CN201560776U - Pre-stressed anchor lock bolt - Google Patents
Pre-stressed anchor lock bolt Download PDFInfo
- Publication number
- CN201560776U CN201560776U CN2009201810871U CN200920181087U CN201560776U CN 201560776 U CN201560776 U CN 201560776U CN 2009201810871 U CN2009201810871 U CN 2009201810871U CN 200920181087 U CN200920181087 U CN 200920181087U CN 201560776 U CN201560776 U CN 201560776U
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- CN
- China
- Prior art keywords
- anchor
- rod
- bolt
- anchor lock
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a pre-stressed anchor lock bolt which is provided with a threaded bolt body, and the tail of the threaded bolt body is provided with a tray, a ball pad, an anti-friction washer and a pre-tightening nut; and the bolt is characterized in that anchor cables are arranged between the anti-friction washer and the pre-tightening nut, and the anchor cables are a pair of wedge-shaped sleeves which are matched and sleeved on the bolt body. The pre-stressed anchor lock bolt can ensure the overall strength and the stability of the bolt, improve the tensile strength of the cross section of the bolt body, and improve the use safety and the reliability.
Description
Technical field
The utility model relates to a kind of support anchor rod that prevents the mine roof collapse.
Background technology
Bolt support technology is that the method by artificial reinforcing country rock strengthens roadway surrounding rock self intensity, makes full use of the self-supporting ability of country rock, realizes the effective control to roadway surrounding rock.In the bolt support system, under the certain situation of other condition, the action effect of anchor pole depends on the intensity and the installation quality of anchor pole to a great extent.As shown in Figure 1, be that afterbody at the body of rod 1 is equipped with pallet 2 and nut 5 usually as the anchor metal of end anchor, between pallet 2 and nut 5, be provided with ball pad 3 and anti-attrition packing ring 4, when anchored end is installed, necessary fastening nut makes the body of rod bear certain pre-tensile stress, so that give the country rock imposed load.Under the effect of the bigger pressure of roadway surrounding rock, the anchor rod strength deficiency can cause the anchor rod body fracture, and particularly anchor rod anchored end threaded portion shows as weak link; Anchor pole and surface, tunnel out of plumb, the stressed back of anchor pole common bolt pallet plays shear action to anchor pole; Machining screw has also reduced the effective stressed cross section of anchor pole after the roll extrusion, and obviously, the raising that inconvenience and cost are installed will be caused in the bar footpath that increases anchor pole in order to improve intensity.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of prestressing force type anchor break adrift bar is provided, to guarantee the bulk strength and the stability of anchor pole, increase the tensile strength in body of rod cross section, improving safety in utilization and reliability.
The utility model technical solution problem adopts following technical scheme:
The form of structure of the utility model prestressing force type anchor break adrift bar is that the screw thread body of rod is set, and the afterbody of the described screw thread body of rod has pallet, ball pad, anti-attrition packing ring and pre-load nut;
Design feature of the present utility model is that the anchor lock is set between described anti-attrition packing ring and pre-load nut, and described anchor lock is for being sleeved on the sleeve pipe of a pair of wedge-like engagement on the body of rod.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the bolt pretension in the prior art is bigger, and inconvenience is installed; In the utility model, because the setting of anchor lock, anchor nut only plays initial pretension effect, and its pretightning force is little, and is easy for installation, and the safety of supporting, reliability, stability are high, and it is safe in utilization to have improved the colliery.
2, compare as can be seen with the existing anchor pole detection data of same body of rod diameter, the tensile strength and the shear strength of the utility model anchor pole have improved 30%～35%, thereby have greatly improved its safety in utilization and reliability.
Description of drawings
Fig. 1 is the prior art structural representation
Label among Fig. 1: 1 body of rod, 2 pallets, 3 ball pads, 4 anti-attrition packing rings, 5 nuts.
Fig. 2 is the utility model structural representation.
Label among Fig. 2: 1 body of rod, 2 pallets, 3 ball pads, 4 anti-attrition packing rings, 5 anchors lock, 6 nuts.
Below pass through the specific embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
The specific embodiment
Referring to Fig. 2, identical with prior art is, present embodiment is provided with the screw thread body of rod 1, and the afterbody of the screw thread body of rod 1 has pallet 2, ball pad 3, anti-attrition packing ring 4 and pre-load nut 6;
In the present embodiment, anchor lock 5 is set between anti-attrition packing ring 4 and pre-load nut 6, anchor lock 5 is for being sleeved on the sleeve pipe of a pair of wedge-like engagement on the body of rod 1.
The setting of anchor lock 5, process a bit of screw thread as long as make in body of rod end, add 5mm with the thickness that guarantees nut 6 and can satisfy instructions for use, at this moment just greatly improve at tray position in the effective stressed cross section of anchor pole, the tensile strength and the shear strength of anchor pole have been improved, guarantee the bulk strength and the stability of anchor pole, reduced machining amount simultaneously, reduced processing cost.
On the other hand, existing anchor pole is after anchored end loads, necessary fastening nut makes the body of rod bear certain pre-tensile stress, so that give the country rock imposed load, pretightning force is bigger, inconvenience is installed, and in the whole use of supporting, nut is stressed bigger simultaneously, therefore can occur because screw strength is not enough, thread damage causes the anchoring failure phenomenon.The utility model equally also uses nut, but nut only plays the effect of pretension in the starting stage, after the country rock imposed load is given the body of rod, nut is locked certain pretightning force to anchor, make the due locking effect of anchor lock performance in the loading procedure afterwards, at this moment nut bearing load substantially no longer, thereby screw strength can not occur and cause anchor rod anchored failure phenomenon inadequately.Anchor pole non-deformability, steadiness significantly strengthen.
Claims (1)
1. prestressing force type anchor break adrift bar is provided with the screw thread body of rod (1), and the afterbody of the described screw thread body of rod (1) has pallet (2), ball pad (3), anti-attrition packing ring (4) and pre-load nut (6); It is characterized in that being provided with between described anti-attrition packing ring (4) and pre-load nut (6) anchor lock (5), described anchor lock (5) is for being sleeved on the sleeve pipe of a pair of wedge-like engagement on the body of rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201810871U CN201560776U (en) | 2009-12-10 | 2009-12-10 | Pre-stressed anchor lock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201810871U CN201560776U (en) | 2009-12-10 | 2009-12-10 | Pre-stressed anchor lock bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560776U true CN201560776U (en) | 2010-08-25 |
Family
ID=42625923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201810871U Expired - Fee Related CN201560776U (en) | 2009-12-10 | 2009-12-10 | Pre-stressed anchor lock bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201560776U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296975A (en) * | 2011-07-28 | 2011-12-28 | 湖南科技大学 | Bolt-prestressing device |
| CN103343696A (en) * | 2013-07-23 | 2013-10-09 | 天地科技股份有限公司 | Anchor plug pushing device used for anchor cable supporting structure and anchor cable supporting structure |
| CN110159329A (en) * | 2019-06-27 | 2019-08-23 | 湖南科技大学 | A kind of device and method for reinforcing anchor pole tail thread segment stress |
-
2009
- 2009-12-10 CN CN2009201810871U patent/CN201560776U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296975A (en) * | 2011-07-28 | 2011-12-28 | 湖南科技大学 | Bolt-prestressing device |
| CN102296975B (en) * | 2011-07-28 | 2014-04-23 | 湖南科技大学 | Bolt-prestressing device |
| CN103343696A (en) * | 2013-07-23 | 2013-10-09 | 天地科技股份有限公司 | Anchor plug pushing device used for anchor cable supporting structure and anchor cable supporting structure |
| CN110159329A (en) * | 2019-06-27 | 2019-08-23 | 湖南科技大学 | A kind of device and method for reinforcing anchor pole tail thread segment stress |
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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 |
Granted publication date: 20100825 Termination date: 20161210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |