CN219220466U - Hollow grouting anchor rod - Google Patents
Hollow grouting anchor rod Download PDFInfo
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- CN219220466U CN219220466U CN202320314575.5U CN202320314575U CN219220466U CN 219220466 U CN219220466 U CN 219220466U CN 202320314575 U CN202320314575 U CN 202320314575U CN 219220466 U CN219220466 U CN 219220466U
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- anchor rod
- main body
- rod main
- expansion steel
- anchor
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Abstract
The utility model discloses a hollow grouting anchor rod, which relates to the technical field of coal mining roadway support and comprises an anchor rod main body, wherein a check valve is arranged at the top end thread of the anchor rod main body, two spherical protrusions are arranged on the outer surface of the anchor rod main body, two mounting rings are sleeved on the outer side of the anchor rod main body, four expansion steel sheets are fixedly arranged at the top of each mounting ring at equal intervals in circumference, and a connecting ring is fixedly arranged between the four expansion steel sheets at the top of each mounting ring. According to the utility model, after the anchor rod main body is inserted into the hole, the spherical protrusion enters the extrusion sleeve by rotating the anchor rod main body, the extrusion sleeve is separated and drives the connecting ring and the expansion steel sheet to deform, the connecting ring plays a role of continuously supporting the expansion steel sheet, and the expansion steel sheet tightly abuts against the inner wall of the hole, so that surrounding rocks on the inner wall of the hole are restrained rapidly, stress arches are formed on the surrounding rocks, and deformation of the surrounding rocks is controlled timely.
Description
Technical Field
The utility model relates to the technical field of coal mining roadway support, in particular to a hollow grouting anchor rod.
Background
At present, the mining depth of coal mines in China is larger and larger, rock burst is obvious, rock mass is seriously crushed, geological crushing zones are more and more encountered, roadway anchor bolt support is more and more difficult, and along with the further increase of the mining depth of coal mines, higher requirements are put forward on the support strength of roadway support arm sections and anchor bolts.
After the existing grouting anchor rods are inserted into holes drilled in a roadway, the grouting anchor rods need to be solidified to a certain strength to generate an anchoring effect, surrounding rocks on the inner wall of the hole cannot be restrained rapidly, and the surrounding rocks on the periphery of the hole can be easily caused to lose supporting effect if deformed before the grouting anchor rods are solidified.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a hollow grouting anchor rod.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the hollow grouting anchor rod comprises an anchor rod main body, wherein a check valve is arranged at the top end of the anchor rod main body in a threaded manner, two spherical protrusions are arranged on the outer surface of the anchor rod main body, two mounting rings are sleeved on the outer side of the anchor rod main body, four expansion steel sheets are fixedly arranged at the top of each mounting ring at equal intervals in circumference, and a connecting ring is fixedly arranged between the four expansion steel sheets at the top of each mounting ring;
the inside of four expansion steel sheets at the top of each mounting ring is provided with an extrusion sleeve, and two extrusion sleeves are sleeved on the outer surface of the anchor rod main body.
Further, a backing plate is sleeved above the outer surface of the anchor rod main body, a nut is installed above the outer surface of the anchor rod main body through threads, and the nut is located at the top of the backing plate.
Further, the outer surface of the anchor body is provided with threads.
Further, a notch for expansion is formed in one side of the connecting ring.
Further, the inner diameters of the two extrusion sleeves are gradually reduced from bottom to top, and through grooves for separation are formed in two sides of the two extrusion sleeves.
Further, a plurality of inclined check plates are fixedly arranged on one sides, far away from the anchor rod main body, of the eight expansion steel sheets.
Compared with the prior art, the utility model has the beneficial effects that:
1. after the anchor rod main body is inserted into the hole, the anchor rod main body is rotated, the spherical bulge enters the extrusion sleeve, the extrusion sleeve is separated and drives the connecting ring and the expansion steel sheet to deform, the connecting ring plays a role of continuously supporting the expansion steel sheet, the expansion steel sheet tightly abuts against the inner wall of the hole, surrounding rocks on the inner wall of the hole are restrained rapidly, the surrounding rocks form a stress arch, and deformation of the surrounding rocks is controlled timely.
2. When grouting is carried out, the grouting anchor rod is required to be screwed into the hole, the hole is blocked by the base plate, the base plate is fixed through the nut, and finally, grouting operation can be carried out inside the hole after the grouting pipe is connected with the check valve, the check valve can play a role in grouting check, and slurry backflow inside the anchor rod main body is avoided.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;
fig. 3 is a schematic view of a partial structure of the present utility model.
In the figure: 1. an anchor body; 2. a backing plate; 3. a check valve; 4. a nut; 5. extruding the sleeve; 6. spherical protrusions; 7. expanding the steel sheet; 8. a connecting ring; 9. a mounting ring; 10. and a check plate.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model;
referring to fig. 1-3, a hollow grouting anchor comprises an anchor body 1, wherein threads are arranged on the outer surface of the anchor body 1, two spherical protrusions 6 are arranged on the outer surface of the anchor body 1, two mounting rings 9 are sleeved on the outer side of the anchor body 1, the two mounting rings 9 are respectively above the two spherical protrusions 6, four expansion steel sheets 7 are fixedly arranged at the top of each mounting ring 9 at equal intervals in circumference, and a connecting ring 8 is fixedly arranged between the four expansion steel sheets 7 at the top of each mounting ring 9; the extrusion cover 5 is all installed to the inside of four expansion steel sheets 7 at every collar 9 top, and two extrusion covers 5 all overlap and establish the surface at stock main part 1, and the equal fixed mounting of one side that eight expansion steel sheets 7 kept away from stock main part 1 has a plurality of inclined check boards 10, and the internal diameter of two extrusion covers 5 is from bottom to top dwindle gradually, and the logical groove that is used for the separation is all offered to the both sides of two extrusion covers 5, and one side of go-between 8 is provided with the opening that is used for the expansion.
When grouting is needed after drilling holes in the roadway, the anchor rod main body 1 can be inserted into the holes, and after the anchor rod main body 1 is inserted, the check plate 10 is in contact with the inner walls of the holes, so that the expansion steel sheet 7 and the extrusion sleeve 5 are difficult to move outwards;
after that, the worker rotates the anchor rod main body 1, so that the spherical bulge 6 moves backwards, the spherical bulge 6 enters the extrusion sleeve 5, the extrusion sleeve 5 is separated and drives the connecting ring 8 and the expansion steel sheet 7 to deform, the connecting ring 8 plays a role in continuously supporting the expansion steel sheet 7, and the expansion steel sheet 7 tightly abuts against the inner wall of the hole, so that surrounding rocks of the inner wall of the hole are restrained rapidly, stress arches are formed by the surrounding rocks, and deformation of the surrounding rocks is controlled timely.
The top thread of the anchor rod main body 1 is provided with a check valve 3, a backing plate 2 is sleeved above the outer surface of the anchor rod main body 1, the upper thread of the outer surface of the anchor rod main body 1 is provided with a nut 4, and the nut 4 is positioned at the top of the backing plate 2;
when grouting, the grouting anchor rod 1 is required to be screwed into the hole, the hole is sealed by the base plate 2, the base plate 2 is fixed through the nut 4, and finally grouting operation can be performed inside the hole after the grouting pipe is connected with the check valve 3, the grouting check effect can be achieved through the check valve 3, and slurry backflow inside the anchor rod body 1 is avoided.
Claims (6)
1. The utility model provides a cavity slip casting stock, includes stock main part (1), its characterized in that, check valve (3) are installed to the top screw thread of stock main part (1), the surface of stock main part (1) is provided with two spherical protruding (6), the outside cover of stock main part (1) is equipped with two collar (9), two the equal equidistant circumference in top of collar (9) is all fixed mounting has four expansion steel sheet (7), every four at collar (9) top between expansion steel sheet (7) all fixed mounting go-between (8);
the inside of four expansion steel sheets (7) at the top of each installation ring (9) is provided with an extrusion sleeve (5), and two extrusion sleeves (5) are sleeved on the outer surface of the anchor rod main body (1).
2. A hollow grouting anchor as claimed in claim 1, characterised in that a backing plate (2) is sleeved over the outer surface of the anchor body (1), a nut (4) is mounted on the upper thread of the outer surface of the anchor body (1), and the nut (4) is located at the top of the backing plate (2).
3. A hollow grouting bolt as claimed in claim 1, characterised in that the outer surface of the bolt body (1) is provided with screw threads.
4. A hollow grouting bolt as claimed in claim 1, characterised in that one side of the connecting ring (8) is provided with a slit for expansion.
5. A hollow grouting anchor as claimed in claim 1, characterised in that the inner diameters of the two extrusion sleeves (5) are gradually reduced from bottom to top, and the two sides of the two extrusion sleeves (5) are provided with through grooves for separation.
6. A hollow grouting bolt as claimed in claim 1, characterised in that a plurality of inclined check plates (10) are fixedly mounted to the side of the eight expansion steel discs (7) remote from the bolt body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320314575.5U CN219220466U (en) | 2023-02-24 | 2023-02-24 | Hollow grouting anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320314575.5U CN219220466U (en) | 2023-02-24 | 2023-02-24 | Hollow grouting anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219220466U true CN219220466U (en) | 2023-06-20 |
Family
ID=86754124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320314575.5U Active CN219220466U (en) | 2023-02-24 | 2023-02-24 | Hollow grouting anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219220466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365597A (en) * | 2023-11-22 | 2024-01-09 | 山东焱鑫矿用材料加工有限公司 | Anti-breakage fine tooth anchor rod with rapid linkage combined assembly structure and use method |
-
2023
- 2023-02-24 CN CN202320314575.5U patent/CN219220466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365597A (en) * | 2023-11-22 | 2024-01-09 | 山东焱鑫矿用材料加工有限公司 | Anti-breakage fine tooth anchor rod with rapid linkage combined assembly structure and use method |
| CN117365597B (en) * | 2023-11-22 | 2024-04-19 | 潍坊瑞利技术有限公司 | Anti-breakage fine tooth anchor rod with rapid linkage combined assembly structure and use method |
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