CN201330559Y - Pneumatic down-hole hammer wind-pressure drilling device - Google Patents

Abstract

The utility model relates to a pneumatic down-the-hole hammer drilling device, in particular to a pneumatic down-the-hole hammer pneumatic drilling device for drilling in gravel layers and sand pebble layers, and is characterized in that a wear-resistant sleeve is placed outside the drill pipe A connecting disc is arranged between the wear-resistant casing and the drill pipe, and connecting handles are arranged at both ends of the wear-resistant casing. There is a disc fixedly connected between the middle part of the wear-resistant casing and the drill pipe, and the connecting handle at the upper port of the wear-resistant casing is connected with the drill pipe through a sealing disc to form a wind speed increase in the borehole composite drill pipe. Or between the upper part, the lower part of the wear-resistant casing and the drill pipe, a connecting disc is respectively provided as a fixed support of the wear-resistant casing to form a powder fishing pipe. The air pressure drilling device of the pneumatic down-the-hole hammer of the utility model can remove the rock dust, cuttings and gravel in the borehole in time by increasing the wind speed in the borehole and adding a powder scooping pipe, thereby greatly improving the drilling efficiency.

Description

Pneumatic down-the-hole hammer pneumatic drilling device

technical field

The utility model relates to a pneumatic down-the-hole hammer drilling device, in particular to a pneumatic down-the-hole hammer air pressure drilling device for drilling in gravel layers and sand pebble layers.

Background technique

At present, in the drilling method of pneumatic down-the-hole hammer, especially П-130 pneumatic down-the-hole hammer (drilling tool diameter 110mm, drilling diameter 130mm), air compressors are generally used as driving equipment. The wind pressure is a fixed value. With the increase of the drilling depth, the rock powder, cuttings and gravel produced by the DTH hammer cannot be discharged from the hole in time, and are suspended in the hole. When the wind supply is stopped, a large amount of rock powder and cuttings will And gravel accumulates at the bottom of the borehole, burying the drilling tool, and it is impossible to increase the drill pipe to continue drilling, especially when encountering a sandy pebble layer and a gravel layer, this situation is more serious, and the drilling efficiency is greatly reduced.

Contents of the invention

The purpose of this utility model is to provide a pneumatic down-the-hole hammer air pressure drilling device that can improve drilling efficiency and help rock powder, cuttings and gravel to be discharged.

The purpose of this utility model is achieved through the following technical solutions.

The air pressure drilling device of the pneumatic down-the-hole hammer of the utility model includes a drill pipe, and is characterized in that a wear-resistant casing is placed outside the drill pipe, and a wear-resistant casing is placed between the wear-resistant casing and the drill pipe. A connecting disk is provided, and connecting handles are provided at both ends of the wear-resistant sleeve, and the connecting handle at the lower port is connected to the tapered closed section.

A connecting disk is arranged between the middle part of the wear-resistant casing and the drill pipe, and the connecting handle at the upper port of the wear-resistant casing is connected to a sealing disk to form a raised drilling hole. Composite drill pipe with internal wind speed.

Between the upper part and the lower part of the wear-resistant casing and the drill pipe, there are fixedly connected disks as the fixed brackets of the wear-resistant casing to form a powder fishing pipe, and the upper side of the upper connection disk Form a powder fishing chamber.

When the diameter of the drill pipe is 50 mm, the wear-resistant casing with a thickness of 3-5 mm and a diameter of 90 mm is selected as the wear-resistant casing.

The pneumatic DTH hammer air pressure drilling device of the utility model, the working principle of the device for increasing the wind speed in the borehole: according to the formula Q=F/S, wherein: Q-pressure, F-pressure, S-forced area, when the air pressure When the working wind pressure (Q) of the machine is fixed, to increase the wind force (F) in the borehole, it is necessary to reduce the stress area (S) in the borehole. Because the cross-sectional area of the drilled hole is fixed, the force-bearing area (S) in the hole can be reduced by increasing the cross-sectional area of the drill pipe, so as to achieve the purpose of increasing the wind force in the hole and increasing the wind speed. The utility model aims to increase the cross-sectional area of the drill pipe by welding wear-resistant casings on the outside of the required original drill pipe. Drilling, due to the increase of the wind speed and the wind force in the hole, it will help the rock powder, cuttings and gravel to discharge the pneumatic down-the-hole hammer. The rock powder, cuttings and gravel will not accumulate at the bottom of the hole, so there will be no Drilling tools will be buried, which can improve drilling efficiency.

The powder fishing tube structure of the utility model is basically the same as the composite drill pipe for increasing the wind speed in the borehole, except that the upper end is not sealed, and the rock powder, cuttings and gravel produced during the drilling process can fall into the wear-resistant sleeve through the upper opening In the cavity between the pipe and the drill pipe, when the drilling tool is lifted out of the borehole, the rock powder, cuttings and gravel produced during the drilling process can be pulled out of the borehole. The powder scooping tube of the utility model can be used in conjunction with the device for increasing the wind speed in the borehole to further improve the drilling efficiency.

Description of drawings

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

Fig. 2 is a schematic structural view of another embodiment of the present invention.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with the embodiment shown in the accompanying drawings.

As shown in Figures 1 and 2, the pneumatic DTH hammer pneumatic drilling device of the present utility model includes a drill pipe 3, and is characterized in that a wear-resistant casing 1 is placed outside the drill pipe 3, where the wear-resistant A connecting disc 2 is arranged between the grinding casing 1 and the drill pipe 3 , and a connecting handle is provided at both ends of the wear-resistant casing 1 , and the connecting handle at the lower port is connected to the tapered closed section 4 . The conical sealing section and the wear-resistant sleeve 1 can be connected by welding or threaded connection.

In the embodiment shown in Figure 1, a connecting disk 2 is provided between the middle part of the wear-resistant casing 1 and the drill pipe, and the upper port of the wear-resistant casing 1 is The connecting handle is connected with the drill pipe 3 through the sealing disc 5 to form a composite drill pipe that improves the wind speed in the borehole.

Or in the embodiment shown in Fig. 2, two upper and lower connecting discs 2 are arranged between the upper and lower parts of the wear-resistant casing 1 and the drill pipe as the fixing of the wear-resistant casing. Bracket, shaped powder fishing tube. On the upper side of the upper connecting disc, a powder fishing chamber is formed.

As a specific embodiment, when the diameter of the drill pipe 3 is 50 mm, the wear-resistant casing 1 is selected as a wear-resistant casing with a thickness of 3-5 mm and a diameter of 90 mm. The wear-resistant casing generally adopts wear-resistant steel pipe.

The air pressure drilling device of the pneumatic down-the-hole hammer of the utility model can remove the rock dust, cuttings and gravel in the borehole in time by increasing the wind speed in the borehole and adding a powder scooping pipe, thereby greatly improving the drilling efficiency.

Claims (4)

1, a kind of wind pressure drilling device of pneumatic down-hole hammer, comprise drilling rod, it is characterized in that wear-resistant sleeve of suit outside described drilling rod, between this wear-resistant sleeve and described drilling rod, be provided with clutch disk, be provided with the connection catcher at the two ends of this wear-resistant sleeve, the connection catcher at lower port place connects the taper closed section.

2, wind pressure drilling device of pneumatic down-hole hammer according to claim 1, it is characterized in that being provided with a clutch disk between the middle part of described wear-resistant sleeve and described drilling rod, the connection catcher at the upper port place of described wear-resistant sleeve is connected by sealing disk with drilling rod.

3, wind pressure drilling device of pneumatic down-hole hammer according to claim 1, it is characterized in that respectively being provided with the fixed support of clutch disk between top, bottom and the described drilling rod at described wear-resistant sleeve as wear-resistant sleeve, tube cell is dragged in formation, drags for the powder chamber in the upside formation of last clutch disk.

4, wind pressure drilling device of pneumatic down-hole hammer according to claim 1 is characterized in that when the diameter of described drilling rod is 50mm, and it is that 3-5mm, diameter are the wear-resistant sleeve of 90mm that described wear-resistant sleeve is selected thickness for use.

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