A rod end device for achieving simultaneous footage of an anchor rod and a drill rod

Abstract

This invention discloses a rod end device for achieving synchronous advancement of anchor bolts and drill rods. It includes an anchor bolt end and a drill rod located within the anchor bolt end. The anchor bolt end consists of a first connector and a second connector, which are rotatably connected. Two stops are symmetrically connected to the inner wall of the anchor bolt end's rock-entry end. Rotary arms, corresponding in number and position to the stops, are connected to the outer wall of the drill rod. When the rotary arms rotate due to obstruction by the stops, they drive the stops and the second connector of the anchor bolt end to rotate together. Each stop consists of three flat plates, with U-shaped slots formed between them for mounting the rotary arms. The advantages of this invention are: synchronous rotation of the anchor bolt end and the drill rod not only achieves synchronous positioning of the borehole and the anchor bolt, reducing obstacles to anchor bolt entry, but also avoids power loss caused by the overall rotation of the anchor bolt with the drill rod, thus improving construction efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of anchor bolt construction, and in particular to a rod end device for achieving synchronous advance of anchor bolts and drill rods. Background Technology

[0002] Rock bolts are commonly used in tunnel construction to reinforce the surrounding rock. Typically, rock bolt installation involves drilling holes at the designed locations, then inserting the rock bolts into the holes, and repeating this process alternately until the designed depth is reached. During the insertion of the rock bolts, difficulties can arise due to untimely or difficult removal of drill cuttings, obstruction by large blocks, or even hole collapse, leading to difficulties in bolt insertion. Achieving simultaneous drilling and rock bolt placement, reducing construction steps and minimizing obstacles to bolt insertion, is essential for rapid tunnel rock bolt installation. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a rod end device for achieving synchronous advancement of anchor rods and drill rods. This device achieves this by using a non-coupled, freely rotating assembly connection between the anchor rod end and the remaining anchor rods, and by connecting a stop block and a rotating arm to the anchor rod end and the drill rod respectively. This allows the anchor rod end and drill rod to rotate synchronously, not only achieving synchronous positioning of the borehole and anchor rod, reducing obstacles to anchor rod entry into the hole, but also avoiding power loss caused by the overall rotation of the anchor rod with the drill rod, thus improving construction efficiency.

[0004] The objective of this invention is achieved through the following technical solutions:

[0005] A rod end device for synchronous advancement of anchor bolts and drill rods is characterized by comprising an anchor bolt end and a drill rod located within the anchor bolt end. The anchor bolt end is composed of a first connector and a second connector, which are rotatably connected. Two stops are symmetrically connected to the inner wall of the inner cavity at the rock-entry end of the anchor bolt end. The drill rod has rotating arms connected to its outer wall, the number and position of which correspond to the number and position of the stops. When the rotating arms rotate due to the obstruction of the stops, they drive the stops and the second connector of the anchor bolt end to rotate together. Each stop is composed of three flat plates, and a U-shaped groove for mounting the rotating arms is formed between the three flat plates.

[0006] The anchor bolt end has a serrated ring around its rock-entry end, and the other end of the anchor bolt end is threaded to a regular anchor bolt to form an integral anchor bolt.

[0007] The two stops are symmetrically arranged with respect to the axial direction of the anchor rod end, and the height of the two stops is sufficient for the drill bit of the drill rod to pass freely in the space between the two stops.

[0008] The two rotating arms are symmetrically arranged with respect to the axis of the drill rod, and the rotating arms are rectangular in structure.

[0009] The advantages of this invention are: simple structure and convenient construction; by using a non-coupled free rotation assembly connection between the end of the anchor rod and the rest of the anchor rod, and by connecting a stop block and a rotating arm to the end of the anchor rod and the drill rod respectively, the end of the anchor rod and the drill rod can rotate synchronously. This not only achieves synchronous positioning of the borehole and the anchor rod, reducing obstacles to the anchor rod entering the hole, but also avoids power loss caused by the overall rotation of the anchor rod with the drill rod, thus improving construction efficiency. Attached Figure Description

[0010] Figure 1 This is a diagram showing the assembly of the drill rod and anchor bolt ends of the present invention;

[0011] Figure 2 This is an internal cross-sectional view of the drill rod and anchor rod end assembly of the present invention;

[0012] Figure 3 This is a schematic diagram of the drill pipe of the present invention;

[0013] Figure 4 This is a perspective view of the anchor bolt end of the present invention;

[0014] Figure 5 This is a cross-sectional view of the anchor bolt end of the present invention;

[0015] Figure 6 for Figure 5 Enlarged view of A in the middle;

[0016] Figure 7 This is a perspective view of the first connector of the present invention;

[0017] Figure 8 This is a cross-sectional view of the first connector of the present invention;

[0018] Figure 9 This is a perspective view of the second connector of the present invention;

[0019] Figure 10 This is a cross-sectional view of the second connector of the present invention;

[0020] Figure 11 for Figure 10 Enlarged view of B in the middle;

[0021] Figure 12 This is a perspective view of the arc-shaped slider of the present invention;

[0022] Figure 13 This is a schematic diagram (a) of the installation of the control screw of the present invention;

[0023] Figure 14 This is a schematic diagram (II) of the installation of the control screw of the present invention;

[0024] Figure 15 This is a cross-sectional view of the arc-shaped slider of the present invention;

[0025] Figure 16 for Figure 15 Enlarged view of C in the middle;

[0026] Figure 17 This is a schematic diagram of the assembly of the arc-shaped slider and the insert ring of the present invention. Detailed Implementation

[0027] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0028] like Figures 1-17 As shown in the figure, markings 1-27 represent: anchor bolt end 1, drill rod 2, saw teeth 3, rotating arm 4, stop block 5, internal thread 6, first side of rotating arm 7, second side of rotating arm 8, first connecting piece 9, second connecting piece 10, mounting groove 11, insert ring 12, arc-shaped through groove 13, slot 14, clamping plate 15, arc-shaped slider 16, through cavity 17, control screw 18, limit rod 19, collar 20, connecting rod 21, pad 22, rotating shaft 23, trapezoidal slot 24, threaded hole 25, smooth hole 26, bolt rod 27.

[0029] Example: Figures 1-3 As shown, this embodiment relates to a rod end device for synchronous advancement of anchor rods and drill rods. It mainly includes an anchor rod end 1 (an anchor rod end 1 is part of the anchor rod) and a drill rod 2 located within the anchor rod end 1 (an anchor rod). The anchor rod end 1 is composed of a first connecting member 9 and a second connecting member 10, and the first connecting member 9 and the second connecting member 10 are rotatably connected. A stop block 5 is welded to each end of the inner wall of the anchor rod end 1 (second connecting member 10) along its inner diameter. A rotating arm 4 is welded to each end of the outer wall of the drill rod 2 along its outer diameter, and the rotating arm 4 is perpendicular to the drill rod 2. The position of the rotating arm 4 corresponds to the position of the stop block 5. When the rotating arm 4 rotates due to being blocked by the stop block 5, it can drive the stop block 5 and the anchor rod end 1 (second connecting member 10) to rotate together.

[0030] like Figures 1-3As shown, the two stops 5 are symmetrically arranged about the axis of the anchor rod end 1, and the height of the two stops 15 (i.e., the height of the stops 15 protruding from the inner surface of the anchor rod) is small, which allows the drill bit of the drill rod 2 to pass freely in the space between the two stops 15. The stops 5 are composed of three flat plates, and a U-shaped groove for installing the rotating arm 4 is formed between the three flat plates. The U-shaped groove faces the first connector 9. Specifically, the three flat plates of the stops 5 are composed of two first flat plates arranged parallel to the axis of the second connector 10 and a second flat plate arranged perpendicular to the two first flat plates. The three flat plates of the stops 5 are connected together in sequence, and all three flat plates of the stops 5 are flush with the inner wall of the second connector 10.

[0031] like Figures 1-3 As shown, the two rotating arms 4 are symmetrically arranged around the axis of the drill rod 2, and the rotating arms 4 are rectangular in structure. When it is necessary to rotate the second connecting member 10, the rotating arm 4 can be placed into the U-shaped groove of the stop block 5, and the first side 7 or the second side 8 of the rotating arm 4 contacts the first plate. When the drill rod 2 rotates, the first side 7 or the second side 8 of the rotating arm 4 presses against a first plate of the stop block 5, thereby driving the second connecting member 10 to rotate. When it is not necessary to rotate the second connecting member 10, the rotating arm 4 can be removed from the U-shaped groove of the stop block 5.

[0032] like Figures 1-3 As shown, the anchor bolt end 1 (second connector 10) has a ring of serrations 3 around its rock-entry end. During rotation, the serrations 3 can effectively break up rock masses that obstruct the anchor bolt end 1 from entering the rock. The other end of the anchor bolt end 1, namely the first connector 9, has an internal thread 6. The internal thread 6 of the anchor bolt end 1 matches the external thread of a regular anchor bolt. The anchor bolt end 1 is connected to the regular anchor bolt through the internal thread 6 to form an integral anchor bolt.

[0033] like Figures 1-3 As shown, this embodiment also includes the following construction methods:

[0034] Two stops 5 are welded at corresponding positions on the anchor bolt end 1, and two rotating arms 4 are welded at corresponding positions on the drill rod 2. The drill rod 2 is installed inside the anchor bolt end 1, and the rotating arms 10 are placed in the U-shaped grooves of the stops 5. The drill rod 2 is driven to move, causing the first side 7 or the second side 8 of the rotating arm 4 to press against a first plate of the stops 5, so that the second connecting piece 10 rotates with the rotating arm 4. At the same time, due to the forward movement of the second plate of the stops 5, the rotating arms 4 of the drill rod 2 drive the anchor bolt end 1 and the continuously extended anchor bolt behind the anchor bolt end 1 to advance together, keeping the anchor bolt as a whole and the drill rod 2 advancing synchronously.

[0035] like Figures 4-17As shown, one end of the first connector 9 is provided with a mounting groove 11. The mounting groove 11 includes a first annular groove arranged circumferentially along the end face of the first connector 9 and a second annular groove arranged circumferentially along the inner side wall of the first connector 9. The first annular groove and the second annular groove are connected. The second annular groove is connected to the outside of the first connector 9 through a plurality of arc-shaped through grooves 13 on its outer side. The arc-shaped through grooves 13 are arranged circumferentially along the side of the first connector 9, that is, the arc-shaped through grooves 13 and the second annular groove are located on the same cross-section of the first connector 9. The width of the arc-shaped through grooves 13 is the same as the width of the second annular groove. In this embodiment, the number of arc-shaped through grooves 13 is three. Of course, other numbers can be used according to actual needs. One end face of the second connector 10 is provided with a circumferentially fitted insert ring 12 that matches the first annular groove, and the insert ring 12 can be inserted into the first annular groove. The insert ring 12 has circumferentially formed slots 14, the number and position of which correspond to the number and position of the arc-shaped through grooves 13. The width of the slots 14 is the same as the width of the second annular groove, the depth of the slots 14 is equal to the thickness of the insert ring 12, and the arc length of the slots 14 corresponds to the arc length of the arc-shaped through grooves 13. When the insert ring 12 is installed in the first annular groove, by rotating the second connector 10, the position of the slots 14 on the insert ring 12 can be aligned with the position of the arc-shaped through grooves 13 on the first connector 9. The size and shape of the arc-shaped slider 16 are adapted to the size and shape of the second annular groove, and the arc-shaped slider 16 is installed in the slots 14 of the insert ring 12 through the arc-shaped through grooves 13. By driving the second connector 10 to rotate its insert ring 12 within the first annular groove of the first connector 9, the arc-shaped slider 16 is driven to rotate within the second annular groove of the first connector 9. Simultaneously, since the cross-sectional dimension of the arc-shaped slider 16 is larger than the cross-sectional dimension of the slot 14 of the insert ring 12, the insert ring 12 can be restricted from being pulled out of the inner cavity of the first annular groove. This enables the axial load transfer between the first connector 9 and the second connector 10, allowing them to perform axial synchronous translational motion. Since the arc-shaped slider 16 can rotate circumferentially within the second annular groove, it can simultaneously satisfy the requirement for the insert ring 12 to rotate circumferentially within the first annular groove. Therefore, the first connector 9 and the second connector 10 can achieve uncoupled independent free rotation along the circumferential direction.

[0036] like Figures 4-17As shown, a retaining plate 15 is provided on each side of the slot 14. An arc-shaped slider 16 has a through cavity 17 along its arc length. In this embodiment, the cross-sectional shape of the through cavity 17 is a regular hexagon (or other shapes). A limiting rod 19 is installed at each of the two ends of the through cavity 17. The limiting rod 19 has a U-shaped opening on its end facing outwards from the port of the through cavity 17, which mates with the retaining plate 15. Both limiting rods 19 are connected by a connecting member located in the middle of the through cavity 17 via a connecting rod 21. The connecting rod 21, the limiting rods 19, and the connecting member are all movably connected. A limiting hole is connected to the side of the through cavity 17 facing outwards from the arc-shaped through groove 13. A limiting member connected to the connecting member is installed in the limiting hole. By adjusting the position of the limiting member in the limiting hole, the limiting rod 19 is moved outwards or inwards from the through cavity 17, so that the U-shaped opening is connected to or disconnected from the retaining plate 15. Specifically, the limiting component is a control screw 18. The limiting hole includes a smooth hole 26 communicating with the through cavity 17 and a threaded hole 25 communicating with the smooth hole 26. The internal thread of the threaded hole 25 matches the external thread of the control screw 18, and the length of the external thread of the control screw 18 is greater than the length of the internal thread of the threaded hole 25. The connecting component includes a collar 20 and two washers 22 respectively installed at both ends of the collar 20. The two washers 22 are a circular washer for closing the end of the collar 20 and an annular washer fitted on the control screw 18, respectively, to limit the movement of the collar 20 along the length direction of the smooth section (non-threaded section) of the control screw 18. The collar 20 can only rotate freely relative to the control screw 18. The connecting rod 21 is movably connected to the limiting rod 19 and the collar 20 respectively through the rotating shaft 23, so that the end face of the connecting rod 21 and the limiting rod 19 and the side face of the collar 20 can rotate freely. When the control screw 18 is rotated and moves along the limiting hole 18 toward the outside of the arc-shaped slider 16, the control screw 18 drives the collar 20 to move together, and the connecting rod 21 pulls the limiting rod 19 to move closer to each other. The limiting rod 19 will then retract into the through cavity 17. When the control screw 18 is rotated and moves along the limiting hole 18 toward the inside of the arc-shaped slider 16, the control screw 18 drives the collar 20 to move together, and the connecting rod 21 pushes the limiting rod 19 to move further apart. The limiting rod 19 will then protrude to the outside of the through cavity 17.

[0037] like Figures 4-17 As shown, a trapezoidal groove 24 communicating with the through cavity 17 is provided on each side of the limiting hole. The thickness of the trapezoidal groove 24 is coordinated with the width of the connecting rod 21, which can meet the up-and-down movement of the connecting rod 21 as the collar 20 moves up and down. The arc-shaped slider 16 is composed of two symmetrical blocks connected by bolt rods 27, which facilitates the free replacement of the internal components of the arc-shaped slider 16.

[0038] like Figures 4-17As shown, in this embodiment, the first connector 9 and the second connector 10 also have the following assembly method:

[0039] 1. Connect and assemble the first connector 9 and the second connector 10.

[0040] 2. Align the insertion ring 12 of the second connector 10 with the first annular groove of the first connector 9 and insert the insertion ring 12 into the first annular groove; rotate the second connector 10 so that the position of the slot 14 on the insertion ring 12 is aligned with the position of the arc-shaped through groove 13 on the first connector 9.

[0041] 3. Rotate the control screw 18 to fully retract the limiting rod 19 into the through cavity 17, and insert the arc-shaped slider 16 into the slot 14 of the insert ring 12 of the second connector 10 through the arc-shaped through groove 13 of the first connector 9. At this time, the U-shaped openings at both ends of the through cavity 17 are aligned with the positions of the two retaining plates 15 in the slot 14 of the insert ring 12. Rotate the control screw 18 to move the limiting rod 19 outward along the through cavity 17, so that the retaining plates 15 are inserted into the U-shaped openings of the limiting rod 19. Tighten the control screw 18, at which point the control screw 18 is completely placed inside the arc-shaped slider 16.

[0042] This embodiment also has the following beneficial effects: it enables the anchor rod end to rotate coupled with the drill rod, and simultaneously synchronizes the drilling depth into the rock with the anchor rod's entry into the hole; because the drilling depth into the rock is synchronized with the anchor rod's entry into the hole, the distance between the anchor rod end and the drill bit is relatively close, and the drill cuttings generated during the rock-breaking process remain suspended under water flushing or air blowing conditions, making it easy to enter the inner cavity of the anchor rod; by using a non-coupled free-rotation assembly connection between the anchor rod end and the other anchor rods, the rotation of the anchor rod end will not cause the other anchor rods to rotate with the drill rod, which can effectively reduce the rotational power loss of the drill rod and improve construction efficiency.

[0043] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A rod end device for achieving synchronous advance of anchor rods and drill rods, characterized in that: The device includes an anchor bolt end and a drill rod located within the anchor bolt end. The anchor bolt end is composed of a first connector and a second connector, which are rotatably connected. Two stops are symmetrically connected to the inner wall of the inner cavity at the rock-entry end of the anchor bolt end. The drill rod has rotating arms connected to its outer wall, the number and position of which correspond to the number and position of the stops. When the rotating arms rotate due to the obstruction of the stops, they drive the stops and the second connector of the anchor bolt end to rotate together. Each stop is composed of three flat plates, and a U-shaped groove for installing the rotating arms is formed between the three flat plates. The first connector has a mounting groove at one end. The mounting groove includes a first annular groove arranged circumferentially along the end face of the first connector and a second annular groove arranged circumferentially along the inner side wall of the first connector. The first annular groove is connected to the second annular groove. The second annular groove is connected to the outside of the first connector through a plurality of arc-shaped through grooves on its outer side. The arc-shaped through grooves are arranged circumferentially along the side side of the first connector. The arc-shaped through grooves and the second annular groove are located on the same cross-section of the first connector. The width of the arc-shaped through groove is the same as the width of the second annular groove. The second connector has a circumferentially provided insert ring on one end face that is adapted to the first annular groove and is inserted into the first annular groove. The insert ring has slots along the circumferential direction of the second connector, the number and position of which correspond to the number and position of the arc-shaped through grooves, and the width of the slots is the same as the width of the second annular groove. The depth of the slots is equal to the thickness of the insert ring, and the arc length of the slots corresponds to the arc length of the arc-shaped through grooves. When the insert ring is installed in the first annular groove, the position of the slots on the insert ring is aligned with the position of the arc-shaped through grooves on the first connector by rotating the second connector. The arc-shaped slider is installed in the slot of the insert ring through the arc-shaped through groove; by driving the second connector, the insert ring rotates in the first annular groove of the first connector, thereby driving the arc-shaped slider to rotate in the second annular groove of the first connector, restricting the insert ring from being pulled out of the inner cavity of the first annular groove, realizing the axial load transfer between the first connector and the second connector to perform axial synchronous translational motion; the arc-shaped slider rotates circumferentially in the second annular groove, while the insert ring rotates circumferentially in the first annular groove, so that the first connector and the second connector can achieve uncoupled independent free rotation in the circumferential direction; Each side of the slot is provided with a retaining plate; the arc-shaped slider has a through cavity along its arc length, the cross-sectional shape of the through cavity is a regular hexagon, and a limiting rod is installed at each of the two ends of the through cavity. The limiting rod has a U-shaped opening on the end facing out of the through cavity port that cooperates with the retaining plate. Both limiting rods are connected by a connecting rod to a connector located in the middle of the through cavity. The connecting rod, the limiting rod, and the connector are all movably connected. A limiting hole is connected to the middle of the through cavity on the side facing out of the arc-shaped through groove. A limiting member connected to the connector is installed in the limiting hole.

2. The rod end device for achieving synchronous advance of anchor rod and drill rod as described in claim 1, characterized in that: One end of the anchor rod has a serrated ring around its rock-entry end, and the other end of the anchor rod is threadedly connected to a regular anchor rod to form an integral anchor rod.

3. The rod end device for achieving synchronous advance of anchor rod and drill rod as described in claim 1, characterized in that: The two stops are symmetrically arranged with respect to the axial direction of the anchor rod end, and the height of the two stops is sufficient for the drill bit of the drill rod to pass freely in the space between the two stops.

4. The rod end device for achieving synchronous advance of anchor rod and drill rod as described in claim 1, characterized in that: The two rotating arms are symmetrically arranged with respect to the axis of the drill rod, and the rotating arms are rectangular in structure.

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