A cluster down-the-hole hammer

Abstract

The invention discloses a cluster down-the-hole hammer, including a drill rod and a down-the-hole hammer connected to the drill rod, a main air inlet is provided on the drill rod, a high-pressure air chamber connected to the main air inlet is provided on the down-the-hole hammer, an airflow regulating valve having a valve plate and an airflow regulating hole is provided between the drill rod and the down-the-hole hammer, the valve plate closes the airflow regulating hole, the air inlet of the airflow regulating valve is connected to the main air inlet, and the air outlet is connected to the high-pressure air chamber, a diversion air chamber is provided on the down-the-hole hammer, and the opening and closing degree of the valve plate on the airflow regulating hole is adjusted so that the high-pressure gas in the main air inlet is diverted to the diversion air chamber. The invention can ensure the timely adjustment of the airflow when the cluster down-the-hole hammer is drilling and rock drilling in different strata, thereby improving the rock drilling efficiency and saving energy consumption. The entire linkage structure operation structure in the airflow regulating valve is convenient for loading and unloading, and the corresponding exhaust channel is set only by the structure of the down-the-hole hammer shell itself, without the need for additional components, and the structural design is reasonable and compact.

Description

Technical field:

[0001] The invention relates to a cluster down-the-hole hammer. Background technology:

[0002] In the field of large-diameter drilling and rock drilling, in order to improve the operating efficiency of the drilling rig, clustered down-the-hole hammers are often used for operation. Clustered down-the-hole hammers require centralized gas supply during operation. The gas is centrally output by the air compressor and distributed to each down-the-hole hammer in the clustered down-the-hole hammer through the gas pipeline. The gas flow and pressure must be adjusted continuously according to the changes in the rock formation. When the rock formation is hard, high-pressure and high-flow gas should be used to improve the rock drilling efficiency. When the rock formation is not hard, low-pressure and low-flow gas can be used to adapt to the rock formation.

[0003] At present, when cluster down-the-hole hammers are used for operation, high-pressure, large-flow, and high-power air compressors are often used for centralized air supply. When the hardness of the rock formation changes, the pressure and flow of the air flow cannot be adjusted, resulting in excessive energy consumption in drilling and rock drilling.

[0004] Therefore, based on the current cluster down-the-hole drilling technology, a cluster down-the-hole hammer is proposed, which can ensure timely adjustment of airflow when the cluster down-the-hole hammer is drilling and drilling in different formations, thereby improving the drilling efficiency and saving energy consumption. Summary of the invention:

[0005] The purpose of the present invention is to solve the problem that the concentrated airflow cannot be adjusted during the drilling and rock drilling operations of the existing clustered down-the-hole hammer, and to provide a clustered down-the-hole hammer with adjustable airflow to improve the rock drilling efficiency of the clustered down-the-hole hammer.

[0006] The technical solutions adopted in the present invention are:

[0007] A cluster down-the-hole hammer comprises a drill rod and a down-the-hole hammer connected to the drill rod, wherein a main air inlet is provided on the drill rod, and a high-pressure air chamber connected to the main air inlet is provided on the down-the-hole hammer, and an airflow regulating valve having a valve plate and an airflow regulating hole is provided between the drill rod and the down-the-hole hammer, wherein the valve plate closes the airflow regulating hole, an air inlet of the airflow regulating valve is connected to the main air inlet, and an air outlet is connected to the high-pressure air chamber, and a diversion air chamber is provided on the down-the-hole hammer, and the opening and closing degree of the valve plate on the airflow regulating hole is adjusted so that the high-pressure gas in the main air inlet is diverted to the diversion air chamber.

[0008] Furthermore, the airflow regulating valve includes an inner cylinder, an intermediate cylinder and an outer cylinder coaxially arranged from the inside to the outside, the two ports of the inner cylinder form the air inlet and the air outlet of the airflow regulating valve, and a plurality of airflow regulating holes are evenly distributed on the circumferential surface of the inner cylinder. The cavity formed between the inner wall surface of the intermediate cylinder and the outer wall surface of the inner cylinder is connected to the diversion air chamber.

[0009] Furthermore, a valve sheet is provided at each airflow adjustment hole.

[0010] Furthermore, a linkage mechanism for driving all valve plates to move in the same direction simultaneously is provided on the outer wall of the intermediate cylinder.

[0011] Furthermore, the linkage mechanism includes a rotating shaft, an outer driving rod, an inner driving rod, a connecting rod, an actuator and a linkage rod. Several rotating shafts are rotatably connected to the outer wall of the intermediate cylinder at a certain interval, and the axis of the rotating shaft is perpendicular to the axis of the intermediate cylinder. The two ends of the rotating shaft are respectively placed on the inner and outer sides of the intermediate cylinder, and the inner driving rod and the outer driving rod are respectively fixed on the inner and outer sides of each rotating shaft. A linkage rod is hinged between two adjacent outer driving rods, and a connecting rod is hinged on each inner driving rod. Each connecting rod is hinged to a valve plate, and at least two actuators are hinged to the outer wall of the intermediate cylinder, and the output shaft of the actuator is connected to a rotating shaft at a corresponding position.

[0012] Furthermore, the actuator is an oil cylinder, and a driving arm is hinged on the output shaft of the actuator, and the driving arm is fixedly connected to the rotating shaft at a corresponding position.

[0013] Furthermore, a plurality of mounting through holes are evenly distributed on the outer wall of the intermediate cylinder, a plurality of rectangular limit seats are welded on the outer wall of the inner cylinder, a limit block is clamped on each limit seat, a bearing seat is fixed in each mounting through hole, and both ends of each rotating shaft are rotatably connected to the bearing seat and the limit block at the corresponding position.

[0014] Furthermore, the airflow regulating hole is a rectangular hole structure, and sliding ribs are provided on the upper and lower sides of each airflow regulating hole, and the valve plate is slidably connected to the sliding ribs.

[0015] Furthermore, the upper and lower ends of the valve plate are bent at 90 degrees to form sliding edges, and the two sliding edges are correspondingly placed on two sliding ribs on both sides of each airflow adjustment hole.

[0016] Furthermore, the down-the-hole hammer includes a down-the-hole hammer housing and a hammer body, and the down-the-hole hammer housing is provided with a plurality of down-the-hole hammer installation cavities for installing the hammer body and a high-pressure air chamber connected to the air outlet of the air flow regulating valve, the diversion air chamber is arranged on the outside of the high-pressure air chamber, a low-pressure diversion chamber is provided on one side of the diversion air chamber, a plurality of diversion holes are provided between the diversion air chamber and the low-pressure diversion chamber, and an exhaust channel connected to the low-pressure diversion chamber is provided on the periphery of the down-the-hole hammer installation cavity.

[0017] When the present invention is in use, under the action of the linkage mechanism, all valve plates move in the same direction at the same time, the regulating valve plates open at the same time, and the high-pressure gas inside the drill rod is diverted to the low-pressure diversion air chamber, which plays a role in regulating the airflow pressure and flow of the down-the-hole hammer. The beneficial effect produced thereby is that the present invention can ensure the timely adjustment of the airflow when the clustered down-the-hole hammer is drilling and rock drilling in different formations, thereby improving the rock drilling efficiency and saving energy consumption. The entire linkage structure operating structure within the airflow regulating valve is easy to load and unload, and the corresponding exhaust channel is set only by relying on the structure of the down-the-hole hammer shell itself, without the need for additional components, and the structural design is reasonable and compact. Description of the drawings:

[0018] Figure 1 This is a structural diagram of the present invention.

[0019] Figure 2 It is a structural diagram of the air flow regulating valve in the present invention.

[0020] Figure 3 It is a cross-sectional view of the airflow regulating valve in the present invention.

[0021] Figure 4 It is a structural diagram of the linkage mechanism on the intermediate cylinder in the present invention.

[0022] Figure 5 It is a planar structural diagram of the linkage mechanism on the inner cylinder in the present invention.

[0023] Figure 6 It is a three-dimensional structural diagram of the linkage mechanism on the inner cylinder in the present invention.

[0024] Figure 7 It is a structural diagram of the linkage mechanism in the present invention.

[0025] Figure 8 It is a structural diagram of the linkage mechanism in the present invention.

[0026] Fig. 9 It is a cross-sectional view of the down-the-hole hammer housing in the present invention.

[0027] In the figure:

[0028] 1-drill pipe, 2-air flow regulating valve, 4-down-the-hole hammer housing, 5-hammer body.

[0029] 23- linkage mechanism, 24- valve plate, 25- outer cylinder, 26- inner cylinder, 28- middle cylinder, 200- air flow adjustment hole.

[0030] 231 - driving arm, 232 - rotating shaft, 233 - outer driving rod, 234 - inner driving rod, 235 - connecting rod, 236 - actuator, 237 - linkage rod, 31 - bearing seat.

[0031] 42-down-the-hole hammer installation chamber, 43-exhaust channel, 44-high-pressure diversion chamber, 45-low-pressure diversion chamber, 46-diversion hole, 47-diversion air chamber, 48-high-pressure air chamber. Specific implementation method:

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 9 The present invention discloses a cluster down-the-hole hammer, comprising a drill rod 1 and a down-the-hole hammer connected to the drill rod. A main air inlet 11 is provided on the drill rod 1, and a high-pressure air chamber 48 connected to the main air inlet 11 is provided on the down-the-hole hammer. The high-pressure gas in the main air inlet 11 enters the high-pressure air chamber 48 and causes the down-the-hole hammer to operate.

[0034] In order to regulate the airflow coming out of the main air inlet 11, the present invention arranges an airflow regulating valve 2 between the drill pipe 1 and the down-the-hole hammer, and is provided with a valve plate 24 and an airflow regulating hole 200 on the airflow regulating valve 2. The valve plate 24 closes the airflow regulating hole 200. The air inlet of the airflow regulating valve 2 is connected to the main air inlet 11, and the air outlet is connected to the high-pressure air chamber 48. A diversion air chamber 47 is provided on the down-the-hole hammer. The opening and closing degree of the valve plate 24 on the airflow regulating hole 200 is adjusted, so that the high-pressure gas in the main air inlet 11 is diverted to the diversion air chamber 47, thereby realizing the regulation of the airflow.

[0035] The airflow regulating valve 2 of the present invention comprises an inner cylinder 26, an intermediate cylinder 28 and an outer cylinder 25 which are coaxially arranged from inside to outside. The inner cylinder 26, the intermediate cylinder 28 and the outer cylinder 25 are fixedly connected by two flange surfaces 20, wherein the two ends of the inner cylinder 26 form the air inlet and the air outlet of the airflow regulating valve 2, and a plurality of airflow regulating holes 200 are evenly distributed on the circumferential surface of the inner cylinder 26, and one side of each airflow regulating hole 200 is slidably connected to a valve plate 24. The cavity formed between the inner wall surface of the intermediate cylinder 28 and the outer wall surface of the inner cylinder 26 is connected to the diversion air chamber 47.

[0036] A linkage mechanism 23 for driving all valve plates 24 to move in the same direction simultaneously is provided on the outer wall of the intermediate cylinder 28. The linkage mechanism of the present invention is described in detail below.

[0037] The linkage mechanism 23 of the present invention includes a rotating shaft 232 , an outer driving rod 233 , an inner driving rod 234 , a connecting rod 235 , an actuator 236 and a linkage rod 237 .

[0038] A plurality of rotating shafts 232 are rotatably connected to the outer wall of the intermediate cylinder 28 at a certain interval, and the axis of the rotating shaft 232 is perpendicular to the axis of the intermediate cylinder 28. The two ends of the rotating shaft 232 are respectively placed on the inner and outer sides of the intermediate cylinder 28. An inner driving rod 234 and an outer driving rod 233 are respectively fixed on the inner and outer sides of each rotating shaft 232. A linkage rod 237 is hinged between two adjacent outer driving rods 233, and all the outer driving rods 233 are linked through the linkage rod 237.

[0039] A connecting rod 235 is hinged on each inner driving rod 234, and each connecting rod 235 is hinged to a corresponding valve plate 24. At least two actuators 236 are hinged on the outer wall of the intermediate cylinder 28, and the output shaft of the actuator 236 is connected to a rotating shaft 232 at a corresponding position.

[0040] The actuator 236 in the present invention is a cylinder. To facilitate the connection between the actuator 236 and the rotating shaft 232, a driving arm 231 is hinged on the output shaft of the actuator 236, and the driving arm 231 is fixedly connected to the rotating shaft 232 at a corresponding position.

[0041] To facilitate the rotational installation of the rotating shaft 232, a number of installation through holes are evenly distributed on the outer wall of the intermediate cylinder 28, and a number of rectangular limit seats 262 are welded on the outer wall of the inner cylinder 26. A limit block 32 is clamped on each limit seat 262, and a bearing seat 31 is fixed in each installation through hole. The two ends of each rotating shaft 232 are rotatably connected to the bearing seat 31 and the limit block 32 at the corresponding position.

[0042] The two ends of the rotating shaft 232 correspond to the intermediate cylinder 28 and the inner cylinder 26, which are detachable installation structures, that is, the bearing seat 31 is fixedly connected to the intermediate cylinder 28 by screws, and the limit block 32 is stuck in the limit seat 262. The whole structure is easy to load and unload, easy to repair, and has good structural stability.

[0043] The airflow regulating hole 200 is a rectangular hole structure. To facilitate the sliding connection of the valve plate 24 to the airflow regulating hole 200 , sliding ribs 261 are provided on the upper and lower sides of each airflow regulating hole 200 , and the valve plate 24 is slidably connected to the sliding ribs 261 .

[0044] To achieve the sliding assembly of the valve plate 24 on the sliding ribs 261 , the upper and lower ends of the valve plate 24 are bent 90 degrees to form sliding edges 241 , and the two sliding edges 241 are correspondingly placed on the two sliding ribs 261 on both sides of each airflow adjustment hole 200 .

[0045] The down-the-hole hammer of the present invention comprises a down-the-hole hammer housing 4 and a hammer body 5 . The down-the-hole hammer housing 4 is provided with a plurality of down-the-hole hammer installation cavities 42 for installing the hammer body 5 and a high-pressure air chamber 48 connected to the air outlet of the air flow regulating valve 2 .

[0046] The diversion air chamber 47 is arranged on the outside of the high-pressure air chamber 48, and a low-pressure diversion chamber 45 is provided on one side of the diversion air chamber 47. A plurality of diversion holes 46 are provided between the diversion air chamber 47 and the low-pressure diversion chamber 45. An exhaust channel 43 connected to the low-pressure diversion chamber 45 is provided on the periphery of the down-the-hole hammer installation chamber 42, and the end of the exhaust channel 43 extends all the way to the bottom surface of the down-the-hole hammer housing 4.

[0047] When the present invention is in use, under the action of the linkage mechanism, all valve plates move in the same direction at the same time, the regulating valve plates open at the same time, and the high-pressure gas inside the drill pipe is diverted to the low-pressure diversion air chamber, which plays a role in regulating the airflow pressure and flow of the down-the-hole hammer. The present invention can ensure the timely adjustment of the airflow when the cluster down-the-hole hammer is drilling and rock drilling in different formations, thereby improving the rock drilling efficiency and saving energy consumption. The entire linkage structure operating structure in the airflow regulating valve is easy to load and unload, and the corresponding exhaust channel is set only by relying on the structure of the down-the-hole hammer shell itself, without the need for additional components, and the structural design is reasonable and compact.

[0048] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A cluster down-the-hole hammer, comprising a drill rod (1) and a down-the-hole hammer connected to the drill rod, wherein a main air inlet (11) is provided on the drill rod (1), and a high-pressure air chamber (48) connected to the main air inlet (11) is provided on the down-the-hole hammer, characterized in that: An airflow regulating valve (2) having a valve plate (24) and an airflow regulating hole (200) is arranged between the drill pipe (1) and the down-the-hole hammer, wherein the valve plate (24) closes the airflow regulating hole (200), an air inlet of the airflow regulating valve (2) is connected to the main air inlet passage (11), and an air outlet is connected to the high-pressure air chamber (48), and a diversion air chamber (47) is arranged on the down-the-hole hammer, and the opening and closing degree of the valve plate (24) on the airflow regulating hole (200) is adjusted so that the high-pressure gas in the main air inlet passage (11) is diverted to the diversion air chamber (47); The airflow regulating valve (2) comprises an inner cylinder (26), an intermediate cylinder (28) and an outer cylinder (25) which are coaxially arranged inside and outside, two ends of the inner cylinder (26) form an air inlet and an air outlet of the airflow regulating valve (2), a plurality of airflow regulating holes (200) are evenly distributed on the circumferential surface of the inner cylinder (26), and a cavity formed between the inner wall surface of the intermediate cylinder (28) and the outer wall surface of the inner cylinder (26) is connected to the diversion air chamber (47); A valve plate (24) is provided at each airflow adjustment hole (200); A linkage mechanism (23) is provided on the outer wall of the intermediate cylinder (28) for driving all valve plates (24) to move in the same direction simultaneously; The linkage mechanism (23) comprises a rotating shaft (232), an outer driving rod (233), an inner driving rod (234), a connecting rod (235), an actuator (236) and a linkage rod (237). A plurality of rotating shafts (232) are rotatably connected to the outer wall of the intermediate cylinder (28) at a certain interval, and the axis of the rotating shaft (232) is perpendicular to the axis of the intermediate cylinder (28). The two ends of the rotating shaft (232) are respectively placed on the inner and outer sides of the intermediate cylinder (28). An inner driving rod (234) and an outer driving rod (233) are fixed on the inner and outer sides respectively; a linkage rod (237) is hinged between two adjacent outer driving rods (233); a connecting rod (235) is hinged on each inner driving rod (234); each connecting rod (235) is hinged to a corresponding valve plate (24); at least two actuators (236) are hinged on the outer wall of the intermediate cylinder (28); and the output shaft of the actuator (236) is connected to a rotating shaft (232) at a corresponding position.

2. The cluster down-the-hole hammer according to claim 1, characterized in that: The actuator (236) is an oil cylinder, and a driving arm (231) is hinged on the output shaft of the actuator (236), and the driving arm (231) is fixedly connected to a rotating shaft (232) at a corresponding position.

3. The cluster down-the-hole hammer according to claim 1, characterized in that: A plurality of mounting through holes are evenly distributed on the outer wall of the intermediate cylinder (28); a plurality of rectangular limit seats (262) are welded on the outer wall of the inner cylinder (26); a limit block (32) is clamped on each limit seat (262); a bearing seat (31) is fixed in each mounting through hole; and both ends of each rotating shaft (232) are rotatably connected to the bearing seat (31) and the limit block (32) at corresponding positions.

4. The cluster down-the-hole hammer according to claim 1, characterized in that: The airflow regulating holes (200) are rectangular hole structures, and sliding ribs (261) are provided on the upper and lower sides of each airflow regulating hole (200), and the valve plate (24) is slidably connected to the sliding ribs (261).

5. The cluster down-the-hole hammer according to claim 4, characterized in that: The upper and lower ends of the valve plate (24) are bent at 90 degrees to form sliding edges (241), and the two sliding edges (241) are correspondingly placed on two sliding ribs (261) on both sides of each airflow adjustment hole (200).

6. The cluster down-the-hole hammer according to claim 1, characterized in that: The down-the-hole hammer comprises a down-the-hole hammer housing (4) and a hammer body (5). The down-the-hole hammer housing (4) is provided with a plurality of down-the-hole hammer installation chambers (42) for installing the hammer body (5) and a high-pressure air chamber (48) connected to an air outlet in an air flow regulating valve (2). The diverter air chamber (47) is arranged outside the high-pressure air chamber (48), a low-pressure diverter chamber (45) is arranged on one side of the diverter air chamber (47), a plurality of diverter holes (46) are arranged between the diverter air chamber (47) and the low-pressure diverter chamber (45), and an exhaust passage (43) connected to the low-pressure diverter chamber (45) is arranged outside the down-the-hole hammer installation chamber (42).

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