Anchor cable contractible anchorage device for supporting soft rock roadway

Abstract

The utility model relates to the technical field of retractable anchorage devices, in particular to an anchor cable retractable anchorage device for supporting a soft rock roadway. An anchor cable retractable anchorage device for soft rock roadway supporting comprises an equipment sleeve, a telescopic rod is slidably connected into the equipment sleeve, a double-shaft motor is fixedly connected to the telescopic rod, a first threaded rod is fixedly connected to an output shaft at one end of the double-shaft motor, an anchor head is fixedly connected to one end of the telescopic rod, and a second threaded rod is fixedly connected to an output shaft at the other end of the telescopic rod. An inner threaded block is slidably connected into the anchor head, and the first threaded rod penetrates through the inner threaded block and is in threaded connection with the inner threaded block. When the device is plugged into a proper position in a roadway hole, the supporting arms can be automatically unfolded to be fixed to the inner wall of the hole, an anchorage device is prevented from falling out of the hole, the anti-sliding capacity of the device is improved, meanwhile, the supporting blades on the device can be unfolded at the same time, the contact area between the anchorage device and concrete grout is increased, and the service life of the anchorage device is prolonged. And the anchorage device can be more firmly fixed in a roadway hole through concrete grout.

Description

Technical Field

[0001] The utility model relates to the technical field of retractable anchors, in particular to a retractable anchor for supporting soft rock tunnels. Background Art

[0002] The core purpose of soft rock tunnel support is to control the deformation of the surrounding rock and maintain the stability of the tunnel by improving the support structure and enhancing the self-bearing capacity of the surrounding rock. The traditional method of simply increasing the support stiffness is often difficult to work. It is necessary to adopt a method that combines pressure relief, reinforcement and support, and comprehensively consider the deformation and strength of the surrounding rock for comprehensive management. The retractable anchor used for soft rock tunnel support is a tool specially designed for soft rock tunnel support. Its main function is to adapt to the deformation of the surrounding rock through retractable design, thereby providing more effective support effect, being able to release part of the stress when the surrounding rock deforms, and ensuring the safety and stability of the support structure.

[0003] At present, the existing retractable anchors are directly inserted into the drilled tunnel holes, and then concrete slurry is injected into the soft rock to combine with it to form a suspended composite beam. However, the anchors rely solely on the adhesion of concrete slurry and soft rock to achieve fixation. The contact surface between the anchors themselves and the soil is limited, the connection is not tight enough, and the anchors cannot firmly grasp the soft rock, and their anti-slip ability is extremely limited.

[0004] Therefore, there is an urgent need to provide a technical solution to the above-mentioned deficiencies in the existing technology. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a retractable anchor for supporting soft rock tunnels.

[0006] The utility model provides a retractable anchor for supporting soft rock tunnels, which is realized by the following technical solutions:

[0007] A retractable anchor for supporting soft rock tunnels, comprising an equipment casing, a telescopic rod slidably connected inside the equipment casing, a dual-axis motor fixedly connected to the telescopic rod, a first threaded rod fixedly connected to an output shaft at one end of the dual-axis motor, an anchor head fixedly connected to one end of the telescopic rod, an internal threaded block slidably connected inside the anchor head, the first threaded rod penetrates the internal threaded block and is threadedly connected to the internal threaded block, a fixed block fixedly connected inside the anchor head, four support arms hinged on the fixed block, the internal threaded block is connected to the four support arms, a rotating rod is fixedly connected to the output shaft at the other end of the dual-axis motor, six support blades are rotatably connected inside the telescopic rod, and the rotating rod is connected to multiple support blades.

[0008] As a further improvement of the above solution, four connecting rods are hinged on the internal thread block, and the four connecting rods are hinged to the corresponding support arms.

[0009] As a further improvement of the above solution, one end of the telescopic rod is fixedly connected to a second threaded rod, and the second threaded rod passes through one end of the equipment sleeve and is threadedly connected to the equipment sleeve.

[0010] As a further improvement of the above solution, three gears are fixedly connected to the rotating rod, and gear teeth are provided on the six supporting blades. The three gears are meshed with the corresponding gear teeth.

[0011] As a further improvement of the above solution, a slurry stop plug is installed at one end of the equipment casing, one end of the slurry stop plug is fixedly connected to a pad, and the second threaded rod passes through the slurry stop plug and the pad and is threadedly connected to the slurry stop plug and the pad.

[0012] As a further improvement of the above solution, the other end of the anchor head is fixedly connected to a drill tip.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model cooperates with the structures such as the equipment casing, the dual-axis motor, the supporting blades, the first threaded rod and the internal threaded block so that when the equipment is inserted into the appropriate position in the tunnel hole, the supporting arm can be automatically unfolded to form a fixation with the inner wall of the hole, preventing the anchor from falling out of the hole, thereby improving the anti-slip ability of the equipment. At the same time, the multiple supporting blades on the equipment will also be unfolded at the same time, increasing the contact area between the anchor and the concrete slurry, so that the concrete slurry can more firmly fix the anchor in the tunnel hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the retractable anchor for supporting soft rock tunnels of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the equipment casing, telescopic rod, second threaded rod, slurry stopper and pad of the retractable anchor for supporting soft rock tunnels of the utility model;

[0017] Figure 3 This is a schematic diagram of the first split structure of the retractable anchor for supporting soft rock tunnels of the utility model;

[0018] Figure 4 This is a schematic diagram of the second split structure of the retractable anchor for supporting soft rock tunnels of the utility model;

[0019] Figure 5 This is a schematic diagram of the third split structure of the retractable anchor for supporting soft rock tunnels of the utility model.

[0020] In the figure: 1. Equipment casing; 2. Telescopic rod; 3. Dual-axis motor; 4. Rotating rod; 5. Gear; 6. Support blade; 7. Gear teeth; 8. First threaded rod; 9. Fixed block; 10. Internal threaded block; 11. Support arm; 12. Connecting rod; 13. Anchor head; 14. Drill tip; 15. Second threaded rod; 16. Slurry stopper; 17. Pad. DETAILED DESCRIPTION

[0021] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Based on the embodiments in the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art should fall within the scope of protection of the embodiments of the present utility model.

[0022] Example

[0023] Please combine Figures 1 to 5 A retractable anchor for supporting soft rock tunnels includes an equipment casing 1, a telescopic rod 2 is slidably connected inside the equipment casing 1, a dual-axis motor 3 is fixedly connected to the telescopic rod 2, a first threaded rod 8 is fixedly connected to the output shaft at one end of the dual-axis motor 3, an anchor head 13 is fixedly connected to one end of the telescopic rod 2, an internal threaded block 10 is slidably connected inside the anchor head 13, the first threaded rod 8 passes through the internal threaded block 10 and is threadedly connected to the internal threaded block 10, a fixed block 9 is fixedly connected inside the anchor head 13, four support arms 11 are hinged on the fixed block 9, the internal threaded block 10 is connected to the four support arms 11, a rotating rod 4 is fixedly connected to the output shaft at the other end of the dual-axis motor 3, six support blades 6 are rotatably connected inside the telescopic rod 2, and the rotating rod 4 is connected to multiple support blades 6.

[0024] Through the above technical solution, the device can automatically unfold the four support arms 11 and fix them to the inner wall of the hole when it is inserted into the appropriate position in the tunnel hole, preventing the anchor from falling out of the hole. At the same time, the six support blades 6 on the device will also unfold at the same time to increase the contact area between the anchor and the concrete slurry.

[0025] Four connecting rods 12 are hinged on the internal thread block 10 , and the four connecting rods 12 are hinged to corresponding support arms 11 .

[0026] Through the above technical solution, the four connecting rods 12 enable the internal thread block 10 to move and drive the four support arms 11 to expand and support.

[0027] One end of the telescopic rod 2 is fixedly connected to a second threaded rod 15 , which passes through one end of the equipment sleeve 1 and is threadedly connected to the equipment sleeve 1 , and the second threaded rod 15 is externally connected to a rotating device.

[0028] Through the above technical solution, the second threaded rod 15 is rotated to push the telescopic rod 2 to move and retract.

[0029] Three gears 5 are fixedly connected to the rotating rod 4 , and gear teeth 7 are provided on the six supporting blades 6 . The three gears 5 are meshed with the corresponding gear teeth 7 .

[0030] Through the above technical solution, the three gears 5 are meshed with the corresponding gear teeth 7, so that the rotation of the rotating rod 4 can drive the six supporting blades 6 to rotate.

[0031] A slurry stop plug 16 is installed at one end of the equipment casing 1 , and a backing plate 17 is fixedly connected to one end of the slurry stop plug 16 . The second threaded rod 15 passes through the slurry stop plug 16 and the backing plate 17 and is threadedly connected to the slurry stop plug 16 and the backing plate 17 .

[0032] Through the above technical solution, the slurry stopper 16 and the backing plate 17 can seal the hole to prevent the concrete slurry from flowing out of the hole.

[0033] The other end of the anchor head 13 is fixedly connected to a drill tip 14 .

[0034] Through the above technical solution, the drill tip 14 enables the anchor to be inserted into the hole more smoothly.

[0035] The implementation principle of a retractable anchor for supporting soft rock tunnels in the embodiment of the present application is as follows:

[0036] When in use, the operator first drills a hole in the soft rock tunnel, puts the anchor as a whole into the hole, rotates the second threaded rod 15, and the second threaded rod 15 rotates to push the telescopic rod 2 to move forward. The telescopic rod 2 moves forward and drives the anchor head 13 to move forward to the appropriate position, then starts the dual-axis motor 3, and the output shafts at both ends of the dual-axis motor 3 rotate to drive the rotating rod 4 and the first threaded rod 8 to rotate at the same time, the first threaded rod 8 rotates to drive the internal threaded block 10 to move, and the internal threaded block 10 moves to drive the four connecting rods 12 to move, and the four connecting rods 12 move to push the four supporting arms 11 to flip and expand to support the inner wall of the hole to prevent the anchor from slipping out of the hole, the rotating rod 4 rotates to drive the three gears 5 to rotate, and the three gears 5 rotate to drive the six supporting blades 6 to rotate and expand to increase the contact area with the concrete slurry, and then the operator injects concrete slurry into the hole. After grouting is completed, the slurry stopper 16 and the pad 17 are installed through the second threaded rod 15 to seal the hole, and the anchoring operation is completed.

[0037] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principle of the above-mentioned utility model. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0038] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments or applied directly or indirectly without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A retractable anchor for supporting soft rock tunnels, characterized in that: It includes an equipment casing, a telescopic rod is slidably connected to the equipment casing, a dual-axis motor is fixedly connected to the telescopic rod, a first threaded rod is fixedly connected to the output shaft at one end of the dual-axis motor, an anchor head is fixedly connected to one end of the telescopic rod, an internal threaded block is slidably connected to the anchor head, the first threaded rod passes through the internal threaded block and is threadedly connected to the internal threaded block, a fixed block is fixedly connected to the anchor head, four support arms are hinged on the fixed block, the internal threaded block is connected to the four support arms, a rotating rod is fixedly connected to the output shaft at the other end of the dual-axis motor, six support blades are rotatably connected to the telescopic rod, and the rotating rod is connected to multiple support blades.

2. The retractable anchor for supporting soft rock tunnels according to claim 1 is characterized in that: Four connecting rods are hinged on the internal thread block, and the four connecting rods are hinged to corresponding support arms.

3. The retractable anchor for supporting soft rock tunnels according to claim 1, characterized in that: One end of the telescopic rod is fixedly connected to a second threaded rod, and the second threaded rod passes through one end of the equipment sleeve and is threadedly connected to the equipment sleeve.

4. The retractable anchor for supporting soft rock tunnels according to claim 1, characterized in that: Three gears are fixedly connected to the rotating rod, and the six supporting blades are each provided with gear teeth, and the three gears are all meshed with the corresponding gear teeth.

5. The retractable anchor for supporting soft rock tunnels according to claim 3, characterized in that: A slurry stop plug is installed at one end of the equipment casing, and one end of the slurry stop plug is fixedly connected to a pad. The second threaded rod passes through the slurry stop plug and the pad and is threadedly connected to the slurry stop plug and the pad.

6. The retractable anchor for supporting soft rock tunnels according to claim 1, characterized in that: The other end of the anchor head is fixedly connected with a drill tip.

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