CN2049263U

CN2049263U - Centre press fitting means of long screw drilling machine

Info

Publication number: CN2049263U
Application number: CN 89200369
Authority: CN
Inventors: 杨雁; 林籍
Original assignee: BEIJING MECHANIZED CONSTRUCTION Co
Current assignee: BEIJING MECHANIZED CONSTRUCTION Co
Priority date: 1989-01-11
Filing date: 1989-01-11
Publication date: 1989-12-13

Abstract

The utility model relates to a centre mud jacking device of long screw drilling machine which is a rebuilt special device in the foundation construction of the ground base to the ZKL-type long screw drilling machine. The hanging drill below the power device of the drilling machine comprises a swivel joint, a drill rod with a core pipe and a drill bit with a one-way mud output valve. A stirrer of the device can travel while stirring on the mud box. The utility model is used in the construction of the bad soil layer, which can effectively prevent the hole collapsing, the decrease of the engineering quality and the decrease of the construction progress.

Description

Centre press fitting means of long screw drilling machine

The utility model relates to the foundation basic construction technical field.

The utility model is made up of slurry-storing box of ZKL full screw earth auger, slush pump, belt stirrer etc.The drilling tool that is hung under the auger power set is constituted by the long screw drill rod of swivel coupling, band center mud jacking core pipe and with the drill bit of unidirectional slurry-supplying valve.Two joint drilling rod junctions are pressed with rubber seal.The agitator of four road wheels is housed on the slurry-storing box in device, can back and forth walks on the guide rail of casing, amount of agitation is big, compact conformation.

By the 1986-08-12 of Ministry of Urban and Rural Construction and Environmental Protection issue, stipulate among the full screw earth auger standard JJ42-86 that 1986-10-01 implements that full screw earth auger directly hangs auger stem and drill bit under power set.In standard JJ42-86, drilling rod, drill bit are common spiral drills, and their form and position tolerance has not just been stipulated in the requirement of special construction, has stipulated some length, thickness, apparent size.

We are improved the drilling tool that standard full screw earth auger power set are hung down, are equipped with the slurry-storing box of slush pump and belt stirrer again, have formed full screw earth auger center squeezing unit.

This device is to do the device that stake is adopted in bad soil layer.When drilling rod gets into projected depth, slush pump in the slurry-storing box is delivered in the mud jacking core pipe at drilling rod center by slush pump, be pressed into the hole, pressure slurry retaining wall from drill bit bottom with unidirectional slurry-supplying valve, purpose is to put into the placing of concrete conduit behind the pore-forming, under water the placing of concrete pile.Adopt this device, small investment efficient height, the concrete quality of stake is good.

Fig. 1 is this schematic representation of apparatus.

Fig. 2 is swivel coupling figure.

Fig. 3 is tool joint figure.

Fig. 4 is unidirectional slurry-supplying valve figure.

Fig. 5 is the slurry-storing box schematic diagram of belt stirrer.

Fig. 6 is the side diagrammatic sketch of Fig. 5.

Fig. 7 is a N-N sectional view among Fig. 5.

We realize by following approach, see Fig. 1 for details.Hanging power set 3 on the guide rail 2 of auger 1, under it, connecting swivel coupling 4, the visible Fig. 2 of its design feature.Below swivel coupling 4, connecting and having center mud jacking core pipe 27(Fig. 3) drilling rod 5, the visible Fig. 3 of its flange 6 ways of connecting.In drilling rod 5 bottoms drill bit 7 is housed, drill bit 7 is provided with unidirectional slurry-supplying valve 31(Fig. 4).The stock inlet of swivel coupling 4 is linked to each other by the outlet of flexible pipe 8 with slush pump 9, and slush pump 9 is controlled the pressure of pressing grouting by pressure regulator valve 10.Agitator 11 is provided with roller 12, and roller 12 is back and forth walked on the track 13 of slurry-storing box 14 and seen Fig. 5.

Swivel coupling is transfer torque both, bears the pulling capacity and the pressure of drilling rod again, and it is formed as shown in Figure 2, by revolution overcoat 21, and core bar 22, lower cover 15, three road asbestos strip of paper used for sealings 16, last three road asbestos strip of paper used for sealings 17, upper press cover 18, dust cap 19 and stop link rod 20 compositions down.Core bar 22 upper ends with power set output shaft be connected, the lower end is connected with the flange 6 of drilling rod.When drilling rod rotated, revolution overcoat 21 slided up and down and can not rotate along guide rail 2 only by the effect of stop link rod 20.Slurries enter cavity 24 by the stock inlet that does not rotate, and the center mud jacking core pipe 27 that injects drilling rods 5 by two holes 23 of core bar 22 is at the bottom of the hole then.Because respectively there is asbestos strip of paper used for sealing 16,17 and fastening by the bolt 25 on the last lower cover at revolution overcoat 21 two ends, can adjust the pressure to strip of paper used for sealing at any time, make it keep sealing, the top is provided with dust cap 9.

Up and down two the joint drilling rods 5 the connection place, its flange 6 is connected with packing ring 29 by bolt 28.Also be provided with two keys 30 in order to transmit big moment of torsion end face flange 6.Be to guarantee the sealing of center mud jacking core pipe 27, be pressed with rubber seal 26(Fig. 3) at the end face of flange 6 seams.

Drill bit 7 bottoms are provided with a unidirectional slurry-supplying valve 31, caulking gum 32 is fixed on the flange 33 that has seam tightly by pressing plate 34, stud with baffle plate 35 on the caulking gum 32, caulking gum 32 can only outwards be opened, be stuck on the seam end face of flange 33 by baffle plate 35 when inwardly moving, realized that slurries can outflow, the inaccessiable purpose of earth.(see figure 4)

Guide rail 13 is equipped with on the top of slurry-storing box 14, and the four rolling 12 of slurry agitator 11 is walked on guide rail 13.The storage slurry amount of slurry-storing box is enough to satisfy the demand of big consumption.

Building site, building science academy of the Ministry of Construction the 801st scientific research building, underground is seen underground water for 2 meters, is exactly argillic horizon down again.Full screw earth auger creeps into very difficult, and foundry loam blocks drill bit, drilling rod, and labour intensity is very big, can only bore the hole of 800 millimeters of dark 12 rice diameter φ in one day.Adopt the construction of this device can bore the hole of 800 millimeters of dark 12 rice diameter φ more than 6 every day, and prevent the hole that collapses effectively.Reduce construction costs, guaranteed construction quality and programming.

Claims

1, a kind of full screw earth auger center squeezing unit directly hangs auger stem and drill bit under power set, it is characterized in that:

A. the drilling tool that is hung under power set is formed by the drilling rod of swivel coupling, belt carcass pipe and joint thereof with the drill bit of unidirectional slurry-supplying valve;

B. be equipped with the slurry-storing box of slush pump and belt stirrer again.

2, the full screw earth auger center squeezing unit according to claim 1 is characterized in that swivel coupling is made up of revolution overcoat, core bar, upper press cover, lower cover, dust cap, stop link rod and asbestos strip of paper used for sealing.

3,, it is characterized in that the joint of two joint drilling rods is made up of flange, bolt, key and rubber seal according to the full screw earth auger center squeezing unit of claim 1.

4,, it is characterized in that drill bit is provided with that caulking gum tightly is fixed on the unidirectional slurry-supplying valve of being formed on the seam of flange by pressing plate by studding with baffle plate on the caulking gum according to the full screw earth auger center squeezing unit of claim 1.

5, according to the full screw earth auger center squeezing unit of claim 1, it is characterized in that being equipped with on the slurry-storing box slurry agitator, this agitator is equipped with roller can walk on the guide rail on slurry-storing box top.