CN101250875B

CN101250875B - Pawl type self-locking anchor rod

Info

Publication number: CN101250875B
Application number: CN200810058283XA
Authority: CN
Inventors: 李心一; 戴晓江; 李昱东
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2008-04-15
Filing date: 2008-04-15
Publication date: 2010-10-13
Anticipated expiration: 2028-04-15
Also published as: CN101250875A

Abstract

The invention discloses a pawl-type self-locking anchor and a cable. The invention relates to a component device of an anchor, in particular to a pawls-type self-locking anchor solid component device, which belongs to the project field of geotechnical, wherein a lantern ring is fixed on an anchor body, the outer wall of the lantern ring is hinged with a series of pawl blocks, the pawl blocks are located in a pawl slot on the lantern ring and are equipped with a spring which is outward pushed, and a protective cased pipe is sleeved outside the lantern ring in the initial status of installment.As the unidirectional constraint working principle of a pawl mechanism, the installment of the anchor is very convenient, when an anchorage body produces deformation or has a deformation trend at an axial direction, the frictional resistance between the anchor and the wall of an anchor eye of the anchorage body is increased, thereby increasing an anchorage force, and the pawl-type self-locking anchor and a cable is particularly suitable for anchoring of hard rock.

Description

Pawl type self-locking anchor bar

Technical field

The present invention relates to a kind of assembly apparatus of anchor pole, particularly a kind of pawl type self-locking anchoring assembly device belongs to the geotechnical engineering field.

Background technology

In the rock anchorage technology, anchor pole can be rock mass deformation and provides axially and radial constraint power.Existing rock mass anchor pole mainly is divided into two classes: the one, and bottom, nearly hole anchor head anchoring rod, the 2nd, full body of rod anchoring rod.For providing of initial anchored force, under first kind of mode condition,, less by the anti-pulling intensity that the frictional force between anchor head and rock mass provides because anchoring section is shorter; Under second way condition, because full bar Duan Junyu rock mass closely contacts, the available bigger anti-pulling intensity of frictional force between the body of rod and rock mass (bonded anchor pole need experience certain hour just can reach respective strengths), but no matter be wherein representative pipe-seam type anchor rod, or bonded and expansion type roof bolt, its mounting process is all complicated, especially last under the anchoring situation, mostly need special installation apparatus.In addition, no matter be the first kind or the second class anchor pole, duration of work after finishing is installed, if rock mass does not only have under the situation of axial deformation radially the having obviously distortion of anchor pole, its work anchored force can not improve, its reason is that the frictional resistance between anchor pole and rock mass anchor hole wall can not increase that (anchored force is mainly determined by the frictional resistance between the anchor bar body strength of materials and anchor pole and rock mass anchor hole wall, and rod body material can reach requirement easily by selecting for use of respective material, therefore, the key influence factor of anchored force just concentrates on the size of the frictional resistance between anchor pole and rock mass anchor hole wall).

Summary of the invention

Technical problem to be solved by this invention provides a kind of pawl type self-locking anchor bar, it does not need special installation apparatus, it is very convenient to install, no matter by anchoring body anchor pole axially or radially deform or during deformation tendency, all can increase the frictional resistance between anchor pole and rock mass anchor hole wall.

The present invention solves the scheme that its technical problem adopts: the leading section of bolt body is fixed with the collar; the outer wall of the collar is hinged with a series of ratchet pieces; the ratchet piece is arranged in the ratchet tank on the collar and is equipped with to the spring of extrapolating, and is with protective casing outside the original state collar of packing into.

Concrete technical scheme of the present invention also comprises: fixing two above collars on the bolt body, having annular tank on the collar, a series of ratchets are packaged on ratchet piece retainer ring, snap in the annular tank again.Every collar is provided with the annular tank that the ratchet piece is installed more than two.Ratchet piece more than 3 is set on every ratchet piece retainer ring; The constraint direction of ratchet piece is staggered on bolt body is axial; Have collar fixing hole on the collar, the bolt body and the collar are by this hole bolt.

The invention has the beneficial effects as follows: one, it does not need special equipment and installs easily, only needs during installation that anchor pole is pushed anchor hole and gets final product, and its push-on force is only close with the anchor pole own wt, and because the effect of detent mechanism makes the anchor pole automatic locking be fixed in the anchor hole; Its two, at the anchor pole duration of work, the same because effect of detent mechanism, even rock mass all can increase the frictional resistance between anchor pole and rock mass anchor hole wall only axially the deforming or deformation tendency of anchor pole, thereby the increase anchored force is specially adapted to the anchoring of hard rock.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic appearance of the present invention.

Among the figure, each label is followed successively by: the collar 1, bolt body 2, ratchet piece 3, ratchet piece 4, thrust spring 5, shaft hole 6, thin-walled protective casing 7, by anchoring body 8, ratchet tank 9, collar fixing hole 10, annular tank 11, ratchet piece retainer ring 12.

The specific embodiment

As shown in Figure 1, 2, a plurality of

ratchet pieces

3 or 4 are formed a ratchet group by being installed on the ratchet piece retainer ring 12, (for ease of assembling, can adopt the opening retainer ring, go into ratchet is packaged from the ring opening part), the number of a contained ratchet piece of ratchet group is not less than 3, concrete numerical value depends on that ring is gone up installing space size and ratchet block of material and by the hardness and the intensity of anchoring body material (as rock mass etc.), if hardness and intensity height, quantity can be lacked, otherwise quantity can be many; The ratchet group is embedded in the annular tank 11 on the collar 1 again, two above ratchet groups can be installed on the collar 1, its number is on being decided by the integrality degree of anchoring body, and generally speaking, when better, quantity can be lacked by the integrality of anchoring body, otherwise quantity can be many; The length of the collar 1 can be the anchor pole total length, also can be as short as only to hold a ratchet group; The installation direction of ratchet group also is with good conditionsi, at least to there be one by shown in Figure 1 in the anchor pole leading section, be labeled as the ratchet group (being called export-oriented constraint ratchet group) of the represented installation direction of 3 ratchet piece, so that basic installation pulling capacity to be provided, if adopt under the condition of traditional bolthole mill shoe, may not request on the collar 1 rightabout ratchet group (being called interior to constraint ratchet group) is installed, but will lose, only realize basic integral body constraint along the function of anchor pole axial segmentation constraint.

As Fig. 1,2; when anchor pole is installed; the extroversion constraint ratchet group that is positioned at leading section is placed outside the thin-walled protective casing 7; being beneficial to anchor pole shifts onto at the bottom of the hole behind the position; thin-walled protective casing 7 is extracted smoothly, and the whole ratchet groups on the while release lever are because the effect of thrust spring 5; each ratchet piece closely contacts with hole wall, makes anchor pole firmly be stranded in the hole (Fig. 2) and to being played anchorage effect by anchoring body.Pawl type self-locking anchor bar structure shown in the present embodiment also can be used on the anchor cable.

Claims

1. pawl type self-locking anchor bar; it is characterized in that: be fixed with the collar on the bolt body; the outer wall of the collar is hinged with a series of ratchet pieces, and the ratchet piece is arranged in the ratchet tank on the collar and is equipped with to the spring of extrapolating, and is with protective casing outside the original state collar of packing into.

2. pawl type self-locking anchor bar according to claim 1 is characterized in that: fixing two above collars on the bolt body, having annular tank on the collar, a series of ratchets are packaged on ratchet piece retainer ring, snap in the annular tank again.

3. pawl type self-locking anchor bar according to claim 2 is characterized in that: every collar is provided with the annular tank that the ratchet piece is installed more than two.

4. pawl type self-locking anchor bar according to claim 3 is characterized in that: the ratchet piece more than 3 is set on every ratchet piece retainer ring; The constraint direction of ratchet piece is staggered on bolt body is axial; Have collar fixing hole on the collar, the bolt body and the collar are by this hole bolt.