CN202300435U

CN202300435U - Telescopic joint of steel pipe concrete support

Info

Publication number: CN202300435U
Application number: CN 201120436397
Authority: CN
Inventors: 魏建军; 刘辉; 郭琳
Original assignee: 江苏建筑职业技术学院
Priority date: 2011-11-07
Filing date: 2011-11-07
Publication date: 2012-07-04

Abstract

The utility model discloses a joint capable of realizing telescopic movement of a steel pipe concrete support, belonging to the field of pipe joint. Two semicircular steel pipe sleeves with flanges are hooped on two support steel pipe joints, a preserved deflection between the joints is filled by plastic pipes wound to a ring shape, the sleeves are released and the plastic rings are taken off after the concrete is pumped and cured, a small-diameter concrete column is reserved at the core, and the small-diameter concrete column is deformed or crushed after the bracket is stressed to realize telescopic movement. The joint has the advantages of not affecting the continuous pumping of the whole support concrete. The joint is utilized on the steel pipe concrete support to effectively reduce the surrounding rock pressure applied on the support so as to prevent the instability and damage of the support.

Description

Steel pipe concrete bracket contractibility joint

Affiliated technical field

The utility model relates to a kind of joint, specifically is a kind of steel pipe concrete bracket contractibility joint, mainly is applicable to the connection of the steel pipe concrete bracket that uses under the mine, can under the pressure effect of ore deposit, produce and contract, realizes letting compression functions.

Background technology

What the bearing capacity of in Deep Mine, generally acknowledging at present was maximum is steel pipe concrete bracket, and this support is installed empty steel pipe support earlier, and joint area connects with sleeve or flange, and the back is concrete perfusion in pipe, after the sclerosis of pipe inner concrete, promptly forms steel pipe concrete bracket.But this support can't contract and let pressure, and drag rises to a certain degree support and damages easily in interacting with country rock.

Summary of the invention

In order to overcome the drawback that existing steel pipe concrete bracket can not contract, the utility model provides a kind of steel pipe concrete bracket contractibility joint, and this joint is easy to operate, neither influences the perfusion of support integral tube inner concrete, can realize contracting behind the support force again.

The utility model solves the technical scheme that its technical problem adopted: a kind of steel pipe concrete bracket contractibility joint; Comprise stand steel pipe, link together with bolt by two flanged (FLGD) semicircle sleeves and form sleeve that the sleeve lock ring is on stand steel pipe; Secretion has at least one loop plastic pipe between the joint of two stand steel pipe; In described ring-shaped plastics pipe, be installed with a reinforcing bar, and be filled with sand, the reinforcing bar two ends are wrapped in desires on the connector.

Method of operating is: before concrete perfusion in stand steel pipe; Embed the ring-shaped plastics pipe at place, steel pipe sections play movement in advance; Put on plain bar in the pipe and fill sand; When if Support joint needs deformation allowance bigger, then vertically stack a plurality of such plastics pipe rings or a long plastic pipe around many circles along steel pipe, steel bar end involves on stand steel pipe.Then with the sleeve cuff outside Support joint, the bolt sleeve of screwing is waled stand steel pipe.After the concreting, untie bolt and open sleeve, hold one of plain bar and take off the plastics pipe ring, promptly form the weakness band that has only middle concrete column.Again overlap upper bush, clamp flange bolt, chucking stand steel pipe.When support force to a certain degree, joint sleeve inner concrete post begins conquassation and breaks, support begins to contract, this moment can also through screwing of bolt limit contract or bolt loosen realize contracting moving.

The beneficial effect of the utility model is: in cuff two couplings, both reserved deflection, and do not influenced the whole concrete uninterrupted pumping of support again, and realized contracting behind the stent forming again, method is simple, and is easy to operate.On steel pipe concrete bracket, use some the utility model joints, can effectively reduce the pressure from surrounding rock that acts on the support, prevent the support unstable failure.

Description of drawings

Fig. 1 is the plan view of the utility model joint;

Fig. 2 is flanged (FLGD) semicircle sleeve constructional drawing;

Fig. 3 is the transverse cross-sectional view of joint;

Fig. 4 wears the reinforcing bar sketch map in the plastic pipe.

Among the figure: 1001. stand steel pipe, 1002. flanges, 1003. ring-shaped plastics pipes, 2001. sleeves, 3001. bolts, 4001, reinforcing bar.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Like Fig. 1, Fig. 2 and shown in Figure 3; Steel pipe concrete bracket contractibility joint comprises stand steel pipe 1001, sleeve 2001; Sleeve 2001 lock rings are on the junction of two stand steel pipe 1001, and sleeve 2001 is linked together with flange on it 1002 and bolt 3001 by two semicircle sleeves.Secretion has at least one ring-shaped plastics pipe 1003 between the joint of two stand steel pipe 1001, in described ring-shaped plastics pipe 1003, is installed with a reinforcing bar 4001, and is filled with sand, and it is on the steel pipe 1001 that the reinforcing bar two ends are wrapped in the desire connector.The diameter of ring-shaped plastics pipe 1003 is the diameter 1/3 of stand steel pipe 1001.

As shown in Figure 3, flanged plate is vertically welded in the axial edge of each semicircle pipe, makes the two halves pipe to after synthesizing a round tube shape, can be through the cross section size of the synthetic pipe of the adjustment of the bolt on the flange.

Like Fig. 3 and shown in Figure 4; With the plain bar 4001 of wearing a φ 6 in the ring-shaped plastics pipe 1003; In plastic pipe 1003, be full of sand then, be embedded among Fig. 1 gap between two sections stand steel pipe 1001 around the city ring-type then, the plastic pipe ring-type around the number of turns by the size decision of the reservation amount that contracts.Two sections stand steel pipe 1001 compresses plastics pipe ring 1003; For preventing 1003 slips of plastics pipe ring and being washed away by concrete; Reinforcing bar in the plastics pipe ring 1,003 4001 is stayed place's sufficient length; And the part that its two ends grow is wrapped in respectively on stand steel pipe 1001 joints of place, then firmly with flanged 1002 semicircle sleeve 2001 extruding, and the bolt 3001 of screwing.At this moment, the reinforcing bar 4001 of winding tightly is squeezed on the stand steel pipe 1001 by sleeve 2001, has both fixed plastics pipe ring 1003, can increase the clamping force of sleeve 2001 again as packing ring, can also effectively prevent concrete spillage herein.

Support is untied the bolt on the flange 1,002 3001 after concrete pumping and health sclerosis, holds 4,001 one of reinforcing bars and takes off plastics pipe ring 1003; The promptly surplus next minor diameter concrete column in junction; Again overlap upper bush 2001 then, clamp flange bolt 3001, chucking stand steel pipe 1001.When support force acquires a certain degree, joint inner concrete post conquassation distortion, support begins to realize contracting.After this can also adjust the support momentum that contracts through the degree of tightness of bolt.

Claims

1. steel pipe concrete bracket contractibility joint; Comprise stand steel pipe (1001); Link together with bolt by two flanged (FLGD) semicircle sleeves and to form sleeve (2001); Sleeve (2001) lock ring is characterized in that on the joining place of two stand steel pipe (1001): be filled with at least one loop plastic pipe (1003) in the space of two stand steel pipe (1001) joint, in described ring-shaped plastics pipe (1003), be installed with a reinforcing bar (4001); And being filled with sand, the reinforcing bar two ends are wrapped in desires on the connector.

2. according to strong request 1 described steel pipe concrete bracket contractibility joint, it is characterized in that: the diameter of described ring-shaped plastics pipe (1003) is 1/3 of stand steel pipe (a 1001) diameter.