A sectional self-advancing hollow anchor rod and a quick connecting structure

Abstract

The utility model discloses a sectional type self -advancing hollow anchor rod and quick -witted connection structure belongs to tunnel and underground engineering support construction technical field. Including a plurality of hollow anchor rods, is equipped with the grouting channel in the hollow anchor rod, the spiral rib is fixedly installed on the hollow anchor rod, is provided with the outer connecting sleeve and the inner connecting sleeve on the hollow anchor rod, the bolt is threadedly connected on the hollow anchor rod, the hollow anchor rod is slidably connected with the cushion block and the sealing block, the utility model discloses mud water slurry through grouting groove and into the inner chamber in the grout groove, mud water slurry fills in the inner chamber and then is discharged through the connecting pipe, because the connecting pipe sets up at the upside of fixed block, mud water slurry fills in the rock mass drilling place and can be discharged through the connecting pipe, this makes mud water slurry filling in the rock mass drilling place sufficiently, and then guarantees mud water slurry filling rock mass drilling's effect is better, makes the anchoring system carrying capacity stronger, and then improves sectional type self -advancing hollow anchor rod and quick -witted connection structure's practicality and stability.

Description

Technical Field

[0001] This utility model relates to a segmented self-advancing hollow anchor rod and a quick-connection structure, belonging to the field of tunnel and underground engineering support construction technology. Background Technology

[0002] Self-drilling segmented anchor bolts are a commonly used consolidation material in engineering construction. They are fully threaded rods that can be drilled and grouted in soft surrounding rock such as fractured rock layers and loose soil layers without the need for casing or drill rods. They integrate drilling, grouting and anchoring functions, and are characterized by convenient construction, reliability and high efficiency. The surface of the rod is processed to form international standard threads, which can be reliably connected with standard rock drilling tools such as drilling rigs, anchor bolt trolleys and grouting machines.

[0003] During the grouting process of segmented self-drilling anchor bolts, grouting must reach the point where mud-water grout flows out of the rock borehole to be considered sufficient. Therefore, the pad plate and the rock surface will not be tightly fitted during the grouting process, and gaps need to be left to allow air to escape. After grouting is completed, the bolts need to be rotated to make the pad plate and the rock surface tightly fitted to achieve a sealing effect. However, during the rotation of the bolts, some grout will inevitably leak through the rock borehole. This leakage not only leads to the loss of grouting pressure, but also results in insufficient filling at the rock borehole end, which leads to a weaker bearing capacity of the anchoring system and thus reduces the stability of the entire structure.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a segmented self-advancing hollow anchor rod and a quick connection structure. It solves the problem in the prior art that after grouting is completed, it is necessary to rotate the bolt to make the pad fit tightly with the rock surface to achieve a sealing effect. However, during the rotation of the bolt, some grout will inevitably leak through the rock borehole. This leakage not only leads to the loss of grouting pressure, but also causes insufficient filling at the rock borehole port, resulting in a weaker bearing capacity of the anchoring system and thus reducing the stability of the entire structure.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution: a segmented self-advancing hollow anchor rod and a quick connection structure, including multiple hollow anchor rods, each hollow anchor rod having a grouting channel inside, a spiral rib fixedly installed on the hollow anchor rod, an outer connecting sleeve and an inner connecting sleeve on the hollow anchor rod, bolts threadedly connected to the hollow anchor rod, a pad and a sealing block slidably connected to the hollow anchor rod, the pad and the sealing block being fixedly connected, an inner ring cylinder slidably connected to the hollow anchor rod, a rubber cone and a fixing block fixedly connected to the inner ring cylinder, a grout guiding mechanism on the inner ring cylinder for conducting cement grout.

[0007] A further feature of this invention is that the inner walls of both ends of the hollow anchor rod are provided with a third thread, an inner connecting sleeve is provided inside the hollow anchor rod, the outer walls of both ends of the inner connecting sleeve are provided with a second thread that can be threadedly connected to the third thread, the outer walls of both ends of the hollow anchor rod are provided with a fourth thread, and an outer connecting sleeve is provided on the hollow anchor rod, the inner walls of both ends of the outer connecting sleeve are provided with a first thread that can be threadedly connected to the fourth thread.

[0008] By adopting the above technical solution, when connecting two hollow anchor rods, first drill one hollow anchor rod into the rock mass to a suitable depth, then screw the inner connecting sleeve into the third thread of the hollow anchor rod drilled into the rock mass through the second thread, and then screw the outer connecting sleeve into the fourth thread of the hollow anchor rod drilled into the rock mass through the first thread. Subsequently, screw one end of the other hollow anchor rod into the space between the outer connecting sleeve and the inner connecting sleeve, so that the third thread on the other hollow anchor rod is threadedly connected to the second thread on the other end, and the fourth thread on the other end is threadedly connected to the corresponding first thread. Simultaneously tighten the outer connecting sleeve to complete the connection between the two hollow anchor rods. At this time, the inner connecting sleeve realizes the connection between the two hollow anchor rods, and the outer connecting sleeve strengthens the connection strength between the two hollow anchor rods. The operation is convenient and flexible, and the connection is quick, thereby improving the practicality and flexibility of the segmented self-drilling hollow anchor rod and the quick connection structure.

[0009] The present invention is further configured such that: an anchor drill bit is fixedly installed at one end of any hollow anchor rod, and the anchor drill bit is connected to the grouting channel of the hollow anchor rod.

[0010] By adopting the above technical solution, the anchor drill bit is used to drill holes in the rock mass, so that the hollow anchor rod can be inserted into the rock mass along with the anchor drill bit, and the spiral rib is used to remove debris during drilling of the rock mass.

[0011] The present invention is further configured such that: the grout guiding mechanism includes multiple grout inlet grooves opened on the inner ring cylinder, an inner cavity is opened in the fixed block, multiple grout injection grooves are opened through the inner wall of the rubber cone block, a connecting pipe is fixedly installed on the fixed block, one end of the connecting pipe passes through the inner cavity, and the other end of the connecting pipe is threadedly connected to a cap.

[0012] By adopting the above technical solution, when a hollow anchor rod enters the rock mass to a suitable depth and grouting of the rock borehole is required, first unscrew the cover from the connecting pipe, then rotate the bolt to push the sealing block and the pad towards the fixing block, thereby causing the rotating ball to abut against the rotating annular groove, and pushing the fixing block, inner annular cylinder, and rubber cone towards the rock borehole. During this process, the rubber cone is inserted into the rock borehole and tightly abuts against it. In this solution, the connecting pipe needs to be located on the upper side of the fixing block. Because the rubber cone is made of silicone, the tight abutment between the rubber cone and the rock borehole at this time has a sealing effect. At this point, mud-water grout is injected into the end of the hollow anchor rod exposed on the outside of the rock mass. The slurry penetrates deep into the rock mass through the connected hollow anchor rods and is injected into the rock boreholes and cracks via the anchor rod drill bit. As the slurry is injected, it fills the rock boreholes and cracks, flowing into the grouting groove, the grout inlet groove, and the spiral gap of the spiral ribs. It then enters the inner cavity through the grouting groove and the grout inlet groove. After filling the inner cavity, the slurry is discharged through the connecting pipe. Because the connecting pipe is located on the upper side of the fixed block, the slurry can only be discharged through the connecting pipe after filling the rock borehole. This ensures that the slurry fills the rock borehole fully, thus ensuring a better filling effect and stronger bearing capacity of the anchoring system. This, in turn, improves the practicality and stability of the segmented self-drilling hollow anchor rod and quick-connection structure.

[0013] The present invention is further configured such that: a rotating annular groove is formed on the side of the pad block near the fixed block, and multiple rotating grooves are formed on the side of the fixed block near the pad block; multiple rotating balls are rotatably connected in the rotating grooves, and the rotating balls are slidably connected to the rotating annular grooves. A connecting annular groove is formed on the side of the pad block near the fixed block, and an inner annular cylinder is inserted into the connecting annular groove on the side of the pad block near the pad block; multiple rubber rings are fixedly connected to the inner annular cylinder.

[0014] By adopting the above technical solution, after the rotating ball abuts against the rotating ring groove, the end of the inner ring cylinder is also inserted into the connecting ring groove. The sealing block and the pad block are fixedly connected with sealing elements. The sealing block and the pad block have a sealing effect on the inner ring cylinder, preventing the mud and water slurry from leaking out through the inner ring cylinder. This allows the mud and water slurry to be injected more fully into the drilling hole to fill the rock mass, improving the practicality and stability of the segmented self-advancing hollow anchor bolt and quick connection structure.

[0015] The beneficial effects of this utility model are as follows: When a hollow anchor rod enters the rock mass to a suitable depth and grouting is required in the rock borehole, first unscrew the cover from the connecting pipe, then rotate the bolt to push the sealing block and the pad towards the fixing block, thereby causing the rotating ball to abut against the rotating annular groove, and pushing the fixing block, inner annular cylinder, and rubber cone towards the rock borehole. During this process, the rubber cone is inserted into the rock borehole and tightly abuts against it. In this solution, the connecting pipe needs to be located on the upper side of the fixing block. Because the rubber cone is made of silicone, the tight abutment between the rubber cone and the rock borehole at this time has a sealing effect. At this time, mud-water grout is injected into the end of the hollow anchor rod exposed on the outside of the rock mass. The slurry penetrates deep into the rock mass through the connected hollow anchor rods and is injected into the rock boreholes and cracks through the anchor rod drill bit. As the slurry is injected, it fills the rock boreholes and cracks and flows into the grouting groove, the grout inlet groove, and the spiral gap of the spiral ribs. It then enters the inner cavity through the grouting groove and the grout inlet groove. After filling the inner cavity, the slurry is discharged through the connecting pipe. Because the connecting pipe is located on the upper side of the fixed block, the slurry can only be discharged through the connecting pipe after filling the rock borehole. This ensures that the slurry fills the rock borehole fully, thus ensuring a better filling effect of the slurry into the rock borehole, making the anchoring system more load-bearing, and improving the practicality and stability of the segmented self-drilling hollow anchor rod and quick connection structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the outer connecting sleeve structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the pad structure of this utility model;

[0019] Figure 4 This is a sectional view of the vertical section of the pad block of this utility model;

[0020] Figure 5 This is a vertical cross-sectional view of the fixing block and rubber cone block of this utility model;

[0021] Figure 6 This is a partial front view of the pad and fixing block of this utility model.

[0022] In the picture:

[0023] 1. Hollow anchor bolt; 2. Outer connecting sleeve; 3. Through groove; 4. Spiral rib; 5. First thread; 6. Inner connecting sleeve; 7. Second thread; 8. Third thread; 9. Anchor bolt drill bit; 10. Pad block; 11. Rotating ring groove; 12. Rubber cone block; 13. Fixing block; 14. Inner ring cylinder; 15. Grouting groove; 16. Connecting pipe; 17. Cover; 18. Bolt; 19. Connecting ring groove; 20. Sealing block; 21. Rotating groove; 22. Rotating ball; 23. Rubber ring; 24. Grouting groove; 25. Inner cavity; 26. Fourth thread. Detailed Implementation

[0024] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this utility model, the following details... Figures 1 to 6 As shown, this utility model is further illustrated.

[0025] like Figures 1 to 2 As shown, this utility model is a segmented self-propelled hollow anchor rod and quick-connect structure, including multiple hollow anchor rods 1. Each hollow anchor rod 1 has a grouting channel inside. A spiral rib 4 is fixedly installed on each hollow anchor rod 1. An outer connecting sleeve 2 and an inner connecting sleeve 6 are provided on each hollow anchor rod 1. Bolts 18 are threadedly connected to each hollow anchor rod 1. A pad 10 and a sealing block 20 are slidably connected to each hollow anchor rod 1, and the pad 10 and sealing block 20 are fixedly connected. An inner ring cylinder 14 is slidably connected to each hollow anchor rod 1, and the hollow anchor rod 1 passes through the inner ring cylinder 14. A rubber cone block 12 and a fixing block 13 are fixedly connected to the inner ring cylinder 14. A grout guiding mechanism is provided on the inner ring cylinder 14, which can conduct cement grout and fully fill the rock fissures with the cement grout.

[0026] like Figure 2 As shown, the spiral rib 4 is laser-welded to the outer surface of the hollow anchor rod 1. The inner walls of both ends of the hollow anchor rod 1 are provided with a third thread 8. An inner connecting sleeve 6 is provided inside the hollow anchor rod 1. The outer walls of both ends of the inner connecting sleeve 6 are provided with a second thread 7 that can be threadedly connected to the third thread 8. The outer walls of both ends of the hollow anchor rod 1 are provided with a fourth thread 26. An outer connecting sleeve 2 is provided on the hollow anchor rod 1. The inner walls of both ends of the outer connecting sleeve 2 are provided with a first thread 5 that can be threadedly connected to the fourth thread 26. The two ends of the inner connecting sleeve 6 are screwed into the third thread 8 between adjacent hollow anchor rods 1 to realize the grouting channel connection.

[0027] When connecting two hollow anchor rods 1, first drill one hollow anchor rod 1 into the rock mass to a suitable depth. Then, screw the inner connecting sleeve 6 into the third thread 8 of the hollow anchor rod 1 drilled into the rock mass through the second thread 7. Next, screw the outer connecting sleeve 2 into the fourth thread 26 of the hollow anchor rod 1 drilled into the rock mass through the first thread 5. Then, screw one end of the other hollow anchor rod 1 into the space between the outer connecting sleeve 2 and the inner connecting sleeve 6, so that the third thread 8 on the other hollow anchor rod 1 is threadedly connected to the second thread 7 on the other end, and the fourth thread 26 on the other end is threadedly connected to the corresponding first thread 5. Simultaneously tighten the outer connecting sleeve 2 to complete the connection between the two hollow anchor rods 1. At this time, the inner connecting sleeve 6 realizes the connection between the two hollow anchor rods 1, and the outer connecting sleeve 2 strengthens the connection strength between the two hollow anchor rods 1. The operation is convenient and flexible, and the connection is quick, thereby improving the practicality and flexibility of the segmented self-drilling hollow anchor rod and the quick connection structure.

[0028] like Figures 1 to 2 As shown, an anchor drill bit 9 is fixedly installed at one end of any hollow anchor rod 1, and the anchor drill bit 9 is connected to the grouting channel inside the hollow anchor rod 1.

[0029] The anchor drill bit 9 is used to drill holes in the rock mass, so that the hollow anchor 1 can be inserted into the rock mass along with the anchor drill bit 9. The spiral rib 4 is used to remove debris during drilling of the rock mass.

[0030] In this scheme, when the anchor drill bit 9 drills into the rock mass, the third thread 8 and the second thread 7, as well as the first thread 5 and the fourth thread 26, are all locked by reinforced threads.

[0031] like Figures 3 to 5 As shown, the grout guiding mechanism includes multiple grout inlet grooves 24 formed on the inner ring cylinder 14. The grout inlet grooves 24 penetrate into the inner ring cylinder 14. The fixing block 13 has an inner cavity 25, which is connected to the inside of the grout inlet grooves 24. The inner wall of the rubber cone block 12 has multiple grout injection grooves 15, which are aligned with the grout inlet grooves 24 and are connected to each other. A connecting pipe 16 is fixedly installed on the fixing block 13. One end of the connecting pipe 16 penetrates into the inner cavity 25. The connecting pipe 16 is L-shaped. The other end of the connecting pipe 16 is threaded to a cap 17, which is connected to the inner cavity 25.

[0032] When a hollow anchor rod 1 enters the rock mass to a suitable depth and grouting is required in the rock borehole, first unscrew the cover 17 from the connecting pipe 16, then rotate the bolt 18 to push the sealing block 20 and the pad 10 towards the fixing block 13. This causes the rotating ball 22 to abut against the rotating annular groove 11, and pushes the fixing block 13, the inner annular cylinder 14, and the rubber cone 12 towards the rock borehole. During this process, the rubber cone 12 is inserted into the rock borehole and tightly abuts against it. In this scheme, the connecting pipe 16 needs to be located on the upper side of the fixing block 13. Because the rubber cone 12 is made of silicone, the tight abutment between the rubber cone 12 and the rock borehole at this time has a sealing effect. At this time, mud and water grout is injected into the end of the hollow anchor rod 1 exposed on the outside of the rock mass. The mud-water slurry enters the depth of the rock mass through the connected hollow anchor rod 1 and is injected into the rock borehole and rock fissures through the anchor rod drill bit 9. As the mud-water slurry is injected, it fills the rock borehole and rock fissures and flows into the grouting groove 15, the grouting inlet groove 24 and the spiral gap of the spiral rib 4. It also enters the inner cavity 25 through the grouting groove 15 and the grouting inlet groove 24. After the mud-water slurry fills the inner cavity 25, it is discharged through the connecting pipe 16. Because the connecting pipe 16 is located on the upper side of the fixing block 13, the mud-water slurry can only be discharged through the connecting pipe 16 after filling the rock borehole. This ensures that the mud-water slurry fills the rock borehole more effectively, thus making the anchoring system more load-bearing and improving the practicality and stability of the segmented self-entering hollow anchor rod and quick connection structure.

[0033] Multiple through slots 3 are provided on the outer side of the outer connecting sleeve 2. The through slots 3 can increase the smoothness of the flow of mud and water slurry in the rock borehole.

[0034] like Figures 4 to 6 As shown, a rotating ring groove 11 is provided on the side of the pad 10 near the fixing block 13, and multiple rotating grooves 21 are provided on the side of the fixing block 13 near the pad 10. Multiple rotating balls 22 are rotatably connected in the rotating grooves 21. The multiple rotating balls 22 are arranged in a circumferential array. The rotating balls 22 extend out of the outer side of the fixing block 13 near the rotating ring groove 11 through the rotating grooves 21. The rotating balls 22 are slidably connected to the rotating ring groove 11. The rubber cone block 12 is made of elastic silicone.

[0035] like Figures 4 to 5 As shown, the pad 10 has a connecting ring groove 19 on the side near the fixing block 13, and the inner ring cylinder 14 is inserted into the connecting ring groove 19 on the side near the pad 10. Multiple rubber rings 23 are fixedly connected to the inner ring cylinder 14, and the rubber rings 23 are slidably connected to the connecting ring groove 19.

[0036] In this design, the sliding connection between the rotating ball 22 and the rotating ring groove 11 can reduce the friction between the pad 10 and the fixed block 13, making it easier for the pad 10 to push the fixed block 13 to move.

[0037] After the rotating ball 22 abuts against the rotating annular groove 11, the end of the inner annular cylinder 14 is also inserted into the connecting annular groove 19. The sealing block 20 and the pad block 10 are fixedly connected with sealing elements. The sealing block 20 and the pad block 10 have a sealing effect on the inner annular cylinder 14, preventing the mud and water slurry from leaking out through the inner annular cylinder 14. This allows the mud and water slurry to be injected more fully into the rock mass borehole, improving the practicality and stability of the segmented self-advancing hollow anchor rod and quick connection structure.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A segmented self-drilling hollow anchor bolt and quick-connect structure, comprising multiple hollow anchor bolts (1), characterized in that: The hollow anchor rod (1) is provided with a grouting channel. A spiral rib (4) is fixedly installed on the hollow anchor rod (1). An outer connecting sleeve (2) and an inner connecting sleeve (6) are provided on the hollow anchor rod (1). A bolt (18) is threadedly connected to the hollow anchor rod (1). A pad (10) and a sealing block (20) are slidably connected on the hollow anchor rod (1). The pad (10) and the sealing block (20) are fixedly connected. An inner ring cylinder (14) is slidably connected on the hollow anchor rod (1). A rubber cone block (12) and a fixing block (13) are fixedly connected on the inner ring cylinder (14). A grout guiding mechanism for conducting cement slurry is provided on the inner ring cylinder (14).

2. The segmented self-drilling hollow anchor bolt and quick-connect structure according to claim 1, characterized in that: The hollow anchor rod (1) has a third thread (8) on the inner wall of both ends. An inner connecting sleeve (6) is provided inside the hollow anchor rod (1). A second thread (7) that can be threadedly connected to the third thread (8) is provided on the outer wall of both ends of the inner connecting sleeve (6). A fourth thread (26) is provided on the outer wall of both ends of the hollow anchor rod (1). An outer connecting sleeve (2) is provided on the hollow anchor rod (1). A first thread (5) that can be threadedly connected to the fourth thread (26) is provided on the inner wall of both ends of the outer connecting sleeve (2).

3. The segmented self-drilling hollow anchor bolt and quick-connect structure according to claim 1, characterized in that: An anchor drill bit (9) is fixedly installed at one end of any of the hollow anchor rods (1), and the anchor drill bit (9) is connected to the grouting channel of the hollow anchor rod (1).

4. The segmented self-drilling hollow anchor bolt and quick-connect structure according to claim 1, characterized in that: The grout guiding mechanism includes multiple grout inlet grooves (24) opened on the inner ring cylinder (14), an inner cavity (25) opened in the fixed block (13), multiple grouting grooves (15) opened through the inner wall of the rubber cone block (12), a connecting pipe (16) fixedly installed on the fixed block (13), one end of the connecting pipe (16) is inserted into the inner cavity (25), and the other end of the connecting pipe (16) is threadedly connected to a cover (17).

5. A segmented self-drilling hollow anchor bolt and quick-connect structure according to claim 1, characterized in that: The pad (10) has a rotating ring groove (11) on the side near the fixed block (13), and the fixed block (13) has multiple rotating grooves (21) on the side near the pad (10). Multiple rotating balls (22) are rotatably connected in the rotating grooves (21), and the rotating balls (22) are slidably connected to the rotating ring grooves (11).

6. The segmented self-drilling hollow anchor bolt and quick-connect structure according to claim 1, characterized in that: The pad (10) has a connecting ring groove (19) on the side near the fixing block (13), and the inner ring cylinder (14) is inserted into the connecting ring groove (19) on the side near the pad (10). Multiple rubber rings (23) are fixedly connected to the inner ring cylinder (14).

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