A fast tunnel excavation and conveying system

Abstract

The present invention belongs to the technical field of conveying equipment, and specifically relates to a rapid tunnel excavation and conveying system, comprising an anchor miner, a turnable transfer conveying mechanism, a slidable track transfer mechanism and a retractable belt conveying mechanism. The turnable transfer conveying mechanism is composed of a plurality of self-propelled belt conveyors connected by rotatable hinges through connecting pieces, and the rear end of the last self-propelled belt conveyor is connected to a bridge-type transfer belt conveyor that can swing left and right; the slidable track transfer mechanism comprises a suspension belt conveyor, a suspension track laid on the tunnel roof and a plurality of groups of load-bearing pulleys, and the suspension belt conveyor is slidably suspended in the tunnel through the load-bearing pulleys; the retractable belt conveyor mechanism comprises a retractable tail and head assembly, a middle roller group comprises a plurality of groups of suspended upper rollers and lower rollers, as well as a belt storage bin and a belt tensioning device, which solves the problems that the existing tunneling and conveying system cannot adapt to the turning tunneling of the connecting tunnel and the transfer belt conveyor cannot quickly follow the moving machine for transportation.

Description

Technical Field

[0001] The present invention belongs to the technical field of conveying equipment, and in particular relates to a fast tunnel excavation and conveying system. Background Art

[0002] Anchor miners are important tunnel excavation machines, and belt conveyors are essential bulk material conveying equipment. Modern coal mining and tunnel excavation, among other tunnel construction sites, often require a rapid tunneling and conveying system consisting of these two machines. However, existing tunneling and conveying systems utilize belt conveyors that can only travel in a straight line and are unable to meet the requirements for turning and conveying materials in tunneling connecting tunnels. While shuttle cars can be used to achieve turning and transferring materials, their conveying efficiency is relatively low, making them difficult to adapt to the rapid and continuous tunneling of connecting tunnels. Furthermore, existing rapid tunneling and conveying systems utilize a ground-sliding truss structure, where the belt conveyor drags and slides across the tunnel floor. This not only occupies a large amount of ground space but also places high demands on the flatness and hardness of the tunnel floor. Soft or broken ground can hinder the movement of the belt conveyor, while hardening the tunnel floor is extremely difficult, severely impacting the tunneling efficiency and overall project progress of the tunneling and conveying system. Summary of the Invention

[0003] In response to the above situation, the present invention provides a rapid tunnel excavation and transportation system, which solves the problem that the existing tunnel excavation and transportation system cannot realize the turning transportation of connecting tunnel excavation materials and the transfer belt conveyor cannot quickly follow the machine during the excavation process.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A rapid tunnel excavation and conveying system includes a digging and anchoring machine, a turnable transfer conveying mechanism, a slidable track transfer conveying mechanism and a retractable belt conveying mechanism. The turnable transfer conveying mechanism is composed of multiple self-propelled belt conveyors connected end to end, and the self-propelled belt conveyors are rotatably hinged to each other through connecting pieces; further, the self-propelled belt conveyor is a self-propelled belt transfer vehicle, including a main conveying device and a turning travel device arranged below the belt conveyor for driving the belt conveyor to turn or move in a straight line.

[0006] According to the material conveying direction, the first self-propelled belt conveyor of the turnable transfer conveying mechanism is overlapped under the discharge end of the anchor miner, and the rear end of the last self-propelled belt conveyor of the turnable transfer conveying mechanism is connected to a bridge-type transfer belt conveyor that can swing left and right.

[0007] Furthermore, the bridge-type transfer belt conveyor is also connected to the turnable transfer conveyor mechanism via a connector. The connector includes a bearing seat, with a tapered roller bearing disposed on the upper and lower portions of each bearing seat. A rotation pin is coaxially and vertically extending between the two tapered roller bearings. The front end of the bridge-type transfer belt conveyor is fixedly connected to the rotation pin at the rear end of the turnable transfer conveyor mechanism, and the rear end of the bridge-type transfer belt conveyor is connected to the slidable track transfer mechanism via a connecting frame.

[0008] The sliding rail transfer mechanism includes a suspension belt conveyor, a suspension rail and multiple sets of load-bearing pulleys. The suspension rail is fixedly laid under the tunnel roof. Furthermore, the suspension rail is an I-beam single rail anchored and laid on the tunnel roof, that is, a monorail railway. As the tunnel is continuously excavated, the suspension rails behind the suspension belt conveyor need to be gradually dismantled, and the dismantled suspension rails need to be laid forward. Each load-bearing pulley can be rotatably matched on the suspension rail. The suspension belt conveyor is suspended in the tunnel through multiple sets of connecting frames correspondingly connected under each load-bearing pulley. The front end of the suspension belt conveyor is overlapped under the bridge transfer belt conveyor to receive the material from the bridge transfer belt conveyor. The entire suspension belt conveyor is hung in the tunnel and connected to the bridge transfer belt conveyor. It can follow the self-propelled belt conveyor to move forward and backward and slide a certain distance to reduce the extension frequency of the retractable belt conveyor mechanism.

[0009] The retractable belt conveyor mechanism includes a retractable tail, a middle roller group, a head assembly, and a conveyor belt. The retractable tail includes a tail frame, a tail roller mounted on the tail frame, and a retractable traction device. Furthermore, the retractable traction device is a crawler-type walking mechanism. The retractable tail is overlapped below the suspended belt conveyor. The middle roller group includes multiple groups of suspended upper and lower rollers. Each upper roller is suspended below the roadway roof at intervals via suspension members, and each lower roller is correspondingly suspended below the upper rollers via hanging members. The head assembly includes a head frame, a head roller mounted on the head frame, a belt drive device, a belt storage bin located in front of the head frame, and a belt tensioning device. The conveyor belt is sequentially threaded around the belt storage bin, the head roller, the middle roller group, and the tail roller. Furthermore, the belt tensioning device is a dual-cylinder deviation-adjusting tensioning mechanism capable of tightening and loosening the belt and preventing deviation.

[0010] The present invention also includes other components that enable it to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the present invention, such as: anchor miner, self-propelled belt conveyor, crawler walking mechanism, and the head roller, tail roller, belt storage bin, belt tensioning device, retractable tail of the retractable belt conveyor, etc., all adopt the existing technology in the field.

[0011] The beneficial effects of the present invention are as follows:

[0012] The present invention provides a rapid tunnel excavation and transportation system, which adopts a turnable transfer method of overlapping multiple groups of self-propelled belt conveyors, solving the problem that the existing tunneling and transportation system cannot realize the turning transportation of connecting tunnel excavation materials; adopting a track transfer belt conveyor with a top plate laying track solves the problem that the transfer belt conveyor cannot realize rapid following and moving of the machine during the excavation of the anchor mining machine, and the problem that the transfer belt conveyor has difficulty in moving due to soft and broken ground, thereby reducing the number of times the belt conveyor is extended; at the same time, adopting a hanging roller structure solves the problems that the laying of the belt conveyor occupies a large ground space, has high requirements for the flatness and hardness of the tunnel bottom plate, and is inconvenient for hardening the ground, thereby improving the excavation efficiency and ensuring the progress of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the tunnel rapid excavation and conveying system.

[0014] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0015] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0016] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part C in the middle.

[0017] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of part D in the middle.

[0018] Figure 6 for Figure 3 Schematic diagram of the structure after the middle suspension belt conveyor slides forward to the stroke S.

[0019] Figure 7 for Figure 2 Schematic diagram of the top view of the structure of the mid-bridge transfer belt conveyor when it swings at an angle of α.

[0020] Figure 8 for Figure 7 Schematic diagram of the structure of the mid-level anchor drilling machine in the turning excavation state when excavating a connecting tunnel. DETAILED DESCRIPTION

[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0022] Example

[0023] like Figure 1As shown, a tunnel rapid excavation and conveying system includes an anchor miner 1, a turnable transfer conveying mechanism 2, a slidable track transfer mechanism 3 and a retractable belt conveying mechanism 4. Figure 2 As shown, the turnable transfer conveying mechanism is composed of five self-propelled belt conveyors 21 connected head to tail, and the self-propelled belt conveyors are rotatably connected to each other through connecting pieces 22. Figure 7 As shown, the front self-propelled belt conveyor of the turnable transfer conveyor mechanism is overlapped below the discharge end of the anchor miner, and the rear end of the last self-propelled belt conveyor of the turnable transfer conveyor mechanism is connected to a bridge-type transfer belt conveyor 5 that can swing left and right, so as to better adapt to the situation where the linear conveying axis of the rear sliding track transfer mechanism and the retractable belt conveyor mechanism deviates to a certain extent; Figure 8 As shown, the two self-propelled belt conveyors hingedly connected by the turnable transfer conveying mechanism are rotatably connected, which can realize the turnable excavation of the anchor drill in the connecting tunnel excavation and the turnable transportation of the subsequent conveying system.

[0024] like Figure 3 As shown, the sliding rail transfer mechanism includes a suspension belt conveyor 31, a suspension rail 32 and multiple sets of load-bearing pulleys 33. The suspension rail is fixedly laid under the tunnel roof, and each load-bearing pulley is rollably mounted on the suspension rail. The suspension belt conveyor is suspended in the tunnel through multiple sets of connecting frames 34 correspondingly connected to the bottom of each load-bearing pulley. The front end of the suspension belt conveyor is overlapped under the bridge transfer belt conveyor. Figure 6 As shown, the suspended belt conveyor receives the incoming materials from the bridge-type transfer belt conveyor. The entire suspended belt conveyor is hung in the tunnel and connected to the bridge-type transfer belt conveyor. It can follow the self-propelled belt conveyor to move forward and backward and slide a certain distance to reduce the extension frequency of the retractable belt conveyor mechanism.

[0025] like Figure 4 As shown, the retractable belt conveyor mechanism includes a retractable tail 41, a middle roller group 42, a head assembly 43 and a conveyor belt 44. The retractable tail includes a tail frame 411 and a tail roller 412 and a retractable traction device 413 arranged on the tail frame. The retractable tail is overlapped under the suspended belt conveyor. The middle roller group includes multiple groups of suspended upper rollers 421 and lower rollers 422. Each upper roller is suspended at intervals below the tunnel roof through a suspension member 423, and each lower roller is correspondingly suspended below the upper roller through a suspension member 424. The head assembly includes a head frame 431, a head roller 432 and a belt driving device 433 arranged on the head frame, as well as a belt storage bin 434 and a belt tensioning device 435 arranged in front of the head frame. The conveyor belt is sequentially passed through the belt storage bin, the head roller, the middle roller group and the tail roller.

[0026] The self-propelled belt conveyor is a self-propelled belt transfer vehicle, which adopts existing technology. Its specific structure is basically the same as the structural setting of the self-propelled belt transfer vehicle disclosed in the CN216128898U patent document, and will not be repeated here.

[0027] like Figure 5 As shown, the connecting member includes a bearing seat 221, with a tapered roller bearing 222 mounted on its upper and lower portions, respectively. A rotating pin 223 is coaxially and vertically inserted between the two tapered roller bearings. The front end of the bridge-type transfer belt conveyor is fixedly connected to the rotating pin at the rear end of the last self-propelled belt conveyor. The rear end of the bridge-type transfer belt conveyor is connected to the sliding track transfer mechanism via a connecting frame.

[0028] The suspension track is a single I-steel track anchored on the tunnel roof. The load-bearing roller adopts existing technology, and its specific structure is basically the same as the structural setting of the traveling trolley of the bridge crane disclosed in the CN212151360U patent document, which will not be repeated here.

[0029] The telescopic traction device is a crawler traveling mechanism. The crawler traveling mechanism adopts the existing technology, and its specific structure is basically the same as the crawler traveling mechanism of the self-leveling mechanism of the transverse belt conveyor disclosed in the patent document CN211168549U, and will not be repeated here.

[0030] The belt tensioning device is a double-cylinder deflection-adjusting tensioning mechanism. The belt tensioning device adopts existing technology, and its specific structure is basically the same as the double-cylinder deflection-adjusting tensioning mechanism disclosed in the CN213140239U patent document, and will not be repeated here.

[0031] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the scope of protection of the present invention.

Claims

1. A rapid tunnel excavation and conveying system, comprising an anchor miner, characterized in that: It also includes a turnable transfer conveying mechanism, a sliding track transfer mechanism and a retractable belt conveying mechanism. The turnable transfer conveyor mechanism is composed of multiple self-propelled belt conveyors connected head to tail. The self-propelled belt conveyors are self-propelled belt transfer vehicles. The self-propelled belt conveyors are rotatably hinged to each other through connecting members. The connecting members include a bearing seat, and a tapered roller bearing is respectively provided on the upper and lower parts of the bearing seat. A rotating pin is coaxially and vertically passed through the middle of the two tapered roller bearings. According to the material conveying direction, the first self-propelled belt conveyor of the turnable transfer conveyor mechanism is connected under the discharge end of the anchor miner, and the rear end of the last self-propelled belt conveyor of the turnable transfer conveyor mechanism is connected to a bridge-type transfer belt conveyor that can swing left and right; The slidable track transfer mechanism includes a suspension belt conveyor, a suspension track and multiple sets of load-bearing pulleys. The suspension track is fixedly laid under the tunnel roof. The suspension track is a single I-beam track anchored and laid on the tunnel roof. Each load-bearing pulley is rotatably arranged on the suspension track. The suspension belt conveyor is suspended in the tunnel through multiple sets of connecting frames correspondingly connected under each load-bearing pulley. The front end of the suspension belt conveyor is overlapped under the bridge-type transfer belt conveyor. The retractable belt conveyor mechanism includes a retractable tail, a middle roller group, a head assembly and a conveyor belt. The retractable tail includes a tail frame and a tail roller and a retractable traction device arranged on the tail frame. The retractable traction device is a crawler walking mechanism; the retractable tail is overlapped under the suspended belt conveyor, and the middle roller group includes multiple groups of suspended upper rollers and lower rollers. Each upper roller is suspended at intervals below the tunnel roof through a suspension member, and each lower roller is correspondingly suspended below the upper roller through a hanging member. The head assembly includes a head frame, a head roller and a belt driving device arranged on the head frame, as well as a belt storage bin and a belt tensioning device arranged in front of the head frame. The belt tensioning device is a double-cylinder deflection adjustment type tensioning mechanism; the conveyor belt is sequentially passed through the belt storage bin, the head roller, the middle roller group and the tail roller.

2. The rapid tunnel excavation and conveying system according to claim 1, characterized in that: The front end of the bridge-type transfer belt conveyor is fixedly connected to the rotating pin shaft of the rear end of the last self-propelled belt conveyor, and the rear end of the bridge-type transfer belt conveyor is overlapped with the slidable track transfer mechanism through a connecting frame.

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