CN104329346A - High-strength prestressed anchor bolt - Google Patents
High-strength prestressed anchor bolt Download PDFInfo
- Publication number
- CN104329346A CN104329346A CN201410525454.0A CN201410525454A CN104329346A CN 104329346 A CN104329346 A CN 104329346A CN 201410525454 A CN201410525454 A CN 201410525454A CN 104329346 A CN104329346 A CN 104329346A
- Authority
- CN
- China
- Prior art keywords
- thread
- anchor bolt
- bolt
- tooth
- prestressed anchor
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 238000007669 thermal treatment Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000011513 prestressed concrete Substances 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012360 testing method 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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
Abstract
The invention relates to a high-strength prestressed anchor bolt. By improving the bolt thread form data, thread and rod transition region, heat treatment process and bolt material of the prestressed anchor bolt, the problems of deformed steel bars for prestressed concrete in use, such as short fatigue life, high brittleness, poor toughness, power elasticity, poor screwing precision, easy loosening and poor post-stretching mechanical properties, are solved. The success of the development of the high-strength prestressed anchor bolt solves the problem that advanced technologies have to be introduced for domestic wind turbine foundation construction; compared with ordinary deformed steel bar products used in conventional wind turbine foundations, the high-strength prestressed anchor bolt can save reinforcing steel bars by more than 30 percent and concrete by more than 40 percent and reduce earth volume by 50 percent, and the total construction cost is reduced by 25 percent to 35 percent in comparison with the total construction cost of a conventional wind turbine foundation. The construction period is shortened greatly.
Description
Technical field
the present invention relates to a kind of anchor bolt, particularly relate to the high-strength prestressed anchor bolt of a kind of wind energy turbine set unit foundation.
Background technique
external advanced technology is quoted in blower foundation construction domestic at present, and its basis steel is high-strength deformed steel bar rod; Domestic when using external blower foundation advanced technology, employ Twisted Steel for prestressed concrete, this kind of product be a kind of hot rolling type with discontinuous externally threaded straight steel bar, be adapted at using in concreting process, jointly form prestressed component with concrete; Twisted Steel for prestressed concrete is used for blower foundation and there is following shortcoming: though 1, lever strength is high, material fragility is large, poor toughness, poor flexibility, fatigue life are low; 2, the discontinuous outside thread poor dimensional precision of rolling, the installation precision of screw thread and nut is poor, easily loosen, tension performance is poor, cross section is coarse uneven, is mounted in pvc pipe inside and does not contact with concrete when Twisted Steel for prestressed concrete uses in blower foundation construction, applies tension force after installation to every root Twisted Steel of blower foundation, because the fragility of Twisted Steel is large, there occurs delayed fracture at applying tension force rear thread reinforcing bar.Make the advanced technology that blower foundation is built, stagnate owing to there is no to meet the high-strength deformed steel bar rod of usage requirement.
the fatigue life in use existed for Twisted Steel for prestressed concrete is low, fragility is large, poor toughness, poor flexibility, screw thread installation precision is poor, easily loosen, the problem such as poor mechanical property after stretching force, and my company have developed blower foundation high-strength prestressed anchor bolt.
Summary of the invention
the object of this invention is to provide a kind of high-strength prestressed anchor bolt, the advantages such as this bolt has high strength, not easy-rupturing, toughness good springiness.
for solving the problems of the technologies described above, technological scheme of the present invention is as follows:
a kind of high-strength prestressed anchor bolt, it is characterized in that, comprise screw rod and screw section, it is characterized in that, the tooth form of described screw section is:
tooth form is isosceles trapezoid, and pitch is 4mm, tooth height 2.4mm, the wide 2mm of central diameter tooth, and root of thread fillet radius is 0.5mm, and thread fillet radius is 0.2mm, and thread form angle is 36 °;
or be: tooth form is isosceles trapezoid, and pitch is 6mm, tooth height 3mm, the wide 3mm of central diameter tooth, and root of thread fillet radius is 0.8mm, and thread fillet radius is 0.3mm, and thread form angle is 36 °;
or be:: tooth form is isosceles trapezoid, and pitch is 8mm, tooth height 2.4mm, tooth bottom width 4mm, and root of thread fillet radius is 1mm, and thread fillet radius is 0.5mm, and thread form angle is 40 °.
the excessive place of described screw section and screw rod arranges the transition zone of 40-50mm, the screw thread of transition zone by roll extrusion through being progressively transitioned into diameter of thread.
bolt material oxygen content in steel is less than 10mg/m
3
, nitrogen content is less than 12mg/m
3
, hydrogen content is less than 2mg/m
3
, phosphorus Sulpher content is less than 0.020%.
bolt heat treatment process is rapid thermal treatment: rate of heating reaches 100 DEG C/more than s.
beneficial effect of the present invention:
succeeding in developing of high-strength prestressed anchor bolt, solve domestic blower foundation and build quoting of advanced technology, the regular screw threads product made from steel used compared with conventional fan basis saves reinforcing bar more than 30%, save concrete more than 40%, reduce earth volume 50%, total cost comparatively saves 25% to 35% in conventional fan basis.Construction period significantly shortens.
Accompanying drawing explanation
below with reference to accompanying drawing, specific embodiments of the invention are described in further detail, wherein:
fig. 1 is a kinds of structures schematic diagram of anchor bolt of the present invention;
fig. 2 is the another kind of type structure schematic diagram of anchor bolt of the present invention;
fig. 3 is the screw thread schematic diagram of anchor bolt of the present invention;
fig. 4 is the first tooth form data of anchor bolt of the present invention;
fig. 5 is the second tooth form data of anchor bolt of the present invention;
fig. 6 is the third tooth form data of anchor bolt of the present invention;
fig. 7 is screw thread and the bar portion transition schematic diagram of anchor bolt of the present invention.
Embodiment
embodiment 1
a kind of high-strength prestressed anchor bolt, comprising screw rod 1 and screw section 2, Fig. 1 and 2 is two kinds of common prestressed anchor bolts respectively, and Fig. 1 uses hexagon nut, and Fig. 2 uses connector to connect.
bolt is a kind of typical many breach part, its fatigue behaviour will be subject to the impact of the structure of bolt, tooth form size, the many factors such as material and manufacturing process significantly, mechanics factor specific to bolt connecting body, the screw thread ditch of bolt is the centrostigma of the lower stress of the bolt effect of carrying outward, screw thread ditch diameter is more close to the diameter of round steel during roll extrusion, bearing capacity is larger, is also beneficial to roll forming, but thread height affects not again the intensity of tooth form.By the Strength co-mputation to tooth form, to the Strength co-mputation of bolt minimum diameter, the determination root of thread diameter of scientific and reasonable experiment, accurate analog, fillet radius, thread form angle, namely meet requirement of strength also to meet rolled thread processing technological requirement, obtained mechanical performance data and the tooth form data of more than 4000 bolt by roll extrusion experiment many times and mechanical property test, finally determine the crab-bolt tooth form data of three kinds of pitch.
fig. 4 is that roll extrusion central diameter existsФ 28-Ф 40
corresponding tooth form data: tooth form is isosceles trapezoid, and pitch is 4mm, tooth height 2.4mm, the wide 2mm of central diameter tooth, and root of thread fillet radius is 0.5mm, and thread fillet radius is 0.2mm, and thread form angle (the adjacent two tooth top-cross angles of screw thread) is 36 °.
fig. 5 is that roll extrusion central diameter existsФ 45-Ф 60
corresponding tooth form data: tooth form is isosceles trapezoid, and pitch is 6mm, tooth height 3mm, the wide 3mm of central diameter tooth, and root of thread fillet radius is 0.8mm, and thread fillet radius is 0.3mm, and thread form angle (the adjacent two tooth top-cross angles of screw thread) is 36 °.
fig. 6 is that roll extrusion central diameter is at Ф 40-Ф 60, and tooth form data corresponding during punching perfusion high-strength grout in rock mass: tooth form is isosceles trapezoid, pitch is 8mm, tooth height 2.4mm, tooth bottom width 4mm, root of thread fillet radius is 1mm, and thread fillet radius is 0.5mm, and thread form angle (the adjacent two tooth top-cross angles of screw thread) is 40 °.
except screw thread ditch, another weak part that the threaded bolt in two end part affects bolt strength is the transition position in screw thread and bar portion, the sudden change of transition position not Formation cross-section when designing, have employed the transition zone of about 40 ~ 50mm, by roll extrusion central diameter progressively to diameter of thread, eliminate the generation of stress concentration point, improve the suitability of bolt to objective environment.As shown in Figure 7.
the mechanical property that high-strength prestressed anchor bolt can have and mechanical property, lean on following some ensure:
1. have excellent alloy material, oxygen content in steel is less than 10mg/m3, and nitrogen content is less than 12mg/m3, and hydrogen content is less than 2mg/m3, and phosphorus Sulpher content is less than 0.020%.The sublimate of the high-strength prestressed anchor bolt steel of cold rolling, low alloying, microalloying ensure that the adaptability of engineering structure part to environment and the obdurability of material from source.
the design of threads geometrical parameters, ensure that the moulding process requirement of requirement of strength and cold rolling, and the tooth form of design is isosceles trapezoid, and thread form angle is 18 ° and 20 ° and is easy to roll forming, and centring property is good, and root of the tooth place intensity is high.Cold rolling room temperature roll forming in ZA28-63 type or ZA28-125 type thread rolling machine of screw thread.
the mechanical property reaching high-strength prestressed anchor bolt realizes on induction heating rapid thermal processing technique equipment.Induction heating rapid thermal processing technique can improve the mechanical property of steel significantly, improves the surface quality of steel.End thread and screw bolt are at laser heating, and the full-automatic heat treatment production line of quenching, tempering completes quenching with Subsequent tempering.The rate of heating of bolt can reach 100 DEG C/more than s, and in the heating quenching process of steel, bolt is screw type straight line motion when running state, and can keep the original precision thread surface of bolt, bolt heats in air of low density therein media environment.Because bolt waiting time under higher than the high temperature condition of 850 DEG C is no more than 8 seconds, bolt surface can only form slight compact oxidation layer, ensure that the original precision of screw thread.There is this induction heating rapid thermal processing technique equipment just to achieve the technique of the shaping after-baking of elder generation of bolt, namely ensure that the precision of bolt in turn ensure that the high strength of bolt.
it will be recognized by those skilled in the art, under the prerequisite not departing from protection scope of the present invention, various amendment, change and combination can be carried out to above-mentioned mode of execution, and think that this amendment, change and combination are within the scope of originality thought.
Claims (4)
1. a high-strength prestressed anchor bolt, is characterized in that, comprises screw rod and screw section, it is characterized in that, the tooth form of described screw section is:
Tooth form is isosceles trapezoid, and pitch is 4mm, tooth height 2.4mm, the wide 2mm of central diameter tooth, and root of thread fillet radius is 0.5mm, and thread fillet radius is 0.2mm, and thread form angle is 36 °;
Or be: tooth form is isosceles trapezoid, and pitch is 6mm, tooth height 3mm, the wide 3mm of central diameter tooth, and root of thread fillet radius is 0.8mm, and thread fillet radius is 0.3mm, and thread form angle is 36 °;
Or be:: tooth form is isosceles trapezoid, and pitch is 8mm, tooth height 2.4mm, tooth bottom width 4mm, and root of thread fillet radius is 1mm, and thread fillet radius is 0.5mm, and thread form angle is 40 °.
2. a kind of high-strength prestressed anchor bolt as claimed in claim 1, is characterized in that, the excessive place of described screw section and screw rod arranges the transition zone of 40-50mm, the screw thread of transition zone by roll extrusion through being progressively transitioned into diameter of thread.
3. a kind of high-strength prestressed anchor bolt as claimed in claim 1, is characterized in that, bolt material oxygen content in steel is less than 10mg/m
3, nitrogen content is less than 12mg/m
3, hydrogen content is less than 2mg/m
3, phosphorus Sulpher content is less than 0.020%.
4. a kind of high-strength prestressed anchor bolt as claimed in claim 1, is characterized in that, bolt heat treatment process is rapid thermal treatment: rate of heating reaches 100 DEG C/more than s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525454.0A CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525454.0A CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104329346A true CN104329346A (en) | 2015-02-04 |
| CN104329346B CN104329346B (en) | 2016-08-17 |
Family
ID=52404130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410525454.0A Expired - Fee Related CN104329346B (en) | 2014-10-09 | 2014-10-09 | A kind of high-strength prestressed anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104329346B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065410A (en) * | 2015-07-23 | 2015-11-18 | 南通汇能电力科技有限公司 | High-strength bolt for tension control structure |
| CN106498856A (en) * | 2016-11-28 | 2017-03-15 | 柳州欧维姆工程有限公司 | A kind of engineering tensioning system of two halves formula with thread |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1141232A1 (en) * | 1981-05-06 | 1985-02-23 | Myaskovskij Evgenij G | Method of making treaded joint |
| JP4025851B1 (en) * | 2007-04-17 | 2007-12-26 | 株式会社アルケミー | Thread section deformed steel bar |
| CN102352884A (en) * | 2011-10-14 | 2012-02-15 | 山东焱鑫矿用材料加工有限公司 | Steel used for non-cold-working connection |
| CN202520747U (en) * | 2012-01-17 | 2012-11-07 | 天津市天铁轧二制钢有限公司 | Hot-rolled high-strength anchor bolt for wind power foundation |
| RU2470198C1 (en) * | 2011-06-23 | 2012-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный индустриальный университет" (ФГБОУ ВПО"МГИУ") | Movable threaded connection with load equalisation along thread turns |
| CN103286246A (en) * | 2013-05-16 | 2013-09-11 | 湖北德克特种异型高强螺栓有限公司 | Method for manufacturing high-strength screws with fine threads for wind-driven generator foundations |
| CN204140604U (en) * | 2014-10-09 | 2015-02-04 | 青海金阳光特种钢材股份有限公司 | A kind of high-strength prestressed anchor bolt |
-
2014
- 2014-10-09 CN CN201410525454.0A patent/CN104329346B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1141232A1 (en) * | 1981-05-06 | 1985-02-23 | Myaskovskij Evgenij G | Method of making treaded joint |
| JP4025851B1 (en) * | 2007-04-17 | 2007-12-26 | 株式会社アルケミー | Thread section deformed steel bar |
| RU2470198C1 (en) * | 2011-06-23 | 2012-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный индустриальный университет" (ФГБОУ ВПО"МГИУ") | Movable threaded connection with load equalisation along thread turns |
| CN102352884A (en) * | 2011-10-14 | 2012-02-15 | 山东焱鑫矿用材料加工有限公司 | Steel used for non-cold-working connection |
| CN202520747U (en) * | 2012-01-17 | 2012-11-07 | 天津市天铁轧二制钢有限公司 | Hot-rolled high-strength anchor bolt for wind power foundation |
| CN103286246A (en) * | 2013-05-16 | 2013-09-11 | 湖北德克特种异型高强螺栓有限公司 | Method for manufacturing high-strength screws with fine threads for wind-driven generator foundations |
| CN204140604U (en) * | 2014-10-09 | 2015-02-04 | 青海金阳光特种钢材股份有限公司 | A kind of high-strength prestressed anchor bolt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065410A (en) * | 2015-07-23 | 2015-11-18 | 南通汇能电力科技有限公司 | High-strength bolt for tension control structure |
| CN106498856A (en) * | 2016-11-28 | 2017-03-15 | 柳州欧维姆工程有限公司 | A kind of engineering tensioning system of two halves formula with thread |
| CN106498856B (en) * | 2016-11-28 | 2018-07-27 | 柳州欧维姆工程有限公司 | A kind of engineering tensioning system of the two halves formula with thread |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104329346B (en) | 2016-08-17 |
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Granted publication date: 20160817 Termination date: 20211009 |