CN201884039U - Three-sided longitudinal rib-less deformed steel bar metal bolt body - Google Patents
Three-sided longitudinal rib-less deformed steel bar metal bolt body Download PDFInfo
- Publication number
- CN201884039U CN201884039U CN2010206500450U CN201020650045U CN201884039U CN 201884039 U CN201884039 U CN 201884039U CN 2010206500450 U CN2010206500450 U CN 2010206500450U CN 201020650045 U CN201020650045 U CN 201020650045U CN 201884039 U CN201884039 U CN 201884039U
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- CN
- China
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- screw thread
- thread
- bolt body
- screw
- steel bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a three-sided longitudinal rib-less deformed steel bar metal bolt body, which comprises a deformed steel bar metal bolt body, a screw thread of the bolt body is a broken helical line milled by a three-high mill, the three sides of which are raised, the helical line is a left-hand or right-hand single helical line, the thread form of the screw thread is a triangular screw thread, a rectangular screw thread, a trapezoidal screw thread or a sawtoothed screw thread, longitudinal ribs do not exist between the screw threads, and the thread pitch of the screw thread is (4-6) plus or minus 0.3mm. Under the condition of the same anchoring agent and the same anchorage length, the anchorage force of the bolt body is increased by 10 to 20 percent in comparison with the anchorage force of other types of bolts. The bolt body can be mechanically and quickly mounted, and can realize end anchoring, lengthened anchoring and full anchoring. The bolt body can be used for the high-strength, permanent roadway support of various projects, such as coal mine projects, railway projects and hydroelectric projects.
Description
Technical field
The utility model relates to the support anchor rod body that a kind of coal mine roadway and underground engineering wall rock are used.
Background technology
At present, the supporting of China's coal-mine underworkings generally adopts the two sides not have the vertical rib screw-thread steel metal anchors body of rod, because anchor bar body is to adopt two two-sided screw threads of the rolling intermittence that forms of roller roll mill, thread pitch is big, the effective contact area of screw thread is little, anti-seismic performance is low, and anchor pole is loosening easily, the poor reliability of anchoring.The threaded line spacing distance that forms in the rolling process is big, has reduced lever strength and screw thread contact area, causes the anchored force deficiency.
The utility model content
The purpose of this utility model is not have the deficiency of the vertical rib screw-thread steel metal anchors body of rod in order to overcome existing two sides, and proposing a kind of three does not have the vertical rib screw-thread steel metal anchors body of rod.
The technical solution of the utility model is, it comprises the screw-thread steel metal anchors body of rod, it is characterized in that, the screw thread of anchor pole is the interrupted shape helix by rolling three projectioies that form of three-high mill, helix is the single-wire helix line of left-handed or dextrorotation, the tooth form of screw thread is triangle thread, rectangular thread, trapezoidal thread or saw-tooth thread, does not have vertical rib between screw thread and the screw thread, and the pitch of screw thread is (4-6) ± 0.3mm.
The utlity model has following advantage: owing to adopt rolling three the interrupted helixes of three-high mill, realized that fine pitch is rolling, and the threaded line spacing distance that forms is little, thread profile is long-pending big, so just the anchor pretightning force is big, shockproof, anti-loosening, permanent anchored force is big.Under the anchoring agent situation identical, than the anchor-holding force of anchor bolt raising 10-20% of other type with anchorage length.The mechanization Fast Installation can be realized, anchor, lengthening anchor and full anchor can be held.Can be used for the permanent roadway support of high strength of all kinds of engineerings such as colliery, railway, water power.
The utility model is carried out the MT146.2-2002 standard.
Description of drawings
Fig. 1 is the front view of the utility model anchor bar body,
Fig. 2 is the utility model anchor bar body profile,
Fig. 3 is the utility model anchor bar body form of thread enlarged drawing.
Among the figure: 1-anchor bar body, 2-screw thread.
The specific embodiment
The utility model as shown in Figure 1, rolling screw thread 2 is all arranged on the total length of anchor bar body 1, wherein screw thread 2 is the interrupted shape helixes by rolling three projectioies that form of three-high mill, section as shown in Figure 2, helix is the single-wire helix line of left-handed or dextrorotation, and the tooth form of screw thread is wherein a kind of of triangle thread, rectangular thread, trapezoidal thread or saw-tooth thread
Fig. 3 only illustrates a kind of form of trapezoidal thread.There is not vertical rib between screw thread and the screw thread.
When screw-thread steel diameter d 1=16mm, the high h=1.4 ± 0.2mm of rib, rib spacing (pitch) L=4 ± 0.3mm.
When screw-thread steel diameter d 1=18mm, the high h=1.6 ± 0.2mm of rib, rib spacing (pitch) L=4 ± 0.3mm.
When screw-thread steel diameter d 1=20mm, the rib height
Rib spacing (pitch) L=6 ± 0.3mm.
When screw-thread steel diameter d 1=22mm, the rib height
Rib spacing (pitch) L=6 ± 0.3mm.
Claims (1)
1. one kind three are not had the vertical rib screw-thread steel metal anchors body of rod, it comprises the screw-thread steel metal anchors body of rod, it is characterized in that, the screw thread of anchor pole is the interrupted shape helix by rolling three projectioies that form of three-high mill, helix is the single-wire helix line of left-handed or dextrorotation, the tooth form of screw thread is triangle thread, rectangular thread, trapezoidal thread or saw-tooth thread, does not have vertical rib between screw thread and the screw thread, and the pitch of screw thread is (4-6) ± 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206500450U CN201884039U (en) | 2010-06-25 | 2010-11-18 | Three-sided longitudinal rib-less deformed steel bar metal bolt body |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020251395 | 2010-06-25 | ||
| CN201020251395.X | 2010-06-25 | ||
| CN2010206500450U CN201884039U (en) | 2010-06-25 | 2010-11-18 | Three-sided longitudinal rib-less deformed steel bar metal bolt body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884039U true CN201884039U (en) | 2011-06-29 |
Family
ID=44181579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206500450U Expired - Fee Related CN201884039U (en) | 2010-06-25 | 2010-11-18 | Three-sided longitudinal rib-less deformed steel bar metal bolt body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2010
- 2010-11-18 CN CN2010206500450U patent/CN201884039U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20161118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |