CN218376532U - Cold-drawing extrusion thread fastening type hollow grouting anchor cable - Google Patents
Cold-drawing extrusion thread fastening type hollow grouting anchor cable Download PDFInfo
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- CN218376532U CN218376532U CN202222723758.0U CN202222723758U CN218376532U CN 218376532 U CN218376532 U CN 218376532U CN 202222723758 U CN202222723758 U CN 202222723758U CN 218376532 U CN218376532 U CN 218376532U
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Abstract
The utility model discloses a cold-drawing extrusion thread fastening type hollow grouting anchor cable, belonging to the technical field of mine anchor cables; the hollow special steel strand braided by the anchor head, the slurry guide pipe and the steel wire, a support sleeve, a support frame, a cold-drawing extrusion threaded sleeve, a slurry stop plug, a tray, a nut, a slurry guide pipe protective sleeve and the like, wherein a plurality of stranded hollow steel strands are fixed on the anchor head at the front end, the inner side of each steel strand is a whole copper pipe, a slurry outlet is formed in the steel strand 2 meters away from the front end, the support sleeve is arranged at the slurry outlet, a gap is reserved between the steel strands to ensure slurry to flow out, the slurry stop plug and the tray are arranged on the outer side of each hollow steel strand, the rear end of each hollow steel strand is fastened through the cold-drawing extrusion threaded sleeve, and the nut matched with the cold-drawing extrusion threaded sleeve is arranged outside the cold-drawing extrusion threaded sleeve. The utility model discloses the slip casting pipe adopts full length copper pipe, and row's thick liquid mouth department is equipped with the support frame and makes and produce the clearance between the steel strand wires, guarantees the thick liquid and discharges. The problems that the PVC pipe is broken under pressure and the grouting effect is not ideal are avoided.
Description
Technical Field
The utility model relates to mining anchor rope technical field, in particular to cold drawing extrusion screw fastening formula cavity slip casting anchor rope.
Background
The coal face, generally use tunnel support or monomer to strut advance support, the tunnel support appears and is difficult for withdrawing, problem such as workman intensity of labour is big, danger coefficient height, and current anchor rope realizes the supporting effect at anchor rope, ground tackle, anchoring agent, tray etc. and hardly reaches the effect of strutting when running into damaged country rock, and the installation slip casting pipe that punches again during traditional anchor rope slip casting wastes time, difficultly.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a cold-drawing extrusion thread fastening type hollow grouting anchor cable; the special joint for the exhaust port and the grouting pipe is omitted, and the grouting pipe, the exhaust pipe and the plugging grouting hole do not need to be bound on site, so that the construction process is greatly simplified.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
a cold-drawing extrusion thread fastening type hollow grouting anchor cable comprises an anchor cable, an anchor head and a slurry guide pipe; the cold-drawing extrusion screw thread sleeve, the grout stopping plug, the tray and the nut are also included;
the anchor cable comprises steel strands, and a plurality of steel strands are woven on the outer surface of the slurry guide pipe; the slurry outlet of the slurry guide pipe is arranged on the side wall of the slurry guide pipe, and the steel strand tightly attached to the slurry outlet is opened through the anchor cable; the anchor head is fixed at the head of the anchor cable;
the outer side of the tail part of the anchor cable is sleeved with a cold-drawing extrusion threaded sleeve, and the central shaft of the cold-drawing extrusion threaded sleeve is superposed with the central shaft of the slurry guide pipe; the outer surface of the cold-drawing extrusion threaded sleeve is provided with external threads, and the nut, the tray and the grout stopping plug are sequentially in threaded connection with the fastening sleeve along the grouting direction;
the outer wall of the nut is provided with a pin hole perpendicular to the central axis of the nut; the outer wall of the fastening sleeve is provided with small holes corresponding to the pin holes; and pins are arranged in the pin holes.
Furthermore, the slurry guide pipe is a copper pipe.
The cable fixing device further comprises a support frame, wherein the support frame is of a rigid annular structure and is sleeved between the copper pipe and the anchor cable.
Furthermore, the support frame is equipped with a plurality ofly, and a plurality of support frames are along the extending direction of mud guide pipe equidistant distribution.
Further, the anchor head is a steel anchor head.
Furthermore, the inner surface of the cold-drawing extrusion thread bushing is provided with inverted teeth for preventing the cold-drawing extrusion thread bushing and the steel strand from sliding.
Further, a projection facing the nut is arranged at the middle position of the tray; wherein, the grout stopping plug is positioned in the groove of the tray forming bulge.
The utility model adopts the beneficial effect that above-mentioned technical scheme produced lies in:
1) The utility model discloses can realize anchor rope, slip casting pipe and once install and accomplish, fine combine anchor rope, country rock, slip casting liquid together, reach the best effect of strutting, cavity slip casting anchor rope replaces traditional advance support, has saved gas vent and slip casting pipe special joint, also need not on-the-spot ligature slip casting pipe, blast pipe and shutoff slip casting hole, makes the construction process very simplify.
2) The utility model discloses can realize prestressing force, realize anchor rope full length anchor after the slip casting is accomplished, improve the supporting performance of anchor rope greatly.
3) The slurry guide pipe adopts a full-length copper pipe, and a support frame is arranged at the slurry discharge port to ensure that a gap is formed between the steel strands, so that the liquid is discharged. The problems that the PVC pipe is broken under pressure and the grouting effect is not ideal are avoided.
4) The cold-drawing extrusion thread fastening type hollow grouting anchor cable fastening sleeve is provided with a high-strength wear-increasing jacket with inner inverted teeth, and can effectively prevent the fastening sleeve and a steel strand from sliding.
5) A plurality of fancy support frames are adopted in the anchor cable, so that the deformation of the grouting pipe is effectively avoided, and the smoothness of the grouting pipe is ensured.
6) The utility model rotates the nut after the pin in the nut pin hole enters the fastening sleeve small hole, and forces the anchor cable to rotate along with the nut, and the anchoring agent is stirred; after the anchoring agent is solidified, the nut is rotated, the pin penetrating through the pin hole and the pin penetrating through the small hole are cut off through the fastening sleeve, the anchor cable is tensioned outwards, and pre-tightening force can be applied to the anchor cable. On-site no need of tensioning machine, and can implement stirring and fastening at one time, so that its construction process can be greatly simplified.
Drawings
Fig. 1 is a schematic structural section view of an embodiment of the present invention.
In the figure: 1. the anchor head, the slurry guide pipe, the anchor cable, the support sleeve, the support frame, the cold-drawing extrusion threaded sleeve, the slurry stop plug, the tray, the nut and the slurry guide pipe sheath are sequentially arranged from top to bottom, wherein the slurry guide pipe sheath comprises an anchor head, a slurry guide pipe, a support cable, a support sleeve, a support frame, a cold-drawing extrusion threaded sleeve, a slurry stop plug, a tray, a nut and a slurry guide pipe sheath.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
A cold-drawing extrusion thread fastening type hollow grouting anchor cable comprises an anchor cable 3, an anchor head 1 and a slurry guide pipe 2; the cold-drawing extrusion screw thread sleeve 6, the grout stopping plug 7, the tray 8 and the nut 9 are also included;
the anchor cable 3 comprises steel strands, and a plurality of steel strands are woven on the outer surface of the slurry guide pipe 2; the slurry outlet of the slurry guide pipe 2 is arranged on the side wall of the slurry guide pipe, and the steel strand tightly attached to the slurry outlet is opened through the support sleeve 4; the anchor head 1 is fixed at the head of the anchor cable 3;
a cold-drawing extrusion threaded sleeve 6 is sleeved on the outer side of the tail part of the anchor cable 3, and the central shaft of the cold-drawing extrusion threaded sleeve 6 is superposed with the central shaft of the slurry guide pipe 2; the outer surface of the cold-drawing extrusion threaded sleeve 6 is provided with external threads, and the nut 9, the tray 8 and the grout stop plug 7 are sequentially in threaded connection with the cold-drawing extrusion threaded sleeve 6 along the grouting direction;
the outer wall of the nut 9 is provided with a pin hole perpendicular to the central axis of the nut 9; the outer wall of the cold-drawing extrusion threaded sleeve 6 is provided with small holes corresponding to the pin holes; a pin is arranged in the pin hole; the slurry guide pipe 2 is a copper pipe, and is not connected in the whole length, so that the condition that the slurry guide pipe 2 is broken from the connection part to influence the grouting effect under larger grouting pressure can be avoided; the supporting sleeve 4 is of a rigid annular structure and is sleeved between the slurry guide pipe 2 and the anchor cable 3, and a gap can be formed at the slurry discharge port of the steel strand so as to discharge slurry; the plurality of support frames 5 are arranged, and the plurality of support frames 5 are distributed at equal intervals along the extension direction of the bobbin, so that the copper pipe is prevented from being deformed or blocked and slurry is prevented from flowing out smoothly or cannot flow out due to the fact that the steel strand extrudes the copper pipe in the weaving process; the anchor head 1 is a steel anchor head, and edges and corners are arranged on the anchor head 1, so that the anchor cable 3 can conveniently cut the anchoring bag when rotating, and the anchoring agent can smoothly flow out; the inner surface of the cold-drawing extrusion threaded sleeve 6 is provided with inverted teeth for preventing the cold-drawing extrusion threaded sleeve 6 and the steel strand from sliding, and the coupling force of the cold-drawing extrusion threaded sleeve 6 is ensured to be larger than the ultimate tensile force of the steel strand through a tensile test; the tray 8 has a projection towards the nut 9 at an intermediate position; wherein, the grout stop plug 7 is positioned in the groove of the bracket forming bulge, which can obviously improve the bearing capacity of the tray 8.
The following is a more specific example:
referring to fig. 1, the present embodiment includes: the anchor comprises an anchor head 1, a slurry guide pipe 2, an anchor rope 3, a support sleeve 4 of a slurry discharge port, a support frame 5, a cold-drawing extrusion threaded sleeve 6, a slurry stop plug 7, a tray 8, a nut 9, a slurry guide pipe sheath 10 and the like, wherein a plurality of stranded hollow steel stranded wires forming the anchor rope 3 are fixed on the anchor head 1 at the front end, the inner side of each steel stranded wire is a whole copper pipe, the steel stranded wire is provided with a slurry outlet 2 meters away from the front end, the end part of the copper pipe at the slurry outlet is provided with the support sleeve 4, a gap is reserved between the steel stranded wires to ensure slurry to flow out, the slurry stop plug 7 and the tray 8 are arranged on the outer side of each hollow steel stranded wire, the cold-drawing extrusion threaded sleeve 6 is sleeved at the rear end of the hollow steel stranded wire, a nut 9 matched with the cold-drawing extrusion threaded sleeve 6 is arranged outside the cold-drawing extrusion threaded sleeve 6, transverse through holes are formed in the cold-drawing extrusion threaded sleeve 6 and the nut 9, and a torque control pin is arranged in the through holes; the slurry guide pipe sheath 10 is arranged at the tail end of the slurry guide pipe 2, and is prevented from being collided in the transportation and construction process, and impurities are prevented from entering the slurry guide pipe 2. The utility model discloses need not set up special stretch-draw equipment, stirring, fastening are once accomplished, the utility model discloses the slip casting pipe adopts full length copper pipe, and row's thick liquid mouth department is equipped with and supports the cover and make and produce the clearance between the steel strand wires, guarantees the thick liquid and discharges. The problems that the PVC pipe is broken due to pressure and the grouting effect is not ideal are avoided.
The construction process comprises the following steps:
the main procedures are as follows: ground preparation, drilling, anchoring of an anchoring section, tensioning and sealing holes and grouting.
(1) Preparing the ground: the hollow grouting anchor cable is required to be lightly taken and lightly placed in the conveying process so as to avoid damaging the hollow grouting anchor cable and influencing grouting, and the hollow grouting anchor cable is required to be kept clean so as to avoid the hollow grouting anchor cable from being stained with mud, coal powder, oil and water to influence the bonding effect of the hollow grouting anchor cable, an anchoring agent and grouting liquid.
(2) Drilling: the drilling hole adopts an anchor rod drilling machine, a rotary drill bit with the diameter of 32mm is selected for connecting a B19 drill rod, and the drilling machine is kept fixed during drilling so as to avoid the problem that the axes of the drilling holes are not on the same straight line and the difficulty is brought to the installation of the hollow grouting anchor cable.
(3) Anchoring: sending the resin anchoring agent into the hole, sending the resin anchoring agent into the hole bottom by using the hollow grouting anchor cable gently, installing a grout stop plug 7 and a tray 8, screwing a nut 9 onto a cold-drawing extrusion threaded sleeve 6, aligning the pin hole on the nut 9 with the axis of the small hole on the cold-drawing extrusion threaded sleeve 6, installing a torque control pin, rotating the nut 9, enabling an anchor cable 3 to rotate along with the nut 9 through the cold-drawing extrusion threaded sleeve 6, stirring for 20 seconds to 30s, sending the hollow grouting anchor cable into the hole bottom, stopping rotating, and finishing the anchoring of the anchoring agent of the hollow grouting anchor cable.
(4) And (3) expanding and pulling: the resin anchoring agent needs to be maintained for 1 hour, after maintenance is completed, the head of the hollow grouting anchor cable is anchored by the anchoring agent, the anchor cable 3 cannot rotate along with the nut 9, the nut 9 is rotated by a wrench at the moment, the torque control pin transversely arranged in the through hole of the nut 9 can be cut off by cold-drawing extrusion thread sleeves 6, the hollow grouting anchor cable is tensioned outwards, pretightening force is applied to the hollow grouting anchor cable, after the grout stop plug 7 is completely pressed into a drilled hole, the nut 9 is stopped to be screwed, hole sealing conditions are checked, if the hole sealing conditions are met, the nut 9 is continuously screwed by a torque wrench until the design requirements are met.
(5) Grouting: the slurry is made of a polyurethane material for reinforcing coal and rock mass in a coal mine, wherein the ratio of the material A to the material B is 1. Firstly, a pneumatic grouting pump is well connected with a hollow grouting anchor cable by a pipeline, and grouting can be started after the grouting pipeline is intact and reliable in connection. And after the grouting pressure reaches the design requirement, firstly closing the grouting pump, then closing the stop valve at the tail part of the hollow grouting anchor cable, and opening the pipeline pressure relief valve to relieve the pressure of the pipeline. In the grouting process, when local slurry leakage and leakage are found, cotton yarns are used for plugging in time.
Claims (7)
1. A cold-drawing extrusion thread fastening type hollow grouting anchor cable comprises an anchor cable (3), an anchor head (1) and a slurry guide pipe (2); the device is characterized by also comprising a cold-drawing extrusion threaded sleeve (6), a grout stopping plug (7), a tray (8) and a nut (9);
the anchor cable (3) comprises steel strands, and a plurality of steel strands are woven on the outer surface of the slurry guide pipe (2); a slurry outlet of the slurry guide pipe (2) is formed in the side wall of the slurry guide pipe, and a steel strand tightly attached to the slurry outlet is opened through an anchor cable (3); the anchor head (1) is fixed at the head part of the anchor cable (3);
a cold-drawing extrusion threaded sleeve (6) is sleeved on the outer side of the tail part of the anchor cable (3), and the central axis of the cold-drawing extrusion threaded sleeve (6) is superposed with the central axis of the slurry guide pipe (2); the outer surface of the cold-drawing extrusion threaded sleeve (6) is provided with external threads, and the nut (9), the tray (8) and the grout stopping plug (7) are sequentially in threaded connection with the fastening sleeve along the grouting direction;
the outer wall of the nut (9) is provided with a pin hole vertical to the central axis of the nut (9); the outer wall of the fastening sleeve is provided with small holes corresponding to the pin holes; and pins are arranged in the pin holes.
2. The cold-drawn extrusion thread-fastened hollow grouting anchor cable as claimed in claim 1, wherein the slurry guide pipe (2) is a copper pipe.
3. The cold-drawing extrusion thread fastening type hollow grouting anchor cable as claimed in claim 2, further comprising a support frame (5), wherein the support frame (5) is of a rigid annular structure and is sleeved between the copper pipe and the anchor cable (3).
4. The cold-drawing extrusion thread fastening type hollow grouting anchor cable as claimed in claim 3, wherein the number of the support frames (5) is multiple, and the multiple support frames (5) are distributed at equal intervals along the extension direction of the grout guide pipe (2).
5. A cold drawn extruded screw fastened hollow grouting anchor cable according to claim 1, characterised in that the anchor head (1) is a steel anchor head.
6. A cold-drawn extruded screw-fastened hollow grouting anchor cable according to claim 1, characterised in that the inner surface of the cold-drawn extruded threaded sleeve (6) is provided with inverted teeth for preventing the cold-drawn extruded threaded sleeve (6) from slipping with the steel strand.
7. A cold drawn extruded screw fastened hollow grouting anchor cable according to claim 1, characterised in that the tray (8) has a projection towards the nut (9) in the middle; wherein, the grout stop plug (7) is positioned in a groove which is formed by a bulge on the tray (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222723758.0U CN218376532U (en) | 2022-10-17 | 2022-10-17 | Cold-drawing extrusion thread fastening type hollow grouting anchor cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222723758.0U CN218376532U (en) | 2022-10-17 | 2022-10-17 | Cold-drawing extrusion thread fastening type hollow grouting anchor cable |
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| Publication Number | Publication Date |
|---|---|
| CN218376532U true CN218376532U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222723758.0U Active CN218376532U (en) | 2022-10-17 | 2022-10-17 | Cold-drawing extrusion thread fastening type hollow grouting anchor cable |
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| Country | Link |
|---|---|
| CN (1) | CN218376532U (en) |
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- 2022-10-17 CN CN202222723758.0U patent/CN218376532U/en active Active
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