Drill rod connecting device with axial air inlet and down-the-hole drill

Abstract

The drill rod connecting device comprises a rotary main shaft, one end of the rotary main shaft is connected with a drill rod, the other end of the rotary main shaft is provided with the axial air inlet, an axial through hole is formed in the rotary main shaft, and the axial air inlet is communicated with the axial through hole and used for conveying high-pressure air to the drill rod. According to the horizontal drilling machine, the air inlet position is changed, the requirement for drilling holes in the two sides of a horizontal hole is met, the machine does not need to be moved, the working intensity of operators is reduced, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of mine mining, in particular to a drill rod connecting device of a down-the-hole drill. Background Art

[0002] Refer to the attached Figure 1-4 The drill rod connection device of the current self-propelled down-the-hole drill rig is driven by a motor to rotate the drill rod, and air is taken in from the side. The air inlet is installed radially, resulting in a 90° angle pressure loss. In addition, when the gas-driven impactor is working, the boom size of existing small and medium-sized down-the-hole drill vehicles is relatively short. The front-end drill frame is limited by the position of the air intake pipe on the side of the drill rod connection device, and can only perform single-sided horizontal drilling. After the drill frame is flipped 180°, the air intake joint interferes with the ground, and the height requirement for drilling horizontal holes from the ground cannot be met. Drilling a horizontal hole in the other direction requires changing the position of the machine, which is inconvenient to use and increases the workload. Utility Model Content

[0003] In response to the deficiencies of the existing technology, the utility model provides a drill rod connection device with an axial air inlet and a down-the-hole drill rig. After rotating the drill rod connection device 180°, the height requirement for drilling horizontal holes on both sides can still be met to solve the above-mentioned problems.

[0004] The utility model provides the following technical solutions:

[0005] A drill pipe connection device with an axial air inlet comprises a rotating main shaft, one end of the rotating main shaft is connected to the drill pipe, and the other end is provided with an axial air inlet, an axial through hole is provided in the rotating main shaft, the axial air inlet is communicated with the axial through hole, and is used to deliver high-pressure gas to the drill pipe, the rotating main shaft is fixedly mounted on a mounting seat through a bearing, the hydraulic motor is eccentrically arranged with the rotating main shaft and fixed to one side of the mounting seat, the hydraulic motor is coaxially arranged with the transmission gear, the rotating main shaft is coaxially arranged with the transmission gear 2, the hydraulic motor directly drives the transmission gear 1, the transmission gear 1 is meshed with the transmission gear 2 for transmission, and drives the rotating main shaft to rotate.

[0006] Furthermore, a plurality of annular sealing rings are provided on the connection between the rotary main shaft and the mounting seat.

[0007] Furthermore, the bearing is a tapered bearing.

[0008] Furthermore, the transmission gear 1 and the transmission gear 2 are externally meshed.

[0009] The utility model also discloses a down-the-hole drill, comprising the aforementioned drill rod connecting device with an axial air inlet.

[0010] The utility model has the following beneficial technical effects:

[0011] The utility model changes the air intake position and installs the air inlet axially, which reduces the 90° angle pressure loss caused by radial installation compared with the traditional lateral air intake. After the machine flips the drill frame 180°, the air intake pipe does not interfere with the ground, and the working requirements of drilling horizontal holes can still be directly met without changing the direction of the entire machine. The requirements of drilling holes on both sides of the horizontal hole can be met. After flipping, there is no need to move the machine, which reduces the workload of the operator and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1-4 This is a schematic diagram of the flip construction of the drill pipe connection device of the side air inlet in the prior art;

[0013] Figure 5 This is a structural diagram of a drill rod connection device with an axial air inlet according to the present invention;

[0014] Figure 6 This is a construction schematic diagram of a drill rod connection device with an axial air inlet according to the present invention.

[0015] The reference numerals in the figures are:

[0016] 1. Hydraulic motor; 2. Transmission gear 1; 3. Air inlet; 4. Transmission gear 2; 5. Bearing; 6. Rotating spindle; 7. Mounting seat; 8. Sealing ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example

[0019] A down-the-hole drill relates to a drill pipe connection device with an axial air inlet, comprising a rotating main shaft 6, one end of the rotating main shaft 6 is connected to the drill pipe, and the other end is provided with an axial air inlet 3, an axial through hole is provided in the rotating main shaft 6, the axial air inlet 3 is communicated with the axial through hole, and is used to deliver high-pressure gas to the drill pipe, the rotating main shaft 6 is fixedly mounted on the mounting seat 7 through a bearing 5, the hydraulic motor 1 is eccentrically arranged with the rotating main shaft 6 and fixed to one side of the mounting seat 7, the hydraulic motor 1 is coaxially arranged with the transmission gear 1 2, the rotating main shaft 6 is coaxially arranged with the transmission gear 2 4, the hydraulic motor 1 directly drives the transmission gear 1 2, the transmission gear 1 2 is externally meshed with the transmission gear 2 4, and drives the rotating main shaft 6 to rotate.

[0020] In this embodiment, a plurality of annular sealing rings 8 are provided on the connection between the rotating main shaft 6 and the mounting seat 7, the bearing 5 is a tapered bearing, and the transmission gear 1 2 and the transmission gear 2 7 are externally meshed transmission.

[0021] In this embodiment, by adjusting the internal layout of the mounting seat 7, the hydraulic motor 1 is used to rotate the rotary main shaft 6 through gear transmission to achieve axial installation of the air inlet, reducing the 90° angle pressure loss caused by radial installation, and the axial impact force is transmitted to the mounting seat by the tapered bearing.

[0022] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A drill pipe connection device with an axial air inlet, characterized in that: It includes a rotating main shaft, one end of the rotating main shaft is connected to the drill pipe, and the other end is provided with an axial air inlet. An axial through hole is provided in the rotating main shaft, and the axial air inlet is communicated with the axial through hole for delivering high-pressure gas to the drill pipe. The rotating main shaft is fixedly mounted on the mounting seat through a bearing, the hydraulic motor and the rotating main shaft are eccentrically arranged and fixed on one side of the mounting seat, the hydraulic motor and the transmission gear are coaxially arranged, the rotating main shaft and the transmission gear 2 are coaxially arranged, the hydraulic motor directly drives the transmission gear 1, the transmission gear 1 is meshed with the transmission gear 2 for transmission, and drives the rotating main shaft to rotate.

2. The drill pipe connection device with an axial air inlet according to claim 1, characterized in that: A sealing ring is provided on the connection between the rotary main shaft and the mounting seat.

3. The drill pipe connection device with an axial air inlet according to claim 1, characterized in that: The bearing is a tapered bearing.

4. The drill pipe connection device with an axial air inlet according to claim 1, characterized in that: Transmission gear 1 and transmission gear 2 are externally meshed transmission.

5. A down-the-hole drill, characterized in that: A drill pipe connection device comprising an axial air inlet according to any one of claims 1 to 4.

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