Automatic drilling conversion sleeve

Abstract

The utility model discloses an automatic drilling conversion sleeve which comprises a hexagonal cavity, a threaded connector, a centrifugal locking mechanism and an inclined hole, the centrifugal locking mechanism and the inclined hole are arranged between the hexagonal cavity and the threaded connector, and the hexagonal cavity is used for being connected with a hexagonal nut of a double-channel hollow self-drilling anchor rod; the threaded connector is used for being connected with a drilling machine output shaft. The centrifugal locking mechanism is used for locking and loosening a drawing ring of the double-channel hollow self-drilling anchor rod. By the adoption of the automatic drilling conversion sleeve, switching of the locking state and the loosening state of the locking mechanism can be achieved only through the forward rotation function and the reverse rotation function of an onboard jumbolter, power is provided by retreating of the jumbolter, and the steel wire is pulled and resin anchoring agents are pushed out by pulling the drawing ring of the double-channel hollow self-drilling anchor rod through the locking mechanism. Under the condition that the double-channel hollow self-drilling anchor rod is used, manual disassembly of the drawing ring can be omitted, and the double-channel hollow self-drilling anchor rod installation technology is made to be full-automatic.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine roadway anchoring and support, specifically relating to an automatic drilling conversion sleeve. Background Technology

[0002] like Figure 1 The product shown is a dual-channel hollow self-drilling anchor bolt, which includes: a pull-out ring 1, a limit ring 2, a conical nut 3, a tray 4, a hollow rod body 5, a steel wire rope 6, an elastic cylindrical pin 7, a piston 8, an anchoring section rod body 9, an elastic cylindrical pin 10, a drill bit 11, an inner sleeve 12, and an anchoring agent 13. This product uses the hollow rod body 5 to replace the drill rod for drilling, and is pre-tightened by the conical nut 3. The anchoring section rod body 9 integrates a water supply channel and resin anchoring agent, and is equipped with a cutting drill bit 11 at the end. By using the process of the drilling rig retracting, the internal steel wire rope 6 is pulled to push out the internal resin anchoring agent 13, realizing the integrated function of drilling, injection, and anchoring. This product is used in conjunction with an onboard anchor drilling rig. By utilizing only the forward and reverse rotation functions of the onboard anchor drilling rig, it can achieve automated drilling and pre-tightening of the anchor bolt. Power is provided by the retraction of the drilling rig to pull the steel wire rope 6 out of the resin anchoring agent integrated into the inner cavity of the bolt. Compared with anchoring methods such as water pressure pushing and equipment pumping polyurethane, this solution has higher reliability and lower anchoring agent requirements. However, how to automatically pull and detach the steel wire, eliminating manual intervention in the process and achieving automation, has become a major challenge in the use of the product. Utility Model Content

[0003] To overcome the above-mentioned shortcomings of the prior art, this utility model proposes an automatic drilling conversion sleeve for auxiliary anchoring support of coal mine roadways. It is designed according to the installation process of double-channel hollow self-drilling anchor bolts, so that the double-channel hollow self-drilling anchor bolts can achieve mechanized and automated construction when used with ordinary tunneling and anchoring machines for support operations.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an automatic drilling conversion sleeve, including a hexagonal cavity and a threaded interface, as well as a centrifugal locking mechanism and an oblique hole provided between the hexagonal cavity and the threaded interface, wherein: the hexagonal cavity is used to connect the hexagonal nut of the double-channel hollow self-drilling anchor rod; the threaded interface is used to connect the output shaft of the drilling rig; the centrifugal locking mechanism is used to lock and release the pull ring of the double-channel hollow self-drilling anchor rod.

[0005] Furthermore, the centrifugal locking mechanism includes an elastic component and a rotating block. Under normal conditions, the rotating block is ejected by the elastic force of the elastic component to enter a locked state, and during rotation, it is affected by centrifugal force to overcome the elastic force of the elastic component and retract to enter a released state.

[0006] Furthermore, the elastic component is a rubber ring used to provide an inward contraction elastic force.

[0007] Further, the rotating block is a special-shaped metal piece composed of multiple sector faces.

[0008] Further, an installation shaft hole is processed on the rotating block, and the rotating block rotates around the installation shaft hole under the elastic force of the elastic component.

[0009] Further, the installation shaft hole is located on one side deviating from the geometric center of the rotating block.

[0010] Further, a groove for fixing the elastic component is arranged on the rotating block.

[0011] Further, the corners of the rotating block are rounded.

[0012] Further, the rotating block is eight.

[0013] Compared with the prior art, the positive effect of the utility model is:

[0014] The automatic drilling conversion sleeve of the utility model can realize the switching of the locking and loosening states of the locking mechanism by only using the positive and reverse rotation functions of the airborne anchor rod drilling machine, and can pull the steel wire and push out the resin anchoring agent by using the power provided by the backward movement of the drilling machine and by pulling the pulling ring of the double-channel hollow self-drilling anchor rod through the locking mechanism. In the case of using the utility model, the last manual process (disassembling the pulling ring) in the supporting process can be omitted, so that the double-channel hollow self-drilling anchor rod installation process is fully automated, and the automatic drilling conversion sleeve of the utility model can realize the automatic supporting function on the traditional equipment.

[0015] Specific advantages include:

[0016] (1) The utility model provides a brand-new centrifugal self-locking structure: the elastic component and the rotating block are integrated in the internal cavity of the conversion sleeve, the rotating block is popped out to the axis under the constraint of the elastic component, so that it can clamp the pulling ring, at this time, the backward movement of the drilling machine can be directly operated to pull the steel wire; after the pulling is completed, the drilling machine is operated to rotate, the rotating block is rotated and retracted into the cavity under the action of the centrifugal force, the pulling ring is separated from the self-locking state because the position is limited, at this time, the pulling ring is timely blown out and the subsequent operation process is carried out, and automatic installation is realized.

[0017] (2) The utility model provides a novel rotating block structure, the rotating block structure is simple, the failure rate is low, and maintenance is convenient. The rotating block is composed of multiple sector faces, the locking effect is guaranteed, damage to the elastic component is reduced, the installation shaft hole is located on one side deviating from the geometric center, and the installation shaft hole can be deflected around the installation shaft under the action of the elastic component and the centrifugal force, so that the locking and loosening of the pulling ring are realized at different positions.

[0018] (3) The utility model also provides a mode of separating parts in the rotating process: a circle of inclined holes is drilled in the utility model, water flow is guided to wash the parts inside the drill sleeve, the locking block is retracted under the influence of centrifugal force in the high-speed rotating state of the drill sleeve, the pull ring loses position constraint, water flow impact makes it separate outward, and the remaining parts after the installation of the anchor rod are separated. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be explained through examples and with reference to the drawings, wherein:

[0020] Figure 1 is the structural schematic diagram of "double-channel hollow self-drilling anchor rod" matched with the utility model,

[0021] Figure 2 is the structural schematic diagram of the automatic drilling conversion sleeve of the utility model;

[0022] Figure 3 is the side view of the automatic drilling conversion sleeve of the utility model;

[0023] Figure 4 is the side view of the locking mechanism of the automatic drilling conversion sleeve of the utility model;

[0024] Figure 5 is the process schematic diagram of the automatic drilling conversion sleeve of the utility model blowing out the pull ring;

[0025] The reference signs in the drawings include: pull ring 1, limit ring 2, taper nut 3, tray 4, hollow rod body 5, steel wire rope 6, elastic cylindrical pin 7, piston 8, anchoring section rod body 9, elastic cylindrical pin 10, drill bit 11, inner sleeve 12, anchoring agent 13, hexagonal cavity 21, locking mechanism 22, inclined hole 23, threaded interface 24, elastic component 25, rotating block 26, mounting shaft hole 27. DETAILED DESCRIPTION

[0026] Figure 1The utility model is matched with the structure diagram of double -channel hollow self -drilling anchor rod, mainly includes pull ring 1, limit ring 2, taper nut 3, tray 4, hollow rod body 5, steel wire rope 6, elastic cylindrical pin 7, piston 8, anchoring section rod body 9, elastic cylindrical pin 10, drill bit 11, inner sleeve pipe 12, anchoring agent 13, wherein: pull ring 1, limit ring 2 and taper nut 3 are set up on hollow rod body 5, water channel (that is, inner sleeve pipe 12) and anchoring agent 13 are set up in anchoring section rod body 9, piston 8 is set up at both ends of anchoring agent, steel wire rope 6 is set up in hollow rod body and anchoring section rod body inner chamber for pulling piston forward, drill bit 11 is set up at the front end of anchoring section rod body, and the drill bit is set at the front end of anchoring section rod body through elastic cylindrical pin 10. One end of the steel wire rope is connected with the pull ring, the other end passes through the elastic cylindrical pin on the drill bit and is connected with the piston at the other end of the anchoring agent after passing through the piston at one end of the anchoring agent. The external thread of the taper nut is tapered self-tapping thread, which is used for screwing and engaging with the inner hole of the tray 4 arranged on the hollow rod body. The product needs to push the built-in resin anchoring agent 13 through the traction steel wire rope 6, and the steel wire rope 6 is fixed on the surface of the pull ring, and the pull ring is dragged to move the steel wire.

[0027] As Figures 2 to 4 shown, the utility model automatic drilling conversion sleeve includes: hexagonal cavity 21, locking mechanism 22, inclined hole 23 and threaded interface 24, wherein: left end is inner hexagonal cavity 21, is used for connecting anchor rod hexagon nut (that is Figure 1 Tapered nut 3) in the middle of the hexagonal cavity 21 and threaded interface 24 is designed with locking mechanism 22 and inclined hole 23, wherein locking mechanism 22 is composed of 1 elastic component 25 and 8 rotating blocks 26, elastic component 25 is the circular ring of rubber material, is used for providing the elastic force that contracts inwards, rotating block 26 is the special-shaped metal part of multiple sector faces, is processed with installation shaft hole 27 and the recess of fixed elastic component, to avoid the interference of rotation, the opposite angle is rounded, and rotating block 26 rotates around installation shaft hole 27 under the elastic force of elastic component. Elastic component 25 and rotating block 26 are installed on the side close to hexagonal cavity, and the rotating block pops out under the elastic force of elastic component in normal state and is in the locking state, and is retracted in the release state under the influence of centrifugal force in the rotation process. Inclined hole 23 is located behind locking mechanism 22 (close to the side of threaded interface 24), is used for guiding high-pressure water flow or high-pressure gas, so that the water flow or gas is sprayed to the side and washes pull ring along the direction of inclined hole;

[0028] Figure 5It is the process schematic diagram of the automatic drilling conversion sleeve blowing out the pull ring: the drilling sleeve is rotated counterclockwise, the internal rotating block 26 of the drilling conversion sleeve is retracted under the action of centrifugal force, high-pressure water or high-pressure gas is introduced at this time, the water flow or gas is sprayed to the side along the direction of the inclined hole 23 and flushes the pull ring, the pull ring is blown out under the action of friction and impact, the drilling machine can be operated to advance and drive the pre-tightening nut of the drilling machine.

[0029] The machine-mounted anchor rod drilling machine matched with the double-channel hollow self-drilling anchor rod is composed of a long feeding mechanism, a short feeding mechanism, a top plate mechanism and a slide assembly rotating mechanism, wherein: the top plate mechanism is controlled by a single oil cylinder, the top plate mechanism is extended and supported on the coal wall of the hole to be drilled during use, and has the functions of stabilizing the anchor rod drilling machine and supporting the rod; the long and short feeding oil cylinders are connected in parallel and controlled by one-way hydraulic oil, the short feeding oil cylinder causes the rotary drilling machine part to slide on the square guide rail, and the long feeding oil cylinder causes the square guide rail to slide on the slide assembly; the rotating mechanism is composed of a motor, an output shaft and a drilling conversion sleeve, torque is transmitted through the output shaft, the back seal in the water jacket ensures the sealing of the slag water and gas, and the conversion sleeve is used for connecting and driving the anchor rod and locking the pull ring.

[0030] The working principle of the utility model is:

[0031] The automatic drilling conversion sleeve of the utility model converts the output shaft interface of the machine-mounted anchor rod drilling machine, so that the interface size can be matched with the double-channel hollow self-drilling anchor rod construction. One end of the product is processed with an internal thread for connecting the drilling machine motor, and the other end is an internal hexagonal cavity for driving the self-drilling anchor rod nut to rotate. An automatic locking mechanism is designed in the middle of the automatic drilling conversion sleeve. The mechanism is automatically locked under the elastic force of the elastic component, which is convenient for the drilling machine to retreat and pull the steel wire. After the traction is completed, the hydraulic motor is rotated, the centrifugal force is generated during the high-speed rotation of the motor, the rotating block overcomes the elastic force of the elastic component and retracts into the cavity, the locking mechanism is opened to achieve loosening, and the impact force of the water flow or gas is used to blow out the pull ring of the double-channel hollow self-drilling anchor rod, completely replacing the manual operation steps in the supporting process and realizing automatic supporting. The specific working principle is as follows:

[0032] 1) Interface conversion: one end of the conversion sleeve is processed with an internal thread, which is matched with the output shaft thread of the anchor rod drilling machine, the conversion sleeve and the output shaft are fixed through thread glue or a rotation stopping pin, and the slippage of the drilling machine during forward and reverse rotation is prevented. The other end of the conversion sleeve is an internal hexagonal cavity, which is matched with the hexagonal nut (i.e. tapered nut 3) of the double-channel hollow self-drilling anchor rod, and is used to drive the nut to advance and retreat.

[0033] 2) Locking and opening: the automatic drilling conversion sleeve is internally provided with a centrifugal locking mechanism 22, under the constraint of the elastic component 25, the rotating block 26 naturally pops out to block the pull ring 1, at this time the drilling machine can be directly operated to retreat the steel wire rope 6, after the traction is completed, the drilling machine is operated to rotate, in the process of high-speed rotation, the rotating block 26 is retracted into the cavity under the action of centrifugal force, the pull ring 1 loses the position limitation, and the prerequisite for blowing out the pull ring is provided;

[0034] 3) Blow: after the locking mechanism 22 is opened, the drilling water supply switch is turned on, the water flow impacts the surface of the pull ring under the guidance of the internal channel (i.e. the inclined hole 23) of the conversion sleeve, and the pull ring in the free state is blown out.

Claims

1. An automatic drilling conversion sleeve characterized by: The device comprises a hexagonal cavity, a threaded interface, a centrifugal locking mechanism and an inclined hole arranged between the hexagonal cavity and the threaded interface, wherein the hexagonal cavity is used for connecting a hexagonal nut of a double-channel hollow self-drilling anchor rod; the threaded interface is used for connecting a drill output shaft; and the centrifugal locking mechanism is used for locking and releasing a pull ring of the double-channel hollow self-drilling anchor rod.

2. The automatic drilling conversion sleeve of claim 1, wherein: The centrifugal locking mechanism comprises an elastic component and a rotating block, wherein the rotating block is popped out by the elastic force of the elastic component in a normal state to be in a locking state, and is retracted by overcoming the elastic force of the elastic component under the influence of centrifugal force in a rotating process to be in a releasing state.

3. The automatic drilling conversion sleeve of claim 2, wherein: The elastic component is a rubber ring used for providing inwardly retracting elastic force.

4. The automatic drilling conversion sleeve of claim 2, wherein: The rotating block is a special-shaped metal piece composed of multiple fan-shaped surfaces.

5. The automatic drilling conversion sleeve of claim 2, wherein: An installation shaft hole is processed on the rotating block, and the rotating block rotates around the installation shaft hole under the elastic force of the elastic component.

6. The automatic drilling conversion sleeve of claim 5, wherein: The installation shaft hole is located on one side deviated from the geometric center of the rotating block.

7. The automatic drilling conversion sleeve of claim 2, wherein: A groove for fixing the elastic component is arranged on the rotating block.

8. The automatic drilling conversion sleeve of claim 2, wherein: The corners of the rotating block are rounded.

9. The automatic drilling conversion sleeve of claim 2, wherein: The rotating block is eight.

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