Directional rotation type air hammer

Abstract

The utility model discloses a directional rotation type air hammer which comprises an upper connector, the outer surface of the upper connector is fixedly connected with a shell, the inner surface of the shell is fixedly connected with an air distribution seat, the inner surface of the air distribution seat is fixedly connected with a driving seat, the inner surface of the driving seat is provided with a sliding groove, and the outer surface of the sliding groove is fixedly connected with an air cylinder. The inner surface of the air distribution seat is rotatably connected with a connecting seat, the lower surface of the connecting seat is fixedly connected with a drill bit, and the air distribution seat is internally provided with an air inlet groove, a circulating air groove, a first exhaust groove, a second exhaust groove and a double-impact mechanism; the double-impact mechanism comprises a first piston, a second piston, a sliding block, a spiral guide rail, a first impact plate and a second impact plate, a spiral groove is formed in the inner surface of the first piston, and by arranging the double-impact mechanism, gas can be recycled, and meanwhile the time for the pistons to impact the drill bit is shortened; the drilling and production efficiency can be improved while the gas utilization rate is increased, the loss of compressed gas can be reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling air hammers, in particular to a directional rotary air hammer. Background Art

[0002] Gas drilling technology uses an air hammer powered by high-pressure gas to break rock. It boasts a significant advantage, boasting a drilling speed over 10 times faster than conventional rotary drilling machines. To increase drilling speeds and expedite drilling projects, air hammer drilling has been widely used in the oil and gas well drilling industry both domestically and internationally.

[0003] However, most existing auto-propagating air hammers use compressed air to make the piston move up and down to impact the drill bit. However, there will be time intervals in the middle of the reciprocating motion of the piston without doing work, which will lead to low drilling efficiency. In addition, the high-pressure gas that pushes the piston will be discharged after doing work, which also leads to low utilization rate of compressed gas. After searching, it was found that the technical solution provided by the utility model with application number CN201120331495.8 also has the above-mentioned problems. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a directional rotary air hammer. By setting a double impact mechanism, the gas can be recycled while shortening the time for the piston to impact the drill bit, thereby improving the gas utilization rate and the efficiency of the drilling work, and also reducing the loss of compressed gas and saving costs.

[0005] The utility model also provides the above-mentioned directional rotary air hammer, comprising: an upper joint, the outer surface of the upper joint is fixedly connected to the outer shell, the inner surface of the outer shell is fixedly connected to the air distribution seat, the inner surface of the air distribution seat is fixedly connected to the driving seat, the inner surface of the driving seat is provided with a slide groove, the inner surface of the air distribution seat is rotatably connected to the connecting seat, the lower surface of the connecting seat is fixedly connected to the drill bit, and the interior of the air distribution seat is provided with an air inlet groove, a circulating air groove, a first exhaust groove and a second exhaust groove.

[0006] A double impact mechanism, the double impact mechanism includes a first piston, a second piston, a slider, a spiral guide, a rotating rod, a first impact plate and a second impact plate, the inner surface of the first piston is provided with a spiral groove, the inner surface of the second piston is provided with a spiral groove, the inner surface of the first piston is slidably connected to the rotating rod, the inner surface of the second piston is slidably connected to the rotating rod, the outer surface of the spiral guide is slidably connected to the spiral groove, the outer surface of the first piston is fixedly connected to the slider, the outer surface of the second piston is fixedly connected to the slider, the outer surface of the rotating rod is fixedly connected to the spiral guide, the outer surface of the rotating rod is rotatably connected to the first impact plate, and the outer surface of the rotating rod is rotatably connected to the second impact plate. By setting up a double impact mechanism, the gas can be recycled while shortening the time for the piston to impact the drill bit, the gas utilization rate can be improved while improving the efficiency of drilling and production, and the loss of compressed gas can be reduced, saving costs.

[0007] According to the directional rotary air hammer, the outer surface of the slider is slidably connected to the slide groove. The number of the sliders is eight and they are arranged in a circular array, which facilitates the up and down movement of the piston and fixes the direction of the piston so that the piston body does not rotate.

[0008] According to the directional rotary air hammer, the outer surface of the first impact plate is fixedly connected to the drive seat, and the outer surface of the second impact plate is fixedly connected to the drive seat, so that the impact force can be transmitted to the drill bit when the impact plate is impacted.

[0009] According to the directional rotary air hammer, one end of the circulating gas groove is connected to the first impact plate, and the end of the circulating gas groove away from the first impact plate is connected to the second impact plate, so as to facilitate the circulation of gas in the two pistons.

[0010] According to the directional rotary air hammer, the end of the second exhaust groove away from the upper joint is connected to the first impact plate, and the lower surface of the upper joint is fixedly connected to the gas distribution seat, so that the second piston can discharge compressed gas.

[0011] According to the directional rotary air hammer, a first air hole is provided inside the air distribution seat, and the inner surface of the first air hole is connected with the air intake groove, so that the air intake of the air intake groove can drive the first piston to move.

[0012] According to the directional rotary air hammer, a second air hole is provided inside the first impact plate, and the inner surface of the second air hole is connected to the air inlet groove, so that the air inlet groove can push the second piston to move.

[0013] According to the directional rotary air hammer, the upper surface of the connecting seat is fixedly connected to the rotating rod, and the outer surface of the rotating rod is rotatably connected to the air distribution seat, so that the rotating rod can drive the drill bit to rotate.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a cross-sectional diagram of an air inlet groove of a directional rotary air hammer of the present invention;

[0017] Figure 2 This is a cross-sectional diagram of a circulating air groove of a directional rotary air hammer of the present invention;

[0018] Figure 3 This is a cross-sectional diagram of an exhaust groove of a directional rotary air hammer of the present invention;

[0019] Figure 4 This is an exploded view of the internal structure of a directional rotary air hammer of the present invention.

[0020] Legend:

[0021] 1. Upper joint; 2. Outer shell; 3. Gas distribution seat; 4. Drive seat; 5. Slide groove; 6. Connecting seat; 7. Drill bit; 8. Air inlet groove; 9. Circulating air groove; 10. First exhaust groove; 11. Second exhaust groove; 12. First piston; 13. Second piston; 14. Slider; 15. Spiral guide rail; 16. Rotating rod; 17. First impact plate; 18. Second impact plate; 19. Spiral groove; 20. First air hole; 21. Second air hole. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] Reference Figure 1-4The utility model embodiment is a directional rotary air hammer, comprising: an upper joint 1, the outer surface of the upper joint 1 is fixedly connected to a shell 2, the inner surface of the shell 2 is fixedly connected to a gas distribution seat 3, the lower surface of the upper joint 1 is fixedly connected to the gas distribution seat 3, the interior of the gas distribution seat 3 is provided with a first air hole 20, the inner surface of the gas distribution seat 3 is fixedly connected to a driving seat 4, the inner surface of the driving seat 4 is provided with a slide groove 5, the inner surface of the gas distribution seat 3 is rotatably connected to a connecting seat 6, the lower surface of the connecting seat 6 is fixedly connected to a drill bit 7, the interior of the gas distribution seat 3 is provided with an air intake groove 8, a circulating air groove 9, a first exhaust groove 10 and a second exhaust groove 11, and the inner surface of the first air hole 20 is communicated with the air intake groove 8.

[0024] Double impact mechanism, the double impact mechanism includes a first piston 12, a second piston 13, a slider 14, a spiral guide 15, a rotating rod 16, a first impact plate 17 and a second impact plate 18. The outer surface of the rotating rod 16 is rotatably connected to the gas distribution seat 3, the upper surface of the connecting seat 6 is fixedly connected to the rotating rod 16, the outer surface of the slider 14 is slidably connected to the slide groove 5, the number of sliders 14 is eight and arranged in a circular array, the outer surface of the first impact plate 17 is fixedly connected to the drive seat 4, the outer surface of the second impact plate 18 is fixedly connected to the drive seat 4, one end of the circulating gas groove 9 is connected to the first impact plate 17, the end of the second exhaust groove 11 away from the upper joint 1 is connected to the first impact plate 17, and the end of the circulating gas groove 9 away from the first impact plate 17 is connected to the second impact plate 18 The inner surface of the first piston 12 is provided with a spiral groove 19, the inner surface of the second piston 13 is provided with a spiral groove 19, the interior of the first impact plate 17 is provided with a second air hole 21, the inner surface of the second air hole 21 is connected to the air inlet groove 8, the inner surface of the first piston 12 is slidingly connected to the rotating rod 16, the inner surface of the second piston 13 is slidingly connected to the rotating rod 16, the outer surface of the spiral guide rail 15 is slidingly connected to the spiral groove 19, the outer surface of the first piston 12 is fixedly connected to the slider 14, the outer surface of the second piston 13 is fixedly connected to the slider 14, the outer surface of the rotating rod 16 is fixedly connected to the spiral guide rail 15, the outer surface of the rotating rod 16 is rotatably connected to the first impact plate 17, and the outer surface of the rotating rod 16 is rotatably connected to the second impact plate 18.

[0025] Working principle: The first piston 12 and the second piston 13 are both overrunning clutches. During operation, the high-pressure gas upper joint 1 enters the air cavity between the valve seat 3 and the upper joint 1. At this time, the first exhaust groove 10 and the second air hole are closed 21, and the first air hole 20 and the second exhaust groove 11 are opened. The high-pressure gas enters the air cavity above the first piston 12 through the air inlet groove 8 inside the valve seat 3 and the first air hole 20. The high-pressure gas pushes the first piston 12 to move downward along the slide groove 5, and the gas in the air cavity below the first piston 12 is passed from the circulating gas groove 9 into the air cavity below the second piston 13, causing the second piston 13 to move upward and the gas in the upper air cavity to be discharged from the second exhaust groove 11. At this time, the first piston 12 is locked and cannot rotate. The interaction between the spiral groove 19 and the spiral guide rail 15 will drive the rotating rod 16 to rotate, and the rotating rod 16 drives the drill bit 7 to rotate through the connecting seat 6 to operate. The first piston 12 will impact the first impact plate 17, and the second piston 13 is in the rising process because it is an overrunning clutch. The first exhaust groove 10 and the second exhaust groove 11 are opened, and the first air hole 20 and the second exhaust groove 11 are closed. The high-pressure gas will enter the air cavity above the second piston 13 from the second air hole 21, pushing the second piston 13 to move downward to impact the second impact plate 18. At this time, the second piston 13 is locked, and the interaction between the spiral groove 19 and the spiral guide rail 15 will drive the rotating rod 16 to rotate. The second piston 13 will pass the gas in the lower air cavity through the circulating gas groove 9 into the air cavity below the first piston 12, causing the first piston 12 to move upward, and discharge the gas in the air cavity above the first piston 12 from the first exhaust groove 10. Because the first piston 12 is an overrunning clutch, the rotating rod 16 will not rotate during the rising process. The gas discharged from the first exhaust groove 10 and the second exhaust groove 11 will enter the air cavity between the valve seat 3 and the upper joint 1 for recycling. In this way, the drill bit 7 can be continuously impacted and the drill bit 7 can be continuously rotated in a directional manner.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A directional rotary air hammer, characterized in that: include: An upper joint (1), wherein the outer surface of the upper joint (1) is fixedly connected to a housing (2), the inner surface of the housing (2) is fixedly connected to a gas distribution seat (3), the inner surface of the gas distribution seat (3) is fixedly connected to a driving seat (4), the inner surface of the driving seat (4) is provided with a slide groove (5), the inner surface of the gas distribution seat (3) is rotatably connected to a connecting seat (6), the lower surface of the connecting seat (6) is fixedly connected to a drill bit (7), and the interior of the gas distribution seat (3) is provided with an air inlet groove (8), a circulating air groove (9), a first exhaust groove (10) and a second exhaust groove (11); A double impact mechanism, comprising a first piston (12), a second piston (13), a slider (14), a spiral guide rail (15), a rotating rod (16), a first impact plate (17) and a second impact plate (18), wherein the inner surface of the first piston (12) is provided with a spiral groove (19), the inner surface of the second piston (13) is provided with a spiral groove (19), the inner surface of the first piston (12) is slidably connected to the rotating rod (16), the inner surface of the second piston (13) is slidably connected to the rotating rod (16), the outer surface of the spiral guide rail (15) is slidably connected to the spiral groove (19), the outer surface of the first piston (12) is fixedly connected to the slider (14), the outer surface of the second piston (13) is fixedly connected to the slider (14), the outer surface of the rotating rod (16) is fixedly connected to the spiral guide rail (15), the outer surface of the rotating rod (16) is rotatably connected to the first impact plate (17), and the outer surface of the rotating rod (16) is rotatably connected to the second impact plate (18).

2. A directional rotary air hammer according to claim 1, characterized in that: The outer surface of the slider (14) is slidably connected to the slide groove (5), and the number of the sliders (14) is eight and they are arranged in a ring array.

3. A directional rotary air hammer according to claim 1, characterized in that: The outer surface of the first impact plate (17) is fixedly connected to the drive seat (4), and the outer surface of the second impact plate (18) is fixedly connected to the drive seat (4).

4. A directional rotary air hammer according to claim 1, characterized in that: One end of the circulating gas groove (9) is connected to the first impact plate (17), and one end of the circulating gas groove (9) away from the first impact plate (17) is connected to the second impact plate (18).

5. A directional rotary air hammer according to claim 1, characterized in that: One end of the second exhaust groove (11) away from the upper joint (1) is connected to the first impact plate (17), and the lower surface of the upper joint (1) is fixedly connected to the gas distribution seat (3).

6. A directional rotary air hammer according to claim 1, characterized in that: A first air hole (20) is provided inside the gas distribution seat (3), and the inner surface of the first air hole (20) is connected to the air inlet groove (8).

7. The directional rotary air hammer according to claim 1, characterized in that: A second air hole (21) is provided inside the first impact plate (17), and the inner surface of the second air hole (21) is communicated with the air inlet groove (8).

8. The directional rotary air hammer according to claim 1, characterized in that: The upper surface of the connecting seat (6) is fixedly connected to the rotating rod (16), and the outer surface of the rotating rod (16) is rotatably connected to the gas distribution seat (3).

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