CN202706971U

CN202706971U - Bit fisher

Info

Publication number: CN202706971U
Application number: CN 201220387709
Authority: CN
Inventors: 王麟; 张向福; 李学忠; 李延胜; 张国华; 刘超; 金园苑
Original assignee: China Railway Sixth Group Co Ltd; Tianjin Railway Construction Co Ltd of China Railway Sixth Group Co Ltd
Current assignee: China Railway Sixth Group Co Ltd; Tianjin Railway Construction Co Ltd of China Railway Sixth Group Co Ltd
Priority date: 2012-08-07
Filing date: 2012-08-07
Publication date: 2013-01-30
Anticipated expiration: 2022-08-07

Abstract

The utility model discloses a bit fisher, which comprises a substrate, a connection port, two cylinders and two grabs, wherein the substrate forms a bar; the connection port is arranged at the middle part of the surface of the substrate; a connection hole respectively penetrates through two lateral walls; the two cylinders are respectively arranged at the surface of the substrate at the outer side of the connection port; one end of a cylinder body of each cylinder is hinged with the surface on the substrate near the connection port; the outer end of a piston rod at the other end is hinged with the upper end of each grab; an oil pipe interface is respectively formed at two ends of the cylinder body; two grabs are respectively arranged at two ends of the substrate; the middle part of each grab is hinged with an outer end part of the substrate, and a bill is formed at the lower end. According to the bit fisher disclosed by the utility model, the connection port is designed into the shape same as that of the upper end of the bit on a rotary drilling machine, so that a bit fishing operation can be carried out as long as the lower end of a drill stem is connected with the connection port once the bit falls off on the bottom part of a pile hole due to a fault. Therefore, the bit fisher is very convenient and practical, and the rotary drilling machine can be utilized to drill, thus, the construction speed can be improved, and the construction cost can be reduced.

Description

Bit-fishing unit

Technical field

The utility model belongs to the civil engineering equipment technical field, particularly relates to a kind of bit-fishing unit.

Background technology

Bored pile means at engineering site and form a stake hole by the means such as machine drilling, steel pipe soil compaction or manpower excavation in foundation soil, and places reinforcing cage, concrete perfusion and the stake of making in the stake hole.At present machine drilling often uses Spiral digging machine to carry out, and the drilling rod front portion on the Spiral digging machine is connected with drill bit, utilizes drill bit that foundation soil is impacted and forms a hole.But, such problem appears in work progress sometimes: when foundation soil is harder, drill bit may separate with drilling rod because the torsion that is subject to is excessive, thereby drill bit is fallen at the bottom of the hole, because the hole depth of this moment may reach 50-60 rice, so drill bit can't be taken out from the stake hole in this case at all, at this moment the mode that can only use Churn drill instead continues to form the eyelet of bottom, will affect like this construction speed of postorder, but utilize in some cases Churn drill also can't construct again, at this moment this hole can only be destroyed, will increase construction cost thus.

Summary of the invention

In order to address the above problem, the purpose of this utility model is to provide a kind of can take out drill bit the bit-fishing unit that speed of application is fast, cost is low smoothly from the stake hole.

In order to achieve the above object, the bit-fishing unit that provides of the utility model comprises substrate, connector, two oil cylinders and two grabs; Wherein substrate is bar shaped; Connector is arranged on the middle part, surface of substrate, and two sidewall middle parts are formed through respectively a corresponding connecting hole; Two oil cylinders are separately positioned on the substrate surface that is positioned at the connector outside, cylinder body one end on each oil cylinder is hinged on the surface of close connector on the substrate, the piston rod outer end of the other end and the upper end of grab are hinged, and the two ends of cylinder body are formed with respectively a tubing interface that joins with oil pipe; Two grabs are separately positioned on the two ends of substrate, and the middle part of each grab is hinged on an outer end of substrate, and the lower end is formed with a to the inside bending and the bill of formation.

The outer shape of drilling rod lower end is corresponding on the interior shape of described connector and the Spiral digging machine, and the drilling rod lower end is inserted and is arranged in the connector.

It is identical with the shape of drill bit upper end on the Spiral digging machine that the bit-fishing unit that the utility model provides is that the shape with connector on it is designed to, in case drill bit falls for some reason to bottom, stake hole like this, only the drilling rod lower end need be linked to each other with connector and can carry out drill bit salvaging operation, therefore very convenient, practical, so just can utilize Spiral digging machine to continue boring, thereby can improve speed of application, reducing construction cost.In addition, this bit-fishing unit also has reasonable in design, low cost and other advantages.

Description of drawings

The bit-fishing unit structure top view that Fig. 1 provides for the utility model.

The bit-fishing unit structural front view that Fig. 2 provides for the utility model.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the bit-fishing unit that the utility model provides is elaborated.

As shown in Figure 1, the bit-fishing unit that provides of the utility model comprises substrate 1, connector 2, two oil cylinders 3 and two grabs 4; Wherein substrate 1 is bar shaped; Connector 2 is arranged on the middle part, surface of substrate 1, and two sidewall middle parts are formed through respectively a corresponding connecting hole 5; Two oil cylinders 3 are separately positioned on substrate 1 surface that is positioned at connector 2 outsides, cylinder body 6 one ends on each oil cylinder 3 are hinged on the surface of close connector 2 on the substrate 1, piston rod 7 outer ends of the other end and the upper end of grab 4 are hinged, and the two ends of cylinder body 6 are formed with respectively a tubing interface 9 that joins with oil pipe; Two grabs 4 are separately positioned on the two ends of substrate 1, and the middle part of each grab 4 is hinged on an outer end of substrate 1, and the lower end is formed with a to the inside bending and the bill 8 of formation.

The outer shape of drilling rod lower end is corresponding on the interior shape of described connector 2 and the Spiral digging machine, and the drilling rod lower end is inserted and is arranged in the connector 2.

The bit-fishing unit using method that now the utility model is provided is described below: when the drill bit of Spiral digging machine in the work progress separates with drilling rod and when falling to bottom, stake hole for some reason, at first the drilling rod with Spiral digging machine takes out from the stake hole, then the drilling rod lower end is inserted in the connector 2 on the bit-fishing unit that the utility model provides, afterwards not shown pin is passed from the corresponding side opening of two connecting holes 5 and drill bit lower end simultaneously, thus drilling rod and bit-fishing unit are linked together.Then utilize drilling rod with bit-fishing unit down to stake hole bottom, afterwards hydraulic oil is injected the inside of cylinder body 6 by the oil pipe of close connector 2, under the pressure-acting of hydraulic oil, piston rod 7 is with protruding, the lower end of two grabs 4 is moved inward relatively, until two bills 8 are tightly clamped drill bit, then upwards promote drilling rod and bit-fishing unit and drill bit, until drill bit is hung out a hole, at last hydraulic oil is passed through to inject away from the oil pipe of connector 2 inside of cylinder body 6, under the pressure-acting of hydraulic oil, piston rod 7 will inwardly shrink, make thus the lower end of two grabs 4 outwards mobile, until two bills 8 unclamp drill bit, can finish thus whole drill bit and salvage process.

Claims

1. bit-fishing unit, it is characterized in that: described bit-fishing unit comprises substrate (1), connector (2), two oil cylinders (3) and two grabs (4); Wherein substrate (1) is bar shaped; Connector (2) is arranged on the middle part, surface of substrate (1), and two sidewall middle parts are formed through respectively a corresponding connecting hole (5); Two oil cylinders (3) are separately positioned on substrate (1) surface that is positioned at connector (2) outside, cylinder body (6) one ends on each oil cylinder (3) are hinged on the upper surface near connector (2) of substrate (1), the upper end of the piston rod of the other end (7) outer end and grab (4) is hinged, and the two ends of cylinder body (6) are formed with respectively a tubing interface that joins with oil pipe (9); Two grabs (4) are separately positioned on the two ends of substrate (1), and the middle part of each grab (4) is hinged on an outer end of substrate (1), and the lower end is formed with a to the inside bending and the bill (8) of formation.

2. bit-fishing unit according to claim 1 is characterized in that: the outer shape of drilling rod lower end is corresponding on the interior shape of described connector (2) and the Spiral digging machine, and the drilling rod lower end is inserted and is arranged in the connector (2).