CN2048110U - Equal strength extension anchoring bolt - Google Patents
Equal strength extension anchoring bolt Download PDFInfo
- Publication number
- CN2048110U CN2048110U CN 89202187 CN89202187U CN2048110U CN 2048110 U CN2048110 U CN 2048110U CN 89202187 CN89202187 CN 89202187 CN 89202187 U CN89202187 U CN 89202187U CN 2048110 U CN2048110 U CN 2048110U
- Authority
- CN
- China
- Prior art keywords
- rod
- anchor pole
- strong
- stretch
- head
- 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
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Abstract
The utility model relates to an equal-strength extendible anchor rod which is suitable for the support of the underground engineering. One end of the anchor rod is a sinistrorse twist or a snake-shaped improved structure, and the other end is rolling screws which are one stage greater than the diameter of the rod body. The purpose-made concave groove on the screw section is sheathed with high-strength sliding nuts and common nuts. The resin or the cements are used as anchoring agent. The utility model has the advantages of simple structure, convenient installation, low cost, and stable mechanical property; the intensity of each part is equal; the extendible amount comprises the extrusion of the high-strength sliding screws on the tail section and the integral plastic deformation of the rod body; the extendible amount can be changed through an adjusting mechanism.
Description
The utility model is applicable to underground construction, particularly is subjected to the underground engineering support that mining influence is serious or the soft distortion of country rock is bigger, belongs to the underground engineering support technical field.
At present, use maximum anchor poles in mine engineering, diameter is 16～18mm, and length is 1.6～1.8m, and anchor head adopts cement anchoring agent or resin anchoring agent bonding.Partly partly intensity is lower with anchor head for the body of rod tailing screw flight of the type anchor pole, only is 68～72% of body of rod strength of parent, can the amount of stretching be 1～3%.Squash type according to the introduction of domestic CN87 87202281U patent can be stretched anchor pole, and this anchor pole is to utilize body of rod pulling force with compression cylinder compression with extrude the sleeve contraction flow region, thereby makes anchor pole have certain anchored force, has certain stretched distance again.But this anchor pole has complex structure and does not wait strong shortcoming.According to the patent documentation introduction, 4378180 of U.S. Pat are to utilize the afterbody cone and the special-shaped supporting plate crimp of anchor pole, can stretch anchor pole and make.The anchor pole stretched (seeing nineteen eighty-three NewYork plate Anchoring in rook and soil one book) of professor Gerhart of Univ Colorado-Boulder USA design, reach though also adopted squeeze and destroy bar tail thread segment and can stretch purpose, but need the special-purpose body of rod and extraordinary screw shell, its structure and manufacturing process are very complicated, the cost costliness is difficult to reach practical purpose.
The purpose of this utility model is in order to overcome the existing shortcoming of above-mentioned anchor pole, to improve the anchor pole performance, enlarging the anchor pole scope of application and design.
Compare explanation on structure strong, can stretch anchor pole with reference to accompanying drawing.
Accompanying drawing 1a be have the grade of twist shape anchor head strong, can stretch anchor pole.
Accompanying drawing 1b be have the grade of snakelike anchor head strong, can stretch anchor pole.
Accompanying drawing 2a is the body of rod tail bit section of stretching assembling drawing.
Accompanying drawing 2b is body of rod tailing screw flight segment structure figure.
The utility model---a kind of grade is strong, can stretch anchor pole is that head (2), the other end of left-handed fried dough twist or snakelike improvement type forms for special run-out(of thread) (1) and back-up ring (8), supporting plate (6), high-strength sliding nut (4) and the setscrew nut (7) than the big one-level of body of rod diameter (example: body of rod diameter is 16mm, and bar tail screw thread specification is M18) by an end. While is at the following e of screw initial thread of the rolling special screw thread (1) of body of rod afterbody1=10mm place cuts into annular groove (5), groove length e to thread segment processing2=20～30mm, the degree of depth of groove equals the tailing screw flight working depth. High-strength sliding nut (4) is after heat treatment made with 45～No. 60 steel machining again, its height of nut H and groove e1Length match. Setscrew nut (7) is anchor pole general nut commonly used. Body of rod head is the straightway ι to back-up ring (8)=60～150mm from fried dough twist or snakelike section start, to change stress, increases the anchoring section reliability. Rod body material is made by the hot rolling garden steel of A3 garden steel or percentage elongation δ m=20～30%. The anchoring section binding agent adopts general resin anchoring agent or cement anchoring agent (3).
When application is installed, being inserted in supporting plate (6) at the long screw thread of body of rod afterbody in advance is screwed into high-strength sliding nut (4) in the annular groove (5) of screw thread, send into resin anchoring agent or cement anchoring agent (8) along anchor hole then, utilize paddling process or squeeze into method (being common Method for Installation) and send into the body of rod, supporting plate is pressed in the country rock surface tightly, location plain nut (7) is installed at last, with the stretched amount of control anchor pole. In order to prevent body of rod screw-thread rust, evenly be coated with the antirust butter of last layer at the screw thread place. The some of anchor pole can the amount of stretching be in surrouding rock deformation, when the anchor pole carrying strengthens, by high-strength sliding nut (4) from coil to coil squeeze and destroy body of rod tailing screw flight, until high-strength sliding nut (4) is crowded together mutually with location plain nut (7). Can the amount of stretching decide according to distance L between tailing screw flight length and high-strength sliding nut and the setscrew nut, L=100～300mm, another can the amount of stretching be that country rock continues distortion partly, anchor pole load continues to increase, finished by the whole plastic deformation of the equicohesive structure assurance of the body of rod body of rod, its maximum deformation quantity can the amount of stretching be about 100～200mm about 10%, anchor pole always can the amount of stretching reach 200～500mm. If it is little to run into surrouding rock deformation, when requiring anchor pole can the amount of stretching to be 100～150mm, then can adopt short thread etc. can stretch by force anchor pole, (reach is 80～100mm), cancels the groove on high-strength sliding nut and the tailing screw flight namely to shorten body of rod tailing screw flight length. It can the amount of stretching by etc. the whole plastic deformation of the strong body of rod and finishing. It can satisfy the requirement of the most roadway support in down-hole, and can replace common bolt, improves the common bolt bearing capacity or reduce one-level body of rod diameter under same bearer power, reaches the purpose of saving steel.
In a word, the utility model is compared with anchor pole in the past, has simple in structurely, and installation and processing is convenient, and stable mechanical property can the amount of stretching can be regulated by actual needs, and manufacturing cost is lower and save steel, and material is fully used.
Claims (5)
1, a kind of be applicable to the mine engineering supporting etc. strong, can stretch anchor pole, form by fried dough twist or snakelike head (2), the body of rod that can stretch afterbody (1), supporting plate (6), nut (7) and resin or cement anchoring agent (3), it is characterized in that body of rod afterbody (1) adopts rolled threaded than the big one-level of body of rod diameter, body of rod head (2) adopts left-handed fried dough twist of improvement type or snakelike anchor head.
2, according to claim 1 etc. strong, can stretch anchor pole, the reach that it is characterized in that body of rod afterbody (1) is 200～500mm, at the e of screw initial thread place
1The position of=10mm cuts into annular groove (5), groove length e
2=20～30mm, the annular groove degree of depth is rolled threaded screw thread working depth.
3, according to claim 1 etc. strong, can stretch anchor pole, it is characterized in that adopting high-strength sliding nut (4), after heat treatment make its height H and groove length e again by 45～No. 60 steel machining
2Match.
4, according to claim 1 etc. strong, can stretch anchor pole, it is characterized in that body of rod head (1) from fried dough twist or snakelike section start to a straightway ι being arranged, ι=60～150mm between the back-up ring (8).
5, according to claim 1 etc. strong, can stretch anchor pole, it is characterized in that rod body material made by the hot rolling garden steel of A3 garden steel or elongation per unit length δ=20～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202187 CN2048110U (en) | 1989-03-03 | 1989-03-03 | Equal strength extension anchoring bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202187 CN2048110U (en) | 1989-03-03 | 1989-03-03 | Equal strength extension anchoring bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2048110U true CN2048110U (en) | 1989-11-22 |
Family
ID=4859972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202187 Expired - Lifetime CN2048110U (en) | 1989-03-03 | 1989-03-03 | Equal strength extension anchoring bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2048110U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359131C (en) * | 2004-03-22 | 2008-01-02 | 中国矿业大学 | Constrained inner wall treatment and method of preventing well wall from broken |
| CN105863294A (en) * | 2016-05-31 | 2016-08-17 | 浙江大学 | Composite anchor rod device and method for fastening cross section by using anchor rod device in anchoring manner |
| CN106013833A (en) * | 2016-05-31 | 2016-10-12 | 浙江大学 | Anchor rod device and method for reinforcing section through anchoring of anchor rod device |
| CN106049893A (en) * | 2016-05-31 | 2016-10-26 | 浙江大学 | Extendable anchor rod device and method for reinforcing section through anchoring of anchor rod device |
-
1989
- 1989-03-03 CN CN 89202187 patent/CN2048110U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359131C (en) * | 2004-03-22 | 2008-01-02 | 中国矿业大学 | Constrained inner wall treatment and method of preventing well wall from broken |
| CN105863294A (en) * | 2016-05-31 | 2016-08-17 | 浙江大学 | Composite anchor rod device and method for fastening cross section by using anchor rod device in anchoring manner |
| CN106013833A (en) * | 2016-05-31 | 2016-10-12 | 浙江大学 | Anchor rod device and method for reinforcing section through anchoring of anchor rod device |
| CN106049893A (en) * | 2016-05-31 | 2016-10-26 | 浙江大学 | Extendable anchor rod device and method for reinforcing section through anchoring of anchor rod device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |