Bolting and grouting integrated device and anchor rod construction equipment

Abstract

The utility model discloses a bolting and grouting integrated device and anchor rod construction equipment, and relates to the technical field of tunnels and underground engineering. The bolting and grouting integrated device comprises a mounting frame, a first rotary driving part, a second rotary driving part, a first hollow rotating shaft in transmission connection with the first rotary driving part and a second hollow rotating shaft in transmission connection with the second rotary driving part, and the first hollow rotating shaft is coaxially sleeved with the second hollow rotating shaft; one end of the first hollow rotating shaft is connected with grouting equipment, the other end is connected with an anchor rod, and the second hollow rotating shaft is clamped with a nut on the anchor rod. The installation efficiency of the anchor rod can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnels and underground engineering, in particular to an anchoring and grouting integrated device and an anchor rod construction equipment. BACKGROUND

[0002] The current tunnel anchor rod installation process mainly includes the following steps: drilling and installing an anchor rod, grouting an anchoring section, after the grout is filled, a anchor rod puller is sleeved on the anchor head, a steel plate and a nut are added to the end of the anchor head, and after being fixed, prestress is applied. After the anchor rod puller is used to apply prestress to the design requirement, a period of time is maintained, and then locking work is performed, that is, the steel plate nut at the root of the anchor head is tightened with a torque wrench, and the tightening torque is tightened. The steel plate, the puller, and the excess anchor head are removed, the hole is closed, and the anchor rod construction is completed.

[0003] The existing anchoring and grouting integrated machine can only realize anchor rod grouting and anchor rod rotation and setting, and needs to be manually tightened with a nut to apply prestress. This method is time-consuming and labor-intensive. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide an anchoring and grouting integrated device and an anchor rod construction equipment, which can improve the installation efficiency of the anchor rod.

[0005] Embodiments of the present application are implemented as follows:

[0006] In one aspect of the embodiments of the present application, an anchoring and grouting integrated device is provided, which includes a mounting frame, a first rotating drive and a second rotating drive arranged on the mounting frame, a first hollow rotating shaft in transmission connection with the first rotating drive, and a second hollow rotating shaft in transmission connection with the second rotating drive. The second hollow rotating shaft is coaxially sleeved on the first hollow rotating shaft. One end of the first hollow rotating shaft is used to connect a grouting device, and the other end is used to connect an anchor rod. The second hollow rotating shaft is used to be connected with a nut on the anchor rod.

[0007] Optionally, as one implementable manner, a linear drive is further arranged on the mounting frame, and the first hollow rotating shaft is axially slid along the extension direction thereof by the linear drive.

[0008] Optionally, as one implementable manner, a slide rail extending along the first hollow rotating shaft is arranged on the mounting frame, a sliding member is slidably arranged on the slide rail, the sliding member is connected with the first hollow rotating shaft, and the sliding member is slid on the slide rail by the linear drive.

[0009] Optionally, as one implementable manner, a first mounting table and a second mounting table are arranged on the mounting frame, the first rotating drive and the first hollow rotating shaft are mounted on the first mounting table, and the second rotating drive and the second hollow rotating shaft are mounted on the second mounting table.

[0010] Optionally, as an implementable manner, the first hollow rotating shaft and the first mounting table are rotationally connected through a first tapered roller bearing, and the second hollow rotating shaft and the second mounting table are rotationally connected through a second tapered roller bearing.

[0011] Optionally, as an implementable manner, the first rotating drive and the first hollow rotating shaft are rotationally connected through a first gear set, and the second rotating drive and the second hollow rotating shaft are rotationally connected through a second gear set.

[0012] Optionally, as an implementable manner, the first gear set comprises a first gear and a second gear in engagement, the first gear is connected with the first rotating drive, and the second gear is connected with the first hollow rotating shaft; and the second gear set comprises a third gear and a fourth gear in engagement, the third gear is connected with the second rotating drive, and the fourth gear is connected with the second hollow rotating shaft.

[0013] Optionally, as an implementable manner, a working end of the second hollow rotating shaft is provided with a clamping interface matched with a nut.

[0014] Optionally, as an implementable manner, the mounting rack is provided at a bottom portion with a connecting piece connected with a construction rack.

[0015] In another aspect of the embodiments of the present application, an anchor rod construction equipment is provided, comprising a grouting device and the anchor-grouting integrated device according to any one of the above.

[0016] The embodiments of the present application have the following beneficial effects:

[0017] The anchor-grouting integrated device and the anchor rod construction equipment provided by the present application comprise a mounting rack, and a first rotating drive and a second rotating drive arranged on the mounting rack, a first hollow rotating shaft in transmission connection with the first rotating drive, and a second hollow rotating shaft in transmission connection with the second rotating drive. The second hollow rotating shaft is coaxially sleeved on the first hollow rotating shaft. This unique coaxial nesting structure design is ingenious, which not only saves space, but also realizes the organic integration of different functional components. One end of the first hollow rotating shaft is used for connecting the grouting device, so that the grout can be smoothly injected into the anchoring section of the anchor rod through the hollow channel, and the other end is used for connecting the anchor rod, which ensures the directness and efficiency of the grouting process; the second hollow rotating shaft is used for clamping with a nut on the anchor rod, and the second hollow rotating shaft clamped with the nut is driven to rotate by the second rotating drive, which can quickly and accurately apply a prestress to the anchor rod. Compared with manual operation, the speed is greatly improved, which greatly shortens the installation time of a single anchor rod, and thus effectively accelerates the construction progress and reduces the risk of construction delay in the overall tunnel construction. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the anchor and injection integrated device provided by the embodiments of the present application is shown in the figure.

[0020] Figure 2 The cross-sectional view of the anchor and injection integrated device provided by the embodiments of the present application is shown in the figure.

[0021] Figure: 100-anchor and injection integrated device; 110-mounting frame; 111-first mounting table; 112-second mounting table; 113-connecting rod; 114-connector; 120-first rotary drive; 121-first gear set; 1211-first gear; 1212-second gear; 130-second rotary drive; 131-second gear set; 1311-third gear; 1312-fourth gear; 140-first hollow rotating shaft; 150-second hollow rotating shaft; 160-linear drive; 170-slideway; 171-sliding member. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Please refer to Figure 1 and Figure 2 The embodiment provides an anchor-grouting integrated device 100, which comprises a mounting frame 110, a first rotary drive 120 and a second rotary drive 130 arranged on the mounting frame 110, a first hollow rotating shaft 140 in transmission connection with the first rotary drive 120, and a second hollow rotating shaft 150 in transmission connection with the second rotary drive 130. The second hollow rotating shaft 150 is coaxially sleeved on the first hollow rotating shaft 140. One end of the first hollow rotating shaft 140 is used for connecting a grouting device, and the other end is used for connecting an anchor rod. The second hollow rotating shaft 150 is used for clamping a nut on the anchor rod.

[0027] Specifically, when the anchor-grouting integrated device 100 of the present application is used, an anchor rod of an appropriate specification is selected, one end of the anchor rod is stably connected to the connecting end of the first hollow rotating shaft 140, and the connection is ensured to be tight to prevent the anchor rod from falling off during subsequent grouting, rotation and other operations. Threaded connection, quick clamping and other methods can be used. A nut matched with the anchor rod is pre-sleeved on the corresponding position of the anchor rod. The specification of the nut should match the clamping structure of the second hollow rotating shaft 150, so as to facilitate subsequent automatic prestress operation. The anchor rod is inserted into a drill hole drilled in a tunnel, and the grouting device is started, so that the grout is injected into the anchor rod anchoring section in the drill hole under the action of pressure through the hollow channel of the first hollow rotating shaft 140. The first rotary drive 120 is started to drive the first hollow rotating shaft 140 and the anchor rod connected thereto to rotate slowly. This promotes the uniform distribution and accelerated setting of the grout. Then the second rotary drive 130 is started to drive the second hollow rotating shaft 150 to rotate. Since the second hollow rotating shaft 150 is clamped with the nut on the anchor rod, as the second hollow rotating shaft 150 rotates, the nut will be gradually tightened along the threads of the anchor rod to apply prestress to the anchor rod. The connecting parts of the anchor-grouting integrated device 100 and the anchor rod are disassembled, the device is moved to the next anchor rod installation position, and a new round of operation is prepared.

[0028] The anchor-grouting integrated device 100 provided in the application comprises a mounting rack 110, a first rotary driving member 120 and a second rotary driving member 130 arranged on the mounting rack 110, a first hollow rotating shaft 140 in transmission connection with the first rotary driving member 120, and a second hollow rotating shaft 150 in transmission connection with the second rotary driving member 130. The second hollow rotating shaft 150 is coaxially sleeved on the first hollow rotating shaft 140, which is a unique coaxial nesting structure design, saves space, and realizes the organic integration of different functional components. One end of the first hollow rotating shaft 140 is used for connecting a grouting device, so that the grout can be smoothly injected into the anchoring section of the anchor rod through the hollow channel, and the other end is used for connecting the anchor rod, which ensures the directness and efficiency of the grouting process; the second hollow rotating shaft 150 is used for clamping with a nut on the anchor rod, and the second hollow rotating shaft 150 clamped with the nut is driven to rotate by the second rotary driving member 130, which can quickly and accurately apply prestress to the anchor rod, greatly improves the speed compared with manual operation, greatly shortens the installation time of a single anchor rod, and thus effectively speeds up the construction progress and reduces the risk of construction delay in the overall tunnel construction.

[0029] In one feasible embodiment of the application, as shown in Figure 1 and Figure 2 The mounting rack 110 is further provided with a linear driving member 160, which drives the first hollow rotating shaft 140 to axially slide along the extension direction thereof.

[0030] Specifically, when the anchor-grouting integrated device 100 of the application is used, the mounting rack 110 is fixed at a suitable position to ensure the stability of the device. Then one end of the first hollow rotating shaft 140 is connected with the grouting device, and the other end is connected with the anchor rod. The second hollow rotating shaft 150 is clamped with the nut on the anchor rod. The grouting device is started, and the grouting is performed on the anchoring section of the anchor rod through the first hollow rotating shaft 140. After the grouting is completed, the first rotary driving member 120 is started to drive the first hollow rotating shaft 140 and the anchor rod connected therewith to slowly rotate, so as to promote the uniform distribution and accelerated condensation of the grout. Then the linear driving member 160 is started to drive the first hollow rotating shaft 140 to move away from the drilling hole, so as to apply a pulling force to the anchor rod connected to the first hollow rotating shaft 140. Then the second rotary driving member 130 is started to drive the second hollow rotating shaft 150 to rotate, drive the nut to be tightened, realize the prestress of the anchor rod, and close the pulling force of the linear driving member 160 to the first hollow rotating shaft 140.

[0031] Further, the mounting frame 110 is provided with a sliding rail 170 extending along the first hollow rotating shaft 140, and a sliding piece 171 is slidingly arranged on the sliding rail 170 and is clamped with the first hollow rotating shaft 140, and the sliding piece 171 is driven to slide on the sliding rail 170 by the linear driving piece 160. The arrangement of the sliding rail 170 and the sliding piece 171 ensures the stability and accuracy of the axial sliding of the first hollow rotating shaft 140, reduces errors, and improves the quality of the anchor rod installation.

[0032] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the mounting frame 110 is provided with a first mounting table 111 and a second mounting table 112, and the first rotating driving piece 120 and the first hollow rotating shaft 140 are mounted on the first mounting table 111, and the second rotating driving piece 130 and the second hollow rotating shaft 150 are mounted on the second mounting table 112.

[0033] Specifically, the first rotating driving piece 120 and the first hollow rotating shaft 140 are drivingly connected on the first mounting table 111 to ensure the stable rotation of the first hollow rotating shaft 140, and the second rotating driving piece 130 and the second hollow rotating shaft 150 are drivingly connected on the second mounting table 112 to ensure the stable rotation of the second hollow rotating shaft 150.

[0034] One end of the first hollow rotating shaft 140 is used to connect the grouting equipment, and the other end is used to connect the anchor rod, so as to ensure that the grouting backflow does not enter the first mounting table 111 or the second mounting table 112, thereby ensuring the driving connection stability of the first rotating driving piece 120 and the first hollow rotating shaft 140, and the driving connection stability of the second rotating driving piece 130 and the second hollow rotating shaft 150.

[0035] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the first hollow rotating shaft 140 and the first mounting table 111 are drivingly connected through a first tapered roller bearing, and the second hollow rotating shaft 150 and the second mounting table 112 are drivingly connected through a second tapered roller bearing.

[0036] Specifically, the use of the first tapered roller bearing and the second tapered roller bearing improves the rotation stability and carrying capacity of the rotating shaft, reduces vibration and wear during operation of the equipment, and prolongs the service life of the equipment.

[0037] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the first rotating driving piece 120 and the first hollow rotating shaft 140 are drivingly connected through a first gear set 121, and the second rotating driving piece 130 and the second hollow rotating shaft 150 are drivingly connected through a second gear set 131.

[0038] Specifically, the use of the first gear set 121 and the second gear set 131 improves the accuracy and efficiency of power transmission, so that the first rotating drive 120 can better control the rotation of the first hollow rotating shaft 140, and so that the second rotating drive 130 can better control the rotation of the second hollow rotating shaft 150, thereby ensuring the normal operation of the device.

[0039] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the first gear set 121 includes a first gear 1211 and a second gear 1212 engaged with each other, the first gear 1211 is connected with the first rotating drive 120, and the second gear 1212 is connected with the first hollow rotating shaft 140. The second gear set 131 includes a third gear 1311 and a fourth gear 1312 engaged with each other, the third gear 1311 is connected with the second rotating drive 130, and the fourth gear 1312 is connected with the second hollow rotating shaft 150.

[0040] Specifically, the rotation of the first rotating drive 120 drives the first gear 1211 to rotate, the rotation of the first gear 1211 drives the second gear 1212 to rotate, and the rotation of the second gear 1212 drives the first hollow rotating shaft 140 to rotate, thereby ensuring the stability of power transmission. The rotation of the second rotating drive 130 drives the third gear 1311 to rotate, the rotation of the third gear 1311 drives the fourth gear 1312 to rotate, and the rotation of the fourth gear 1312 drives the second hollow rotating shaft 150 to rotate, thereby ensuring the stability of power transmission.

[0041] Further, the second gear 1212 and the first hollow rotating shaft 140 are connected through a first spline shaft, and the fourth gear 1312 and the second hollow rotating shaft 150 are connected through a second spline shaft, thereby ensuring the stability of power transmission. At the same time, it is also convenient for dismounting and replacing the first hollow rotating shaft 140 and the second hollow rotating shaft 150, so as to adapt to different specifications of nuts and anchor rods.

[0042] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the working end of the second hollow rotating shaft 150 is provided with a clamping interface matched with the nut.

[0043] Specifically, the clamping interface of the working end of the second hollow rotating shaft 150 can be accurately clamped with the nut on the anchor rod, so as to effectively drive the nut to rotate when the second hollow rotating shaft 150 rotates.

[0044] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the bottom of the mounting frame 110 is provided with a connecting piece 114 connected with the construction rack through the connecting piece 114.

[0045] Specifically, the arrangement of the connecting pieces 114 enables the device to be closely connected with the construction rack, thereby improving the stability and mobility of the device and facilitating the operation at different construction positions.

[0046] In an embodiment of the present application, as shown in Figure 1 and Figure 2 , the first mounting table 111 is arranged on the mounting rack 110, and the second mounting table 112 and the second mounting table 112 are connected through a plurality of connecting rods 113.

[0047] Specifically, the arrangement of the connecting rods 113 enhances the connecting strength and stability between the two mounting tables, ensures the overall structural precision of the device, and improves the operation reliability of the device.

[0048] The embodiment of the present application also discloses an anchor rod construction device, which comprises a grouting device and the anchor-grouting integrated device 100 in the foregoing embodiment. The anchor rod construction device comprises the same structure and beneficial effects as the anchor-grouting integrated device 100 in the foregoing embodiment. The structure and beneficial effects of the anchor-grouting integrated device 100 have been described in detail in the foregoing embodiment, and will not be described here again.

[0049] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anchor-injection integrated device, characterized by, The mounting frame is provided with a first rotating driving element and a second rotating driving element, a first hollow rotating shaft in transmission connection with the first rotating driving element, and a second hollow rotating shaft in transmission connection with the second rotating driving element, the second hollow rotating shaft being coaxially sleeved on the first hollow rotating shaft, one end of the first hollow rotating shaft being used for connecting a grouting device and the other end being used for connecting an anchor rod, and the second hollow rotating shaft being used for clamping a nut on the anchor rod.

2. The anchor-injection integrated device of claim 1, wherein, The mounting frame is further provided with a linear driving element, which drives the first hollow rotating shaft to axially slide along the extension direction of the first hollow rotating shaft.

3. The anchor-injection integrated device of claim 2, wherein, The mounting frame is provided with a slide rail extending along the first hollow rotating shaft, and a sliding element is slidably arranged on the slide rail and clamped with the first hollow rotating shaft, the linear driving element driving the sliding element to slide on the slide rail.

4. The anchor-injection integrated device of claim 1, wherein, The mounting frame is provided with a first mounting table and a second mounting table, the first rotating driving element and the first hollow rotating shaft being mounted on the first mounting table, and the second rotating driving element and the second hollow rotating shaft being mounted on the second mounting table.

5. The anchor-injection integrated device of claim 4, wherein, The first hollow rotating shaft and the first mounting table are rotationally connected through a first tapered roller bearing, and the second hollow rotating shaft and the second mounting table are rotationally connected through a second tapered roller bearing.

6. The anchor-injection integrated device of claim 1, wherein, The first rotating driving element and the first hollow rotating shaft are rotationally connected through a first gear set, and the second rotating driving element and the second hollow rotating shaft are rotationally connected through a second gear set.

7. The anchor-injection integrated device of claim 6, wherein, The first gear set comprises a first gear and a second gear in engagement, the first gear being connected with the first rotating driving element and the second gear being connected with the first hollow rotating shaft, and the second gear set comprises a third gear and a fourth gear in engagement, the third gear being connected with the second rotating driving element and the fourth gear being connected with the second hollow rotating shaft.

8. The anchor-injection integrated device of claim 1, wherein, The working end of the second hollow rotating shaft is provided with a clamping interface matched with the nut.

9. The anchor-injection integrated device of claim 1, wherein, The bottom of the mounting frame is provided with a connecting element connected with a construction rack.

10. A rock bolt installation apparatus characterised in that, The mounting frame is provided with a first rotating driving element and a second rotating driving element, a first hollow rotating shaft in transmission connection with the first rotating driving element, and a second hollow rotating shaft in transmission connection with the second rotating driving element, the second hollow rotating shaft being coaxially sleeved on the first hollow rotating shaft, one end of the first hollow rotating shaft being used for connecting a grouting device and the other end being used for connecting an anchor rod, and the second hollow rotating shaft being used for clamping a nut on the anchor rod. The mounting frame is further provided with a linear driving element, which drives the first hollow rotating shaft to axially slide along the extension direction of the first hollow rotating shaft. The mounting frame is provided with a slide rail extending along the first hollow rotating shaft, and a sliding element is slidably arranged on the slide rail and clamped with the first hollow rotating shaft, the linear driving element driving the sliding element to slide on the slide rail. The mounting frame is provided with a first mounting table and a second mounting table, the first rotating driving element and the first hollow rotating shaft being mounted on the first mounting table, and the second rotating driving element and the second hollow rotating shaft being mounted on the second mounting table. The first hollow rotating shaft and the first mounting table are rotationally connected through a first tapered roller bearing, and the second hollow rotating shaft and the second mounting table are rotationally connected through a second tapered roller bearing. The first rotating driving element and the first hollow rotating shaft are rotationally connected through a first gear set, and the second rotating driving element and the second hollow rotating shaft are rotationally connected through a second gear set. The first gear set comprises a first gear and a second gear in engagement, the first gear being connected with the first rotating driving element and the second gear being connected with the first hollow rotating shaft, and the second gear set comprises a third gear and a fourth gear in engagement, the third gear being connected with the second rotating driving element and the fourth gear being connected with the second hollow rotating shaft. The working end of the second hollow rotating shaft is provided with a clamping interface matched with the nut. The bottom of the mounting frame is provided with a connecting element connected with a construction rack. The mounting frame is provided with a first rotating driving element and a second rotating driving element, a first hollow rotating shaft in transmission connection with the first rotating driving element, and a second hollow rotating shaft in transmission connection with the second rotating driving element, the second hollow rotating shaft being coaxially sleeved on the first hollow rotating shaft, one end of the first hollow rotating shaft being used for connecting a grouting device and the other end being used for connecting an anchor rod, and the second hollow rotating shaft being used for clamping a nut on the anchor rod. The mounting frame is further provided with a linear driving element, which drives the first hollow rotating shaft to axially slide along the extension direction of the first hollow rotating shaft. The mounting frame is provided with a slide rail extending along the first hollow rotating shaft, and a sliding element is slidably arranged on the slide rail and clamped with the first hollow rotating shaft, the linear driving element driving the sliding element to slide on the slide rail. The mounting frame is provided with a first mounting table and a second mounting table, the first rotating driving element and the first hollow rotating shaft being mounted on the first mounting table, and the second rotating driving element and the second hollow rotating shaft being mounted on the second mounting table. The first hollow rotating shaft and the first mounting table are rotationally connected through a first tapered roller bearing, and the second hollow rotating shaft and the second mounting table are rotationally connected through a second tapered roller bearing. The first rotating driving element and the first hollow rotating shaft are rotationally connected through a first gear set, and the second rotating driving element and the second hollow rotating shaft are rotationally connected through a second gear set. The first gear set comprises a first gear and a second gear in engagement, the first gear being connected with the first rotating driving element and the second gear being connected with the first hollow rotating shaft, and the second gear set comprises a third gear and a fourth gear in engagement, the third gear being connected with the second rotating driving element and the fourth gear being connected with the second hollow rotating shaft. The working end of the second hollow rotating shaft is provided with a clamping interface matched with the nut. The bottom of the mounting frame is provided with a connecting element connected with a construction rack. The mounting frame is provided with a first rotating driving element and a second rotating driving element, a first hollow rotating shaft in transmission connection with the first rotating driving element, and a second hollow rotating shaft in transmission connection with the second rotating driving element, the second hollow rotating shaft being coaxially sleeved on the first hollow rotating shaft, one end of the first hollow rotating shaft being used for connecting a grouting device and the other end being used for connecting an anchor rod, and the second hollow rotating shaft being used for clamping a nut on the anchor rod.

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