CN204532329U - Borehole accuracy precise control device - Google Patents

Abstract

A kind of borehole accuracy precise control device, this device comprises the guide pipe be fixedly mounted on by tube connector on support; Guide pipe one end is socketed with the first centering pipe, and the guide pipe other end is socketed with the second centering pipe, and borer drill rod runs through the first centering pipe and the second centering pipe; First centering pipe and the socket end of guide pipe are provided with one group of symmetrical spacing ring.The borehole accuracy precise control device that the utility model provides, when can overcome bore operation, drill pipe wobbling amplitude is comparatively large, the problem that pore-forming accuracy is lower; It is simple that processing and fabricating is set, easy to use, very effective to raising borehole accuracy.

Description

Drilling precision precision control device

technical field

The utility model relates to a precise control device, in particular to a precision control device for drilling precision in smooth surface blasting.

Background technique

In earthwork engineering, for some key parts, in order to ensure the molding quality and reduce the impact of blasting, the design requires the construction of smooth controlled blasting, such as rock anchor beams in underground powerhouse projects. In order to improve the drilling accuracy, steel pipe drilling sample racks or supports are generally used to assist construction. However, the drill pipe swings a lot during drilling operations, and the hole forming accuracy is difficult to meet the requirements, thus affecting the quality of excavation and forming.

Contents of the invention

The technical problem to be solved by the utility model is to provide a precise control device for drilling precision, which can overcome the problems of large swing range of the drill rod and low hole forming precision during drilling operations; Drilling precision is very effective.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a precise control device for drilling precision,

The device includes a guide tube fixedly installed on the bracket through a connecting tube;

One end of the guide tube is sleeved with the first centering tube, the other end of the guide tube is sleeved with the second centering tube, and the drill pipe of the drilling rig runs through the first centering tube and the second centering tube;

A set of symmetrical limit rings is arranged on the sleeve ends of the first centering pipe and the guide pipe.

The pipe diameters of the first centering pipe and the second centering pipe are the same, and its outer diameter is slightly smaller than the inner diameter of the guide pipe, and its inner diameter is slightly larger than the outer diameter of the drill rod of the drilling rig.

The precise control device for drilling precision provided by the utility model can reduce the swinging amplitude of the drill pipe and control the drilling precision through the close cooperation between the guide tube and the first centering tube and the second centering tube, thereby ensuring a smooth surface Blasting molding quality is very effective for improving drilling accuracy. It is especially suitable for smooth blasting and drilling construction of key parts with high detailed structure or high quality requirements in stonework engineering.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of guide pipe of the present invention;

Fig. 3 is a schematic diagram of the first centering tube of the present invention;

Fig. 4 is the A-A direction sectional view of Fig. 3 of the present utility model;

Fig. 5 is a schematic diagram of the first centering tube of the present invention;

Fig. 6 is a schematic diagram of the working state of the blasting drilling on the down-tilted surface by adopting the utility model;

Fig. 7 is a schematic diagram of the working state of the utility model for drilling blasting holes on the inclined surface.

Detailed ways

As shown in Figure 1-Figure 5, a precise control device for drilling accuracy,

The device comprises a guide pipe 1 fixedly installed on a bracket 5 through a connecting pipe 6;

One end of the guide tube 1 is sleeved with the first centering tube 2, the other end of the guide tube 1 is sleeved with the second centering tube 3, and the drilling rod 7 runs through the first centering tube 2 and the second centering tube 3;

A group of symmetrical limit rings 4 are arranged on the sleeve end of the first centering pipe 2 and the guide pipe 1, and the functions are as follows:

1. Prevent the first centering pipe 2 from sliding down to the bottom with the drilling hole when drilling down;

2. It is convenient to fix the first centering pipe 2 so as not to slide down when drilling upwards, so that it is kept in the guide pipe 1 to play a centering role, thereby ensuring the drilling accuracy.

The diameter of the first centering pipe 2 and the second centering pipe 3 is the same, its outer diameter is slightly smaller than the inner diameter of the guide pipe 1, and its inner diameter is slightly larger than the outer diameter of the drill pipe 7 of the drilling rig, reducing the distance between the drill pipe 7 and the centering pipe. The gap between them improves the drilling accuracy.

The support 5 is preferably made of a steel pipe bent frame or erected at the work site, and the steel pipe is a scaffold steel pipe with a diameter of 48mm commonly used in the market.

The connecting pipe 6 and the guide pipe 1 are preferably steel pipes with a diameter of 48 mm, which are convenient to be connected and fixed with the bracket 5 by using a special buckle.

Example 1:

As shown in Figure 6, for the blasting and drilling operation on the down-tilted smooth surface, the guide pipe 1 is fixed on the bracket 5 through the connecting pipe 6, and the angle measurement and check are carried out; the first centering pipe 2 and the second centering pipe 3 Insert the drill pipe 7 of the drilling rig in sequence; insert the drill pipe 7 into the guide pipe 1, and the drill bit reaches the bedrock surface. At this time, the first centering pipe 2 and the second centering pipe 3 slide down by their own weight, and the second The middle pipe 3 is at the lower part of the guide pipe 1, and the first centering pipe 2 is restricted at the upper part of the guide pipe 1 by the limit ring 4; the drilling machine is turned on for drilling operations.

Example 2:

As shown in Figure 7, for the blasting and drilling operations on the upper Yangon surface, the guide pipe 1 is fixed on the bracket 5 through the connecting pipe 6, and the angle measurement and verification are carried out; the first centering pipe 2 is inserted into the drill pipe 7 of the drilling rig; Insert the drill pipe 7 into the guide pipe 1, and the drill bit reaches the bedrock surface, and fix the first centering pipe 2 and the bracket 5 obliquely by wire or rope through the limit ring 4, so as to prevent the first centering pipe from 2. It slides down by its own weight; turn on the drilling rig for drilling operations.

Claims (2)

1. a borehole accuracy precise control device, is characterized in that:

This device comprises the guide pipe (1) be fixedly mounted on by tube connector (6) on support (5);

Guide pipe (1) one end is socketed with the first centering pipe (2), and guide pipe (1) other end is socketed with the second centering pipe (3), and borer drill rod (7) runs through the first centering pipe (2) and the second centering pipe (3);

First centering pipe (2) and the socket end of guide pipe (1) are provided with one group of symmetrical spacing ring (4).

2. borehole accuracy precise control device according to claim 1, it is characterized in that: the first centering pipe (2) is identical with the caliber that the second centering manages (3), its external diameter is slightly less than the internal diameter of guide pipe (1), and its internal diameter is slightly larger than the external diameter of borer drill rod (7).