A hollow grouting anchor cable structure

Abstract

The present invention relates to a hollow grouting anchor cable structure; since multiple grout stop rings are all sleeved outside the anchor cable body and are located at different positions of the anchor cable body respectively, and each grout stop ring includes an annular member, an inflatable airbag body and an air inlet pipe, when using the hollow grouting anchor cable structure to grout an anchor hole, the air inlet pipes at different positions are inflated and deflated through an air pump, so as to control the inflatable airbag bodies at different positions to be in a contracted or expanded state, and then sectional grouting is carried out at different positions. Compared with the existing sectional hollow grouting anchor cable, which requires multiple steel strands to be spirally wound around the outside of three grouting pipes and grout different positions through the three grouting pipes, the overall structure of the hollow grouting anchor cable structure is smaller, and it is easier for the staff to place the anchor cable body in the anchor hole.

Description

Technical Field

[0001] The present invention relates to the technical field of mine anchor cables, and in particular to a structure of a hollow grouting anchor cable. Background Art

[0002] The prior art (CN110388223B) discloses a hollow grouting anchor cable with segmented grouting and a using method. The hollow grouting anchor cable includes a plug, an anchor cable body, a locking device, a tray and an external grout stop plug; the anchor cable body includes multiple steel strands, and the multiple steel strands are spirally wound around a first grouting pipe and a second grouting pipe. The anchor cable body is connected in an anchor cable hole at the center of the tray and the external grout stop plug; a third grouting pipe is connected through a reserved hole of the external grout stop plug; the slurry outlet positions of the first grouting pipe, the second grouting pipe and the third grouting pipe are different. During use, the three slurry outlets respectively correspond to three different positions of the grouting and anchoring section of the coal and rock mass, so as to realize the segmented grouting operation at the grouting and anchoring section. The present invention has a clever concept and a simple structure. The slurry enters to form different grouting sections, ensuring the balance of the front grouting pressure, increasing the grouting volume of the deep rock stratum fissures, and the slurry evenly diffuses into the surrounding rock fissures. The grouting and anchoring effect of the shallow surrounding rock mass is ensured through secondary grouting.

[0003] Although the above structure can realize the segmented grouting operation at the grouting and anchoring section by making the three slurry outlets respectively correspond to three different positions of the grouting and anchoring section of the coal and rock mass, the anchor cable body is composed of three grouting pipes, and multiple steel strands need to be spirally wound around the outside of the three grouting pipes. The overall structure is relatively large, and it is rather troublesome for the staff to place the anchor cable body in the anchor hole. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure of a hollow grouting anchor cable, so as to solve the problem that the anchor cable body of the segmented hollow grouting anchor cable in the prior art is composed of three grouting pipes, multiple steel strands need to be spirally wound around the outside of the three grouting pipes, the overall structure is relatively large, and it is rather troublesome for the staff to place the anchor cable body in the anchor hole.

[0005] To achieve the above object, the present invention provides a hollow grouting anchor cable structure, which includes an anchor cable body, an anchor head, a hexagonal nut, a hexagonal bolt, a grout stop plug, a plurality of grout stop rings and an air pump. One end of the anchor cable body is provided with the anchor head, and the other end of the anchor cable body is provided with the hexagonal nut. The anchor cable body is arranged in a hollow structure. The anchor head is provided with a grout outlet hole. One end of the hexagonal nut away from the anchor cable body is provided with a grouting hole. The hexagonal bolt is adapted to the grouting hole. The outer part of the anchor cable body is also provided with the grout stop plug. The grout stop plug is located at one end of the anchor cable body close to the hexagonal nut. A plurality of grout stop rings are all sleeved on the outer part of the anchor cable body and are respectively located at different positions of the anchor cable body; each grout stop ring includes an annular member, an air-filled balloon body and an air inlet pipe. The annular member is sleeved on the outer part of the anchor cable body. The outer wall of the annular member is provided with the air-filled balloon body. The air-filled balloon body is provided with the air inlet pipe. One end of the air inlet pipe away from the air-filled balloon body all penetrates through the grout stop plug. The air pump is used to inflate and deflate the air-filled balloon body through the air inlet pipe.

[0006] Since a plurality of grout stop rings are all sleeved on the outer part of the anchor cable body and are respectively located at different positions of the anchor cable body, and each grout stop ring includes an annular member, an air-filled balloon body and an air inlet pipe, when using the hollow grouting anchor cable structure to grout an anchor hole, the air pump inflates and deflates different air inlet pipes, so as to control the air-filled balloon bodies at different positions to be in a contracted or expanded state, and further perform segmented grouting on different positions. Compared with the existing segmented hollow grouting anchor cable, which requires multiple steel strands to be spirally wound around the outside of three grouting pipes and grout different positions through the three grouting pipes, the overall structure of the hollow grouting anchor cable structure is smaller, and it is easier for the staff to place the anchor cable body into the anchor hole.

[0007] Wherein, the anchor cable body includes a hollow core pipe and a plurality of steel strands. The plurality of steel strands are spirally wound around the outside of the hollow core pipe. One end of the hollow core pipe corresponds to the grouting hole, and the other end of the hollow core pipe corresponds to the grout outlet hole.

[0008] The anchor cable body is composed of a plurality of steel strands spirally wound around the outside of the hollow core pipe and the hollow core pipe.

[0009] Wherein, each annular member includes a fixed ring and an installation sleeve ring. The fixed ring is sleeved on the outer part of the anchor cable body. The inner wall of the fixed ring is provided with a fitting groove, which is adapted to the steel strand. The outer wall of the fixed ring is provided with a connecting ring. The installation sleeve ring is detachably connected to the connecting ring. The air-filled balloon body is arranged on the outside of the installation sleeve ring.

[0010] After sleeving the fixing ring on the outside of the cable anchor body, use bolts to fix the installation collar on the fixing ring, thereby completing the installation of the annular member. The fitting groove is provided on the inner part of the fixing ring, and the fitting groove corresponds to the steel strand, so that the annular member is closely attached to the cable anchor body, preventing grout from flowing out from the gap between the annular member and the cable anchor body.

[0011] Wherein, each fixing ring includes a first half-ring and a second half-ring. The fitting grooves are provided on the inner walls of both the first half-ring and the second half-ring. Connecting half-rings are provided on the inner walls of both the first half-ring and the second half-ring. The two connecting half-rings form the connecting ring. Connecting blocks are further provided at both ends of the first half-ring and the second half-ring. The connecting block on the first half-ring is bolted to the connecting block on the second half-ring.

[0012] After sleeving the first half-ring and the second half-ring on the outside of the cable anchor body so that the fitting groove corresponds to the steel strand, use bolts to fix the connecting block on the first half-ring to the connecting block on the second half-ring, thereby completing the installation of the fixing ring.

[0013] Wherein, each installation collar includes a ring body, an inner ring wall and an outer ring wall. The inner ring wall is provided on the inner side of the ring body, and the outer ring wall is provided on the outer side of the ring body. The inner ring wall is detachably connected to the connecting ring, and the air inflation bag body is provided on the outside of the outer ring wall.

[0014] The inner ring wall is detachably connected to the connecting ring, thereby installing the installation collar on the outer wall of the fixing ring. Both the inner ring wall and the outer ring wall are fixedly connected to the ring body and are made by an integral molding technique during manufacturing, making the structure more firm.

[0015] Wherein, a plurality of through holes are provided on the grout plug, and each air inlet pipe respectively penetrates through one of the through holes.

[0016] A plurality of the through holes are provided on the grout plug. The number of the through holes is the same as the number of the air inlet pipes, and the air inlet pipes penetrate through the grout plug through the through holes.

[0017] Wherein, mounting grooves are provided on both sides of each through hole, and rubber rings are provided inside each mounting groove.

[0018] The rubber rings are provided on both sides of the through hole. The sealing performance of the grout plug is enhanced through the rubber rings, preventing grout from flowing out through the through holes.

[0019] Wherein, a plurality of identification plates are arranged on one side of the grout stopping plug close to the hexagonal nut, and each identification plate corresponds to one of the through holes.

[0020] A plurality of identification plates are arranged on the slurry stopper, and each identification plate corresponds to one through hole, so that it is convenient for the staff to accurately inflate and deflate different air inlet pipes.

[0021] A hollow grouting anchor cable structure of the present invention has a plurality of grouting stop rings which are sleeved on the outside of the anchor cable body and are respectively located at different positions of the anchor cable body, and each of the grouting stop rings includes a ring-shaped member, an inflatable bladder and an air inlet pipe. When the hollow grouting anchor cable structure is used to grout the anchor hole, the air pump is used to inflate and deflate the different air inlet pipes, thereby controlling the inflatable bladders at different positions to be in a contracted or expanded state, thereby performing segmented grouting on different positions. Compared with the existing segmented hollow grouting anchor cable, which requires spirally winding a plurality of steel strands around the outside of three grouting pipes and performing grouting on different positions through the three grouting pipes, the overall structure of the hollow grouting anchor cable structure is smaller, and it is easier for the staff to place the anchor cable body in the anchor hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a hollow grouting anchor cable structure provided by the present invention.

[0023] Figure 2 The present invention provides Figure 1 A magnified view of the local structure at A.

[0024] Figure 3 The present invention provides Figure 1 A magnified view of the local structure at B.

[0025] Figure 4 It is a schematic structural diagram of the slurry stopper provided by the present invention.

[0026] Figure 5 It is a schematic diagram of the disassembled structure of the slurry stop ring provided by the present invention.

[0027] 1-anchor cable body, 2-anchor head, 3-hexagonal nut, 4-hexagonal bolt, 5-slurry stop plug, 6-slurry stop ring, 7-air pump, 8-slurry outlet hole, 9-grouting hole, 10-ring, 11-inflatable bladder, 12-air inlet pipe, 13-hollow core tube, 14-steel strand, 15-fixing ring, 16-mounting ring, 17-embedded groove, 18-connecting ring, 19-first half ring, 20-second half ring, 21-connecting half ring, 22-connecting block, 23-ring body, 24-inner ring wall, 25-outer ring wall, 26-through hole, 27-mounting groove, 28-rubber ring, 29-identification plate, 30-sealing plug, 31-pull ring. Detailed implementation manner

[0028] Please refer to Figures 1 to 5 , the present invention provides a hollow grouting anchor cable structure, which includes an anchor cable body 1, an anchor head 2, a hexagonal nut 3, a hexagonal bolt 4, a grout stopper 5, a plurality of grout rings 6 and an air pump 7. One end of the anchor cable body 1 is provided with the anchor head 2, and the other end of the anchor cable body 1 is provided with the hexagonal nut 3. The anchor cable body 1 is arranged in a hollow structure. An outlet hole 8 is provided on the anchor head 2, and a grouting hole 9 is provided at one end of the hexagonal nut 3 away from the anchor cable body 1. The hexagonal bolt 4 is adapted to the grouting hole 9. The outside of the anchor cable body 1 is further provided with the grout stopper 5, and the grout stopper 5 is located at one end of the anchor cable body 1 close to the hexagonal nut 3. A plurality of the grout rings 6 are all sleeved on the outside of the anchor cable body 1 and are respectively located at different positions of the anchor cable body 1.

[0029] Each of the grout rings 6 includes an annular member 10, an air-filled balloon 11 and an air inlet pipe 12. The annular member 10 is sleeved on the outside of the anchor cable body 1. The air-filled balloon 11 is provided on the outer wall of the annular member 10. The air inlet pipe 12 is provided on the air-filled balloon 11. One end of the air inlet pipe 12 away from the air-filled balloon 11 penetrates through the grout stopper 5. The air pump 7 is used to inflate and deflate the air-filled balloon 11 through the air inlet pipe 12.

[0030] Since a plurality of the grout rings 6 are all sleeved on the outside of the anchor cable body 1 and are respectively located at different positions of the anchor cable body 1, and each of the grout rings 6 includes an annular member 10, an air-filled balloon 11 and an air inlet pipe 12, when using the hollow grouting anchor cable structure to grout the anchor hole, the air pump 7 is used to inflate and deflate different air inlet pipes 12, so as to control the air-filled balloons 11 at different positions to be in a contracted or expanded state, and further perform segmented grouting at different positions. Compared with the existing segmented hollow grouting anchor cable, which requires multiple steel strands 14 to be spirally wound around the outside of three grouting pipes and grout different positions through the three grouting pipes, the overall structure of the hollow grouting anchor cable structure is smaller, and it is easier for the staff to place the anchor cable body 1 in the anchor hole.

[0031] The anchor cable body 1 includes a hollow core pipe 13 and a plurality of steel strands 14. The plurality of steel strands 14 are spirally wound around the outside of the hollow core pipe 13. One end of the hollow core pipe 13 corresponds to the grouting hole 9, and the other end of the hollow core pipe 13 corresponds to the outlet hole 8. Specifically, the anchor cable body 1 is composed of a plurality of steel strands 14 spirally wound around the outside of the hollow core pipe 13 and the hollow core pipe 13.

[0032] Each of the annular members 10 includes a fixing ring 15 and a mounting collar 16. The fixing ring 15 is sleeved outside the anchor cable body 1. An engaging groove 17 is provided on the inner wall of the fixing ring 15, and the engaging groove 17 is adapted to the steel strand 14. A connecting ring 18 is provided on the outer wall of the fixing ring 15. The mounting collar 16 is detachably connected to the connecting ring 18. The inflatable airbag body 11 is arranged outside the mounting collar 16.

[0033] After sleeving the fixing ring 15 outside the anchor cable body 1, the mounting collar 16 is fixed to the fixing ring 15 by bolts, thereby completing the installation of the annular member 10. The engaging groove 17 is provided on the inner part of the fixing ring 15, and the engaging groove 17 corresponds to the steel strand 14, so that the annular member 10 is closely attached to the anchor cable body 1, preventing the slurry from flowing out through the gap between the annular member 10 and the anchor cable body 1.

[0034] Each fixing ring 15 includes a first half-ring 19 and a second half-ring 20. The engaging grooves 17 are provided on the inner walls of both the first half-ring 19 and the second half-ring 20. Connecting half-rings 21 are provided on the inner walls of both the first half-ring 19 and the second half-ring 20. The two connecting half-rings 21 form the connecting ring 18. Connecting blocks 22 are further provided at both ends of the first half-ring 19 and the second half-ring 20. The connecting block 22 on the first half-ring 19 is bolted to the connecting block 22 on the second half-ring 20. Each mounting collar 16 includes a ring body 23, an inner ring wall 24, and an outer ring wall 25. The inner ring wall 24 is provided inside the ring body 23, and the outer ring wall 25 is provided outside the ring body 23. The inner ring wall 24 is detachably connected to the connecting ring 18. The inflatable airbag body 11 is arranged outside the outer ring wall 25.

[0035] After sleeving the first half-ring 19 and the second half-ring 20 outside the anchor cable body 1 and making the engaging groove 17 correspond to the steel strand 14, the connecting block 22 on the first half-ring 19 is fixed to the connecting block 22 on the second half-ring 20 by bolts, thereby completing the installation of the fixing ring 15. The inner ring wall 24 is detachably connected to the connecting ring 18, thereby installing the mounting collar 16 on the outer wall of the fixing ring 15. Both the inner ring wall 24 and the outer ring wall 25 are fixedly connected to the ring body 23 and are made by an integral molding technique during manufacturing, making the structure more firm.

[0036] A plurality of through holes 26 are provided on the grout plug 5, each of the air inlet pipes 12 penetrates through one of the through holes 26 respectively, mounting grooves 27 are provided on both sides of each of the through holes 26, and rubber rings 28 are provided inside each of the mounting grooves 27. The number of the through holes 26 is the same as that of the air inlet pipes 12. The air inlet pipes 12 penetrate through the grout plug 5 through the through holes 26, and the rubber rings 28 are provided on both sides of each of the through holes 26. The sealing performance of the grout plug 5 is enhanced by the rubber rings 28 to prevent the slurry from flowing out through the through holes 26.

[0037] A plurality of identification plates 29 are further provided on one side of the grout plug 5 close to the hexagonal nut 3, and each of the identification plates 29 corresponds to one of the through holes 26 respectively. Each of the identification plates 29 corresponds to one of the through holes 26 respectively, so as to facilitate the staff to accurately inflate and deflate different air inlet pipes 12.

[0038] A sealing plug 30 is provided at one end of each of the air inlet pipes 12 away from the corresponding air bag body 11.

[0039] After the air pump 7 inflates the air bag body 11 through the air inlet pipe 12 and the air bag body 11 expands, the air inlet pipe 12 is sealed by the sealing plug 30, so that the air bag body 11 is always in an expanded state.

[0040] A pull ring 31 is provided on each of the sealing plugs 30.

[0041] The pull ring 31 is provided on each of the sealing plugs 30, making it more convenient to remove the sealing plug 30.

Claims

1. A hollow grouting anchor cable structure, characterized in that it includes an anchor cable body, an anchor head, a hexagonal nut, a hexagonal bolt, a grout stopper, a plurality of grout rings and an air pump. One end of the anchor cable body is provided with the anchor head, and the other end of the anchor cable body is provided with the hexagonal nut. The anchor cable body is arranged in a hollow structure. The anchor head is provided with a grout outlet hole. One end of the hexagonal nut away from the anchor cable body is provided with a grouting hole. The hexagonal bolt is adapted to the grouting hole. The outside of the anchor cable body is also provided with the grout stopper. The grout stopper is located at one end of the anchor cable body close to the hexagonal nut. A plurality of grout rings are all sleeved on the outside of the anchor cable body and are respectively located at different positions of the anchor cable body; Each of the grout rings includes an annular member, an inflatable airbag body and an air inlet pipe. The annular member is sleeved on the outside of the anchor cable body. The outer wall of the annular member is provided with the inflatable airbag body. The inflatable airbag body is provided with the air inlet pipe. One end of the air inlet pipe away from the inflatable airbag body penetrates through the grout stopper. The air pump is used to inflate and deflate the inflatable airbag body through the air inlet pipe; The anchor cable body includes a hollow core pipe and a plurality of steel strands; Each of the annular members includes a fixed ring and an installation sleeve ring. The fixed ring is sleeved on the outside of the anchor cable body. The inner wall of the fixed ring is provided with a fitting groove. The fitting groove is adapted to the steel strand. The outer wall of the fixed ring is provided with a connecting ring. The installation sleeve ring is detachably connected to the connecting ring. The inflatable airbag body is arranged on the outside of the installation sleeve ring; Each of the fixed rings includes a first half ring and a second half ring. The inner walls of the first half ring and the second half ring are both provided with the fitting groove. The inner walls of the first half ring and the second half ring are both provided with connecting half rings. The two connecting half rings form the connecting ring. Both ends of the first half ring and the second half ring are also provided with connecting blocks. The connecting block on the first half ring is bolted to the connecting block on the second half ring.

2. The hollow grouting anchor cable structure according to claim 1, characterized in that a plurality of steel strands are spirally wound around the outside of the hollow core pipe. One end of the hollow core pipe corresponds to the grouting hole, and the other end of the hollow core pipe corresponds to the grout outlet hole.

3. The hollow grouting anchor cable structure according to claim 1, characterized in that each of the installation sleeve rings includes a ring body, an inner ring wall and an outer ring wall. The inner side of the ring body is provided with the inner ring wall, and the outer side of the ring body is provided with the outer ring wall. The inner ring wall is detachably connected to the connecting ring. The inflatable airbag body is arranged on the outside of the outer ring wall.

4. The hollow grouting anchor cable structure according to claim 1, characterized in that the grout stopper is provided with a plurality of through holes, and each of the air inlet pipes respectively penetrates through one of the through holes.

5. The hollow grouting anchor cable structure according to claim 4, characterized in that installation grooves are arranged on both sides of each of the through holes, and rubber rings are arranged inside each of the installation grooves.

6. A hollow grouting anchor cable structure according to claim 4, characterized in that a plurality of identification plates are further provided on one side of the grouting stopper close to the hexagonal nut, and each identification plate corresponds to one of the through holes respectively.

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