Double-channel hollow self-drilling anchor rod

Abstract

The utility model discloses a double-channel hollow self-drilling anchor rod which comprises a hollow rod body and an anchoring section rod body, a drawing ring, a limiting ring and a conical nut are arranged on the hollow rod body, a water supply channel and an anchoring agent are arranged in the anchoring section rod body, and pistons are arranged at the two ends of the anchoring agent. Steel wire ropes are arranged in inner cavities of the hollow rod body and the anchoring section rod body to pull the piston to move forwards, and a drill bit is arranged at the front end of the anchoring section rod body. Compared with the prior art, the double-channel hollow self-drilling anchor rod has the advantages that the hollow anchor rod is used for replacing a drill rod to conduct drilling, pre-tightening is conducted through the conical nut, the anchoring section rod body integrates the water supply channel and the resin anchoring agent, and the cutting drill bit is assembled at the tail end of the anchoring section rod body. The internal steel wire rope is pulled in the retreating process of the drilling machine, the built-in resin anchoring agent is pushed out, and the drilling, injecting and anchoring integrated function is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coal mine roadway anchoring and supporting, and particularly relates to a double-channel hollow self-drilling anchor rod, which helps to realize mechanized construction in the field of anchoring and supporting. BACKGROUND

[0002] In recent years, with the rapid development of coal mining technology and equipment, the advancing speed and output of the coal mining face have been significantly increased, and the working equipment has basically realized mechanization and is advancing towards automation and intelligence. In comparison, the roadway supporting technology and equipment are relatively backward, especially in the broken surrounding rock roadway of coal mines in the eastern region of China, the driving and supporting speed is slow, and the imbalance between mining and excavation is becoming increasingly prominent. In the entire roadway forming time, the anchor rod supporting takes more than 60% of the time, and is the main factor restricting the rapid driving of the roadway. In order to improve the efficiency of anchor rod supporting, a series of automatic construction equipment such as anchor rod supporting drills and tunneling and anchoring integrated machines and the matching built-in resin anchoring agent anchor rod and automatic ester injection anchor rod have been developed to realize the automatic supporting function under the cooperation of the equipment meeting the working conditions and customized development. However, due to the structural characteristics of the related automatic anchor rod, it can only realize the related functions on the customized development equipment, which limits its compatibility with other equipment construction and reduces the applicability. At present, there is a lack of an anchor rod that can be matched with traditional tunneling equipment and has an automatic construction function. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a double-channel hollow self-drilling anchor rod.

[0004] The utility model discloses a technical scheme that solves the technical problems: a double-channel hollow self-drilling anchor rod, including hollow rod body and anchoring section rod body, set up pull ring, check ring and taper nut on the hollow rod body, set up water supply channel and anchoring agent in the anchoring section rod body, set up piston at both ends of the anchoring agent, set up steel wire rope in the hollow rod body and anchoring section rod body inner chamber for pulling piston forward, set up drill bit at the front end of the anchoring section rod body.

[0005] Further, the water supply channel is an embedded plastic pipe.

[0006] Further, the check ring is fixed on the hollow rod body by welding, screwing or gluing.

[0007] Further, the drill bit is arranged at the front end of the anchoring section rod body through an elastic cylindrical pin.

[0008] Further, one end of the steel wire rope is connected with the pull ring, the other end of the steel wire rope is wound around the elastic cylindrical pin on the drill bit and then passes through the piston at one end of the anchoring agent and is connected with the piston at the other end of the anchoring agent.

[0009] Further, the outer thread of the conical nut is a conical self-tapping thread for screwing engagement with the inner hole of the tray provided on the hollow rod body.

[0010] Further, the end face of the pull ring is provided with a chamfer.

[0011] Further, a shoulder is arranged after the chamfer of the pull ring.

[0012] Further, an anchoring agent discharge hole is arranged at the front end of the anchoring section rod body.

[0013] Compared with the prior art, the positive effects of the utility model are:

[0014] The utility model discloses a double -channel hollow self -drilling anchor rod, uses hollow anchor rod to replace drill rod and carries out drilling, and the anchor rod is integrated with water supply channel and resin anchoring agent through conical nut pre -tightening, and is equipped with cutting drill bit at the end, utilizes the process of the retreat of the drilling machine to pull the internal steel wire rope, pushes out the resin anchoring agent, realizes drilling and injection anchor integrated function. The anchor rod of the utility model has the drill bit and anchoring agent, so that the product has the basic conditions of mechanized construction, and the traditional airborne anchor rod drilling machine with the automatic drilling conversion sleeve is matched, drilling can be carried out after manual placing of the anchor rod, the anchoring agent is pushed out and anchoring is completed immediately after drilling is finished, the whole process does not need manual intervention, does not need to use the drill rod, and is not affected by hole collapse. The anchor rod of the utility model uses double -channel design, completely distinguishes drilling water supply channel and anchoring agent storage channel, can ensure stable drilling deslag water supply, reduces the influence of water on anchoring agent solidification, and the sectional design of the anchor rod body also reduces the difficulty of production and manufacturing. The utility model uses the traction steel wire to provide the power of pushing out the anchoring agent, compared with the anchoring mode of pushing the anchoring agent by high -pressure water and pumping polyurethane of equipment, the scheme has higher reliability, reduces the requirement of anchoring agent, and saves anchoring cost. The utility model only utilizes the positive and negative rotation function of the airborne anchor rod drilling machine, can realize the automatic drilling and pre -tightening of the anchor rod, and provides power through the retreat of the drilling machine, and pushes out the resin anchoring agent. The anchor rod of the utility model can save the anchoring agent loading, drill rod dismounting and anchoring rod advancing procedures in the traditional process, greatly optimizes the construction process of the anchor rod, and makes the traditional equipment also have automatic support construction ability. Specific advantages are as follows:

[0015] 1. The utility model adopts a double -channel resin anchoring agent embedding mode: through embedding plastic pipe, the anchoring agent and drilling water flow channel are completely distinguished, and the anchor rod and resin anchoring agent are integrated as a whole.

[0016] 2. The utility model discloses a kind of drilling, pre-tightening mode of limiting drive: using equipment positive and negative rotation function, by fixed limiting device (not limited to welding described in this paper, it can be fixed mode such as thread screwing or gluing etc.), limit nut retreat to drive rod rotation in nut loosening direction, negative rotation is separated from limiting rotation and realizes nut pre-tightening function;

[0017] 3. The utility model discloses a kind of using mechanical equipment extrusion resin anchoring agent and complete anchoring mode: by drilling machine pull steel wire, and by fixed axle changes direction and then pulls piston, and then pushes and squeezes resin anchoring agent, greatly reduce the requirement to construction equipment and anchoring agent, i.e.

[0018] 4. The utility model discloses a kind of brand-new conical nut structure: its outer thread is tapered self-tapping thread, after drilling to tray position, it can be twisted and engaged with tray inner hole and be stably connected with it, to bear the load in the process of anchoring agent push-out, prevent pulling out rod body in the process of traction anchoring agent, cause anchor rod to drop down;

[0019] 5. The utility model discloses a kind of pull ring structure: its end face chamfer guides anchor rod insertion conversion sleeve, set up retaining shoulder after chamfering for limiting pull ring from conversion sleeve and separate, pull ring hole is not provided with thread, facilitate quick drop-off;

[0020] 6. The utility model discloses a kind of drill bit structure: its drill bit base body punches for cylindrical pin fixed, open groove is communicated with plastic tube and forms drilling water supply passage, traction steel wire rope is changed direction through cylindrical pin by through groove. Using the way of cylindrical pin fixation, simplify the installation, positioning process of drill bit, reduce the processing difficulty of drill bit.

[0021] 7. The utility model discloses anchor rod can carry out one-step construction: can remove drill rod in traditional process, load anchoring agent, load anchor rod process is omitted, greatly optimize the construction technology of anchor rod, can be matched with anchor rod drilling machine and realize one-step support construction, prevent the influence of broken stone hole collapse on construction, improve the efficiency of support construction. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be explained by example and with reference to the accompanying drawings, in which:

[0023] Figure 1 It is the overall composition schematic diagram of the utility model;

[0024] Figure 2 It is the anchor segment rod body double-channel structure schematic diagram of the utility model;

[0025] Figure 3 It is the drilling drive schematic diagram of the utility model;

[0026] Figure 4This is a schematic diagram illustrating the introduction of the anchoring agent of this utility model;

[0027] Figure 5 This is a schematic diagram of the pre-tightening principle of the anchoring agent in this utility model;

[0028] The attached diagram includes the following labels: 1. Pull-out ring; 2. Limiting ring; 3. Conical nut; 4. Tray; 5. Hollow rod; 6. Wire rope; 7. Elastic cylindrical pin; 8. Piston; 9. Anchoring section rod; 10. Elastic cylindrical pin; 11. Drill bit; 12. Inner sleeve; 13. Anchoring agent; 14. Discharge hole. Detailed Implementation

[0029] A type of dual-channel hollow self-drilling anchor bolt, such as Figure 1 As shown, it includes: a pull-out ring 1, a limit ring 2, a conical nut 3, a tray 4, a hollow rod 5, a wire rope 6, an elastic cylindrical pin 7, a piston 8, an anchoring section rod 9, an elastic cylindrical pin 10, a drill bit 11, an inner sleeve 12, an anchoring agent 13, and a discharge hole 14.

[0030] Figure 2 This utility model shows the dual-channel structure of the anchoring section rod (with drill bit). The inner sleeve 12 is a water supply channel, which is normally open and used to guide the drilling and slag discharge water flow. The anchoring agent storage channel contains resin anchoring agent, and the end is sealed with piston 8. The two do not interfere with each other.

[0031] Figure 3 This is a schematic diagram of the drilling drive of this utility model. The working principle of this part is as follows: The hydraulic motor of the anchor drilling machine drives the cone nut 3 to retract and press against the limiting ring 2 (welded and fixed). The retraction of the cone nut is blocked, thereby driving the rod body to rotate and drill, cutting coal and rock.

[0032] Figure 4 This is a schematic diagram of the anchoring agent of this utility model. The working principle of this part is as follows: When the drilling rig drills into the coal wall, the outer tapered thread of the tapered nut 3 engages with the tray 4. At this time, the drilling rig is operated to move backward. Because the hydraulic support plate of the drilling rig presses the tray to prevent the rod from falling (support plate fixed), the drilling conversion sleeve on the drilling rig locks the pull ring 1 and pulls the steel wire rope 6 to move. The steel wire changes direction after the positioning pin 10 of the fixed drill bit and pulls the piston 8 to move forward. The piston pushes the anchoring agent 13 to flow out through the slurry outlet hole at the position of the anchoring agent outlet hole 14.

[0033] Figure 5 This is a schematic diagram of the pre-tightening principle of the anchoring agent of this utility model. The working principle of this part is as follows: Rotate the drill sleeve counterclockwise, so that the drilling conversion sleeve slider retracts under the action of centrifugal force. At this time, high-pressure water or high-pressure gas is introduced to blow out the pull ring 1, and the drilling machine can be operated to advance. Drive the hydraulic motor of the drilling machine to rotate in the opposite direction. At this time, the cone nut 3 disengages from the self-locking and screws in along the rod body. The cone nut 3 pulls the rod body outward through the thread. The tray transmits the pre-tightening force generated by the cone nut 3 to the surrounding rock to achieve pre-tightening.

[0034] The on-board anchor rod drilling machine matched with the utility model 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 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 by two oil cylinders and controlled by one way of 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, and the back sealing in the water jacket ensures the sealing of the slag water and gas, and the conversion sleeve is connected with and drives the anchor rod and the locking pull ring. The construction process of the anchor rod of the utility model comprises: anchor rod installation, anchor rod drilling, drilling machine backward traction anchoring agent, pulling out the pull ring, advancing and stirring the anchoring agent, waiting for condensation and pre-tightening. Compared with the traditional construction process (including: drill rod installation, drill rod drilling, long drill rod replacement, drill rod drilling, disassembly of the drill rod, loading of the anchoring agent, loading of the anchor rod, advancing and stirring the anchoring agent, waiting for condensation and pre-tightening), the utility model omits the traditional process of disassembly of the drill rod, loading of the anchoring agent and loading of the anchor rod, and greatly optimizes the construction process of the anchor rod. The specific process flow is as follows:

[0035] 1) Drilling preparation: the rod body is assembled with the remaining accessories except the tray, the anchor rod is placed in the anchor rod drilling machine drill sleeve, the tray is placed in front of the hydraulic support plate, the drilling machine is pushed against the coal wall, the drilling cooling water is supplied at this time, the water flows through the water supply channel in the hole of the rod body and is directly delivered to the position of the drill bit 11;

[0036] 2) Drilling: the anchor rod drilling machine hydraulic motor is driven to rotate forward, the conical nut 3 retreats against the limiting ring 2 (welded and fixed), the rod body is rotated and drilled by the conical nut 3, and the coal rock is cut. When drilling to the rock wall, the external thread of the conical nut 3 is screwed with the inner hole of the tray, and the drilling is stopped;

[0037] 3) Anchoring: after the conical nut 3 is screwed with the tray 4, the drilling machine is operated to retreat (the support plate is fixed), at this time, the support plate presses the tray to prevent the rod body from falling, the drilling machine drilling conversion sleeve clamps the pull ring 1 and pulls the steel wire rope 6 to move, the steel wire rope changes direction after the drill bit positioning pin 10 and pulls the piston 8 to move forward, the piston pushes the anchoring agent to flow out through the discharge hole 14 below the drill bit 11, after the anchoring agent is completely pushed out, the pull ring 1 is removed and the drilling machine is advanced, the rod body is rotated forward to stir the anchoring agent;

[0038] 4) Pre-tightening: after a period of condensation, the hydraulic motor is driven to rotate reversely, at this time, since the rod body has been anchored, the conical nut 3 rotates along the rod body to realize the pre-tightening function.

Claims

1. A two-pass hollow self-drilling anchor rod, characterized by: The anchor rod comprises a hollow rod body and an anchoring segment rod body, a pulling ring, a limiting ring and a taper nut are arranged on the hollow rod body, a water supply channel and an anchoring agent are arranged in the anchoring segment rod body, pistons are arranged at both ends of the anchoring agent, a steel wire rope is arranged in the hollow rod body and the anchoring segment rod body for pulling the pistons to move forward, and a drill bit is arranged at the front end of the anchoring segment rod body.

2. A two-pass hollow self-drilling anchor rod according to claim 1, characterized in that: The water supply channel is an embedded plastic pipe.

3. A two-pass hollow self-drilling anchor rod according to claim 1, characterized in that: The limiting ring is fixed on the hollow rod body by welding, screwing or gluing.

4. A two-pass hollow self-drilling anchor rod according to claim 1, characterized in that: The drill bit is arranged at the front end of the anchoring segment rod body through an elastic cylindrical pin.

5. A two-pass hollow self-drilling anchor rod according to claim 4, characterized in that: One end of the steel wire rope is connected with the pulling ring, the other end of the steel wire rope is wound around the elastic cylindrical pin on the drill bit and then passes through the piston at one end of the anchoring agent and is connected with the piston at the other end of the anchoring agent.

6. A two-pass hollow self-drilling anchor rod as claimed in claim 1, characterized in that: The outer thread of the taper nut is a tapered self-tapping thread, which is used for screwing and engaging with the inner hole of the tray arranged on the hollow rod body.

7. A two-pass hollow self-drilling anchor rod as claimed in claim 1, characterized in that: The end surface of the pulling ring is provided with a chamfer.

8. A two-pass hollow self-drilling anchor rod according to claim 7, characterized in that: A stop shoulder is arranged behind the chamfer of the pulling ring.

9. A two-pass hollow self-drilling anchor rod according to claim 1, characterized in that: An anchoring agent discharge hole is arranged at the front end of the anchoring segment rod body.

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