Lifting point device and anchor cable mounting system

Abstract

The invention belongs to the field of tunnel supporting, and particularly provides a lifting point device and an anchor cable mounting system. The device comprises a main body, a pulley, a retaining mechanism and a locking mechanism are assembled on the main body, the retaining mechanism comprises a retaining tongue, and the retaining tongue can pop out to be clamped on the hole wall of an anchor cable hole. The locking mechanism is used for locking the retaining tongue at the initial position and specifically comprises a pressing cap capable of axially moving relative to the main body, a spring enabling the pressing cap to be kept at the locking position is connected between the main body and the pressing cap, and the front end of the pressing cap can make contact with the bottom of the anchor cable hole to be pressed to the unlocking position. The system comprises the winch and the device. According to the lifting point device, the retaining tongue arranged on the lifting point device can automatically and linearly pop out to clamp the hole wall of the anchor cable hole once being unlocked, the anchor cable hole with a reaming section does not need to be drilled in the actual construction process, as a brand new scheme, the anchor cable installation method that the anchor cable is pulled to enter the anchor cable hole can be achieved, and the anchor cable installation efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of tunnel support, and in particular relates to a lifting point device and an anchor cable installation system. Background Technology

[0002] During tunnel construction, initial support is a crucial step to ensure safe construction. Methods of initial support include bolt support, cable anchor support, and arch support. Among these, cable anchor support, as an active support method, is suitable for fractured surrounding rock, long-span tunnels, and soft rock formations. Specifically, construction involves drilling anchor holes and installing the anchor cables into those holes.

[0003] To address the problem of low installation efficiency of anchor cables, patent application CN109944241A discloses an anchor cable hole bottom reverse traction device. This device includes a base with a fixed pulley and a hook mechanism. The base can be positioned at the bottom of the anchor cable hole. The hook mechanism includes a steel pin and a spring. One end of the steel pin is hinged to the base, and the other end extends outside the base. The fixed pulley allows the traction rope of the traction mechanism to pass over it. One end of the traction rope is connected to the front end of the anchor cable, and the other end is connected to an external power source (human or mechanical).

[0004] During construction, anchor cable holes need to be drilled first, with the end of the holes enlarged. The device is then pushed into the anchor cable hole. During this process, the steel pin is pushed towards the base by the hole wall, compressing the spring. When the device is pushed to the enlarged section at the bottom of the anchor cable hole, the steel pin opens under the spring's action and locks onto the step of the enlarged section, effectively providing a lifting point. In essence, this device can also be called a lifting point device. External power control allows the rope to be pulled from the hole opening to the bottom.

[0005] Although the above-mentioned traction device has a relatively simple structure, in order to ensure that it can be reliably fixed at the bottom of the anchor cable hole, an enlarged section needs to be drilled in the anchor cable hole, which will increase the drilling difficulty of the anchor cable hole. Summary of the Invention

[0006] The purpose of this invention is to provide a lifting point device that employs a novel design to solve the problem of anchor cable installation efficiency without increasing the difficulty of drilling anchor cable holes. A further purpose of this invention is to provide an anchor cable installation system that uses the aforementioned lifting point device to address the problem of low anchor cable installation efficiency.

[0007] To achieve the above objectives, the technical solution of the lifting point device provided by the present invention is as follows: A lifting point device includes a main body, on which a pulley, a backstop mechanism, and a locking mechanism are mounted. The backstop mechanism includes two or more backstop tongues arranged at predetermined angular intervals. The backstop tongues are linearly mounted on the main body. During their travel, the backstop tongues have an inward retraction position and a backstop position that can be engaged in an anchor cable hole. A spring is connected between the main body and the backstop tongues to drive the backstop tongues from the inward retraction position to the backstop position. The locking mechanism includes a pressure cap that can move axially relative to the main body. The pressure cap is connected to a locking hook corresponding to each backstop tongue. The backstop tongues are provided with a hooking part. During the travel of the pressure cap, there is a locking position that engages the locking hook with the hooking part to lock the backstop tongue in the inward retraction position and an unlocking position that disengages the locking hook from the hooking part. A spring is connected between the main body and the pressure cap to keep the pressure cap in the locking position. The front end of the pressure cap can contact the bottom of the anchor cable hole and be pressed to the unlocking position.

[0008] As a further improvement, a guide hole is provided on the main body, and the anti-reverse tongue is assembled in the guide hole. The spring that drives the anti-reverse tongue from the retracted position to the anti-reverse position is a compression spring installed in the guide hole. When the compression spring is released, it can drive the anti-reverse tongue to pop out and get stuck in the anchor cable hole.

[0009] As a further improvement, the anti-reverse tongue has a cutting edge structure at one end used to lock into the anchor cable hole.

[0010] As a further improvement, the hook part is a toothed structure provided on the anti-retracting tongue.

[0011] As a further improvement, a guide sleeve is connected to the main body, and the pressure cap is guided and assembled on the guide sleeve. The main body is provided with a spring mounting hole. The spring that keeps the pressure cap in the locked position is a compression spring installed in the spring mounting hole. The compression spring can push the pressure cap to keep it in the locked position. The pressure cap is provided with an anti-dislodgement protrusion to prevent the pressure cap from falling out of the guide sleeve.

[0012] As a further improvement, the guide sleeve is a spliced ​​structure composed of two or more separate blocks, with each block together forming a sleeve structure that surrounds the pressure cap.

[0013] As a further improvement, the front end of the pressure cap has a tapered tip structure.

[0014] As a further improvement, a groove is provided at the rear end of the main body, the pulley is fitted in the groove, and a rope passage is provided on the side wall of the groove for the traction rope of the winch to pass through.

[0015] As a further improvement, the rope-threading channels are provided in two sets, each set consisting of two radially opposite rope-threading channels.

[0016] The beneficial effects are as follows: This invention provides a novel lifting point device that can be used for anchor cable installation operations. Specifically, the lifting point device includes a main body, which is equipped with three main mechanisms: a pulley, a backstop mechanism, and a locking mechanism. The pulley is used for the traction rope that pulls the anchor cable to pass over. The backstop mechanism is used to fix the lifting point device in the anchor cable hole. The locking mechanism is used to engage the backstop tongue when the lifting point device is pushed into the anchor cable hole to prevent the backstop tongue from being damaged by the pressure of the anchor cable hole wall.

[0017] When installing anchor cables, the traction rope can be passed around the pulley and connected to the front end of the anchor cable. The lifting point device can be pushed into the anchor cable hole manually or using equipment, and the traction rope will then enter the hole. During this process, the anti-reverse tongue is in the anti-reverse position and the pressure cap is in the locked position. Once the lifting point device moves to the bottom of the anchor cable hole, the pressure cap will touch the bottom of the hole and, under the pressure of the bottom of the hole, can move from the locked position to the unlocked position. The anti-reverse tongue can then pop out and firmly lock into the anchor cable hole, thus fixing it in place. Afterward, the traction rope can be wound up to pull the anchor cable into the anchor cable hole.

[0018] In this invention, once the anti-reverse tongue of the lifting point device is unlocked, it can automatically pop out in a straight line and jam the wall of the anchor cable hole. In actual construction, there is no need to drill anchor cable holes with enlarged sections. As a brand-new solution, it can realize the anchor cable installation method of pulling the anchor cable into the anchor cable hole, thereby improving the anchor cable installation efficiency.

[0019] To achieve the above objectives, the technical solution of the anchor cable installation system provided by the present invention is as follows: An anchor cable installation system includes a winch and a lifting point device. The lifting point device includes a main body, on which a pulley, a backstop mechanism, and a locking mechanism are mounted. The backstop mechanism includes two or more backstop tongues arranged at predetermined angular intervals. The backstop tongues are linearly mounted on the main body. During their travel, the backstop tongues have an inward retraction position and a backstop position that can be engaged in the anchor cable hole. A spring is connected between the main body and the backstop tongues to drive the backstop tongues from the inward retraction position to the backstop position. The locking mechanism includes a pressure cap that can move axially relative to the main body. The pressure cap is connected to a locking hook corresponding to each backstop tongue. The backstop tongues are provided with a hooking part. During the travel of the pressure cap, there is a locking position that engages the locking hook with the hooking part to lock the backstop tongue in the inward retraction position and an unlocking position that disengages the locking hook from the hooking part. A spring is connected between the main body and the pressure cap to keep the pressure cap in the locking position. The front end of the pressure cap can contact the bottom of the anchor cable hole and be pressed to the unlocking position. The traction rope of the winch can pass around the pulley of the lifting point device and connect to the front end of the anchor cable.

[0020] As a further improvement, a guide hole is provided on the main body, and the anti-reverse tongue is assembled in the guide hole. The spring that drives the anti-reverse tongue from the retracted position to the anti-reverse position is a compression spring installed in the guide hole. When the compression spring is released, it can drive the anti-reverse tongue to pop out and get stuck in the anchor cable hole.

[0021] As a further improvement, the anti-reverse tongue has a cutting edge structure at one end used to lock into the anchor cable hole.

[0022] As a further improvement, the hook part is a toothed structure provided on the anti-retracting tongue.

[0023] As a further improvement, a guide sleeve is connected to the main body, and the pressure cap is guided and assembled on the guide sleeve. The main body is provided with a spring mounting hole. The spring that keeps the pressure cap in the locked position is a compression spring installed in the spring mounting hole. The compression spring can push the pressure cap to keep it in the locked position. The pressure cap is provided with an anti-dislodgement protrusion to prevent the pressure cap from falling out of the guide sleeve.

[0024] As a further improvement, the guide sleeve is a spliced ​​structure composed of two or more separate blocks, with each block together forming a sleeve structure that surrounds the pressure cap.

[0025] As a further improvement, the front end of the pressure cap has a tapered tip structure.

[0026] As a further improvement, a groove is provided at the rear end of the main body, the pulley is fitted in the groove, and a rope passage is provided on the side wall of the groove for the traction rope of the winch to pass through.

[0027] As a further improvement, the rope-threading channels are provided in two sets, each set consisting of two radially opposite rope-threading channels.

[0028] As a further improvement, the winch is equipped with a torque sensor that monitors the torque of its drum to determine whether the anchor cable is installed in place based on the torque sensor reading.

[0029] The beneficial effects are as follows: The anchor cable installation system provided by the present invention adopts a brand-new lifting point device. Specifically, the lifting point device includes a main body, which is equipped with three main mechanisms: a pulley, a backstop mechanism, and a locking mechanism. The pulley is used for the traction rope that pulls the anchor cable to pass over. The backstop mechanism is used to fix the lifting point device in the anchor cable hole. The locking mechanism is used to engage the backstop tongue when the lifting point device is pushed into the anchor cable hole to prevent the backstop tongue from being damaged by the pressure of the anchor cable hole wall.

[0030] When installing anchor cables, the traction rope can be passed around the pulley and connected to the front end of the anchor cable. The lifting point device can be pushed into the anchor cable hole manually or using equipment, and the traction rope will then enter the hole. During this process, the anti-reverse tongue is in the anti-reverse position and the pressure cap is in the locked position. Once the lifting point device moves to the bottom of the anchor cable hole, the pressure cap will touch the bottom of the hole and, under the pressure of the bottom of the hole, can move from the locked position to the unlocked position. The anti-reverse tongue can then pop out and firmly lock into the anchor cable hole, thus fixing it in place. Afterward, the traction rope can be wound up to pull the anchor cable into the anchor cable hole.

[0031] In this invention, once the anti-reverse tongue of the lifting point device is unlocked, it can automatically pop out in a straight line and jam the wall of the anchor cable hole. In actual construction, there is no need to drill anchor cable holes with enlarged sections. As a brand-new solution, it can realize the anchor cable installation method of pulling the anchor cable into the anchor cable hole, thereby improving the anchor cable installation efficiency. Attached Figure Description

[0032] Figure 1 A schematic diagram of the structure of the anchor cable installation device provided with an embodiment of the anchor cable installation system in this invention; Figure 2 A schematic diagram of the anchor cable installation device provided with an embodiment of the anchor cable installation system in this invention from another perspective; Figure 3 This is a schematic diagram from a first-person perspective during the construction of the anchor cable installation system implementation method of the present invention (the lifting point device has entered the hole). Figure 4 This is a schematic diagram from a second perspective during the construction of the anchor cable installation system implementation method of the present invention (the lifting point device has entered the hole). Figure 5 This is a third-person perspective diagram of the construction of the anchor cable installation system implementation method of the present invention (the lifting point device has entered the hole). Figure 6 This is a cross-sectional view of an embodiment of the lifting point device in this invention, showing a state corresponding to the process of inserting the anchor cable into the hole; Figure 7 This is a cross-sectional view of an embodiment of the lifting point device in this invention, showing the state after the lifting point device has been installed in place; Figure 8 This is a cross-sectional view of an embodiment of the lifting point device in this invention, showing the state corresponding to the process of the drill rod exiting the anchor cable hole and pulling the anchor cable; Figure 9 This is a cross-sectional view of an embodiment of the lifting point device in this invention, showing a state corresponding to the anchor cable being about to be installed in place; Figure 10 This is a first-view perspective view of an embodiment of the lifting point device in this invention; Figure 11 This is a perspective view of a second-angle embodiment of the suspension point device in this invention.

[0033] Explanation of reference numerals in the attached figures: 1. Boom; 2. Propulsion beam; 3. Power head; 4. Winch; 5. Cutting machine; 6. Suspended basket; 7. Traction rope; 8. Drill rod; 9. Cable feeding mechanism; 10. Lifting point device; 100. Anchor cable; 200. Anchor cable hole; 901. Cable feeding wheel assembly; 902. Guide wheel assembly; 1001. Pulley; 1002. Groove; 1003. Main body; 1004. Anti-reverse tongue; 1005. First compression spring; 1006. Locking hook; 1007. Pressure cap; 1008. Rope threading channel; 1009. Guide sleeve; 1010. Second compression spring. Detailed Implementation

[0034] Anchor cable support is an active support technology that uses prestressed anchor cables combined with grouting to transfer stress from the surrounding rock to deep, stable rock strata. Construction involves drilling anchor cable holes and installing the anchor cables into those holes. In some cases, the anchor cables used are large-diameter or irregularly shaped anchor cables formed by winding multiple strands, and are quite long, posing challenges for mechanized installation.

[0035] The method of using a traction rope to pull the front end of the anchor cable into the anchor cable hole can improve the efficiency of anchor cable installation. To implement this method, a lifting point device needs to be installed in the anchor cable hole to provide a fulcrum for the traction rope to pull the anchor cable. The basic technical concept of this invention is to configure a pop-out anti-reverse tongue on the lifting point device that can be locked onto the wall of the anchor cable hole, and to configure an unlockable locking mechanism on the anti-reverse tongue. After the lifting point device is sent to the bottom of the anchor cable hole, the locking mechanism unlocks, and the anti-reverse tongue pops out and locks onto the hole wall, forming a reliable and stable fixing structure.

[0036] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0037] Specific embodiments of the anchor cable installation system provided by the present invention: The anchor cable installation system provided in this embodiment includes a lifting point device 10 and a winch 4 that can pull the anchor cable 100 into the anchor cable hole 200. The winch 4, as those skilled in the art will understand, includes a drum and a traction rope 7, such as a wire rope or chain, wound on the drum. The traction rope 7 can be wound up and down as the drum rotates forward and backward.

[0038] In some embodiments, such as Figures 1-5 As shown, the winch 4 can be integrated on the drill arm, that is, on the mechanical arm equipped with the drill. The drill can drill the anchor cable hole 200. At the same time, the drill rod 8 of the drill can be used to push the lifting point device 10 into the anchor cable hole 200, forming a "one machine for multiple uses".

[0039] Specifically, the drill arm includes a boom 1, on which a feed beam 2 is mounted. Those skilled in the art will understand that the drill rig includes a power head 3 and drill rods 8. The power head 3 outputs torque to rotate the drill rods 8, which can be connected to drill holes of the required depth. A feed seat, movable along the feed beam 2, is mounted on the feed beam 2. The power head 3 is mounted on the feed seat and moves with it. The most basic function of the drill rig is to drill anchor holes 200 for installing anchor cables 100.

[0040] like Figures 6-11 As shown, the lifting point device 10 includes a main body 1003, which is the main component of the lifting point device 10, and can also be understood as the base for installing various components. A pulley 1001 is mounted on the main body 1003. Specifically, a pulley 1001 is mounted at the rear end of the main body 1003. The pulley 1001 can be passed around by the traction rope 7 of the winch 4, forming a fixed pulley mechanism during construction.

[0041] To secure the lifting point device 10 within the anchor cable hole 200, a backstop mechanism is also installed on the main body 1003. This backstop mechanism includes a backstop tongue 1004. The function of the backstop tongue 1004 is to engage with the wall of the anchor cable hole 200 after the lifting point device 10 is installed, preventing the lifting point device 10 from retracting when the winch 4 retracts the rope. Essentially, there should be two backstop tongues 1004, ideally spaced apart along the outer periphery of the main body 1003. Of course, three, four, or even more backstop tongues 1004 can also be provided; ideally, they should be evenly distributed circumferentially.

[0042] The anti-reverse tongue 1004 is linearly movable and mounted on the main body 1003, forming a linearly movable anti-reverse tongue 1004. During the movement stroke of the anti-reverse tongue 1004, it has an inward position and an anti-reverse position. The anti-reverse position refers to the position where the anti-reverse tongue 1004 pops outward and is stuck in the hole wall of the anchor cable hole 200. The inward position refers to the initial position of the anti-reverse tongue 1004. Compared with the anti-reverse position, the position of the anti-reverse tongue 1004 is further inward.

[0043] When the lifting device 10 is pushed into the anchor cable hole 200, the anti-reverse tongue 1004 should be in the anti-reverse position. Once the lifting device 10 enters the bottom of the anchor cable hole 200, the anti-reverse tongue 1004 should be able to pop out and move from the retracted position to the anti-reverse position. Specifically, a spring is connected between the anti-reverse tongue 1004 and the main body 1003 so that the anti-reverse tongue 1004 is driven by the spring to eject from the retracted position to the anti-reverse position.

[0044] In a preferred embodiment, a compression spring can be used to propel the anti-retracting tongue 1004 from the retracted position to the anti-retracting position. For ease of description, the compression spring here can be defined as a first compression spring 1005. A guide hole is provided on the main body 1003, and the anti-retracting tongue 1004 is assembled in the guide hole. Specifically, the axis of the guide hole and the axis of the main body 1003 have a certain angle. The first compression spring 1005 is installed in the guide hole. When the anti-retracting tongue 1004 is in the retracted position, the first compression spring 1005 is compressed and stores energy. When the first compression spring 1005 is released, it can propel the anti-retracting tongue 1004 out and lock it in the anchor cable hole 200.

[0045] Of course, in actual implementation, the spring that drives the anti-retracting tongue 1004 to pop out from the retracted position can also be a tension spring. For example, the anti-retracting tongue 1004 can be set as a cylindrical structure, and a tension spring can be installed on the anti-retracting tongue 1004. One end of the tension spring is connected to the anti-retracting tongue 1004, and the other end is connected to the main body 1003 (e.g., the guide hole). When the anti-retracting tongue 1004 is in the retracted position, the tension spring is stretched and stores energy. After release, it can drive the anti-retracting tongue 1004 to pop out.

[0046] A locking mechanism is also provided on the main body 1003. It can be understood that during the process of sending the lifting point device 10 into the anchor cable hole 200, the anti-reverse tongue 1004 should be in the retracted position. The function of the locking mechanism is to lock the anti-reverse tongue 1004 in the retracted position and unlock it when the lifting point device 10 is sent to the bottom of the anchor cable hole 200, so that the anti-reverse tongue 1004 can be released.

[0047] The unlocking mechanism includes a pressure cap 1007, which is axially movable relative to the main body 1003. The pressure cap 1007 is connected to a locking hook 1006, the number of which matches the number of the anti-reverse tongues 1004, and they correspond one-to-one. The function of the locking hooks 1006 is to hook and lock the anti-reverse tongues 1004 in the retracted position. Correspondingly, the anti-reverse tongues 1004 are provided with a hook-and-engagement part.

[0048] The function of the pressure cap 1007 is to drive the locking hook 1006 to unlock it. Specifically, the pressure cap 1007 has a locking position and an unlocking position during its travel. In the locking position, the locking hook 1006 engages with the hook part, locking the anti-reverse tongue 1004 in the retracted position. In the unlocking position, the locking hook 1006 disengages from the hook part.

[0049] During the process of pushing the lifting point device 10 into the anchor cable hole 200, the pressure cap 1007 should remain in the locked position. Specifically, a spring is connected between the main body 1003 and the pressure cap 1007. The spring keeps the pressure cap 1007 in the locked position, and the front end of the pressure cap 1007 can contact the bottom of the anchor cable hole 200 and be pressed into the unlocked position. Specifically, the locking hook 1006 is hinged to the pressure cap 1007 so that when the pressure cap 1007 moves axially, it can drive the locking hook 1006 to form a combined motion of upward movement and swinging around the hinge point, thereby completing the unlocking.

[0050] In a preferred embodiment, such as Figures 6-9 As shown, a guide sleeve 1009 is connected to the main body 1003, and the pressure cap 1007 is guided and assembled on the guide sleeve 1009. A spring mounting hole is provided on the main body 1003. The spring that keeps the pressure cap 1007 in the locked position is a compression spring installed in the spring mounting hole. For ease of description, this compression spring can be defined as the second compression spring 1010. The second compression spring 1010 can push the pressure cap 1007 to be held in the locked position. Of course, the pressure cap 1007 cannot be dislodged from the guide sleeve 1009. For this purpose, an anti-dislodgement boss is provided on the pressure cap 1007. Specifically, the anti-dislodgement boss can be an annular boss or multiple block-shaped bosses spaced apart on the outer periphery of the pressure cap 1007.

[0051] by Figure 6 For example, once the pressure cap 1007 touches the bottom of the anchor cable hole 200, as the drill rod 8 continues to advance, the front end of the pressure cap 1007 is squeezed by the bottom of the hole and moves backward (lower in the figure). The second pressure spring 1010 is compressed, which in turn drives the locking hook 1006 to unlock, and the anti-reverse tongue 1004 pops outward, fixing the lifting point device 10 to the bottom of the anchor cable hole 200.

[0052] It should be noted that in some other embodiments, the spring that keeps the pressure cap 1007 in the locked position can also be a tension spring. For example, the tension spring can be sleeved on the outside of the pressure cap 1007, with one end connected to the pressure cap 1007 and the other end connected to the main body 1003. In the initial state, the tension spring can elastically support the pressure cap 1007 to remain in the locked position. After the pressure cap 1007 touches the bottom of the anchor cable hole 200, the tension spring is stretched, and the pressure cap 1007 moves to the locked position.

[0053] In some preferred embodiments, to facilitate the installation of the pressure cap 1007 and the guide sleeve 1009, the guide sleeve 1009 can be configured as a split-type structure. For example, the guide sleeve 1009 includes two split blocks that can be interlocked to form a sleeve structure that surrounds the pressure cap 1007. Alternatively, the guide sleeve 1009 may also include three split blocks that are sequentially spliced ​​together to form the sleeve structure. Or, the guide sleeve 1009 may also include four split blocks that are sequentially spliced ​​together to form the sleeve structure.

[0054] It should be noted that in some alternative embodiments, the guide sleeve 1009 can also be an integral structure. In this case, the pressure cap 1007 can be configured as an axially split structure. For example, the anti-detachment boss and the main part of the pressure cap 1007 can be set separately. After the pressure cap 1007 is inserted into the guide sleeve 1009, the anti-detachment boss is then connected.

[0055] In addition, regardless of the method used, the guide sleeve 1009 can be installed with the pressure cap 1007 first, and then the guide sleeve 1009 can be connected to the main body 1003, for example, by welding it to the main body 1003.

[0056] In some preferred embodiments, such as Figures 6-11 As shown, a cutting edge structure is provided at one end of the anti-reverse tongue 1004 that is used to lock into the anchor cable hole 200. When the anti-reverse tongue 1004 pops out, the cutting edge structure can partially enter the anchor cable hole 200 to form a more reliable fixed anti-reverse structure.

[0057] In some preferred embodiments, the hook portion provided on the anti-lock tongue 1004 is a toothed structure provided on the anti-lock tongue 1004, and the locking hook 1006 can hook onto the toothed structure to form a lock. Compared with configuring the hook portion as a groove 1002 (hook-groove fit) on the anti-lock tongue 1004, the toothed structure does not form a weak point that weakens the strength of the anti-lock tongue 1004, thus ensuring that the anti-lock tongue 1004 has high strength.

[0058] In some preferred embodiments, such as Figure 11 As shown, the front end of the pressure cap 1007 is provided with a tapered tip structure. Preferably, the tapered tip is a conical tip, but the use of a pyramidal tip is also possible. When the lifting point device 10 is pushed forward, the tapered tip structure can reduce resistance and has a certain piercing effect, which can reduce the installation difficulty of the lifting point device 10.

[0059] In some preferred embodiments, the lifting point device 10 has a groove 1002 at the rear end of its main body 1003, and the pulley 1001 is fitted into the groove 1002, such as... Figures 6-11 As shown, a rope passage 1008 is provided on the side wall of the groove 1002. The rope passage 1008 can be a through groove or a through hole opened in the side wall of the groove 1002, through which the traction rope 7 passes. Thus, during actual construction, when the drill rod 8 pushes the lifting point device 10 into the anchor cable hole 200, the end of the drill rod 8 will not directly abut against the pulley 1001. (Refer to...) Figure 6 The groove 1002 serves to protect the pulley 1001. At the same time, the rope-threading channel 1008 allows personnel to easily observe the threading process when threading the traction rope 7.

[0060] More preferably, the rope-threading channels 1008 are arranged in pairs, with the two rope-threading channels 1008 in each pair radially opposite each other about the main body 1003. First, when the traction rope 7 is threaded into one rope-threading channel 1008, the personnel can directly observe the threading process from the opposite rope-threading channel 1008, which is convenient for threading the rope. Second, since there are two sets of rope-threading channels 1008, even if the pulley 1001 is misaligned, making it inconvenient to thread the rope through one set of rope-threading channels 1008, the threading position can be adjusted so that the traction rope 7 can be threaded into the other set of rope-threading channels 1008.

[0061] In some preferred embodiments, the winch 4 is equipped with a torque sensor to monitor the torque of its drum. When the anchor cable 100 is being installed, the torque sensor reading remains generally stable as the anchor cable 100 moves within the anchor cable hole 200. A sudden spike in the reading indicates that the front end of the anchor cable 100 has reached the bottom of the anchor cable hole 200. Therefore, the sensor reading can be used to determine whether the anchor cable 100 is properly installed. This also protects the winch 4 by preventing continuous pulling on the anchor cable 100.

[0062] For this method of integrating the winch 4 onto the drill arm, preferably, a cable feeding mechanism 9 can also be provided on the drill arm. Specifically, the cable feeding mechanism 9 includes a cable feeding wheel set 901, which includes two pairs of cable feeding wheels with a gap between them to clamp the anchor cable 100. One of the cable feeding wheels is equipped with a driver, forming an active cable feeding wheel that can rotate on its own, while the other cable feeding wheel rotates passively. When installing the anchor cable 100, the active cable feeding wheel rotates, and the tangential frictional force with the anchor cable 100 is converted into a thrust that pushes the anchor cable 100 into the anchor cable hole 200. The two cable feeding wheels rotate towards each other.

[0063] The cable feeding mechanism 9 also includes a guide wheel assembly 902, which works in conjunction with the cable feeding wheel assembly 901 to restrict the movement and orientation of the anchor cable 100 during installation. The guide wheel assembly 902 includes two guide wheels with a gap between them, which are also used to clamp the anchor cable 100, and the axis of the guide wheels is perpendicular to the axis of the cable feeding wheel.

[0064] In other words, the swing (torsional) direction of the anchor cable 100 restricted by the guide wheel assembly 902 is different from the swing (torsional) direction of the anchor cable 100 restricted by the cable feeding wheel assembly 901. For example, as shown in the figure, the axis of the cable feeding wheel assembly 901 is parallel to the upper surface of the propulsion beam 2, and the axis of the guide wheel assembly 902 is perpendicular to the upper surface of the propulsion beam 2. In this way, the cable feeding wheel assembly 901 restricts the anchor cable 100 from swinging up and down, and the guide wheel assembly 902 restricts the anchor cable 100 from swinging left and right, thus jointly constraining the posture of the anchor cable 100 during the installation process.

[0065] In some embodiments, a suspended platform 6 may also be integrated onto the drill arm, allowing personnel to perform construction work within the suspended platform 6.

[0066] In some embodiments, a cutting machine 5 may also be integrated on the drill arm. After the anchor cable 100 is installed in place, the cutting machine 5 can cut the traction rope 7. The cutting machine 5 is existing technology, and for example, an angle grinder may be used.

[0067] In summary, in this invention, once the anti-reverse tongue 1004 configured in the lifting point device 10 is unlocked, it can automatically pop out in a straight line and block the wall of the anchor cable hole 200. In actual construction, there is no need to drill anchor cable holes with enlarged sections. As a brand-new solution, it can realize the anchor cable installation method of pulling the anchor cable into the anchor cable hole and improve the anchor cable installation efficiency.

[0068] Specific embodiments of the lifting point device provided by the present invention: The implementation method of the lifting point device is the same as that described in the implementation method of the anchor cable installation system above, and will not be described in detail here.

[0069] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting point device, characterized in that, The device includes a main body, on which are mounted pulleys, a backstop mechanism, and a locking mechanism. The backstop mechanism includes two or more backstop tongues arranged at set angular intervals. The backstop tongues are directly mounted on the main body. During their movement, the backstop tongues have an inward retraction position and a backstop position that can be locked in the anchor cable hole. A spring is connected between the main body and the backstop tongues to drive the backstop tongues from the inward retraction position to the backstop position. The locking mechanism includes a pressure cap that can move axially relative to the main body. The pressure cap is connected to a locking hook corresponding to each backstop tongue. The backstop tongues are provided with a hooking part. During the movement of the pressure cap, there is a locking position that engages the locking hook with the hooking part to lock the backstop tongue in the inward retraction position and an unlocking position that disengages the locking hook from the hooking part. A spring is connected between the main body and the pressure cap to keep the pressure cap in the locking position. The front end of the pressure cap can contact the bottom of the anchor cable hole and be pressed to the unlocking position.

2. The lifting point device according to claim 1, characterized in that, The main body is provided with a guide hole, and the anti-reverse tongue is assembled in the guide hole. The spring that drives the anti-reverse tongue from the retracted position to the anti-reverse position is a compression spring installed in the guide hole. When the compression spring is released, it can drive the anti-reverse tongue to pop out and get stuck in the anchor cable hole.

3. The lifting point device according to claim 1 or 2, characterized in that, The anti-reverse tongue is designed to engage with the anchor cable hole at one end and has a cutting edge.

4. The lifting point device according to claim 1 or 2, characterized in that, The hook part is a toothed structure located on the anti-retracting tongue.

5. The lifting point device according to claim 1 or 2, characterized in that, The main body is connected to a guide sleeve, and the pressure cap is guided and assembled on the guide sleeve. The main body is provided with a spring mounting hole. The spring that keeps the pressure cap in the locked position is a compression spring installed in the spring mounting hole. The compression spring can push the pressure cap to keep it in the locked position. The pressure cap is provided with an anti-detachment protrusion to prevent the pressure cap from falling out of the guide sleeve.

6. The lifting point device according to claim 5, characterized in that, The guide sleeve is a spliced ​​structure composed of two or more separate blocks, which together form a sleeve structure that surrounds the pressure cap.

7. The lifting point device according to claim 1 or 2, characterized in that, The front end of the pressure cap has a tapered tip structure.

8. The lifting point device according to claim 1 or 2, characterized in that, The main body has a groove at the rear end, in which the pulley is fitted. A rope passage is provided on the side wall of the groove for the winch's traction rope to pass through.

9. The lifting point device according to claim 8, characterized in that, There are two sets of rope-threading channels, each set consisting of two radially opposite rope-threading channels.

10. Anchor cable installation system, including a winch and lifting point device, characterized in that, The lifting point device is the lifting point device according to any one of claims 1-9, and the traction rope of the winch can pass around the pulley of the lifting point device and connect to the front end of the anchor cable.

11. The anchor cable installation system according to claim 10, characterized in that, The winch is equipped with a torque sensor that monitors the torque of its drum to determine whether the anchor cable is installed in place.

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