CN215890060U

CN215890060U - Self-drilling type recoverable anchor rod

Info

Publication number: CN215890060U
Application number: CN202120500914.XU
Authority: CN
Inventors: 胥东; 叶圣炯; 林凡科; 洪学聪; 王哲; 王下军; 娄彬; 左晨刚; 王萍; 王津; 高骏
Original assignee: Hangzhou City Construction Development Group Co ltd
Current assignee: Hangzhou City Construction Development Group Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2022-02-22
Anticipated expiration: 2031-03-09

Abstract

The utility model provides a self-drilling type recyclable anchor rod, and belongs to the technical field of anchor rods. It includes the outer stock that cavity set up, outer stock on detachable be equipped with recoverable anchor head, recoverable anchor head and outer anchor rod between still be equipped with recoverable interior stock structure, recoverable anchor head be conical, the junction of outer anchor rod and recoverable anchor head be equipped with the cross-section and be the transition portion that the annular just inclines to set up. After the outer anchor rod and the recyclable anchor head are drilled into the rock stratum, the recyclable anchor head can be taken out and recycled from the inside of the hollow outer anchor rod through the recyclable inner anchor rod structure, resource waste is reduced, cost can be effectively reduced, and the transition part on the outer anchor rod is matched with the recyclable anchor head, so that the blocking of the outer anchor rod on drilling can be reduced.

Description

Self-drilling type recoverable anchor rod

Technical Field

The utility model belongs to the technical field of anchor rods, and relates to a self-drilling type recyclable anchor rod.

Background

The self-advancing anchor rod has the function of integrating drilling, grouting and anchoring, is an advanced anchoring system, solves the problem of hole collapse during the construction of a large pipe shed, and can ensure the grouting effect under the complex geological conditions. The corresponding specification length of the self-advancing anchor rod is generally 2m, 3m, 4m or even longer, the drilled anchor hole is also 2m, 3m or even deeper, and the diameter of the rod body of the self-advancing anchor rod is generally 25mm to 60mm, so the slenderness ratio of the self-advancing anchor rod is very large; the existing self-advancing anchor rod consists of a hollow rod body, a connecting sleeve, a drill bit, a base plate and a nut. When the self-advancing anchor rod is used, a common drilling machine such as a handheld pneumatic drill is used for driving the hollow rod body, and then the hollow rod body drives the drill bit to advance in a rock stratum, but the self-advancing anchor rod cannot be taken out after the self-advancing anchor rod is used, so that great waste is caused.

In order to overcome the defects of the prior art, people continuously explore and propose various solutions, for example, a self-drilling type recoverable anchor rod is disclosed in a Chinese patent application number: 201320451920.6], comprising a hollow drill rod, a hot-melt force transfer belt, a high-pressure nozzle and an anchoring body of the high-pressure jet grouting pile, wherein the recovery of the anchor rod is realized by the hot-melt force transfer belt, and the rod body of the anchor rod is also used as the drill rod for constructing the high-pressure jet grouting pile during construction. The anchor rod has the advantages that the anti-pulling bearing capacity of the anchor rod is improved, the main stress component of the anchor rod is convenient to recover, the installation and recovery efficiency is high, the installation and recovery construction is convenient, the manufacturing cost is low, the environmental protection benefit is outstanding, the underground over-ground red line problem of the anchor rod in the city is successfully solved, and the anchor rod can be widely applied to the engineering field of foundation pit enclosure and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provide a self-drilling recyclable anchor rod.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a from recoverable stock of drilling, includes the outer stock of cavity setting, outer stock on detachable be equipped with recoverable anchor head, recoverable anchor head and outer stock between still be equipped with recoverable interior stock structure, recoverable anchor head be conical, the junction of outer stock and recoverable anchor head be equipped with the cross-section and be the transition portion that the annular just inclines to set up.

In foretell recoverable stock of formula of boring certainly, recoverable interior stock structure include stock in, No. two in stock subassembly and No. three in the stock, a interior stock both ends link to each other with recoverable anchor head and No. two in the stock subassembly respectively, No. three interior stock and No. two in the stock subassembly keep away from a interior stock one side and link to each other, No. three interior stock pass through fixed subassembly and outer stock and link to each other.

In foretell recoverable stock of formula of boring certainly, No. two interior stock subassemblies include anchor bar in a plurality of No. two, No. two interior stock tops be equipped with inside sunken and the cross-section is annular thread groove, No. two interior stock bottoms be equipped with the link with a thread groove looks adaptation, a plurality of No. two interior stock through a link and a thread groove spiro union.

In the self-drilling type recoverable anchor rod, the bottom of the third inner anchor rod is provided with a second connecting end matched with the first thread groove, and the third inner anchor rod is in threaded connection with the uppermost second inner anchor rod through the second connecting end and the first thread groove;

the top of the first inner anchor rod is provided with a second thread groove matched with the first connecting end, and the first inner anchor rod is fixedly connected with the second inner anchor rod at the lowest side through the second thread groove and the first connecting end.

In foretell recoverable stock of formula of boring certainly, fixed subassembly including fixed mount pad at outer stock top and embedding to the baffle in the mount pad, baffle top flush with the mount pad, the baffle can dismantle with the mount pad through a plurality of bolts and be connected, No. three interior stock tops flush with outer stock top and No. three interior stock tops and baffle support and lean on, No. three interior stock and outer stock between still be equipped with down limit structure.

In foretell recoverable stock of formula of boring certainly, limit structure include that a plurality of settings are at outer stock top and inwards sunken spacing groove, a plurality of spacing grooves set up along circumference, No. three interior stock tops still be equipped with a plurality of and spacing groove one-to-one's spacing slider, spacing slider insert to the spacing inslot and with spacing groove sliding connection.

In the above self-drilling recoverable anchor rod, the first inner anchor rod, the second inner anchor rod and the third inner anchor rod are all arranged in a hollow manner.

In the self-drilling type recoverable anchor rod, a recovery pull rod which is horizontally arranged is also arranged in the third inner anchor rod.

In the above self-drilling type recoverable anchor rod, the outer anchor rod is formed by combining an upper anchor rod and a lower anchor rod, and the upper anchor rod and the lower anchor rod are connected through a threaded sleeve.

In the self-drilling recoverable anchor rod, the lower anchor rod and the recoverable anchor head are both provided with self-drilling threads, and a plurality of grouting holes are arranged between the self-drilling threads on the lower anchor rod.

Compared with the prior art, the utility model has the advantages that:

1. after the outer anchor rod and the recyclable anchor head are drilled into the rock stratum, the recyclable anchor head can be taken out and recycled from the inside of the hollow outer anchor rod through the recyclable inner anchor rod structure, resource waste is reduced, cost can be effectively reduced, and the transition part on the outer anchor rod is matched with the recyclable anchor head, so that the blocking of the outer anchor rod on drilling can be reduced.

2. Can take out the recoverable anchor head of drilling into the rock stratum and retrieve through anchor rod in first, No. two interior anchor rod subassemblies and No. three interior anchor rods, No. two interior anchor rod subassemblies can suitably increase or reduce the quantity of anchor rod in No. two in order to satisfy the length demand according to outer anchor rod length.

3. The baffle can go on going up spacingly to anchor rod in No. three, and limit structure can go on down spacingly to anchor rod in No. three to can fix recoverable anchor head on outer stock, thereby can be used for removable baffle of bolt take out back in the fixed stop can be through recoverable interior stock structure with recoverable anchor head follow the outside anchor rod inside of cavity setting retrieve and recycle.

4. The spacing groove can carry out down spacing to No. three interior anchor rods through spacing slider to fix recoverable anchor head on outer anchor rod, spacing slider cooperation spacing slider can also carry out circumference spacing to recoverable anchor head, prevents that relative rotation from appearing with outer anchor rod in recoverable anchor head.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a schematic view of a portion of the present invention;

fig. 3 is an enlarged schematic view at B in fig. 1.

Detailed Description

As shown in fig. 1-3, a self-drilling recoverable anchor rod comprises an outer anchor rod 1 which is arranged in a hollow mode, a recoverable anchor head 2 is detachably arranged on the outer anchor rod 1, a recoverable inner anchor rod structure 3 is further arranged between the recoverable anchor head 2 and the outer anchor rod 1, the recoverable anchor head 2 is conical, and a transition portion 4 which is annular in cross section and is obliquely arranged is arranged at the joint of the outer anchor rod 1 and the recoverable anchor head 2.

In this embodiment, after outer stock and recoverable anchor head 2 bored into the stratum in, anchor rod structure 3 takes out recoverable anchor head 2 from the inside recovery of the outer anchor rod of cavity setting for recycling in the recoverable, reduces the waste of resource and can effectively reduce cost, and transition portion 4 on outer stock 1 and recoverable anchor head 2 looks adaptation can reduce the hindrance of outer stock to boring.

As shown in fig. 1-3, recoverable interior stock structure 3 includes interior stock 5, No. two interior stock components 6 and No. three interior stock 7, No. one interior stock 5 both ends link to each other with recoverable anchor head 2 and No. two interior stock components 6 respectively, No. three interior stock 7 and No. two interior stock components 6 keep away from interior stock 5 one side and link to each other, No. three interior stock 7 link to each other with outer stock 1 through fixed subassembly 8. Anchor rod subassembly 6 in No. two includes anchor rod 9 in a plurality of No. two, 9 tops of anchor rod in No. two be equipped with inside sunken and the cross-section is annular thread groove 10, No. two 9 bottoms of anchor rod be equipped with a link 11 of thread groove 10 looks adaptation in, anchor rod 9 can conveniently assemble the dismantlement through a link 11 and a thread groove 10 spiro union in a plurality of No. two, and can reduce the cost of change maintenance when local is impaired. The bottom of the third inner anchor rod 7 is provided with a second connecting end 12 matched with the first thread groove 10, the third inner anchor rod 7 is in threaded connection with the uppermost second inner anchor rod 9 through the second connecting end 12 and the first thread groove 10, so that assembly and disassembly can be conveniently carried out, and the replacement and maintenance cost can be reduced when the part is damaged; the top of the first inner anchor rod 5 is provided with a second thread groove 13 matched with the first connecting end 11, the first inner anchor rod 5 is fixedly connected with the second inner anchor rod 9 on the lowest side through the second thread groove 13 and the first connecting end 11, assembly and disassembly can be conveniently carried out, and the cost of replacement and maintenance can be reduced when the local part is damaged.

Can take out the recoverable anchor head 2 of drilling into the rock stratum and retrieve through anchor rod 5 in No. one, anchor rod subassembly 6 in No. two and anchor rod 7 in No. three, anchor rod subassembly 6 in No. two can suitably increase or reduce the quantity of anchor rod in No. two according to outer anchor rod length in order to satisfy the length demand.

Specifically, as shown in fig. 1-3, the fixing assembly 8 includes a mounting seat 14 fixed to the top of the outer anchor rod 1 and a baffle 15 embedded into the mounting seat 14, the top of the baffle 15 is flush with the mounting seat 14 to avoid affecting the mounting of the mounting seat and a handheld pneumatic drill (not shown in the figure), the baffle 15 is detachably connected to the mounting seat 14 through a plurality of bolts, the top of the No. three inner anchor rod 7 is flush with the top of the outer anchor rod 1, the top of the No. three inner anchor rod 7 abuts against the baffle 15, and a lower limit structure 16 is further arranged between the No. three inner anchor rod 7 and the outer anchor rod 1. The baffle can go on going up spacingly to anchor rod 7 in No. three, and limit structure 16 can go on down spacingly to anchor rod 7 in No. three to can fix recoverable anchor head on outer anchor rod, thereby can be used for anchor rod structure 3 in recoverable anchor head 2 can be recycled from the inside recovery of taking out of the outer anchor rod of cavity setting with detachable baffle after taking out the bolt that fixed stop 15.

Specifically, as shown in fig. 1 to 3, the lower limit structure 16 includes a plurality of limiting grooves 17 disposed at the top of the outer anchor rod 1 and recessed inwards, the plurality of limiting grooves 17 are circumferentially disposed, the top of the third inner anchor rod 7 is further provided with a plurality of limiting sliding blocks 18 corresponding to the limiting grooves 17 one by one, and the limiting sliding blocks 18 are inserted into the limiting grooves 17 and slidably connected with the limiting grooves 17. The limiting groove 17 can be used for limiting the third inner anchor rod through the limiting sliding block 18, so that the recyclable anchor head is fixed on the outer anchor rod, the limiting sliding block 18 is matched with the limiting sliding block 18, the recyclable anchor head can be limited circumferentially, and the recyclable anchor head and the outer anchor rod are prevented from rotating relatively.

Preferably, as shown in fig. 1 to 3, the first inner anchor rod 5, the second inner anchor rod 9 and the third inner anchor rod 7 are all hollow, so that the overall weight of the anchor rod can be reduced and the manufacturing cost can be reduced.

Preferably, as shown in fig. 1-3, a horizontally arranged recovery pull rod 19 is further arranged in the third inner anchor rod 7. The retrieval pull rod 19 can facilitate the retrieval of the retrievable anchor head.

Preferably, as shown in fig. 1 to 3, the outer anchor 1 is formed by combining an upper anchor 20 and a lower anchor 21, and the upper anchor 20 and the lower anchor 21 are connected by a threaded sleeve 22. Self-drilling threads 23 are arranged on the lower anchor rod 21 and the recoverable anchor head 2, and a plurality of grouting holes 24 are arranged between the self-drilling threads 23 on the lower anchor rod 21. The upper anchor rod 20 connected with the lower anchor rod 21 through the thread bushing 22 can be taken out from the rock formation and recycled after use, further reducing the waste of resources, facilitating drilling from the drilling thread 23, and the grouting hole 24 can be used for grouting.

The working principle of the utility model is as follows: after the outer anchor rod and the recyclable anchor head 2 are drilled into the rock stratum, the recyclable anchor head 2 can be taken out from the hollow outer anchor rod for recycling through the recyclable inner anchor rod structure 3, so that the waste of resources is reduced, the cost can be effectively reduced, and the blocking of the outer anchor rod to drilling can be reduced due to the fact that the transition part 4 on the outer anchor rod 1 is matched with the recyclable anchor head 2; the recoverable anchor head 2 drilled into the rock stratum can be taken out and recovered through the first inner anchor rod 5, the second inner anchor rod 6 and the third inner anchor rod 7, the second inner anchor rod 6 can properly increase or decrease the number of the second inner anchor rods according to the length of the outer anchor rods so as to meet the length requirement, the baffle can carry out upper limit on the third inner anchor rod 7, the lower limit structure 16 can carry out lower limit on the third inner anchor rod 7 so as to fix the recoverable anchor head on the outer anchor rods, the baffle can be disassembled after the bolts for fixing the baffle 15 are taken out so as to take out and recover the recoverable anchor head 2 from the inside of the outer anchor rods arranged in the hollow space through the recoverable inner anchor rod structure 3 for recycling, the limit groove 17 can carry out lower limit on the third inner anchor rods through the limit slide block 18 so as to fix the recoverable anchor head on the outer anchor rods, the limit slide block 18 can also carry out circumferential limit on the recoverable anchor head by matching with the limit slide block 18, the recoverable anchor head and the outer anchor rod are prevented from rotating relatively, the upper anchor rod 20 connected with the lower anchor rod 21 through the thread sleeve 22 can be taken out of a rock stratum for recovery after use, resource waste is further reduced, drilling can be facilitated through the self-drilling thread 23, and the grouting hole 24 can be used for grouting.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a from recoverable stock of drilling, includes outer stock (1) that cavity set up, its characterized in that, outer stock (1) on detachable be equipped with recoverable anchor head (2), recoverable anchor head (2) and outer stock (1) between still be equipped with recoverable interior stock structure (3), recoverable anchor head (2) be conical, the junction of outer stock (1) and recoverable anchor head (2) be equipped with transition portion (4) that the cross-section is the annular and slope setting.

2. A self-drilling recoverable anchor rod according to claim 1, wherein the recoverable inner anchor rod structure (3) comprises a first inner anchor rod (5), a second inner anchor rod assembly (6) and a third inner anchor rod (7), both ends of the first inner anchor rod (5) are respectively connected with the recoverable anchor head (2) and the second inner anchor rod assembly (6), the third inner anchor rod (7) and the second inner anchor rod assembly (6) are connected on the side away from the first inner anchor rod (5), and the third inner anchor rod (7) is connected with the outer anchor rod (1) through a fixing assembly (8).

3. A self-drilling recoverable anchor rod according to claim 2, wherein the second inner anchor rod assembly (6) comprises a plurality of second inner anchor rods (9), the top of each second inner anchor rod (9) is provided with a first thread groove (10) which is concave inwards and has an annular cross section, the bottom of each second inner anchor rod (9) is provided with a first connecting end (11) matched with the first thread groove (10), and the second inner anchor rods (9) are in threaded connection with the first thread groove (10) through the first connecting ends (11).

4. A self-drilling recoverable anchor rod according to claim 3, wherein the bottom of the third inner anchor rod (7) is provided with a second connecting end (12) matched with the first thread groove (10), and the third inner anchor rod (7) is in threaded connection with the uppermost second inner anchor rod (9) through the second connecting end (12) and the first thread groove (10);

the top of the first inner anchor rod (5) is provided with a second thread groove (13) matched with the first connecting end (11), and the first inner anchor rod (5) is fixedly connected with the second inner anchor rod (9) at the lowest side through the second thread groove (13) and the first connecting end (11).

5. A self-drilling recoverable bolt according to claim 2, 3 or 4, wherein the fixing assembly (8) comprises a mounting seat (14) fixed to the top of the outer bolt (1) and a baffle (15) embedded into the mounting seat (14), the top of the baffle (15) is flush with the mounting seat (14), the baffle (15) is detachably connected with the mounting seat (14) through a plurality of bolts, the top of the third inner bolt (7) is flush with the top of the outer bolt (1), the top of the third inner bolt (7) abuts against the baffle (15), and a lower limiting structure (16) is arranged between the third inner bolt (7) and the outer bolt (1).

6. A self-drilling recoverable bolt according to claim 5, wherein the lower limiting structure (16) comprises a plurality of limiting grooves (17) which are arranged at the top of the outer bolt (1) and are recessed inwards, the plurality of limiting grooves (17) are arranged along the circumferential direction, a plurality of limiting sliding blocks (18) which correspond to the limiting grooves (17) in a one-to-one mode are further arranged at the top of the third inner bolt (7), and the limiting sliding blocks (18) are inserted into the limiting grooves (17) and are connected with the limiting grooves (17) in a sliding mode.

7. A self drilling retrievable rock bolt according to claim 3 or 4, wherein the first inner bolt (5), the second inner bolt (9) and the third inner bolt (7) are hollow.

8. A self drilling retrievable rock bolt according to claim 2, 3 or 4, characterised in that a horizontally disposed retrieval tie rod (19) is provided in the third inner rock bolt (7).

9. A self drilling retrievable rock bolt according to claim 1, 2, 3 or 4, wherein the outer rock bolt (1) is formed by a combination of an upper rock bolt (20) and a lower rock bolt (21), the upper rock bolt (20) and the lower rock bolt (21) being connected by a threaded sleeve (22).

10. A self drilling retrievable rock bolt according to claim 9, wherein the lower rock bolt (21) and the retrievable anchor head (2) are provided with self drilling screw threads (23) and a plurality of grouting holes (24) are provided between the self drilling screw threads (23) on the lower rock bolt (21).