Device for removing slag in pre-stressed anchor cable hole

Abstract

The utility model discloses a pre-stressed anchor cable in-hole slag removal device which comprises a drill rod and a blowback device which are coaxially connected, a through air supply channel is arranged in the drill rod, the blowback device comprises a conical head, a first guide cylinder and a second guide cylinder which are sequentially connected in the axial direction, and the diameter of the first guide cylinder is larger than that of the second guide cylinder. One end of the second guide cylinder is fixedly connected with the drill rod, a plurality of connecting rods are evenly distributed on the outer wall of the other end of the second guide cylinder in the circumferential direction, the other ends of the connecting rods are fixedly connected with the inner wall of the first guide cylinder, and an annular gap between the first guide cylinder and the second guide cylinder forms an air outlet channel. The device is convenient to manufacture and install, more trouble-saving, labor-saving, cost-saving and labor-saving compared with a traditional hole cleaning method, good in slag cleaning effect, high in efficiency and capable of guaranteeing the anchor cable construction quality.

Description

Technical Field

[0001] This utility model relates to the field of anchor cable construction technology, specifically to a device for cleaning slag inside prestressed anchor cable holes. Background Technology

[0002] Drilling is a crucial step in the construction of anchor cables on high slopes. During drilling, strict control must be maintained over parameters such as hole diameter, inclination, and depth. Hole cleaning, as the final step in the anchor cable drilling process and an important step before grouting the anchor cable, is critical to the quality of the grouting in the anchoring section and whether the final tension of the anchor cable meets design requirements.

[0003] In actual construction, after drilling is completed, the following methods are commonly used to remove residue from the hole: 1. After drilling with a conventional drill rod, remove the drill bit. During the drill rod withdrawal process, use the air inlet in the middle of the drill rod to apply compressed air, blowing the residue at the bottom of the hole to the outside. Clean repeatedly along the direction from the bottom of the hole to the opening. 2. Replace the conventional drill rod with a spiral drill rod, using the threads of the spiral drill rod to carry away the residue from the hole.

[0004] However, since anchor cable construction involves deep support and deep drilling, these two methods are ineffective at removing slag and leave residual waste. This makes it difficult to guarantee the grouting quality of the anchoring section. It is necessary to repeatedly pull out the drill rod and insert it into the anchor cable hole to clean the hole, which is inefficient, time-consuming, and labor-intensive, and does not help to ensure the construction period. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a device for cleaning slag inside prestressed anchor cable holes.

[0006] A device for cleaning slag inside prestressed anchor cable holes includes a drill rod and a back-blowing device coaxially connected. The drill rod has a through air supply channel inside. The back-blowing device includes a conical head, a first guide cylinder, and a second guide cylinder connected in sequence along the axial direction. The diameter of the first guide cylinder is larger than that of the second guide cylinder. One end of the second guide cylinder is fixedly connected to the drill rod. Multiple connecting rods are evenly distributed around the outer wall of the other end of the second guide cylinder. The other end of the connecting rods is fixedly connected to the inner wall of the first guide cylinder. The annular gap between the first and second guide cylinders forms an air outlet channel.

[0007] A further technical solution is to set the width of the air outlet duct to 5-8cm.

[0008] A further technical solution is: several rows of inclined air outlet groups are provided on the side wall of the second guide tube, and the axis of the air outlet of each row of air outlet groups forms an acute angle with the axis of the second guide tube, and the air outlet direction is inclined from the side of the conical head to the side of the drill rod.

[0009] A further technical solution is: each air outlet group includes 2-6 air outlets evenly spaced along the circumference of the side wall of the second guide tube.

[0010] A further technical solution is that the angle between the axis of the air outlet and the axis of the second guide tube is 20°-60°.

[0011] A further technical solution is: an annular mounting plate is provided on the inner wall of the second guide tube near the drill rod, and multiple positioning plates are provided at equal intervals along the circumference of the outer wall of the drill rod, with the mounting plate and positioning plates welded together.

[0012] A further technical solution is: multiple reinforcing ribs are welded and fixed on the outer surface of the conical head, and the reinforcing ribs are distributed at equal intervals with the tip of the conical head as the center.

[0013] A further technical solution is that the diameter of the conical head is the same as the diameter of the first guide tube, and the conical head and the first guide tube are integrally formed or seamlessly welded.

[0014] The beneficial effects of this utility model are:

[0015] This invention relates to a device for quickly and efficiently removing debris from anchor cable holes. By incorporating a backflushing device and a drill rod, high-pressure airflow is delivered through an internal air supply channel in the drill rod. The backflushing device then redirects the airflow, causing it to exit through its annular outlet channel and inclined outlet holes, creating an airflow path from the bottom of the hole to the outside. This suspends the debris accumulated inside the hole and blows it out. By optimizing the airflow path through the outlet channel and outlet holes, this device significantly improves the efficiency and effectiveness of debris removal.

[0016] This utility model device is easy to manufacture and install. Compared with traditional hole cleaning methods, it is more convenient, labor-saving, cost-saving and manpower-saving. It also has a good cleaning effect and high efficiency, which can ensure the quality of anchor cable construction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the slag removal device inside the prestressed anchor cable hole.

[0018] Figure 2 This is a cross-sectional view of the slag removal device inside the prestressed anchor cable hole.

[0019] Figure 3 This is a cross-sectional view of the backflush device.

[0020] Figure 4 This is a schematic diagram of the gap between the first and second guide tubes.

[0021] In the picture:

[0022] 1. Drill rod; 11. Air supply channel; 2. Backflush device; 21. Conical head; 22. First guide tube; 23. Second guide tube; 24. Air outlet channel; 25. Air outlet hole; 26. Connecting rod; 27. Mounting plate; 3. Reinforcing rib; 4. Positioning plate. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation on the utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0026] A device for cleaning debris from prestressed anchor cable holes, such as Figure 1-4 As shown, the device includes a drill rod 1 and a backflush device 2 fixedly connected to one end of the drill rod 1. The drill rod 1 has a through air supply channel 11. The backflush device 2 includes a conical head 21, a first guide tube 22 and a second guide tube 23 arranged coaxially and connected in sequence. The diameter of the first guide tube 22 is larger than that of the second guide tube 23. One end of the second guide tube 23 is fixedly connected to the drill rod. Multiple connecting rods 26 are evenly distributed around the outer wall of the other end of the second guide tube 23. The other end of the connecting rod is fixedly connected to the inner wall of the first guide tube 22. The annular gap between the first guide tube 22 and the second guide tube 23 forms an air outlet channel 24.

[0027] The number of connecting rods 26 must be at least four. For example... Figure 4 As shown, four connecting rods 26 are arranged in a cross shape and welded and fixed between the first guide tube 22 and the second guide tube 23, ensuring a stable connection between the first guide tube 22 and the second guide tube 23 without affecting the air outlet effect at the air outlet channel 24. The width of the air outlet channel 24 is set to 5-8cm. The airflow is guided by the air outlet channel 24 to flow out evenly, thereby picking up and blowing out the residue in the anchor cable hole.

[0028] The side wall of the second guide tube 23 is provided with several rows of inclined air outlet groups. The axis of the air outlet 25 in each row of air outlet groups forms an acute angle with the axis of the second guide tube 23. The air outlet direction of the air outlet 25 is inclined from the side of the conical head 21 towards the side of the drill rod 1. Through the air outlet 25 provided on the side wall of the second guide tube 23, a part of the airflow can be guided to blow out laterally, which helps to clean the residue accumulated on the side wall of the anchor cable hole, sweeping it off and blowing it out along the hole wall.

[0029] The angle between the axis of the air outlet 25 and the axis of the second guide tube 23 is 20°-60°. Each air outlet group includes 2-6 air outlets 25 that are equally spaced along the circumference of the side wall of the second guide tube 23.

[0030] like Figure 3 As shown, an annular mounting plate 27 is provided on the inner wall of the second guide tube 23 near the drill rod 1, and multiple positioning plates 4 are provided at equal intervals along the circumference of the outer wall of the drill rod 1. The mounting plate 27 and the positioning plates 4 are welded and fixed together.

[0031] Multiple reinforcing ribs 3 are welded and fixed to the outer surface of the conical head 21. The reinforcing ribs 3 are evenly distributed with the tip of the conical head 21 as the center, which facilitates the insertion of the backflushing device 2 into the anchor cable hole. The conical head 21 and the first guide tube 22 are integrally formed or seamlessly welded.

[0032] After drilling is completed, all components of the device are installed. The head of drill rod 1 is connected to the backflushing device 2, and drill rod 1 is fixedly connected to the drilling rig. The tail of the drilling rig is connected to the air compressor via a clip and air duct. The drilling rig inserts drill rod 1 and backflushing device 2 into the bottom of the anchor cable hole. The air compressor delivers high-pressure airflow to backflushing device 2 through the air supply channel 11 inside drill rod 1. Backflushing device 2 changes the airflow direction, causing the air to be discharged from the air outlet channel 24 and air outlet 25. The high-pressure airflow suspends the residue at the bottom and on the hole wall inside the anchor cable hole and blows it out of the hole along the hole wall. Driven by the drilling rig, the drill rod gradually moves along the hole opening, cleaning the residue inside the hole.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for cleaning slag from the hole of a prestressed anchor cable, characterized in that, The device includes a drill rod and a backflush device connected coaxially. The drill rod has a through air supply channel inside. The backflush device includes a conical head, a first guide tube, and a second guide tube connected in sequence along the axial direction. The diameter of the first guide tube is larger than that of the second guide tube. One end of the second guide tube is fixedly connected to the drill rod. Multiple connecting rods are evenly distributed around the outer wall of the other end of the second guide tube. The other end of the connecting rods is fixedly connected to the inner wall of the first guide tube. The annular gap between the first and second guide tubes forms an air outlet channel.

2. The device for cleaning slag inside prestressed anchor cable holes according to claim 1, characterized in that, The width of the air outlet duct should be set to 5-8cm.

3. The device for cleaning slag inside prestressed anchor cable holes according to claim 1, characterized in that, The side wall of the second guide tube is provided with several rows of inclined air outlet groups. The axis of the air outlet of each row of air outlet groups forms an acute angle with the axis of the second guide tube, and the air outlet direction is inclined from the side of the conical head to the side of the drill rod.

4. The device for cleaning slag inside a prestressed anchor cable hole according to claim 3, characterized in that, Each set of air outlets includes 2-6 air outlets evenly spaced along the circumference of the side wall of the second guide tube.

5. The device for cleaning slag inside a prestressed anchor cable hole according to claim 3, characterized in that, The angle between the axis of the air outlet and the axis of the second guide tube is 20°-60°.

6. The device for cleaning slag inside a prestressed anchor cable hole according to claim 1, characterized in that, An annular mounting plate is provided on the inner wall of the second guide tube near the drill rod. Multiple positioning plates are provided at equal intervals along the circumference of the outer wall of the drill rod. The mounting plate and the positioning plate are welded and fixed together.

7. The device for cleaning slag inside a prestressed anchor cable hole according to claim 1, characterized in that, Multiple reinforcing ribs are welded and fixed to the outer surface of the conical head, and the reinforcing ribs are evenly distributed with the tip of the conical head as the center.

8. The device for cleaning slag inside a prestressed anchor cable hole according to claim 1, characterized in that, The diameter of the conical head is the same as the diameter of the first guide tube, and the conical head and the first guide tube are integrally formed or seamlessly welded.

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