CN104675827A - High-prestress equal-strength full-thread anchor rod nut - Google Patents
High-prestress equal-strength full-thread anchor rod nut Download PDFInfo
- Publication number
- CN104675827A CN104675827A CN201510072128.3A CN201510072128A CN104675827A CN 104675827 A CN104675827 A CN 104675827A CN 201510072128 A CN201510072128 A CN 201510072128A CN 104675827 A CN104675827 A CN 104675827A
- Authority
- CN
- China
- Prior art keywords
- nut
- inner sleeve
- thread
- overcoat
- described 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.)
- Pending
Links
- 239000011435 rock Substances 0.000 description 14
- 238000009434 installation Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a high-prestress equal-strength full-thread anchor rod nut. The anchor rod nut comprises an inner nut sleeve and an outer nut sleeve, wherein the outer nut sleeve sleeves the inner nut sleeve, the inner surface of the inner nut sleeve is provided with inner threads of the inner nut sleeve which is matched with an equal-strength full-thread anchor rod body, the outer surface of the inner nut sleeve is provided with outer threads of the inner nut sleeve, the inner surface of the outer nut sleeve is provided with inner threads of the outer nut sleeve, and the inner threads of the outer nut sleeve are matched with the outer threads of the inner nut sleeve; the pitch of the external threads of the inner nut sleeve is smaller than that of the equal-strength full-thread anchor rod body. The invention provides the high-prestress equal-strength full-thread anchor rod nut through which the rigidity of a support system is improved in a manner of improving the pre-tightening force of an equal-strength full-thread anchor rod.
Description
Technical field
The present invention relates to roadway support instrument, particularly relate to and a kind ofly improve the strong full-thread bolt nut such as the high pre-stress of supporting intensity.
Background technique
The effect of rockbolt installation prestressing force to joint, bedding, crack surface of discontinuity is: provide axial force and tangential force by anchor pole, reduces the reduction of surface of discontinuity shearing strength, stops absciss layer and slip.Keep original intensity, the integrity of coal and rock as far as possible.Anchor pole applies pressure stress to country rock, improves surrouding rock stress state.For tensile zone, part tensile stress can be offset, improve country rock resistance to tension; For being subject to shear zone, the frictional force produced by pressure stress, stoping between country rock bedding and sliding, improving the shear resistance of country rock.
Etc. strong full-thread bolt compared with common bolt, have manufacturing simple, easy for installation, anchor note up-to-standard rate is high, the advantages such as strong adaptability; Etc. strong full-thread bolt because all there is screw thread on the whole body, expand when repairing and cut out outer section, still can continue to use by mounting nuts.Large etc. strong full-thread bolt body of rod pitch, pitch is usually at about 10 ~ 12mm, and thread pitch is large, prestressed is low, and rockbolt installation prestressing force is little, still belongs to passive protecting, can not control the early stage absciss layer of country rock, Surrounding Rock Strength and integrity obviously reduce, and occur that moderate finite deformation causes support system to destroy; Meanwhile, wait strong full-thread bolt and the coarse frictional force of nut surface greatly, offset part moment of torsion time fastening, reduce the pretightening force of anchor pole, under equal moment of torsion, the pretightening force that pitch is large is little, waits strong full-thread bolt pitch large, less than common bolt pretightening force under equal moment of torsion.At present due to etc. the strong full-thread bolt prestressed low intensity of support system that causes reduces, the promotion and application of equity full-thread bolt are by force very limited, and the danger that strong full-thread bolt is on the verge of being replaced such as to make.Now in the urgent need to a kind of nut that the strong full-thread bolt prestressed such as can to improve.
Summary of the invention
The object of the invention is to overcome little shortcoming such as the pretightening force such as strong full-thread bolt such as grade that exists in above-mentioned prior art provide a kind of and improve the strong full-thread bolt nuts such as the high pre-stress of support system intensity by the strong full-thread bolt pretightening force such as improving.
Technological scheme of the present invention is achieved in that the strong full-thread bolt nuts such as a kind of high pre-stress, this anchor nut comprises nut inner sleeve and nut overcoat, described nut overcoat is socketed in described nut outside of inner cover, the internal surface of described nut inner sleeve be provided with etc. the nut inner sleeve internal thread that matches of the strong full-thread bolt body of rod, the outer surface of described nut inner sleeve is provided with nut inner sleeve outside thread, the internal surface of described nut overcoat is provided with nut overcoat internal thread, and described nut overcoat internal thread matches with described nut inner sleeve outside thread; The externally threaded pitch of described nut inner sleeve is less than the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade.
It is hexagonal inner sleeve head that the lower end of described nut inner sleeve is provided with cross section, and this external diameter of a circle in Hexagon place is greater than the internal diameter of described nut overcoat; The cross section of described nut overcoat is Hexagon, and the external diameter of a circle of described inner sleeve head is less than described nut overcoat inscribe diameter of a circle.
The pitch of screw thread such as the strong full-thread bolt body of rod such as described grade is 10 ~ 12 millimeters; Described nut inner sleeve outside thread is fine thread, and the pitch of this fine thread is 2 millimeters.
The position that described nut inner sleeve is identical with described nut overcoat all offers a positioning hole, arranges a locating stud in described positioning hole.
The length of described nut inner sleeve is greater than the length 3 ~ 5 millimeters of described nut overcoat.
The good effect that technological scheme of the present invention produces is as follows: described anchor nut comprises nut inner sleeve and nut overcoat, the internal surface of described nut inner sleeve be provided with etc. the nut inner sleeve internal thread that matches of the strong full-thread bolt body of rod, nut inner sleeve can with etc. the strong full-thread bolt body of rod pass through scyewed joint, the outer surface of described nut inner sleeve is provided with the outside thread matched with the internal thread of nut overcoat internal surface, scyewed joint is passed through between nut overcoat and nut inner sleeve, described nut inner sleeve outside thread pitch is less than the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade, under equal moment of torsion, the little then prestressing force of pitch is large, the prestressing force of nut is strengthened by the fine pitch screw thread between nut inner sleeve and nut overcoat, and then improve the intensity of whole support system.
The position that described nut inner sleeve is identical with described nut overcoat all offers a positioning hole, arranges a locating stud in described positioning hole, easy for installation, tightening nut inner sleeve and tightening nut overcoat can be made to complete continuously, do not need to change socket wrench.During use, drive locating stud by torque nut overcoat, locating stud drives nut inner sleeve, to be enclosed within etc. on strong full-thread bolt and to rotate in nut, and namely anchor nut rotates waiting on the strong full-thread bolt body of rod.Anchor nut wait on the strong full-thread bolt body of rod rotate so that adjustment waiting the position on the strong full-thread bolt body of rod, when nut inner sleeve top produces pretightening force to anchor dish, the moment of torsion pulling anchor nut increases, when moment of torsion increase to can cut off locating stud time, locating stud is cut off by the nut inner sleeve of anchor nut and the shearing stress of nut overcoat.Under equal moment of torsion, the pretightening force that pitch is little is large, the thread pitch that nut inner sleeve coordinates with nut overcoat be less than nut inner sleeve with etc. the pitch of strong full-thread bolt body of rod screw thread, when retrotorsion anchor nut overcoat cut off by locating stud, nut overcoat and nut inner sleeve relative torsion, nut overcoat reverses and continues to increase pretightening force, is easy to reach design pretightening force.
Nut inner sleeve be provided with etc. the supporting internal thread of the strong full-thread bolt body of rod, arbitrarily can regulate and wait the position on the strong full-thread bolt body of rod; The lower end of described nut inner sleeve is provided with hexagonal nut inner sleeve head, and this external diameter of a circle in Hexagon place is greater than the internal diameter of described nut overcoat; Operationally inner sleeve head can block nut overcoat, when needing after locating stud is cut off to dismantle anchor nut, counterclockwise torque nut overcoat, independent torsion can not be continued when nut overcoat withstands inner sleeve head, nut overcoat drives nut inner sleeve to reverse counterclockwise, anchor nut from etc. the strong full-thread bolt body of rod lay down; When needing skyhook nut after locating stud is cut off, reverse inner sleeve head clockwise with spanner, when reversing motionless with spanner, clockwise torque nut overcoat, anchor nut overcoat internal thread and inner sleeve outside thread produce relative torsion, and nut overcoat top is to anchor dish; Anchor nut overcoat internal thread and inner sleeve outside thread are closely-pitcheds, and pitch is little, and pretightening force is large, and nut overcoat reverses and continues to increase prestressing force, until reach design prestressing force.
Etc. strong full-thread bolt body of rod thread pitch at about 10 ~ 12mm, screw thread fine thread between the nut inner sleeve of anchor nut and nut overcoat, pitch is 2mm, under equal moment of torsion, the pretightening force that pitch is large is little, utilize the fine pitch screw thread between the nut inner sleeve of anchor nut and nut overcoat, substantially increase pretightening force.
The length of described nut inner sleeve is greater than the length of described nut overcoat, and object is that avoid clockwise torque nut overcoat, overcoat first pushes up anchor dish, is unfavorable for cutting off locating stud in order to allow inner sleeve first push up anchor dish.
Accompanying drawing explanation
Fig. 1 is the cutting structural representation of the strong full-thread bolt nut such as the present invention when not reaching pretightening force.
Fig. 2 is the cutting structural representation of the strong full-thread bolt nut such as the present invention when reaching pretightening force.
Fig. 3 be in the present invention nut inner sleeve and nut overcoat be socketed after one of cross section cut away view.
Fig. 4 be in the present invention nut inner sleeve and nut overcoat be socketed after cross section cut away view two.
1, be labeled as in figure: the strong full-thread bolt body of rod such as; 2, anchor dish; 3, nut inner sleeve; 31, inner sleeve head; 4, nut overcoat; 5, locating stud.
Embodiment
The strong full-thread bolt nut such as high pre-stress, as Fig. 1, shown in 2, the strong full-thread bolt body of rod 1 such as to comprise, anchor dish 2 and anchor nut, described anchor nut comprises nut inner sleeve 3 and nut overcoat 4, described nut overcoat is socketed in described nut outside of inner cover, the internal surface of described nut inner sleeve be provided with etc. the nut inner sleeve internal thread that matches of the strong full-thread bolt body of rod, the outer surface of described nut inner sleeve is provided with nut inner sleeve outside thread, the internal surface of described nut overcoat is provided with nut overcoat internal thread, described nut overcoat internal thread matches with described nut inner sleeve outside thread, the externally threaded pitch of described nut inner sleeve is less than the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade.
Described anchor nut comprises nut inner sleeve and nut overcoat, the internal surface of described nut inner sleeve be provided with etc. the nut inner sleeve internal thread that matches of the strong full-thread bolt body of rod, nut inner sleeve can with etc. the strong full-thread bolt body of rod pass through scyewed joint, the outer surface of described nut inner sleeve is provided with the outside thread matched with the internal thread of nut overcoat internal surface, scyewed joint is passed through between nut overcoat and nut inner sleeve, described nut inner sleeve outside thread pitch is less than the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade, the little then prestressing force of pitch is large, the prestressing force of nut is strengthened by the fine pitch screw thread between nut inner sleeve and nut overcoat, and then improve the intensity of whole support system.
As shown in Figure 3,4, it is hexagonal inner sleeve head 31 that the lower end of described nut inner sleeve is provided with cross section, this external diameter of a circle in Hexagon place is greater than the internal diameter of described nut overcoat, operationally inner sleeve head can block nut overcoat, nut overcoat can not be back-outed from nut inner sleeve lower end, the length of described nut inner sleeve is greater than the length of described nut overcoat, both length differences distances are 3 ~ 5 millimeters, object is to allow inner sleeve first push up anchor dish, avoid clockwise torque nut overcoat, overcoat first pushes up anchor dish, is unfavorable for cutting off locating stud; When behind nut inner sleeve top to anchor dish, continue clockwise torque nut overcoat, the strong full-thread bolt of equity applies pretightening force, the moment of torsion of torque nut overcoat increases, be increased to when can cut off locating stud, when namely nut overcoat drives the resistance of nut inner sleeve to be increased to cut off locating stud, locating stud is cut off.When needing skyhook nut after locating stud is cut off, inner sleeve head is reversed clockwise with spanner, the cross section of described nut overcoat is Hexagon, the external diameter of a circle of described inner sleeve head is less than described nut overcoat inscribe diameter of a circle, continue clockwise torque nut overcoat, now nut overcoat can not drive nut inner sleeve to reverse, the screw thread relative torsion that nut inner sleeve coordinates with nut overcoat, nut overcoat exceeds nut inner sleeve, nut overcoat top is to anchor dish, continue clockwise torque nut overcoat, further increase pretightening force, the screw thread that nut inner sleeve is connected with nut overcoat is fine thread, the little then pretightening force of pitch is large, do not need too high pulling torque can reach the pretightening force of design.
The position that described nut inner sleeve is identical with described nut overcoat all offers a positioning hole, one locating stud 5 is set in described positioning hole, easy for installation, whole tightening nut process, comprise tightening nut inner sleeve, cut off locating stud and tightening nut overcoat, midway does not need to pause and change torque wrench, only needs to reverse overcoat clockwise and can complete whole fastener cycle.Do not need too high pulling torque can reach the pretightening force of design, reduce the labor intensity of workman; Improve the convergent deformation that pretightening force stops country rock in time, improve country rock resistance to compression, shearing strength, improve the force-bearing situation of country rock; Avoid secondary supporting or the repeatedly wasting phenomena such as supporting.
The pitch of screw thread such as the strong full-thread bolt body of rod such as described grade is 10 ~ 12 millimeters, under equal moment of torsion, large screw pitch nut prestressed is low, rockbolt installation prestressing force is little, still belong to passive protecting, can not control the early stage absciss layer of country rock, surrounding rock supporting intensity and integrity obviously reduce, and occur that moderate finite deformation causes support system to destroy; Described nut inner sleeve outside thread is fine thread, the pitch of this fine thread is 2 millimeters, utilize the fine pitch screw thread between the nut inner sleeve of the strong full-thread bolts such as high pre-stress and overcoat, effectively can improve pretightening force, improve the integrity of surrounding rock supporting intensity and country rock.
Claims (5)
1. the strong full-thread bolt nut such as a high pre-stress, it is characterized in that: this anchor nut comprises nut inner sleeve and nut overcoat, described nut overcoat is socketed in described nut outside of inner cover, the internal surface of described nut inner sleeve be provided with etc. the nut inner sleeve internal thread that matches of the strong full-thread bolt body of rod, the outer surface of described nut inner sleeve is provided with nut inner sleeve outside thread, the internal surface of described nut overcoat is provided with nut overcoat internal thread, and described nut overcoat internal thread matches with described nut inner sleeve outside thread; The externally threaded pitch of described nut inner sleeve is less than the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade.
2. the strong full-thread bolt nut such as high pre-stress according to claim 1, is characterized in that: it is hexagonal inner sleeve head that the lower end of described nut inner sleeve is provided with cross section, and this external diameter of a circle in Hexagon place is greater than the internal diameter of described nut overcoat; The cross section of described nut overcoat is Hexagon, and the external diameter of a circle of described inner sleeve head is less than described nut overcoat inscribe diameter of a circle.
3. the strong full-thread bolt nut such as high pre-stress according to claim 1, is characterized in that: the pitch of screw thread such as the strong full-thread bolt body of rod such as described grade is 10 ~ 12 millimeters; Described nut inner sleeve outside thread is fine thread, and the pitch of this fine thread is 2 millimeters.
4. the strong full-thread bolt nut such as high pre-stress according to claim 1, is characterized in that: the position that described nut inner sleeve is identical with described nut overcoat all offers a positioning hole, arranges a locating stud in described positioning hole.
5. the strong full-thread bolt nut such as high pre-stress according to claim 1, is characterized in that: the length of described nut inner sleeve is greater than the length 3 ~ 5 millimeters of described nut overcoat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072128.3A CN104675827A (en) | 2015-02-12 | 2015-02-12 | High-prestress equal-strength full-thread anchor rod nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072128.3A CN104675827A (en) | 2015-02-12 | 2015-02-12 | High-prestress equal-strength full-thread anchor rod nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104675827A true CN104675827A (en) | 2015-06-03 |
Family
ID=53311284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510072128.3A Pending CN104675827A (en) | 2015-02-12 | 2015-02-12 | High-prestress equal-strength full-thread anchor rod nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104675827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156142A (en) * | 2015-09-30 | 2015-12-16 | 刘允勇 | Left-hand full-thread anchor rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3730035B2 (en) * | 1998-11-10 | 2005-12-21 | 岡部株式会社 | Nuts with caps for civil engineering anchors and attachment devices for civil engineering anchors |
| CN201973068U (en) * | 2011-03-30 | 2011-09-14 | 许昌四达电力设备有限公司 | Anti-theft nut |
| CN202520750U (en) * | 2012-03-09 | 2012-11-07 | 杭州图强工程材料有限公司 | Conversion nut and coarse-pitch threaded rod, anchor rod and anchor rod steel bar comprising same |
| CN202991077U (en) * | 2012-11-30 | 2013-06-12 | 上海旭尧玻璃钢制品有限公司 | Automatic drilling type hollow grouting anchor rod |
| CN203948116U (en) * | 2014-06-23 | 2014-11-19 | 山西晋煤集团技术研究院有限责任公司 | A kind of bolt support structure |
| CN204477009U (en) * | 2015-02-12 | 2015-07-15 | 刘允勇 | The strong full-thread bolt nut such as high pre-stress |
-
2015
- 2015-02-12 CN CN201510072128.3A patent/CN104675827A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3730035B2 (en) * | 1998-11-10 | 2005-12-21 | 岡部株式会社 | Nuts with caps for civil engineering anchors and attachment devices for civil engineering anchors |
| CN201973068U (en) * | 2011-03-30 | 2011-09-14 | 许昌四达电力设备有限公司 | Anti-theft nut |
| CN202520750U (en) * | 2012-03-09 | 2012-11-07 | 杭州图强工程材料有限公司 | Conversion nut and coarse-pitch threaded rod, anchor rod and anchor rod steel bar comprising same |
| CN202991077U (en) * | 2012-11-30 | 2013-06-12 | 上海旭尧玻璃钢制品有限公司 | Automatic drilling type hollow grouting anchor rod |
| CN203948116U (en) * | 2014-06-23 | 2014-11-19 | 山西晋煤集团技术研究院有限责任公司 | A kind of bolt support structure |
| CN204477009U (en) * | 2015-02-12 | 2015-07-15 | 刘允勇 | The strong full-thread bolt nut such as high pre-stress |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156142A (en) * | 2015-09-30 | 2015-12-16 | 刘允勇 | Left-hand full-thread anchor rod |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |