Anti-falling pneumatic down-the-hole hammer

Abstract

The utility model relates to the technical field of pneumatic down-the-hole hammers, and discloses an anti-falling pneumatic down-the-hole hammer which comprises a main body column, the main body column comprises a stand column and a connecting mechanism, the connecting mechanism comprises a drill rod and a down-the-hole drill bit, the drill rod is arranged in the center of the outer surface of the lower end of the stand column, and the down-the-hole drill bit comprises a main drill bit. Through the arrangement of the connecting mechanism, the two sides of the clamping block are clamped in the clamping hole and the clamping groove respectively during installation, main transverse torsion from the connecting column is borne by means of the material strength of the clamping block, the position of the connecting column is fixed through the two sets of fixing bolts, the connecting column is prevented from falling off, and the service life of the connecting column is prolonged. When the down-the-hole drill bit operates at a high load for a long time, the transverse bearing capacity and durability of the connecting mechanism cannot be reduced, the situation that the connecting column loosens or falls off is avoided, the using durability of the down-the-hole drill bit is facilitated, and the structural strength of equipment is improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic down-the-hole hammers; specifically, it is an anti-detachment pneumatic down-the-hole hammer. Background Technique

[0002] A pneumatic down-the-hole hammer is a pneumatic tool used for drilling operations. Using compressed air as the power source, it can perform drilling operations in restricted spaces. The reciprocating impact motion of the hammer head can effectively strike rocks or concrete to form holes. Pneumatic down-the-hole hammers are widely used in drilling operations in industries such as geological exploration, construction, and mining. It is a practical pneumatic tool that can meet various drilling requirements.

[0003] Chinese Patent Publication No. CN220909585U, which relates to the technical field of pneumatic down-the-hole hammers, discloses a pneumatic down-the-hole hammer, including a column, a shaft rod, a hammer block, a motor, and a hydraulic rod. A sealing plate is detachably installed at the top of the column. One side of the periphery of the sealing plate is fixedly installed with a discharge pump. The outer end of the connecting pipe at the input end of the discharge pump is detachably installed with a guide pipe. A placement groove is opened at the bottom of the column; in the utility model, a cavity structure is formed between the sealing plate at the top of the column and the top of the column. The discharge pump installed on the periphery of the sealing plate through a bracket can introduce concrete into the cavity and evenly diffuse it into the down-the-hole through a material groove. The hammer block can be connected to the bottom of the placement groove through a connecting flange by the contraction of the hydraulic rod, avoiding concrete from entering the placement groove, realizing that the concrete fills the inner wall of the down-the-hole around the periphery of the hammer block through the discharge ports on the periphery of the hammer block, thereby supporting the inner wall of the down-the-hole to prevent the inner wall of the down-the-hole from collapsing.

[0004] However, when this utility model is actually used, the following problems exist:

[0005] 1. For existing pneumatic down-the-hole hammers, the hammer head is generally connected by a flange. When the hammer head operates under high load for a long time, the lateral load-bearing capacity and durability of the flange connection may be relatively low, resulting in loosening or detachment of the hammer head, which is not conducive to the durability of the hammer head use and reduces the structural strength of the equipment to a certain extent.

[0006] 2. Most of the hammer heads of existing pneumatic down-the-hole hammers are crushing heads with a single structure, and most of them choose to set drill teeth. When encountering structures with too high hardness, the crushing efficiency of the hammer head may not reach the ideal state, resulting in a slowdown in the drilling speed or damage to the hammer head, which is not conducive to the rapid drilling of the equipment and affects the practicality of the equipment to a certain extent. Content of the Utility Model

[0007] In order to overcome the above-mentioned defects of the prior art, the utility model provides an anti-detachment pneumatic down-the-hole hammer to solve the problems existing in the above-mentioned background technique.

[0008] The present utility model provides the following technical solution: An anti-drop pneumatic down-the-hole hammer, comprising:

[0009] A main body column, the main body column including a vertical column;

[0010] A connecting mechanism, the connecting mechanism including a drill pipe, and the drill pipe is disposed inside the center of the lower end outer surface of the vertical column;

[0011] A down-the-hole drill bit, the down-the-hole drill bit including a main drill bit, and the outer surface of the upper end of the main drill bit is fixedly connected to the connecting mechanism.

[0012] Preferably, the main body column further includes a sealing block, and the sealing block is disposed on the outer surface of the upper end of the vertical column, and a discharge pump is installed on the outer surface of one end of the sealing block, and the crushed blocks at the bottom of the vertical column can be timely extracted through the discharge pump.

[0013] Preferably, the connecting mechanism further includes a limiting ring, and the inner surface of the limiting ring is fixedly connected to the lower end outer surface of the drill pipe, and engaging holes are formed on both sides of the lower end outer surface of the drill pipe, and the limiting ring can limit the fixed position of the connecting column.

[0014] Preferably, a clamping block is disposed inside the engaging hole, and the size of the outer surface of the clamping block is adapted to the size of the inner surface of the engaging hole, and a connecting column is sleeved on the outer surface of the lower end of the drill pipe, and the clamping block can drive the connecting column and the down-the-hole drill bit fixed on the connecting column to rotate, and bear the main rotational torque brought by the down-the-hole drill bit.

[0015] Preferably, engaging grooves are formed on both sides of the inner surface of the upper end of the connecting column, and the inner surface of the engaging groove is fitted with the outer surface of one side of the clamping block, and both sides of the clamping block are respectively clamped inside the engaging hole and the engaging groove, so that the connecting column can rotate following the drill pipe.

[0016] Preferably, fixing bolts are threadedly connected to both ends of the inner part of the upper end outer surface of the connecting column, and the outer surface of one end of the fixing bolt is threadedly connected to the inner part of the lower end outer surface of the drill pipe, and the outer surface of the upper end of the connecting column is fitted with the outer surface of the lower end of the limiting ring, and the connecting column is fixed on the drill pipe through two groups of fixing bolts to prevent the connecting column from falling off.

[0017] Preferably, the down-the-hole drill bit further includes auxiliary drill bits, and there are four groups of auxiliary drill bits, and the four groups of auxiliary drill bits are evenly arranged around the inner circumference of the bottom end outer surface of the main drill bit, and the auxiliary drill bits assist the main drill bit in crushing the rock layer, and enhance the crushing efficiency of the down-the-hole drill bit.

[0018] Preferably, discharge holes are provided inside both ends of the outer surface at the bottom end of the main drill bit, and a discharge groove is provided at a position inside the outer surface at the bottom end of the main drill bit on one side of the discharge hole. Moreover, a spiral rack is fixedly connected to the periphery of the outer surface of the main drill bit. There are multiple groups of spiral racks, and the direction of the spiral racks is adapted to the rotation direction of the down-the-hole drill bit, which can also assist the down-the-hole drill bit in crushing the rock layer and accelerating the advancing speed of the down-the-hole drill bit.

[0019] The technical effects and advantages of the present utility model:

[0020] 1. By setting the connection mechanism in the present utility model, when installing, both sides of the engaging block are respectively engaged inside the engaging hole and the engaging groove, so that the drill pipe can drive the connecting column to rotate. And relying on the material strength of the engaging block itself, it bears the main lateral torsion force from the connecting column. The position of the connecting column is fixed by two sets of fixing bolts to prevent the connecting column from falling off, and the fixing bolts bear a small part of the lateral torsion force from the connecting column. When the down-the-hole drill bit operates under high load for a long time, the lateral load-bearing capacity and durability of the connection mechanism will not decrease, avoiding the situation of loosening or falling off of the connecting column, which is beneficial to the durability of the use of the down-the-hole drill bit and improves the structural strength of the equipment to a certain extent.

[0021] 2. By setting the down-the-hole drill bit in the present utility model, drill teeth are also provided at the bottom of the down-the-hole drill bit, and four sets of auxiliary drill bits are provided to assist the main drill bit in crushing. The crushed fragments are sucked and discharged through the discharge holes and the discharge groove. The spiral rack also assists the main drill bit in crushing and advancing. When encountering a structure with too high hardness, the crushing efficiency of the down-the-hole drill bit will not decrease, avoiding the situation of slow drilling speed or damage to the down-the-hole drill bit, which is beneficial to the equipment for quickly drilling holes and improves the practicability of the equipment to a certain extent. Description of the Drawings

[0022] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model.

[0023] Figure 2 It is an exploded three-dimensional structure schematic diagram of the present utility model.

[0024] Figure 3 It is a three-dimensional structure schematic diagram of the main column of the present utility model.

[0025] Figure 4 It is an exploded three-dimensional structure schematic diagram of the connection mechanism of the present utility model.

[0026] Figure 5 It is an exploded three-dimensional structure schematic diagram of a part of the connection mechanism of the present utility model.

[0027] Figure 6 It is a three-dimensional structure schematic diagram of the down-the-hole drill bit of the present utility model.

[0028] The reference numerals are: 1, main body column; 11, column; 12, sealing block; 13, discharge pump; 2, connecting mechanism; 21, drill pipe; 22, limiting ring; 23, engaging hole; 24, engaging block; 25, connecting column; 26, engaging groove; 27, fixing bolt; 3, down-the-hole bit; 31, main bit; 32, auxiliary bit; 33, discharge hole; 34, discharge groove; 35, spiral rack. Detailed implementation manners

[0029] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of each structure described in the following implementation manners are only examples. An anti-detachment pneumatic down-the-hole hammer related to the present invention is not limited to the structures described in the following implementation manners. All other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] As Figures 1 to 5 shown, the present invention provides an anti-detachment pneumatic down-the-hole hammer, which includes a main body column 1. The main body column 1 includes a column 11. The main body column 1 further includes a sealing block 12, and the sealing block 12 is arranged on the outer surface of the upper end of the column 11. A discharge pump 13 is installed on the outer surface of one end of the sealing block 12. A negative pressure area is generated inside the discharge hole 33 through the discharge pump 13, so as to suck out the fragments and discharge them from the device.

[0032] A connecting mechanism 2, the connecting mechanism 2 includes a drill pipe 21, and the drill pipe 21 is arranged inside the center of the outer surface of the lower end of the column 11. The connecting mechanism 2 further includes a limiting ring 22, and the inner surface of the limiting ring 22 is fixedly connected to the lower end of the outer surface of the drill pipe 21. Engaging holes 23 are formed on both sides of the lower end of the outer surface of the drill pipe 21. The limiting ring 22 is mainly used to limit the position of the connecting column 25. When the upper surface of the connecting column 25 fits against the lower surface of the limiting ring 22, it is the fixed position of the connecting column 25, and the fixing bolt 27 can be rotatably installed inside the connecting column 25.

[0033] The inside of the engaging hole 23 is provided with an engaging block 24, and the size of the outer surface of the engaging block 24 is adapted to the size of the inner surface of the engaging hole 23. A connecting column 25 is sleeved on the outer surface of the lower end of the drill pipe 21. The engaging block 24 is made of 40Cr steel. 40Cr steel is a common alloy structural steel, and its main components are carbon and chromium. It has relatively high strength and hardness. After heat treatment, 40Cr steel can reach relatively high tensile strength and hardness, which makes it suitable for manufacturing parts that bear relatively high stress and wear. 40Cr steel is widely used in fields such as automotive parts, mechanical equipment, construction machinery, and wear-resistant parts. When manufacturing high-strength limit blocks, 40Cr steel is a very common and reliable choice;

[0034] On both sides of the upper end of the inner surface of the connecting column 25, engaging grooves 26 are opened, and the inner surface of the engaging groove 26 is fitted with the outer surface of one side of the engaging block 24. The outer surfaces on both sides of the engaging block 24 are respectively fitted inside the engaging hole 23 and the engaging groove 26, so as to drive the connecting column 25 and the drill pipe 21 to rotate synchronously, and bear the main lateral torsion force from the connecting column 25, which can ensure that the connecting mechanism 2 has sufficient structural strength;

[0035] At both ends of the upper end inside the outer surface of the connecting column 25, fixing bolts 27 are threadedly connected. The outer surface of one end of the fixing bolt 27 is threadedly connected with the inside of the lower end of the outer surface of the drill pipe 21. The outer surface of the upper end of the connecting column 25 is fitted with the outer surface of the lower end of the limiting ring 22. The down-the-hole drill bit 3 and the drill pipe 21 are connected by the connecting column 25 and rotate synchronously. The two fixing bolts 27 can prevent the connecting column 25 from falling off and bear the smaller lateral torsion force from the connecting column 25, increasing the structural strength of the connecting mechanism 2.

[0036] Embodiment 2

[0037] As Figure 1 and Figure 6 shown, this embodiment also proposes:

[0038] The down-the-hole drill bit 3, the down-the-hole drill bit 3 includes a main drill bit 31, and the outer surface of the upper end of the main drill bit 31 is fixedly connected with the connecting mechanism 2. The down-the-hole drill bit 3 is made of cemented carbide. Cemented carbide is a relatively important industrial ceramic material. Cemented carbide mainly has extremely high hardness, good compressive strength and wear resistance, relatively high toughness and thermal stability, and mature manufacturing processes, high cost performance, etc. It is widely used in fields such as cutting tools, metal forming dies, and mining equipment, and plays an important role in industrial production;

[0039] The down-the-hole bit 3 further includes four auxiliary bits 32 which are evenly arranged around the inner surface of the bottom end of the main bit 31. The four auxiliary bits 32 assist the main bit 31 in crushing the rock layer, enhancing the crushing efficiency of the down-the-hole bit 3 and preventing the down-the-hole bit 3 from getting stuck and damaged.

[0040] Discharge holes 33 are formed in the inner parts of both ends of the outer surface of the bottom end of the main bit 31. A discharge groove 34 is formed at a position on the inner surface of the outer surface of the bottom end of the main bit 31 on one side of the discharge hole 33. A plurality of helical racks 35 are fixedly connected around the outer surface of the main bit 31. The direction of the helical racks 35 is adapted to the rotation direction of the down-the-hole bit 3. It can also assist the down-the-hole bit 3 in crushing the rock layer, accelerating the advancing speed of the down-the-hole bit 3 and optimizing the crushing method of the down-the-hole bit 3.

[0041] Working principle: First, the down-the-hole bit 3 needs to be connected to the main column 1 through the connecting mechanism 2. The engaging block 24 is placed inside the engaging hole 23, the engaging groove 26 is aligned with the position of the engaging block 24, and the connecting column 25 is pushed until it fits against the lower surface of the limiting ring 22. The engaging block 24 is engaged inside the engaging groove 26, and then the fixing bolt 27 is rotated and screwed on for fixation.

[0042] Then, the down-the-hole bit 3 is aligned with the predetermined position, the column 11 and the discharge pump 13 are started, so that the drill pipe 21 drives the down-the-hole bit 3 to rotate. The bottom of the main bit 31 mainly crushes the rock layer, etc. At the same time, the four auxiliary bits 32 assist the main bit 31 in crushing. The discharge pump 13 creates negative pressure inside the discharge hole 33 and sucks and discharges the fragments in cooperation with the discharge groove 34. The helical racks 35 also assist the main bit 31 in crushing and advancing, working together. The above is the entire working principle of the present utility model.

[0043] Finally, several points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0044] Secondly: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0045] Finally: The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anti-falling pneumatic down-the-hole hammer, characterized in that: include: A main column (1), wherein the main column (1) comprises a vertical column (11); A connecting mechanism (2), the connecting mechanism (2) comprising a drill rod (21), and the drill rod (21) is arranged inside the center of the outer surface of the lower end of the column (11); A down-the-hole drill bit (3), the down-the-hole drill bit (3) comprising a main drill bit (31), and the outer surface of the upper end of the main drill bit (31) is fixedly connected to the connecting mechanism (2).

2. The anti-falling pneumatic down-the-hole hammer according to claim 1, characterized in that: The main column (1) also includes a sealing block (12), and the sealing block (12) is arranged on the outer surface of the upper end of the column (11), and a discharge pump (13) is installed on the outer surface of one end of the sealing block (12).

3. The anti-falling pneumatic down-the-hole hammer according to claim 1, characterized in that: The connection mechanism (2) further comprises a limiting ring (22), wherein the inner surface of the limiting ring (22) is fixedly connected to the lower end of the outer surface of the drill rod (21), and engaging holes (23) are provided on both sides of the lower end of the outer surface of the drill rod (21).

4. The anti-falling pneumatic down-the-hole hammer according to claim 3, characterized in that: A locking block (24) is arranged inside the locking hole (23), and the size of the outer surface of the locking block (24) matches the size of the inner surface of the locking hole (23), and a connecting column (25) is sleeved on the outer surface of the lower end of the drill rod (21).

5. The anti-falling pneumatic down-the-hole hammer according to claim 4, characterized in that: Both sides of the upper end of the inner surface of the connecting column (25) are provided with engaging grooves (26), and the inner surface of the engaging groove (26) is in contact with the outer surface of one side of the engaging block (24).

6. The anti-falling pneumatic down-the-hole hammer according to claim 4, characterized in that: Both ends of the inner upper end of the outer surface of the connecting column (25) are threadedly connected with fixing bolts (27), and the outer surface of one end of the fixing bolt (27) is threadedly connected to the inner lower end of the outer surface of the drill rod (21), and the outer surface of the upper end of the connecting column (25) is in contact with the outer surface of the lower end of the limiting ring (22).

7. The anti-falling pneumatic down-the-hole hammer according to claim 1, characterized in that: The down-the-hole drill bit (3) further comprises an auxiliary drill bit (32), and the auxiliary drill bits (32) are provided in four groups, and the four groups of the auxiliary drill bits (32) are evenly arranged around the inner periphery of the bottom end outer surface of the main drill bit (31).

8. The anti-falling pneumatic down-the-hole hammer according to claim 7, characterized in that: Both ends of the outer surface of the bottom end of the main drill bit (31) are provided with discharge holes (33), and one side of the discharge hole (33) is provided with a discharge groove (34) located inside the outer surface of the bottom end of the main drill bit (31), and a spiral rack (35) is fixedly connected to a circle of the outer surface of the main drill bit (31), and the spiral rack (35) is provided in multiple groups.

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