An overhead beam device

Abstract

This application discloses an overhead crossbeam device, comprising: an anchor, which is anchored in a drilled hole in the tunnel wall; a support member, which is fixed to the anchor and has its top surface forming a crossbeam support surface; and a fastener, which is bolted to the support member and cooperates with the support member to clamp the crossbeam. The modular components achieve reliable fixation of the crossbeam, solving the problems of easy loosening and difficult disassembly of crossbeams in traditional installations. It also provides a structural foundation for subsequent adjustment and maintenance, expanding its applicability to various tunnel environments.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety production equipment, specifically to an overhead crossbeam device. Background Technology

[0002] The installation of tunnel crossbeams is a crucial step in mining and tunnel engineering. Traditionally, crossbeams are installed using direct drilling, where holes are drilled in both sides of the tunnel wall, and the crossbeam is inserted directly into the holes, relying on the friction of the hole wall or concrete pouring for fixation. However, this method has significant technical drawbacks. First, the surrounding rock of the tunnel undergoes creep deformation due to geological stress. Traditionally drilled crossbeams, in rigid contact with the hole wall, cannot adapt to this deformation, easily leading to localized stress concentration, causing crossbeam deformation, breakage, or detachment. Second, maintainability is poor; once a concrete-fixed crossbeam is damaged, disassembly is difficult, requiring re-drilling or breaking up the concrete, which is costly and time-consuming.

[0003] Existing technology CN219010934U provides a crossbeam mounting bracket for an overhead personnel carrier in coal mines. It discloses a bracket body composed of a fixed support plate, a frame beam, and a support beam. The support plate is fixed using anchor bolts, and the crossbeam is then fixed to the support beam using U-bolts. However, relying solely on the frictional force generated by the pre-tightening force of the U-bolts to fix the crossbeam is prone to slippage and loosening along the support beam surface in mine vibrations or steeply inclined roadways, posing a safety hazard. Furthermore, the contact between the U-bolts and the crossbeam is a "line contact," concentrating the clamping force at two contact points, leading to a sudden increase in local stress in the crossbeam. After long-term use, the contact area of ​​the crossbeam is prone to plastic deformation, affecting structural integrity. Therefore, there is an urgent need for a novel overhead crossbeam device. Utility Model Content

[0004] The present invention aims to provide an overhead beam device that achieves reliable fixation of the beam through modular components, thereby solving the problems of easy loosening and inconvenience in replacement of the beam in traditional installation.

[0005] An overhead beam device, comprising:

[0006] An anchor, which is anchored in a borehole in the tunnel wall;

[0007] The support member is fixed to the anchor and its top surface forms a beam support surface;

[0008] Fasteners are bolted to the support member and cooperate with the support member to clamp the crossbeam.

[0009] The working principle and beneficial effects of this utility model:

[0010] Anchors are fixed to the tunnel wall through drilling, providing a basic fixing point for the overall structure; the load-bearing components are fixed on the anchors, forming the supporting plane of the crossbeam and bearing the vertical load of the crossbeam; fasteners are connected to the load-bearing components through bolts, clamping the crossbeam to the load-bearing components vertically to prevent the crossbeam from loosening or falling off.

[0011] Breaking away from the traditional rigid connection method of direct drilling and embedding, this invention achieves reliable fixation of the crossbeam through modular components. This solves the problems of easy loosening and difficult disassembly of the crossbeam in traditional installations, while also providing a structural foundation for subsequent adjustment and maintenance. Its applicability is expanded to various roadway environments. Compared to existing U-bolt technologies, the clamping structure improves the reliability of the crossbeam fixation, preventing slippage even in the vibration environment of a mine.

[0012] In the optimized configuration, the fastener is a pressure plate, which forms a clamping structure with the carrier. Both the pressure plate and the carrier are provided with mounting holes, and the bolt passes through the mounting holes to achieve fastening.

[0013] The fasteners adopt a pressure plate structure, which forms a clamping space around the crossbeam with the load-bearing components. The surface contact increases the stress area of ​​the crossbeam, reduces local stress, and avoids plastic deformation.

[0014] In the optimized configuration, the anchor includes an anchor rod, the bearing member is a plate-like structure, and the bottom of the bearing member is fixedly connected to the anchor rod.

[0015] The anchor bolt is directly fixed to the bottom of the plate-shaped bearing member (by bolt or welding), and the top surface of the bearing member directly supports the crossbeam, forming a short path for load transfer and reducing intermediate stress links.

[0016] Ideally, the number of anchor bolts is at least two, and they are evenly spaced along the bottom of the bearing member.

[0017] At least two anchor rods are evenly spaced along the bottom of the load-bearing component, with each anchor rod independently bearing part of the load, forming a multi-support balance system to avoid local overload of the load-bearing component.

[0018] In an optimized configuration, the end of the crossbeam is provided with a positioning boss, and the supporting surface of the bearing member is provided with a positioning groove that mates with the positioning boss.

[0019] The positioning boss at the end of the crossbeam is embedded in the positioning groove of the bearing to form a mechanical engagement. The clamping force restricts the displacement of the crossbeam laterally, replacing the simple friction constraint of the existing technology.

[0020] The optimized version features anti-slip serrations on the top of the support member.

[0021] In an optimized configuration, one end of the anchor rod is anchored to a depth of 1 / 3 to 1 / 2 of the tunnel wall thickness, and the other end of the anchor rod extends to the edge of the bottom of the bearing member.

[0022] The anchoring depth of the anchor bolt is deep into the stable rock mass to ensure anchoring force; the other end extends to the bottom edge of the bearing member to shorten the lever arm and reduce the deformation of the bearing member caused by bending moment. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an overhead beam device;

[0024] Figure 2 for Figure 1 A three-dimensional view of the device.

[0025] The reference numerals in the accompanying drawings include: pressure plate 1, crossbeam 2, load-bearing component 3, anchor rod 4, and bolt 5. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation methods:

[0027] Example: Figure 1 and Figure 2 As shown, an overhead crossbeam device involves drilling two φ25mm holes (400mm deep) at predetermined positions on the tunnel wall using an anchor drilling machine, with a hole spacing of 300mm. Anchoring agent is injected into the holes, anchor rods 4 are inserted, and the holes are rotated and stirred. After standing for several minutes, the anchoring agent is allowed to solidify. The anchor rods 4 are two φ20mm high-strength threaded steel anchor rods (material 40Cr), each 1.0m long. The other end of the anchor rod 4 extends to the bottom edge of the bearing member 3 and is fixedly welded to the bottom of the bearing member 3. The bearing member 3 is made of Q345B steel plate and is generally rectangular in shape.

[0028] The fastener is a pressure plate 1 made of Q345B material. The pressure plate 1 and the bearing member 3 are provided with corresponding mounting holes. The end of the crossbeam 2 is placed on the bearing members 3 on both sides, the pressure plate 1 is placed (covering the flange of the crossbeam 2), the M20 bolt 5 is inserted and tightened to ensure that the pressure plate 1 is in full contact with the flange of the crossbeam 2 and is pressed tightly.

[0029] Anchor bolt 4 is anchored to the tunnel wall through drilling, providing a foundation fixing point for the overall structure; bearing member 3 is fixed on anchor bolt 4, forming a supporting plane for beam 2, and bearing the vertical load of beam 2; pressure plate 1 is connected to bearing member 3 through bolts 5, clamping beam 2 vertically on bearing member 3 to prevent beam 2 from loosening or falling off.

[0030] This application breaks through the traditional rigid connection method of direct drilling and embedding, and achieves reliable fixation of the crossbeam 2 through modular components. This solves the problems of easy loosening and difficult disassembly of the crossbeam 2 in traditional installation, while providing a structural foundation for subsequent adjustment and maintenance, and expanding the scope of application to various roadway environments. Compared with the U-bolt of the prior art, the clamping structure improves the fixation reliability of the crossbeam 2, and there is no slippage in the vibration environment of the mine.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An overhead beam device, characterized in that, include: An anchor, which is anchored in a borehole in the tunnel wall; The support member is fixed to the anchor and its top surface forms a beam support surface; Fasteners are bolted to the support member and cooperate with the support member to clamp the crossbeam.

2. The overhead beam device according to claim 1, characterized in that: The fastener is a pressure plate, which forms a clamping structure with the carrier. Both the pressure plate and the carrier are provided with mounting holes, and the bolt passes through the mounting holes to achieve fastening.

3. The overhead beam device according to claim 2, characterized in that: The anchor includes an anchor rod, and the bearing member is a plate-shaped structure, with the bottom of the bearing member fixedly connected to the anchor rod.

4. The overhead beam device according to claim 3, characterized in that: The number of anchor bolts is at least two, and they are evenly spaced along the bottom of the bearing member.

5. The overhead beam device according to claim 4, characterized in that: The end of the crossbeam is provided with a positioning boss, and the supporting surface of the bearing member is provided with a positioning groove that mates with the positioning boss.

6. The overhead beam device according to claim 5, characterized in that: The top of the support member is provided with anti-slip serrations.

7. The overhead beam device according to claim 6, characterized in that: The anchoring depth of one end of the anchor rod is 1 / 3 to 1 / 2 of the tunnel wall thickness, and the other end of the anchor rod extends to the edge of the bottom of the bearing member.

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