Auxiliary positioning device for drilling advanced small guide pipe of subsurface tunnel

Abstract

The utility model discloses an auxiliary positioning device for drilling an advanced small guide pipe of a subsurface tunnel. The auxiliary positioning device comprises a positioning frame, a positioning rod, a limiting pipe, a guide pipe and a fastening bolt. Wherein the positioning frame comprises a top plate, a bottom plate and connecting columns, the top plate and the bottom plate are horizontally arranged, and the two sides of the top plate and the two sides of the bottom plate are fixedly connected through the vertically-arranged connecting columns. The positioning rod is parallel to the top plate and the bottom plate, and one end of the positioning rod is fixedly connected with the connecting column. Limiting pipes are symmetrically fixed to the two sides of the outer side wall of the guide pipe. The limiting pipe is movably connected to the positioning rod in a sleeving mode so that the guide pipe can be horizontally and detachably arranged on the left side of the connecting column between the top plate and the bottom plate. Screw holes are formed in the right end plate face of the top plate and the right end plate face of the bottom plate, and the vertically-arranged fasteners are in threaded connection with the screw holes. The auxiliary positioning device not only can guide and restrain the drill rod of the drilling equipment and effectively improve the drilling accuracy, but also is suitable for the drilling requirements of different aperture specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel reinforcement engineering, in particular to an auxiliary positioning device for drilling a small-pipe hole in a dark-excavated tunnel. Background Art

[0002] The advance small pipe is a tubular structure used to stabilize the tunnel excavation working surface. It has a conical head at one end and several overflow holes on the side wall. The advance small pipe is mainly used to inject curing agents into weak, loose, and poorly self-stabilizing sand layers, gravel, and broken rock layers to improve stability. This helps to improve the stability of the tunnel working surface during the period between excavation completion and initial support, allowing construction to proceed smoothly. The advance small pipe support is usually used in conjunction with a steel arch. During construction, the steel arch is first installed and fixed to the excavation working surface in the tunnel that needs to be reinforced. Then, a hole is drilled into the excavation working surface through the reserved openings in the steel arch. After completion, the advance small pipe is inserted into the drilled hole for subsequent grouting. Currently, when using a handheld drilling device for drilling, the hole position is easily offset, especially at the beginning of drilling. Since most of the drill rod is located outside, the drilling is more likely to deviate. Once the construction requirements are exceeded, the subsequent reinforcement effect will be reduced, and the project requirements may even fail to be met. Utility Model Content

[0003] To address the aforementioned issues, the present invention provides a device for assisting with positioning in advance small-diameter conduit drilling in dark tunnels. This device not only guides and constrains the drill rod of the drilling equipment, improving drilling accuracy, but also accommodates drilling requirements of varying hole diameters. Specifically, the present invention's technical solution is as follows.

[0004] An auxiliary positioning device for advanced small-conductor drilling in a dark tunnel comprises: a positioning frame, a positioning rod, a limiting tube, a guide tube and a fastening bolt. The positioning frame comprises a top plate, a bottom plate and a connecting column, the top plate and the bottom plate are both arranged horizontally, and both sides of the top plate and the bottom plate are fixedly connected by the connecting column arranged vertically to form a positioning frame. The positioning rod is arranged between the top plate and the bottom plate in parallel, and one end of the positioning rod is fixedly connected to the connecting column. The limiting tubes are symmetrically fixed on both sides of the outer wall of the guide tube, and the limiting tubes are arranged along the length direction of the guide tube. The limiting tube is movably sleeved on the positioning rod so that the guide tube is horizontally detachably arranged on the left side of the connecting column between the top plate and the bottom plate. The right end plate surfaces of the top plate and the bottom plate are provided with screw holes, in which the fastening bolts arranged vertically are threadedly connected to fix the positioning device to the steel arch frame of the tunnel excavation working face.

[0005] Furthermore, each outer side wall of the guide tube is provided with at least two position-limiting tubes, one disposed on the upper side and the other on the lower side, and each position-limiting tube corresponds to one positioning rod.

[0006] Furthermore, the guide tube and the limiting tube are fixedly connected via a supporting connecting rod, so that guide tubes of different diameters can be installed in the positioning frame by using supporting connecting rods of different lengths.

[0007] Furthermore, a fastening nut is threaded on the other end of the positioning rod, and the limiting tube is fastened to the positioning rod.

[0008] Furthermore, an electromagnet is fixed on the connecting column, and the electromagnet is located on the right side of the connecting column to adsorb the positioning frame and the steel arch frame together.

[0009] Furthermore, a fastening structure is included on the left side of the connecting column, comprising an upper adjustment rod, a lower adjustment rod, and an arc-shaped plate. The adjustment rod is threadedly connected to a screw hole on the top plate, the lower adjustment rod is threadedly connected to a screw hole on the bottom plate, and the lower end of the upper adjustment rod and the upper end of the lower adjustment rod are both rotatably connected to the arc-shaped plate to clamp and secure the guide tube.

[0010] Furthermore, the upper adjusting rod, the lower adjusting rod and the arc plate are all rotatably connected via a ball hinge structure.

[0011] Furthermore, the steel arch is pre-opened with marking holes for drilling holes into the tunnel excavation working face.

[0012] Compared with the prior art, the present invention achieves at least the following beneficial effects: The present invention's auxiliary positioning device for advanced small-guide pipe drilling in a dark tunnel can support and guide the drill rod of the drilling equipment via the guide tube, effectively preventing the problem of drill hole deviation. Furthermore, the structure formed by the limiting tube and the guide tube cooperates with the positioning rod, allowing the guide tube to be detachably connected to the positioning rod. This allows for replacement of guide tubes of different diameters to accommodate drill rods of varying diameters and create holes of varying borehole diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 This is a front view of the auxiliary positioning device for advanced small-conductor drilling in a dark tunnel in the following embodiments.

[0015] Figure 2 1 is a top view of the guide tube in the following embodiments.

[0016] Figure 3 It is a side view of the auxiliary positioning device for advanced small-conductor drilling in a dark tunnel in the following embodiment.

[0017] The symbols in the accompanying drawings represent: 1-positioning frame, 2-positioning rod, 3-limiting tube, 4-guide tube, 5-fastening bolt, 6-steel arch frame, 7-electromagnet, 8-marking hole, 9-upper adjusting rod, 10-lower adjusting rod, 11-arc plate, 12-ball hinge structure, 101-top plate, 102-bottom plate, 103-connecting column, 201-support connecting rod, 202-fastening nut, 601-upper wing plate, 602-lower wing plate, 603-web plate. DETAILED DESCRIPTION

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0019] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to needs to have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0020] refer to Figure 1 and Figure 2 , an example of an auxiliary positioning device for advanced small-conductor drilling in a dark tunnel is provided, comprising: a positioning frame 1, a positioning rod 2, a limiting tube 3, a guide tube 4 and a fastening bolt 5. Specifically: the positioning frame 1 comprises a top plate 101, a bottom plate 102 and a connecting column 103. Wherein: the top plate 101 and the bottom plate 102 are both arranged horizontally, and the top plate 101 is arranged above the bottom plate 102 in parallel. The front and rear sides of the top plate 101 and the bottom plate 102 are fixedly connected by the vertically arranged connecting column 103, and the connecting column 103 is biased to the left side of the top plate 101 and the bottom plate 102, so that the I-shaped steel arch frame 6 (formed by the upper wing plate 601, the lower wing plate 602 and the web 603) is stuck between the top plate 101 and the bottom plate 102 of the positioning frame 1 (as shown in FIG. Figure 1 The positioning frame 1 can be made of light metal such as aluminum alloy, or steel.

[0021] The positioning rod 2 is parallel to the top plate 101 and the bottom plate 102 and is arranged between the two, and the right end of the positioning rod 2 is fixedly connected to the connecting column 103. The limiting tubes 3 are symmetrically arranged on both sides of the outer wall of the guide tube 4, and the limiting tubes 3 are arranged along the length direction of the guide tube 4. The guide tube 4 and the limiting tube 3 are fixedly connected by a supporting connecting rod 201, and when in use, the limiting tube 3 is movably sleeved on the positioning rod 2, that is, the positioning rod 2 is inserted into the limiting tube 3, so that the guide tube 4 is horizontally detachably arranged at the central position between the top plate 101 and the bottom plate 102, and the guide tube 4 is located on the left side of the connecting column 103 (such as Figure 1 As shown), the steel arch 6 is located on the right side of the connecting column 103 and the guide tube 4.

[0022] The right end surfaces of the top and bottom plates 101 and 102 are each provided with screw holes. A fastening bolt 5 is threaded into each screw hole, one end of which can pass through the screw hole and extend into the positioning frame 1, facilitating the fastening of the positioning frame 1 to the steel arch 6. During use, the right end of the positioning frame 1 is first clamped onto the steel arch 6 fixed to the tunnel excavation working surface. The front ends of the upper and lower wing plates 601 and 602 of the steel arch 6 then rest against the connecting column 103. The fastening bolts 5 are then tightened until the upper fastening bolt 5 abuts against the upper surface of the upper wing plate 601 and the lower fastening bolt 5 abuts against the lower surface of the lower wing plate 602, thereby securing the entire auxiliary positioning device to the steel arch 6. At this point, the right end of the guide tube 4 is aligned with the drilled mark hole in the center of the web 603 of the steel arch 6. After completion, the drill rod of the drilling equipment is passed through the guide tube 4 and then drilled into the rock and soil of the tunnel excavation working face from the marked hole 8.

[0023] This embodiment effectively prevents the problem of drilling deviation during the drilling process by constraining and guiding the drill rod by the guide tube 4. At the same time, the auxiliary positioning device of this embodiment can also be removed from the steel arch 6 and moved to the next position where drilling is required for use. In addition, since the guide tube 4 is detachably connected to the positioning rod 2, the connection of guide tubes of different diameters can be achieved to accommodate drill rods of different diameters and to open holes of different diameters. It should be understood that the smaller the diameter of the guide tube 4, the longer the length of the support link 201 connected thereto, so that the limiting tube 3 connected to the end of the support link 201 can be plugged into the positioning rod 2. When the guide tube 4 needs to be replaced, it is pulled out from the positioning rod 2, and then the limiting tube 3 of the new guide tube 4 is plugged into the positioning rod 2.

[0024] refer to Figure 1In another embodiment, a fastening nut 202 is threaded onto the left end of the positioning rod 2 of the auxiliary positioning device of the above embodiment. After the positioning tube 3 is inserted into the positioning rod 2, the fastening nut 202 is tightened to secure the positioning tube 3 to the positioning rod 2, thereby helping to prevent the guide tube 4 from falling during use. It should be understood that during installation, the fastening nut 202 must be removed from the positioning rod 2 before the positioning tube 3 is inserted into the positioning rod 2.

[0025] refer to Figure 1 In another embodiment, the front and rear outer side walls of the guide tube 4 of the auxiliary positioning device of the above embodiment are provided with two upper and lower limiting tubes 3, and each limiting tube 3 corresponds to one positioning rod 2, so that the guide tube 4 is more stably connected to the positioning frame 1.

[0026] refer to Figure 1 and Figure 2 In another embodiment, an electromagnet 7 is further fixed to the right side wall of the connecting column 103 of the positioning frame 1 of the above embodiment. After the auxiliary positioning device is fixed to the steel arch 6 in the above manner, the electromagnet 7 is attached to the web 603 of the steel arch 6. When the power switch of the electromagnet 7 is turned on, the electromagnet 7 is attracted and fixed to the web 603, thereby better temporarily fixing the auxiliary positioning device to the steel arch 6 and facilitating removal.

[0027] In another embodiment, the auxiliary positioning device of the above embodiment further includes a fastening structure located on the left side of the connecting column. Figure 1 The fastening structure comprises an upper adjustment rod 9, a lower adjustment rod 10, and a curved plate 11. Both the upper and lower adjustment rods 9 and 10 are vertically arranged, with the adjustment rod 9 threaded into a screw hole on the top plate 101 and the lower adjustment rod 10 threaded into a screw hole on the bottom plate 102. The lower ends of the upper and lower adjustment rods 9 and 10 are both pivotally connected to the curved plate 11. This pivoting connection can employ a ball hinge structure 12 or other similar mechanism to clamp and secure the guide tube 4, enhancing its stability. During use, after the guide tube 4 is mounted on the positioning rod 2, the upper and lower adjustment rods 9 and 10 are rotated to clamp the guide tube 4 between the curved grooves of the two curved plates 11. Furthermore, because the fastening structure allows for continuous adjustment of the spacing between the two curved plates 11, it is suitable for clamping guide tubes 4 of varying diameters.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A blind tunnel advance small guide tube drilling auxiliary positioning device, characterized in that: include: A positioning frame, comprising a top plate, a bottom plate and connecting columns, wherein the top plate and the bottom plate are both arranged horizontally, and both sides of the top plate and the bottom plate are fixedly connected by the vertically arranged connecting columns to form a positioning frame; A positioning rod, the positioning rod being parallel to the top plate and the bottom plate and arranged between the two, and one end of the positioning rod being fixedly connected to the connecting column; A guide tube, wherein limit tubes are symmetrically fixed on both sides of the outer wall of the guide tube and are arranged along the length direction of the guide tube; the limit tubes are movably sleeved on the positioning rod so that the guide tube can be horizontally and detachably arranged on the left side of the connecting column between the top plate and the bottom plate; Fastening bolts: the right end surfaces of the top plate and the bottom plate are both provided with screw holes, in which the fastening bolts arranged vertically are threadedly connected.

2. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 1 is characterized in that: At least two position-limiting tubes are provided on the outer side wall of each side of the guide tube, one being arranged on the upper side and the other on the lower side, and each position-limiting tube corresponds to one positioning rod.

3. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 1 is characterized in that: The guide tube and the limiting tube are fixedly connected via a supporting connecting rod; by adopting supporting connecting rods of different lengths, guide tubes of different diameters can be installed in the positioning frame.

4. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 1 is characterized in that: The other end of the positioning rod is threaded with a fastening nut, and the limiting tube is fastened to the positioning rod.

5. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 1 is characterized in that: An electromagnet is fixed on the connecting post, and the electromagnet is located on the right side of the connecting post.

6. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 1 is characterized in that: It also includes a fastening structure located on the left side of the connecting column, which includes: an upper adjusting rod, a lower adjusting rod and an arc-shaped plate; wherein: the adjusting rod is threadedly connected to the screw hole on the top plate, the lower adjusting rod is threadedly connected to the screw hole on the bottom plate, and the lower end of the upper adjusting rod and the upper end of the lower adjusting rod are both rotatably connected to the arc-shaped plate.

7. The blind tunnel advanced small conduit drilling auxiliary positioning device according to claim 6 is characterized in that: The upper adjusting rod, the lower adjusting rod and the arc plate are all rotatably connected via a ball hinge structure.

8. The blind tunnel advanced small conduit drilling auxiliary positioning device according to any one of claims 1 to 7, characterized in that: Marking holes for drilling holes into the tunnel excavation working surface are pre-opened on the I-shaped steel arch frame used for fixing the auxiliary positioning device, and the I-shaped steel arch frame is fixed on the tunnel excavation working surface.

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