CN202273695U - Hot roll fine thread steel anchor rod - Google Patents
Hot roll fine thread steel anchor rod Download PDFInfo
- Publication number
- CN202273695U CN202273695U CN2011203926102U CN201120392610U CN202273695U CN 202273695 U CN202273695 U CN 202273695U CN 2011203926102 U CN2011203926102 U CN 2011203926102U CN 201120392610 U CN201120392610 U CN 201120392610U CN 202273695 U CN202273695 U CN 202273695U
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- China
- Prior art keywords
- rod
- anchor rod
- anchor
- fine thread
- thread steel
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Abstract
The utility model discloses a hot roll fine thread steel anchor rod, which has the characteristics of small thread pitch, small thread lead angle and high thread height, is matched with a clamp nut and reliably anchored with the end part of the clamp nut, and solves the problems that the end part of the anchor rod is difficult to connect and anchor. The utility model overcomes the defects that the product performance is reduce, the product is easily subject to brittle fracture, the threaded section is short and the processing cost is high during the secondary cold working, has the advantages that the anchor rod is tightly matched with a fastener and has excellent self-locking performance, and can effectively avoid resource waste and save steel consumption.
Description
Technical field
The utility model relates to the bolt support technology in construction work, rock mass engineering project field, is specifically related to a kind of hot rolling fine thread steel formula anchor pole.
Background technology
In order to guarantee that rock mass engineering project excavates smoothly, need take the ground anchorage technology that the country rock in mine, tunnel is carried out supporting, anchoring can improve self intensity and self-stable ability of geotechnical body, effectively controls the geotechnical engineering distortion.Bolt support in the anchoring has the effect of initiatively reinforcing country rock; Bolt support is the mechanical state that the inner body of rod of utilization country rock changes country rock itself; Improve the intensity of country rock; Reach complete and stable relatively carrying figure of formation in the surrounding rock body of tunnel with this, tunnel safety is safeguarded in this carrying figure and country rock acting in conjunction.Therefore, often utilize anchor pole that the mine laneway country rock is imposed anchoring in the engineering, use indented bars and rock mass fixed, fixedly reinforcing bar is terminal with nut, anchor dish etc., and rock mass is provided support and retrains, and prevents that rock mass from caving in.
The indented bars that is used for bolt support at present has strong wide indented barss such as hot rolling and end through wide indented bars of the cold worked hot rolling of secondary etc., and all there is defective in they.For strong wide indented barss such as hot rollings, because the rib spacing of its screw thread is wide and profile is coarse, pretightning force is little, and self-locking performance is poor, if surrounding rock body frequently shakes the application of force, clamp structure is very easily loosening, even splits away off from reinforcing bar, causes anchoring to be lost efficacy.Through the wide indented bars of the cold worked hot rolling of secondary, circle, rolled thread are rolled through secondary mechanical cold working in its end for the end, and the body of rod is prone to brittle failure when the rock mass application of force is excessive, causes the anchored force pop-off, the rock mass avalanche, and its cost is higher.
Summary of the invention
In view of this, the utility model provides a kind of hot rolling fine thread steel formula anchor pole, can improve the pretightning force of anchor pole, and meet to impact and to be difficult for brittle failure, and anchoring effect is reliable.
The hot rolling fine thread steel formula anchor pole of the utility model comprises the body of rod, anchor dish and nut; Wherein the body of rod is by the billet rolling moulding, and the cross rib on the body of rod forms helix on same helicoid, and pitch is 4 ± 2mm; Lead angle is not more than 6 °, the tooth height of screw thread between 1.0mm between the 1.7mm.
Beneficial effect:
The anchor rod body flight pitch of the utility model is little, and lead angle is little, and Ya Gaogao is little with the clamp nut fit clearance, and its reliable screw thread self-locking property has avoided clamp nut to come off, and has improved safety.Because the cross rib on the body of rod forms helix on same helicoid, when country rock generation wall caving comes off, when anchoring was lost efficacy, secure component can follow up continuously, and was fastening again, need not the secondary anchoring, greatly practiced thrift steel, reduced engineering cost.
Description of drawings
Fig. 1 is the anchor rod body three-dimensional effect diagram.
Fig. 2 is the helicitic texture sketch map of anchor rod body.
Fig. 3 is the longitudinal section sketch map of anchor rod body.
Fig. 4 is anchor rod body and anchor dish and the supporting use sketch map of nut.
The specific embodiment
The anchor pole of the utility model mainly comprises the body of rod, anchor dish and nut.
Fig. 1 shows the structure of anchor rod body, and the body of rod is a hot rolling one-shot forming screw-thread steel, by the billet rolling moulding; Cross rib on the body of rod forms helix on same helicoid, body of rod neat appearance, and pitch L is 4 ± 2mm (as shown in Figure 2); Lead angle is not more than 6 °; To (as shown in Figure 3) between the 1.7mm, can choose according to instructions for use by body of rod nominal diameter between 1.0mm for the high H of the tooth of screw thread, for example 16mm, 18mm, 20mm, 22mm or the like.
The model of anchor dish and nut and the nominal diameter of the body of rod and screw thread cross rib spacing, rib height are complementary, the supporting use of three.
Fig. 4 is the body of rod and anchor dish, the matching used sketch map of nut.During use,, need to confirm the position of skyhook, punch in this position with the rig tool according to the roadway surrounding rock condition; Pressing wind that rock dust in the hole is blown off, the anchoring agent sent into the hole at the bottom of, withstand the anchoring agent with anchor rod body one end; Squeeze into country rock inside, use the stirring facility and carry out anchoring agent stirring, according to the time of anchoring agent model stirring needs; Make the body of rod and country rock fixed for one, unload afterwards and stir facility and wait for official hour, install the anchor dish additional and nut gets final product at body of rod exposed parts then.
Except that anchor dish and nut, can with the supporting use anchorage element of the body of rod also comprise ball-type packing ring, friction washer, damping plug etc., can further increase the pretightning force of anchor pole, improve anchoring property.
The length of the body of rod is determined that by wall rock condition continuous and fine and closely woven because of body of rod total length screw thread, the self-locking property of anchor pole is greatly enhanced, and anchor dish and the nut position on anchor pole can be decided according to wall rock condition, and is easy to use.
Claims (2)
1. hot rolling fine thread steel formula anchor pole; It is characterized in that comprise the body of rod, anchor dish and nut, wherein the body of rod is by the billet rolling moulding; Cross rib on the body of rod forms helix on same helicoid; And pitch is 4 ± 2mm, and lead angle is not more than 6 °, the tooth height of screw thread between 1.0mm between the 1.7mm.
2. anchor pole as claimed in claim 1 is characterized in that, further comprises ball-type packing ring, friction washer and/or damping plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203926102U CN202273695U (en) | 2011-10-14 | 2011-10-14 | Hot roll fine thread steel anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203926102U CN202273695U (en) | 2011-10-14 | 2011-10-14 | Hot roll fine thread steel anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202273695U true CN202273695U (en) | 2012-06-13 |
Family
ID=46194059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203926102U Expired - Fee Related CN202273695U (en) | 2011-10-14 | 2011-10-14 | Hot roll fine thread steel anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202273695U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559030A (en) * | 2017-10-18 | 2018-01-09 | 山东安科矿山支护技术有限公司 | A kind of hollow bolt steel and the grouted anchor bar comprising the anchor bar steel |
| CN109137903A (en) * | 2018-09-06 | 2019-01-04 | 山东焱鑫矿用材料加工有限公司 | A kind of non-cold working connection steel part with double rotational directions screw thread |
-
2011
- 2011-10-14 CN CN2011203926102U patent/CN202273695U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559030A (en) * | 2017-10-18 | 2018-01-09 | 山东安科矿山支护技术有限公司 | A kind of hollow bolt steel and the grouted anchor bar comprising the anchor bar steel |
| CN109137903A (en) * | 2018-09-06 | 2019-01-04 | 山东焱鑫矿用材料加工有限公司 | A kind of non-cold working connection steel part with double rotational directions screw thread |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20161014 |