A rock drill rod with a controllable slotting head

Abstract

The application discloses a rock drilling rod with controllable slotting cutter head and relates to the technical field of tunnel and underground engineering drilling and blasting excavation, which comprises a first drill rod and a second drill rod, a slotting cutter head is sleeved on the second drill rod, the front end of the slotting cutter head is provided with a pawl structure, the pawl structure comprises a plurality of detent claws and a pawl groove arranged between the plurality of detent claws, a front blocking sleeve mechanism is arranged in front of the slotting cutter head, the front blocking sleeve mechanism is sleeved on the second drill rod, the front blocking sleeve mechanism comprises a cylindrical main body and a plurality of pawls arranged at the rear end of the cylindrical main body, and the plurality of pawls are matched with the plurality of pawl grooves. The rock drilling rod with controllable slotting cutter head adopts the above structure, when the slotting cutter head is taken out when encountering a hollow mountain wall, the slotting cutter head is easy to be clamped on the rock wall, at this time, the rotatable drill rod is rotated through the pawl mechanism to rotate the slotting cutter head, the position of the slotting part is changed, and thus the whole drill rod is withdrawn from the excavated rock wall along the original path, and the problems of large pulling load and the like are solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel and underground engineering drilling and blasting excavation technology, and in particular to a rock drilling rod with a controllable grooving cutter head. Background Technology

[0002] The main methods of tunnel excavation in my country include drill and blast method, New Austrian Tunneling Method (NATM), and shield tunneling method. Among them, drill and blast method is the most traditional construction method. It has an absolute advantage in my country's tunnel excavation market due to its advantages of economy, practicality, simplicity, and flexibility. At present, most of the highway and railway tunnels in my country are constructed using this method.

[0003] However, in years of engineering applications, the drill-and-blast method has also revealed many shortcomings, the two most significant being: firstly, the high consumption of explosives per unit and the inability to effectively control costs; and secondly, the poor controllability of the drill-and-blast method, which is prone to over-excavation and under-excavation. In particular, in actual engineering practice, problems such as cutter head and blade jamming, high load on the extraction rod, and significant equipment wear and tear are likely to occur. Summary of the Invention

[0004] The purpose of this invention is to provide a rock drilling rod with a controllable grooving cutter head, which solves the problems of cutter head and blade jamming, large rod pulling load, and large equipment wear that are prone to occur in actual engineering.

[0005] To achieve the above objectives, the present invention provides a rock drilling rod with a controllable grooving cutter head, comprising a first drill rod and a second drill rod. A grooving cutter head is sleeved on the second drill rod. The front end of the grooving cutter head is provided with a pawl structure, which includes multiple stop pawls and pawl grooves disposed between the multiple stop pawls. A front stop mechanism is provided in front of the grooving cutter head and is sleeved on the second drill rod. The front stop mechanism includes a cylindrical body and multiple pawls disposed at the rear end of the cylindrical body, wherein the multiple pawls and the multiple pawl grooves are adapted to each other.

[0006] Preferably, a spring and a locking ball are provided in the plurality of ratchet grooves, and one end of the locking ball and the spring are connected.

[0007] Preferably, the first drill rod includes a first connecting rod and a second connecting rod, wherein the cross-section of the first connecting rod is a regular hexagonal structure, the cross-section of the second connecting rod is a circular structure, and the cross-section of the second drill rod is a circular structure.

[0008] Preferably, the second drill rod and the second connecting rod are connected by a sleeve. The sleeve has a threaded end on both the left and right sides. The second drill rod has a threaded end on one end extending into the sleeve. The second connecting rod has a threaded end on the other end.

[0009] Preferably, two grooving portions are symmetrically arranged on the outer surface of the grooving head, and both grooving portions are configured as wedge-shaped structures.

[0010] Preferably, the front end of the second drill rod is configured as a tapered structure, and a drill bit is connected to the front end of the second drill rod.

[0011] Preferably, the top of the drill bit is configured as a hemispherical structure, and the top of the drill bit is provided with multiple protrusions.

[0012] Therefore, the rock drilling rod with a controllable grooving head using the above-described structure of the present invention has the following beneficial effects: (1) The traditional integrated drill rod is improved into a first drill rod and a second drill rod, which is easier to handle and move. It is connected by a sleeve, making it simple to use and durable.

[0013] (2) When encountering a hollow mountain wall, the cutting head is easy to get stuck on the rock wall when it is taken out. At this time, the drill rod can be rotated to make the cutting head rotate through the pawl mechanism, changing the position of the cutting part, so that the entire drill rod can be withdrawn from the excavated rock wall along the original path, solving the problem of large load force when pulling the rod.

[0014] (3) The end of the second drill rod where the drill bit is installed is set into a tapered structure so that the drill bit can be more firmly fitted onto the second drill rod and prevent the drill bit from coming off the second drill rod during use.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a rock drilling rod with a controllable grooving cutter head according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of an embodiment of a rock drilling rod with a controllable grooving cutter head according to the present invention; Figure 3 This is a schematic diagram of the grooving head of a rock drilling rod with a controllable grooving head according to the present invention; Figure 4 This is a schematic diagram of the front sleeve mechanism of a rock drilling rod with controllable grooving head according to the present invention; Reference numerals in the attached drawings: 1. Second chisel; 2. Grooving cutter head; 3. Stop pawl; 4. Pawl groove; 5. Cylinder body; 6. Pawl; 7. Spring; 8. Locking ball; 9. First connecting rod; 10. Second connecting rod; 11. Sleeve; 12. Thread two; 13. Thread three; 14. Grooving part; 15. Drill bit. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example Please see Figure 1-4 This invention provides a rock drilling rod with a controllable grooving cutter head, comprising a first drill rod and a second drill rod 1. A grooving cutter head 2 is sleeved on the second drill rod 1. The front end of the grooving cutter head 2 is provided with a pawl structure, which includes multiple stop pawls 3 and pawl grooves 4 disposed between the multiple stop pawls 3. A front stop mechanism is provided in front of the grooving cutter head 2, which is sleeved on the second drill rod 1. The front stop mechanism includes a cylindrical body 5 and multiple pawls 6 disposed at the rear end of the cylindrical body 5. The multiple pawls 6 and the multiple pawl grooves 4 are adapted to each other, and tooth grooves are formed between the multiple pawls 6.

[0020] Multiple pawl grooves 4 are equipped with springs 7 and locking balls 8, with one end of the locking ball 8 connected to one end of the spring 7. When the pawl 6 is engaged in the pawl groove 4, the springs 7 and locking balls 8 act as a buffer and lock for the pawl 6, preventing the pawl 6 from disengaging again.

[0021] The first drill rod includes a first connecting rod 9 and a second connecting rod 10. The first connecting rod 9 has a regular hexagonal cross-section, which makes it less likely for the drill rod to come out of the machine and ensures a tighter connection. The second connecting rod 10 has a circular cross-section, and the second drill rod 1 also has a circular cross-section. The second drill rod 1 and the second connecting rod 10 are connected by a sleeve 11. Both the left and right ends of the sleeve 11 are provided with thread 1. The end of the second drill rod 1 extending into the sleeve 11 is provided with thread 2 12. The second connecting rod 10 is provided with thread 3 13. Thread 3 13 and thread 2 12 are respectively adapted to the thread 1 at the left and right ends of the sleeve 11.

[0022] Two grooving sections 14 are symmetrically arranged on the outer surface of the grooving head 2, and both grooving sections 14 are designed as wedge-shaped structures. The grooving sections 14 are used to cut and shape grooves on the rock mass.

[0023] The front end of the second drill rod 1 is designed with a tapered structure, and a drill bit 15 is connected to the front end of the second drill rod 1. The top of the drill bit 15 is designed with a hemispherical structure, and multiple protrusions are provided on the top of the drill bit 15. The tapered structure allows the drill bit 15 to be more tightly connected to the second drill rod 1, making it less likely to come loose.

[0024] In practical use, during drilling, the grooving head 2 is in a rock-breaking state, and the pawl structure and pawl 6 do not come into contact, meaning the grooving head 2 is in normal working condition. After drilling is completed, the drill rod needs to be removed from the rock mass. At this time, the grooving head 2 comes into contact with the front retainer. The spring 7 forces the stop pawl 3 to remain in contact with the rear end of the front retainer. When the drill rod swings counterclockwise, the drive stop pawl 3 inserts into the tooth groove, pushing the front retainer to rotate through an angle. At this point, the stop pawl 3 slides on the rear end of the front retainer. When the drill rod swings clockwise, the stop pawl 3 prevents the front retainer from rotating clockwise, while the drive stop pawl 3 can slide across the tooth groove, thus keeping the front retainer stationary. This allows the angle of the grooving head to be controlled by rotating the drill rod.

[0025] Therefore, this invention provides a rock drilling rod with a controllable grooving cutter head using the above-mentioned structure. It improves the traditional integrated drill rod into a first and second drill rod, making it easier to handle and move. Connected by a sleeve, it is simple to use and durable. When encountering hollow mountain walls, the grooving cutter head is prone to getting stuck in the rock wall during removal. In this case, the rotatable drill rod, through a ratchet mechanism, rotates the grooving cutter head, changing the position of the grooving section, thus allowing the entire drill rod to exit the excavated rock wall along its original path, solving problems such as high pull-out load. The end of the second drill rod where the drill bit is mounted is designed as a conical structure, allowing the drill bit to be more securely mounted on the second drill rod, preventing the drill bit from detaching from the second drill rod during use.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A rock drilling rod with a controllable grooving cutter head, characterized in that: The device includes a first drill rod and a second drill rod. A grooving cutter head is sleeved on the second drill rod. The front end of the grooving cutter head is provided with a pawl structure. The pawl structure includes multiple stop pawls and pawl grooves disposed between the multiple stop pawls. A front stop mechanism is provided in front of the grooving cutter head. The front stop mechanism is sleeved on the second drill rod. The front stop mechanism includes a cylindrical body and multiple pawls disposed at the rear end of the cylindrical body. The multiple pawls and the multiple pawl grooves are adapted to each other. Each of the ratchet grooves is provided with a spring and a locking ball, and one end of the locking ball is connected to one end of the spring; The first drill rod includes a first connecting rod and a second connecting rod. The cross-section of the first connecting rod is a regular hexagonal structure, the cross-section of the second connecting rod is a circular structure, and the cross-section of the second drill rod is a circular structure. Two grooves are symmetrically arranged on the outer surface of the grooving head, and both grooves are designed as wedge-shaped structures.

2. The rock drilling rod with a controllable grooving cutter head according to claim 1, characterized in that: The second drill rod and the second connecting rod are connected by a sleeve. Both the left and right ends of the sleeve are provided with thread one. The end of the second drill rod extending into the sleeve is provided with thread two. The second connecting rod is provided with thread three.

3. A rock drilling rod with a controllable grooving cutter head according to claim 2, characterized in that: The front end of the second drill rod is configured as a tapered structure, and a drill bit is connected to the front end of the second drill rod.

4. A rock drilling rod with a controllable grooving cutter head according to claim 3, characterized in that: The top of the drill bit is configured as a hemispherical structure, and the top of the drill bit is provided with multiple protrusions.

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