Pneumatic down-the-hole hammer head structure for hydraulically shearing rock pillar
By adopting a pneumatic down-the-hole hammer structure that hydraulically shears rock columns, and using the cooperation of the threaded connecting ring and the threaded fixing ring, the problem of easy falling off of the connection of the down-the-hole hammer head is solved, and the work efficiency is improved. Security and stability.
Patent Information
- Application Number
- CN202420959522.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-07
AI Technical Summary
During the long-term crushing work of existing submersible hammer heads, vibrations are prone to cracks at the connections, causing the submersible hammer head to fall off, affecting work safety.
It adopts a pneumatic down-the-hole hammer head structure that hydraulically shears rock columns. Through the cooperation of the threaded connecting ring on the outside of the down-the-hole hammer head and the threaded fixing ring inside the impactor shell, quick locking and fixation are achieved to enhance the connection firmness.
It effectively avoids the problem of the down-the-hole hammer head falling off during the crushing work, and improves the safety and stability of the work.
Smart Images
Figure CN222376391U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of down-the-hole hammers, in particular to a pneumatic down-the-hole hammer structure for hydraulically shearing rock columns. Background Art
[0002] The down-the-hole hammer is a component of the down-the-hole diamond rotary drilling rig. It is deeply loved by the public because of its good drilling effect and its ability to cope with the current situation of hard rock construction. The down-the-hole hammer is at the bottom of the drill pipe. The drilling rig drives the drill pipe to rotate, and the compressed air enters the down-the-hole hammer through the drill pipe to generate an impact force of a certain frequency to break the rock. At the same time, the exhaust gas is used to cool the hammer head and discharge the rock cuttings out of the hole.
[0003] Down-the-hole drills are widely used in mining, construction, exploration and deep hole fields. In the process of shearing and crushing rock pillars, down-the-hole hammers are also needed to work. At present, when the down-the-hole hammers are connected and installed with the impactor, they are usually connected by means of bayonet pins and clamping rings. However, during the long-term crushing process, the connection between the two is prone to vibration and gaps, which will cause the down-the-hole hammer to fall off during subsequent crushing, affecting the safety of the down-the-hole hammer. For this reason, we propose a pneumatic down-the-hole hammer structure for hydraulic shearing of rock pillars to solve the above problems. Utility Model Content
[0004] The utility model aims to provide a pneumatic down-the-hole hammer structure for hydraulically shearing rock columns, so as to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A pneumatic down-the-hole hammer structure for hydraulically shearing a rock column comprises an impactor shell, a down-the-hole hammer is arranged below the impactor shell, a threaded connecting ring is fixedly connected to the outer surface of the down-the-hole hammer, a threaded fixing ring is fixedly connected to the inner ring of the impactor shell, the outer surface of the threaded connecting ring is threadedly connected to the inner ring of the threaded fixing ring, an annular concave hole is provided on the outer surface of the threaded connecting ring, an annular groove is provided on the outer surface of the impactor shell, a threaded hole is provided on the inner side wall of each groove, a fixing screw is threadedly connected to the inner wall of each threaded hole, and one end of each fixing screw close to each other is in close contact with the inner wall of the annular concave hole, and two exhaust holes are provided on the bottom surface of the down-the-hole hammer.
[0007] In a further embodiment, the outer surface of the impactor shell is provided with threads, and the outer surface of the impactor shell is threadedly connected to a protective cover.
[0008] In a further embodiment, an annular limiting plate is fixedly connected to the bottom end of the impactor shell, and the bottom end of the protective cover is in contact with the upper surface of the annular limiting plate.
[0009] In a further embodiment, a buffer pad is fixedly connected to the top end of the threaded connection ring, and the upper surface of the buffer pad is in contact with the bottom end of the threaded fixing ring.
[0010] In a further embodiment, a reinforcement plate is fixedly connected to the inner wall of the impactor shell, and a through hole is formed on the upper surface of the reinforcement plate.
[0011] In a further embodiment, a rotating plate is fixedly connected to the outer surface of the threaded connection ring, and a plurality of crushing heads are fixedly connected to the bottom surface of the down-the-hole hammer.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] The device uses a threaded connecting ring provided on the outside of the submerged hole hammer and cooperates with a threaded fixing ring on the inside of the impactor shell to enable threaded connection between the threaded connecting ring and the threaded fixing ring, which will speed up the connection speed between the submerged hole hammer and the impactor shell and facilitate deep locking and fixing thereof. Through multiple threaded holes and fixing screws provided on the impactor shell and cooperation with the annular recessed holes on the outside of the threaded fixing ring, the outside of the threaded connecting ring can be quickly locked and fixed, thereby firmly connecting the submerged hole hammer and the impactor shell, avoiding the problem of the submerged hole hammer falling off due to long-term crushing operation, and improving the safety of the submerged hole hammer during crushing operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the front view of the pneumatic down-the-hole hammer head structure for hydraulically shearing rock columns.
[0015] Figure 2 It is a three-dimensional structural schematic diagram of the bottom view of the pneumatic down-the-hole hammer structure for hydraulically shearing rock columns.
[0016] Figure 3 A partial cross-sectional view of the front view of the impactor shell in a pneumatic down-the-hole hammer structure for hydraulically shearing a rock column.
[0017] Figure 4 Pneumatic down-the-hole hammer structure for hydraulic shearing of rock columns Figure 3 Schematic diagram of the structure with a partial enlargement at point A in the middle.
[0018] In the figure: 1. impactor shell; 2. submerged-hole hammer; 3. threaded connecting ring; 4. threaded fixing ring; 5. annular recessed hole; 6. threaded hole; 7. fixing screw; 8. groove; 9. protective cover; 10. reinforcement plate; 11. through hole; 12. exhaust hole; 13. buffer pad; 14. crushing head; 15. rotating plate; 16. annular limit plate. DETAILED DESCRIPTION
[0019] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-4In the utility model, a pneumatic down-the-hole hammer structure for hydraulically shearing rock columns comprises an impactor shell 1, a down-the-hole hammer 2 is arranged below the impactor shell 1, a threaded connection ring 3 is fixedly connected to the outer surface of the down-the-hole hammer 2, a threaded fixing ring 4 is fixedly connected to the inner ring of the impactor shell 1, the outer surface of the threaded connection ring 3 is threadedly connected to the inner ring of the threaded fixing ring 4, an annular concave hole 5 is opened on the outer surface of the threaded connection ring 3, an annularly arranged groove 8 is opened on the outer surface of the impactor shell 1, a threaded hole 6 is opened on the inner side wall of each groove 8, and the inner wall of each threaded hole 6 They are all threadedly connected with fixing screws 7, and the ends of each fixing screw 7 that are close to each other are in close contact with the inner wall of the annular recessed hole 5. Two exhaust holes 12 are provided on the bottom surface of the submerged hole hammer 2. Through the setting of the exhaust holes 12, compressed air can enter the interior of the submerged hole hammer 2, and then generate an impact force of a certain frequency to crush the rock. At the same time, the discharged exhaust gas is used to cool the submerged hole hammer 2, and the cut rock chips are discharged out of the hole. Through the cooperation of the annular recessed hole 5, the groove 8 and the fixing screws 7, the fixation between the submerged hole hammer 2 and the impactor shell 1 is deepened.
[0023] A thread is provided on the outer surface of the impactor shell 1, and a protective cover 9 is threadedly connected to the outer surface of the impactor shell 1. An annular limit plate 16 is fixedly connected to the bottom end of the impactor shell 1, and the bottom end of the protective cover 9 contacts the upper surface of the annular limit plate 16. A buffer pad 13 is fixedly connected to the top of the threaded connection ring 3, and the upper surface of the buffer pad 13 contacts the bottom end of the threaded fixing ring 4. Through the setting of the protective cover 9, the fixing screws 7 and the groove 8 can be protected, which will reduce the entry of dust and debris. The setting of the annular limit plate 16 can play a role in blocking the protective cover 9 when it rotates downward, thereby avoiding the problem of rotation and falling off.
[0024] A reinforcing plate 10 is fixedly connected to the inner wall of the impactor shell 1, a through hole 11 is opened on the upper surface of the reinforcing plate 10, a rotating plate 15 is fixedly connected to the outer surface of the threaded connection ring 3, and a plurality of crushing heads 14 are fixedly connected to the bottom surface of the down-the-hole hammer 2. The reinforcement plate 10 is arranged to increase the overall strength of the interior of the impactor shell 1, the rotating plate 15 is used to facilitate the rotation of the threaded connection ring 3 and the down-the-hole hammer 2, and the crushing head 14 can improve the crushing effect of the down-the-hole hammer 2 on the rock column.
[0025] The working principle of the utility model is: when installing the submerged hole hammer 2 and the impactor shell 1, first take the submerged hole hammer 2, and slowly insert the top of the submerged hole hammer 2 into the interior of the impactor shell 1, then use the rotating plate 15 to rotate the submerged hole hammer 2, which will drive the threaded connection ring 3 to rotate inside the threaded fixing ring 4, so that the threaded connection ring 3 and the threaded fixing ring 4 can be threadedly connected, and then the submerged hole hammer 2 and the impactor shell 1 can be preliminarily connected, and then the fixing screw 7 is taken and rotated inside the threaded hole 6 until it is rotated to the inside of the annular recessed hole 5, which will quickly lock and fix the outside of the threaded connection ring 3, so that the submerged hole hammer 2 and the impactor shell 1 can be firmly connected.
[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A pneumatic down-the-hole hammer structure for hydraulically shearing rock columns, characterized in that: The invention comprises an impactor shell (1), wherein a submerged-hole hammer (2) is provided below the impactor shell (1), the outer surface of the submerged-hole hammer (2) is fixedly connected with a threaded connection ring (3), the inner ring of the impactor shell (1) is fixedly connected with a threaded fixing ring (4), the outer surface of the threaded connection ring (3) is threadedly connected with the inner ring of the threaded fixing ring (4), the outer surface of the threaded connection ring (3) is provided with an annular concave hole (5), the outer surface of the impactor shell (1) is provided with annular grooves (8), the inner side wall of each groove (8) is provided with a threaded hole (6), the inner wall of each threaded hole (6) is threadedly connected with a fixing screw (7), the end of each fixing screw (7) close to each other is in close contact with the inner wall of the annular concave hole (5), and the bottom surface of the submerged-hole hammer (2) is provided with two exhaust holes (12).
2. The pneumatic down-the-hole hammer structure for hydraulically shearing rock columns according to claim 1 is characterized by: The outer surface of the impactor shell (1) is provided with threads, and the outer surface of the impactor shell (1) is threadedly connected to a protective cover (9).
3. The pneumatic down-the-hole hammer structure for hydraulically shearing rock columns according to claim 2 is characterized by: The bottom end of the impactor shell (1) is fixedly connected to an annular limiting plate (16), and the bottom end of the protective cover (9) is in contact with the upper surface of the annular limiting plate (16).
4. The pneumatic down-the-hole hammer structure for hydraulically shearing rock columns according to claim 1 is characterized by: A buffer pad (13) is fixedly connected to the top end of the threaded connection ring (3), and the upper surface of the buffer pad (13) is in contact with the bottom end of the threaded fixing ring (4).
5. The pneumatic down-the-hole hammer structure for hydraulically shearing rock columns according to claim 1, characterized in that: A reinforcing plate (10) is fixedly connected to the inner wall of the impactor shell (1), and a through hole (11) is provided on the upper surface of the reinforcing plate (10).
6. The pneumatic down-the-hole hammer structure for hydraulically shearing rock columns according to claim 1, characterized in that: A rotating plate (15) is fixedly connected to the outer surface of the threaded connection ring (3), and a plurality of crushing heads (14) are fixedly connected to the bottom surface of the submerged-hole hammer head (2).