Anchoring device for civil engineering construction

Abstract

The application provides an anchoring device for civil engineering construction, which comprises a nut, a backing plate and a grout stopper, the nut is threadedly connected to the upper part of a hollow anchor rod, the backing plate is arranged on the upper part of the hollow anchor rod below the nut, the grout stopper is arranged on the upper part of the hollow anchor rod below the backing plate, the lower end of the hollow anchor rod is provided with an alloy drill bit, the upper part of the alloy drill bit is provided with a plurality of threaded pins, the lower part of the hollow anchor rod and the upper part of the alloy drill bit are threadedly connected with an expansion mechanism, the threaded pin is connected with the anchor rod in the mode of clamping groove instead of the traditional mode of threadedly connecting the anchor rod, the drill bit can be rotated in the forward and reverse directions through the control of a drilling machine, the expansion mechanism is controlled to rotate in the forward and reverse directions to loosen the soil layer around the anchor rod and insert a hole, a large volume anchor body with a larger anchoring area is formed after grouting, the depth of the anchor rod drilled into is reduced, the problem that the anchoring head is prone to tilting is fundamentally solved, and the construction qualified rate is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural production equipment technology, and more specifically to anchoring devices used in civil engineering construction. Background Technology

[0002] In the process of civil engineering construction, in order to prevent ground deformation, collapse and instability, it is necessary to reinforce the strata. The main measure adopted is to bury anchor rods with anchor heads in the strata. By injecting cement into the anchor holes, the anchor rods are integrated with the strata, so that the strata form an integral structure.

[0003] Traditional anchoring self-drilling bits are prone to shifting or tilting during drilling. Furthermore, because the anchor rod is relatively thin, it must be drilled to a greater depth to obtain a longer anchor body and achieve a better anchoring effect. However, the deeper the drilling, the greater the possibility and degree of tilting.

[0004] According to patent application CN202210032447.1, an anchoring structure for civil engineering construction includes an installation mechanism. The installation mechanism includes an external connector and a sliding groove. After the anchor is inserted, the limiting rod is pulled upwards to remove the plug from the insertion hole, thus removing the limiting effect of the plug on the anchor tip. This allows the elastic element on the guide plate to push the anchor tip outwards, and the outer sides of the four sets of anchor tips to contact the inner wall of the anchor hole, supporting the anchor within the anchor hole and ensuring that the anchor is always positioned along the axis of the anchor hole. This design prevents skew after the anchor is inserted into the anchor hole, solving the problem of insufficient structure for correcting the anchor's position within the anchor hole, which often leads to skewed anchor heads when the anchor is inserted into the bottom of the anchor hole, resulting in substandard installation of the anchor after cement pouring.

[0005] However, the aforementioned equipment is too complex in structure, difficult to manufacture, and has a high production cost, making it difficult to apply in actual engineering construction. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an anchoring device for civil engineering construction. The purpose is to solve the technical problem mentioned in the background art, where the anchor head is prone to skew when the anchor rod is inserted into the bottom of the anchor hole, resulting in unqualified installation of the anchor rod after cement pouring.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an anchoring device for civil engineering construction, comprising a nut, a washer, and a grout stopper. The nut is threadedly connected to the upper part of a hollow anchor rod. The washer is fitted below the nut and above the hollow anchor rod. The grout stopper is fitted below the washer and above the hollow anchor rod. An alloy drill bit is provided at the lower end of the hollow anchor rod. Multiple threaded pins are provided on the upper part of the alloy drill bit. An expansion mechanism is threadedly connected to the lower part of the hollow anchor rod and the upper part of the alloy drill bit.

[0008] Furthermore, the hollow anchor rod has an external thread on its outer side, and the two ends of the hollow anchor rod are respectively provided with snap-fit ​​grooves, and the interior of the multiple snap-fit ​​grooves is provided with snap-fit ​​limiting internal threads.

[0009] Furthermore, the bottom surface of the alloy drill bit is provided with multiple drill edges, the middle part of the alloy drill bit is provided with a slurry channel, the slurry channel is provided with slurry outlets around its perimeter, the inner sides of the slurry channel are provided with drill bit limiting pin grooves, the inner sides of the multiple drill bit limiting pin grooves are provided with drill bit pin internal threads, and the upper outer side of the alloy drill bit is provided with reverse external threads.

[0010] Furthermore, one side of the drill bit is provided with multiple ball teeth.

[0011] Furthermore, the expansion mechanism includes an expansion bracket, which is sleeved and connected to the lower part of the hollow anchor rod. The lower end of the expansion bracket is threadedly connected to the upper part of the alloy drill bit. An expansion movable block is slidably connected to the middle part of the expansion bracket. The expansion movable block is threadedly connected to the lower part of the hollow anchor rod. Expansion units are rotatably connected to the upper periphery of the expansion movable block.

[0012] Furthermore, the expansion bracket includes an expansion base, the middle part of which is sleeved on the lower part of the hollow anchor rod. The expansion base has a reverse internal thread inside, and the top surface of the expansion base is provided with a plurality of expansion sliding limit support rods. The upper ends of the plurality of expansion sliding limit support rods are all located on the bottom surface of the upper support block, and the upper support block is sleeved on the middle part of the hollow anchor rod.

[0013] Furthermore, the middle part of the expansion movable block is provided with an anchor rod internal thread, which is threaded to the middle part of the hollow anchor rod. Multiple sliding limit grooves are opened on the outer side of the expansion movable block, and the multiple sliding limit grooves are respectively slidably connected to the expansion sliding limit support rod. Expansion rotating shafts are respectively provided on the outer side of the expansion movable block and between the multiple sliding limit grooves, and the multiple expansion rotating shafts are respectively rotatably connected to the expansion unit.

[0014] Furthermore, the expansion unit includes an expansion insert plate with a pointed lower end. Multiple grooves are provided on one side of the expansion insert plate, and an expansion rotating connecting block is provided at the upper end of the expansion insert plate. The expansion rotating connecting block is rotatably connected to the expansion shaft. A tension spring fixing block is provided in the middle of the other side of the expansion insert plate. The middle of the tension spring fixing block is located at one end of a tension spring, and the other end of the tension spring is located on the bottom surface of the expansion movable block.

[0015] Furthermore, the multiple hollow anchor rods are connected end to end by a connecting sleeve, and multiple threaded pins are respectively provided on both sides of the connecting sleeve.

[0016] Furthermore, sleeve limiting pin grooves are respectively opened on both sides of the connecting sleeve, and sleeve pin internal threads are respectively provided on the inner side of the multiple sleeve limiting pin grooves.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The anchor rod is connected by a threaded pin with a snap-fit ​​groove instead of the traditional threaded connection method. This allows the drill bit to rotate in both directions by the drilling rig. The expansion mechanism, controlled by the bidirectional rotation, loosens and inserts holes in the soil around the anchor rod. After grouting, a claw-shaped anchor body with a larger volume and a larger anchoring area is formed, thereby reducing the drilling depth of the anchor rod. This fundamentally solves the problem of anchor head skewness and greatly improves the construction qualification rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance and structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the appearance and structure of the present invention. Figure 2 ;

[0021] Figure 3 This is an exploded view of the internal structure of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of the hollow anchor structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the alloy drill bit structure of the present invention;

[0024] Figure 6 This is a cross-sectional view of the alloy drill bit structure of the present invention. Figure 1 ;

[0025] Figure 7 This is a cross-sectional view of the alloy drill bit structure of the present invention. Figure 2 ;

[0026] Figure 8This is a schematic diagram of the expansion mechanism structure of the present invention;

[0027] Figure 9 This is an exploded view of the expansion mechanism structure of the present invention;

[0028] Figure 10 This is a cross-sectional schematic diagram of the expanded support structure of the present invention;

[0029] Figure 11 This is a schematic diagram of the expanded movable block structure of the present invention;

[0030] Figure 12 This is a schematic diagram of the expanded unit structure of the present invention. Figure 1 ;

[0031] Figure 13 This is a schematic diagram of the expanded unit structure of the present invention. Figure 2 ;

[0032] Figure 14 This is a cross-sectional schematic diagram of the connecting sleeve structure of the present invention.

[0033] In the diagram: 1. Nut; 2. Washer; 3. Grout stopper; 4. Hollow anchor bolt; 41. Anchor bolt external thread; 42. Snap-fit ​​groove; 43. Snap-fit ​​limiting internal thread; 5. Alloy drill bit; 51. Drill bit; 511. Ball tooth; 52. Mortar channel; 53. Mortar outlet; 54. Drill bit limiting pin groove; 55. Drill bit pin internal thread; 56. Reverse external thread; 6. Threaded pin; 7. Expansion mechanism; 71. Expansion bracket; 711. Expansion base; 71 2. Reverse internal thread; 713. Expanding sliding limit support rod; 714. Upper support block; 72. Expanding movable block; 721. Anchor rod internal thread; 722. Sliding limit groove; 723. Expanding shaft; 73. Expanding unit; 731. Expanding insert plate; 732. Groove; 733. Expanding rotating connecting block; 734. Tension spring fixing block; 735. Tension spring; 8. Connecting sleeve; 81. Sleeve limit pin groove; 82. Sleeve pin internal thread. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Please refer to the following examples. Figure 1-3 An anchoring device for civil engineering construction includes a nut 1, a washer 2, and a grout stopper 3. The nut 1 is threadedly connected to the upper part of a hollow anchor rod 4. The washer 2 is fitted below the nut 1 and above the hollow anchor rod 4. The grout stopper 3 is fitted below the washer 2 and above the hollow anchor rod 4. An alloy drill bit 5 is provided at the lower end of the hollow anchor rod 4. Multiple threaded pins 6 are provided at the upper part of the alloy drill bit 5. An expansion mechanism 7 is threadedly connected to the lower part of the hollow anchor rod 4 and the upper part of the alloy drill bit 5.

[0038] Please refer to the following examples. Figure 4 The hollow anchor rod 4 has an external thread 41 on its outer side, and a snap-fit ​​groove 42 is provided on both sides of the two ends of the hollow anchor rod 4. The snap-fit ​​groove 42 is provided with a snap-fit ​​limiting internal thread 43 inside. This design achieves snap-fit ​​by using the snap-fit ​​groove 42 in conjunction with the threaded pin 6.

[0039] Please refer to the following examples. Figure 5-7 The bottom surface of the alloy drill bit 5 is provided with multiple drill edges 51. A mortar channel 52 is opened in the middle of the alloy drill bit 5. Mortar outlets 53 are opened around the mortar channel 52. Drill bit limiting pin grooves 54 are opened on both sides of the interior of the mortar channel 52. Drill bit pin internal threads 55 are provided on the inner side of the multiple drill bit limiting pin grooves 54. The upper outer side of the alloy drill bit 5 is provided with reverse external threads 56. This design accelerates the self-drilling speed through multiple drill edges 51 and injects cement mortar into the drilled hole through the mortar outlets 53.

[0040] Please refer to the following examples. Figure 7 The drill bit 51 has multiple ball teeth 511 on one side. This design enhances the crushing effect of the drill bit through multiple ball teeth 511.

[0041] Please refer to the following examples. Figure 8-9 The expansion mechanism 7 includes an expansion bracket 71, which is sleeved and connected to the lower part of the hollow anchor rod 4. The lower end of the expansion bracket 71 is threaded to the upper part of the alloy drill bit 5. An expansion movable block 72 is slidably connected to the middle part of the expansion bracket 71. The expansion movable block 72 is threaded to the lower part of the hollow anchor rod 4. Expansion units 73 are rotatably connected to the upper periphery of the expansion movable block 72. This design drives multiple expansion units 73 to move by the expansion movable block 72 sliding in the middle of the expansion bracket 71. When the expansion movable block 72 moves downward, it expands the multiple expansion units 73 through the lower part of the expansion bracket 71 to achieve the expansion action. When the expansion movable block 72 moves upward, the multiple expansion units 73 automatically tighten.

[0042] Please refer to the following examples. Figure 10 The expansion bracket 71 includes an expansion base 711, the middle of which is fitted onto the lower part of the hollow anchor rod 4. The expansion base 711 has a reverse internal thread 712 inside. The top surface of the expansion base 711 is provided with multiple expansion sliding limit support rods 713. The upper ends of the multiple expansion sliding limit support rods 713 are all located on the bottom surface of the upper support block 714. The upper support block 714 is fitted onto the middle part of the hollow anchor rod 4. This design uses the sloped top surface of the expansion base 711 to cooperate with multiple expansion units 73 to achieve expansion. When the alloy drill bit 5 rotates forward, the expansion base 711 and the alloy drill bit 5 are tightly connected through the reverse internal thread 712, and the expansion bracket 71 rotates with the alloy drill bit 5. When the alloy drill bit 5 rotates in reverse, the expansion base 711 and the alloy drill bit 5 are released, and the expansion bracket 71 does not rotate with the alloy drill bit 5.

[0043] Please refer to the following examples. Figure 11 The expansion block 72 has an anchor rod internal thread 721 in the middle, which is threaded to the middle of the hollow anchor rod 4. The expansion block 72 has multiple sliding limit grooves 722 on its outer side, which are slidably connected to the expansion sliding limit support rod 713. An expansion shaft 723 is provided on the outer side of the expansion block 72 and between the multiple sliding limit grooves 722. The expansion shaft 723 is rotatably connected to the expansion unit 73. This design, through the threaded engagement of the anchor rod internal thread 721 with the hollow anchor rod 4, pushes the expansion block 72 to slide downward along the expansion sliding limit support rod 713 when the expansion bracket 71 does not rotate with the alloy drill bit 5, thereby driving the multiple expansion units 73 to move downward.

[0044] Please refer to the following examples. Figure 12-13The expansion unit 73 includes an expansion insert 731 with a pointed lower end. Multiple grooves 732 are formed on one side of the expansion insert 731. An expansion rotating connecting block 733 is provided at the upper end of the expansion insert 731, rotatably connecting the expansion shaft 723. A tension spring fixing block 734 is provided in the middle of the other side of the expansion insert 731. The middle of the tension spring fixing block 734 is located at one end of a tension spring 735, and the other end of the tension spring 735 is located on the bottom surface of the expansion movable block 72. This design allows the expansion insert 731 with its pointed lower end to be easily inserted into the soil. After insertion, external air enters through the multiple grooves 732, reducing negative pressure and facilitating the removal of the expansion insert 731. The tension spring 735 pulls the expansion insert 731 back when the expansion unit 73 moves upward.

[0045] Please refer to the following examples. Figure 1-3 Multiple hollow anchor rods 4 are connected end to end by connecting sleeves 8, and multiple threaded pins 6 are provided on both sides of the connecting sleeves 8.

[0046] Please refer to the following examples. Figure 14 The connecting sleeve 8 has sleeve limiting pin grooves 81 on both sides of its two ends. The inner side of the multiple sleeve limiting pin grooves 81 is provided with sleeve pin internal threads 82. This design connects multiple hollow anchor rods 4 end to end by screwing multiple threaded pins 6 into the sleeve pin internal threads 82 in the sleeve limiting pin grooves 81 and the snap-fit ​​limiting internal threads 43 in the snap-fit ​​grooves 42.

[0047] Operating principle:

[0048] First, the expansion mechanism 7 is installed on the upper part of the alloy drill bit 5 by using the reverse external thread 56 and the reverse internal thread 712. One end of the hollow anchor rod 4 is screwed into the expansion mechanism 7. Two threaded pins 6 are screwed into the drill bit pin internal thread 55 in the drill bit limiting pin groove 54 and the snap-fit ​​limiting internal thread 43 in the snap-fit ​​groove 42 in sequence, thereby installing the alloy drill bit 5 on one end of the hollow anchor rod 4. The other end of the assembled hollow anchor rod 4 is placed at the output end of the drilling rig. The drilling rig is started to rotate forward and advance into the soil layer.

[0049] When a single hollow anchor rod 4 is drilled into place, the drilling rig reverses and stops advancing. The expansion base 711 and the alloy drill bit 5 are released, and the expansion bracket 71 does not rotate with the alloy drill bit 5. The internal thread 721 of the anchor rod is threadedly engaged with the hollow anchor rod 4. When the hollow anchor rod 4 reverses and the expansion bracket 71 does not rotate with the alloy drill bit 5, the expansion movable block 72 is pushed to slide downward along the expansion sliding limit support rod 713, thereby driving multiple expansion units 73 to move downward. The top surface of the expansion base 711 is sloping around its perimeter, thus cooperating with multiple expansion units 73 to achieve expansion. The expansion insert plate 731 with a sharp lower end can be easily inserted into the soil layer to loosen and insert holes in the surrounding soil layer.

[0050] When the drilling rig rotates forward without advancing, the internal thread 721 of the anchor rod engages with the thread of the hollow anchor rod 4. When the hollow anchor rod 4 rotates forward and the expansion bracket 71 does not rotate with the alloy drill bit 5, the expansion movable block 72 is pushed to slide upward along the expansion sliding limit support rod 713, thereby driving multiple expansion units 73 to move upward. External air is allowed to enter through multiple grooves 732 to reduce the generation of negative pressure and facilitate the removal of the expansion insert plate 731. When the expansion unit 73 moves upward, the tension spring 735 pulls the expansion insert plate 731 back tight. When the alloy drill bit 5 rotates forward, the expansion base 711 and the alloy drill bit 5 are tightly connected through the reverse internal thread 712, and the expansion bracket 71 continues to rotate with the alloy drill bit 5.

[0051] If further drilling is required, the next hollow anchor rod 4 is connected by sequentially screwing multiple threaded pins 6 into the sleeve pin internal thread 82 in the sleeve limiting pin groove 81 and the snap-fit ​​limiting internal thread 43 in the snap-fit ​​groove 42. Then, the above steps are repeated. Finally, cement mortar is injected into the hollow anchor rod 4 to fill the space loosened by the drilling and expansion mechanism 7 and the insertion hole. After solidification, a claw-shaped anchor body is formed, which greatly improves the anchoring effect. Finally, the nut 1, washer 2 and grout stop plug 3 are installed to complete the process.

[0052] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. An anchoring device for civil engineering construction, comprising a nut (1), a washer (2), and a grout stopper (3), characterized in that: The nut (1) is threaded to the upper part of the hollow anchor rod (4). Below the nut (1), the pad (2) is sleeved on the upper part of the hollow anchor rod (4). Below the pad (2), the grout stop plug (3) is sleeved on the upper part of the hollow anchor rod (4). The lower end of the hollow anchor rod (4) is provided with an alloy drill bit (5). The upper part of the alloy drill bit (5) is provided with multiple threaded pins (6). The lower part of the hollow anchor rod (4) and the upper part of the alloy drill bit (5) are threadedly connected to an expansion mechanism (7). The alloy drill bit (5) has a mortar channel (52) in the middle, and mortar outlets (53) are provided around the mortar channel (52). Drill bit limiting pin grooves (54) are provided on both sides of the interior of the mortar channel (52). Drill bit pin internal threads (55) are provided on the inner side of the plurality of drill bit limiting pin grooves (54). The upper outer side of the alloy drill bit (5) is provided with reverse external threads (56). The expansion mechanism (7) includes an expansion bracket (71), which is sleeved and connected to the lower part of the hollow anchor rod (4). The lower end of the expansion bracket (71) is threaded to the upper part of the alloy drill bit (5). The middle part of the expansion bracket (71) is slidably connected to an expansion movable block (72), which is threaded to the lower part of the hollow anchor rod (4). The upper part of the expansion movable block (72) is rotatably connected to expansion units (73) on all four sides. The expansion bracket (71) includes an expansion base (711), the middle part of which is sleeved on the lower part of the hollow anchor rod (4). The expansion base (711) has a reverse internal thread (712) inside. The top surface of the expansion base (711) is provided with multiple expansion sliding limit support rods (713). The upper ends of the multiple expansion sliding limit support rods (713) are all located on the bottom surface of the upper support block (714). The upper support block (714) is sleeved on the middle part of the hollow anchor rod (4). The top surface of the expansion base (711) is sloped around its perimeter. The expansion block (72) has an internal anchor thread (721) in the middle, and the internal anchor thread (721) is threaded to the middle of the hollow anchor (4).

2. The anchoring device for civil engineering construction according to claim 1, characterized in that: The hollow anchor rod (4) has an external thread (41) on its outer side, and a snap-fit ​​groove (42) is provided on both sides of both ends of the hollow anchor rod (4). The snap-fit ​​groove (42) is provided with a snap-fit ​​limiting internal thread (43) inside each of the multiple snap-fit ​​grooves (42).

3. The anchoring device for civil engineering construction according to claim 1, characterized in that: The bottom surface of the alloy drill bit (5) is provided with multiple drill bits (51).

4. The anchoring device for civil engineering construction according to claim 3, characterized in that: The drill bit (51) has multiple ball teeth (511) on one side.

5. The anchoring device for civil engineering construction according to claim 1, characterized in that: The outer side of the expansion movable block (72) is provided with multiple sliding limit grooves (722), and the multiple sliding limit grooves (722) are respectively slidably connected to the expansion sliding limit support rod (713). The outer side of the expansion movable block (72) and between the multiple sliding limit grooves (722) are respectively provided with expansion rotating shafts (723), and the multiple expansion rotating shafts (723) are respectively rotatably connected to the expansion unit (73).

6. The anchoring device for civil engineering construction according to claim 5, characterized in that: The expansion unit (73) includes an expansion insert plate (731), the lower end of which is sharp. Multiple grooves (732) are provided on one side of the expansion insert plate (731). An expansion rotating connecting block (733) is provided at the upper end of the expansion insert plate (731). The expansion rotating connecting block (733) is rotatably connected to the expansion shaft (723). A tension spring fixing block (734) is provided in the middle of the other side of the expansion insert plate (731). The middle of the tension spring fixing block (734) is located at one end of a tension spring (735), and the other end of the tension spring (735) is located on the bottom surface of the expansion movable block (72).

7. The anchoring device for civil engineering construction according to claim 1, characterized in that: Multiple hollow anchor rods (4) are connected end to end by connecting sleeves (8), and multiple threaded pins (6) are provided on both sides of the connecting sleeves (8).

8. The anchoring device for civil engineering construction according to claim 7, characterized in that: The connecting sleeve (8) has sleeve limiting pin grooves (81) on both sides of its two ends, and the inner side of the multiple sleeve limiting pin grooves (81) is provided with sleeve pin internal threads (82).

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