Hollow anchor rod pull-out-free secondary grouting device

Abstract

The utility model relates to grouting equipment technical field discloses a hollow anchor rod is exempted from to pull out pipe secondary grouting device, including the rod body and the anchor head, the rod body is hollow and its inside bottom rotatoryly connected with one end extends to the hollow rotating rod of outside, the hollow rotating rod side surface is connected with the blanking sealing plate of the cavity in the rod body adaptation with the thread, the anchor head side surface is opened to have a plurality of first grouting mouth and second grouting mouth, a plurality of first grouting mouth and a plurality of second grouting mouth arrangement direction are same with the rod body length, first grouting mouth and second grouting mouth all are equipped with the first sealing plate with the sealed effect in, the first grouting mouth or the second grouting mouth inboard wall all are opened to have the first through -hole with the rod body intercommunication, first grouting mouth or second grouting mouth inboard wall and its corresponding first sealing plate side surface between all are fixedly installed with first spring. In the utility model, realize the effect that exempted from to pull out pipe completes secondary grouting, improve the efficiency when secondary grouting, reduce the overall construction cost.

Description

Technical Field

[0001] This utility model relates to the field of grouting equipment technology, specifically to a hollow anchor rod secondary grouting device that does not require pipe pulling. Background Technology

[0002] In the construction of tunnels, slopes, and underground caverns, hollow anchor grouting support is a common and important method for reinforcing surrounding rock. By injecting grout into the hollow anchor, the grout can fill the cracks in the surrounding rock, improve the integrity and stability of the surrounding rock, and thus effectively ensure the safe construction and long-term stability of the project.

[0003] Currently, conventional grouting methods have many problems in the construction of hollow anchor bolts. Under some complex geological conditions, such as uneven development of surrounding rock fissures or the presence of fault fracture zones, a single grouting often fails to achieve the desired reinforcement effect, thus requiring secondary grouting. Existing technologies often require pulling out the grouting pipe used in the initial grouting and then re-inserting a new grouting pipe for secondary grouting. This method of pulling out and re-inserting the pipe has several drawbacks. First, the grouting slurry is easily disturbed during the pipe pulling process, damaging the slurry stone structure formed in the initial grouting and affecting the overall grouting reinforcement effect. Second, the re-insertion operation not only increases the complexity of the construction process, prolongs the construction time, reduces construction efficiency, but also increases construction costs. Moreover, since the working space of underground engineering projects such as tunnels is usually narrow and the construction environment is complex, the operation of pulling out and re-inserting the pipe is difficult and can easily lead to construction safety hazards. Therefore, there is an urgent need in this field to improve the grouting device to overcome the shortcomings of the existing technology. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hollow anchor bolt secondary grouting device that eliminates the need for pipe removal, thereby achieving secondary grouting without pipe removal, improving efficiency during secondary grouting, and reducing overall construction costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hollow anchor rod secondary grouting device without pipe pulling, comprising a rod body and an anchor head disposed at the end of the rod body. The rod body is hollow, and a hollow rotating rod extending to the outside is rotatably connected to its bottom. A sealing plate adapted to the hollow cavity inside the rod body is threadedly connected to the side of the hollow rotating rod. A plurality of first grouting ports and second grouting ports are provided through the side of the anchor head. The plurality of first grouting ports and the plurality of second grouting ports are arranged in the same direction as the length of the rod body. The first grouting ports and the second grouting ports are filled with... Each is equipped with a first sealing plate with a sealing effect. The inner walls of the first and second grouting ports are provided with a first through hole that communicates with the rod body. A first spring is fixedly installed between the inner wall of the first or second grouting port and the side of the corresponding first sealing plate. The hollow rotating rod is hollow inside. Several third and fourth grouting ports that are adapted to the first and second grouting ports are opened through the side of the hollow rotating rod. When the sealing plate moves between the first and second grouting ports, it completely covers several fourth grouting ports.

[0006] Preferably, both the third and fourth grouting ports are provided with a second sealing plate adapted to the sealing plate, and the inner walls of both the third and fourth grouting ports are provided with a second through hole communicating with the hollow rotating rod. A second spring is fixedly installed between the inner wall of the third or fourth grouting port and the side of the second sealing plate.

[0007] Preferably, the first grouting port, the second grouting port, the third grouting port and the fourth grouting port are all funnel-shaped.

[0008] Preferably, an elastic grout-stopping ring is fitted at the end of the rod away from the anchor head, and a pad that abuts against and fits one side of the grout-stopping ring is fitted on the side of the end of the rod away from the anchor head. A limit nut is threadedly connected to the end of the rod away from the anchor head.

[0009] Preferably, a positioning plate is provided at the end of the rod away from the anchor head, the hollow rotating rod passes through the positioning plate, and the inner wall of the limiting nut abuts against one side of the positioning plate.

[0010] Preferably, the sealing plate has several limiting blocks on its side, and the inner wall of the rod has a limiting groove that matches the limiting blocks. The side of the positioning plate matches the limiting groove, and the limiting groove passes through the end of the rod away from the anchor head.

[0011] Preferably, the hollow rotating rod has a grouting connection port at one end extending to the outside for connecting to a grouting machine.

[0012] Preferably, the inner wall of the sealing plate is provided with a guide bevel that matches the second sealing plate.

[0013] To address the shortcomings of existing technologies, this utility model provides a hollow anchor bolt secondary grouting device that eliminates the need for pipe pulling, overcoming the deficiencies of existing technologies. The beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, by setting a first grouting port and a second grouting port, rotating the hollow rotating rod drives the sealing plate to completely cover several fourth grouting ports. Grouting is performed through the third grouting port and the first grouting port to complete the first grouting. During the second grouting, rotating the hollow rotating rod drives the sealing plate to move, exposing the fourth grouting ports. The second grouting is then completed through the fourth grouting ports and the first grouting port, achieving the effect of completing the second grouting without pulling the pipe, improving the efficiency of the second grouting and reducing the overall construction cost.

[0015] 2. In this utility model, the second sealing plate is pulled by the second spring, and the third and fourth grouting ports are funnel-shaped. The second sealing plate seals the third or fourth grouting port. The first sealing plate is pulled by the first spring in the first and second grouting ports, and the first and second grouting ports are funnel-shaped. The first sealing plate seals the first or second grouting port, preventing a large amount of foreign matter from entering the rod body or hollow rotating rod during the installation of the anchor rod, and reducing the probability of blockage during grouting.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the overall rear structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the present invention.

[0020] Figure 3 This is a structural schematic diagram showing another axial cross-section of the present invention;

[0021] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 for Figure 2 Enlarged structural diagram at point B;

[0023] Figure 6 for Figure 3 Enlarged structural diagram at point C;

[0024] Figure 7 for Figure 3 Enlarged structural diagram at point D.

[0025] In the diagram: 1. Rod body; 2. Anchor head; 3. Hollow rotating rod; 4. Sealing plate; 5. First grouting port; 6. Second grouting port; 7. First sealing plate; 8. First through hole; 9. First spring; 10. Third grouting port; 11. Fourth grouting port; 12. Second sealing plate; 13. Second through hole; 14. Second spring; 15. Grout stop ring; 16. Pad; 17. Limiting nut; 18. Positioning plate; 19. Limiting block; 20. Limiting groove; 21. Grouting connection port; 22. Guide bevel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-7A hollow anchor bolt secondary grouting device without pipe pulling includes a rod body 1 and an anchor head 2 located at the end of the rod body 1. The rod body 1 is hollow, and a hollow rotating rod 3 extending to the outside is rotatably connected to its bottom. A sealing plate 4 adapted to the cavity inside the rod body 1 is threadedly connected to the side of the hollow rotating rod 3. A plurality of first grouting ports 5 and second grouting ports 6 are provided through the side of the anchor head 2. The plurality of first grouting ports 5 and the plurality of second grouting ports 6 are arranged in the same direction as the length of the rod body 1. A first sealing plate 7 with a sealing effect is provided in both the first grouting ports 5 and the second grouting ports 6. The inner wall of each of the two parts is provided with a first through hole 8 communicating with the inside of the rod body 1. A first spring 9 is fixedly installed between the inner wall of the first grouting port 5 or the second grouting port 6 and the side of the corresponding first sealing plate 7. The hollow rotating rod 3 is hollow inside. Several third grouting ports 10 and fourth grouting ports 11 are respectively adapted to the first grouting port 5 and the second grouting port 6. When the sealing plate 4 moves between the first grouting port 5 and the second grouting port 6, it completely covers several fourth grouting ports 11. The third grouting ports 10 and the fourth grouting ports 11 are each provided with a second seal adapted to the sealing plate 4. The inner walls of plate 12, the third grouting port 10, and the fourth grouting port 11 are all provided with a second through hole 13 that communicates with the hollow rotating rod 3. A second spring 14 is fixedly installed between the inner wall of the third grouting port 10 or the fourth grouting port 11 and the side of the second sealing plate 12. The hollow rotating rod 3 has a grouting connection port 21 for connecting to the grouting machine at one end extending to the outside. The first grouting port 5, the second grouting port 6, the third grouting port 10, and the fourth grouting port 11 are all funnel-shaped. An elastic grout-stopping ring 15 is fitted on the end of the rod body 1 away from the anchor head 2. A grout-stopping ring 15 is fitted on the side of the end of the rod body 1 away from the anchor head 2. A pad 16 is fitted and abuts against one side of ring 15. A limit nut 17 is threadedly connected to the end of rod 1 away from anchor head 2. A positioning plate 18 is provided inside the end of rod 1 away from anchor head 2. A hollow rotating rod 3 passes through the positioning plate 18. The inner wall of the limit nut 17 abuts against one side of the positioning plate 18. Several limit blocks 19 are provided on the side of sealing plate 4. A limit groove 20 that fits the limit block 19 is opened on the inner wall of rod 1. The side of positioning plate 18 fits the limit groove 20. The limit groove 20 passes through the end of rod 1 away from anchor head 2. A guide angle 22 that fits the second sealing plate 12 is opened on the inner wall of sealing plate 4.

[0028] In this specific embodiment, before installing the hollow anchor rod, the sealing plate 4 is adjusted. The sealing plate 4 is located between the first grouting port 5 and the second grouting port 6, and the sealing plate 4 completely covers several fourth grouting ports 11. Using professional equipment and with the anchor head 2, the hollow anchor rod is installed in the designated position, with one end of the rod body 1 exposed on the surface of the reinforced base layer. The grout-stopping ring 15 is fitted onto the side of one end of the rod body 1. The grout-stopping ring 15 is elastic and trumpet-shaped, and it is snapped into the end of the anchor hole. The pad 16 is fitted onto the side of the rod body 1. The pad 16 is larger than the anchor hole, and the grout-stopping ring 15 and the pad 16 are provided with vent holes. At the same time, the positioning plate 18 is snapped into the rod body 1 to limit the hollow rotating rod 3. Nut 17 is threaded onto the end of rod 1. Nut 17 limits and positions the pad 16 and positioning plate 18. Positioning plate 18 is fitted with limiting grooves 20 on both sides, limiting its position. When grouting is required, grouting equipment is connected to grouting connection port 21. Grouting is performed through grouting connection port 21. The grout enters the hollow rotating rod 3 and passes through several second through holes 13 in the third grouting port 10. The grout pushes the second sealing plate 12 in the third grouting port 10 to move. The grout enters the rod 1 and is located on the side of the sealing plate 4 away from the grouting connection port 21. Subsequently, the grout passes through the first through holes 8 in several second grouting ports 6, pushing the first sealing plate 7 in the second grouting ports 6 to move. The process involves grouting the anchor hole. After grouting, any residual grout in the hollow rotating rod 3 is cleaned. Once the initial grout has set, the hollow rotating rod 3 is rotated. As the rod rotates, it drives the sealing plate 4 to move within the rod body 1. The sealing plate 4 moves upward or downward, and the guide angle 22 presses against the second sealing plate 12 in the third grouting port 10. If it cannot rotate, it rotates in the opposite direction, causing the sealing plate 4 to move upward. When the sealing plate 4 moves, the limiting block 19 moves in the limiting groove 20 to limit the sealing plate 4. Grouting continues through the grouting connection port 21. The grout passes through the second through hole 13 in the fourth grouting port 11 and then through the first grouting port 5 for secondary grouting. During the secondary grouting, there is no... The grouting pipe needs to be pulled out to improve the efficiency of secondary grouting and reduce the overall construction cost. At the same time, the second sealing plate 12 is pulled by the second spring 14, and the third grouting port 10 and the fourth grouting port 11 are funnel-shaped. The second sealing plate 12 seals the third grouting port 10 or the fourth grouting port 11. The first sealing plate 7 is pulled by the first spring 9 in the first grouting port 5 and the second grouting port 6. The first sealing plate 7 seals the first grouting port 5 or the second grouting port 6 to prevent a large amount of foreign matter from entering the rod body 1 or the hollow rotating rod 3 when installing the anchor rod, and reduce the probability of blockage during grouting. The first sealing plate 7 and the second sealing plate 12 have a certain degree of elasticity.

[0029] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hollow anchor bolt secondary grouting device without pipe pulling, comprising a bolt body (1) and an anchor head (2) disposed at the end of the bolt body (1), characterized in that, The rod body (1) is hollow and has a hollow rotating rod (3) with one end extending to the outside rotatably connected to its bottom. The hollow rotating rod (3) has a sealing plate (4) threaded to its side that is compatible with the cavity inside the rod body (1). The anchor head (2) has several first grouting ports (5) and second grouting ports (6) through it. The arrangement of the first grouting ports (5) and the second grouting ports (6) is the same as the length of the rod body (1). The first grouting ports (5) and the second grouting ports (6) are each provided with a first sealing plate (7) that has a sealing effect. The first grouting ports (5) and the second grouting ports (6) are provided with a first sealing plate (7) that has a sealing effect. Each side wall is provided with a first through hole (8) communicating with the inside of the rod body (1). A first spring (9) is fixedly installed between the inner side wall of the first grouting port (5) or the second grouting port (6) and the side of the corresponding first sealing plate (7). The hollow rotating rod (3) is hollow. Several third grouting ports (10) and fourth grouting ports (11) are provided through the side of the hollow rotating rod (3) respectively, which are adapted to the first grouting port (5) and the second grouting port (6). When the sealing plate (4) moves between the first grouting port (5) and the second grouting port (6), it completely covers several fourth grouting ports (11).

2. The hollow anchor bolt secondary grouting device without pipe pulling according to claim 1, characterized in that, Both the third grouting port (10) and the fourth grouting port (11) are provided with a second sealing plate (12) that is compatible with the sealing plate (4). The inner walls of the third grouting port (10) and the fourth grouting port (11) are provided with a second through hole (13) that communicates with the hollow rotating rod (3). A second spring (14) is fixedly installed between the inner wall of the third grouting port (10) or the fourth grouting port (11) and the side of the second sealing plate (12).

3. The hollow anchor bolt secondary grouting device without pipe pulling according to claim 1, characterized in that, The first grouting port (5), the second grouting port (6), the third grouting port (10), and the fourth grouting port (11) are all funnel-shaped.

4. The hollow anchor bolt secondary grouting device without pipe pulling according to claim 1, characterized in that, The end of the rod (1) away from the anchor head (2) is fitted with an elastic grout stop ring (15), and the side of the end of the rod (1) away from the anchor head (2) is fitted with a pad (16) that abuts against and fits one side of the grout stop ring (15). The end of the rod (1) away from the anchor head (2) is threaded with a limit nut (17).

5. A hollow anchor bolt secondary grouting device without pipe pulling as described in claim 4, characterized in that, A positioning plate (18) is provided at the end of the rod (1) away from the anchor head (2). A hollow rotating rod (3) passes through the positioning plate (18). The inner wall of the limiting nut (17) abuts against one side of the positioning plate (18).

6. A hollow anchor bolt secondary grouting device without pipe pulling as described in claim 5, characterized in that, The sealing plate (4) has several limiting blocks (19) on its side. The inner wall of the rod (1) has a limiting groove (20) that matches the limiting blocks (19). The side of the positioning plate (18) matches the limiting groove (20). The limiting groove (20) passes through the end of the rod (1) away from the anchor head (2).

7. A hollow anchor bolt secondary grouting device without pipe pulling as described in claim 1, characterized in that, The hollow rotating rod (3) has a grouting connection port (21) at one end extending to the outside for connecting to the grouting machine.

8. A hollow anchor bolt secondary grouting device without pipe pulling as described in claim 1, characterized in that, The inner wall of the sealing plate (4) is provided with a guide angle (22) that is compatible with the second sealing plate (12).

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