Adjustable pneumatic rock drilling auxiliary device for tunnel construction

Abstract

The utility model discloses an adjustable pneumatic rock drilling auxiliary device for tunnel construction, and relates to the technical field of civil engineering and traffic construction. Comprising a lower supporting rod, a horizontal dial is arranged on the top face of the lower supporting rod, an upper supporting rod is arranged in the horizontal dial, one end of the upper supporting rod extends into the lower supporting rod and is in sliding connection with the lower supporting rod, and an adjusting assembly is arranged at the other end of the upper supporting rod; the adjusting assembly comprises a top fixing table, a buffering part is arranged at the end, extending into the upper supporting rod, of the top fixing table, and a rotating part used for adjusting the pitching angle of the drill rod is arranged at the end, extending out of the upper supporting rod, of the top fixing table. The rotating angle of the drill rod in the horizontal direction can be adjusted through the horizontal dial, the pitching angle of the drill rod can be adjusted through the rotating part, vibration can be effectively reduced through the buffering part, accurate angle adjustment can be effectively conducted on the drill rod, manual operation errors are effectively reduced, and high-precision construction is achieved.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering and transportation construction technology, and in particular to an adjustable pneumatic rock drilling auxiliary device for tunnel construction. Background Technology

[0002] Rock drilling is a crucial step in tunnel construction. When facing hard rock formations, large machinery is typically used for drilling to facilitate subsequent blasting or support work. However, in some confined tunnel environments, space constraints make it difficult to deploy large drilling equipment. Therefore, in practice, manual handheld pneumatic rock drills are often necessary. Commonly used handheld rock drills, such as the YT28 pneumatic rock drill, weigh approximately 26 kg. While simple to operate, manual drilling still presents numerous problems and challenges.

[0003] Currently, manual hand-held pneumatic rock drilling in tunnel construction faces the following main problems:

[0004] 1. Low positioning accuracy of manual drilling: In traditional operations, workers usually hold the drill rod by hand for initial positioning or directly lift the rock drill to start drilling. Due to the heavy weight of the pneumatic rock drill and the high hardness of the rock strata, it is difficult to maintain the stability of the equipment during operation, resulting in low drilling accuracy and affecting the quality of subsequent construction.

[0005] 2. The manual hand-held drill rod method is highly dangerous: In traditional manual rock drilling methods, one worker typically operates the pneumatic rock drill while another worker holds the drill rod for positioning. This collaborative method presents significant safety hazards, as the risk of rock fragments being stirred up during drilling remains. Furthermore, vibrations are transmitted from the drill rod to the worker's body, causing damage to the joints of the arms and wrists and increasing fatigue during prolonged operation.

[0006] 3. Existing auxiliary devices lack flexibility: There are some pneumatic drill brackets on the market that can reduce the intensity of manual operation to a certain extent, but they are subject to installation limitations in confined spaces and it is difficult to flexibly select drilling points and accurately set drilling parameters, resulting in insufficient drilling accuracy.

[0007] 4. Some improved drilling auxiliary devices require the use of guide rails or modified stands for installation, making them difficult to apply to drilling situations outside the tunnel face. In addition, some devices can only adjust the angle simply and do not take into account the friction when the drill rod contacts the device (increasing tool wear and the probability of damage, and the vibration and collision caused by rigid connection will bring huge noise, which will have a great impact on the hearing and mood of workers in the confined space of the tunnel).

[0008] While existing auxiliary devices can play a certain role, they still suffer from problems such as insufficient control precision, complex installation, and low versatility. Furthermore, they lack consideration for buffer mechanisms and wear-reducing designs, and have not fully resolved the precision and safety issues inherent in manual hand-held rock drilling. Therefore, it is necessary to improve and design an auxiliary device that can effectively enhance drilling accuracy, facilitate installation, and improve the worker's operating experience to meet the needs of hand-held pneumatic rock drilling operations during tunnel construction.

[0009] Based on the problems and defects in the existing technology, this utility model proposes an adjustable pneumatic rock drilling auxiliary device for tunnel construction. It can not only effectively achieve flexible erection, flexible adjustment of height and angle, and provide basic functions such as positioning and support of drill rod to reduce manual handling, but also effectively reduce wear and maintenance frequency, reduce vibration and noise, thereby better improving the human-machine interaction experience, reducing the health risks faced by personnel, and ultimately improving construction accuracy and efficiency. Utility Model Content

[0010] The purpose of this invention is to provide an adjustable pneumatic rock drilling auxiliary device for tunnel construction, so as to solve the problems existing in the prior art.

[0011] To achieve the above objectives, this utility model provides the following solution: This utility model provides an adjustable pneumatic rock drilling auxiliary device for tunnel construction, including a lower support rod, a horizontal plate on the top surface of the lower support rod, an upper support rod inside the horizontal plate, one end of the upper support rod extending into the lower support rod and slidably connected to the lower support rod, and an adjustment component at the other end of the upper support rod; the adjustment component includes a top fixing platform, a buffer portion at one end of the top fixing platform extending into the upper support rod, and a rotating portion for adjusting the pitch angle of the drill rod at the other end of the top fixing platform extending out of the upper support rod.

[0012] Preferably, the lower support rod has an inner cavity, and a first limiting ring is fixedly connected inside the inner cavity. The first limiting ring is detachably connected to a second limiting ring, and the second limiting ring is fixedly connected to the end of the upper support rod.

[0013] Preferably, a first tightening screw is threaded onto the outer wall of the lower support rod, and one end of the first tightening screw extending into the inner cavity is detachably connected to the upper support rod.

[0014] Preferably, one end of the first tightening screw that extends into the inner cavity is positioned above the first limiting ring.

[0015] Preferably, the horizontal dial includes a dial housing, a first bearing is disposed inside the dial housing, a pointer ring is disposed inside the first bearing, and the pointer ring is sleeved on the upper support rod.

[0016] Preferably, a protrusion is fixedly connected to the inner wall of the pointer ring, and the protrusion is slidably connected to a limiting groove, which is formed on the outer wall of the upper support rod.

[0017] Preferably, the buffer includes a washer installed in the top surface of the upper support rod, a fixed base is installed on the top surface of the washer, a plurality of springs are fixedly connected to one end of the fixed base facing the washer, the plurality of springs are arranged in the washer, and the end of the fixed base away from the washer is fixedly connected to the top fixed platform.

[0018] Preferably, the rotating part includes a rotating shaft rotatably connected inside the top fixed platform, with a pitch dial fixedly connected to one end of the rotating shaft extending outside the top fixed platform, and a drill rod frame fixedly connected to the other end of the rotating shaft extending outside the top fixed platform.

[0019] Preferably, the top surface of the top fixing platform is threaded with a second tightening screw, which is detachably connected to the rotating shaft.

[0020] Preferably, the drill rod holder has a through hole, and a sleeve liner is rotatably connected inside the through hole.

[0021] The present invention discloses the following technical effects:

[0022] This invention allows for adjustment of the drill rod's horizontal rotation angle via a horizontal dial, adjustment of the drill rod's pitch angle via a rotating part, and effective reduction of vibration via a buffer part. It not only enables precise angle adjustment of the drill rod, effectively reducing human error and achieving high-precision construction, but also significantly reduces the need for workers to directly contact the drill rod, lowering the probability of worker injury. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in 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.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the lower support rod of this utility model;

[0026] Figure 3 This is a schematic diagram of the horizontal dial structure of this utility model;

[0027] Figure 4 This is a top view of the horizontal dial structure of this utility model;

[0028] Figure 5 Exploded structural diagram of the drill rod holder and sleeve liner of this utility model;

[0029] Figure 6 Schematic diagram of the buffer section and pitch circle structure of this utility model;

[0030] Figure 7 Schematic diagram of the upper support rod structure of the utility model;

[0031] The components are as follows: 1. Lower support rod; 2. First tightening screw; 3. Horizontal dial; 4. Upper support rod; 5. Top fixing platform; 6. Pitch dial; 7. Second tightening screw; 8. Drill rod holder; 11. Inner cavity; 12. First limiting ring; 31. Dial shell; 32. First bearing; 33. Pointer ring; 34. Protrusion; 35. Pointer; 41. Second limiting ring; 42. Limiting groove; 51. Washer; 52. Fixing base; 53. Spring; 54. Limiting block; 81. Through hole; 82. Second bearing; 83. Sleeve liner. Detailed Implementation

[0032] 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.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1-7 This utility model discloses an adjustable pneumatic rock drilling auxiliary device for tunnel construction, including a lower support rod 1, a horizontal plate 3 on the top surface of the lower support rod 1, an upper support rod 4 inside the horizontal plate 3, one end of the upper support rod 4 extending into the lower support rod 1 and slidably connected to the lower support rod 1, and an adjustment component at the other end of the upper support rod 4; the adjustment component includes a top fixing platform 5, a buffer part at one end of the top fixing platform 5 extending into the upper support rod 4, and a rotating part for adjusting the pitch angle of the drill rod at the other end of the top fixing platform 5 extending out of the upper support rod 4.

[0035] In order to ensure that the lower support rod 1 can provide stable support, several legs are fixedly connected at equal intervals at the bottom of the lower support rod 1. These legs enable the lower support rod 1 to provide stable support.

[0036] This invention allows for adjustment of the drill rod's horizontal rotation angle via the horizontal dial 3, adjustment of the drill rod's pitch angle via the rotating part, and effective reduction of vibration via the buffer part. It not only enables precise angle adjustment of the drill rod, effectively reducing human error and achieving high-precision construction, but also effectively reduces the need for workers to directly contact the drill rod, lowering the probability of worker injury.

[0037] In a further optimized design, an inner cavity 11 is formed within the lower support rod 1. A first limiting ring 12 is fixedly connected within the inner cavity 11, and a second limiting ring 41 is detachably connected to the first limiting ring 12. The second limiting ring 41 is fixedly connected to the end of the upper support rod 4. By limiting the distance that the second limiting ring 41 can slide up and down within the inner cavity 11 through the first limiting ring 12, the upper support rod 4 can be effectively prevented from detaching from the lower support rod 1, allowing the upper support rod 4 to slide stably up and down within the lower support rod 1.

[0038] In a further optimized design, a first tightening screw 2 is threaded onto the outer wall of the lower support rod 1. One end of the first tightening screw 2, which extends into the inner cavity 11, is detachably connected to the upper support rod 4. By tightening the first tightening screw 2, the first tightening screw 2 and the upper support rod 4 are tightly abutted, which can effectively prevent the upper support rod 4 from rotating or rising and falling.

[0039] When the first tightening screw 2 is loosened, the upper support rod 4 can rotate and rise stably.

[0040] In a further optimized design, one end of the first tightening screw 2 extending into the inner cavity 11 is positioned above the first limiting ring 12. This allows the first tightening screw 2 to effectively limit the movement of the upper support rod 4.

[0041] A further optimized design includes a horizontal dial 3 comprising a dial housing 31, within which a first bearing 32 is housed, and within the first bearing 32 a pointer ring 33 is housed, which is fitted onto the upper support rod 4. This allows the pointer ring 33 to rotate stably, achieving 360-degree horizontal rotation.

[0042] In a further optimized design, a protrusion 34 is fixedly connected to the inner wall of the pointer ring 33. The protrusion 34 is slidably connected to a limiting groove 42, which is located on the outer wall of the upper support rod 4. When the upper support rod 4 rotates, the limiting groove 42 drives the protrusion 34 to rotate synchronously, and the protrusion 34 drives the pointer ring 33 to rotate.

[0043] To facilitate control of the horizontal rotation angle, a pointer 35 is installed on the pointer ring 33, and the dial shell 31 is engraved with a scale. The horizontal rotation angle can be effectively adjusted by the scale value pointed to by the pointer 35.

[0044] The design is further optimized by including a washer 51 installed on the top surface of the upper support rod 4. A fixed base 52 is mounted on the top surface of the washer 51. Several springs are fixedly connected to the end of the fixed base 52 facing the washer 51, and the springs are disposed inside the washer 51. The end of the fixed base 52 away from the washer 51 is fixedly connected to the top fixed platform 5. During operation, the combined action of the washer 51 and the springs absorbs the vibration of the drilling rig, reduces loosening of the device due to vibration, and ensures accuracy. At the same time, it reduces the noise generated by the device due to vibration, allowing the lower support rod 1 and the upper support rod 4 to be stably supported.

[0045] The design is further optimized so that the rotating part includes a rotating shaft rotatably connected within the top fixed platform 5. A pitch dial 6 is fixedly connected to one end of the rotating shaft extending beyond the top fixed platform 5, and a drill rod holder 8 is fixedly connected to the other end of the rotating shaft extending beyond the top fixed platform 5. The rotating shaft allows the pitch dial 6 to easily adjust the rotation angle of the drill rod holder 8.

[0046] The design is further optimized by adding a second tightening screw 7 to the top surface of the top fixed platform 5, which is detachably connected to the rotating shaft.

[0047] The structure of the pitch dial 6 is the same as that of the horizontal dial 3. After the angle is adjusted, tightening the second tightening screw 7 will cause the second tightening screw 7 to abut tightly against the rotating shaft, preventing the rotating shaft from rotating. When the second tightening screw 7 is loosened, the rotating shaft can rotate.

[0048] The design is further optimized by providing a through hole 81 on the drill rod holder 8, with a sleeve liner 83 rotatably connected inside the through hole 81. Inserting the drill rod into the sleeve liner 83 allows the drill rod to operate.

[0049] In order to enable the sleeve liner 83 to rotate stably within the through hole 81, a second bearing 82 is installed at each end of the sleeve liner 83. The second bearing 82 is installed within the through hole 81, and the sleeve liner 83 can rotate stably within the through hole 81 through the second bearing 82.

[0050] The second bearing 82 and the sleeve liner 83 can rotate synchronously when the rock drill rod is working, which effectively reduces the friction between components and the wear of the tool.

[0051] Working process: Securely fix the lower support rod 1 to the ground or workbench, and adjust the height and horizontal angle of the upper support rod 4; then adjust the pitch angle of the drill rod frame 8, and tighten the first tightening screw 2 and the second tightening screw 7; then, pass the drill rod through the sleeve liner 83 to achieve the initial position adjustment of the drill bit, and apply stable support to the drill rod through the sleeve liner 83, and then you can start working.

[0052] The lower support rod 1 and the upper support rod 4 provide stable support and guidance for the drill rod, overcoming the accuracy problems caused by the weight of the equipment and instability of the handheld drill during handheld rock drilling. This also eliminates the need for additional workers to manually hold the drill rod. Simultaneously, the pitch adjustment function of the rotating part and the buffer part ensure that the rock drill always maintains the optimal working angle and reduces the impact of high-frequency vibrations on the equipment and workers. This invention is suitable for construction in the confined space of tunnels, effectively improving construction accuracy while reducing the labor intensity and safety risks for workers.

[0053] Through the combined action of the lower support rod 1, upper support rod 4, drill rod frame 8, horizontal dial 3, and pitch dial 6, workers can precisely adjust the drilling angle of the rock drill, ensuring that the borehole maintains the optimal angular relationship with the working face. This significantly improves drilling accuracy, reducing the drilling angle error to within ±2°. It directly reduces secondary processing and poor blasting results caused by drilling deviations, effectively improving construction efficiency.

[0054] The lower support rod 1, upper support rod 4, and drill rod frame 8 eliminate the need for additional manual assistance, reduce worker exposure to high-risk positions, and effectively prevent injuries caused by dangerous situations such as rock debris collapses. Furthermore, the buffer section significantly reduces the impact of vibration on workers' bodies and, to some extent, reduces noise during equipment use, minimizing fatigue and health problems during long-term operation.

[0055] The weight and continuous vibration of the rock drill put a heavy burden on the workers' bodies. By using the lower support rod 1, upper support rod 4, and drill rod frame 8, workers are freed from holding the drill rod for long periods of time, which increases the available manpower and significantly reduces the intensity of labor.

[0056] By quickly adjusting the horizontal angle, pitch angle, and height of the upper support rod 4, the time spent on tedious manual operation is reduced, enabling flexible responses to different working conditions in the tunnel. Especially in construction in confined spaces, the equipment layout is greatly improved, and the preparation time for construction is reduced.

[0057] By using lightweight alloy materials, manufacturing, maintenance, and transportation costs were reduced, as well as material waste and rework caused by construction precision issues. This effectively reduced reliance on manual labor, significantly lowering labor costs in long-term construction projects and improving overall construction economic efficiency.

[0058] In some construction environments, where the ground cannot be fixed with ground anchors, it can be fixed with walls or other structures.

[0059] This invention uses lightweight alloy materials and, in specific environments, uses carbon fiber composite materials or high-strength plastics as alternatives to further reduce the weight of the equipment and improve portability.

[0060] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An adjustable pneumatic rock drilling auxiliary device for tunnel construction, characterized in that: Includes a lower support rod (1), the top surface of the lower support rod (1) is provided with a horizontal plate (3), the horizontal plate (3) is provided with an upper support rod (4), one end of the upper support rod (4) extends into the lower support rod (1) and is slidably connected to the lower support rod (1), and the other end of the upper support rod (4) is provided with an adjustment component; The adjustment assembly includes a top fixed platform (5), one end of which extends into the upper support rod (4) is provided with a buffer part, and the other end of which extends out of the upper support rod (4) is provided with a rotating part for adjusting the pitch angle of the drill pipe.

2. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 1, characterized in that: The lower support rod (1) has an inner cavity (11) and a first limiting ring (12) is fixedly connected inside the inner cavity (11). The first limiting ring (12) is detachably connected to a second limiting ring (41), and the second limiting ring (41) is fixedly connected to the end of the upper support rod (4).

3. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 2, characterized in that: The lower support rod (1) has a first tightening screw (2) threaded on its outer wall. One end of the first tightening screw (2) that extends into the inner cavity (11) is detachably connected to the upper support rod (4).

4. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 3, characterized in that: The first tightening screw (2) has one end extending into the inner cavity (11) and is positioned above the first limiting ring (12).

5. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 1, characterized in that: The horizontal dial (3) includes a dial shell (31), a first bearing (32) is provided inside the dial shell (31), a pointer ring (33) is provided inside the first bearing (32), and the pointer ring (33) is sleeved on the upper support rod (4).

6. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 5, characterized in that: A protrusion (34) is fixedly connected to the inner wall of the pointer ring (33), and the protrusion (34) is slidably connected to a limiting groove (42), which is opened on the outer wall of the upper support rod (4).

7. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 1, characterized in that: The buffer section includes a washer (51) installed in the top surface of the upper support rod (4). A fixed base (52) is installed on the top surface of the washer (51). A plurality of springs are fixedly connected to one end of the fixed base (52) facing the washer (51). The plurality of springs are arranged inside the washer (51). The end of the fixed base (52) away from the washer (51) is fixedly connected to the top fixed platform (5).

8. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 5, characterized in that: The rotating part includes a rotating shaft rotatably connected inside the top fixed platform (5), with a pitch dial (6) fixedly connected to one end of the rotating shaft extending outside the top fixed platform (5), and a drill rod frame (8) fixedly connected to the other end of the rotating shaft extending outside the top fixed platform (5).

9. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 8, characterized in that: The top surface of the top fixing platform (5) is threaded with a second tightening screw (7), which is detachably connected to the rotating shaft.

10. The adjustable pneumatic rock drilling auxiliary device for tunnel construction according to claim 8, characterized in that: The drill rod holder (8) has a through hole (81), and a sleeve liner (83) is rotatably connected inside the through hole (81).

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