A kind of anti-clogging hollow grouting anchor

Abstract

The utility model provides an anti-clogging hollow grouting anchor rod, which can improve the anchoring effect and reduce local water seepage. The hollow grouting anchor rod comprises an anti-clogging anchor rod body and an anchor rod head detachably connected to the anti-clogging anchor rod body. The anti-clogging anchor rod body comprises an anchor rod and an anti-clogging rod. The anchor rod is a rod body with a hollow bottom and a closed bottom. The rod body of the anchor rod is provided with a plurality of grouting holes. The inner wall of the anchor rod is provided with an assembly groove arranged along the axial direction of the anchor rod. The outer wall of the anti-clogging rod is provided with reinforcing ribs, which are assembled in the assembly grooves. The rod body of the anti-clogging rod is also provided with a plurality of circles of cleaning brushes distributed in an array. The cleaning brushes are in contact with the inner wall of the anchor rod. The outer wall of the anti-clogging rod is also fixedly provided with a rubber plug for sealing the grouting hole, and the diameter of the rubber plug is smaller than the diameter of the grouting hole.

Description

Technical Field

[0001] The utility model relates to the field of anchoring engineering, in particular to an anti-clogging hollow grouting anchor rod. Background Art

[0002] The self-propelled hollow grouting anchor is an advanced anchoring system with integrated functions of drilling, injection and anchoring. It can effectively solve the hole collapse problem during the drilling construction process and ensure the grouting effect under complex geological conditions.

[0003] The self-propelled hollow grouting anchor rod consists of a rod body, a disposable drill bit, an arch pad, and a nut. During grouting, a rubber stopper is added to the tail of the anchor rod. However, in the actual drilling process, the gravel produced by the drill bit drilling the rock formation will block the grouting hole, so that the stratum voids at the blocked grouting hole cannot be filled with concrete slurry, resulting in local water seepage and other phenomena; and during the grouting process, due to the mixing of concrete slurry and overflowing drainage liquid, the operator misjudged that the internal concrete slurry was fully filled, resulting in local water seepage and other phenomena. Utility Model Content

[0004] The utility model aims to provide an anti-clogging hollow grouting anchor rod, which can improve the anchoring effect and reduce local water seepage.

[0005] The embodiment of the utility model is achieved as follows:

[0006] The utility model provides an anti-clogging hollow grouting anchor rod, which comprises an anti-clogging anchor rod body and an anchor rod head detachably connected to the anti-clogging anchor rod body, the anti-clogging anchor rod body comprises an anchor rod and an anti-clogging rod, the anchor rod is a rod body with an internal hollow bottom and a closed bottom, the rod body of the anchor rod is provided with a plurality of grouting holes, the inner wall of the anchor rod is provided with an assembly groove arranged along the axial direction of the anchor rod; the outer wall of the anti-clogging rod is provided with reinforcing ribs, the reinforcing ribs are assembled in the assembly groove, the rod body of the anti-clogging rod is also provided with a plurality of circles of cleaning brushes distributed in an array, the cleaning brushes are in contact with the inner wall of the anchor rod, the outer wall of the anti-clogging rod is also fixedly provided with a rubber plug for sealing the grouting hole, the diameter of the rubber plug is smaller than the diameter of the grouting hole.

[0007] In a preferred embodiment of the present utility model, a traction ring is provided on each of the rubber plugs.

[0008] In a preferred embodiment of the present utility model, the length of the anti-blocking rod is greater than the length of the anchor rod, and the end of the anti-blocking rod is provided with a connecting part with the same structure and size as the end of the anchor rod, and the connecting part is used to connect to the down-the-hole drilling rig; the connecting part and the anchor rod connecting end are provided with external threads, and the connecting end of the anchor rod and the connecting part is provided with internal threads.

[0009] In a preferred embodiment of the utility model, the above-mentioned anchor head includes a fixed section, a reaming section and a self-advancing anchor head section which are arranged in sequence, and the fixed section is detachably connected to the closed end of the anchor; the outer wall of the reaming section is provided with reaming cones arranged back to back, and the two reaming cones are in a structure with a large middle and small sides, and the reaming cones are provided with spiral reaming patterns; the self-advancing anchor head section is provided with a self-advancing anchor head.

[0010] In a preferred embodiment of the utility model, the above-mentioned hollow grouting anchor rod further includes a grout stopper, a pad and a nut which are sequentially assembled on the anchor rod.

[0011] In a preferred embodiment of the utility model, the above-mentioned gasket includes a gasket body and a sealing cover, the middle part of the gasket body protrudes toward the nut to form an arc-shaped accommodating groove, and a through hole for the anchor rod to pass through is arranged in the middle of the arc-shaped accommodating groove; the sealing cover is provided with a bowl-shaped sealing cover covering the arc-shaped accommodating groove, and a through hole for the anchor rod to pass through is arranged in the middle of the bowl-shaped sealing cover; the opening edge of the bowl-shaped sealing cover is provided with a widened edge, and the widened edge is provided with a suction cup group arranged in a ring.

[0012] The beneficial effects of the embodiments of the utility model are:

[0013] 1. Set an assembly groove on the inner wall of the anchor rod for assembling the anti-blocking rod. When the grouting anchor rod is inserted into the foundation, the gravel generated by drilling will not block the grouting hole. Connect the anti-blocking rod to the down-the-hole drill, lock the drill holder and rotate forward, and start drilling. When the grouting anchor rod is drilled into place, lock the drill holder, reverse the down-the-hole drill, remove the anti-blocking rod from the drill, move the drill away, and assemble the grouting pipe to complete the grouting work.

[0014] 2. The rod body of the anti-clogging rod is also provided with a cleaning brush, which is used to further clean the anchor rod grouting port and grouting hole during the withdrawal of the anti-clogging rod to prevent clogging;

[0015] 3. A rubber plug is provided on the outer wall of the anti-clogging rod. The diameter of the rubber plug is smaller than the diameter of the grouting hole, so that there will be no gravel blocking the grouting hole during the drilling process. At the same time, the rubber plug can be easily pulled out when it is pulled out;

[0016] 4. A traction ring is also provided on the rubber plug, which is used to be easily led out when it is assembled into other hollow grouting anchor rods next time, so as to seal the grouting holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a hollow grouting anchor rod according to an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of a cross-sectional result of a hollow grouting anchor rod with an anti-clogging rod assembled according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the hollow grouting anchor rod in the grouting process of the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the sealing cover structure of an embodiment of the utility model;

[0022] Icons: 100-anti-clogging anchor body; 110-anchor head; 111-reaming cone; 112-self-advancing anchor head; 120-anchor; 121-grouting hole; 122-assembly groove; 123-connecting part; 124-anchor ring; 125-annular grid; 130-anti-clogging rod; 131-reinforcement rib; 132-cleaning brush; 133-rubber plug; 134-traction ring; 140-grouting plug; 150-pad; 160-nut; 170-sealing cover; 171-steel threaded pipe; 172-bowl-shaped sealing cover; 173-suction cup set. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] First embodiment

[0030] See also Figure 1-4 This embodiment provides an anti-clogging hollow grouting anchor rod, which includes an anti-clogging anchor rod body 100 and an anchor rod head 110 detachably connected to the anti-clogging anchor rod body 100.

[0031] Among them, the anti-blocking anchor rod body 100 includes an anchor rod 120 and an anti-blocking rod 130. The anchor rod 120 is a rod body with a hollow interior and a closed bottom. The rod body of the anchor rod 120 is provided with a plurality of grouting holes 121. The inner wall of the anchor rod 120 is provided with an assembly groove 122 arranged along the axial direction of the anchor rod 120 for assembling the anti-blocking rod 130.

[0032] The rod body of the anchor rod 120 is also provided with an anchor ring 124 and an annular grid 125 connected to the anchor ring, so that the anchoring strength can be improved after the concrete slurry is poured.

[0033] The outer wall of the anti-blocking rod 130 is provided with a reinforcing rib 131 , and the reinforcing rib 131 is assembled in the assembly groove 122 for easy assembly. During assembly, the anti-blocking rod 130 can be inserted into the anchor rod 120 .

[0034] The rod body of the anti-clogging rod 130 is also provided with a plurality of circles of cleaning brushes 132 distributed in an array, and the cleaning brushes 132 are in contact with the inner wall of the anchor rod 120. The cleaning brushes 132 are used to further clean the grouting channel when the anchor rod 120 is pulled out.

[0035] The outer wall of the anti-clogging rod 130 is also fixedly provided with a rubber plug 133 for plugging the grouting hole 121, and the diameter of the rubber plug 133 is smaller than the diameter of the grouting hole 121. Each rubber plug 133 is provided with a traction ring 134, which can be used to use a clamp to lead the traction ring 134 out of the anchor rod 120 when it is used again.

[0036] The length of the anti-blocking rod 130 is greater than that of the anchor rod 120. The end of the anti-blocking rod 130 is provided with a connecting portion 123 having the same structure and size as the end of the anchor rod 120. The connecting portion 123 is used to connect the down-the-hole drill, so that during the drilling process, the drill clamp can lock the anchor rod 120 and the anti-blocking rod 130. In the case where there is only one set of drill clamps, only the anchor rod 120 can be locked; the connecting portion 123 and the connecting end of the anchor rod 120 are provided with external threads, and the connecting end of the anchor rod 120 and the connecting portion 123 are provided with internal threads, which are used to form the anchor rod 120 and the anti-blocking rod 130 into a whole in an assembled manner.

[0037] The drilling method of the anti-clogging hollow grouting anchor rod 120 in this embodiment is:

[0038] The drilling rig is in place, and the drilling rig is placed at the designated hole position to ensure stability and verticality; the anchor rod 120 with the anti-blocking rod 130 inserted is fixed on the drilling rig, and the anchor rod 120 and the heads of the anti-blocking rod 130 are locked with a drill clamp, and then the drilling work is carried out. After the drilling is completed, the drill clamp is released, and the locking position of the drill clamp is adjusted to lock the head of the anti-blocking rod 130, and the drilling rig is turned on and reversed to pull out the anti-blocking rod 130.

[0039] In the present embodiment, the structure of the anchor head 110 is also improved. The anchor head 110 includes a fixed section, a hole expansion section and a self-propelled anchor head section which are arranged in sequence. The fixed section is detachably connected to the closed end of the anchor 120. The outer wall of the hole expansion section is provided with hole expansion cones 111 which are arranged back to back. The two hole expansion cones 111 are in a structure with a large middle part and small sides. The hole expansion cones 111 are provided with spiral hole expansion patterns. The self-propelled anchor head section is provided with a self-propelled anchor head 112.

[0040] The anchor head 110 is provided with a double-conical spiral hole expansion cone 111, so that it can be better combined with the concrete after pouring while expanding the hole, thereby increasing stability.

[0041] At the same time, during the grouting process, when the concentration of the slurry discharged from the anchor 120 hole is the same as the concentration of the injected concrete slurry, the internal concrete is considered to be completely filled, and then the grouting pipe is taken. However, in the actual operation, part of the leaked concrete is mixed with the discharged slurry, making it difficult to distinguish the concentration of the discharged slurry from the injected concrete slurry, resulting in failure to complete the filling of the interior.

[0042] Therefore, this embodiment also improves the pad used in the grouting process to reduce the leakage of concrete. The hollow grouting anchor 120 includes a stopper 140, a pad 150 and a nut 160 which are sequentially assembled on the anchor 120. Among them, the pad 150 includes a pad body and a sealing cover 170. The middle part of the pad body protrudes toward the nut to form an arc-shaped receiving groove. The middle part of the arc-shaped receiving groove is provided with a through hole for the anchor 120 to pass through; the sealing cover 170 is provided with a bowl-shaped sealing cover 172 covering the arc-shaped receiving groove, and the middle part of the bowl-shaped sealing cover 172 is provided with a steel threaded pipe 171 for the anchor 120 to pass through; the opening edge of the bowl-shaped sealing cover 172 is provided with a widened edge, and the widened edge is provided with a suction cup group 173 arranged in a ring. The bowl-shaped sealing cover 172 is made of silicone.

[0043] In this embodiment, a detachable sealing cover 170 is provided to strengthen the sealing between the pad 150 and the grouting pipe during the grouting process, so that the concrete slurry during the grouting process will not be mixed with the slurry emerging from the anchor rod 120 position, thereby improving the accuracy of the grouting amount.

[0044] The grouting method is as follows: after pulling out the anti-clogging rod 130, install the grouting plug 140 on the anchor rod 120, then assemble the pad 150 and the sealing cover 170, screw them into the grouting pipe, so that the bowl-shaped sealing cover 172 of the sealing cover can seal the end of the grouting pipe. After the grouting is completed, screw out the grouting pipe and the sealing cover, assemble the nut and it is done.

[0045] The beneficial effects of the embodiments of the utility model are:

[0046] 1. An assembly groove 122 is provided on the inner wall of the anchor rod 120 for assembling the anti-blocking rod 130. When the grouting anchor rod 120 is inserted into the foundation, the gravel generated by the drilling will not block the grouting hole 121. The down-the-hole drill is connected to the anti-blocking rod 130, the drill holder is locked and rotated forward, and the drilling operation is carried out; when the grouting anchor rod 120 is drilled into place, the drill holder is locked, the down-the-hole drill is reversed, the anti-blocking rod 130 is removed from the drilling rig, the drilling rig is removed, and the grouting work is completed by assembling the grouting pipe;

[0047] 2. The rod body of the anti-clogging rod 130 is also provided with a cleaning brush 132, which is used to further clean the grouting port and grouting hole 121 of the anchor rod 120 during the withdrawal of the anti-clogging rod 130 to prevent clogging;

[0048] 3. A rubber plug 133 is provided on the outer wall of the anti-clogging rod 130. The diameter of the rubber plug 133 is smaller than the diameter of the grouting hole 121, so that the grouting hole 121 will not be blocked by gravel during the drilling process. At the same time, the rubber plug 133 can be easily pulled out when being pulled out;

[0049] 4. A traction ring 134 is also provided on the rubber plug 133 , which is used to be easily drawn out when other hollow grouting anchor rods 120 are assembled next time, so as to seal the grouting hole 121 .

[0050] This specification describes examples of embodiments of the utility model, and it is not intended that these embodiments illustrate and describe all possible forms of the utility model. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings do not need to be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the utility model in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any of the drawings can be combined with the features illustrated in one or more other drawings to form embodiments that are not explicitly described or described. The described combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the utility model can be used for specific applications or implementations as needed.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An anti-clogging hollow grouting anchor, characterized in that: The hollow grouting anchor comprises an anti-clogging anchor body and an anchor head detachably connected to the anti-clogging anchor body, and the anti-clogging anchor body comprises: The anchor rod is a rod body with a hollow interior and a closed bottom. The rod body of the anchor rod is provided with a plurality of grouting holes, and the inner wall of the anchor rod is provided with an assembly groove arranged along the axial direction of the anchor rod; An anti-clogging rod, wherein the outer wall of the anti-clogging rod is provided with reinforcing ribs, and the reinforcing ribs are assembled in the assembly groove. The rod body of the anti-clogging rod is also provided with multiple circles of cleaning brushes distributed in an array, and the cleaning brushes are in contact with the inner wall of the anchor rod. The outer wall of the anti-clogging rod is also fixedly provided with a rubber plug for sealing the grouting hole, and the diameter of the rubber plug is smaller than the diameter of the grouting hole.

2. The anti-clogging hollow grouting anchor according to claim 1, characterized in that: Each of the rubber plugs is provided with a traction ring.

3. The anti-clogging hollow grouting anchor according to claim 1, characterized in that: The length of the anti-blocking rod is greater than that of the anchor rod, and the end of the anti-blocking rod is provided with a connecting part with the same structure and size as the end of the anchor rod, and the connecting part is used to connect to a down-the-hole drill; the connecting part and the anchor rod connecting end are provided with external threads, and the connecting end of the anchor rod and the connecting part is provided with internal threads.

4. The anti-clogging hollow grouting anchor according to any one of claims 1 to 3, characterized in that: The anchor head includes a fixed section, a hole expansion section and a self-advancing anchor head section which are arranged in sequence, and the fixed section is detachably connected to the closed end of the anchor; the outer wall of the hole expansion section is provided with hole expansion cones which are arranged back to back, and the two hole expansion cones are in a structure with a large middle part and small sides, and the hole expansion cones are provided with spiral hole expansion patterns; the self-advancing anchor head section is provided with a self-advancing anchor head.

5. The anti-clogging hollow grouting anchor according to any one of claims 1 to 3, characterized in that: The hollow grouting anchor rod also includes a grout stopper, a pad and a nut which are sequentially assembled on the anchor rod.

6. The anti-clogging hollow grouting anchor according to claim 5, characterized in that: The backing plate comprises: A backing plate body, the middle portion of which protrudes toward the nut to form an arc-shaped receiving groove, and a through hole for the anchor rod to pass through is provided in the middle portion of the arc-shaped receiving groove; A sealing cover, wherein the sealing cover is provided with a bowl-shaped sealing cover covering the arc-shaped receiving groove, and a through hole for the anchor rod to pass through is provided in the middle of the bowl-shaped sealing cover; the opening edge of the bowl-shaped sealing cover is provided with a widened edge, and the widened edge is provided with a suction cup group arranged in a ring.

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