Flushing device for hydraulic rock drill

Abstract

The utility model relates to the technical field of rock drills, in particular to a flushing device for a hydraulic rock drill, which comprises a shell, a cleaning head assembly and a bit shank, the shell is provided with a first through hole and a cavity which are communicated with each other, the cleaning head assembly partially penetrates through the first through hole, and the bit shank is arranged in the cavity. The cavity is used for containing the cleaning head assembly, the part, located in the cavity, of the cleaning head assembly is provided with a containing channel, the two sides of the cavity are provided with a second through hole and a third through hole respectively, the bit shank sequentially penetrates through the second through hole, the containing channel and the third through hole, and the two ends of the bit shank are located outside the shell. A first sealing piece is arranged between the inner wall of the containing channel and the bit shank, a first gap is formed between the cleaning head assembly and the inner circumferential wall of the first through hole, a second gap is formed between the cleaning head assembly and the bottom of the cavity, and the cleaning head assembly is provided with a first circulation channel.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rock drills, and in particular to a flushing device for a hydraulic rock drill. Background Art

[0002] A hydraulic rock drill is a kind of rock drilling machine with an independent rotary mechanism, which uses high-pressure oil as power to push the piston to impact the drill bit. The hydraulic rock drill is a necessary equipment in civil engineering, used for drilling rocks in mining and geological fields, etc. The hydraulic rock drill contains an impact mechanism, a buffer mechanism, a rotary mechanism, etc. A reasonable hydraulic rock drill mechanism design can improve the working efficiency of the hydraulic rock drill and extend its service life. When the hydraulic rock drill is working, the piston makes high-frequency reciprocating motion, continuously impacting the drill tail. Under the action of the impact force, the sharp wedge-shaped drill head crushes the rock and drills it into a certain depth, forming a dent. After the piston retreats, the drill bit turns a certain angle, and the piston moves forward. When it impacts the drill tail again, a new dent is formed. The fan-shaped rock block between the two dents is sheared by the horizontal component force generated by the drill head. The piston continuously impacts the drill tail, and continuously inputs compressed air or pressure water from the center hole of the drill bit to discharge the rock slag out of the hole, that is, a circular drill hole of a certain depth is formed.

[0003] Patent application No. 2013800604698 discloses a device related to a flushing head for a rock drill and a rock drill. The cleaning head in the patent application is fixed to the machine housing by bolts. However, when the rock drill is working, the drill tail continuously reciprocates and the drill rod continuously swings, which causes the machine housing to vibrate to varying degrees. Over time, the bolts used to fix the cleaning head will loosen and fail, thereby affecting the normal operation of the rock drill. Utility Model Content

[0004] In view of the deficiencies or problems existing in the prior art, the present invention provides a flushing device for a hydraulic rock drill, which has reliable operation.

[0005] The technical solution adopted by the present disclosure to solve the above technical problems is: a flushing device for a hydraulic rock drill, comprising a shell, a cleaning head assembly and a shank, the shell being provided with a first through hole and a cavity which are interconnected, the cleaning head assembly partially passes through the first through hole, the cavity is used to accommodate the cleaning head assembly, the part of the cleaning head assembly located in the cavity is provided with an accommodating channel, the two sides of the cavity are respectively provided with a second through hole and a third through hole, the shank passes through the second through hole, the accommodating channel and the third through hole in sequence, and the two ends of the shank are located outside the shell, a first sealing member is provided between the inner wall of the accommodating channel and the shank, a first gap is provided between the cleaning head assembly and the inner peripheral wall of the first through hole, a second gap is provided between the cleaning head assembly and the bottom of the cavity, the cleaning head assembly is provided with a first circulation channel, the shank is provided with a second circulation channel, and the first circulation channel and the second circulation channel are interconnected.

[0006] As a preferred embodiment, the cleaning head assembly includes a flushing head and a cover plate, the cover plate covers the first through hole, the cover plate is provided with a fourth through hole, the flushing head is provided with a first connecting section and a second connecting section, the first circulation channel is provided in the first connecting section, the first connecting section passes through the fourth through hole, and the second connecting section is provided in the cavity.

[0007] As a preferred embodiment, the cover plate includes a top plate and four side plates, the first gap is a gap formed between the side plate and the inner peripheral wall of the first through hole; and a second sealing member is disposed in the first gap.

[0008] In some embodiments, the side plate is provided with a first groove, and the second sealing member is located in the first groove.

[0009] In some embodiments, the inner peripheral wall of the first through hole is provided with a second groove, and the second sealing member is located in the second groove.

[0010] Preferably, the second sealing member is an O-ring.

[0011] As a preferred embodiment, the second gap is a gap formed between the bottom of the second connecting section and the bottom of the cavity.

[0012] As a preferred embodiment, the second circulation channel includes a first channel and a second channel perpendicular to each other, the second channel is arranged along the length direction of the shank, and the first channel is arranged between the first circulation channel and the second channel; the first circulation channel is perpendicular to the second channel.

[0013] As a preferred embodiment, the first sealing member includes two sealing rings, which are respectively arranged on both sides of the first circulation channel.

[0014] As a preferred embodiment, the first sealing member further comprises two mechanical sealing members, and the two mechanical sealing members are respectively arranged on both sides of the two sealing rings.

[0015] As a preferred embodiment, the cleaning head assembly further comprises a connecting head, which is detachably connected to the first connecting section and is used to connect to a slag removal medium.

[0016] As a preferred embodiment, the connector is provided with a third circulation channel, and the third circulation channel is communicated with the first circulation channel.

[0017] Compared with the existing products, since the shank tail passes through the second through hole, the accommodating channel and the third through hole in sequence, and the two ends of the shank tail are located outside the shell, a first sealing member is provided between the inner wall of the accommodating channel and the shank tail, so that the shank tail limits part of the cleaning head assembly in the cavity, so that there is no need to use bolts or screws to fix the cleaning head assembly to the shell; a first gap is provided between the cleaning head assembly and the inner peripheral wall of the first through hole, and a second gap is provided between the cleaning head assembly and the bottom of the cavity. The setting of the first gap and the second gap allows a movable space to exist between the cleaning head assembly and the shell. When the shank tail is working, the cleaning head assembly will be affected by the shank tail to vibrate or shake, and the setting of the first gap and the second gap reserves space for the vibration or shaking of the cleaning head assembly, which can reduce the vibration or shaking of the cleaning head assembly when the cleaning head assembly collides with the shell. On the one hand, it can reduce the noise generated, and on the other hand, it can provide a buffer for the cleaning head assembly when it vibrates, preventing the shell from generating strong vibration when colliding with the cleaning head assembly; the cleaning head assembly is affected by the shank and generates vibration or shaking, and because a first gap is provided between the cleaning head assembly and the inner peripheral wall of the first through hole, and a second gap is provided between the cleaning head assembly and the bottom of the cavity, this makes the cleaning head assembly in a floating state when the shank is working, and at the same time, the shank limits part of the cleaning head assembly in the cavity, so that the cleaning head assembly can be relatively stably connected to the shell. Therefore, the cleaning head assembly no longer needs to be fixed to the shell with traditional bolts. Instead, the cleaning head assembly and the shell are in a "dynamic connection", which makes the structure of the flushing device simpler, and there is no problem of loose bolts affecting the operation of the flushing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1It is a structural schematic diagram of a flushing device for a hydraulic rock drill disclosed in the present invention;

[0020] Figure 2 is a cross-sectional view of a flushing device for a hydraulic rock drill disclosed herein;

[0021] Figure 3 This disclosure Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4 This disclosure Figure 2 A partial enlarged view of point B in the middle;

[0023] Figure 5 is a schematic diagram of the structure of the housing disclosed in the present invention;

[0024] Figure 6 is a schematic diagram of the structure of the cover plate disclosed in the present invention;

[0025] Figure 7 It is a schematic structural diagram of the flushing head disclosed in the present invention.

[0026] Description of reference numerals:

[0027] 1. Shell; 2. Cover plate; 3. Flushing head; 4. Connecting head; 5. Brazing tail; 6. First circulation channel; 7. First channel; 8. Second channel; 9. Third circulation channel; 10. Bushing; 11. First gap; 12. Second gap; 13. Second sealing member; 14. First through hole; 15. Second through hole; 16. Fourth through hole; 17. Sealing ring; 18. Mechanical sealing member; 19. Top plate; 20. Side plate; 21. First slot; 23. First connecting section; 24. Second connecting section; 25. Accommodating channel. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0030] Please see Figure 1 to Figure 5As shown, an embodiment of the present disclosure provides a flushing device for a hydraulic rock drill, including a shell 1, a cleaning head assembly and a shank 5, the shell 1 is provided with a first through hole 14 and a cavity that are interconnected, the cleaning head assembly partially passes through the first through hole 14, the cavity is used to accommodate the cleaning head assembly, the part of the cleaning head assembly located in the cavity is provided with an accommodating channel 25, the two sides of the cavity are respectively provided with a second through hole 15 and a third through hole, the shank 5 passes through the second through hole 15, the accommodating channel 25 and the third through hole in sequence, and the two ends of the shank 5 are located outside the shell 1, so that the shank 5 limits the cleaning head assembly part in the cavity, so that there is no need to use bolts or screws to fix the cleaning head assembly to the shell 1, a first sealing member is provided between the inner wall of the accommodating channel 25 and the shank 5, a first gap 11 is provided between the cleaning head assembly and the inner peripheral wall of the first through hole 14, a second gap 12 is provided between the cleaning head assembly and the bottom of the cavity, the cleaning head assembly is provided with a first circulation channel 6, the shank 5 is provided with a second circulation channel, and the first circulation channel 6 is interconnected with the second circulation channel. When the shank 5 is working, the cleaning head assembly will be affected by the shank 5 and will vibrate or shake. The setting of the first gap 11 and the second gap 12 reserves space for the vibration or shaking of the cleaning head assembly. On the one hand, it can reduce the noise generated when the cleaning head assembly collides with the shell 1, and on the other hand, it provides a buffer for the cleaning head assembly when it vibrates, preventing the shell 1 from generating a strong vibration when it collides with the cleaning head assembly. The cleaning head assembly is in a floating state when the shank 5 is working, and the shank 5 limits part of the cleaning head assembly in the cavity, so that the cleaning head assembly can be relatively stably connected to the shell 1. Therefore, the cleaning head assembly no longer needs to be fixed to the shell 1 with traditional bolts. Instead, the cleaning head assembly and the shell 1 are in a "dynamic connection", which makes the structure of the flushing device simpler, and there is no problem of loose bolts affecting the operation of the flushing device. When the hydraulic rock drill is working, it is often necessary to deliver a slag removal medium, such as water or compressed gas, to the drill tail 5 and the drill pipe. The first circulation channel 6 and the second circulation channel are provided for delivering the slag removal medium. The drill pipe is connected to the second circulation channel, and the slag removal medium passes through the first circulation channel 6 and the second circulation channel to reach the drill pipe. The first seal plays a sealing role on the one hand to prevent leakage of the slag removal medium, and on the other hand, the first seal also plays a limiting role on the cleaning head assembly, so that the connection between the cleaning head assembly and the drill tail 5 is tighter, so as to better "fix" the cleaning head assembly.

[0031] In order to better limit the flushing head 3 in the cavity, bushings 10 are respectively provided in the second through hole 15 and the third through hole. The bushings 10 are used to limit the flushing head 3 in the horizontal direction to prevent the flushing head 3 from shaking left and right in the cavity.

[0032] Please also see Figure 6 and 7As shown, further, the cleaning head assembly includes a flushing head 3 and a cover plate 2, the cover plate 2 covers the first through hole 14, the cover plate 2 is provided with a fourth through hole 16, the flushing head 3 is provided with a first connecting section 23 and a second connecting section 24, the first circulation channel 6 is provided in the first connecting section 23, the first connecting section 23 passes through the fourth through hole 16, and the second connecting section 24 is provided in the cavity. Covering the cover plate 2 on the first through hole 14 can prevent foreign matter from entering the cavity. The ends of the two bushings 10 are respectively fitted with the two ends of the second connecting section 24 to limit the horizontal direction thereof. The second gap 12 is the gap formed between the bottom of the second connecting section 24 and the bottom of the cavity.

[0033] In some embodiments, the connection between the cover plate 2 and the flushing head 3 is interference fit.

[0034] In some embodiments, the fourth through hole 16 is provided with an internal thread, and the first connecting section 23 is provided with an external thread, and the internal thread and the external thread are screwed together to connect the cover plate 2 and the flushing head 3 .

[0035] In some embodiments, the cover plate 2 is provided with a connecting groove, and the inner peripheral wall of the fourth through hole 16 is provided with a locking buckle, and the connecting groove and the locking buckle cooperate to clamp the cover plate 2 and the flushing head 3 together.

[0036] Please continue to see Figure 2 , Figure 3 and Figure 6 As shown, in one embodiment of the present disclosure, the cover plate 2 includes a top plate 19 and four side plates 20, the fourth through hole 16 is provided on the top plate 19, the first gap 11 is a gap formed between the side plate 20 and the inner peripheral wall of the first through hole 14; the second seal 13 is provided in the first gap 11. Specifically, the top plate 19 is an arc-shaped surface to adapt to the shape of the housing 1, the side plate 20 is provided with a first card groove 21, the second seal 13 is located in the first card groove 21, and the second seal 13 is an O-ring. The shank tail 5 will generate vibration during operation and then drive the vibration of the flushing head 3, and the vibration of the flushing head 3 drives the vibration of the cover plate 2. Since the direction of the vibration force is dispersed, it exists in the upper, lower, left and right directions, so it is necessary to set the first gap 11 and the second gap 12. The first gap 11 is provided to prevent the cover plate 2 from colliding with the opening of the housing 1 during vibration, and the second gap 12 prevents the second connecting section 24 from colliding with the bottom of the cavity. The second sealing member 13 is disposed in the first gap 11 , and can play a buffering role when the vibration is severe. The second sealing member 13 blocks the first gap 11 and can also prevent foreign matter from entering the cavity through the first gap 11 .

[0037] In one embodiment of the present disclosure, the first circulation channel 6 is connected with the accommodating channel 25 and is perpendicular to the accommodating channel 25. The second circulation channel includes a first channel 7 and a second channel 8 which are perpendicular to each other. The second channel 8 is arranged along the length direction of the shank 5. The first channel 7 is arranged between the first circulation channel 6 and the second channel 8. The first circulation channel 6 is perpendicular to the second channel 8. The conventional flushing head 3 is often provided with an oblique hole, which needs to be processed by unconventional means such as casting and electric spark, which makes the processing more cumbersome and inconvenient. The present disclosure sets the first circulation channel 6 as a straight hole, which can be processed by conventional means and is more convenient for processing.

[0038] Preferably, the first seal includes two sealing rings 17 and two mechanical seals 18, the two sealing rings 17 are respectively arranged on both sides of the first circulation channel 6, and the two mechanical seals 18 are respectively arranged on both sides of the two sealing rings 17. Specifically, two first annular recesses and two second annular recesses are arranged on the inner wall of the accommodating channel 25, the sealing ring 17 is arranged in the first annular recess, and the mechanical seal 18 is arranged in the second annular recess. The mechanical seal 18 here is connected to the shank 5 by conventional mechanical sealing means, and the specific structure and connection method of the mechanical seal 18 are all existing technologies, which will not be repeated here.

[0039] like Figure 2 As shown, in one embodiment of the present disclosure, the cleaning head assembly further includes a connector 4, which is detachably connected to the first connecting section 23, such as: snap-fitting or plug-in or threaded connection, and the connector 4 is used to connect the slag removal medium. The connector 4 is provided with a third circulation channel 9, which is connected to the first circulation channel 6, and the slag removal medium enters the first circulation channel 6, the first channel 7 and the second channel 8 in sequence from the third circulation channel 9, and finally flows to the drill pipe.

[0040] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A flushing device for a hydraulic rock drill, characterized in that: The invention comprises a shell (1), a cleaning head assembly and a shank (5), wherein the shell (1) is provided with a first through hole (14) and a cavity which are interconnected, the cleaning head assembly partially passes through the first through hole (14), the cavity is used to accommodate the cleaning head assembly, the part of the cleaning head assembly located in the cavity is provided with an accommodating channel (25), the two sides of the cavity are respectively provided with a second through hole (15) and a third through hole, the shank (5) passes through the second through hole (15), the accommodating channel (25) and the third through hole in sequence, and the two ends of the shank (5) are located outside the shell (1), a first sealing member is provided between the inner wall of the accommodating channel (25) and the shank (5), a first gap (11) is provided between the cleaning head assembly and the inner peripheral wall of the first through hole (14), a second gap (12) is provided between the cleaning head assembly and the bottom of the cavity, the cleaning head assembly is provided with a first circulation channel (6), the shank (5) is provided with a second circulation channel, and the first circulation channel (6) and the second circulation channel are interconnected.

2. The flushing device for a hydraulic rock drill according to claim 1, characterized in that: The cleaning head assembly comprises a flushing head (3) and a cover plate (2), wherein the cover plate (2) covers the first through hole (14), the cover plate (2) is provided with a fourth through hole (16), the flushing head (3) is provided with a first connecting section (23) and a second connecting section (24), the first circulation channel (6) is provided in the first connecting section (23), the first connecting section (23) passes through the fourth through hole (16), and the second connecting section (24) is provided in the cavity.

3. The flushing device for a hydraulic rock drill according to claim 2, characterized in that: The cover plate (2) comprises a top plate (19) and four side plates (20); the first gap (11) is a gap formed between the side plate (20) and the inner peripheral wall of the first through hole (14); and a second sealing member (13) is arranged in the first gap (11).

4. The flushing device for a hydraulic rock drill according to claim 3, characterized in that: The second sealing member (13) is an O-ring.

5. The flushing device for a hydraulic rock drill according to claim 1, characterized in that: The second gap (12) is a gap formed between the bottom of the second connecting section (24) and the bottom of the cavity.

6. The flushing device for a hydraulic rock drill according to claim 1, characterized in that: The second circulation channel comprises a first channel (7) and a second channel (8) which are perpendicular to each other. The second channel (8) is arranged along the length direction of the shank tail (5). The first channel (7) is arranged between the first circulation channel (6) and the second channel (8). The first circulation channel (6) is perpendicular to the second channel (8).

7. The flushing device for a hydraulic rock drill according to claim 1, characterized in that: The first sealing member comprises two sealing rings (17), and the two sealing rings (17) are respectively arranged on both sides of the first circulation channel (6).

8. The flushing device for a hydraulic rock drill according to claim 7, characterized in that: The first sealing component also includes two mechanical sealing components (18), and the two mechanical sealing components (18) are respectively arranged on both sides of the two sealing rings (17).

9. The flushing device for a hydraulic rock drill according to claim 2, characterized in that: The cleaning head assembly also includes a connecting head (4), the connecting head (4) being detachably connected to the first connecting section (23), and the connecting head (4) being used to connect a slag removal medium.

10. The flushing device for a hydraulic rock drill according to claim 9, characterized in that: The connecting head (4) is provided with a third circulation channel (9), and the third circulation channel (9) is communicated with the first circulation channel (6).

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