CN201739289U

CN201739289U - Recoverable expansion bolt

Info

Publication number: CN201739289U
Application number: CN2010202676321U
Authority: CN
Inventors: 孙文; 岳大昌
Original assignee: CHENGDU SIHAI GEOTECHNICAL ENGINEERING Co Ltd
Current assignee: CHENGDU SIHAI GEOTECHNICAL ENGINEERING Co Ltd
Priority date: 2010-07-22
Filing date: 2010-07-22
Publication date: 2011-02-09
Anticipated expiration: 2020-07-22

Abstract

The utility model relates to a recoverable expansion bolt, which belongs to an anchoring tool, in particular to the anchoring tool for building a scaffold when an exposed surrounding-rock side slope is consolidated. The recoverable expansion bolt comprises a bolt rod and has the key technology that a spring, a spring backing ring, an expansion shell and a jacking sleeve pipe are sequentially sleeved on the outer wall of the bolt rod, the tail end of the bolt rod is connected with a connecting bar, and the connecting bar is contacted with the jacking sleeve pipe. Compared with the prior art, the utility model has the advantages that: the recoverable expansion bolt has large diameter and long rod, can be recovered after being used, is the anchoring tool, does not need other materials in anchoring and is quite convenient to use.

Description

The recoverable EXPANSION ANCHOR BOLTS

Technical field:

The recoverable EXPANSION ANCHOR BOLTS belongs to a kind of anchoring instrument, sets up the anchoring instrument of scaffold during in particular for exposed country rock slope reinforcement.

Background technique:

When rock matter high slope is reinforced, all be the scaffold of setting up from bottom to top in the past,, generally all used the vertical frame pipe of 2～3 rows, and caused the consumption of frame pipe quite big in order to make the scaffold safety and stability.Use the consumption that EXPANSION ANCHOR BOLTS just can reduce the frame pipe in a large number, only need to satisfy the safe construction needs once the vertical frame pipe of row.But now the diameter of the EXPANSION ANCHOR BOLTS of selling on the market is little, bar short, with after can not reclaim.

Summary of the invention:

Problem to be solved in the utility model is exactly to provide at above deficiency that a kind of diameter is big, bar long, with the recoverable EXPANSION ANCHOR BOLTS in back.Its technological scheme is as follows:

It has tightening latch, and its key technology is at the outer wall of tightening latch pocketed springs successively, spring backing ring, the shell and hold out against sleeve pipe of expanding, and is connected with pitman at the tail end of tightening latch, pitman with hold out against sleeve pipe and contact.

The beneficial effect that compared with prior art the utlity model has is:

Recoverable EXPANSION ANCHOR BOLTS diameter is big, bar is long, with after can reclaim, it is a kind of anchoring instrument, does not need other materials during anchoring again, and is very easy to use.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model user mode figure.

Embodiment:

Referring to Fig. 1, the utlity model has tightening latch 1, its key technology is that the external diameter of tightening latch 1 reduces tapered by front end gradually to the rear end at the outer wall of tightening latch 1 pocketed springs 2 successively, spring backing ring 3, the shell 4 and hold out against sleeve pipe 5 of expanding; The shell 4 that expands has 3, evenly is sleeved on the outer wall of tightening latch 1, and the shell 4 that expands thickens from the front end to the rear end gradually, and the longitudinal section is thick trapezoidal in the thin rear end of front end, bloated shell 4 close fit of the tightening latch 1 of cone-shaped and trapezoid shaped.Tail end at tightening latch 1 has been attacked outside thread, connects the pitman 6 that an end has internal thread by outside thread, the engagement of the internal thread of the outside thread of tightening latch 1 and pitman 6, pitman 6 with hold out against sleeve pipe 5 and contact.

Form with the Spring Steel Wire coiling of upper spring 2 by φ 4; Holding out against sleeve pipe 5 is formed by the cutting of φ 48 steel pipes; Pitman 6 is by φ 48 round steel car systems.

Its working principle is:

During off working state, spring 2 is pushing away bloated shell 4 outer moving, and the anchoring section external diameter of assemblying body that makes the recoverable EXPANSION ANCHOR BOLTS is convenient to push in the hole less than the petrosal foramen diameter.When propelling movement puts in place, pitman 6 is screwed on the tightening latch 1, along with pushing ahead of pitman 6, hold out against sleeve pipe 5 force expand shell 4 upwards (lining) move, this moment, spring was compressed.(front end) thin (rear end) down is thick on the bloated shell 4 of cause, the external diameter of tightening latch 1 is reduced to the rear end gradually by front end, the longitudinal section is front wide and rear narrow cone-shaped, when pitman is fastening, driving tightening latch moves outward, promote to hold out against sleeve pipe simultaneously and move forward, the external diameter that forces the EXPANSION ANCHOR BOLTS anchoring section that relatively moves of tightening latch and bloated shell increases, and causes bolt anchoring in petrosal foramen.

Unclamp pitman 6 after using up, make it and hold out against the disengaging of sleeve pipe 5 tail ends, when pitman 6 front ends leave when holding out against sleeve pipe 5 certain distances, impact the pitman outer end with hammer, at this moment anchoring section is loosening, tightening latch 1 moves forward, the shell 4 that expands unclamps, and the spring 2 of savings energy promotes bloated shell 4 times (outward) and moves the anchoring section reduced diameter, return to the state before the recoverable EXPANSION ANCHOR BOLTS is installed, can in the hole, EXPANSION ANCHOR BOLTS be taken out.

When using the utility model, as shown in Figure 1 and Figure 2, on exposed scar more than the IV class of distance ground 1.5m eminence, press the vertical frame tube pitch of scaffolding usually and bore the dark petrosal foramen of 50～80cm, aperture φ 50, the rock dust in the pore-forming after-blow is portalled.Turn pitman 6 with pipe wrench, force to hold out against sleeve pipe 5 and move forward, pitman 6 is progressed in the petrosal foramen, thereby realize anchoring, will all install this EXPANSION ANCHOR BOLTS in borings of all first rows.On the pitman 6 of recoverable EXPANSION ANCHOR BOLTS, set up and, on domatic suitable distance, erecting vertical frame pipe 8, be connected with the vertical frame pipe of level one by one then again with fastener locking transverse strands pipe 7 (when available in short-term pipe of pitman spreading).Set up first layer, set up the second layer by this program again, by that analogy until setting up predetermined altitude.

When tearing frame open, at first unclamp pitman 6, when pitman 6 front ends leave when holding out against sleeve pipe 5 certain distances, impact the pitman outer end with hammer, at this moment anchoring section is loosening, under the pushing of spring 2, EXPANSION ANCHOR BOLTS resets, and can take out EXPANSION ANCHOR BOLTS, just can successively remove all frame pipes by that analogy.

Claims

1. recoverable EXPANSION ANCHOR BOLTS, has tightening latch (1), it is characterized in that at the outer wall of tightening latch (1) pocketed springs (2) successively, spring backing ring (3), the shell (4) and hold out against sleeve pipe (5) of expanding, be connected with pitman (6) at the tail end of tightening latch (1), pitman (6) with hold out against sleeve pipe (5) and contact.

2. according to the described recoverable EXPANSION ANCHOR BOLTS of claim 1, it is characterized in that tightening latch (1) tail end attacked outside thread, pitman (6) one ends have been attacked internal thread, and the internal thread of the outside thread of tightening latch (1) and pitman (6) is connected with a joggle.

3. according to the described recoverable EXPANSION ANCHOR BOLTS of claim 1, it is characterized in that the external diameter of tightening latch (1) is reduced to the rear end gradually by front end, tapered.

4. according to the described recoverable EXPANSION ANCHOR BOLTS of claim 1, the shell (4) that it is characterized in that expanding has 3, evenly is sleeved on the outer wall of tightening latch (1), and the shell (4) that expands thickens from the front end to the rear end gradually, and the longitudinal section is thick trapezoidal in the thin rear end of front end.