Grouting assembly and operating arm of a jumbo with the grouting assembly

Abstract

This application discloses a grouting assembly for installing anchor bolts, including a fixed base and a grouting pipe. The anchor bolt includes a hollow rod body and a nut and a washer fitted onto the rod body. The grouting pipe includes an outer pipe and an inner pipe. The outer pipe is rotatably mounted on the fixed base and has a first end and a second end. The first end is provided with a nut sleeve for rotating the nut to lock the anchor bolt. The nut sleeve has a through hole communicating with the outer pipe, at least partially matching the shape of the nut for the rod body to pass through. The inner pipe extends partially into the interior of the outer pipe from the second end and is axially movable relative to the outer pipe. During grouting, the end extending into the interior of the outer pipe mates with the rod body of the anchor bolt. The rotation of the outer pipe drives the inner pipe to move and avoid the anchor bolt extending into the outer pipe, preventing damage to internal components. The inner pipe can also move to mate with the rod body before grouting operations, ensuring sealing during grouting.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, specifically a grouting assembly and the operating arm of an anchor bolt trolley having the grouting assembly. Background Technology

[0002] The grouting assembly for installing anchor bolts is mainly used in tunnel support. It is mainly used to clamp the anchor bolt and deliver it into the anchor bolt installation hole, and rotate the anchor bolt so that the anchor head at the front end of the anchor bolt is fixed relative to the hole wall.

[0003] For example, Chinese patent document CN 210622827 U discloses an anchor grouting and nut tightening mechanism for tunnel support construction equipment. The rotating sleeve is used to fix the anchor rod, and the rotating sleeve is rotated by a motor-driven rotating sprocket to fix the anchor rod to the hole wall. When the rotating sleeve at the front end moves forward, it is easy to collide with the rock wall and be damaged. In addition, during the tightening of the nut, the anchor rod will extend into the grouting assembly, affecting the internal components. Summary of the Invention

[0004] This application provides a grouting assembly that offers enhanced safety in use.

[0005] A grouting assembly for installing an anchor bolt, the anchor bolt comprising a hollow rod body and a nut and a washer fitted onto the rod body, the grouting assembly comprising a fixing seat and a grouting pipe, the grouting pipe comprising:

[0006] The outer tube is rotatably mounted on a fixed base and has a first end and a second end. The first end is provided with a nut sleeve for rotating a nut to lock the anchor rod. The nut sleeve has a through hole that communicates with the outer tube and is at least partially shaped to match the nut for the rod body to pass through.

[0007] The inner tube extends partially into the interior of the outer tube from the second end and can move axially relative to the outer tube. During grouting, the end extending into the interior of the outer tube connects with the rod body of the anchor rod.

[0008] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0009] Optionally, the inner tube is partially provided with external threads, and the outer tube is partially provided with matching internal threads. When the outer tube rotates along the first circumferential direction to turn the nut, it drives the inner tube to move away from the first end to avoid the rod body. When the outer tube rotates along the second circumferential direction, it drives the inner tube to move closer to the first end so that it aligns with the rod body of the anchor rod. The first circumferential direction and the second circumferential direction are opposite.

[0010] Optionally, the fixed base is slidably mounted with a guide rod that is linked to the inner tube and a first elastic element that acts on the guide rod to move the inner tube toward the first end.

[0011] Optionally, one end of the inner tube located outside the outer tube is connected to one end of the guide rod via a connecting rod, and the first elastic element is a spring sleeved on the guide rod, with both ends of the spring abutting against the other end of the guide rod and the fixed seat, respectively.

[0012] Optionally, the end of the inner tube that extends into the outer tube is provided with a cap that seals and connects to the rod.

[0013] Optionally, the first end of the outer tube is provided with an anti-collision nozzle protruding from its end face and movable along its axial direction, and a second elastic member acting on the anti-collision nozzle to reset it.

[0014] Optionally, the anti-collision nozzle includes a conical part and a straight part that is sleeved with the outer tube. The nut sleeve is threadedly connected to the outer tube and is provided with a limiting protrusion that protrudes radially from the outer wall of the outer tube to restrict the anti-collision nozzle from disengaging. The straight part has a relief groove to avoid the limiting protrusion.

[0015] Optionally, the grouting assembly includes a drive device, which includes a motor and a transmission assembly disposed between the motor output shaft and the outer tube.

[0016] Optionally, the through hole is provided with a tapered portion that has a guiding function.

[0017] This application also provides an operating arm for an anchor bolt trolley having the above-mentioned grouting components, including:

[0018] The propulsion beam extends along the first direction;

[0019] The first slide plate is slidably mounted on the push beam and can reciprocate along the first direction;

[0020] The drilling assembly is slidably mounted on the first sliding plate and can reciprocate along the second direction, having a first working position for drilling into the rock wall and a first standby position for avoiding the grouting pipe;

[0021] Any of the grouting components described herein is mounted on the first slide plate and works alternately with the drilling component. The grouting pipe is movable relative to the first slide plate and has a second working position for preparing to grout into the borehole and a second standby position for avoiding the drilling component.

[0022] The grouting assembly of this application tightens the anchor bolt by rotating the outer tube. During tightening, the inner tube moves axially to avoid the anchor bolt body extending into the outer tube, thus preventing damage to internal components. During grouting, the inner tube moves axially again to connect with the anchor bolt body, reducing grout leakage during the grouting operation. Attached Figure Description

[0023] Figure 1 This is a perspective view of the operating arm of an anchor bolt trolley according to an embodiment of this application;

[0024] Figure 2 A schematic diagram of the structure of the anchor bolts used in the operating arm of the anchor bolt trolley in this application;

[0025] Figure 3 This is an exploded view of the drilling assembly in the operating arm of the anchor bolt trolley in this application.

[0026] Figure 4 This is a perspective view of the first slide plate when the front and rear parts of the operating arm of the anchor bolt trolley in this application are connected and the drilling assembly is in the first working position.

[0027] Figure 5 This is a perspective view of the first slide plate when the front and rear parts of the operating arm of the anchor bolt trolley in this application are separated and the drilling assembly is in the first standby position.

[0028] Figure 6 This is a schematic diagram of the grouting assembly in the operating arm of the anchor bolt trolley in this application when it is in the second working position;

[0029] Figure 7 This is a schematic diagram of the grouting assembly in the operating arm of the anchor bolt trolley in this application when it is in the second standby position;

[0030] Figure 8 This is a schematic diagram of the first chain structure in the operating arm of the anchor bolt trolley in this application;

[0031] Figure 9 for Figure 8 Another state diagram;

[0032] Figure 10 for Figure 8 Enlarged view of section A in the middle;

[0033] Figure 11 This is a three-dimensional structural view of the grouting assembly of this application;

[0034] Figure 12 for Figure 11 A sectional view along the vertical direction of the outer tube axis;

[0035] Figure 13 for Figure 12 Another state diagram;

[0036] Figure 14 for Figure 12 Enlarged view of section B in the middle.

[0037] The annotations in the figure are explained as follows:

[0038] 1. Propulsion beam; 11. First chain; 12. Driving sprocket; 13. Driven sprocket; 14. Fiber guiding mechanism;

[0039] 21. First skateboard; 211. Front;

[0040] 212. Rear section; 2121. Rear base; 2122. Rear slide plate; 2123. Guide rail; 2124. Hydraulic cylinder;

[0041] 22. Drilling assembly;

[0042] 23. Locking mechanism; 231. Connecting rod; 232. Connecting hole;

[0043] 3. Grouting components;

[0044] 31. Grouting pipe; 311. Fixing base;

[0045] 314. Nut sleeve; 3141. Limiting protrusion; 3142. Through hole; 3143. Tapered part;

[0046] 315. Anti-collision nozzle; 3151. Conical section; 3152. Straight section; 3153. Clearance groove;

[0047] 316. Second elastic element;

[0048] 317. Outer tube; 3171. Rotary sleeve;

[0049] 318. Inner tube; 3181. Guide rod; 3182. First elastic element; 3183. Connecting rod; 3184. Cap body;

[0050] 3185, stepped hole;

[0051] 32. Lifting frame; 321. First support rod; 322. Second support rod; 323. Hydraulic cylinder;

[0052] 33. Drive unit; 331. Motor; 332. Bushing; 333. Bearing; 334. Bevel gear set;

[0053] 4. Rod bracket; 6. Drill rod;

[0054] 7. Anchor bolt; 71. Nut; 72. Washer plate; 73. Rod body;

[0055] 8. Anchor bolt storage. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] like Figure 2 As shown, the anchor rod 7 generally includes a hollow rod body 73, a nut 71 and a washer 72 fitted onto the rod body 73, and an anchor head (not shown in the figure) is also provided at the distal end of the rod body 73. The installation process requires pre-drilling holes in the rock wall, then inserting the anchor rod 7 into the anchor rod installation hole. After installation, the nut 71 is turned to lock the anchor rod 7. To achieve anchoring, grout needs to be injected into the drilled hole through the anchor rod. Existing materials can be used for the grout, which will not be described in detail here.

[0061] like Figures 11-14As shown, this application provides a grouting assembly 3 for installing anchor rods, including a grouting pipe 31 composed of an outer pipe 317 and an inner pipe 318, and a fixing seat 311 for fixing the grouting pipe 31. The outer pipe 317 is rotatably mounted on the fixing seat 311 and has a first end and a second end. The first end is provided with a nut sleeve 314 for rotating a nut 71 to lock the anchor rod 7. The nut sleeve 314 has a through hole 3142 that at least partially conforms to the outer contour of the nut 71 and communicates with the grouting pipe 31 for the rod body 73 to pass through. The through hole 3142 includes a front section that engages with the nut 71 for locking and a rear section that is a circular hole. The front and rear sections form a step that abuts against the nut 71 for assembly. The shape of the front section conforms to the shape of most nuts, such as a regular hexagon. When the anchor rod 7 is inserted into the grouting pipe 31, it is relatively fixed circumferentially with the grouting pipe 31 by the engagement of the nut 71 and the nut sleeve 314, and can rotate synchronously.

[0062] The inner tube 318 is a hollow pipe that extends partially into the interior of the outer tube 317 from the second end of the outer tube 317 and can move axially relative to the outer tube 317. During grouting operations, one end of the inner tube that extends into the outer tube connects to the rod body of the anchor rod 7, while the other end of the inner tube 318 is located outside the outer tube 317 and is used to connect the grouting hose (not shown in the figure). The area where the inner tube 318 connects with the rod body 73 is provided with a corresponding sealing element (not shown in the figure), such as a polyurethane sealing ring.

[0063] In this embodiment, when the anchor rod 7 is rotated in the outer tube, the grouting assembly 3 moves the rod 73 to the second end relative to the outer tube 317. During grouting, the inner tube 318 moves to connect with the rod 73, and the grout is transported through the grouting hose, completing the grouting operation sequentially through the inner tube 318 and the anchor rod 7. Throughout the process, since the length of the rod 73 extending into the outer tube 317 is immeasurable, compared to traditional structures, it protects the internal components from damage caused by the movement of the rod 73. Furthermore, the grouting hose achieves a sealed connection with the anchor rod 7 through the inner tube 318, ensuring a safe, reliable, and leak-free grouting operation. In a preferred embodiment, one end of the inner tube 318 extending into the outer tube 317 is provided with a cap 3184 for sealing and connecting the rod 73. The cap 3184 has a stepped hole 3185, and a sealing element is disposed within the stepped hole 3185 for better sealing of the rod 73.

[0064] In one embodiment, the inner tube 318 is partially provided with external threads, and the outer tube 317 is partially provided with internal threads that mate with these external threads. When the outer tube 317 rotates along the first circumferential direction to rotate the nut 71, it drives the inner tube 318 to move away from the first end to avoid the rod body 73, until the anchor rod 7 is locked. Immediately afterwards, the grouting assembly 3 slides towards the second end, causing the nut sleeve 314 to disengage from the nut. When the outer tube 317 rotates along the second circumferential direction, it drives the inner tube 318 to move closer to the first end, so that it aligns with the rod body 73 of the anchor rod 7, completing the sealing connection before the grouting operation. The first and second circumferential directions are opposite. By changing the direction of rotation, the anchor rod locking and the sealing connection with the rod body can be completed. Specifically, in this embodiment, refer to... Figure 12 and Figure 13 A rotating sleeve 3171 is threaded or welded to the second end of the outer tube 317. The rotating sleeve 3171 is fixed relative to the outer tube 317 and rotates synchronously and in the same direction as the outer tube 317. The rotating sleeve 3171 has an internal thread that matches the external thread of the inner tube 318, so that the rotation of the outer tube 317 drives the rotation of the inner tube 318 and allows them to slide relative to each other.

[0065] During the actual tightening of nut 71, the outer tube 317 may rotate for an excessively long time along the first circumferential direction. Furthermore, since the inner tube 318 is only partially threaded, there may be a situation where the inner tube 318 and outer tube 317 are not threadedly engaged, causing the rod 73 to abut against the inner tube 318 and pull it out of the outer tube 317. To ensure that the inner tube 318 can promptly engage with the rod 73 during grouting, the inner tube 318 can be driven by the outer tube 317 through threads. In one embodiment, a guide rod 3181 linked to the inner tube 318 and a first elastic element 3182 acting on the guide rod 3181 to move the inner tube 318 towards the first end are slidably mounted on the fixing base 311. Even without thread engagement, the first elastic element 3182 can push the inner tube 318 to the starting position where it is threadedly connected to the outer tube 317.

[0066] In one embodiment, one end of the inner tube 318 located outside the outer tube 317 is connected to one end of the guide rod 3181 via a connecting rod 3183. The first elastic element 3182 is a spring sleeved on the guide rod 3181. The two ends of the spring abut against the other end of the guide rod 3181 and the fixed seat 311, respectively. The guide rod 3181 is installed parallel to the fixed seat 311 along the direction of the inner tube 318. One end of the connecting rod 3183 has a through hole for the inner tube 318 to rotate, and the other end is fixedly connected to the guide rod 3181. When the inner tube 318 moves toward the second end and abuts against the connecting rod 3183, it drives the guide rod 3181 to move, while compressing the spring.

[0067] like Figures 12-14As shown, in one embodiment, the first end of the outer tube 317 is provided with an anti-collision nozzle protruding from its end face and movable along its axial direction, and a second elastic element 316, such as a spring, acts on the anti-collision nozzle 315 to reset it. During grouting operations, when the anti-collision nozzle 315 abuts against the rock wall, it is buffered by the second elastic element 316, indicating that the anchor bolt 7 is approaching its limit value, and the anchor bolt 7 can be tightened to prevent other components from touching the rock wall and causing damage.

[0068] In one embodiment, the anti-collision nozzle 315 includes a conical portion 3151 and a straight portion 3152 that is sleeved with the outer tube 317. The nut sleeve 314 is threadedly connected to the outer tube 317 and is provided with a limiting protrusion 3141 that radially protrudes from the outer wall of the outer tube 317 to restrict the anti-collision nozzle 315 from disengaging. The conical portion 3151 gradually extends radially outward from the end of the straight portion 3152 near the rock wall to form a flared structure, which facilitates the assembly of the nut sleeve 314 and serves as a guide when the anchor rod 7 is engaged with the nut sleeve 314. Correspondingly, the straight portion 3152 has a relief groove 3153 to avoid the limiting protrusion 3141. After the nut sleeve 314 is tightened, the limiting protrusion 3141 abuts against the end face of the grouting pipe 31, indicating that the nut sleeve 314 is properly assembled, facilitating operation.

[0069] Please refer to this again. Figures 11-14 In one embodiment, the grouting assembly 3 includes a drive device 33, which includes a motor 331 and a transmission assembly disposed between the motor output shaft and the outer tube 317. The transmission assembly consists of a bevel gear set 334 disposed between the bushing 332 and the motor output shaft, and a bearing 333 disposed between the bushing 332 and the fixed base 311. The bushing 332 and the outer tube 317 are connected by a key, allowing them to rotate synchronously. The bevel gear set 334 can switch between the rotation direction of the motor output shaft at different positions and the rotation direction of the grouting pipe 31, and can easily calculate and scale up or down the motor rotation speed to change the rotation speed of the rod 73. Two sets of bearings 333 are located at the front and rear ends of the bushing 332, respectively, to ensure smoother rotation of the bushing 332.

[0070] like Figures 1-9 As shown, this application also provides an operating arm for an anchor bolt trolley equipped with the grouting assembly 3 of the above embodiment, including a propulsion beam 1 and a drilling assembly 22. The drilling assembly 22 is inserted and fixed with a drill rod 6 for drilling anchor bolt installation holes in the rock wall; it can use an existing rock drill. The operating arm generally also includes an anchor bolt magazine 8 for storing and transporting anchor bolts 7 to the grouting assembly 3, enabling unmanned installation of anchor bolts 7.

[0071] The propulsion beam 1 is a straight section profile with its own length direction as the first direction. The propulsion beam 1 extends along the first direction and has a front end and a rear end. The front end abuts against the rock wall to achieve relative fixation between the operating arm and the rock wall, which facilitates drilling by the drilling assembly 22 or grouting by the grouting assembly 3.

[0072] The first sliding plate 21 is used to support and fix the drilling assembly 22 and the grouting assembly 3, and is slidably mounted on the propulsion beam 1. A matching slide rail and slide path are generally provided between the two, allowing the first sliding plate 21 to slide along a first direction. The first sliding plate 21 is divided into a front part 211 and a rear part 212 along the first direction, and a locking mechanism 23 is provided between the two parts. It also has the following features:

[0073] In the combined state, locking mechanism 23 locks, and the two parts are relatively fixed and slide synchronously;

[0074] In the separated state, locking mechanism 23 releases, the two parts separate, and at least one of them can slide.

[0075] The drilling assembly 22 is slidably mounted on the rear part 212, and the sliding direction is a second direction that is not the same as the first direction. A first driving mechanism for driving the drilling assembly 22 to slide is generally provided between the drilling assembly 22 and the rear part 212, and has the following characteristics:

[0076] In the first working position, the drilling assembly 22 is located at the rear end of the propulsion beam 1, and its drill rod axis is located at the center line of the propulsion beam 1. At the same time, the locking mechanism 23 is locked, and the front part 211 and the rear part 212 of the first sliding plate 21 are engaged. In this position, the drilling assembly 22 can slide along the first direction to perform drilling operations on the rock wall.

[0077] In the first standby position, after drilling is completed, the drilling assembly 22 has retracted to the rear end of the propulsion beam 1 along the first direction and slides along the second direction, causing the drill rod 6 to move synchronously, making room for the grouting pipe 31 to work, which facilitates subsequent grouting operations.

[0078] Grouting assembly 3 is connected and fixed to the front part 211 of first slide plate 21. Grouting assembly 3 is provided with a second drive mechanism for moving grouting pipe 31. Grouting pipe 31 has the following characteristics depending on the second drive mechanism:

[0079] In the second working position, the drilling assembly 22 slides to the first standby position, and the grouting pipe 31 moves close to the first sliding plate 21 until its axis is aligned with the anchor bolt mounting hole. At this time, the locking mechanism 23 is released, and the front part 211 and the rear part 212 of the first sliding plate 21 are separated. The grouting pipe 31 can slide along the first direction, connect with the anchor bolt, and send the anchor bolt into the borehole for grouting. Alternatively, it can slide directly to align with the anchor bolt mounting hole for grouting.

[0080] In the second standby position, the grouting pipe 31 moves away from the first sliding plate 21 until space is provided for the drilling assembly 22 to complete the drilling operation when it is in the first working position. This allows the grouting pipe 31 and the drilling assembly 22 to work alternately. Specifically, the grouting pipe 31 is in the second standby position, and the drilling assembly 22 is in the first working position. The two work together and slide synchronously towards the front end to perform the drilling operation. After completion, they retract to the rear end, and the drilling assembly 22 slides along the second direction until it is in the first standby position. The grouting pipe 31 moves and is in the second working position. The two separate and perform the corresponding grouting operation.

[0081] The switching of positions between the drilling assembly 22 and the grouting assembly 3 constitutes the operating procedure of the manipulator. Specifically, the drilling assembly 22 is in the first working position. After the manipulator is relatively fixed against the rock wall, the drilling assembly 22 slides forward along the first direction to perform drilling. After drilling is completed, the drilling assembly 22 slides backward along the first direction to the rear end of the propulsion beam 1, simultaneously forming an anchor bolt installation hole on the rock wall. Subsequently, the drilling assembly 22 slides along the second direction to the first standby position. The grouting pipe 31 of the grouting assembly 3 moves to the second working position, connects with the anchor bolt 7, slides forward along the first direction, and inserts the anchor bolt 7 into the anchor bolt installation hole. Grout is then delivered. After grouting is completed, the grouting assembly 3 retreats along the first direction to the rear end 212, moves the grouting pipe 31 to the second standby position, and the drilling assembly 22 slides back to the first working position. The manipulator then moves to the next rock wall for a new round of operations.

[0082] In this embodiment, the operating arm of the anchor trolley improves the arrangement of the drilling assembly 22 and the grouting assembly 3 to be arranged in front and behind. The plate for sliding the drilling assembly 22 is a single plate, and it is used only for the drilling assembly 22 to slide. Compared with the traditional structure where the drilling assembly 22 and the grouting assembly 3 are arranged parallel to each other in the first direction and must rely on the sliding and switching between the plates, this eliminates the gaps between multiple plates, making the sliding smoother, reducing the jamming failure rate, and improving product stability.

[0083] like Figure 4 and Figure 5 As shown, the first driving mechanism in this embodiment specifically includes a rear part 212 comprising a rear base 2121 and a rear slide plate 2122 slidably disposed on the rear base 2121. A guide rail 2123 for sliding guidance is also provided between the two, as well as an oil cylinder 2124 for driving the rear slide plate 2122 to slide back and forth.

[0084] In order to effectively achieve alternating operation of the two, in one embodiment, the first direction and the second direction are perpendicular to each other, so that the sliding stroke of the drilling assembly 22 is minimized, the sliding failure rate is reduced, and the size of the corresponding component is reduced, thereby reducing production costs.

[0085] The locking mechanism 23, which functions to engage and disengage, has the following specific structure: Figures 3-6 As shown, in one embodiment, one of the front portion 211 and the rear portion 212 of the first sliding plate 21 is provided with a connecting rod 231 extending along a second direction, and the other is provided with a connecting hole 232 that mates with the connecting rod 231. The component provided in the rear portion 212 slides synchronously with the drilling assembly 22. For example, the connecting rod 231 protrudes from the front portion of the rear portion 212 along the second direction, in the same sliding direction as the drilling assembly 22. When the drilling assembly 22 is in the first working position, the connecting rod 231 is inserted into the connecting hole 232; conversely, when the drilling assembly 22 is in the first standby position, the connecting rod 231 is disengaged from the connecting hole 232. Therefore, the drilling assembly 22 can achieve engagement and disengagement simply by switching between the first working position and the first standby position, without the need for additional unlocking components. The structure is simple, and the engagement / disengagement of the grouting assembly 3 and the drilling assembly 22 is completed.

[0086] like Figures 1-10 As shown, in one embodiment, the propulsion beam 1 is provided with a drive mechanism that drives the front part 211 of the first slide plate 21 to slide along a first direction. The drive mechanism includes a first chain 11 arranged along the first direction, and the front part 211 of the first slide plate 21 is partially fixedly connected to the first chain 11. The rear end and front end of the propulsion beam 1 are respectively provided with a driving sprocket 12 and a driven sprocket 13, which are tensioned and fixedly connected to the first chain 11 and make it into a closed waist shape. The first slide plate 21 relies on the drive of the driving sprocket 12 to slide back and forth synchronously with the first chain 11 to complete drilling or conveying anchor bolts. Compared with the belt transmission mechanism, it has higher precision, simpler structure, easier maintenance, and is suitable for high-frequency vibration environments.

[0087] The second drive mechanism is specifically as follows: Figures 6-9 As shown, in one embodiment, the grouting assembly 3 includes a lifting frame 32 for moving the grouting pipe 31 to switch between a second working position and a second standby position. The grouting pipe 31 moves away from / closes to the propulsion beam 1 by means of the lifting frame 32. In the second working position, the grouting pipe 31 descends and approaches the propulsion beam 1 until its axis is aligned with the anchor bolt mounting hole. In the second standby position, the grouting pipe 31 rises and moves away from the propulsion beam 1, providing space for the drilling assembly 22 to slide forward, thereby enabling the drilling assembly 22 and the grouting assembly 3 to work alternately.

[0088] In one embodiment, the lifting frame 32 includes a first support rod 321 and a second support rod 322 hinged to the front part 211 of the first sliding plate 21. The grouting pipe 31 is also hinged to the first support rod 321 and the second support rod 322. The front part 211 of the first sliding plate 21, the first support rod 321, the second support rod 322, and the grouting pipe 31 constitute a foldable four-bar linkage. A hydraulic cylinder 323 or a pneumatic cylinder is provided on the front part 211 and pivotally connected to one of the support rods. The hydraulic cylinder 323 drives the support rod, and the folding / unfolding operation is completed by the four-bar linkage. When folding, the four-bar linkage lowers the grouting pipe 31 closer to the propulsion beam 1; when unfolding, it raises the grouting pipe 31 away from the propulsion beam 1. The plane along the movement path of the grouting pipe 31 is always the same as the vertical plane of the propulsion beam 1 along the first direction. Compared to the traditional mechanism where the grouting assembly 3 and the drilling assembly 22 are arranged in parallel and slide to switch, the drilling assembly 22 may be positioned outside the propulsion beam 1. In this embodiment, the drilling assembly 22 only needs to slide along the second direction to create space for the grouting pipe 31 to work, thus reducing the sliding stroke along the second direction. This reduces the offset of the center of gravity of the operating arm due to the movement of the drilling assembly 22, improves the coaxial accuracy of the anchor rod 7 or the grouting pipe 31 and the anchor rod mounting hole, and facilitates subsequent delivery of the anchor rod 7 or direct grouting operations. Furthermore, in the first working position, compared to the traditional structure where the grouting assembly 3 is arranged in parallel and outside the propulsion beam 1, in this application, both the grouting assembly 3 and the drilling assembly 22 in the operating arm are on the propulsion beam 1. This reduces the vibration of the grouting assembly 3 itself and its impact on the operating arm during high-frequency drilling, improving product stability. In the second working position, the drilling assembly 22 is positioned in a structure where the entire drilling assembly 22 is located outside the propulsion beam 1, rather than in a traditional drilling assembly 22. This reduces the load on the rear end of the propulsion beam 1 and extends the service life of the propulsion beam 1.

[0089] In one embodiment, during the movement of the grouting pipe 31, the first support rod 321 and the second support rod 322 rotate in the same direction, ensuring that the grouting pipe 31 always extends along the first direction. The four-bar linkage is a parallelogram structure, which ensures that the grouting pipe 31 remains horizontal with the propulsion beam 1. This prevents interference with the drilling assembly 22 at the rear end when the grouting pipe 31 descends to the front end of the propulsion beam 1 to the second working position, and maintains coaxiality with the anchor bolt mounting hole, facilitating the horizontal installation of the anchor bolt 7.

[0090] In the grouting assembly of this application, when the nut 71 is tightened on the outer tube 317, the inner tube 318 is driven to move synchronously to avoid the rod 73 extending into the outer tube 317, thus preventing the rod 73 from damaging the inner tube 318 or other components. The outer tube 317 rotates in the opposite direction, driving the inner tube 318 to move and engage with the rod 73. A sealing element is provided between the inner tube 318 and the rod 73 to reduce leakage of grout at the joint between the inner tube 318 and the rod 73 during the transportation process.

[0091] The outer tube 317 is fitted with an anti-collision nozzle 315 that contacts the rock wall first during grouting operations, and a second elastic element 316 for cushioning. This effectively protects the nut sleeve 314, indicates that the grouting assembly 3 has slipped to the bottom, and restricts its further movement, improving the safety of the grouting assembly 3 and preventing the nut sleeve or other components from breaking due to contact with the rock wall. The hollow design of the grouting pipe 31 provides sufficient space for the rod body 73 to rotate relative to the nut 71 during the rotation of the anchor rod 7, preventing damage to internal components and improving safety.

[0092] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0093] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. An anchor bolt trolley's operating arm, used for installing anchor bolts, the anchor bolt comprising a hollow rod body and a nut and washer fitted onto the rod body, characterized in that, The operating arm includes: A propulsion beam extends along a first direction, which is the length direction of the propulsion beam itself; The first slide plate is slidably mounted on the push beam and can slide back and forth along the first direction. The first slide plate is divided into a front part and a rear part along the first direction. The front part and the rear part have a combined state that can slide synchronously and a separated state that can slide independently. The drilling assembly is slidably mounted on the rear of the first slide plate, can reciprocate along the second direction, and has a first working position for drilling the rock wall and a first standby position for avoiding the grouting assembly, wherein the first direction and the second direction are perpendicular to each other. A grouting assembly is installed on the front of the first slide plate. The grouting assembly includes a fixed base, a grouting pipe, and a lifting frame for moving the grouting pipe. The grouting pipe includes an outer pipe and an inner pipe. The outer pipe is rotatably mounted on the fixed base and has a first end and a second end. The first end is provided with a nut sleeve for rotating a nut to lock the anchor rod. The nut sleeve has a through hole communicating with the outer pipe, at least partially matching the shape of the nut for the rod body to pass through. The inner pipe extends partially into the interior of the outer pipe from the second end and can move axially relative to the outer pipe. During grouting, the end extending into the interior of the outer pipe engages with the rod body of the anchor rod. When the outer pipe rotates along a first circumferential direction to rotate the nut, it drives the inner pipe to move away from the first end to avoid the rod body. When the outer pipe rotates along a second circumferential direction, it drives the inner pipe to move closer to the first end, so that it engages with the rod body of the anchor rod. The first circumferential direction and the second circumferential direction are opposite. The grouting pipe has a second working position for preparing to inject grout into the borehole and a second standby position for avoiding the borehole assembly. The grouting pipe and the borehole assembly alternately occupy their respective working positions. When the borehole assembly enters the first working position, the lifting frame drives the grouting pipe to rise away from the propulsion beam and enter the second standby position. When the borehole assembly is in the first standby position, the lifting frame can drive the grouting pipe to descend and approach the propulsion beam to enter the second working position. When the drilling assembly is in the first working position, the front and rear parts of the first slide plate are in a combined state; when the grouting pipe is in the second working position, the front and rear parts of the first slide plate are in a separated state.

2. The operating arm of the anchor bolt trolley according to claim 1, characterized in that, The inner tube has a portion of external threads, and the outer tube has a portion of matching internal threads.

3. The operating arm of the anchor bolt trolley according to claim 2, characterized in that, The fixed base is slidably mounted with a guide rod that is linked to the inner tube and a first elastic element that acts on the guide rod to move the inner tube toward the first end.

4. The operating arm of the anchor bolt trolley according to claim 3, characterized in that, The inner tube is located outside the outer tube at one end, which is connected to one end of the guide rod via a connecting rod. The first elastic element is a spring that is sleeved on the guide rod, and the two ends of the spring abut against the other end of the guide rod and the fixed seat, respectively.

5. The operating arm of the anchor bolt trolley according to claim 2, characterized in that, The inner tube is fitted with a cap that seals and connects to the rod at one end where it extends into the outer tube.

6. The operating arm of the anchor bolt trolley according to claim 1, characterized in that, The first end of the outer tube is provided with an anti-collision nozzle that protrudes from its end face and can move along its axial direction, and a second elastic element that acts on the anti-collision nozzle to reset it.

7. The operating arm of the anchor bolt trolley according to claim 6, characterized in that, The anti-collision nozzle includes a conical part and a straight part that is sleeved with the outer tube. The nut sleeve is threaded to the outer tube and is provided with a limiting protrusion that protrudes radially from the outer wall of the outer tube to restrict the anti-collision nozzle from disengaging. The straight part has a relief groove to avoid the limiting protrusion.

8. The operating arm of the anchor bolt trolley according to claim 1, characterized in that, The grouting assembly includes a drive device, which includes a motor and a transmission assembly disposed between the motor output shaft and the outer tube.

9. The operating arm of the anchor bolt trolley according to claim 1, characterized in that, The through hole is provided with a tapered part that has a guiding function.

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