Middle-low air pressure down-hole hammer
A technology of down-the-hole impactor and wind pressure, which is applied in drilling equipment, earthwork drilling, driving device for drilling in wellbore, etc. and other problems, to achieve the effect of simple and smooth air distribution channel, wide range of working pressure, and improvement of single impact energy.
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Embodiment 1
[0023] Such as figure 2 As shown, a medium and low wind pressure down-the-hole impactor includes a rear joint 1, a check valve 2, a gas distribution rod 4, a piston 6, an inner cylinder 5, an outer sleeve 7, a collar 8, a guide sleeve 9, a plug 16. The first spring 17, the rubber rod 18, the cross pin 19, the pin type drill bit 20 and the pin type front joint 21, the check valve is a one-way valve, which has a valve seat and a second spring 3, the The piston is a slender piston with a hole, and it is characterized in that: the gas distribution rod and the air intake seat 22 at the rear end of the check valve are integrated, and the inner cylinder is located outside the gas distribution rod and the piston. During the process, the mating end of the piston and the gas distribution rod is always inside the inner cylinder, a cavity is formed between the piston part and the outer sleeve, and the rest of the piston cooperates with the inner cylinder. The outer side of the air intak...
Embodiment 2
[0026] Such as image 3 , it differs from Embodiment 1 in that the device for preventing the drill bit from falling off is different. In Embodiment 1, the plugging 16, the first spring 17, the rubber rod 18, and the cross pin 19 are used to ensure that the drill bit does not fall off. Open snap ring 11 guarantees that drill bit 15 does not come off, and front joint 14 is to be used for driving drill bit 15 to rotate and slide. At this time, a third O-shaped sealing ring 13 will be arranged between the snap ring 11 and the front connector.
[0027] The working principle of the present invention is as follows:
[0028] In order to start the impactor, the impactor must be lowered first. When the drill bit is in contact with the rock and jacks up the piston is in figure 2 When the position shown is reached, preparations for start-up are complete.
[0029] The high-pressure gas P introduced from the hollow channel 24 of the rear joint pushes back the check valve 2 and passes t...
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