hole segment 103. In this way, the first internal connecting threaded hole segment 102 and the third internal connecting threaded hole segment 103 ensure stability when connecting to the anchor bolt, and the second internal connecting threaded hole segment 104 also ensures a stable connection when connecting to the output end 301 of the rock drill 300.

[0037] See Figure 2 As shown, in this embodiment, the inner side of the first inner connecting threaded hole section 102 has a tool relief groove 106, and the second inner connecting threaded hole section 104 is connected to the tool relief groove 102.

[0038] Further, see Figure 5 As shown, this embodiment of a connecting anchor bolt tail sleeve includes a threaded pad 107. The threaded pad 107 is screwed into the relief groove 106 through a first internal connecting threaded hole section 102. The output end 301 of the rock drill 300 is screwed into the second internal connecting threaded hole section 104, and the end of the output end 301 of the rock drill 300 abuts against the threaded pad 107. Thus, this embodiment achieves this by adding the threaded pad 107 and eliminating the end of the sleeve body. Furthermore, during installation and use, the threaded pad 107 maintains a small distance from the threaded step of the output end 301 of the rock drill 300 connected within the sleeve body. The principle and rationale for this are as follows:

[0039] 1. The output end 301 of the rock drill 300 is in direct contact with the threaded pad 107, and the threaded pad 107 is in contact with the end face of the anchor rod. In this way, the impact force of the rock drill 300 is transmitted directly through the end face, rather than through the threaded connection, thus avoiding deformation of the thread.

[0040] 2. Because the threaded pad 107 maintains a small distance from the threaded step of the output end 301 of the rock drill 300 connected in the sleeve, when the anchor rod needs to be disassembled, the output end 301 of the rock drill 300 reverses, and the output end 301 of the rock drill 300 is easier to disengage.

[0041] The threaded pad 107 described in this embodiment has an external connecting thread on its outer periphery that is threadedly connected to the first internal connecting threaded hole section 102. The threaded pad 107 has an external connecting thread on its outer surface. During installation, the threaded pad 107 is screwed into the first internal connecting threaded hole section 102 until it disengages from the thread, and then fitted into the relief groove 106. Because the threaded pad 107 has an external connecting thread on its outer surface, it is not easily dislodged from the drill bit sleeve.

[0042] See Figure 2 As shown, in this embodiment, the axial width D1 of the relief groove 106 is greater than the axial width D2 of the threaded pad 107. Thus, in this embodiment, there is a 3-5 mm installation gap d between the threaded pad 107 inside the relief groove 106 and the end of the second internal connecting threaded hole section 104.

[0043] As an optional implementation of this embodiment, the first internal connecting threaded hole section 102 and the third internal connecting threaded hole section 103 are both R51 type internal threads, and the second internal connecting threaded hole section 104 is a T38 type internal thread.

[0044] See Figures 3-5 As shown, this embodiment also provides an anchor drilling device with the aforementioned connecting anchor bolt tail sleeve 100, comprising:

[0045] A rock drill 300, wherein the output end 301 of the rock drill 300 is threadedly connected to the second internal connecting threaded hole section 104 of the connecting anchor rod tail sleeve 100.

[0046] Anchor bolts, including multiple bolts, are used. The upper-level anchor bolt 200A is threadedly connected to the first internal threaded section 102 of the connecting anchor bolt tail sleeve 100. The output end 301 of the rock drill 300 drives the upper-level anchor bolt 200A to drill. When the upper-level anchor bolt 200A has finished drilling, the output end 301 of the rock drill 300 reverses and disengages from the connecting anchor bolt tail sleeve 100. One end of the next-level anchor bolt 200B is threadedly connected to the third internal threaded section 103 of the connecting anchor bolt tail sleeve 100, and the other end of the next-level anchor bolt 200B is connected to the output end 301 of the rock drill 300 through another connecting anchor bolt tail sleeve 100. This process is repeated until the connection length of the anchor bolts meets the preset length requirement.

[0047] The anchor drilling device of this embodiment includes a drill bit 400, which is installed at the end of the anchor rod and drives the anchor rod to achieve drilling.

[0048] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A connecting bolt shank sleeve, characterized in that The sleeve body has a first inner connecting threaded hole section at one end, a second inner connecting threaded hole section and a third inner connecting threaded hole section connected at the other end, the second inner connecting threaded hole section is located inside the third inner connecting threaded hole section, the inner diameter of the second inner connecting threaded hole section is smaller than that of the third inner connecting threaded hole section, and the inner diameter of the first inner connecting threaded hole section is equal to that of the third inner connecting threaded hole section. The first inner connecting threaded hole section, the second inner connecting threaded hole section and the third inner connecting threaded hole section have the same rotation direction, the first inner connecting threaded hole section is used for connecting an upper anchor rod, the third inner connecting threaded hole section is used for connecting a lower anchor rod, and the second inner connecting threaded hole section is used for connecting the output end of the rock drill.

2. A connecting bolt shank sleeve according to claim 1, characterized in that The first inner connecting threaded hole section and the second inner connecting threaded hole section are connected through a connecting through hole section.

3. A connecting bolt shank sleeve according to claim 1, characterized in that The axial length of the first inner connecting threaded hole section is equal to that of the third inner connecting threaded hole section, and the axial length of the second inner connecting threaded hole section is greater than or equal to that of the third inner connecting threaded hole section.

4. A connecting bolt shank sleeve according to claim 1, characterized in that The first inner connecting threaded hole section has a tool withdrawal groove at the inner side, and the second inner connecting threaded hole section is connected to the tool withdrawal groove.

5. A connecting bolt shank sleeve according to claim 4, characterized in that The output end of the rock drill is screwed into the second inner connecting threaded hole section, and the end of the output end of the rock drill abuts against the threaded spacer.

6. A connecting bolt shank sleeve according to claim 5, characterized in that The outer periphery of the threaded spacer has a spacer outer connecting thread for thread connection with the first inner connecting threaded hole section.

7. A connecting bolt shank sleeve according to claim 5, characterized in that The axial width of the tool withdrawal groove is greater than that of the threaded spacer.

8. A connecting bolt shank sleeve according to claim 7, characterized in that The threaded spacer and the end of the second inner connecting threaded hole section have an installation gap of 3-5 mm in the tool withdrawal groove.

9. A connecting bolt shank sleeve according to claim 1, characterized in that The first inner connecting threaded hole section and the third inner connecting threaded hole section are R51 type inner threads, and the second inner connecting threaded hole section is a T38 type inner thread.

10. A rod drilling apparatus having a connecting rod shank sleeve according to any one of claims 1 to 9, characterized in that The rock drill is connected with the second inner connecting threaded hole section of the connecting anchor rod tail sleeve through the output end of the rock drill. The anchor rod includes a plurality of anchor rods, an upper anchor rod is connected with the first inner connecting threaded hole section of the connecting anchor rod tail sleeve through thread connection, the output end of the rock drill drives the upper anchor rod to drill, when the upper anchor rod drilling is completed, the output end of the rock drill is reversed to be disconnected with the connecting anchor rod tail sleeve, one end of a lower anchor rod is connected with the third inner connecting threaded hole section of the connecting anchor rod tail sleeve through thread connection, and the other end of the lower anchor rod is connected with the output end of the rock drill through another connecting anchor rod tail sleeve; the operation is sequentially performed until the connecting length of the anchor rod meets the preset length requirement. ​

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