CN209053626U - Multi-functional no longitudinal rib screw-thread steel - Google Patents
Multi-functional no longitudinal rib screw-thread steel Download PDFInfo
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- CN209053626U CN209053626U CN201821789277.7U CN201821789277U CN209053626U CN 209053626 U CN209053626 U CN 209053626U CN 201821789277 U CN201821789277 U CN 201821789277U CN 209053626 U CN209053626 U CN 209053626U
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- screw
- cross rib
- thread
- rib
- thread steel
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Abstract
The utility model provides a kind of multi-functional no longitudinal rib screw-thread steel, it is to be equipped with the molding spiral cross rib of continuously hot rolling in the upper along its length of 14--40 millimeters of reinforcing bars of diameter, it is characterized in that, the spiral cross rib is made of the cross rib of two kinds of forms, one is the cross rib of existing roomy screw pitch form and for it is left-handed to, another kind is cross rib of the dextrorotation to trapezoidal thread form, and both the above cross rib is alternately arranged according to certain segment length；The screw-thread steel can be realized as building iron and is directly connected to nut set；It can directly be intercepted according to the design length of screw-thread steel resin anchor, without carrying out secondary operation dextrorotation to standard thread；It is used after can directly intercepting as pre-embedded anchoring bolts.
Description
Technical field
The utility model relates to screw-thread steels.
Background technique
Screw-thread steel is the reinforcing bar with ribbing by the surface of bar milk production, also known as Ribbed Bar, usually with along length side
To equally distributed spiral cross rib, also some is equipped with longitudinal rib in two sides.There is no being known as without longitudinal rib screw-thread steel for longitudinal rib.Existing reinforcing bar
Nominal diameter range be 6~50mm, the screw-thread steel series nominal diameter of China's standard recommendation is 6,8,10,12,16,20,25,
32,40,50mm, normal length scale are 9m, 12m.The shape of existing cross rib is spiral shape, herringbone, 3 kinds of crescent, cross rib
Screw pitch is generally the screw pitch of the roomy form of 10mm--20mm, and cross rib be all dextrorotation to.The general original of existing cross rib design
Be then: the angle β of cross rib and reinforcing bar axis is no less than 45 degree, and cross rib nominal spacing is not greater than the 0.7 of reinforcing bar nominal diameter
Times, the angle α of cross rib side and rebar surface cannot be less than 45 degree, the gap (packet in reinforcing bar two adjacent surfaces between cross rib end
Including longitudinal rib width) summation should not exceed the 20% of reinforcing bar nominal perimeter, when reinforcing bar nominal diameter is not more than 12mm, opposite finned surface
Product is no less than 0.055, when nominal diameter is 14mm and 16mm, and opposite wall rib area is no less than 0.060, and nominal diameter is greater than
When 16mm, opposite wall rib area is no less than 0.065.
Effect and concrete due to cross rib have biggish cementitiousness, thus can preferably bear the effect of external force, because
This screw-thread steel is widely used in the construction of the civil engineerings such as house, bridge, road, arrives highway, railway, bridge, culvert, tunnel greatly
The public utilities such as road, flood control, dam, small to the basis of building construction, beam, column, wall, plate, the screw thread steel capital is indispensable knot
Structure material.But it since normal length scale is 9m, 12m, generally requires to exist screw-thread steel when using in some heavy constructions
It is connected with each other on length direction.Reinforcing bar connection type is such as overlapped, is welded earlier, sleeve cold extrusion connects, these modes are all
There are shortcomings.Interconnection technique more advanced at present is that reinforcing bar both ends process upper screw thread, is attached using thread bush.Steel
The processing method of muscle screw thread has direct rolled thread, squeezes rib rolled thread and ripping rib and rolling depressing screw thread.Direct rolled thread squeezes rib rolling
Although pressing screw thread, the processing is simple, it can not meet influence of the bar diameter difference to screw thread mechanical property；Ripping rib and rolling depressing screw thread adds
Work is after the cross rib of reinforcing bar and longitudinal rib are first carried out stripping processing, and the column diameter before making reinforcing bar rolled thread reaches same size, so
Carry out rolling screw-threads molding again afterwards, although accuracy of thread is high, joint quality is stablized, and needs secondary operation screw thread, i.e., cannot
One-pass molding also reduces splice section.
At present in the projects such as tunnel developing, side slope protection, coal mine excavation, require using bolt support technology pair
Working face peripheral rock is implemented to reinforce, and guarantees the stability of country rock, to prevent the generation of cave-in accident.Bolt support technology
The commonly used screw-thread steel resin anchor of anchor pole.Screw-thread steel resin anchor is by the screw-thread steel body of rod, tail portion fastening nut and other attachmentes
Composition.The screw-thread steel body of rod be regular screw threads steel is intercepted according to rock-bolt length, then by screw-thread steel body of rod tail portion carry out it is secondary
It is machined to the screw thread cooperated with fastening nut.Screw thread process method is to lead to bar using the vehicle circle techniques such as rolled thread or thread
Body section intensity is not equal strong, affects the mechanical properties, restricts the intensity of entire anchor rod system；Also, secondary operation will cause anchor
The production cost increases for bar, production efficiency reduces.In addition, needing to be pushed into Anchor Agent with anchor pole when screw-thread steel resin anchor operation
Bottom hole, then anchor pole Stirring Anchor Agent is driven with construction equipment, make Anchor Agent that chemical reaction occur by anchor rod body and country rock
It coheres and is integrated.Since current rockbolt installation equipment is all dextrorotation to (clockwise to end in terms of tail portion), anchor pole is in up time
When needle rotates, dextrorotation cross rib can generate a power for screwing out Anchor Agent outward, i.e. " drawing outside Anchor Agent " phenomenon for being commonly called as of industry.
The phenomenon will cause that Anchor Agent is loose, and leakiness influences the anchoring strength of anchor pole and country rock, constrain the strong of entire anchor system
Degree.So current right-handed thread steel plays restrictive function to the anchoring strength of anchor pole.
At present at construction equipment basis, pre-embedded anchoring bolts or anchor bolt, this kind of bolt standard component one will be used
As be all specially with lathe process, a part processing is got up fairly cumbersome, and low efficiency is at high cost.
Summary of the invention
The purpose of the utility model is to overcome the effective connectivity problem of existing screw-thread steel and screw-thread steel resin anchors, pre- buried
The above-mentioned deficiency of foot bolt provides a kind of multi-functional no longitudinal rib screw-thread steel.
A kind of multi-functional no longitudinal rib screw-thread steel is to be equipped with Continuous Heat in the upper along its length of 14--40 millimeters of reinforcing bars of diameter
Roll molding spiral cross rib, which is characterized in that the spiral cross rib is made of the cross rib of two kinds of forms, and one is existing roomy
The cross rib of screw pitch form and to be left-handed to referred to as left-handed cross rib, another kind is cross rib of the dextrorotation to trapezoidal thread form, referred to as the right side
Cross rib is revolved, both the above cross rib is alternately arranged according to certain segment length；The left-handed cross rib segment length is 500--1500mm,
Dextrorotation cross rib segment length is 100--500mm.
Further, for the ease of continuously hot rolling molding, preferred 30-60 ° of the trapezoidal thread form angle of the dextrorotation cross rib, screw pitch
P chooses according to the size of screw-thread steel nominal diameter D, and thread height h is chosen by the 30--50% of screw pitch p；Nominal diameter D and screw pitch p
Corresponding relationship it is as follows, when unit mm:D=14--17, p=2；When D=18--22, p=2.5；When D=23--27, p=3.0；D=28--
When 33, p=3.5；When D=34--40, p=4.
Further, it processes for the ease of the design of hot rolling mold, when thread height h is chosen by the 30--50% of screw pitch p, answers
Height h is set to take the integer of millimeter.
Further, it is connected for the ease of the both ends of building bar, it is desirable that both ends are all dextrorotation to cross rib, wherein one end
Segment length is 100--500mm, and the other end is the connector that segment length is 50--100mm.
The good effect of the utility model:
1, the screw-thread steel is used as building iron, can be by matching therewith when screw-thread steel both ends are designed with dextrorotation cross rib
The nut set of set directly connects two screw-thread steels；When screw-thread steel only has one end to be equipped with dextrorotation to cross rib, the other end can be clipped
Left-handed cross rib section, can be realized with nut set directly connect with next reinforcing bar；When one section of spiral shell for needing spreading different length
When line steel, as long as being used and its conveniently according to the interception of spreading length at least provided with a section of dextrorotation cross rib.
2, the screw-thread steel can directly be intercepted according to the design length of screw-thread steel resin anchor, as long as guaranteeing that one end is a left side
Revolve cross rib, the other end is dextrorotation cross rib.It is inserted into anchor hole using one end of left-handed cross rib as anchor pole front end when using, due to preceding
The cross rib at end is in left-handed to can avoid when anchor pole rotates clockwise stirring " drawing outside Anchor Agent " phenomenon, improve Anchor Agent
Compactness, and then the bond strength of Anchor Agent is improved, guarantee the anchor force of anchor pole.Due to the cross that its rear end is right-handed thread form
Rib can be used for installing fastening nut matched with its, apply anchor force.
3, when screw-thread steel interception is at screw-thread steel resin anchor, since rear end is directly rolled into the cross of right-handed thread form
Rib keeps the effective diameter of anchor pole constant, ensure that original mechanical property of anchor pole, improve peace without carrying out secondary operation screw thread
Overall coefficient, it is ensured that use is safe, while also reducing the production cost of anchor pole.
4, since the tooth form of dextrorotation cross rib screw thread is the screw pitch design of reference standard screw thread, and it is designed as trapezoidal tooth form,
Trapezoidal shoulder angle and bottom corner are rounding off, convenient for being directly rolled into the cross rib of right-handed thread form.
5, the screw-thread steel can use after directly intercepting as pre-embedded anchoring bolts according to the design requirement of Equipment Foundations.
The dedicated processing factory of foundation bolt can be directly using the screw-thread steel as raw material, and the standard of high-intensitive anchor bolt is processed into interception
Part guarantees original mechanical property, and easy to process, reduces production cost.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model；Fig. 2 is the enlarged drawing of Fig. 1 side view；Fig. 3 is that both ends are all dextrorotation cross rib
Structure chart；Fig. 4 is the tooth form structure chart for the dextrorotation cross rib that thread form angle is 60 °.
In figure, 1- dextrorotation cross rib, the left-handed cross rib of 2-, 3- shoulder angle, 4- bottom corner.
Specific embodiment
As shown in Fig. 1 Fig. 2, a kind of multi-functional no longitudinal rib screw-thread steel, is in 14--40 millimeters of reinforcing bars of diameter along length side
It is equipped with the molding spiral cross rib of continuously hot rolling upwards, wherein the spiral cross rib is made of the cross rib of two kinds of forms, one is
The cross rib of existing roomy screw pitch form and to be left-handed to referred to as left-handed cross rib 2, another kind is cross of the dextrorotation to trapezoidal thread form
Rib, abbreviation dextrorotation cross rib 1, both the above cross rib is alternately arranged according to certain segment length；The 2 segment length b of left-handed cross rib=
500--1500mm, 1 segment length a=100--500mm of dextrorotation cross rib.
Further, for the ease of continuously hot rolling molding, referring to metric thread standard, the thread form angle of the dextrorotation cross rib 1
It is preferred that 30-60 °, screw pitch p chooses according to the size of screw-thread steel nominal diameter D, and thread height h is chosen by the 30--50% of screw pitch p；
Nominal diameter D and the corresponding relationship of screw pitch p are as follows, when unit mm:D=14--17, p=2；When D=18--22, p=2.5；D=23--
When 27, p=3.0；When D=28--33, p=3.5；When D=34--40, p=4.
If Fig. 4 shows the tooth form structure chart of dextrorotation cross rib, preferably 60 ° of thread form angle, and tooth form shoulder angle 3 are shown in figure
It is rounding off with bottom corner 4.
As screw-thread steel nominal diameter D=28--33mm, p=3.5mm, thread height h choose h=3.5* by the 40% of screw pitch p
0.4=1.4mm。
As shown in figure 3, the both ends for the ease of building bar connect, it is desirable that both ends are all dextrorotation to cross rib, wherein one
Segment length a=the 100--500mm at end, the other end are the connectors of segment length c=50--100mm.
In addition, the utility model should ensure that mold is corresponding during the rolling process, it is ensured that rolled piece bites simultaneously；It should ensure that cross rib
Length；Gap (gear clearance, transmission shaft clearance) of the production equipment in power train process should be eliminated, guarantees that screw-thread steel is horizontal
The screw thread pair continuity of rib screw thread is complete；Stringent temperature control system should be used, guarantees that poker temperature drop error cannot be greater than
50CO, the rolled piece in temperature-fall period is avoided to be denaturalized.
Claims (6)
1. a kind of multi-functional no longitudinal rib screw-thread steel is to be equipped with continuously hot rolling in the upper along its length of 14--40 millimeters of reinforcing bars of diameter
Molding spiral cross rib, which is characterized in that the spiral cross rib is made of the cross rib of two kinds of forms, and one is existing roomy spiral shells
Cross rib away from form and to be left-handed to referred to as left-handed cross rib, another kind is cross rib of the dextrorotation to trapezoidal thread form, abbreviation dextrorotation
Cross rib, both the above cross rib are alternately arranged according to certain segment length；The left-handed cross rib segment length is 500--1500mm, right
Rotation cross rib segment length is 100--500mm.
2. multi-functional no longitudinal rib screw-thread steel as described in claim 1, which is characterized in that the trapezoidal tooth form of the dextrorotation cross rib
Preferred 30-60 ° of angle, screw pitch p choose according to the size of screw-thread steel nominal diameter D, and thread height h is selected by the 30--50% of screw pitch p
It takes；Nominal diameter D and the corresponding relationship of screw pitch p are as follows, when unit mm:D=14--17, p=2；When D=18--22, p=2.5；D=
When 23--27, p=3.0；When D=28--33, p=3.5；When D=34--40, p=4.
3. multi-functional no longitudinal rib screw-thread steel as described in claim 1, which is characterized in that preferred screw-thread steel nominal diameter 16,18,
20,22,25,32mm one of which.
4. multi-functional no longitudinal rib screw-thread steel as claimed in claim 2, which is characterized in that the trapezoidal thread form angle of preferred dextrorotation cross rib
For 30 °, 45 °, 60 ° of one of which.
5. multi-functional no longitudinal rib screw-thread steel as claimed in claim 2, which is characterized in that thread height h presses the 30-- of screw pitch p
When 50% selection, height h should be made to take the integer of millimeter.
6. multi-functional no longitudinal rib screw-thread steel as described in claim 1, which is characterized in that screw-thread steel both ends are all dextrorotation to cross
Rib, wherein the segment length of one end is 100--500mm, and the other end is the connector that segment length is 50--100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821789277.7U CN209053626U (en) | 2018-11-01 | 2018-11-01 | Multi-functional no longitudinal rib screw-thread steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821789277.7U CN209053626U (en) | 2018-11-01 | 2018-11-01 | Multi-functional no longitudinal rib screw-thread steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209053626U true CN209053626U (en) | 2019-07-02 |
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ID=67052256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821789277.7U Expired - Fee Related CN209053626U (en) | 2018-11-01 | 2018-11-01 | Multi-functional no longitudinal rib screw-thread steel |
Country Status (1)
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| CN (1) | CN209053626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396103A (en) * | 2020-03-05 | 2020-07-10 | 首钢长治钢铁有限公司 | Continuous rib anchor rod steel and preparation method thereof |
-
2018
- 2018-11-01 CN CN201821789277.7U patent/CN209053626U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396103A (en) * | 2020-03-05 | 2020-07-10 | 首钢长治钢铁有限公司 | Continuous rib anchor rod steel and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 271100 Changshanbei Road, Laiwu Economic Development Zone, Shandong Province, Zhangjiawa Xinxing East Road Patentee after: Jinan Yifeng Metal Products Co., Ltd. Address before: 271100 Changshanbei Road, Laiwu Economic Development Zone, Shandong Province, Zhangjiawa Xinxing East Road Patentee before: Laiwu Yifeng Iron and Steel Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190702 Termination date: 20191101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |