Drill bit of novel horizontal directional drilling machine for complex stratum

Abstract

The utility model relates to the technical field of drill bits of horizontal directional drilling machines, in particular to a novel drill bit of a horizontal directional drilling machine for complex stratums, which comprises a drill body and a locking mechanism, a rotating seat is inserted on the surface of the drill body, a mounting hole is arranged at one end of the rotating seat, an annular groove communicated with the mounting hole is arranged inside the rotating seat, and the locking mechanism is connected with the rotating seat. The surface of the rotating seat is rotationally connected with a cone; the gap between the bolt and the mounting hole is flexibly filled with the rubber protective sleeve, so that mud and other impurities can be prevented from entering the mounting hole, the probability that the mounting hole and the bolt are blocked by the mud is reduced, meanwhile, the design of the U-shaped clamping block is adopted, and the U-shaped clamping block is matched with the annular groove, so that the situation that an existing bolt is prone to loosening when a drill bit runs can be prevented; and meanwhile, the U-shaped clamping block can support the rubber protective sleeve, so that the rubber protective sleeve is firmer, and the blocking effect of the rubber protective sleeve on mud is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to horizontal directional drilling machine drill bit technical field, and especially in new type horizontal directional drilling machine's drill bit of complex stratum. BACKGROUND

[0002] Horizontal directional drilling machine is a kind of construction machinery under the condition of not excavating surface, lays various underground public facilities (such as pipeline, cable etc.).At present, roller cone bit is the drill tool that horizontal directional drilling machine is commonly used in complex stratum.

[0003] At present, Chinese patent discloses a three roller cone bit (grant announcement number CN221896519U), the scheme needs to be disassembled with the arm of drill bit group, the circular arm in the installation T-shaped slot is lifted, then drives two inclined rods transmission, drives two trapezoidal blocks to move away, removes the restriction to the clamping groove, then can remove the connection of clamping groove and drill bit group.

[0004] Since T-shaped slot is exposed on the surface of drill bit, and the operation environment of drill bit exists mud, mud is very easy to enter T-shaped slot, which not only fills the gap between T-shaped slot and circular arm, and when mud is dehydrated and solidified, solidified mud will be bonded and locked in T-shaped slot, increase the difficulty of user replacing roller.

[0005] Therefore, a new type horizontal directional drilling machine's drill bit of complex stratum is proposed to solve the above problems. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a new type horizontal directional drilling machine's drill bit of complex stratum to solve the above problems, and improving the problem that the existing roller cone bit for new type horizontal directional drilling machine of complex stratum with roller replacement function has poor self-protection performance and increases the difficulty of roller replacement.

[0007] The utility model realizes the above-mentioned purpose by the following technical scheme, a new type horizontal directional drilling machine's drill bit of complex stratum, including: drill body and locking mechanism, the surface of drill body is inserted with rotating seat, one end of rotating seat is provided with mounting hole, the inside of rotating seat is provided with annular groove that communicates with mounting hole, the surface of rotating seat is rotatably connected with roller.

[0008] Preferably, the locking mechanism includes a bolt inserted into the inside of the mounting hole, the rod portion end of the bolt penetrates the mounting hole and is threadedly connected with the drill body, the head portion of the bolt is provided with a mounting cavity, the inside of the mounting cavity is slidably connected with a U-shaped clamping block, one end of the U-shaped clamping block is clamped with the annular groove, the head portion of the bolt is provided with a rubber protective sleeve in contact with the mounting hole, the other end of the U-shaped clamping block is arranged on the inside of the rubber protective sleeve.

[0009] Preferably, one vertical inner wall of the mounting cavity is fixedly connected with a spring, one end of the spring is fixedly connected with a guide block in contact with a U-shaped clamping block, the contact surfaces of the U-shaped clamping block and the guide block are both matched inclined surfaces, and the inclined surface of the U-shaped clamping block faces the spring.

[0010] Preferably, one vertical inner wall of the mounting cavity is fixedly connected with a guide rod, one end of the guide rod penetrates the spring and the guide block in sequence and is fixedly connected with another vertical inner wall of the mounting cavity.

[0011] Preferably, one end of the guide block is provided with a reserved slot, and one end of the spring is fixedly connected with a vertical inner wall of the reserved slot.

[0012] Preferably, the other end of the U-shaped clamping block is provided with a slope, the slope faces away from the annular groove, and the cross-sectional dimension of the slope is greater than the cross-sectional dimension of the U-shaped clamping block arranged outside the mounting cavity.

[0013] Preferably, the number of the U-shaped clamping blocks is not less than three, and the U-shaped clamping blocks are distributed in a ring around the axis of the guide block.

[0014] Preferably, the cross-sectional length of the U-shaped clamping block arranged inside the annular groove is less than the cross-sectional length of the U-shaped clamping block arranged outside the bolt.

[0015] The utility model discloses a beneficial effect is:

[0016] 1. The gap between the bolt and the mounting hole is filled with the rubber protective sleeve, which can prevent impurities such as mud from entering the mounting hole, thereby reducing the probability of the mounting hole being blocked by mud, and the U-shaped clamping block and the annular groove can prevent the existing bolt from loosening during the operation of the drill bit, and the U-shaped clamping block can also support the rubber protective sleeve, making the rubber protective sleeve more rigid and improving the blocking effect of the rubber protective sleeve on mud.

[0017] 2. The spring and the guide block can quickly reset the U-shaped clamping block when the U-shaped clamping block loses the blockage, without the need for manual adjustment by the user, and during the rotation of the drill bit, the guide block extrudes the U-shaped clamping block outward under the action of centrifugal force, which can make the connection between the U-shaped clamping block and the annular groove more tight, improve the rigidity of the rubber protective sleeve, and further improve the blocking effect of the rubber protective sleeve on mud. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a structure schematic view of the whole structure;

[0019] Figure 2 The utility model discloses a structure schematic view of the whole structure;

[0020] Figure 3 for Figure 2 Schematic sectional view along the middle AA direction;

[0021] Figure 4 for Figure 2 Cross-sectional view along the middle BB direction;

[0022] Figure 5 for Figure 4 Enlarged view of C;

[0023] Figure 6 This is an exploded view of the locking mechanism in this utility model.

[0024] In the diagram: 100, drill body; 200, rotating seat; 210, mounting hole; 220, annular groove; 300, roller cone; 400, locking mechanism; 410, bolt; 411, mounting cavity; 420, U-shaped locking block; 421, ramp; 430, rubber protective sleeve; 440, spring; 450, guide block; 451, reserved groove; 460, guide rod. Detailed Implementation

[0025] 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.

[0026] In practical implementation: such as Figures 1-6 As shown, a drill bit for a novel horizontal directional drilling rig in complex formations includes: a drill body 100 and a locking mechanism 400. A rotating seat 200 is inserted into the surface of the drill body 100. One end of the rotating seat 200 is provided with a mounting hole 210. An annular groove 220 communicating with the mounting hole 210 is provided inside the rotating seat 200. A toothed wheel 300 is rotatably connected to the surface of the rotating seat 200.

[0027] The surface of the drill body 100 is provided with annular mounting grooves that match the rotating seat 200. The inside of the drill body 100 is provided with threaded grooves that communicate with the drill body 100. The lower surface of the drill body 100 is provided with external threads. The bottom of the drill body 100 is provided with liquid guiding cavities that are staggered with the mounting grooves. A nozzle facing the roller cone 300 is embedded in the liquid guiding cavity.

[0028] When the drill bit needs to be installed on a horizontal directional drilling rig, the installer only needs to connect the end of the horizontal directional drilling rig's output shaft to the external thread on the lower surface of the drill body 100, and then firmly tighten the end of the horizontal directional drilling rig's output shaft to the drill body 100. At this time, the horizontal directional drilling rig can drive the drill bit to drill into the bottom layer. During the operation of the drill bit, the roller cones 300 alternately contact the formation drilling surface, generating impact, crushing and shearing effects to break the formation rocks. This working method enables the drill bit to cope with formations of different hardness.

[0029] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the locking mechanism 400 includes a bolt 410 inserted into the mounting hole 210. The shank end of the bolt 410 passes through the mounting hole 210 and is threadedly connected to the drill body 100. The head of the bolt 410 has a mounting cavity 411. A U-shaped locking block 420 is slidably connected inside the mounting cavity 411. One end of the U-shaped locking block 420 is engaged with the annular groove 220. The head of the bolt 410 is fitted with a rubber protective sleeve 430 that contacts the mounting hole 210. The other end of the U-shaped locking block 420 is located inside the rubber protective sleeve 430. The end of the rubber protective sleeve 430 facing the drill body 100 is installed on the surface of the bolt 410 facing away from the drill body 100 by heat fusion connection.

[0030] The other end of the U-shaped locking block 420 has a ramp 421, which faces away from the annular groove 220. The cross-sectional dimension of the ramp 421 is larger than the cross-sectional dimension of the U-shaped locking block 420 located outside the mounting cavity 411. This allows the socket wrench to automatically squeeze and displace the U-shaped locking block 420 while the socket covers the head of the bolt 410, eliminating the need for separate adjustment by the user and reducing the user's adjustment burden. There are at least three U-shaped locking blocks 420, which are arranged in a ring around the axis of the guide block 450. This increases the positioning strength of the bolt 410 and further reduces the probability of the bolt 410 loosening. The cross-sectional length of the U-shaped locking block 420 located inside the annular groove 220 is smaller than the cross-sectional length of the U-shaped locking block 420 located outside the bolt 410. This ensures that the socket wrench can adjust one end of the U-shaped locking block 420 into the mounting cavity 411 via the ramp 421.

[0031] When the user needs to replace the gear 300, the user inserts a socket wrench that matches the head of the bolt 410 onto the head of the bolt 410. During this process, the rubber protective sleeve 430 is compressed by the socket wrench. As the rubber protective sleeve 430 is compressed, it indirectly presses against the ramp 421 on the U-shaped retainer 420, causing the U-shaped retainer 420 to slide into the mounting cavity 411 and gradually pull away from the annular groove 220. When the U-shaped retainer 420 is completely separated from the annular groove 220, the bolt 410 is no longer obstructed, and the user can quickly unscrew the bolt 410 using the socket wrench. Then, the user can remove the rotating seat 200 along with the gear 300 from the mounting groove. Next, install the new rotating seat 200 along with the new toothed wheel 300 into the mounting groove. Then, the bolt 410, which holds the U-shaped locking block 420 in place, passes through the mounting hole 210 and aligns with the thread groove. Then, manually rotate the socket wrench in the corresponding direction. The socket wrench drives the bolt 410 to spiral into the thread groove. When the bolt 410 is installed in place, one end of the U-shaped locking block 420 is just aligned with the annular groove 220. At this time, the user removes the socket wrench, and the U-shaped locking block 420 loses its obstruction. The spring 440 quickly resets the U-shaped locking block 420 through the guide block 450, so that the U-shaped locking block 420 quickly locks into the annular groove 220, thereby preventing the bolt 410 from loosening.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a spring 440 is fixedly connected to one of the vertical inner walls of the mounting cavity 411. One end of the spring 440 is fixedly connected to a guide block 450 that contacts the U-shaped locking block 420. The contact surfaces of the U-shaped locking block 420 and the guide block 450 are both inclined surfaces that fit together, with the inclined surface of the U-shaped locking block 420 facing the spring 440. A guide rod 460 is fixedly connected to one of the vertical inner walls of the mounting cavity 411. One end of the guide rod 460 passes through the spring 440 and the guide block 450 in sequence and is fixedly connected to the other vertical inner wall of the mounting cavity 411. A reserved groove 451 is provided at one end of the guide block 450, and one end of the spring 440 is fixedly connected to the vertical inner wall of the reserved groove 451.

[0033] In use, this invention flexibly fills the gap between the bolt 410 and the mounting hole 210 by the rubber protective sleeve 430. This not only prevents impurities such as mud from entering the mounting hole 210, reducing the probability of mud clogging the mounting hole 210 and the bolt 410, but also, during the rotation of the drill bit, the guide block 450, under the action of centrifugal force, pushes the U-shaped locking block 420 outward from the mounting cavity 411. This not only makes the connection between the U-shaped locking block 420 and the annular groove 220 tighter, preventing the bolt 410 from easily loosening during drill bit operation, but also allows the U-shaped locking block 420 to support the rubber protective sleeve 430, making the rubber protective sleeve 430 more robust, thereby improving the mud-blocking effect of the rubber protective sleeve 430.

[0034] It should be noted that the roller cone 300, bolt 410, nozzle, socket wrench and horizontal directional drilling rig mentioned above are all components with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the horizontal directional drilling rig can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drill bit for a novel horizontal directional drilling rig in complex formations, characterized in that, include: A drill body (100) has a rotating seat (200) inserted into its surface. One end of the rotating seat (200) has a mounting hole (210). The interior of the rotating seat (200) has an annular groove (220) communicating with the mounting hole (210). A toothed wheel (300) is rotatably connected to the surface of the rotating seat (200). The locking mechanism (400) includes a bolt (410) inserted into the mounting hole (210). The shank end of the bolt (410) passes through the mounting hole (210) and is threadedly connected to the drill body (100). The head of the bolt (410) has a mounting cavity (411). A U-shaped locking block (420) is slidably connected inside the mounting cavity (411). One end of the U-shaped locking block (420) is engaged with the annular groove (220). The head of the bolt (410) is fitted with a rubber protective sleeve (430) that contacts the mounting hole (210). The other end of the U-shaped locking block (420) is located inside the rubber protective sleeve (430).

2. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 1, characterized in that: A spring (440) is fixedly connected to one of the vertical inner walls of the mounting cavity (411). One end of the spring (440) is fixedly connected to a guide block (450) that contacts the U-shaped locking block (420). The contact surfaces of the U-shaped locking block (420) and the guide block (450) are both inclined surfaces that fit together. The inclined surface of the U-shaped locking block (420) faces the spring (440).

3. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 2, characterized in that: A guide rod (460) is fixedly connected to one of the vertical inner walls of the mounting cavity (411). One end of the guide rod (460) passes through the spring (440) and the guide block (450) in sequence and is fixedly connected to the other vertical inner wall of the mounting cavity (411).

4. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 2, characterized in that: One end of the guide block (450) is provided with a reserved groove (451), and one end of the spring (440) is fixedly connected to the vertical inner wall of the reserved groove (451).

5. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 1, characterized in that: The other end of the U-shaped card block (420) is provided with a ramp (421), the ramp (421) is opposite to the annular groove (220), and the cross-sectional dimension of the ramp (421) is larger than the cross-sectional dimension of the U-shaped card block (420) located outside the mounting cavity (411).

6. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 5, characterized in that: The number of the U-shaped card blocks (420) is not less than three, and the U-shaped card blocks (420) are distributed in a ring around the axis of the guide block (450).

7. The drill bit of a novel horizontal directional drilling rig for complex formations according to claim 6, characterized in that: The cross-sectional length of the U-shaped block (420) inside the annular groove (220) is less than the cross-sectional length of the U-shaped block (420) outside the bolt (410).

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