Hollow grouting anchor rod pre-positioned before grouting

Abstract

The utility model relates to a hollow grouting anchor rod pre-positioned before grouting, which belongs to the technical field of rock wall support and comprises a hollow rod body inserted in an anchor hole. The anchor head is in threaded connection with one end of the hollow rod body, and a slurry flowing hole communicated with the hollow rod body is formed in the anchor head; the tray is sleeved outside the hollow rod body; the nut is in threaded connection with the hollow rod body, and the nut is used for pressing the tray; the anchor head is provided with a sliding hole, the positioning insertion rod is arranged in the sliding hole in a sliding mode, and one end of the positioning insertion rod is provided with a tip end; the piston is installed between the hollow rod body and the anchor head in a sliding mode, an extrusion part is arranged at one end of the piston, and when the piston slides into the anchor head, the extrusion part extrudes the positioning insertion rod so that the tip end of the positioning insertion rod can stretch out of the anchor head and be inserted into or abut against the hole wall of the anchor hole. Through the structure, by means of the positioning insertion rod and the piston, the anchor rod inserted into the anchor hole is pre-positioned by the anchor head and the whole hollow grouting anchor rod before grouting, and the anchor rod cannot deviate in the anchor hole during grouting.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock wall support, and particularly relates to a hollow grouting bolt with pre-positioning before grouting. Background Art

[0002] The middle of the hollow grouting bolt is hollow. Before grouting, the bolt is first placed into the anchor hole, and then the grout is injected from the tail of the bolt. The grout passes through the center of the bolt and comes out from the anchor head, filling the periphery of the bolt, filling all the voids in the anchor hole and infiltrating into the surrounding rock fissures, enhancing the bonding force between the bolt and the surrounding rock, and simultaneously reinforcing the surrounding rock.

[0003] Generally, the diameter of the anchor hole is slightly larger than the outer diameter of the bolt. When the bolt is inserted into the anchor hole, there is a gap between the outer wall of the bolt and the hole wall of the anchor hole. During the grouting process, due to various reasons, the bolt may shift, thus affecting the construction effect and engineering quality. Content of the Utility Model

[0004] The utility model provides a hollow grouting bolt with pre-positioning before grouting, which is used to solve the technical problem that the existing hollow grouting bolt is prone to shift during the grouting process.

[0005] The utility model is realized by the following technical solutions: a hollow grouting bolt with pre-positioning before grouting, comprising:

[0006] A hollow rod body, inserted into the anchor hole;

[0007] An anchor head, screwed to one end of the hollow rod body, and the anchor head is provided with a grout flow hole communicating with the hollow rod body;

[0008] A tray, sleeved outside the hollow rod body;

[0009] A nut, screwed to the hollow rod body, and the nut is used to press the tray;

[0010] A positioning insertion rod, the anchor head is provided with a sliding hole, the positioning insertion rod is slidably placed in the sliding hole, and one end of the positioning insertion rod has a tip;

[0011] A piston, slidably installed between the hollow rod body and the anchor head, one end of the piston is provided with a pressing part, when the piston slides into the anchor head, the pressing part presses the positioning insertion rod, so that the tip of the positioning insertion rod extends out of the anchor head and inserts into or abuts against the hole wall of the anchor hole.

[0012] Furthermore, in order to better realize the utility model, the anchor head comprises:

[0013] A cylinder has an internal threaded hole at one end, and a round hole is provided at the center of the bottom of the internal threaded hole. The hollow rod body is screwed into the internal threaded hole. The inner hole of the hollow rod body is adapted to and docked with the round hole to form a slideway. The slide hole and the slurry flow hole are both provided on the wall of the round hole, and the slide hole is located near the bottom of the round hole, and the slurry flow hole is located near the orifice of the round hole;

[0014] A cone is fixedly connected to the other end of the cylinder, and the cone is coaxially arranged with the cylinder;

[0015] The piston is slidably installed in the slideway.

[0016] Further, to better implement the present invention, the axial direction of the slide hole is the same as the radial direction of the cylinder, so that the positioning insertion rod slides along the radial direction of the anchor head;

[0017] A first inclined surface is provided at the edge of the other end of the positioning insertion rod. A notch adapted to the positioning insertion rod is provided at one end of the piston. One side wall of the notch constitutes a second inclined surface, and the extrusion part is the second inclined surface;

[0018] When the piston enters the round hole, the positioning insertion rod enters the notch, and the second inclined surface cooperates with the first inclined surface to squeeze the positioning insertion rod.

[0019] Further, to better implement the present invention, the number of the slide holes is two, and the two slide holes are respectively located on both sides of the round hole. A positioning insertion rod is slidably installed in each slide hole. The number of the notches on the piston is two, and the two notches correspond to the two positioning insertion rods one by one;

[0020] A separator is fixedly provided at the bottom of the round hole, and the separator is disposed between the two positioning insertion rods;

[0021] A relief opening is provided on the piston. When the piston enters the round hole, the separator is inserted into the relief opening.

[0022] Further, to better implement the present invention, it further includes:

[0023] A medicine bag containing a resin anchoring agent. An installation opening is provided on the piston. The installation opening is located at the end of the relief opening and is communicated with the relief opening;

[0024] A cutting edge is provided on the separator;

[0025] When the separator is inserted to the end of the relief opening, the cutting edge pierces the medicine bag.

[0026] Further, to better implement the present utility model, a diversion channel is provided on the side wall of the relief opening in the piston, and the diversion channel is used to divert the resin anchoring agent in the installation port to the outside of the piston.

[0027] Further, to better implement the present utility model, the inner hole wall of the hollow rod body is provided with a first guiding rib, the hole wall of the circular hole is provided with a second guiding rib, and the first guiding rib and the second guiding rib are adapted and spliced to form a guiding strip;

[0028] A guiding opening is provided on the outer wall of the piston, and the guiding strip is slidably installed in the guiding opening.

[0029] Further, to better implement the present utility model, it further includes:

[0030] A plastic sheet, bonded to the outer wall of the anchor head, and the plastic sheet plugs the sliding hole from the outside.

[0031] The present utility model has the following beneficial effects compared with the prior art:

[0032] The pre-positioning hollow grouting bolt before grouting provided by the present utility model includes a hollow rod body, an anchor head, a tray, a nut, a positioning plug rod and a piston. The hollow rod body is inserted into an anchor hole on the rock wall. The anchor head is screwed to one end of the hollow rod body. The anchor head is provided with a slurry flow hole communicating with the hollow rod body. The tray is sleeved outside the hollow rod body. The nut is screwed to the hollow rod body, and the nut is used to press the tray against the rock wall. The anchor head is provided with a sliding hole, and the positioning plug rod is slidably placed in the sliding hole, and one end of the positioning plug rod has a tip. The piston is slidably installed between the hollow rod body and the anchor head. One end of the piston is provided with an extrusion part. When the piston slides into the anchor head, the extrusion part extrudes the positioning plug rod, so that the tip of the positioning plug rod extends out of the anchor head and inserts into or abuts against the hole wall of the anchor hole.

[0033] During use, first, an anchor hole is drilled on the rock wall, and then the hollow rod body is inserted into the anchor hole. The anchor head is located at the front end of the hollow rod body, that is, the anchor head will first be inserted into the anchor hole. Then, a high-pressure gas or a telescopic mechanism is used to push the piston, so that the piston enters the anchor head from the inner hole of the hollow rod body. The extrusion part of the piston entering the anchor head extrudes the positioning plug rod, thereby pushing the top end of the positioning plug rod out of the anchor head, and further enabling the tip of the positioning plug rod to insert into or abut against the hole wall of the anchor hole. Then, grouting is carried out from the tail end of the hollow rod body. After the slurry enters the hollow rod body, it will flow out of the slurry flow hole of the anchor head into the anchor hole. After the slurry is solidified, the tray and the nut are installed.

[0034] Through the above positioning insertion rod, the anchor head is clamped into the anchor hole, and the anchor head is screwed and fixed to the hollow rod body. Therefore, before grouting, the whole hollow grouting anchor rod is clamped into the anchor hole. In this way, the anchor rod inserted into the anchor hole is pre-positioned before grouting, and the anchor rod will not shift in the anchor hole during grouting, thus ensuring the construction quality and project quality. Brief Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 is a schematic structural diagram of a pre-positioned hollow grouting anchor rod before grouting provided by an embodiment of the present invention;

[0037] Figure 2 is Figure 1 an exploded view of the pre-positioned hollow grouting anchor rod before grouting shown in;

[0038] Figure 3 is a schematic structural diagram when the piston enters the anchor head and ejects the positioning insertion rod in an embodiment of the present invention;

[0039] Figure 4 is Figure 3 another perspective view of the structure shown in;

[0040] Figure 5 is Figure 4 the A-A cross-sectional view in;

[0041] Figure 6 is a schematic structural diagram of the anchor head in an embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of the piston in an embodiment of the present invention;

[0043] Figure 8 is Figure 7 another perspective view of the piston shown in;

[0044] Figure 9 is a schematic structural diagram of the positioning insertion rod in an embodiment of the present invention;

[0045] Figure 10 is a schematic structural diagram of the hollow rod body in an embodiment of the present invention;

[0046] Figure 11It is a schematic structural view when the piston in the embodiment of the present utility model has not entered the anchor head and the positioning insertion rod is placed inside the anchor head.

[0047] In the figure:

[0048] 100 - Hollow rod body, 110 - First guiding rib, 200 - Anchor head, 210 - Cylindrical body, 211 - Internal threaded hole, 212 - Round hole, 213 - Grout flow hole, 214 - Slide hole, 220 - Cone, 230 - Spacer, 231 - Cutting edge, 240 - Second guiding rib, 300 - Tray, 400 - Nut, 500 - Positioning insertion rod, 510 - First inclined surface, 600 - Piston, 610 - Notch, 620 - Second inclined surface, 630 - Relief opening, 640 - Installation opening, 650 - Diversion channel, 660 - Guiding opening, 700 - Medicine package, 800 - Plastic sheet. Specific embodiments

[0049] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope protected by the present utility model.

[0050] Embodiment:

[0051] As Figures 1-11 shown, the pre - positioning hollow grouting anchor rod before grouting provided in this embodiment includes a hollow rod body 100, an anchor head 200, a tray 300, a nut 400, a positioning insertion rod 500 and a piston 600, wherein:

[0052] The hollow rod body 100 is inserted into an anchor hole on the rock wall. The anchor head 200 is screwed to one end of the hollow rod body 100. The anchor head 200 is provided with a grout flow hole 213 communicating with the hollow rod body 100. The tray 300 is sleeved outside the hollow rod body 100. The nut 400 is screwed to the hollow rod body 100, and the nut 400 is used to press the tray 300 against the rock wall. The anchor head 200 is provided with a slide hole 214. The positioning insertion rod 500 is slidably placed in the slide hole 214, and one end of the positioning insertion rod 500 has a tip end. The piston 600 is slidably installed between the hollow rod body 100 and the anchor head 200. One end of the piston 600 is provided with an extrusion part. When the piston 600 slides into the anchor head 200, the extrusion part extrudes the positioning insertion rod 500, so that the tip end of the positioning insertion rod 500 extends out of the anchor head 200 and inserts into or abuts against the hole wall of the anchor hole.

[0053] During use, an anchor hole is drilled on the rock wall, and then the hollow rod body 100 is inserted into the anchor hole, with the anchor head 200 located at the front end of the hollow rod body 100, that is, the anchor head 200 will be inserted into the anchor hole first, and then the piston 600 is pushed by high-pressure gas or a telescopic mechanism, so that the piston 600 enters the anchor head 200 from the inner hole of the hollow rod body 100, and the extrusion part of the piston 600 entering the anchor head 200 squeezes the positioning rod 500, thereby pushing the top end of the positioning rod 500 out of the anchor head 200, and then the tip of the positioning rod 500 is inserted into or pressed against the hole wall of the anchor hole, and then grouting is performed from the tail end of the hollow rod body 100. After the slurry enters the hollow rod body 100, it will flow out from the slurry hole 213 of the anchor head 200 into the anchor hole. After the slurry solidifies, the tray 300 and the nut 400 are installed.

[0054] Through the above-mentioned positioning rod 500, the anchor head 200 is stuck in the anchor hole, and the anchor head 200 is screwed and fixed to the hollow rod body 100. Therefore, before grouting, the entire hollow grouting anchor rod is stuck in the anchor hole. In this way, the anchor rod inserted into the anchor hole is pre-positioned before grouting. During grouting, the anchor rod will not be offset in the anchor hole, thereby ensuring construction quality and project quality.

[0055] Optionally, the anchor head 200 includes a cylinder 210 and a cone 220, wherein:

[0056] An internal threaded hole 211 is provided at one end of the cylinder 210, and one end of the hollow rod body 100 is screwed into the internal threaded hole 211. A circular hole 212 is provided at the center of the bottom of the internal threaded hole 211. The inner hole of the hollow rod body 100 is adapted to and connected with the circular hole 212 to form a slideway, and the piston 600 is slidably installed in the slideway. The sliding hole 214 and the slurry hole 213 are both provided on the hole wall of the circular hole 212, and the sliding hole 214 is located near the bottom of the circular hole 212, and the slurry hole 213 is located near the mouth of the circular hole 212. In this way, the position setting of the sliding hole 214 and the slurry hole 213 makes it necessary for the piston 600 to pass through the slurry hole 213 before squeezing the positioning rod 500, that is, during grouting, the piston 600 will not cause blockage to the slurry hole 213. The cone 220 is fixed to the other end of the cylinder 210. The cone 220 is coaxial with the cylinder 210, and the tip of the cone 220 faces away from the cylinder 210. The setting of the cone 220 is to facilitate the smooth insertion of the anchor head 200 into the anchor hole.

[0057] Optionally, the axial direction of the sliding hole 214 in this embodiment is the same as the radial direction of the cylinder 210, so that the positioning plug 500 slides along the radial direction of the anchor head 200, that is, the positioning plug 500 enters and exits the anchor head 200 along the radial direction of the anchor head 200. The tip is provided at one end of the positioning plug 500, and a first inclined surface 510 is provided at the edge of the other end of the positioning plug 500. A notch 610 adapted to the positioning plug 500 is provided at one end of the piston 600, and one side wall of the notch forms a second inclined surface 620. The above-mentioned pressing portion is the second inclined surface 620. The positioning plug 500 can move in the notch 610, and the setting of the notch 610 enables the movable plug to not generate lateral offset when entering and exiting the sliding hole 214. When the piston 600 enters the round hole 212, the positioning plug 500 enters the notch 610, and the second inclined surface 620 cooperates with the first inclined surface 510 to press the positioning plug 500. In this way, the length of the positioning plug 500 extending out of the anchor head 200 depends on the situation of the piston 600 entering the round hole 212. When the piston 600 enters the round hole 212 deeper, the positioning plug 500 can be pushed out longer. Moreover, the piston 600 during grouting is blocked by the slurry. Therefore, after being pushed out, the cooperation between the second inclined surface 620 and the first inclined surface 510 can tighten the positioning plug 500.

[0058] Optionally, the number of the sliding holes 214 is two, and the two sliding holes 214 are respectively located on both sides of the round hole 212. A positioning plug 500 is slidably installed in each sliding hole 214. The number of the notches 610 on the piston 600 is two, and the two notches 610 correspond to the two positioning plugs 500 one by one. In this way, the piston 600 drives the two positioning plugs 500 to protrude simultaneously and abut against the inner wall of the anchor hole, so as to better position the anchor rod in the anchor hole. A spacer 230 is fixedly provided at the bottom of the round hole 212, and the spacer 230 is disposed between the two positioning plugs 500. In the initial state, that is, before the piston 600 enters the anchor head 200, the other end of the positioning plug 500 abuts against the spacer 230 or is bonded by an easily torn glue. A relief opening 630 is provided on the piston 600. When the piston 600 enters the round hole 212, the spacer 230 is inserted into the relief opening 630. In this way, the cooperation between the relief opening 630 and the spacer 230 can guide the sliding of the piston 600 in the round hole 212.

[0059] Preferably, it further includes a medicine bag 700 filled with a resin anchoring agent or glue. An installation opening 640 is provided in the piston 600. The installation opening 640 is located at the end of the relief opening 630 and is communicated with the relief opening 630. A cutting edge 231 is provided on the spacer 230. When the spacer 230 is inserted to the end of the relief opening 630, the cutting edge 231 pierces the medicine bag 700, and the resin anchoring agent or glue in the medicine bag 700 will flow out of the anchor head 200 and into the above-mentioned round hole 212, so as to fill the gaps in the round hole 212 and the sliding hole 214, so that the piston 600 is adhesively fixed in the round hole 212 of the anchor head 200, thereby maintaining a firm abutment against the positioning insertion rod 500.

[0060] In order to ensure that the resin anchoring agent or glue can smoothly flow out of the installation opening 640 and enter the round hole 212, in this embodiment, a diversion channel 650 is provided on the side wall of the relief opening 630 in the piston 600. The diversion channel 650 is used to divert the resin anchoring agent in the installation opening 640 to the outside of the piston 600. In this way, the medicine bag 700 is punctured in the installation opening 640, that is, the resin anchoring agent or glue will first flow into the installation opening 640, and then enter the round hole 212 through the diversion channel 650.

[0061] In order to prevent the piston 600 from rotating when sliding in the slideway and to enable the piston 600 entering the round hole 212 to smoothly snap the positioning insertion rod 500 into the notch 610, in this embodiment, a first guiding rib 110 is provided on the inner hole wall of the hollow rod body 100, and a second guiding rib 240 is provided on the hole wall of the round hole 212. The first guiding rib 110 and the second guiding rib 240 are adapted and spliced to form a guiding strip. A guiding opening 660 is provided on the outer wall of the piston 600, and the guiding strip is slidably installed in the guiding opening 660, so as to perform guiding by means of the cooperation between the guiding strip and the guiding opening 660.

[0062] Optionally, the hollow grouting anchor rod provided in this embodiment further includes a plastic sheet 800, which is adhered to the outer wall of the anchor head 200. The plastic sheet 800 plugs the sliding hole 214 from the outside, so as to prevent the positioning insertion rod 500 from sliding out of the sliding hole 214. Of course, it is easy to understand that before the anchoring support, the plastic sheet 800 needs to be torn off first, and when the anchor head 200 is inserted into the anchor hole, try to keep the sliding hole 214 horizontal during insertion. Of course, a rubber sheet can also be adhered to the tail end of the hollow rod body 100 to prevent the piston 600 from sliding out and falling off the hollow rod body 100, and the rubber sheet is torn off during the anchoring support.

[0063] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope recorded in the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A hollow grouting bolt for pre-positioning before grouting, characterized in that, Comprising: A hollow rod body (100) inserted into an anchor hole; An anchor head (200) screwed to one end of the hollow rod body (100), and the anchor head (200) is provided with a slurry flow hole (213) communicating with the hollow rod body (100); A tray (300) sleeved outside the hollow rod body (100); A nut (400) screwed to the hollow rod body (100), and the nut (400) is used to press the tray (300); A positioning plug rod (500), the anchor head (200) is provided with a sliding hole (214), the positioning plug rod (500) is slidably placed in the sliding hole (214), and one end of the positioning plug rod (500) has a tip; A piston (600) slidably installed between the hollow rod body (100) and the anchor head (200), one end of the piston (600) is provided with an extrusion part, when the piston (600) slides into the anchor head (200), the extrusion part extrudes the positioning plug rod (500) so that the tip of the positioning plug rod (500) extends out of the anchor head (200) and inserts into or abuts against the wall of the anchor hole.

2. The pre-positioned hollow grouting bolt before grouting according to claim 1, characterized in that, The anchor head (200) includes: A cylinder body (210) with an internal threaded hole (211) opened at one end, a round hole (212) opened at the center of the bottom of the internal threaded hole (211), the hollow rod body (100) is screwed in the internal threaded hole (211), the inner hole of the hollow rod body (100) is adapted to and docked with the round hole (212) to form a slideway, the sliding hole (214) and the slurry flow hole (213) are both opened on the wall of the round hole (212), and the sliding hole (214) is located near the bottom of the round hole (212), and the slurry flow hole (213) is located near the orifice of the round hole (212); A cone body (220) fixedly connected to the other end of the cylinder body (210), and the cone body (220) is coaxially arranged with the cylinder body (210); The piston (600) is slidably installed in the slideway.

3. The pre-positioning hollow grouting anchor rod before grouting according to claim 2, wherein: The axial direction of the sliding hole (214) is the same as the radial direction of the cylinder body (210) so that the positioning plug rod (500) slides along the radial direction of the anchor head (200); A first inclined surface (510) is arranged at the edge of the other end of the positioning plug rod (500), a notch (610) adapted to the positioning plug rod (500) is opened at one end of the piston (600), one side wall of the notch constitutes a second inclined surface (620), and the extrusion part is the second inclined surface (620); When the piston (600) enters the round hole (212), the positioning plug rod (500) enters the notch (610), and the second inclined surface (620) cooperates with the first inclined surface (510) to extrude the positioning plug rod (500).

4. The pre-positioning hollow grouting anchor rod before grouting according to claim 3, wherein: There are two sliding holes (214), which are respectively located on both sides of the circular hole (212). A positioning rod (500) is slidably installed in each sliding hole (214). There are two notches (610) on the piston (600), and the two notches (610) correspond one to one with the two positioning rods (500). A spacer (230) is fixedly provided at the bottom of the circular hole (212), and the spacer (230) is provided between the two positioning rods (500); A clearance opening (630) is provided on the piston (600). When the piston (600) enters the circular hole (212), the spacer (230) is inserted into the clearance opening (630).

5. The pre-positioned hollow grouting bolt before grouting according to claim 4, characterized in that Also includes: a medicine bag (700) containing a resin anchoring agent, a mounting port (640) being provided on the piston (600), the mounting port (640) being located at the end of the clearance port (630) and being in communication with the clearance port (630); A cutting edge (231) is provided on the spacer (230); When the septum (230) is inserted to the end of the clearance opening (630), the cutting edge (231) punctures the medicine package (700).

6. The hollow grouting anchor bolt pre-positioned before grouting according to claim 5, characterized in that: The piston (600) is provided with a guide channel (650) located on the side wall of the clearance port (630), and the guide channel (650) is used to guide the resin anchoring agent in the installation port (640) to the outside of the piston (600).

7. The hollow grouting anchor bolt pre-positioned before grouting according to any one of claims 2 to 6, characterized in that: The inner hole wall of the hollow rod body (100) is provided with a first guide ridge (110), and the hole wall of the circular hole (212) is provided with a second guide ridge (240), wherein the first guide ridge (110) and the second guide ridge (240) are adapted and matched to form a guide strip; A guide opening (660) is provided on the outer wall of the piston (600), and the guide bar is slidably installed in the guide opening (660).

8. The pre-positioned hollow grouting bolt before grouting according to claim 4, characterized in that, Also includes: A plastic sheet (800) is bonded to the outer wall of the anchor head (200), and the plastic sheet (800) blocks the sliding hole (214) from the outside.

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