Rock drill

Abstract

The utility model discloses a rock drill, relates to the technical field of rock drills, and solves the problem that other structures of the rock drill are easily polluted after water leakage due to the fact that a flushing system is integrated on a machine head in the prior art. The rock drill comprises a guide frame, the guide frame is arranged on a base body in a sliding mode, a rock drill body and a flushing system are respectively and fixedly arranged on the guide frame, a machine head assembly is arranged at the front end of the rock drill body and connected with the end of a drill rod, and the flushing system is communicated with an inner hole of the drill rod. The guide frame is arranged, a supporting foundation capable of sliding for construction is provided, the rock drill body and the flushing system are arranged on the guide frame, and the flushing system and a machine head assembly of the rock drill body are designed in a split mode, so that when the water leakage phenomenon occurs, use of the rock drill body is not affected any more, and the risk caused by sealing damage is reduced. Meanwhile, the flushing system and the machine head assembly are designed in a split mode, the overall weight and size of the rock drill body can be reduced, and assembling and moving are convenient.

Description

Technical Field

[0001] This utility model relates to the field of rock drill technology, and in particular to a rock drill. Background Technology

[0002] Rock drills are a key component of tunnel boring equipment. They break up rock using the high-frequency impact of the drill bit, and then flush out the rock debris with flushing water to achieve the drilling purpose. Currently, the flushing system of most products is integrated into the rock drill head. This increases the overall size and weight of the rock drill and also introduces certain operational risks. Specifically, if the flushing system seal fails, flushing water can easily enter other structures, accelerating damage to other components and reducing the lifespan of the rock drill. Furthermore, during drilling, the drill bit impacts the intact rock block at high speed and frequency, leading to excessively rapid wear and tear on the drill bit and extremely low drilling efficiency.

[0003] The invention patent with publication number CN115680475A discloses a structure with a water leakage warning hole at the head of the rock drill. During use, when the flushing system's seal fails and a leak occurs, the leaking water will be discharged through the leakage hole. The purpose is to help workers detect leaks promptly and perform timely maintenance, reducing the impact of leaking water on the rock drill's operation. However, this design still places the flushing device on the head, increasing the overall size and weight of the rock drill. Furthermore, in actual operation, on-site personnel cannot clearly observe the water leakage at the warning hole in real time; by the time they notice it, the leakage is often severe and has spread to other systems.

[0004] The invention patent with publication number CN118257491A discloses a design that involves opening a hole in the head housing and then installing a flushing system in the hole. This structure can ensure that leaked water will not enter other structures after the seal fails. However, this design also places the flushing device on the head, increasing the overall size and weight of the rock drill.

[0005] In summary, existing designs cannot achieve an independent flushing system, are ineffective in reducing the overall size and weight of the rock drill and mitigating the risks posed by the flushing system to its use, and do not reduce drill bit wear. Therefore, it is necessary to propose a new rock drill and drilling method. Utility Model Content

[0006] In view of the shortcomings in the above-mentioned background technology, this utility model proposes a rock drill that solves the problem that the flushing system is integrated into the head of the existing technology, which can easily contaminate other structures of the rock drill after water leakage.

[0007] The technical solution of this utility model is implemented as follows: a rock drill includes a guide frame, which is slidably mounted on a base. The rock drill body and a flushing system are fixedly mounted on the guide frame. The front end of the rock drill body is provided with a head assembly, which is connected to the end of the drill rod. The flushing system is connected to the inner hole of the drill rod.

[0008] Preferably, the flushing system includes a main housing, a water jacket inside the main housing, a pressure plate on the main housing that cooperates with the water jacket, a central hole on the main housing, the water jacket, and the pressure plate, and a drill rod that rotates through the central hole; a water inlet cavity is provided on the central hole of the water jacket, and a water inlet that cooperates with the water inlet cavity is provided on the drill rod.

[0009] Preferably, the main housing is provided with a water inlet pipe, which is connected to the water inlet chamber. The water jacket is provided with a water jacket sealing ring that mates with the drill rod.

[0010] Preferably, the main housing has side plates at both ends, and the side plates are bolted to the main housing. The bottom of the main housing has a fixed bracket, which is connected to the guide frame.

[0011] Preferably, the drill rod includes a drill tail that cooperates with the head assembly. The drill tail is detachably connected to the water inlet drill rod. The water inlet drill rod is detachably connected to the drill rod. The drill rod end is provided with a drill bit. The water inlet is opened on the water inlet drill rod, and a water passage inner hole is opened at the axis of the water inlet drill rod to connect the water inlet and the inner hole of the drill rod.

[0012] Preferably, the drill rod is rotatably engaged with a guide block fixed on the base. The drill shank and the water inlet drill rod, as well as the water inlet drill rod and the drill rod, are both threadedly connected.

[0013] Preferably, the guide frame includes a base frame for fixing the rock drill body and the flushing system, and the bottom of the base frame engages with a slide rail provided on the base via a slider.

[0014] The beneficial effects of this invention are as follows: By setting a guide frame, a supporting foundation that allows for sliding during construction is provided. By separately mounting the rock drill body and the flushing system on the guide frame, and designing the flushing system and the drill head assembly as separate components, water leakage will not affect the operation of the rock drill body, reducing the risk of seal damage. Simultaneously, the separate design of the flushing system and the drill head assembly also reduces the overall weight and size of the rock drill body, facilitating assembly and movement. Through the flushing system's cooperation with the middle of the drill rod, water can be supplied to the drill rod, achieving the purpose of flushing and pre-splitting rock, thus improving drilling efficiency. This device has a reliable structure, reduces drill bit consumption and damage risks, and improves drilling efficiency. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the flushing system of this utility model;

[0018] Figure 3 This is a side view of the flushing system of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the rock drill body of this utility model;

[0020] In the diagram: 1: Guide frame, 2: Rock drill body, 3: Flushing system, 4: Head assembly, 5: Drill rod, 31: Main housing, 32: Water jacket, 33: Pressure plate, 34: Water inlet chamber, 35: Water inlet, 36: Water inlet pipe, 37: Water jacket sealing ring, 38: Side plate, 39: Fixed bracket, 51: Drill tail, 52: Water inlet drill rod, 53: Drill rod, 54: Drill bit, 55: Water passage inner hole, 56: Guide block, 21: Gearbox assembly, 22: Intermediate body assembly, 23: Cylinder assembly, 24: Tail shell assembly, 25: Motor, 26: Impact device, 27: Drive shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 , 2As shown in Embodiment 1, a rock drill includes a guide frame 1, which is slidably mounted on a base. The guide frame provides a supporting foundation for sliding during construction. A rock drill body 2 and a flushing system 3 are fixedly mounted on the guide frame 1. A drill head assembly 4 is located at the front end of the rock drill body 2, and the drill head assembly 4 is connected to the end of a drill rod 5. The flushing system 3 communicates with the inner hole of the drill rod 5, thereby allowing water to be injected into the inner hole of the drill rod. In this embodiment, the flushing system and the drill head assembly of the rock drill body are designed separately, so that leakage will not affect the use of the rock drill body, reducing the risk of seal damage.

[0023] In this embodiment, while ensuring the rock drill has all its functions, the flushing system 3 and the head assembly 4 are designed as separate units. The external placement of the flushing system 3 also reduces the size and weight of the rock drill body 2 and the head assembly 4, facilitating assembly and movement. During long-term use, if the flushing system 3's seal is damaged, there is no risk of damage to other components, extending the rock drill's service life. Furthermore, it eliminates the need to clean the rock drill body from leaks, improving the efficiency of repair and replacement after seal damage, and enhancing structural reliability.

[0024] During use, the drill head assembly clamps the tail of the drill rod 5, the rock drill body drives and impacts the drill rod, and the flushing system supplies water to the inner hole of the drill rod to achieve the purpose of flushing the drill rod and pre-splitting the rock, reducing the consumption and damage risk of the drill bit and improving the drilling efficiency.

[0025] Example 2, a rock drill, such as Figure 2 , 3 As shown, based on Embodiment 1, the flushing system 3 includes a main housing 31, a water jacket 32 ​​inside the main housing 31, and a pressure plate 33 on the main housing 31 that cooperates with the water jacket 32. The main housing 31, water jacket 32, and pressure plate 33 are provided with a central hole, and the drill rod 5 is rotatably inserted through the central hole. In this embodiment, the main housing 31 has a cavity inside to accommodate the water jacket 32. One end of the cavity is open to facilitate the insertion and installation of the water jacket. A pressure plate is provided at the open end to limit the axial position of the water jacket. Side plates 38 are provided at both ends of the main housing 31. The side plates 38 are bolted to the main housing 31 to fix the water jacket 32, side plates 38, and pressure plate 33. At the same time, the side plates 38 are also provided with through holes for inserting the drill rod 5.

[0026] In this embodiment, a water inlet cavity 34 is provided in the central hole of the water jacket 32, and a water inlet 35 that mates with the water inlet cavity 34 is provided on the drill rod 5. In this embodiment, the water inlet cavity is an annular cavity, and the water inlet can always communicate with the water inlet cavity during the rotation of the drill rod. In addition, a water inlet pipe 36 is provided on the main housing 31, which passes through the water jacket 32 ​​and is connected to the water inlet cavity 34. In actual use, the water inlet pipe can be connected to a high-pressure water supply terminal on site, such as a high-pressure water pump or a high-pressure water pipeline, so that high-pressure water can be introduced into the water inlet of the drill rod.

[0027] As a further specific embodiment, the water jacket 32 ​​is provided with a water jacket sealing ring 37 that mates with the drill rod 5. In this embodiment, a total of three pairs of water jacket sealing rings are designed. The three pairs of water jacket sealing rings seal the gaps on both sides of the water inlet chamber, forming a sealed environment to prevent water leakage during drill rod drilling. Similarly, a conventional sealing ring is also provided between the side plate and the drill rod to further prevent the risk of water leakage.

[0028] In addition, a fixing bracket 39 is provided at the bottom of the main housing 31, and is connected to the guide frame 1 through the fixing bracket 39 to fix the main housing. At the same time, reinforcing ribs are provided on the fixing bracket to enhance the structural strength.

[0029] Example 3: A rock drill, based on Example 2, includes a drill bit 5 with a shank 51 that mates with the drill head assembly 4. The shank 51 is detachably connected to the water inlet drill bit 52, and the water inlet drill bit 52 is detachably connected to the drill rod 53. Specifically, in this example, for ease of disassembly and connection, threaded connections are made between the shank 51 and the water inlet drill bit 52, and between the water inlet drill bit 52 and the drill rod 53. The drill rod 53 has a drill bit 54 at its end, a water inlet 35 is provided on the water inlet drill bit 52, and a water passage inner hole 55 is provided at the axis of the water inlet drill bit 52, connecting the water inlet 35 and the inner hole of the drill rod 53. In this embodiment, when the rock drill is working, high-pressure water enters the water channel inside the water inlet rod 52 through the water inlet 35, then flows into the inner hole of the drill rod 53, and is discharged from the water hole on the drill bit 54 through the inner hole of the drill rod 53. The high-pressure water acts on the rock to achieve pre-splitting and rock breaking, which is more conducive to the drill bit to rock drilling, improves the working efficiency of the rock drill, and reduces the consumption of the drill bit.

[0030] As a further specific embodiment, a guide block is fixedly provided on the base, and the drill rod 53 is rotatably engaged with the guide block 56 fixedly provided on the base. In this embodiment, the guide block is fixedly provided on the base, and the guide block is provided with a through hole for the drill rod to pass through. The drill rod is rotatably positioned at the through hole, thereby using the support seat to support the drill rod and improve the stability of the drill rod during rock drilling. Furthermore, the guide block is a bearing seat, and the inner ring of the bearing seat engages with the drill rod. At the same time, the drill rod can also slide relative to the inner ring of the bearing to achieve support for the drill rod.

[0031] In this embodiment, the water inlet drill rod 52 can be made of conventional high-strength and wear-resistant materials such as high-strength steel to reduce the frequency of wear and replacement. The drill rod is made of conventional drill rod, which increases the wear resistance and reduces the equipment operating cost.

[0032] Example 4: A rock drill, based on Example 3, as an optional specific implementation, the guide frame 1 includes a base frame for fixing the rock drill body 2 and the flushing system 3. The bottom of the base frame engages with a slide rail mounted on a base via a slider. In this embodiment, the base can be the ground or a trolley, providing a fixed point for the slide rail. The sliding direction of the slider on the slide rail is perpendicular to the axis of the drill rod. During drilling, the rock drill body impacts the drill bit and drives it to rotate. The drill bit transmits the motion to the water-intake drill rod, which then transmits the motion to the drill rod, ultimately acting on the rock mass through the drill bit to achieve rock drilling. Utilizing the sliding base frame, during drilling, the rock drill body and the flushing system can be moved forward synchronously using manual labor or conventional telescopic pushing devices such as hydraulic cylinders, satisfying drilling depth requirements.

[0033] As a further specific implementation method, such as Figure 4 As shown in this embodiment, the head assembly 4 is the frontmost housing of the rock drill, used to install the drill bit and provide guidance. The rock drill body 2 also includes a gearbox assembly 21, an intermediate body assembly 22, a cylinder assembly 23, a tail shell assembly 24, a motor 25, an impact device 26, and a drive shaft 27. The gearbox assembly 21 is connected to the head assembly and the intermediate body assembly 22, and transmits the rotational motion of the motor 25 through the gearbox assembly 21. The intermediate body assembly 22 is located between the gearbox assembly 21 and the cylinder assembly 23, and completes the return buffer of the impact device 26. The cylinder assembly 23 is located between the intermediate body assembly 22 and the tail shell assembly 24, and completes the impact reversal of the impact device 26. The tail shell assembly 24 is the tail shell of the rock drill. The motor 25 is mounted on the cylinder assembly 23 and provides rotational force to the drill bit 51. The impact device 26 increases the impact force through hydraulic transmission. The drive shaft 27 transmits the rotational motion of the motor 25 to the gearbox assembly 21, and then transmits the rotational motion to the drill bit 51 through the gearbox assembly 21. In this embodiment, the rotational motion of the motor is transmitted to the gears via the drive shaft and then to the drill bit. The impact piston reciprocates via hydraulic transmission, driving the drill bit to perform an impact motion. The flushing system is designed independently of the rock drill structure and is fixed to the guide frame together with the rock drill body. This reduces the overall size and weight of the rock drill body, and whether the flushing system leaks or not no longer affects the use of the rock drill. Simultaneously, holes are drilled on the drill rod, corresponding to the flushing system, which can provide high-pressure water that enters the drill rod and is then sprayed out from the water holes on the drill bit.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rock drill, characterized in that: Includes a guide frame (1), which is slidably mounted on the base. The guide frame (1) is fixedly mounted with a rock drill body (2) and a flushing system (3). The rock drill body (2) has a head assembly (4) at the front end. The head assembly (4) is connected to the end of the drill rod (5). The flushing system (3) is connected to the inner hole of the drill rod (5).

2. The rock drill according to claim 1, characterized in that: The flushing system (3) includes a main housing (31), a water jacket (32) is provided inside the main housing (31), a pressure plate (33) that cooperates with the water jacket (32) is provided on the main housing (31), a central hole is provided on the main housing (31), the water jacket (32) and the pressure plate (33), and the drill rod (5) is rotated through the central hole; a water inlet cavity (34) is provided on the central hole of the water jacket (32), and a water inlet (35) that cooperates with the water inlet cavity (34) is provided on the drill rod (5).

3. The rock drill according to claim 2, characterized in that: The main housing (31) is provided with a water inlet pipe (36), which is connected to the water inlet cavity (34).

4. The rock drill according to claim 3, characterized in that: The water jacket (32) is provided with a water jacket sealing ring (37) that cooperates with the drill rod (5).

5. The rock drill according to claim 4, characterized in that: The main housing (31) has side plates (38) at both ends, and the side plates (38) are bolted to the main housing (31).

6. The rock drill according to claim 5, characterized in that: The bottom of the main housing (31) is provided with a fixed bracket (39), and is connected to the guide frame (1) through the fixed bracket (39).

7. The rock drill according to any one of claims 2 to 6, characterized in that: The drill rod (5) includes a drill tail (51) that cooperates with the head assembly (4). The drill tail (51) is detachably connected to the water inlet drill rod (52). The water inlet drill rod (52) is detachably connected to the drill rod (53). The drill rod (53) is provided with a drill bit (54) at its end. The water inlet (35) is opened on the water inlet drill rod (52). The water inlet drill rod (52) is provided with a water passage inner hole (55) that connects the water inlet (35) and the inner hole of the drill rod (53) at its axis.

8. The rock drill according to claim 7, characterized in that: The drill rod (53) is rotatably engaged with the guide block (56) fixed on the base.

9. The rock drill according to claim 8, characterized in that: The drill bit (51) and the water inlet drill rod (52) are threaded together, as are the water inlet drill rod (52) and the drill rod (53).

10. The rock drill according to claim 1 or 9, characterized in that: The guide frame (1) includes a base frame for fixing the rock drill body (2) and the flushing system (3), and the bottom of the base frame is engaged with a slide rail provided on the base by a slider.

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