CN2512933Y - Double cone building anchor bolt - Google Patents
Double cone building anchor bolt Download PDFInfo
- Publication number
- CN2512933Y CN2512933Y CN 02200453 CN02200453U CN2512933Y CN 2512933 Y CN2512933 Y CN 2512933Y CN 02200453 CN02200453 CN 02200453 CN 02200453 U CN02200453 U CN 02200453U CN 2512933 Y CN2512933 Y CN 2512933Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- expansion tube
- tightening latch
- expansion
- crab
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000005336 cracking Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 abstract 1
- 230000036316 preload Effects 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000013632 homeostatic process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
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- Joining Of Building Structures In Genera (AREA)
Abstract
The utility model relates to a double cone building anchor bolt which consists of a bolt shank, a nut, a gasket and expansion pipes. The front part of the bolt shank is provided with a standard thread; the section of the standard thread on the front of the bolt shank can be sleeved with steel thimble whose front end is provided with the nut and the gasket; the middle of the bolt shank is provided with a ring-shaped convex arris; the rear part of the bolt shank is provided with two columned sections which have equal lengths and diameters and the diameter of the position is much small and the outside is sleeved with two expansion pipes; the end of the columned section is two cones shape; during the installment as well as the preload and the normal use of the utility model, when the utility model occurs displacement by drawing, the two cones can augment the outer diameters of the expansion pipes, augment the extruding action between the expansion end and the hole wall so as to make the utility mode augment the anchorage force; the pipe walls of the expansion pipes are slotted and equally separated to at least three tooth petals and one strip is a slitting. The formations of the double cone and the double expansion pipes make the space between the anchor fixing end of the anchor and the concrete hole wall have bigger extruding and robbing areas as well as elevate the stability of the anchor fixing capacity of the anchor and make the prior expansion anchors increase the anchorage force.
Description
Technical field
The utility model relates to a kind of expansion anchor.
Technical background
Expansion anchor has been widely used in various fields such as structural strengthening and repairing, equipment and pipeline installation, building decoration engineering.The existing expansion anchor overwhelming majority is the bushing type expansion anchor with the low-intensity steel.Though price is lower, combination property is relatively poor, and anchor force is less, and kind, specification are also less, can not satisfy the multiple needs of construction market.
The technical problem that solves
The utility model bipyramid face building anchor bolt solves the existing little difficult problem of expansion anchor anchor force, increases the squeezing action between inflating end and the hole wall, makes crab-bolt increase anchor force.
Technological scheme
This bipyramid face building anchor bolt is by tightening latch, nut, packing ring and expansion tube are formed, the tightening latch front portion screw thread that sets up standard, front end is installed nut and packing ring, it is characterized in that: there are two length at the tightening latch rear portion, the cylindrical section that diameter all equates, diameter is less herein, two expansion tubes of overcoat, the cylindrical section end is two cone shapes, in the installation pretension and normal using process of crab-bolt, when crab-bolt was subjected to displacement by drawing, these two cones can increase the expansion tube external diameter, increase the squeezing action between inflating end and the hole wall, make crab-bolt increase anchor force, the expansion tube tube wall is cracked is divided at least three tooth lobes, and wherein one is elongated cracking.
There is a circular fin at above-mentioned tightening latch middle part,
The anterior standard thread section of above-mentioned tightening latch can the overcoat Steel Sleeve.
Above-mentioned two cone cone angles are 21 °.
Elongated preceding half length of cracking of above-mentioned expansion tube is widened, and expansion tube is anterior because tube wall perk external diameter is bigger, and mouth of pipe external diameter is greater than the tightening latch maximum diameter.
The front and back section of above-mentioned expansion tube inwall is the conical surface, and the centre is the tube face.
Above-mentioned expansion tube outer circumferential face is provided with the shape of threads teeth groove.
The tooth lobe of above-mentioned expansion tube is four.
Can there be a light face equal diameter section at above-mentioned tightening latch middle part in abutting connection with the screw thread place, as the mark zone of product standard and type.
Beneficial effect
The structure of double cone face, two expansion tubes, can make between crab-bolt anchored end and the concrete hole wall has bigger extruding, friction area, and has improved the stability of crab-bolt anchoring property.
The expansion tube periphery is provided with the screw thread flank of tooth, when the tightening latch conical surface enter expansion tube with its distending after, the screw thread flank of tooth can embed the concrete hole wall and produce the interface interlock, has increased the friction factor on the extruding interface.
The anterior bead of expansion tube is provided with the conical surface, tube wall is provided with and cracks, after expansion tube enters boring with tightening latch, because expansion tube elastic reaction radially, and be difficult to shift out boring with tightening latch, the antiskid that has improved expansion tube moves ability.
After the expansion tube periphery screw thread flank of tooth embeds the concrete hole wall, can reduce the decrement of crab-bolt anchor force under the long-term pulling capacity effect, reduce the slippage of extracting of crab-bolt.
The structure of double cone face, two expansion tubes makes it have stronger " follow-up expansion " function, for the constriction rate of pulling off that improves crab-bolt has been created condition, and therefore has higher safety in utilization.
The concrete aperture that crab-bolt is used is identical with the tightening latch external diameter, has reduced the difficulty in boring and cloth hole to greatest extent.
The profile structure is simple with processing technology, and preferable performance price ratio is arranged, and applicability is good, and is easy to use.
Steel Sleeve is set on tightening latch, makes crab-bolt timely distending of adjacent expansion tube when pretension is installed, on lower concrete substrate, still obtain better anchoring force.
Description of drawings
Fig. 1 is the utility model embodiment one a structural representation;
Fig. 2 is the utility model embodiment one expansion tube generalized section;
Fig. 3 is the generalized section that the utility model embodiment one expansion tube is installed the pretension state;
Fig. 4 is the generalized section of the utility model embodiment one expansion tube ultimate state;
Fig. 5 is the utility model embodiment two a structural representation;
Fig. 6 is the utility model embodiment two expansion tube generalized sections;
Fig. 7 is the generalized section that the utility model embodiment two expansion tubes are installed the pretension state;
Fig. 8 is the generalized section of the utility model embodiment two expansion tube ultimate states;
1-nut, 2-packing ring, 3-standard thread, 4-specification tag slot, 5-circular fin, 6-last expansion tube, 7-last cone, 8-following expansion tube, 9-following cone, 10-tightening latch, 11-Steel Sleeve.
Embodiment
Embodiment one, as shown in Figure 1, 2, this bipyramid face building anchor bolt is made up of tightening latch 10, nut 1, packing ring 2 and expansion tube, the tightening latch front portion screw thread 3 that sets up standard, front end is installed nut 1 and packing ring 2, at tightening latch 10 middle parts one circular fin 5 is arranged, the cylindrical section that the tightening latch rear portion has two length, diameter all to equate, diameter is less herein, be the initial ring set position of two expansion tubes 6,8, the cylindrical section end is two cones 7,9 that boundary dimension is identical, and cone angle is 21 °.Shown in Fig. 3,4, in the installation pretension and normal using process of crab-bolt, when crab-bolt is subjected to displacement by drawing, these two cones can increase the expansion tube external diameter by increasing the expansion tube external diameter, increase the squeezing action between inflating end and the hole wall, make crab-bolt increase anchor force, the expansion tube tube wall is cracked is divided into four tooth lobes, and wherein one is elongated cracking.
For cooperating the distortion of expansion tube in hole, elongated preceding half length of cracking of expansion tube is widened, and expansion tube is anterior because tube wall perk external diameter is bigger, and mouth of pipe external diameter is greater than the tightening latch maximum diameter.The front and back section of expansion tube inwall is the conical surface, and the centre is the tube face.The expansion tube outer circumferential face is provided with the shape of threads teeth groove.
Respectively with two cone adjoiners, respectively establish a light face equal diameter section, be used to reduce place, cone base angle stress and concentrate the plastic deformation that produces, to reduce the swell increment loss of crab-bolt.Cone bottom surface diameter is slightly less than the tightening latch maximum outside diameter, so that install.
The material of two expansion tubes is modified 40CrA, and appearance is zinc-plated, thickness 5 μ m.Boundary dimension is identical with installation direction.For cooperating tightening latch and expansion tube 40CrA material, select 6 grades of nuts for use.Nut and plain washer are zinc-plated standard piece.
Tightening latch material 40CrA, appearance is zinc-plated, thickness 5 μ m.The bar front portion is an exposed junction, and a little round platform is arranged at the top.When crab-bolt was installed, this round platform can be used for preventing damage rod end screw thread in the hammering tightening latch process.The tightening latch front portion screw thread that sets up standard is used for the rotation set nut pretension crab-bolt is installed, and screws the nut mounting article.There is a light face equal diameter section at the tightening latch middle part in abutting connection with the screw thread place, as the mark zone of product standard and type.
Embodiment two,
The anterior standard thread section of the tightening latch of bipyramid face building anchor bolt overcoat Steel Sleeve 11, Steel Sleeve 11 inside and outside plating zinc on surface thickness 5 μ m are coated at tightening latch front threads section.When the installation pretension stage screws nut; Steel Sleeve can limit adjacent expansion tube and move with tightening latch, guarantees adjacent expansion tube distending.The outer circumferential face of Steel Sleeve 11 can be used as crab-bolt specification mark zone.
The crab-bolt working principle
Crab-bolt is knocked in concrete boring, at the bottom of the hole is touched in the tightening latch bottom.At this moment, though the external diameter of expansion tube inner cone bead greater than bore diameter, under the hoop squeezing action of hole wall, after the elongated width that cracks reduced on the expansion tube, the anterior bead external diameter of expansion tube also reduced thereupon, and can clamp-on hole with tightening latch.
When the pretension crab-bolt, two expansion tubes are the jam-packed hole wall simultaneously, and tightening latch moves outside the hole when screwing nut, and the tightening latch conical surface enters expansion tube, forces the expansion tube rear end along cracking distending, and the double wedge of tube wall periphery is extruded the embedding hole wall, makes crab-bolt produce pretension anchor force N
0The pretension degree is high more, N
0Be worth big more.
The wall of a borehole by percussion drill (electric hammer) moulding is roughness, and general high spot is a concrete coarse aggregate, and recess is a cement stone.When the pretension crab-bolt, this rough hole wall does not wait the tooth lobe distortion behind the expansion tube distending, and its irregular contour can effectively stop expansion tube to rotate.In addition, expansion tube is reduced and the tightening latch that is locked by hole wall extruding back internal diameter, to stoping tightening latch together to rotate with nut certain effect is arranged also.
Under pulling capacity N effect, as N＜N
0The time, slippage does not take place in crab-bolt.Work as N=N
0The time, begin to take place slippage between expansion tube and the hole wall and between the tightening latch conical surface and the expansion tube.At this moment the tightening latch conical surface can force the further distending of expansion tube, increases the extruding force to hole wall, stops crab-bolt slippage outside the hole, and therefore obtains the anchor force increment.
The anti-pulling bearing capacity of crab-bolt is N
Max, its numerical value and pretension degree are irrelevant.Work as N=N
MaxThe time, the tightening latch conical surface enters the resistance of expansion tube and expansion tube with the surface friction drag equivalence between the hole wall, and at this moment anchor force no longer continues to increase, and crab-bolt is extracted displacement and is begun obvious increase.
Experimental study shows, concrete aperture d
cOvergauge δ
cCan increase the swell increment loss of crab-bolt, thereby to N
MaxValue has a significant effect.Along with δ
cValue increases, N
MaxValue decreases.Work as δ
cWhen value equals the maximum swelling amount of crab-bolt external diameter, N
MaxValue can reduce to 0.With N
MaxCorresponding displacement is that the limit is extracted displacement W
Max, along with N
0Increase W
MaxReduce to some extent, promptly the pretension degree of crab-bolt is high more, and it is more little that the limit is extracted shift value.
N
MaxAnd W
MaxBe two leading indicators of crab-bolt anchoring property, certain coherence is arranged between the two.When act on the crab-bolt pulling capacity hour, the anchor force of crab-bolt mainly is made of friction between expansion tube and the hole wall and flank of tooth interlocking.Along with pulling capacity increases, expansion tube distending amplitude increases, and the tapered wedge surface body wedge action between expansion tube and the hole wall becomes the principal element that constitutes the crab-bolt anchor force gradually.
The installation pretension of crab-bolt and normal using process also are the homeostasis processes between pulling capacity and the anchor force.Crab-bolt slippage occurs and shows pulling capacity greater than anchor force, and balance between the two is destroyed; Slippage causes follow-up expansion, and anchor force can stop slippage after increasing, and has set up new balance between the two again.
At N＞N
MaxThe time, can't recover again after pulling capacity and anchoring equilibrium of forces are destroyed.At this moment, if the tightening latch conical surface enters the frictional resistance of the resistance of expansion tube greater than expansion tube and hole wall, anchoring takes place and lost efficacy in crab-bolt because of tightening latch is pulled out; If the resistance that the tightening latch conical surface enters expansion tube is still less than the frictional resistance of expansion tube and hole wall, crab-bolt is pulled off after because of the tightening latch constriction anchoring takes place to be lost efficacy.
The using method of crab-bolt
1, selection and tightening latch or the identical drill bit of Steel Sleeve external diameter, with percussion drill vertical drilling on surface of concrete structure, minimum hole depth is 8～8.5 times of crab-bolt diameters, or by the relevant design requirement;
2, check dust stratification in drilling depth and the removing boring;
3, with the nut rotation set behind the masthead end, with iron hammer the crab-bolt tightening latch is rapped in the boring, and tightening latch bottom is touched at the bottom of the hole;
4, screw nut with spanner, make tightening latch extract displacement;
5, object is linked to each other with crab-bolt.
Claims (9)
1, a kind of bipyramid face building anchor bolt, by tightening latch, nut, packing ring and expansion tube are formed, the tightening latch front portion screw thread that sets up standard, front end is installed nut and packing ring, it is characterized in that: there are two length at the tightening latch rear portion, the cylindrical section that diameter all equates, diameter is less herein, two expansion tubes of overcoat, cylindrical section end are two cone shapes, in the installation pretension and normal using process of crab-bolt, when crab-bolt is subjected to displacement by drawing, these two cones can increase the expansion tube external diameter, increase the squeezing action between inflating end and the hole wall, make crab-bolt increase anchor force, the expansion tube tube wall is cracked is divided at least three tooth lobes, and wherein one is elongated cracking.
2, bipyramid face building anchor bolt according to claim 1 is characterized in that: described have a circular fin at the tightening latch middle part.
3, bipyramid face building anchor bolt according to claim 1 is characterized in that: the anterior standard thread section of described tightening latch overcoat Steel Sleeve.
4, according to claim 1 or 2 or 3 described bipyramid face building anchor bolts, it is characterized in that: described two cone cone angles are 21 °.
5, according to claim 1 or 2 or 3 described bipyramid face building anchor bolts, it is characterized in that: elongated preceding half length of cracking of described expansion tube is widened, and expansion tube is anterior because tube wall perk external diameter is bigger, and mouth of pipe external diameter is greater than the tightening latch maximum diameter.
6, according to claim 1 or 2 or 3 described bipyramid face building anchor bolts, it is characterized in that: the front and back section of described expansion tube inwall is the conical surface, and the centre is the tube face.
7, according to claim 1 or 2 or 3 described bipyramid face building anchor bolts, it is characterized in that: described expansion tube outer circumferential face is provided with the shape of threads teeth groove.
8, according to claim 1 or 2 or 3 described bipyramid face building anchor bolts, it is characterized in that: the tooth lobe of described expansion tube is four.
9, bipyramid face building anchor bolt according to claim 1 and 2 is characterized in that: there is a light face equal diameter section at described tightening latch middle part in abutting connection with the screw thread place, as the mark zone of product standard and type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02200453 CN2512933Y (en) | 2002-01-14 | 2002-01-14 | Double cone building anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02200453 CN2512933Y (en) | 2002-01-14 | 2002-01-14 | Double cone building anchor bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2512933Y true CN2512933Y (en) | 2002-09-25 |
Family
ID=33683657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02200453 Expired - Lifetime CN2512933Y (en) | 2002-01-14 | 2002-01-14 | Double cone building anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2512933Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061781A (en) * | 2011-01-20 | 2011-05-18 | 东莞欧博建材科技有限公司 | Anchored epoxy bar-planted rod with expanded double-end |
| CN103195781A (en) * | 2013-04-26 | 2013-07-10 | 铜陵浩荣电子科技有限公司 | Improved expansion bolt with multiple fastening stress points |
| CN104019098A (en) * | 2014-06-18 | 2014-09-03 | 苏州升德精密电气有限公司 | Nail for connecting boards |
| CN105556137A (en) * | 2013-09-16 | 2016-05-04 | 喜利得股份公司 | Expansion anchor |
| CN105626642A (en) * | 2016-03-04 | 2016-06-01 | 上海翔锐紧固件有限公司 | Anti-seismic anchor bolt |
| CN105864252A (en) * | 2016-06-07 | 2016-08-17 | 杭州斯泰新材料技术有限公司 | Lock type anchor bolt and installation structure on concrete |
| CN105864253A (en) * | 2016-06-07 | 2016-08-17 | 杭州斯泰新材料技术有限公司 | Punching and chamfering synchronous double-reaming anchor bolt and mounting structure on concrete |
| CN106369029A (en) * | 2015-07-22 | 2017-02-01 | 费希尔厂有限责任两合公司 | Fastening device and expansion anchor |
| CN107429721A (en) * | 2015-03-27 | 2017-12-01 | 喜利得股份公司 | Expansion anchor |
| CN109737127A (en) * | 2018-11-23 | 2019-05-10 | 国网浙江武义县供电有限公司 | A kind of loam wall branch ferropexy bolt |
| CN113847316A (en) * | 2021-09-24 | 2021-12-28 | 瑞安市亿品不锈钢制品有限公司 | High-strength double-expansion sleeve type expansion anchor bolt for crack concrete |
| CN116025623A (en) * | 2023-03-29 | 2023-04-28 | 河北固耐安工业股份有限公司 | Asynchronous double-expansion type reinforcement anchor bolt and use method thereof |
-
2002
- 2002-01-14 CN CN 02200453 patent/CN2512933Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061781A (en) * | 2011-01-20 | 2011-05-18 | 东莞欧博建材科技有限公司 | Anchored epoxy bar-planted rod with expanded double-end |
| CN103195781A (en) * | 2013-04-26 | 2013-07-10 | 铜陵浩荣电子科技有限公司 | Improved expansion bolt with multiple fastening stress points |
| CN105556137A (en) * | 2013-09-16 | 2016-05-04 | 喜利得股份公司 | Expansion anchor |
| CN105556137B (en) * | 2013-09-16 | 2018-06-29 | 喜利得股份公司 | expansion anchor |
| CN104019098A (en) * | 2014-06-18 | 2014-09-03 | 苏州升德精密电气有限公司 | Nail for connecting boards |
| CN104019098B (en) * | 2014-06-18 | 2016-05-04 | 苏州升德精密电气有限公司 | A kind of plank connected nail |
| US11572911B2 (en) | 2015-03-27 | 2023-02-07 | Hilti Aktiengesellschaft | Expansion anchor |
| CN107429721A (en) * | 2015-03-27 | 2017-12-01 | 喜利得股份公司 | Expansion anchor |
| CN106369029A (en) * | 2015-07-22 | 2017-02-01 | 费希尔厂有限责任两合公司 | Fastening device and expansion anchor |
| CN106369029B (en) * | 2015-07-22 | 2018-12-14 | 费希尔厂有限责任两合公司 | Clamp device and expansion anchor |
| CN105626642A (en) * | 2016-03-04 | 2016-06-01 | 上海翔锐紧固件有限公司 | Anti-seismic anchor bolt |
| CN105864253A (en) * | 2016-06-07 | 2016-08-17 | 杭州斯泰新材料技术有限公司 | Punching and chamfering synchronous double-reaming anchor bolt and mounting structure on concrete |
| CN105864252A (en) * | 2016-06-07 | 2016-08-17 | 杭州斯泰新材料技术有限公司 | Lock type anchor bolt and installation structure on concrete |
| CN105864253B (en) * | 2016-06-07 | 2019-02-05 | 杭州斯泰新材料技术有限公司 | A kind of dig synchronizes double expansion formula anchor bolts and the mounting structure on concrete |
| CN105864252B (en) * | 2016-06-07 | 2019-02-05 | 杭州斯泰新材料技术有限公司 | A kind of locking-type anchor bolt and the mounting structure on concrete |
| CN109737127A (en) * | 2018-11-23 | 2019-05-10 | 国网浙江武义县供电有限公司 | A kind of loam wall branch ferropexy bolt |
| CN113847316A (en) * | 2021-09-24 | 2021-12-28 | 瑞安市亿品不锈钢制品有限公司 | High-strength double-expansion sleeve type expansion anchor bolt for crack concrete |
| CN116025623A (en) * | 2023-03-29 | 2023-04-28 | 河北固耐安工业股份有限公司 | Asynchronous double-expansion type reinforcement anchor bolt and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120114 Granted publication date: 20020925 |